UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM 10-K
    Annual Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the fiscal year ended December 31, 20162017
OR
    Transition Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from        to         
Commission File No. 1-13696
AK STEEL HOLDING CORPORATION
(Exact name of registrant as specified in its charter)
Delaware 31-1401455
(State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.)
   
9227 Centre Pointe Drive, West Chester, Ohio 45069
(Address of principal executive offices) (Zip Code)
Registrant’s telephone number, including area code: (513) 425-5000
Securities registered pursuant to Section 12(b) of the Act:
Title of Each Class  Name of Each Exchange on Which Registered
Common Stock $0.01 Par Value 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    No  

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Exchange Act.  Yes   No  

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    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    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 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.
Large accelerated filer Accelerated filer
Non-accelerated filer
Smaller reporting companyEmerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section13(a) of the Exchange Act. Yes No

Indicate by check mark whether the registrant is a shell company as defined in Rule 12b-2 of the Securities Exchange Act of 1934.  Yes    No  

Aggregate market value of the registrant’s voting stock held by non-affiliates at June 30, 2016: $1,102,982,7302017: $2,056,142,010
There were 314,789,404315,283,596 shares of common stock outstanding as of February 15, 2017.9, 2018.

DOCUMENTS INCORPORATED BY REFERENCE
The information required to be furnished pursuant to Part III of this Form 10-K will be set forth in, and incorporated by reference from, the registrant’s definitive proxy statement for the annual meeting of stockholders (the “2017“2018 Proxy Statement”), which will be filed with the Securities and Exchange Commission not later than 120 days after the end of the fiscal year ended December 31, 2016.

2017.
     




AK Steel Holding Corporation
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(Dollars in millions, except per share and per ton amounts or as otherwise specifically noted)

PART I

Item 1.Business.

Operations
Overview

AK Steel Holding Corporation (“AK Holding”) is a corporationwas formed under the laws of Delaware in 1993 and1993. Through its wholly owned subsidiary, AK Steel Corporation (“AK Steel”), it is an integrateda leading producer of flat-rolled carbon, stainless and electrical steelssteel products, primarily for the automotive, infrastructure and tubularmanufacturing, electrical power generation and distribution markets. AK Holding’s subsidiaries also provide customer solutions with carbon and stainless steel tubing products, through its wholly-owned subsidiary, AK Steel Corporation (“AK Steel”).tool design, hot- and cold-stamped steel components and assemblies. AK Steel is the successor through merger in 1999 to Armco Inc., which was formedand has built upon Armco’s rich history of creating leading-edge steel innovations since its formation in 1900.1899. Unless the context indicates otherwise, references to “we,” “us” and “our” refer to AK Holding and its subsidiaries.

Our mission is to create innovative, high-quality steel solutions for our customers in a safe, responsible and profitable manner, and our key values of safety, quality, productivity and innovation, along with environmental responsibility and sustainability, are the foundation of our mission. Our approximately 9,200 employees at manufacturing operations across seven states in the eastern U.S., as well as in Canada and Mexico, continue our legacy of innovation and operational excellence across markets and within our product portfolios to meet and surpass our customers’ needs for high-value steel products. We are the only steelmaker in the United StatesNorth America that can produce a combinationall three major categories of flat-rolled steels—carbon, stainless and electrical steels.electrical. In addition,2017, we are the only steelmaker in the United States operating both blast furnaces and electric arc furnaces,enhanced our portfolio of steel solutions by acquiring PPHC Holdings, LLC (“Precision Partners”), which provides us operational flexibilityadvanced-engineered solutions, tool design and build, hot- and cold-stamped steel components and complex assemblies for the opportunity to innovate across markets and within our product portfolios. Our primary operations include eight steelmaking and finishing plants, two coke plants and two tube manufacturing plants across six states—Indiana, Kentucky, Michigan, Ohio, Pennsylvania and West Virginia—and a tube manufacturing plant in Mexico. These operations produce flat-rolled carbon, specialty stainless and electrical steels that we sell in sheet and strip form, and carbon and stainless steel that we finish into welded steel tubing. We also produce metallurgical coal through our AK Coal Resources, Inc. (“AK Coal”) subsidiary. In addition, we operate trading companies in Mexico and Europe that buy and sell steel and steel products and other materials.

automotive market. In 2014, we acquired Severstal Dearborn, LLC, (“Dearborn”). The assets acquired includewhich primarily consisted of the integrated steelmaking assets located in Dearborn, Michigan, (“Dearborn Works”),and the Mountain State Carbon, LLC (“Mountain State Carbon”) cokemaking facility located in Follansbee, West Virginia, and interests in joint ventures that process flat-rolled steel products.Virginia.

Customers and Markets

Carbon steelsWe target customers who require the most technically demanding, highest-quality steel products, precise “just-in-time” delivery, technical support and product development assistance. Our enhanced product quality and delivery capabilities, as well as our emphasis on collaborative customer technical support and product planning, are critical factors in our ability to serve our customer markets. Our strategy is to focus on markets for our steel products that deliver higher margins, where possible, and reduce amounts sold into the lower margin steel spot markets, which have experienced substantial volatility in pricing over the past several years primarily as a result of the impact of low-priced, unfairly traded imports of foreign steel.

We sell our products to customers in three broad market categories: (i) automotive; (ii) infrastructure and manufacturing; and (iii) distributors and converters. The following table presents the percentage of our net sales to each of these markets:
Market 2017 2016 2015
Automotive 65% 66% 60%
Infrastructure and Manufacturing 16% 16% 16%
Distributors and Converters 19% 18% 24%

We sold approximately 70% of our flat-rolled steel shipments in 2017 under fixed base price contracts. These contracts are typically for one year and expire at various times throughout the year. Some of these contracts have a surcharge mechanism that passes through certain changes in input costs. We sold the remainder of our flat-rolled steel shipments in 2017 into the spot market at prevailing market prices or under annual contracts that have pricing provisions that are typically linked to a steel index with price adjustments based on a previous monthly or quarterly reference point.

Automotive Market

The automotive industry is our core market. We aim to address the principal needs of major automotive manufacturers and their suppliers, as we specialize in producing hard-to-make, high-quality steel products combined with demanding delivery performance, customer technical support and collaborative efforts to develop breakthrough solutions to help our customers meet their product requirements. In addition, many competitors do not have the capability to supply all of the products that we make for our automotive customers, such as steel for exposed automotive applications, the most advanced grades of advanced high strength steels (“AHSS”) and value-added stainless chrome products. The exacting requirements for servicing the automotive market generally enable us to obtain higher selling prices than sales of more commodity types of carbon and stainless steels to other markets.
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In light of the automotive market’s importance to us, North American light vehicle production has a significant impact on our total sales and shipments. North American light vehicle production for 2017 declined slightly to approximately 17.1 million units, representing a 3% decrease from the prior year. However, production declined more in the United States and Canada, where most of our steel is used. Demand for SUVs, crossovers and larger vehicles continued to increase while demand for smaller sedans and compact cars declined, and we benefited from intentionally targeting larger vehicle platforms to take advantage of the trend. In addition to benefiting from our exposure to consumers’ strong demand for larger vehicles, these vehicles also typically contain a higher volume of steel than smaller sedans and compact cars, providing us the opportunity to sell a greater proportion of our steel products to our automotive customers. Reflecting our concentration in the automotive industry, Ford Motor Company accounted for 12% of our net sales in each of 2017 and 2016, with FCA US LLC (an affiliate of Fiat Chrysler Automobiles N.V.) accounting for 11% of our net sales in 2016 but less than 10% of net sales in 2017. No other customer represented more than 10% of our net sales in either year.

Automotive manufacturers are under pressure to achieve heightened federally mandated fuel economy standards through 2025 (the Corporate Average Fuel Economy, or “CAFE,” standards). The CAFE standards generally require automobile manufacturers to meet an average fuel economy goal of 54.5 miles per gallon across the fleet of vehicles they produce by the year 2025, with certain milestones to be met in interim periods. As a result, our automotive customers are currently exploring various avenues for achieving the standards, including lightweighting of components and developing more efficient engines. Lightweighting efforts include testing alternatives to traditional carbon steels, such as AHSS, aluminum and other materials. This could reduce the aggregate volume of steel consumed by the automotive industry and impact our share of that volume. However, we believe there will be an increase in the demand for current and next-generation AHSS and our AHSS and other innovative steels will command values that will be margin enhancing. Therefore, we are working very closely with our automotive customers and their suppliers to develop innovative solutions using our developments in lightweighting, efficiency, strength, ductility and formability across our extensive product portfolio, in combination with our stamping capabilities. We are also working with our customers to develop heat-resistant steels for exhaust systems that can accommodate new engines running at higher temperatures to increase fuel economy.

Automotive manufacturers have also been increasing their development of hybrid/electric vehicles (“H/EVs”) in order to respond to the CAFE standards and growing customer acceptance of H/EVs. Many motors used in H/EVs being sold in the U.S. today are imported from foreign suppliers, but a trend toward local sourcing and manufacturing appears to be underway. We believe our strong foundation in electrical steels and collaboration with automotive manufacturers will provide us with an advantage in this market as it grows and matures in the future.

Infrastructure and Manufacturing Market

The infrastructure and manufacturing market primarily represents sales to manufacturers of power transmission and distribution transformers, who produce equipment for the electrical grid, as well as manufacturers of heating, ventilation and air conditioning equipment and appliances. Domestic construction activity and the replacement of aging infrastructure directly affects sales of our carbon, stainless and electrical steel products, particularly for grain-oriented electrical steel (“GOES”). Housing starts in the U.S. improved approximately 2% over the prior year, and we expect a general lift in demand for a variety of our steel products as new construction accelerates. Over a longer timeframe, we believe that the growth of H/EVs may drive higher demand for GOES to use in the electrical infrastructure necessary to support the charging needs for this additional demand for electricity.

In January 2016, new higher efficiency standards for electrical distribution transformers went into effect in the United States, which strengthened the domestic demand for GOES products. However, electrical steel pricing declined in many international markets, which resulted in GOES imports into the U.S. doubling in 2017 from 2016 and suppressing domestic electrical steel pricing in 2017. We continue to assess various alternatives to ensure that foreign producers of GOES are required to comply with U.S. trade laws, including encouraging the vigorous enforcement of existing laws and regulations.

Distributors and Converters Market

Steel distributors and converters typically source from the commodity carbon, stainless and electrical spot markets. Demand and pricing can be highly dependent on a variety of factors outside of our control, including global and domestic capacity of commodity steel products, the relative health of countries’ economies and whether they are consuming or exporting excess steel capacity, the nature of international trade agreements and international currencies, in addition to other factors, and therefore are subject to a high degree of volatility. Because of this volatility and our strategy to rationalize sales of unprofitable business, we have been reducing our exposure to this market.

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Geographic Presence

We sell our carbon steel products principally to customers in North America, and we sell our electrical and stainless steel products primarily in North America and Europe. Our customer base is geographically diverse and there is no single country outside the U.S. where our sales are material compared to our total net sales. Our material long-lived assets are located in the United States and Canada. The following shows net sales by geographic area and as a percentage of worldwide net sales:
  2017 2016 2015
Geographic Area Net Sales % Net Sales % Net Sales %
United States $5,453.4
 90% $5,226.9
 89% $5,837.2
 87%
Foreign countries 627.1
 10% 655.6
 11% 855.7
 13%
Total $6,080.5
 100% $5,882.5
 100% $6,692.9
 100%

Research, Innovation and Product Development

Our vision is to create innovative steel products and processes that surpass our customers’ needs today and for the future. Our product portfolio includes all the major categories of flat-rolled steel—carbon, stainless and electrical—and carbon and stainless tubular products. We are unwavering in our quality expectations, and we take a planned approach to continuously improve our products, processes and services. This approach is key to our strategic partnerships with our customers and earns awards from them, like the “Raw Material Supplier of the Year” award for 2017 from FCA US LLC. The award recognizes companies that have shown extraordinary commitment to innovation, quality, warranty, cost, delivery and FCA’s foundational principles, and we were the only steel company to receive the award in 2017.

Providing new, innovative products and breakthrough solutions is a strategic priority, as we believe differentiation of higher value carbon, stainless and electrical steels to meet challenging applications enables us to maintain and enhance our margins. We conduct a broad range of research and development activities aimed at improving existing products and developing new products, and our tradition of leading steel innovation has produced a highly diversified flat-rolled steel product line. In recent years, we have increased our historic commitment to research and development with greater investment in research and innovation, both in personnel and capabilities. To support the cutting-edge efforts of our researchers and engineers, in 2016 we opened our new, state-of-the-art Research and Innovation Center in Middletown, Ohio.

Carbon Steel

We sell flat-rolled carbon steel products, consisting of premium-quality coated, cold-rolled, and hot-rolled carbon steel products, primarily to automotive manufacturers and their suppliers, as well as to customers in the infrastructure and manufacturing market. The infrastructure and manufacturing market primarily includes electrical transmission, heating, ventilation and air conditioning equipment, and appliances. We also sell carbon steel products to distributors, service centers and converters, who may further process these products before reselling them. Our goal is to carry appropriate inventory levels that will meet our customers’ needs,We are particularly focused on AHSS for the “just-in-time” delivery requirements necessaryautomotive market, and we produce virtually every AHSS grade that our customers currently need. Our automotive customers have incorporated into their products our AHSS grades, such as Dual Phase 780 and 980, for both stamped and roll-formed parts. In addition, we are currently the only domestic steel company that is marketing a groundbreaking third-generation AHSS product, which has unparalleled strength and formability attributes that may give automotive manufacturers unique opportunities for designing future vehicle platforms.

Looking forward, we have developed the next generation of AHSS with even greater strength and formability, and we believe that our addition of Precision Partners dramatically accelerates our efforts to service the demanding automotive market. Our strategy is to target markets fordrive adoption of our innovative steel products by automotive manufacturers and their Tier 1 suppliers. Our research and technical experts, along with Precision Partners’ engineers, have already begun numerous collaboration projects aimed at achieving this goal, as Precision Partners’ expertise in tool design and stamping capabilities has allowed us to deliver to customers fully formed prototypes of automotive components utilizing our innovative steel products. As such, we are now able to provide true component solutions through prototype automotive parts, rather than attempting to showcase our advanced steels to customers through computer models and flat-rolled steel samples, as in the past. This approach has and will continue to demonstrate to customers that deliver higher margins, where possible,they can significantly lightweight automotive parts on an accelerated timeline and reduce amounts sold into the lower margin steel spot markets, which has experienced substantial volatility in pricing over the past several years primarily as a result of the impact of low-priced imports of foreign steel. In late 2015, we temporarily idled the blast furnace and steelmaking operations (the “Hot End”) atcost-effective manner by using our Ashland Works in Kentucky. The Ashland Works Hot End remains temporarily idled due to continuing uncertaintyhigh-strength, highly formable grades of steel market conditions (includingin place of traditional lower-strength grades. In addition, these collaborative projects are enhancing Precision Partners’ knowledge and experience in tool design and build, and stamping of new, advanced grades of steel, enabling it to provide expert solutions to automotive customers now and in the longer-term outlook for import levels) and our ability to earn an appropriate return on its operations. In 2016, we increased capacity utilization of our carbon steelmaking operations at our Middletown Works in Ohio (“Middletown Works”) and Dearborn Works, and we reduced our production of commodity carbon, electrical and stainless steel products. Also in 2016, we enhanced asset and resource utilization to reduce operating costs and modified production capacity for higher margin carbon, electrical and stainless steel grades at all locations. See Automotive Market and Carbon Steel Spot Market for more information.

Stainless steelsfuture.

We sell our stainless steel products to manufacturers and their suppliers in the automotive industry, to manufacturers of food handling, chemical processing, pollution control, medical and health equipment, and to distributors and service centers. For stainless steels, as well as carbon steels, we target customers who require the highest quality flat-rolled steel with precise “just-in-time” delivery and technical support. Our enhanced product quality and delivery capabilities, as well as our emphasis on collaborative customer technical support and product planning, are critical factors in our ability to serve these markets. See the Specialty StainlessPress-Hardenable Steel Market section for more information.

Electrical steels

We sellcontinue to develop innovative press-hardenable steel (“PHS”) products for hot-stamping applications that achieve lightweighting solutions for our electricalcustomers. Our ULTRALUME® PHS is an aluminized Type 1 heat-treatable boron steel products in the infrastructure and manufacturing market, primarilyour customers depend on when they require high-strength parts with complex geometries. These steels enable automotive manufacturers to manufacturers of power transmission and distribution transformers, both for new and replacement installation. We also sell electrical steel products to manufacturers ofreduce vehicle
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weight while continuing to keep pace with critical safety requirements. In addition, our acquisition of Precision Partners, which provides hot-stamping and advanced-engineered solutions and tool design and build solutions to automotive customers, strategically advances our mission to innovate in the high-growth automotive lightweighting space and helps enhance our position in hot-stamping technology.

Third-Generation Advanced High-Strength Steel

We continue to push our innovation efforts toward groundbreaking steel technologies. Our NEXMET™ 440EX product is intended for automotive manufacturers to use in surface-critical, exposed auto body panels. We introduced our NEXMET 1000 and NEXMET 1200 AHSS products to enable our customers to achieve significant lightweighting in their automobiles’ unexposed structural components. NEXMET 1200, for example, has better global formability than conventional dual phase 600 steel, at twice the strength level. These AHSS products allow automotive engineers to design lightweight parts that meet rigorous service and safety requirements. We supplied demonstration samples of coated NEXMET 1000 and NEXMET 1200 AHSS products to numerous automotive customers in 2017 as a key step in the material qualification process. The NEXMET family of steels helps our customers achieve vehicle weight savings for ambitious fuel efficiency standards while avoiding significant capital costs required to re-design production facilities to use alternative materials in their vehicles. We introduced these solutions after completing a strategically vital upgrade of our state-of-the-art continuous galvanizing line at our Dearborn Works facility. Enhanced furnace technology and modifications to the line’s configuration expanded the line’s capabilities to enable it to also operate as a continuous anneal line.

We believe the combination of Precision Partners’ cold-stamping and advanced die-making capabilities, AK Tube LLC’s (“AK Tube”) advanced tubemaking capabilities and AK Steel’s new product introductions will enhance our ability to deliver innovative, lightweighting solutions for our customers. We anticipate that 3rd Gen AHSS products with high strength and formability will enable automotive manufacturers opportunities to stamp and form lightweight parts using traditional manufacturing methods, at a lower cost than aluminum or other materials.

Our innovation initiatives include collaborations with other companies, such as The NanoSteel Company. During 2016, we delivered NanoSteel® NXG™ 1200, a third-generation, advanced high-strength steel (“3rd Gen AHSS”), to several automotive manufacturers for testing and evaluation. This 3rd Gen AHSS solution, produced at our facilities using proprietary production methods, possesses a unique combination of high ultimate tensile strength and high material formability that we believe represents a leap in performance over many other AHSS products.

Specialty Stainless and Electrical Steel

We continue to develop new and improved specialty stainless and electrical motorssteels for expanding applications in the automotive, infrastructure and generators.manufacturing, and other markets. We targetare working with our automotive customers and their exhaust system suppliers to develop new stainless steels for exhaust systems that must support engines running at higher temperatures that are needed to achieve increased fuel economy. Our new steels’ capabilities demonstrate improved thermal fatigue and corrosion resistance. We are also developing innovative solutions for customers in other markets. For example, we are developing steels with specialized finishes and colors to provide differentiation and cost savings solutions for our customers in the architectural and appliance markets.

We are a global leader in producing the highest-quality electrical steel products, and our electrical steels are among the most energy efficient in the world. We sell our electrical steel products, which are iron-silicon alloys with unique magnetic properties, primarily to manufacturers of power transmission and distribution transformers and electrical motors and generators, in the infrastructure and manufacturing markets. These customers who desire the highest quality iron-silicon alloyshighest-quality electrical steels that provide the low core loss and high permeability required for more efficient and economical electrical transformers. Our electrical steels are among the most energy efficient in the world. As with customerstransformers, which help to lower costs of our other steel products, we provide our electrical steel customers outstanding technical support and product development assistance. See Electrical Steel Market section for more information.

Markets

For our carbon steel, stainless steel and electrical steel products, we intentionally limit our participation in the commodity portions of those markets, where attributes such as high quality, technical support and innovation are less valued and where selling prices and product margins are generally lower.

Because of our focus on shipments to the automotive industry and our decision to ship fewer tons to the spot market, Ford Motor Company and FCA US LLC accounted for 12% and 11% of our net sales in 2016, and 12% and 11% of our net sales in 2015. No customer accounted for more than 10% of our net sales in 2014. The following table presents the percentage of our net sales to each of our primary markets:
Market 2016 2015 2014
Automotive 66% 60% 53%
Infrastructure and Manufacturing 16% 16% 18%
Distributors and Converters 18% 24% 29%
electricity distribution.

We sellfocus on the high-end of the electrical steel market, as GOES is technically challenging to produce and typically commands a higher selling price than grades of non-oriented electrical steel (“NOES”). We believe the superior efficiency of our carbon steelGOES products principallyis attractive to customers in markets with increasing efficiency standards, such as Europe and the United States. We sell our electrical and stainless steel products both domestically and internationally. Our customer base is geographically diverse and there is no single country outside the United States where our sales are material compared to our total net sales. We do not have any material long-lived assets located outside the United States. The following shows net sales by geographic area and as a percentage of worldwide net sales:
  2016 2015 2014
Geographic Area Net Sales % Net Sales % Net Sales %
United States $5,226.9
 89% $5,837.2
 87% $5,750.3
 88%
Foreign countries 655.6
 11% 855.7
 13% 755.4
 12%
Total $5,882.5
 100% $6,692.9
 100% $6,505.7
 100%

We sold approximately 70% of our flat-rolled steel shipments in 2016 under fixed base price contracts. Some of these contracts have a surcharge mechanism that passes through certain changes in input costs. These contracts are typically for one year and expire at various times throughout the year. We sold the remainder of our shipments in 2016 into the spot market at market prices or under contracts that have pricing typically linked to a steel index that triggers a price adjustment based on the previous monthly or quarterly reference point.

The automotive market is an important element of our business and growth strategy and, therefore, North American light vehicle production has a significant impact on our total sales and shipments. In 2016, North American automotive manufacturers experienced a record year with light vehicle production of approximately 17.8 million units, representing a 2% increase from the prior year. The improvement in the automotive market and our increased share of that market resulted in higher sales and shipments of our steel to the automotive market in 2016. Most automotive manufacturers are currently predicting a slight decline in total North American light vehicle production volumes for 2017 compared to 2016, though this level of production would still be considered robust compared to historical volumes.

In 2016, housing startsMay 2017, the U.S. Department of Energy (“DOE”) selected AK Steel to receive an award under the Advanced Manufacturing Office’s Next Generation Electric Machines program to develop the next generation of advanced NOES for motors used in a wide variety of industrial and automotive applications. The three-year project will be conducted in collaboration with the United States improved approximately 5% over 2015, which generally increasedDOE, Oak Ridge National Laboratory’s Power Electronics and Electric Machinery Research Center, and Regal Beloit Corporation, a leading manufacturer of electric motors and motion control products. We will receive up to $1.8 to jointly develop an innovative motor design with high-alloy NOES with a goal to achieve an efficiency improvement of more than 30% when compared to existing motor designs. While the demandprogram targets a vast array of industrial motors, pumps and generators, we intend to use the research from this project in NOES applications for products from power transmission and distribution transformer manufacturers, to whomH/EVs since they represent one of the fastest growing markets for NOES. This could be a transformational step forward if we sell electrical steels. Toare successful in this project as it would provide a lesser extent, we also experienced higher demand for stainless and carbon steels from appliance manufacturers, manufacturers of heating and air conditioning equipment and others. We saw improvements in higher value electrical steel pricing and demand during 2016, but this was partly offset by lower prices in and lower shipmentssubstantial enhancement to the electrical steel spot markets as a resultrange of a high level of commodity steel imports into the United States. Electrical steel sales and shipments to customers in foreign countries also have been negatively affected by excess global production capacity and what we believe to be preferential trade practices by certain countries that make our products more expensive to sell in those countries.battery electric vehicles.

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Sustainability

We are committed to operating in a sustainable manner. Beyond ensuring that we are acting responsibly to serve our communities and the environment, operating AK Steel sustainably also provides us opportunities to grow our business, increase customer collaboration and loyalty, attract, retain and motivate employees, and differentiate us from our steel and non-steel competitors. Steel is the most recycled material on the planet—more than aluminum, plastic, paper and glass combined each year—which provides a strong foundation for our sustainability efforts across the company.

Safety

The safety of our employees is a core value for us. Our occupational health and safety policies and programs are the cornerstone of our operating philosophy and are integrated into all of our daily operations and activities. We rigorously manage, control and focus on eliminating or minimizing potential exposure to the hazards associated with making and working with steel. Our low recordable injury rate, based on U.S. Occupational Safety and Health Administration (“OSHA”) criteria, reflects our effectiveness in protecting our employees. In 2017, three of our facilities operated with zero OSHA recordable injuries for the entire year, and five of our facilities operated with zero OSHA recordable injuries during the fourth quarter. We also consistently lead the U.S. steel industry in safety, outperforming the steel industry average injury frequencies for each of the last ten years, and we have received numerous awards recognizing our safety performance. For example, in 2017 our Coshocton Works and Zanesville Works both received the “Special Award for Safety” from the Ohio Bureau of Workers’ Compensation, division of Safety and Hygiene (“Ohio BWC”), recognizing more than 500,000 hours and at least six months without an injury resulting in a day or more away from work. In 2017, Zanesville Works also received the Ohio BWC’s “100% Award,” recognizing zero injuries or illnesses resulting in a day or more away from work during the previous year. Our 2017 performance at our steelmaking facilities (year-to-date through the third quarter, which is the latest industry information currently available), measured as the number of OSHA recordable injuries per 200,000 labor hours, was 0.34, which was more than four times better than the industry average. This 2017 performance was also an improvement over our 2016 OSHA recordable injury rate of 0.44 per 200,000 labor hours, which again led the domestic steel industry during that year.

Environmental Responsibility

We maintain an unwavering commitment to responsible environmental performance throughout our operations. In 2017 we experienced another year of outstanding environmental performance overall, as well as setting records at several of our individual facilities. Under the Clean Water Act, our steelmaking facilities recorded only two water discharge permit exceedances in 2017, which we believe was an all-time low for us. Under the Clean Air Act, in 2017 we recorded our lowest total number of Title V air permit deviations in the last five years. We are particularly proud of the achievements that we have made to improve the air permit performance of Dearborn Works since our acquisition. In 2013, the last year that Dearborn Works was operated under its former ownership and not AK Steel, it experienced over 24,000 air permit deviations. In 2017, the third full year of AK Steel’s ownership of Dearborn Works, it experienced only ten deviations. Although we strive for zero deviations at all of our facilities, this performance represents over a 99.9% improvement for air permit performance at Dearborn Works since we acquired the plant.

We believe that our strong environmental performance is a direct result of the proactive approach we take to environmental management and the close collaborative efforts that we undertake across the company. We target sustainable performance in all aspects of our operations, including continuous improvement in operations that include air, water and waste management. Our comprehensive environmental policy provides that we will:

commit the necessary resources to comply with all applicable environmental laws, regulations, permits and agreements applicable to us;
reduce environmental risks through operating practices and emergency preparedness programs;
encourage recycling, recovery and reuse of residual materials, as well as the reduction and prevention of emissions and releases when feasible;
participate in efforts to develop and implement environmental laws and regulations;
continually evaluate compliance with applicable environmental laws and regulations; and
strive for continually improving the effectiveness of our environmental management efforts.

Certain production units in our operations are inherently water-intensive. However, we continuously seek opportunities to reduce water usage and increase water reuse at our steelmaking plants. In addition, our steelmaking facilities are located near abundant sources of water and we do not believe that any of those operations are located in regions that experience high water stress.

The International Organization for Standardization (“ISO”) has certified all of our steelmaking plants with ISO 14001 environmental management certification, and our environmental affairs professionals oversee environmental compliance throughout our organization. We also invest heavily in equipment to help meet our environmental objectives. For example, in 2017, we spent $129.5 to operate and maintain our environmental controls and invested $6.8 in environmental projects.
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Strategic Opportunities Related to Climate Change

Our strategy of creating new innovative steels and improving existing products enables us to contribute to carbon reduction efforts and the achievement of sustainability goals down the product supply chain. Innovative products in each of the carbon, stainless, electrical and tubular steel families further the sustainability goals of many of our customers. For example, in the automotive market our customers are benefiting from our carbon lightweighting solutions to meet their heightened fuel economy targets under the CAFE standards. We are also providing customers with stainless steel and tubular solutions that allow for greater heat resistance in vehicle exhaust systems, enabling exhaust systems to handle the higher engine exhaust temperatures needed for increased fuel economy. In addition, we continue to develop higher-efficiency NOES products for use in future H/EVs and GOES products for their required infrastructure, a market that we anticipate will grow over time. Our steels also contribute to sustainability goals beyond the automotive market. For instance, our GOES products are among the highest-efficiency electrical steels in the world. These GOES products provide low core loss and high permeability to move electricity across electrical grids in the U.S. and around the world more efficiently through better-performing electrical transformers.

While greenhouse gas emissions are a natural byproduct of steel manufacturing today, we continue to take steps to increase energy efficiency while remaining competitive in the global steel marketplace. For example, through the American Iron and Steel Institute (“AISI”), we participate in the DOE’s Climate VISION agreement. This program assists domestic steelmakers in their continued efforts to lead the global steel sector in voluntary emissions reductions. We are also a member of the federal ENERGY STAR program, which identifies and promotes energy-efficient products to help reduce greenhouse gas emissions. ENERGY STAR is a joint program of the EPA and DOE, helping businesses and consumers save money and protect the environment through energy-efficient products and practices. As with other companies engaged in the production of steel, certain aspects of our production process are carbon-intensive and current technology does not currently afford us the ability to dramatically lower our direct greenhouse gas emissions without significantly reducing the scope of our operations. However, we and other steel producers in the United States are actively participating in research and development to develop technology, processes and approaches to reduce emissions during the steelmaking processes, but these developments are likely to occur over the longer term.

In addition, the production phase of steelmaking is less carbon-intensive than the processes for producing certain other competing materials, such as aluminum. Thus, while the CAFE standards have motivated the use of aluminum in some vehicles to help achieve lightweighting goals, we intend to continue to educate governments, the automotive industry and other key stakeholders that steel is the most sustainable metal to reduce greenhouse gas emissions through the life cycle of a vehicle. These benefits are even greater for customers utilizing our advanced steel products for lightweighting.

Production Resources

Employees

Approximately 5,700 of our 9,200 employees are represented by labor unions. The labor contracts covering these represented employees expire between 2018 and 2021. See the discussion under Labor Agreements in Item 7 for additional information on these agreements.

Raw Materials and Other Inputs

Our steel manufacturing operations require iron ore,carbon and stainless steel scrap, coal, coke, chrome, iron ore, nickel zinc, carbon steel scrap and stainless steel scrapzinc as primary raw materials. We also use large volumes of natural gas, electricity, electrodes and industrial gases. In past years we have purchased carbon steel slabs from other steel producers to supplement our production from our own steelmaking facilities, but we did not purchase carbon steel slabs in 2016.

We typically purchase carbon and stainless steel scrap, natural gas, a substantial portion of our electricity and most other raw materials at prevailing market prices, which may fluctuate with market supply and demand. However, we make most of our purchases of iron ore, coke, industrial gases and a portion of our electricity at negotiated prices under annual or multi-year agreements with periodic price adjustments. We purchase substantially all our iron ore from one supplier under multi-year contracts. We typically purchase most of our metallurgical coal under annual fixed-price agreements.agreements, but we also obtain approximately 15% of our metallurgical coal needs from our own mine at AK Coal Resources, Inc. (“AK Coal”). Additionally, we may hedge portions of our energy and raw materials purchases to reduce volatility. During late 2016, we terminated our iron ore pellet offtake agreement with Magnetation LLC (“Magnetation”),volatility and risk, which caused our iron ore derivatives to no longer meet the accounting criteria for hedge accounting treatment. As a result, we now account for those derivatives on a mark-to-market basis with immediate recognition of changesis discussed in the fair value of the derivative contractsmore detail in earnings when the change occurs, instead of when we recognize the underlying cost of iron ore, thus potentially increasing the volatility of our results of operations. This volatility does not affect the ultimate gains or losses on the derivative contracts we will recognizeQuantitative and Qualitative Disclosures about Market Risk in the financial statements, but only the timing of recognition.Item 7A.

We also attempt to reduce the risk of future supply shortages and price volatility in other ways. If multi-year contracts are available in the marketplace, we may use these contracts to secure enough supply to satisfy our key raw material needs. When multi-year contracts are not available, or are not available on acceptable terms, we enter into annual contracts or make spot purchases to meetpurchase the remainder of our raw materials needs.needs under annual contracts or make spot purchases. We also regularly evaluate using alternative sources and substitute materials.

We believe that we have secured, or will be able to secure, adequate supply sources for our raw materials and energy requirements for 2017 and for at least the next three to five years. However, our raw material suppliers may experience production disruptions, which could create shortages of raw materials in 2017 or later.2018.

Research and Innovation

Research and innovation is deeply ingrained in our history and is one of the key focus areas of our company. Differentiating ourselves by providing new, innovative products is a strategic priority, as we believe such differentiation in higher value carbon, stainless and electrical steels to meet challenging applications enables us to maintain and enhance our margins by providing customers with breakthrough solutions. We conduct a broad range of research and development activities aimed at improving existing products and manufacturing processes and developing new products and processes. In recent years, we have increased our focus and spending on new product innovation. In the carbon steel market, we are particularly focused on advanced high-strength steels (“AHSS”) for the automotive market. We produce virtually every grade of AHSS that our customers currently need, but our goal is to develop the next generation of AHSS with even greater formability. In the electrical steel market, our research efforts are aimed at developing the highest-efficiency steels in the world for use in power transmission and distribution transformers. In addition, we are focused on achieving new breakthroughs in electrical motors and generators for use in the next generations of hybrid and electric vehicles. In the stainless steel market, we are developing more high-temperature, corrosion-resistant steels for a variety of applications, including vehicle exhaust systems that can accommodate hotter-burning engines for increased fuel efficiency.

Developing new steel products and steel processes has been our legacy and we have recently reinvigorated our focus on research and innovation. At the end of 2016, we moved into our new Research and Innovation Center in Middletown, Ohio. The facility includes pilot lines and features new operational simulators that replicate critical steel manufacturing operations to allow our researchers, scientists and engineers to continue their leading-edge research, applications engineering, advanced engineering, product development and customer technical services.

Also during 2016, we implemented new process technology to produce both coated and cold-rolled Next-Generation AHSS (NEXMET™ AHSS) on the hot-dip galvanizing line at Dearborn Works. Our goal is to provide NEXMET AHSS trial material to our customers in early 2017 for evaluation and qualification. Looking beyond, we continue to push our innovation efforts toward groundbreaking steel technologies, including advances in Third-Generation AHSS (see Innovation and Product Development in Item 7). We have significantly increased our investment in research and innovation during the past three years from $17.5 in 2014 to $28.3 in 2016 for normal ongoing activities, in addition to our new Research and Innovation Center.

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Employees

At December 31, 2016, we employed approximately 8,500 people, of which approximately 6,100 are represented by labor unions. The labor contracts covering these represented employees expire between 2017 and 2019. See the discussion under Labor Agreements in Item 7 for additional information on these agreements.

Competition

We principally compete with domestic and foreign producers of flat-rolled carbon, stainless and electrical steel, carbon and stainless tubular product producers (both integrated steel producers and mini-mill producers) and producers of plastics,products, aluminum, carbon fiber, concrete and other materials that may be used as a substitute for flat-rolled steels in manufactured products. Mini-mills generally offerWith the acquisition of Precision Partners, we also compete against other tooling and stamping companies in a narrower range of products than integrated steel mills, but have been expanding their product capabilities in recent years. In addition, mini-mills have some competitive cost advantages as a result of their different production processes and lower labor costs associated with what are often non-union workforces. highly fragmented market.

Price, quality, on-time delivery, customer service and product innovation are the primary competitive factors in the steel industry and vary in importance according to the product category and customer requirements.

Steel producers that sell to the automotive market are facing increasing competition from aluminum manufacturers (and, to a lesser extent, other materials) as automotive manufacturers attempt to develop vehicles that will enable them to satisfy more stringent, government-imposed fuel efficiency standards. To address automotive manufacturers’ lightweighting needs that the aluminum industry is targeting, we and others in the steel industry continue to developare developing AHSS grades of AHSS that we believe provide similar weight savings require minimal capital investments by customers, and aresimilar to aluminum, while being stronger, less costly, more sustainable, easier to repair and more environmentally friendlyfriendly. In addition, our automotive customers who continue to use steel, as opposed to aluminum and other alternative materials, are able to forego the significant capital expenditures required to re-tool their manufacturing process in order for their operations to accommodate the use of non-steel materials.

Mini-mills generally offer a narrower range of products than aluminum.integrated steel mills, but have been expanding their product capabilities in recent years. In addition, mini-mills have some competitive cost advantages as a result of their different production processes and lower labor costs associated with what are often non-union workforces. However, mini-mills do not have the equipment capabilities to produce all of the products that we offer, nor do they possess our depth of research and development. For example, mini-mills do not strategically target demanding automotive sheet applications for the exposed panels of vehicles, which is one of the technically challenging products in which we specialize.

Domestic steel producers, including us, face significant competition from foreign producers. For many reasons, these foreign producers often are able to sell products in the United StatesU.S. at prices substantially lower than domestic producers. Depending on the country of production, these reasons may include generous government subsidies; lower labor, raw material, energy and regulatory costs; less stringent environmental regulations; less stringent safety requirements; the maintenance of artificially low exchange rates against the U.S. dollar; and preferential trade practices in their home countries. In recent years, the annual level of imports of foreign steel into the United States has increased over historical levels and is affected to varying degrees by the relative level of overcapacity of steel production in thoseChina and other countries, the strength of demand for steel outside the United StatesU.S. and the relative strength or weakness of the U.S. dollar against various foreign currencies.

In 2014 and 2015, the combination of overcapacity and slowing domestic demand in countries such as China resulted in imports of low-priced foreign steel into the United StatesU.S. at levels significantly higher than recent historicalprevious periods. ThisAs the supply of imported steel surged, it caused increaseddramatic downward pressure on the price of flat-rolled steels in the American marketplace. Imports of finished steel into the United States accounted for approximately 26%27%, 29%26% and 28%29% of domestic steel market consumption in 2017, 2016 2015 and 2014,2015, levels that are higher than the historic norm. During 2016, we successfully concluded the anti-dumping (“AD”) and countervailing duty (“CVD”) cases that we and other major domestic steel producers initiated over a year agoin 2015 against imports of corrosion-resistant (“Coated”), cold-rolled and hot-rolled carbon steel products from multiple foreign countries. Also during 2016, the International Trade Commission (“ITC”) issued the last of its final determinations that the domestic steel industry has been materially injured by imports of these steel products from the countries named in the petitions. As a result, theThe final duties determined by the United States Department of Commerce (“Commerce Department”), which in some cases exceed 400% for combined AD and CVD duties, will remain in effect for a minimum of five years.

Following those determinations, in SeptemberSeptember 2016, we and other domestic producers made filings with the Commerce Department asserting that Chinese steel producers are attempting to circumvent the AD and CVD duties against corrosion-resistantCoated and cold-rolled carbon steel by transshipping Chinese steel through Vietnam for minor processing before importing these final steel products into the U.S. market. Our filings request thatOn December 5, 2017, the Commerce Department findannounced preliminary affirmative rulings that imports of Vietnamese corrosion-resistantCoated and cold-rolled carbon steel imported from Vietnam produced from steel that originated in China be subjected to the sameis circumventing existing AD and CVD duties of shipments of those steelorders on these products imported directly from China. The Commerce Department announcedinstructed the initiationU.S. Customs and Border Protection to begin collecting cash deposits on all imports of these investigationsCoated and cold-rolled carbon steel produced in November 2016. See Trade Cases in Note 10 to the consolidated financial statements for more information.Vietnam using Chinese-origin steel.

In addition, during the first quarter of 2017, pursuant to trade cases that we and other domestic producers of stainless steel initiated, the Commerce Department assessed final duties against Chinese stainless steel imports, which in some cases exceed 265% for combined AD and CVD duties. These duties will remain in effect for a minimum of five years.

We continue to provide pension and healthcarehealthcare benefits to a great number of our retirees, resulting in a competitive disadvantage compared to certain other domestic integratedand foreign steel companies and mini-millsproducers that do not provide such benefits to any or most of their retirees. However, we have taken a number of actions to reduce pension and healthcare benefits costs, including negotiating progressive labor agreements that have significantly reduced total employment costs at all of our union-represented facilities, transferring all responsibility for healthcare benefits for various groups of retirees to Voluntary Employee Benefits Association trusts, offering voluntary lump-sum settlements to pension plan participants and lowering retiree benefit costs for salaried employees. During 2016, we purchased two non-participating annuity contracts from a highly rated insurance company and transferred to it pension obligations of $210.3 for certain retirees or their beneficiaries receiving pension payments. In total, we transferred the obligations for approximately 10,000 retirees or their beneficiaries to the insurance company in exchange for a similar amount of pension trust assets.
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offering voluntary lump-sum settlements to pension plan participants, lowering retiree benefit costs for salaried employees, and transferring pension obligations to a highly rated insurance company. These actions have increasednot only reduced some of the risks associated with our abilitypension fund obligations, but more importantly have reduced our risk exposure to compete in the highly competitive global steel market over the long term and wefinancial markets that drive pension funding requirements. We continue to actively seek opportunities to reduce pension and healthcare benefits costs.

Environmental

Information about our environmental compliance, remediation and proceedings is included in the Environmental Contingencies section of Note 10 to the consolidated financial statements in Item 8 and is incorporated herein by reference.

Executive Officers of the Registrant

The following table provides the name, age and principal position of each of our executive officers as of February 15, 2017:9, 2018:
Name Age Position
Roger K. Newport 5253 Chief Executive Officer
Kirk W. Reich 4849 President and Chief Operating Officer
Joseph C. Alter 3940 Vice President, General Counsel and Corporate Secretary
Brian K. Bishop 4546 Vice President, Carbon Steel Operations
Stephanie S. Bisselberg 4647 Vice President, Human Resources
Renee S. Filiatraut 5354 Vice President, Litigation, Labor and External Affairs
Gregory A. Hoffbauer 5051 Vice President, Controller and Chief Accounting Officer
Michael A. Kercsmar 4546 Vice President, Specialty Steel Operations
Scott M. Lauschke 4748 Vice President, Sales and Customer Service
Eric S. Petersen 4748 Vice President, Research and Innovation
Maurice A. Reed 5455 Vice President, Engineering, Raw Materials and Energy
Christopher J. Ross50Vice President and Treasurer
Jaime Vasquez 5455 Vice President, Finance and Chief Financial Officer

Roger K. Newport has served as Chief Executive Officer since January 2016. Prior to that, Mr. Newport served as Executive Vice President, Finance and Chief Financial Officer since May 2015. Prior to that, Mr. Newport served as Senior Vice President, Finance and Chief Financial Officer since May 2014, and as Vice President, Finance and Chief Financial Officer since May 2012 and as Vice President, Business Planning and Development since June 2010.2012. Prior to that, Mr. Newport served in a variety of other capacities since joining us in 1985, including Vice President—Business Planning and Development, Controller and Chief Accounting Officer, Assistant Treasurer, Investor Relations, Manager—Financial Planning and Analysis, Product Manager, Senior Product Specialist and Senior Auditor.

Kirk W. Reich has served as President and Chief Operating Officer since January 2016. Prior to that, Mr. Reich served as Executive Vice President, Manufacturing since May 2015. Before assuming that role, Mr. Reich served as Senior Vice President, Manufacturing since May 2014, and as Vice President, Procurement and Supply Chain Management since May 2012 and as Vice President, Specialty Steel Operations since June 2010.2012. Prior to that, Mr. Reich served in a variety of other capacities since joining us in 1989, including Vice President—Specialty Steel Operations, General Manager—Middletown Works, Manager—Mobile Maintenance/Maintenance Technology, General Manager—Mansfield Works, Manager—Processing and Shipping, Technical Manager, Process Manager and Civil Engineer.

Joseph C. Alter has served as Vice President, General Counsel and Corporate Secretary since May 2015. Prior to that, Mr. Alter served as Vice President, General Counsel and Chief Compliance Officer since May 2014 and Assistant General Counsel, Corporate and Chief Compliance Officer since December 2012. Since joining us in 2009, Mr. Alter becameserved as Corporate Counsel and Chief Compliance Officer in May 2011. Beforeand as Corporate Counsel. Prior to joining us, as Corporate Counsel in August 2009, Mr. Alter was Corporate Counsel at Convergys Corporation and before that, an attorney with the law firm of Keating Muething & Klekamp PLL.

Brian K. Bishop has served as Vice President, Carbon Steel Operations since March 2016. Prior to that, Mr. Bishop served as Director, Carbon Steel Operations since July 2015 and General Manager, Dearborn Works since September 2014. Prior to that, Mr. Bishop was General Manager—Maintenance, Repair and Operations Purchasing since May 2013 and General Manager, Middletown Works since June 2010. Since joining us in 1995, Mr. Bishop progressed through a number of positions, including General Manager—Mansfield Works, Manager—Occupational Safety and Health and Shift Manager at Middletown Works.

Stephanie S. Bisselberg has served as Vice President, Human Resources since April 2013. Prior to that, Ms. Bisselberg served as Assistant General Counsel, Labor from October 2010. She also served as Labor Counsel and Assistant Labor Counsel since joining us in 2004. Prior to joining us, Ms. Bisselberg was an attorney with the law firm of Taft, Stettinius and Hollister LLP.

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Renee S. Filiatraut has served as Vice President, Litigation, Labor and External Affairs since May 2014. Prior to that, Ms. Filiatraut served as Assistant General Counsel, Litigation since December 2012. Before joining us as Litigation Counsel in March 2011, Ms. Filiatraut was a Partner with Thompson Hine LLP from January 1998.LLP.
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Gregory A. Hoffbauer has served as Vice President, Controller and Chief Accounting Officer since January 2016. Prior to that, Mr. Hoffbauer served as Controller and Chief Accounting Officer since February 2013. Before joining us as Assistant Controller in January 2011, Mr. Hoffbauer was Director of Accounting with NewPage Corporation. Mr. Hoffbauer also was Controller for Day International, Inc. and served in a number of increasingly responsible accounting and auditing positions for Deloitte & Touche LLP, including Audit Senior Manager.

Michael A. Kercsmar has served as Vice President, Specialty Steel Operations since March 2016. Prior to that, Mr. Kercsmar served as Director, Specialty Steel Operations since July 2015 and General Manager, Coshocton Works and Zanesville Works since June 2013. Prior to that, Mr. Kercsmar served as General Manager, Mansfield Works since June 2010. Mr. Kercsmar served in a number of roles since joining us in 1997, including Manager—Occupational Safety and Health at Middletown Works, Department Manager—South Coating, and Shift Manager in the cold strip mill at Middletown Works .Works.

Scott M. Lauschke has served as Vice President, Sales and Customer Service since February 2015. Before joining us, Mr. Lauschke was Vice President and General Manager of AFGlobal Corporation from July 2013 through November 2014. Before that, Mr. Lauschke served in various roles of increasing responsibility at The Timken Company from October 1997, including General Sales Manager from May 2009 through April 2013.

Eric S. Petersen has served as Vice President, Research and Innovation since February 2015. Prior to that, Mr. Petersen was Vice President, Sales and Customer Service since July 2013 and Director, Specialty and International Sales since November 2012 and Director, Research and Innovation since June 2010.2012. Prior to that, Mr. Petersen served in a variety of other capacities since joining us in 1991, including Director, Director—Research and Innovation, Director—Customer Technical Services and Research;Research, General Manager, Manager—Quality Assurance;Assurance, General Manager, Manager—Carbon Steel Technology;Technology, General Manager, Manager—Rockport Works;Works, Manager of various departments at Rockport Works and Middletown Works; Quality Control and Operations Management positions and Associate Process Engineer, Associate Metallurgist and Assistant Metallurgist at Middletown Works.

Maurice A. Reed has served as Vice President, Engineering, Raw Materials and Energy since May 2012. Prior to that, Mr. Reed was Director, Engineering and Raw Materials from March 2011. Prior to that, Mr. Reed served in a variety of other capacities since joining us in 1996, including Director of Director—Engineering and Raw Materials, Director—Engineering and Energy, General Manager—Engineering, Operations Support and Primary Process Research and General Manager—Engineering. Before joining us, Mr. Reed held a number of increasingly responsible engineering technology positions for National Steel Corporation.

Christopher J. Ross has served as Vice President and Treasurer since January 2018. Prior to that, Mr. Ross was Treasurer since February 2016 and General Manager, Cash Management and Finance since August 2012. Mr. Ross served in a number of roles since joining us in 1997, including General Manager—Strategic Planning and Financial Analysis, General Manager—Investor Relations and Diversified Business Group, Assistant Treasurer, Manager—Investor Relations, Product Manager—Hot Dip Galvanized and Electrogalvanized, Senior Accountant—Financial Planning and Analysis and Cost Accountant at Middletown Works.

Jaime Vasquez has served as Vice President, Finance and Chief Financial Officer since January 2016. Before joining us in September 2014 as Director, Finance, Mr. Vasquez held several positions with Carpenter Technology Corporation, including Vice President, Chief Financial Officer for the Performance Engineered Products Group from October 2013; Vice President, Corporate Development from July 2011; President, Asia Pacific; and Vice President, Treasurer and Investor Relations.

Available Information

We maintain a website at www.aksteel.com. Information about us is available on the website free of charge, including our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934. Such information is posted to the website as soon as reasonably practicable after submission to the Securities and Exchange Commission. Information on our website is not incorporated by reference into this report.

Item 1A.Risk Factors.

We caution readers that our business activities involve risks and uncertainties that could cause actual results to differ materially from those we currently expect. While the items listed below represent the most significant risks to us, we regularly monitor and report risks to the Board of Directors through a formal Total Enterprise Risk Management program.

Risk of reduced selling prices, shipments and profits associated with a highly competitive and cyclical industry. The competitive landscape in the steel industry reflects an improved domestic economy; shifting domestic and international political priorities;priorities, an uncertain global trade landscape;landscape, and continued intense competition from domestic steel competitors; and foreign steel competition, both domestically (much of which we believe has been through unfair trade practices) and abroad.competitors. These conditions directly impact our
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pricing. It is impossible to predict whether the domestic and/or global economies or industry sectors of those economies that are key to our sales will continue to improve and generate enough demand to absorb some of the existing excess
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capacity in the steel industry, as well as new or expanded capacity. Also, we cannot know how customers or competitors will react to these and other factors and how their actions could affect market dynamics and sales of, and prices for, our products. Market price and demand for steel are very hard to predict and we could be hurt by decreases in either.either or both could adversely impact our sales, financial results and cash flows. In addition, our direct sales to the automotive industry generate approximately 66%65% of our revenue and we make additional sales to distributors and converters whom, we believe, ultimately resell some of that volume to the automotive market. If automotive demand should decline substantially or we lose market share to competitors, our sales, financial results and cash flows could be severely impacted.

Risk of domestic and global steel overcapacity.  Significant global steel capacity and new or expanded production capacity in the United States in recent years has caused and continues to cause capacity to exceed demand globally, as well as in our primary markets in North America, which has and may continue to result in lower prices and shipments of our products. In fact, significant increases in production capacity in the United StatesU.S. by our competitors already have occurred in recent years as new carbon and stainless steelmaking and finishing facilities have begun production. In addition, foreign competitors have substantially increased their production capacity in the last few years and, in some instances appear to have targeted the U.S. market for imports. Also, some foreign economies, such as China, seem to be slowing relative to recent historical norms, resulting in an increased volume of steel products that cannot be consumed by industries in those foreign steel producers’ own countries. These and other factors have contributed to a high level of imports of foreign steel into the United StatesU.S. in recent years compared to historical levels and create a risk of even greater levels of imports, depending upon foreign market and economic conditions, the value of the U.S. dollar relative to other currencies, and other variables beyond our control. A significant further increase in domestic capacity or foreign imports could adversely affect our sales, financial results and cash flows.

Risks related to U.S. government actions on NAFTA and/or other trade agreements, treaties or policies.  The U.S. government has recently indicated its intent to alter its approach to international trade policy and in some cases to renegotiate, or potentially terminate, certain existing bilateral or multi-lateral trade agreements and treaties with foreign countries, including the North American Free Trade Agreement (“NAFTA”). Despite several rounds of negotiation thus far among the NAFTA member countries and other discussions with foreign governments, it remains unclear what the U.S. Administration will or will not do with respect to NAFTA or other international trade agreements, treaties and policies. If the U.S. government takes action to withdraw from or materially modify NAFTA or other international trade agreements, treaties or policies, it has the potential to adversely impact our business, customers and/or suppliers directly by disrupting trade and commercial transactions and/or indirectly by adversely affecting the U.S. economy or certain sectors thereof, thereby impacting demand for our customers’ products, and in turn negatively affecting demand for our products. Key links of the supply chain for some of our key customers, including automotive manufacturers, could be negatively impacted by a withdrawal from or significant change to NAFTA or other international trade agreements. As such, if the U.S. withdraws from or negotiates material modifications to the terms of NAFTA or other significant trade agreements and/or treaties, or makes significant changes to its trade policies, such actions could materially adversely affect our sales, financial results and cash flows.

Risk of changes in the cost of raw materials, supplies and energy.  The price that we pay for energy and key supplies and raw materials, such as electricity, natural gas, industrial gases, graphite electrodes, iron ore, chrome, zinc and coal, can fluctuate significantly based on market factors. In some cases the prices at which we sell steel will not change in tandem with changes in our raw materialmaterials, supplies and energy costs. Global demand and supply, particularly Chinese demand and supply, for certain raw materials can have a significant influence on our costs for those raw materials, especially iron ore and coal.coal, as well as supplies for production whose prices are impacted by raw material prices, such as graphite electrodes and refractory materials. However, our sales prices are generally driven by North American demand, which can compress our margins in cases where raw material costs increase and our sales prices do not move in a similar manner. The majority of our shipments are sold under contracts that do not allow us to pass through all increases in raw materialmaterials, supplies and energy costs. Some of our shipments to contract customers are under contracts withinclude variable-pricing mechanisms allowing us to adjust the total sales price based upon changes in specified raw materialmaterials, supplies and energy costs. Those adjustments, however, rarely reflect all of our underlying raw materialmaterials, supplies and energy cost changes. The scope of the adjustment may be limited by the terms of the negotiated language including limitations on when the adjustment occurs. For shipments made to the spot market, market conditions or timing of sales may not allow us to recover the full amount of an increase in raw material, supplies or energy costs. In such circumstances, a significant increase in raw material, supplies or energy costs likely would adversely impact our financial results and cash flows. Conversely, in certain circumstances, we may not realize all of the benefits fromwhen the price for certain raw material pricematerials, supplies or energy declines. ThisFor example, this can occur when we lock in the price of a raw material over a set period and the spot market price for the material declines during that period. Our need to consume existing inventories may also delay the impact of a change in prices of raw materials prices.or supplies. New inventory may not be purchased until some portion of the existing inventory is consumed. The impact of this risk is particularly significant for iron ore and coke because of the volumes held in inventory. We manage our exposure to the risk of iron ore price increases by hedging a portion of our annual iron ore supply and by entering supply agreements where the IODEX, the global iron ore price index, is only one factor affecting our price of iron ore pellets. The impact of significant fluctuations in the price we pay for raw materials can be increasedexacerbated by our “last-in, first-out” (“LIFO”) accounting method for valuing inventories. Using the LIFO method means that we treat the last coil of steel completed
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as the first one sold, which means that our inventory value can reflect earlier input costs that do not reflect current input costs. The impact of LIFO accounting may be particularly significant in period-to-period comparisons.

Risk from our significant amount of debt and other obligations.  On December 31, 2016,2017, we had $1,845.1$2,165.5 of indebtedness (excluding unamortized discount/premium and debt issuance costs and the capital lease for our Research and Innovation Center) and additional obligations outstanding. We also had pension and other postretirement benefit obligations totaling $1,135.0.$934.3. We haveanticipate approximately $45.0$51.0 of required annual pension contributions for 2017.2018. Based on current funding projections, we expect to make contributions to the master pension trust of approximately $60.0$35.0 for 20182019 and $75.0$10.0 for 2019,2020, though funding projections in 2018for 2019 and beyond could be affected by differences between expected and actual returns on plan assets, actuarial data and assumptions relating to plan participants, the discount rate used to measure the pension obligations and changes to regulatory funding requirements. We can borrow additional amounts under our $1,500.0$1,350.0 revolving credit facility. At December 31, 2016,2017, we had no$450.0 of outstanding borrowings under this credit facility with outstanding letters of credit of $70.7,$71.5, resulting in maximum remaining availability of $1,429.3$828.5 under the credit facility (subject to customary borrowing conditions, including a borrowing base). Borrowing capacity under the credit facility is determined by the value of eligible collateral less outstanding borrowings and letters of credit. At December 31, 2016,2017, borrowing availability under the credit facility was $1,186.4$807.3 based on eligible collateral at that time. Our debt and pension obligations, along with other financial obligations, could have important consequences. For example, itthey could increase our vulnerability to general adverse economic and industry conditions; require a substantial portion of our cash flows to be dedicated to interest payments and debt service, reducing the amount of cash flows available for other purposes, such as working capital, capital expenditures, acquisitions, joint ventures or general corporate purposes; limit our ability to obtain future additional financing; reduce our planning flexibility for,
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or ability to react to, changes in our business and the industry; and place us at a competitive disadvantage with competitors who may have less indebtedness and other obligations or greater access to financing.

Risk of severe financial hardship or bankruptcy of one or more of our major customers or key suppliers.  Sales and operations of a majority of our customers are sensitive to general economic conditions, especially as they affect the North American automotive and housing industries. If there is a significant weakening of current economic conditions, whether because of secular or cyclical issues, it could lead to financial difficulties or even bankruptcy filings by our customers. The concentration of customers in a specific industry, such as the automotive industry, may increase our risk because of the likelihood that circumstances may affect multiple customers at the same time. The nature of that impact would likely include lost sales or losses associated with the potential inability to collect all outstanding accounts receivable. Such an event could also negatively impact our financial results and cash flows. In addition, many of our key suppliers, particularly those who supply us with critical raw materials for the steelmaking process, have recently faced severe financial challenges or bankruptcy and other suppliers may face such circumstances in the future. For example, the significant decline in commodity prices during 2015 led to increased economic distress and even bankruptcy filings for several of the domestic sources of metallurgical coal, as well as one of our iron ore suppliers. Also, we purchase substantially all of our iron ore from one supplier under two multi-year contracts. This reliance on a single supplier for a primary raw material may increase our risk of increased costs from substitute suppliers or supply chain disruptions in the event of their financial hardship or bankruptcy. Key suppliers facing financial hardship or operating in bankruptcy could experience operational disruption or even face liquidation, which could result in our inability to secure replacement raw materials on a timely basis, or at all, or cause us to incur increased costs to do so. Such events could adversely impact our operations, financial results and cash flows.

Risk related to our significant proportion of sales to the automotive market. In 2016,2017, approximately 66%65% of our sales were to the automotive market. North American light vehicle production was approximately 17.8 million units in 2016, representing an all-time high. In addition to the size of our exposure to the automotive industry, generally, we face risks related to our relative concentration of sales to certain specific automotive manufacturers. In 2016, Ford Motor Company and FCA US LLC2017, one customer accounted for 12% and 11% of our net sales. Automotive production and sales are cyclical and sensitive to general economic conditions and other factors, including interest rates, consumer credit, and consumer spending and preferences. If automotive production and sales decline, our sales and shipments to the automotive market are likely to decline in a similarly corresponding manner. Adverse impacts that we may sustain as a result include, without limitation, lower margins because of the need to sell our steel to less profitable customers and markets, higher fixed costs from lower steel production if we are unable to sell the same amount of steel to other customers and markets, and/or lower sales, shipments and margins generally as our competitors face similar challenges and compete vigorously in other markets. These adverse impacts would negatively affect our sales, financial results and cash flows. Additionally, the trend toward lightweighting in the automotive industry, which requires lighter gauges of steel at higher strengths, could result in a lower volume of steel required by that industry over time. Moreover, competition for automotive business has intensified in recent periods,years, as steel producers and companies producing alternative materials have focused their efforts on capturing and/or expanding their market share of automotive business because of less favorable conditions in other markets for steel and other metals, including commodity products and steel for use in the oil and gas markets. As a result, the potential exists that we may lose market share to existing or new entrants or that automotive manufacturers will take advantage of the intense competition among potential suppliers to pressure our pricing and margins in order to maintain or expand our market share with them, which could negatively affect our sales, financial results and cash flows.

Risk of reduced demand in key product markets due to competition from aluminum and other alternatives to steel.  The automotive market is important to our business, both in terms of volume and margins. Automotive manufacturers are under pressure to meet increasing government-mandated fuel economy standards through 2025. One major automotive company previously elected to substitute aluminum for carbon steel in the body of some of its vehicles, and may increase using aluminum in others. Other automotiveAutomotive manufacturers have to a lesser degree, begun to incorporate aluminum and other alternative materials into their vehicles and continue to investigate the potential risks and benefits of expanding
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the use of non-steel materials. For example, one major automotive company previously elected to substitute aluminum for carbon steel in the body of some of its vehicles. Although automotive manufacturers have incorporated aluminum and other competing materials at a much slower rate than some experts previously expected, if demand for steel from one or more of our major automotive customers were to significantly decline because of increased use of aluminum or other competing materials in substitution for steel, it likely would negatively affect our sales, financial results and cash flows.

Risks of excess inventory of raw materials.  We have certain raw material supply contracts whichthat include minimum annual purchases, subject to exceptions for force majeure and other circumstances. If our need for a particular raw material is reduced for an extended period significantly below what we projected at the contract’s inception, or what we projected at the time an annual nomination was made under certain contracts, we could be required to purchase quantities of raw materials that exceed our anticipated annual needs. Our decision to temporarily idle the Ashland Works blast furnace and steelmaking operations (“Ashland Works Hot EndEnd”) in 2015 increases this risk, as those operations arewere a major consumer of several key raw materials for which we have take-or-pay obligations, including coke. If our existing supply contracts require us to purchase raw materials in quantities beyond our needs, and if we do not succeed in reaching an agreement with a particular raw material supplier to reduce the quantity of raw materials we purchase from that supplier, then we would likely be required to purchase more of a particular raw material in a given year than we need, negatively affecting our financial results, liquidity and cash flows. Changes in our raw material, finished and semi-finished inventory levels and our LIFO method for valuing inventories could increase the negative impact on our financial results.
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Risk of supply chain disruptions or poor quality of raw materials.materials or supplies. Our sales, financial results and cash flows could be adversely affected by transportation, raw material, energy or energyother key supply disruptions, or poor quality of raw materials, particularly scrap, coal, coke, iron ore and alloys. For example, extreme cold weather conditions in the United Statesmarket for graphite electrodes has tightened significantly as a result of supply-side shortages of certain raw materials used for their production, and Canada can impact shipping on the Great Lakes and could disrupt the delivery of iron oresupply chain has become increasingly challenged. In addition, we may experience supply chain disruptions or increased costs from transportation-related challenges due to us and/new or increase our costs for iron ore. Such disruptionsenhanced regulation, changes to providers’ operations, labor shortages or other factors. Disruptions or quality issues, whether the result of severe financial hardships or bankruptcies of suppliers, natural or man-made disasters, other adverse weather events, or other unforeseen events, could reduce production or increase costs at one or more of our plants and potentially adversely affect customers or markets to which we sell our products. In addition, in January 2017 we transitioned from our long-time third party logistics (“3PL”) provider to a new 3PL supplier. The ongoing transition is a complex endeavor, as it involves the majority of our trucking services, as well as some rail transportation. Any significant disruption or quality issue in any of the areas addressed above would adversely affect our sales, financial results and cash flows.

Risk of production disruption or reduced production levels.  When business conditions permit, we attempt to operate our facilities at production levels that are at or near capacity. High production levels are important to our financial results because they enable us to spread fixed costs over a greater number of production tons. In 2015, we began to implementWe have implemented a strategy to target markets for our products that deliver higher margins, where possible, and reduce amounts sold into the lower margin spot markets. This ongoing strategy relies on our ability to sell higher margin products that overcome the effects of lower production volumes on our fixed costs. If we are unable to sustain this strategy successfully, it would adversely affect our sales, financial results and cash flows. Production disruptions could be caused by unanticipated plant outages or equipment failures, a lack of redundancy for key production assets, or lack of adequate raw materials, energy or other supplies, particularly under circumstances where we lack adequate redundant facilities. Production disruptions could result in significant costs and potential liability to us, as well as negative publicity and damage to our reputation with current or potential customers. In addition, the occurrence of natural or man-made disasters, adverse weather conditions or similar events could significantly disrupt our operations, negatively impact the operations of other companies or contractors we depend upon, or adversely affect customers or markets who buy our products. Any such significant disruption or reduced level of production would adversely affect our sales, financial results and cash flows.

Risks associated with our healthcare obligations.  We provide healthcare coverage to our active employees and to a significant portion of our retirees, as well as certain members of their families. We are self-insured for substantially all of our healthcare coverage. While we have reduced our exposure to rising healthcare costs to a significant degree through cost sharing, cost caps and VEBA trusts, the cost of providing such healthcare coverage may be greater on a relative basis for us than for our competitors because they either provide a lesser level of benefits, require that their participants pay more for their benefits, or do not provide coverage to as broad a group of participants (e.g., they do not provide retiree healthcare benefits). In addition, our costs for retiree healthcare obligations could be affected by fluctuations in interest rates or by federal healthcare legislation.

Risks associated with our pension obligations.  We have a substantial pension obligation that, along with the related pension expense (income) and funding requirements, is directly affected by various changes in assumptions, including the selection of appropriate mortality assumptions and discount rates. These items also are affected by the rate and timing of employee retirements, actual experience compared to actuarial projections and asset returns in the securities markets. Such changes could increase our cost for those obligations, which could have a material adverse effect on our results and ability to meet those obligations. In addition, changes in the law for pension funding could also materially adversely affect our costs and ability to meet our pension obligations. Also, under the method of accounting we use for pension obligation reporting, we recognize into our results of operations, as a “corridor” adjustment, any unrecognized actuarial net gains or losses that exceed 10% of the larger of projected benefit obligations or plan assets. These corridor adjustments are driven mainly by changes in assumptions and by events and circumstances beyond our
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control, primarily changes in interest rates, performance of the financial markets, and mortality and retirement projections. A corridor adjustment, if required after a re-measurement of our pension obligations, historically has been recorded in the fourth quarter of the year, though one may be recorded at any time if an interim remeasurement occurs. A corridor adjustment can have a significant impact on our financial statements in the periodwhen it is recorded,occurs, although theits immediate recognition of the adjustment in that period reduces the impact of unrealized gains or losses on future periods. The recognition of aA corridor charge does not have any immediate impact on our cash flows. We also contribute to multiemployer pension plans according to collective bargaining agreements that cover certain union-represented employees. Participating in these multiemployer plans exposes us to potential liabilities if the multiemployer plan is unable to pay its unfunded obligations or we choose to stop participating in the plan.

Risk of not reaching new labor agreements on a timely basis.  Most of our hourly employees are represented by various labor unions and are covered by collective bargaining agreements with expiration dates between March 20172018 and September 2019. Three2021. Two of those contracts are scheduled to expire in 2017.2018. The labor contract with the International Association of Machinists and Aerospace Workers, Local 1943, which represents approximately 1,725 hourly employees at our Middletown Works located in Middletown, Ohio, expires on March 15, 2018. The labor contract with the United Steel Workers, Local 169,1865, which represents approximately 310305 hourly employees at our MansfieldAshland Works located in Mansfield, Ohio,Ashland, Kentucky, expires on March 31, 2017. The labor contract with the United Auto Workers, Local 600, which represents approximately 1,160 hourly employees at our Dearborn Works located in Dearborn, Michigan, also expires on March 31, 2017. An agreement with the United Auto Workers, Local 3044, which represents approximately 190 production employees at our Rockport Works located in Rockport, Indiana, is scheduled to expire on September 30, 2017. As of January 1, 2016, approximately 140 hourly Rockport Works maintenance employees transferred to our employment from an independent contractor. We have been negotiating with the United Auto Workers for the terms for these employees to be added to the union.2018. We intend to negotiate with these unions to reach new, competitive labor agreements in advance
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of the current expiration dates. We cannot predict, however, when new, competitive labor agreements with the unions will be reached or what the impact of such agreements will be on our operating costs, operating income and cash flows. There is the potential of work stoppages at these locations in 20172018 and beyond if we cannot reach timely agreements in contract negotiations before the contract expirations. If work stoppages occur, they could have a material impact on our operations, financial results and cash flows. For labor contracts at other locations which expire after 2017,2018, a similar risk applies.

Risks associated with major litigation, arbitrations, environmental issues and other contingencies.  We have described several significant legal and environmental proceedings in Note 10 to the consolidated financial statements in Item 8. For environmental issues, changes in application or scope of regulations applicable to us could have significant adverse impacts, including requiring capital expenditures to ensure compliance with the regulations, increased difficulty in obtaining future permits or meeting future permit requirements, incurring costs for emission allowances, restriction of production, and higher prices for certain raw materials. One or more of these adverse developments could negatively impact our operations, financial results and cash flows. For litigation, arbitrations and other legal proceedings, it is not possible to predict with certainty the outcome of such matters and we could incur future judgments, fines or penalties or enter into settlements of lawsuits, arbitrations and claims that could have an adverse effect on our business, results of operations and financial condition. In addition, while we maintain insurance coverage for certain claims, we may not be able to obtain insurance on acceptable terms in the future and, if we obtain such insurance, it may not provide adequate coverage against all claims. We establish reserves based on our assessment of contingencies, including contingencies for claims asserted against us in connection with litigation, arbitrations and environmental issues. Adverse developments in litigation, arbitrations, environmental issues or other legal proceedings may affect our assessment and estimates of the loss contingency recorded as a reserve and require us to make payments in excess of our reserves, which could negatively affect our operations, financial results and cash flows.

Risk associated with regulatory compliance and changes. Our business and the businesses of our customers and suppliers are subject to a wide variety of government oversight and regulation,regulations, including those relating to environmental permitting requirements. The regulations promulgated or adopted by various government agencies, and the interpretations and application of such regulations, are dynamic and constantly evolving. If new regulations arise, the application of existing regulations expands, or the interpretation of applicable regulations changes, we may incur additional costs for compliance, including capital expenditures. For example, the United States Environmental Protection Agency (“EPA”) is required to routinely reassess the National Ambient Air Quality Standards (“NAAQS”) for criteria pollutants like nitrogen dioxide, sulfur dioxide, lead, ozone and particulate matter. These standards are frequently subject to litigation and revision. Revisions to the NAAQS could require us to make significant capital expenditures to ensure compliance and could make it more difficult for us to obtain required permits in the future. These risks are higher for our facilities that are located in non-attainment areas. For AK Coal, the coal mining industry is subject to numerous and extensive federal, state and local environmental laws and regulations, including laws and regulations related to permitting and licensing requirements, air quality standards, plant and wildlife protection, reclamation and restoration of mining properties, the discharge of materials into the environment, the storage, treatment and disposal of wastes, surface subsidence from underground mining and the effects of mining on groundwater quality and availability. Complex foreign and U.S. laws and regulations apply to our international operations, including but not limited to the Foreign Corrupt Practices Act, regulations related to import/export controls, the Office of Foreign Assets Control sanctions program, anti-boycott provisions and transportation and logistics regulations. These laws and regulations and changes in these laws and regulations may increase our cost of doing business in international jurisdictions and expose our operations and our employees to elevated risk. We have implemented policies and processes designed to comply with these laws and regulations, but failure by our employees, contractors or agents to comply with these laws and regulations could result in possible administrative, civil or criminal liability and reputational harm to us and our employees. We may also be indirectly affected through regulatory changes that impact our customers or suppliers. Regulatory changes that impact our customers could reduce the quantity of our products they demand or the price of our products that they are willing to pay. Regulatory changes that impact our suppliers could decrease the supply of products or availability of services they sell to us or could increase the price they demand for products or services they sell to us.

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Risks associated with climate change and greenhouse gas emission limitationsemissions. Our business and operations, as well as the business and operations of our key suppliers and customers, may become subject to legislation or regulation intended to limit climate change or greenhouse gas emissions. It is possible that limitations on greenhouse gas emissions may be imposed in the United States through federally-enacted legislation or regulation. For example, the EPA has issued and/or proposed regulations addressing greenhouse gas emissions, including regulations that will require large sources and suppliers in the United States to report greenhouse gas emissions. In addition, the United StatesU.S. Congress has introduced from time to time legislation aimed at limiting carbon emissions from carbon-intensive business operations. AmongThe CAFE standards and other potential material items, such billsexisting and future climate change-related legislation and regulation could include a systemalso affect our customers, and in particular our automotive customers, as they may assess and elect to use lower volumes of carbon emission credits issuedsteel to certain companies, similarachieve mandates related to emissions. Similarly, our suppliers may incur cost increases in order to comply with climate control legislation and regulation, which they could in turn attempt to pass through to us in the European Union’s existing “cap and trade” system.form of higher prices for critical goods and/or services. It is impossible, however, to forecast the terms of the final regulations and legislation, if any, and the resulting effects on us. Depending upon the terms of any such regulationslegislation or legislation,regulation, however, we could suffer negative financial impacts because of increased energy, operational, environmental and other costs to comply with the limitations that would be imposed on greenhouse gas emissions. In addition, depending upon whether similar limitations are imposed globally, the regulations and/or legislation could negatively impact our ability to compete with foreign steel companies situated in areas not subject to such limitations. Unless and until all of the terms of such
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regulation and legislation are known, however, we cannot reasonably or reliably estimate their impact on our financial condition, operating performance or ability to compete.

Risks associated with financial, credit, capital and banking markets.  In the ordinary course of business, we seek to access financial, credit, capital and/or banking markets at competitive rates. Currently, we believe we have adequate access to these markets to meet our reasonably anticipated business needs. We both provide and receive normal trade financing to our customers and receive from our suppliers normal trade financing.suppliers. If access to competitive financial, credit, capital and/or banking markets by us, or our customers or suppliers, is impaired, our operations, financial results and cash flows could be adversely impacted.

Risk associated with derivative contracts to hedge commodity pricing volatility. We use cash-settled commodity price swaps and options to reduce pricing volatility for a portion of our raw material, energy and other commodity purchases. We employ a systematic approach in order to mitigate the risk of potential volatile price movements of certain commodities. This approach is intended to protect us against a sharp rise in the price of commodities. However, engaging in the use of swaps, options and similar agreements for hedging entails a variety of risks. For example, if the price of an underlying commodity falls below the price at which we hedged the commodity, we will benefit from the lower market price for the commodity purchased, but may not realize the full benefit of the lower commodity price because of the hedged transaction. In certain circumstances we also could be required to provide collateral for a potential derivative liability or close our hedging transaction for the commodity. Additionally, there may be a timing lag (particularly for iron ore) between a decline in the price of a commodity underlying a derivative contract, which could require us to make payments in the short-term to provide collateral or settle the relevant hedging transaction, and the period when we experience the benefits of the lower cost input through physical purchases of the commodity the hedge covers. Further, for derivatives designated as cash flow hedges, we initially record the effective gains and losses in accumulated other comprehensive income (loss) and reclassify them to earnings in the same period we recognize the effect of the associated hedged transaction. We record all derivative gains or losses for which hedge accounting treatment has not been elected or from hedge ineffectiveness to earnings in the period the gain or loss occurs. Changes in the fair value of derivatives for which hedge accounting treatment has not been elected or greater hedge ineffectiveness than we anticipated on cash flow hedges may result in increased volatility in our reported earnings. The termination in 2016 of the pellet offtake agreement with Magnetation affects the accounting treatment of our existing iron ore derivatives contracts. As a result of the termination,For example, we discontinued designating those derivatives contracts as hedging instruments and immediately recognize changes in the fair value of theour iron ore derivative contracts in earnings when the change occurs,fair value changes, instead of when we recognize the underlying cost of iron ore, thus potentially increasing the volatility of our results of operations. Each of these risks related to our hedging transactions could adversely affect our financial results and cash flows.

Risks related to the potential permanent idling of facilities. We perform strategic reviews of our business, which may include evaluating each of our plants and operating units to assess their viability and strategic benefits. As part of these reviews, we may idle—whether temporarily or permanently—certain of our existing facilities in order to reduce participation in markets where we determine that our returns are not acceptable. For example, in December 2015 we temporarily idled the Ashland Works Hot End to mitigate our exposure to the carbon steel spot market. If we decide to permanently idle the Ashland Works Hot End or any other facility or assets, we are likely to incur and accelerate significant cash expenses, including those relating to labor benefit obligations, take-or-pay supply agreements and accelerated environmental remediation costs, as well as substantial non-cash charges for impairment of those assets and the effects on pension and OPEB liabilities. We could incur similar types of cash and non-cash costs if we elect to temporarily or permanently idle any of our other currently operating assets or facilities. If we elect to permanently idle material facilities or assets, it could adversely affect our operations, financial results and cash flows.

Risk of inability to fully realize benefits of margin enhancement initiatives. In recent years we have undertaken several significant projects in an effort to lower costs and enhance margins. These projects and initiatives include efforts to focus production and sales on higher margin products, increase our operating rates and lower our costs. We identified a number of areas for enhancing profitability, including increasing our percentage of contract sales, producing and selling a higher-margin mix of products (including lowering our sales to the carbon steel spot market, which drove our decision to temporarily idle the Ashland Works Hot End) and developing new
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products that can command higher prices from customers. If one or more of these key cost-savings or margin enhancement projects are unsuccessful, or are significantly less effective in achieving the level and timing of combined cost savings or margin enhancement than we anticipated, or if we do not achieve results as quickly as anticipated, our financial results and cash flows could be adversely impacted.

Risk of information technology (“IT”) security threats, cybercrime and cybercrime.exposure of private information. We rely on IT systems and networks in almost every aspect of our business activities. In addition, we and certain of our third-party data processing providers collect and store sensitive data.data, and our vendors or suppliers may collect and store sensitive data about us in their information system environments. We have taken, and intend to continue to take, what we believe are appropriate and reasonable steps to prevent security breaches in our systems and networks. In recent years, however, both the number and sophistication of IT security threats and cybercrimes have increased. Additionally, regulation has increased for companies to prevent security breaches and notify stakeholders if data is exposed. These IT security threats and increasingly sophisticated cybercrimes, including advanced persistent attacks, pose a risk to system security and the confidentiality, availability and integrity of our data. A breach in security could expose us to risks of production downtimes and operations disruptions, misuse of information or systems, or the compromisingcompromise of confidential information, which in turn could adversely affect our reputation, competitive position, business and financial results.

TableRisk of Contentsfailure to achieve expected benefits of the Precision Partners acquisition and/or to integrate Precision Partners successfully. We may be unable to achieve the strategic, operational, financial and other benefits contemplated as part of the acquisition of Precision Partners to the full extent expected or in a timely manner. If we are not as successful or timely as we expect in integrating Precision Partners, we may not fully realize the potential growth opportunities, ability to provide enhanced solutions to our customers, leveraging and acceleration of combined research and innovation efforts, and anticipated financial and non-financial benefits and opportunities from the acquisition. Goodwill is a significant part of Precision Partners’ assets and our inability to realize the benefits of the acquisition could result in an impairment of goodwill. These circumstances, either alone or in combination, could have other adverse effects on our business, financial results and cash flows.

Risks associated with changes in tax laws and regulations. We are a large corporation with operations in the U.S. and other jurisdictions. As such, we are subject to tax laws and regulations of the U.S. federal, state and local governments, as well as various foreign jurisdictions. We compute our income tax provision based on enacted tax rates in the jurisdictions in which we operate. Significant judgment is required in determining our tax provision for income taxes. Changes in tax laws or regulations may be enacted that could adversely affect our overall tax assets and liabilities. For example, on December 22, 2017, the U.S. government enacted the Tax Cuts and Jobs Act (the “Tax Act”). The changes included in the Tax Act are broad and complex. The final transition impacts of the Tax Act may differ from the estimates provided elsewhere in this Annual Report, possibly materially, due to, among other things, changes in interpretations of the Tax Act, any legislative action to address questions that arise because of the Tax Act, any changes in accounting standards for income taxes or related interpretations in response to the Tax Act, or any updates or changes to estimates we have used to calculate the transition impacts. Any changes in enacted tax laws (such as the recent U.S. tax legislation), rules or regulatory or judicial interpretations, any adverse outcome in connection with tax audits in any jurisdiction, or any change in the pronouncements relating to accounting for income taxes could materially and adversely impact our financial condition and results of operations.

Item 1B.Unresolved Staff Comments.

None.

Item 2.Properties.

We lease a buildingour corporate headquarters in West Chester, Ohio, which we use as our corporate headquarters. The initial term of the building lease expires in 2019 and there arethrough 2029, with two five-year options to extend the lease. We lease a building forown our new Research and Innovation Center located in Middletown, Ohio, for an initial term expiring in 2034.Ohio. We also lease an administration building located in Dearborn, Michigan.

Our operations consist primarily of eight steelmaking and finishing plants two coke plants and two tube manufacturing plants across six states—Indiana, Kentucky, Michigan, Ohio, Pennsylvania and West Virginia—and a tube manufacturing plant in Mexico.the United States. We own all of the domestic facilitiesour steelmaking and lease the Mexicanfinishing facilities. In addition, we operate two coke plants, a metallurgical coal production facility, three tube manufacturing plant.plants and eight tooling and stamping operations in the United States, Canada and Mexico.

Ashland Works is located in Ashland, Kentucky, and produces carbon steel. It consists of a blast furnace, basic oxygen furnaces and continuous caster for the production of carbon steel and aits coating line that helps to complete the finishing operation of material processed at Middletown Works. In December 2015, we temporarily idled the Hot End, which includes thea blast furnace, basic oxygen furnaces and continuous caster, in response to excess global supply and the increase in low-priced imports into the United States. The Ashland Works Hot End remains temporarily idled. We elected not to idle the coating line at Ashland Works, which principally finishes steel for the automotive market.

Butler Works is located in Butler, Pennsylvania, and produces stainless, electrical and carbon steel. Melting takes place in a highly-efficient electric arc furnace that feeds an argon-oxygen decarburization unit for the specialty steels. A ladle metallurgy furnace feeds
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two double-strand continuous casters. Butler Works also includes a hot rolling mill, annealing and pickling units and two tandem cold rolling mills. It also has various intermediate and finishing operations for both stainless and electrical steels.

Coshocton Works is located in Coshocton, Ohio, and consists of a stainless steel finishing plant containing two Sendzimer mills and two Z-high mills for cold reduction, four annealing and pickling lines, nine bell annealing furnaces, four hydrogen annealing furnaces, two bright annealing lines and other processing equipment, including temper rolling, slitting and packaging facilities.

Dearborn Works is located in Dearborn, Michigan and its operations include carbon steel melting, casting, hot and cold rolling and finishing operations for carbon steel. It consists of a blast furnace, basic oxygen furnaces, two ladle metallurgy furnaces, a vacuum degasser and two slab casters. Dearborn Works also has a hot rolling mill, a pickle line/tandem cold mill, batch anneal shops, a temper mill and a hot-dip galvanizing line for finishing products.

Mansfield Works is located in Mansfield, Ohio, and produces stainless steel. Operations include a melt shop with two electric arc furnaces, a ladle metallurgy furnace, an argon-oxygen decarburization unit, a thin-slab continuous caster and a hot rolling mill.

Middletown Works is located in Middletown, Ohio. ItOhio, and melts carbon steel and processes carbon and stainless steel. It consists of a coke facility, blast furnace, basic oxygen furnaces and continuous caster for the production of carbon steel. Middletown Works also has a hot rolling mill, cold rolling mill, two pickling lines, four annealing facilities, two temper mills and three coating lines for finishing products.

Rockport Works is located near Rockport, Indiana, and consists of a carbon and stainless steel finishing plant containing a continuous cold rolling mill, a continuous hot-dip galvanizing and galvannealing line, a continuous carbon and stainless steel pickling line, a continuous stainless steel annealing and pickling line, hydrogen annealing facilities and a temper mill.

Zanesville Works is located in Zanesville, Ohio, and consists of a finishing plant for some of the stainless and electrical steel produced at Butler Works and Mansfield Works and has a Sendzimer cold rolling mill, annealing and pickling lines, high temperaturehigh-temperature box anneal and other decarburization and coating units.

AK Tube, LLC (“AK Tube”), a subsidiary, hasowns a plant in Walbridge, Ohio, which operates six electric resistance welderwelded tube mills and a slitter. It also has a plant on leased property in Columbus, Indiana, which operates seven electric resistance welderwelded tube mills, two high-speed cold saws and one laser welder tube mill. A leased facility in Franklin, Indiana operates a high-capacity, high-speed cold saw and six nick-and-shear cutting machines.machine. AK Tube’s leased plant in Queretaro, Mexico, operates anone electric resistance welderwelded tube mill.mill and one high-speed cold saw.

AK Coal, a subsidiary, produces metallurgical coal from reserves in Somerset County, Pennsylvania.

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Mountain State Carbon, LLC, a subsidiary, produces furnace and foundry coke from its cokemaking facility in Follansbee, West Virginia, which consists of four batteries.

Precision Partners, a subsidiary, provides advanced-engineered solutions, tool design and build, hot- and cold-stamped steel components and complex assemblies for the automotive market across eight plants in Ontario, Alabama and Kentucky. Our facilities feature five large-bed, hot-stamping presses providing nine lines of production; 80 cold-stamping presses ranging from 200 tons to 3,000 tons of pressing capacity; 17 large-bed, high-tonnage tryout presses with prove-out capabilities for new tool builds; and 125 multi-axis welding assembly cells. We own one facility in Ontario and the remainder are leased.

Item 3.Legal Proceedings.

Information for this item may be found in Note 10 to the consolidated financial statements in Item 8 and in Management’s Discussion and Analysis of Financial Condition and Results of Operations in Item 7, both of which isare incorporated herein by reference.

Item 4.Mine Safety Disclosures.

The operation of AK Coal’s North Fork Mine and Coal Innovations, LLC coal wash plant (collectively, the “AK Coal Operations”) are subject to regulation by the Mine Safety and Health Administration (“MSHA”) under the Federal Mine Safety and Health Act of 1977, as amended (“Mine Act”). MSHA inspects mining and processing operations, such as the AK Coal Operations, on a regular basis and issues various citations and orders when it believes a violation has occurred under the Mine Act. Exhibit 95.1 to this Annual Report presents citations and orders from MSHA and other regulatory matters required to be disclosed by Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act or otherwise under this Item 4.


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PART II

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

AK Holding’s common stock has been listed on the New York Stock Exchange since April 5, 1995 (symbol: AKS). The reported high and low sales prices of the common stock for each quarter are presented below:
2016 20152017 2016
High Low High LowHigh Low High Low
First Quarter$4.48
 $1.64
 $6.17
 $3.62
$11.28
 $6.70
 $4.48
 $1.64
Second Quarter5.50
 3.31
 5.93
 3.81
7.70
 5.30
 5.50
 3.31
Third Quarter7.09
 3.87
 3.93
 2.05
6.88
 5.01
 7.09
 3.87
Fourth Quarter11.39
 4.42
 3.25
 1.99
6.29
 4.00
 11.39
 4.42

As of February 15, 2017,9, 2018, there were 314,789,404315,283,596 shares of common stock outstanding and held of record by 3,7853,629 stockholders. The closing stock price on February 15, 2017,9, 2018, was $8.49$4.50 per share. Because depositories, brokers and other nominees held many of these shares, the number of record holders is not representative of the number of beneficial holders. There were no unregistered sales of equity securities in the year ended December 31, 2016.2017.

Although we have elected to suspend ourdo not currently pay a dividend, program, no covenant restrictions currently would restrict our ability to declare and pay a dividend to our stockholders. Our $1,500.0 asset-backed revolving credit facility (the “Credit Facility”) contains certain restrictive covenants which could, under certain circumstances, restrict the dividend payments, but none of those circumstances currently apply. Under these covenants, dividendsDividends are permitted as long asif no default or event of default exists and (i) availability under the Credit Facility exceeds $337.520% of the lesser of the Credit Facility commitment or eligible collateral after advance rates or (ii) availability exceeds $262.515% of the lesser of the Credit Facility commitment or eligible collateral after advance rates and we meet a fixed charge coverage ratio of one to one as of the most recently ended fiscal quarter. At December 31, 2017, the availability under the Credit Facility significantly exceeds these amounts. If we cannot meet either of these thresholds, dividend paymentsannual dividends would be limited to $12.0 annually. At December 31, 2016, the availability undergreater of $18.0 or 0.5% of consolidated total assets, with additional dividends permitted equal to the greater of $25.0 or 0.7% of consolidated total assets in aggregate over the life of the Credit Facility significantly exceeded $337.5.
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Facility.

ISSUER PURCHASES OF EQUITY SECURITIES
Period 
Total
Number of
Shares
Purchased (a)
 
Average Price Paid Per
Share (a)
 
Total Number of
Shares (or Units)
Purchased as 
Part of Publicly
Announced Plans
or Programs (b)
 
Approximate
Dollar Value of
Shares that May
Yet be Purchased
Under the Plans or
Programs (b)
October 2016 4,193
 $4.91
 
  
November 2016 2,180
 5.78
 
  
December 2016 
 
 
  
Total 6,373
 5.21
 
 $125.6
Period 
Total
Number of
Shares
Purchased (a)
 
Average Price Paid Per
Share (a)
 
Total Number of
Shares (or Units)
Purchased as 
Part of Publicly
Announced Plans
or Programs (b)
 
Approximate
Dollar Value of
Shares that May
Yet be Purchased
Under the Plans or
Programs (b)
October 2017 609
 $5.88
 
  
November 2017 
 
 
  
December 2017 
 
 
  
Total 609
 5.88
 
 $125.6

(a)During the quarter, we repurchased common stock owned by participants under the terms of the AK Steel Holding Corporation Stock Incentive Plan. ToEmployees may have us withhold shares to pay federal, state and local taxes due upon the vesting of restricted stock or performance shares employees may have us withholdunder the terms of the AK Steel Holding Corporation Stock Incentive Plan. In this event, the withheld shares that have a fair market value equal to the minimum statutory withholding rate that tax authorities could impose on the transaction. We repurchase the withheld shares at the quoted average of the reported high and low sales prices on the day we withhold the shares.
(b)On October 21, 2008, the Board of Directors authorized us to repurchase, from time to time, up to $150.0 of our outstanding equity securities. The Board of Directors’ authorization specified no expiration date. We did not repurchase any of our equity securities under this authorization in 2017.


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The following graph compares cumulative total stockholder return on AK Holding’s common stock for the five-year period from January 1, 20122013 through December 31, 2016,2017, with the cumulative total return for the same period of (i) the Standard & Poor’s Small Cap 600 Stock Index, and (ii) the New York Stock Exchange Arca Steel Index. These comparisons assume an investment of $100 at the beginning of the period and reinvestment of dividends.


January 1, December 31,January 1, December 31,
2012 2012 2013 2014 2015 20162013 2013 2014 2015 2016 2017
AK Holding$100
 $56
 $99
 $72
 $27
 $124
$100
 $173
 $125
 $47
 $215
 $119
NYSE Arca Steel100
 102
 104
 75
 42
 80
100
 98
 71
 39
 75
 92
S&P 600 Small Cap100
 115
 160
 167
 162
 202
100
 136
 142
 137
 171
 191

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Item 6.Selected Financial Data.

The following selected historical consolidated financial data for each of the five years in the period ended December 31, 2016 are from the audited consolidated financial statements. This data should be read along with the consolidated financial statements presented in Item 8 and Management’s Discussion and Analysis of Financial Condition and Results of Operations presented in Item 7.
2016 2015 2014 2013 20122017 2016 2015 2014 2013
(dollars in millions, except per share and per ton data)(dollars in millions, except per share and per ton data)
Statement of Operations Data:                  
Net sales$5,882.5
 $6,692.9
 $6,505.7
 $5,570.4
 $5,933.7
$6,080.5
 $5,882.5
 $6,692.9
 $6,505.7
 $5,570.4
Pension and OPEB net corridor charge43.1
 131.2
 2.0
 
 157.3

 43.1
 131.2
 2.0
 
Operating profit (loss) (a)230.2
 86.7
 139.4
 135.8
 (128.1)
Operating profit (a)220.0
 230.2
 86.7
 139.4
 135.8
Net income (loss) attributable to AK Steel Holding Corporation (b)(7.8) (509.0) (96.9) (46.8) (1,027.3)6.2
 (7.8) (509.0) (96.9) (46.8)
Basic and diluted earnings (loss) per share (b)(0.03) (2.86) (0.65) (0.34) (9.06)0.02
 (0.03) (2.86) (0.65) (0.34)
Other Data:                  
Cash dividends declared per common share$
 $
 $
 $
 $0.10
Total shipments (in thousands of tons)6,051.8
 7,089.2
 6,132.7
 5,275.9
 5,431.3
Selling price per ton$969
 $942
 $1,058
 $1,056
 $1,092
Total flat-rolled shipments (in thousands of tons)5,596.2
 5,936.4
 6,974.0
 6,132.6
 5,275.8
Selling price per flat-rolled ton$1,022
 $955
 $929
 $1,021
 $1,014
Balance Sheet Data:                  
Cash and cash equivalents$173.2
 $56.6
 $70.2
 $45.3
 $227.0
$38.0
 $173.2
 $56.6
 $70.2
 $45.3
Working capital958.4
 763.6
 832.8
 372.2
 557.1
832.9
 958.4
 763.6
 832.8
 372.2
Total assets4,036.0
 4,084.4
 4,828.0
 3,579.1
 3,873.7
4,296.1
 4,036.0
 4,084.4
 4,828.0
 3,579.1
Current portion of long-term debt
 
 
 0.8
 0.7

 
 
 
 0.8
Long-term debt (excluding current portion)1,816.6
 2,354.1
 2,422.0
 1,479.6
 1,381.8
2,110.1
 1,816.6
 2,354.1
 2,422.0
 1,479.6
Current portion of pension and other postretirement benefit obligations41.3
 77.7
 55.6
 85.9
 108.6
40.1
 41.3
 77.7
 55.6
 85.9
Pension and other postretirement benefit obligations (excluding current portion)1,093.7
 1,146.9
 1,225.3
 965.4
 1,661.7
894.2
 1,093.7
 1,146.9
 1,225.3
 965.4
Total equity (deficit)90.7
 (595.6) (77.0) 192.7
 (91.0)129.2
 90.7
 (595.6) (77.0) 192.7

(a)Under our method of accounting for pensions and other postretirement benefits, we recorded pension corridor charges of $78.4, $144.3 $2.0, and $157.3$2.0 in 2016, 2015 2014 and 2012,2014, and OPEB corridor credits of $35.3 and $13.1 in 2016 and 2015. In 2017, we recorded an asset impairment charge of $75.6 related to the temporarily idled Ashland Works Hot End and a credit of $19.3 for the reversal of a liability for transportation costs. In 2016, we also recorded pension settlement charges of $25.0 and costs of $69.5 to terminate a pellet offtake agreement and for related transportation costs. In 2015, we also recorded a charge for a temporary facility idling of $28.1.
(b)Included in net income (loss) attributable to AK Steel Holding Corporation2017 was a non-cash charge of $32.1, or $0.10 per diluted share, for the effects of the Tax Cuts and Jobs Act. In 2015, werewe recorded charges for the impairments of our investments in Magnetation of $256.3, or $1.44 per diluted share, and AFSG Holdings, Inc. (“AFSG”) of $41.6, or $0.23 per diluted share; and for 2012 was a charge to income tax expense of $865.5, or $7.63 per diluted share, for an increase in the valuation allowance on deferred tax assets.share.

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

OperationsExecutive Overview

We are the only steelmaker in the United States that can produce in all three major categoriesa leading producer of flat-rolled steels— carbon, stainless and electrical. In addition, we areelectrical steel products, primarily for the only domestic producer operating both blast furnacesautomotive, infrastructure and electric arc furnaces, which provides usmanufacturing, electrical power generation and distribution markets. We leverage our advanced research and development and operational flexibilityexcellence to specialize in technically challenging steel products and the opportunity to innovate across markets and within our product portfolios.portfolios to add value to our steel solutions. We operate eight steelmaking and finishing plants, two coke plants and two tube manufacturing plants across six states—Indiana, Kentucky, Michigan, Ohio, Pennsylvania and West Virginia—and a tube manufacturing plantare the only steelmaker in Mexico. These operationsNorth America that can produce all three major categories of flat-rolled steels—namely carbon, steels, including premium-quality coated, cold-rolled and hot-rolled carbon steel products, and specialty stainless and electrical steels thatelectrical. In addition, through our subsidiaries, we sell in sheet and strip form, as well asprovide customer solutions with carbon and stainless steel thattubing products, advanced-engineered solutions, tool design and build, hot- and cold-stamped components and complex assemblies.

In 2016, we finish into welded steel tubing.began the process to improve our product mix, deemphasize commodity products, enhance our operational footprint and strengthen our balance sheet, and we continued to seek ways to enhance our margins in 2017. Product innovation has been a key tenet of our long-term strategy to differentiate us from our competitors. Our engineers and researchers continue to explore new solutions to serve our product development goals and operational challenges. We sell these products toexpanded our customers in three markets: (i) automotive; (ii) infrastructure and manufacturing; and (iii) distributors and converters markets. We sellgrowth platform by launching our new NEXMET family of AHSS coated carbon steel products principallyproducts. We began to North American customers and electrical and stainlessproduce our breakthrough NEXMET steel products both domestically and internationally. We also produce carbon and stainless steel that we finish into welded steel tubing used in the automotive, large truck, industrial and construction markets.from a new, state-of-the-art continuous galvanizing line at our Dearborn Works. In addition, we operate Mexican and European trading companies that buy and sell steel and steel products and other materials.

our researchers are jointly working with the DOE to develop the next
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generation of NOES for use in industrial motors, which we believe has applications for H/EVs and their significant future growth projections.

We remain committed to safely operatingare known throughout the steel industry for our facilitiesoperational excellence. During 2017, we enhanced our core steelmaking business by completing major investments at our Middletown Works blast furnace, melt shop and manufacturingelectrogalvanizing line. We also upgraded the melt shop and invested in new caster technology at our Mansfield Works. Because we produce technically challenging steels for customers who demand the highest quality steelsproducts on a just-in-time basis, the stability and dependability of our operations is paramount to our business model.

To give us additional flexibility to invest in an environmentally responsible manner. We experienced another year of outstanding safety performance in 2016 andstrategic initiatives, we continued to lead the steel industryimprove our capital structure in OSHA-recordable safety performance2017 by a wide margin. Our focusextending maturities and reducing interest rates and costs of our debt obligations and de-risking our balance sheet. This included refinancing debt at lower rates, eliminating certain financing obligations and extending and spreading out debt maturities.

One of our core strategies is to continue to diversify into downstream applications over time. To that end, on producing steelsAugust 4, 2017, we acquired 100% of the highest quality also continued, as we established several all-time company best recordsequity of Precision Partners, which provides advanced-engineered solutions, tool design and build, hot- and cold-stamped steel components and complex assemblies for quality performances.the automotive market. As further discussed below, the acquisition of Precision Partners allows us to get closer to our customers by moving down the automotive supply chain into a business that generally has higher margins and lower capital intensity than our legacy steel operations. We also maintain an unwavering commitmentbelieve that collaborative efforts between our steelmaking experts and Precision Partners can dramatically accelerate our efforts to responsible environmental performance throughout our operations and good corporate citizenship in our communities. During 2016, we experienced a record year of environmental performance overall, as well as setting records at severaldrive adoption of our individual facilities.innovative steel products by automotive manufacturers and their suppliers, particularly in lightweighting applications. Our financial results include the effects of the acquisition and Precision Partners’ operations for periods after August 4, 2017, which affects comparability to prior periods. See Acquisition of Precision Partners for more information.

20162017 Financial Results Overview

InOur 2017 net income of $6.2, or $0.02 per diluted share of common stock, improved from our 2016 we implemented a strategy to improve our product mix, strengthen our balance sheet and operate more efficiently and effectively to improve our profitability. We began a process to deemphasize commodity products and enhanced our operational footprint to maximize asset utilization. To reinforce our focus on value-added products, we continued our investments in research and innovation, including completing our new Research and Innovation Center in late 2016 and increasing the number of research engineers and scientists by approximately 30% over the last several years. Our focus on margin-enhancing activities, including better mix management, process improvements and a relentless focus on costs, significantly enhanced our margins. Consequently, our results in 2016 improved dramatically from 2015.

We completed 2016 with a net loss of $7.8, or $0.03 per diluted share of common stock, which compares favorably to our 2015 net loss of $509.0, or $2.86 per diluted share. Our 20162017 adjusted net income (as defined in Non-GAAP Financial Measures) of $94.6, or $0.30 per diluted share, compared to 2016 adjusted net income of $129.8, or $0.56 per diluted share, was a significant improvement from our 2015 adjusted net loss of $51.8, or $0.29 per diluted share. The financial results for 2016 include unrealized gains on iron ore derivatives of $45.6, or $0.20 per diluted share.

Our strategic decision to reduce exposure to the commodity markets resulted in 2016 net sales of $5.88 billion on shipments of 6,051,800 tons, a decrease from 2015 net sales of $6.69 billion on 7,089,200 tons. The reduction in shipments was primarily the result of lower levels of commodity carbon steel sold into the distributors and converters market, which declined by 41% in 2016 compared to 2015, as well as reduced shipments to the infrastructure and manufacturing market. These declines were partially offset by increased carbon and stainless steel shipments to the automotive industry. Reducing our shipments to commodity spot markets resulted in a higher average selling price for 2016, which increased 3% to $969 per ton from 2015.

Improving our product mix, optimizing our operational footprint, pursuing cost efficiencies and realizing lower costs for raw materials improved our adjusted EBITDA (as defined in Non-GAAP Financial Measures) was $416.4, or 6.8% of net sales, for 2017, compared to adjusted EBITDA of $501.9, or 8.5% of net sales, for 2016. Our reported results reflected net charges totaling $88.4, or $0.28 per diluted share, in 2016, from $393.4,2017, and $137.6, or 5.9% of$0.59 per diluted share, in 2016. The 2017 net sales, in 2015. We took various actionscharges were for non-cash charges to implement these strategies, including temporarily idlingreflect asset impairments at our temporary idled Ashland Works Hot End atand for a reduction in the endvalue of 2015 and increasing our operating rates at Middletown Works and Dearborn Works. Additional actions taken at all locations included efforts suchdeferred tax assets related to recent U.S. tax legislation, as enhancing asset and resource utilization to reduce operating costs and modifying production capacity and operationswell as a credit for higher margin steel grades. Costs for natural gas and raw materials, especially iron ore pellets, coke and scrap, were favorable in 2016 compared to 2015. We recorded LIFO creditsthe benefits of $23.3 in 2016, compared to LIFO credits of $195.3 for 2015.a transportation agreement.

We also made substantial progressAverage selling price per flat-rolled steel ton increased by 7% in strengthening our balance sheet during2017 from 2016, primarily due to higher prices for automotive and carbon spot market sales, and higher surcharge revenue due to higher raw material costs, partially offset by lower shipments to the automotive market. Our 2017 results included a LIFO charge of $113.4, compared to a LIFO credit of $23.3 for 2016, reflecting the increases in raw material costs year over year. In addition, we completed major planned maintenance outages totaling $84.9 and $62.1 for 2017 and 2016. We nearly doubled our total liquidity atrecorded unrealized gains on iron ore derivatives of $31.6 in 2017, as compared to unrealized gains of $45.6 in 2016. Also included in 2017 results were $21.5 of expenses related to debt refinancing, with similar expenses of $9.4 in 2016.

During the end of 2016 to $1,353.8 from $700.2 atquarter ended December 31, 2015. We refinanced $380.02017, we recognized a non-cash asset impairment charge of debt$75.6, primarily related to extend the maturity datelong-lived assets associated with the Ashland Works Hot End. The Ashland Works Hot End remains on temporary idle and no determination has been made regarding the long-term status of the operations. However, we now believe it is less likely that the Ashland Works Hot End will restart in the near term based on forecasted supply and demand characteristics of the markets that we serve.

In the fourth quarter of 2017, we reached an agreement that reduced our transportation obligations and provides a timeframe to begin using the rail cars that were idled after the 2016 termination of a pellet supply agreement. As a result, a credit of $19.3 was recorded in the fourth quarter of 2017 to reduce the coupon rateunpaid liability.

The Tax Cuts and raised $600.4Jobs Act of 2017, signed into law on December 22, 2017, reduced our corporate income tax rates, resulting in net proceeds from two equity offeringsa corresponding decrease in 2016 that were usedthe value of our deferred tax assets. As a result, our income tax expense for the fourth quarter of 2017 included a non-cash charge of $32.1, or $0.10 per diluted share.

In 2017, we continued to reduce debt andpursue our goal of increasing our financial flexibility for general corporate purposes. The proceeds from these equity offerings, along with cash generated from operations, considerably improved our balance sheet. Year-end 2016 liquidity of $1,353.8 consisted of cash and cash equivalents and $1,186.4 of availability under the company’sfuture strategic actions. We entered a new revolving credit facility.

Dearborn Acquisition

On September 16, 2014,facility (the “Credit Facility”) that extends to 2022 and lowered our borrowing rates. Additionally, we issued $680.0 in two senior notes offerings during the year, and redeemed almost $810.0 of old notes, lowering our principal amount of outstanding senior notes by $130.0, as well as extending maturities and lowering interest rates. Also in 2017, we acquired Dearborn for a cash purchase pricethe lease of $690.3, net of cash acquired. The acquisition includedour Research and Innovation Center, effectively settling the Dearborn Works, the Mountain State Carbon cokemaking facility and interests in joint ventures that process flat-rolled steel products. Our financial results include the effects of the acquisition and Dearborn Works operations for periods after September 16, 2014, affecting comparability to prior periods.

obligation.
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2016
2017 Compared to 20152016

Steel Shipments

SteelFlat-rolled steel shipments in 20162017 were 6,051,8005,596,200 tons, a 15%6% decrease from 2015compared to 2016 shipments of 7,089,2005,936,400 tons. The decrease in overall shipments was principally driven by our strategic decision to reduce commodity steel salesa 10% decline in shipments to the distributors and convertersautomotive market which declined by 41% from 2015.compared to 2016, primarily as a result of reduced North American light vehicle production. Shipments of flat-rolled steel by product category for 20162017 and 20152016, as a percent of total flat-rolled steel shipments, were as follows:

Flat-Rolled Steel Shipments by Product Category
         
Net Sales

Net sales in 2017 were $6,080.5, a 3% increase from 2016 net sales of $5,882.5. Our average net selling price was $1,022 per flat-rolled steel ton in 2017, a 7% increase from the 2016 average net selling price of $955 per flat-rolled ton. The increases reflect our strategy of producing and selling higher-value carbon, stainless and electrical steels, higher prices on both automotive and spot market sales, and higher surcharges on specialty steel products. Revenues for 2017 also included net sales of Precision Partners following the August 4, 2017 acquisition. Net sales to customers outside the United States were $627.1, or 10% of total sales, for 2017, compared to $655.6, or 11% of total sales, for 2016, primarily due to lower international sales of carbon and electrical steel.

The following table shows the percentage of our net sales to each of our markets:
Market 2017 2016
Automotive 65% 66%
Infrastructure and Manufacturing 16% 16%
Distributors and Converters 19% 18%

Cost of Products Sold

Cost of products sold in 2017 was $5,359.7, or 88.1% of net sales, and increased from 2016 cost of products sold of $5,064.7, or 86.1% of net sales, largely due to higher costs for raw materials, primarily scrap, chrome and other alloys. Included in 2017 was a LIFO charge of $113.4, compared to a LIFO credit of $23.3 in 2016. Cost of products sold included planned maintenance outage costs of $84.9 in 2017, compared to $62.1 in 2016. The higher planned maintenance outage costs in 2017 were primarily a result of larger planned maintenance projects at our Middletown Works blast furnace and steelmaking shops and our Mansfield Works melt shop.

Beginning in the third quarter of 2016, our iron ore derivatives no longer qualified for hedge accounting treatment. Therefore, we recorded adjustments to mark these derivatives to fair value each period and recognized the resulting unrealized gains or losses immediately in cost of products sold, versus recognizing them in the period that iron ore purchases affect earnings. In 2017, we recognized $31.6 of unrealized gains since the market price of iron ore and the fair value of the derivative contracts increased. Cost of products sold for the fourth quarter of 2016 included $33.8 of unrealized gains on iron ore derivatives contracts that were scheduled to
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settle in 2017 and 2018. As a result, cost of products sold for 2017 did not reflect $36.0 of realized gains from the contracts that settled during the year, but that were recognized in prior periods.

Selling and Administrative Expense

Selling and administrative expense increased to $282.9 in 2017 from $277.2 in 2016. The increase included acquisition costs of $6.2 in 2017 related to the Precision Partners acquisition and on-going expenses after its acquisition, partially offset by lower costs for employee incentive compensation in 2017 than in 2016.

Depreciation Expense

Depreciation expense increased slightly to $226.0 in 2017 from $216.6 in 2016. We recognized $5.8 of depreciation expense for Precision Partners’ property, plant and equipment since the August 4, 2017 acquisition.

Pension and Other Postretirement Employee Benefit (“OPEB”) Expense (Income)

Pension and OPEB income of $64.4 in 2017 increased from income of $43.8 in 2016. The increase in income was principally a result of lower amortization of unrealized actuarial losses. In 2017, we incurred no pension or OPEB corridor adjustments. In 2016, we incurred a pension corridor charge of $78.4 and an OPEB corridor credit of $35.3. Although the corridor adjustments affect reported operating and net income, they do not affect our cash flows in the current period. However, we expect to ultimately settle the pension and OPEB obligations in cash. See Critical Accounting Estimates for information on our policy for measurement and recognition of corridor adjustments. We also recorded settlement losses of $25.0 in 2016 as a result of the purchase of non-participating annuity contracts for certain retirees and lump sum payouts to new retirees.

Charges (Credit) for Termination of Pellet Agreement and Related Transportation Costs

In the fourth quarter of 2016, the United States Bankruptcy Court for the District of Minnesota approved a settlement agreement with certain third parties to terminate our long-term iron ore pellet offtake agreement with Magnetation and to wind down Magnetation’s business. In connection with that approval, we recognized charges of $69.5 in the fourth quarter of 2016 that covered both a $36.6 payment we made to the bankruptcy estate in the quarter and additional charges of $32.9 for remaining obligations under contracts with other third parties to transport pellets to our facilities. In the fourth quarter of 2017, we reached an agreement for transportation services that provides a timeframe to begin using the rail cars that were idled after the termination of the pellet supply agreement. As a result, we recorded a credit of $19.3 to reduce the unpaid liability during the fourth quarter of 2017. See Magnetation and Note 4 to the consolidated financial statements for further information.

Asset Impairment Charge

In 2017, we recognized a non-cash asset impairment charge of $75.6, primarily related to the long-lived assets associated with the temporarily idled Ashland Works Hot End. See Note 2 to the consolidated financial statements for further information.

Operating Profit

Operating profit for 2017 of $220.0 was lower than 2016 operating profit of $230.2. Included in the 2017 operating profit was the credit of $19.3 to reduce the transportation liability related to our terminated iron ore pellet offtake agreement and a non-cash asset impairment charge of $75.6, primarily for the Ashland Works Hot End fixed assets. Included in the 2016 operating profit was a net pension/OPEB corridor charge of $43.1, pension settlement charges of $25.0 and charges for the termination of the Magnetation pellet offtake agreement and related transportation costs of $69.5. Also included in operating profit was SunCoke Middletown’s operating profit of $61.7 and $66.0 for 2017 and 2016.

Interest Expense

Interest expense for 2017 decreased to $152.3 from $163.9 in 2016. The decrease from 2016 primarily reflected our successful actions to reduce our principal amount of senior unsecured notes and to refinance debt with lower interest rates in 2017.

Other Income (Expense)

Other income (expense) was expense of $17.1 and $4.9 for 2017 and 2016, primarily as a result of expenses of $21.5 and $9.4 that we incurred in connection with the refinancing of debt in 2017 and 2016. See Note 6 to the consolidated financial statements for further information on long-term debt financing.

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Income Tax Expense (Benefit)

The Tax Cuts and Jobs Act of 2017, signed into law on December 22, 2017, reduced corporate income tax rates and the corresponding value of our deferred tax assets. As a result, the company’s income tax expense for the fourth quarter of 2017 includes a $32.1 non-cash charge related to this change. We do not expect to incur cash tax liabilities in the near term, including any transition tax on undistributed earnings of our foreign subsidiaries, associated with the U.S. tax legislation due to the availability of existing net operating loss carryforwards.

Other than the effects of the new tax law, our income tax provision is primarily related to changes in our LIFO reserve, which results in a tax valuation allowance adjustment related to our deferred tax assets, and from the allocation of income tax expense to other comprehensive income. The 2017 benefit was primarily attributable to charges to the LIFO reserve. In addition, the 2017 and 2016 results included non-cash income tax benefits of $8.6 and $4.5 from allocating income tax expense to other comprehensive income. As a result, we recorded an income tax benefit of $17.0 in 2017, compared to income tax expense of $3.2 in 2016.

Net Income (Loss) and Adjusted Net Income (Loss) Attributable to AK Steel Holding Corporation

Net income attributable to AK Holding in 2017 was $6.2, or $0.02 per diluted share. The net income in 2017 included a credit of $19.3, or $0.06 per diluted share, to adjust the transportation liability associated with a terminated pellet offtake agreement, an asset impairment charge of $75.6, or $0.24 per diluted share, and a charge for tax legislation of $32.1, or $0.10 per diluted share. Excluding the above items, we reported adjusted net income of $94.6, or $0.30 per diluted share, for 2017.

Net loss attributable to AK Holding in 2016 was $7.8, or $0.03 per diluted share. The net loss in 2016 included a pension corridor charge of $78.4, an OPEB corridor credit of $35.3, and pension settlement charges of $25.0, netting to $68.1, or $0.29 per diluted share. Additionally, the net loss in 2016 included charges to terminate a pellet offtake agreement and related transportation costs of $69.5, or $0.30 per diluted share. Excluding these charges, our adjusted net income was $129.8, or $0.56 per diluted share, for 2016.

Adjusted EBITDA

Adjusted EBITDA was $416.4, or 6.8% of net sales, in 2017, as compared to $501.9, or 8.5% of net sales, in 2016.

2016 Compared to 2015

Steel Shipments

Flat-rolled steel shipments in 2016 were 5,936,400 tons, a 15% decrease from 2015 flat-rolled steel shipments of 6,974,000 tons. The decrease in flat-rolled steel shipments was principally driven by our strategic decision to reduce commodity steel sales to the distributors and converters market, which declined by 41% from 2015. Shipments of flat-rolled steel by product category for 2016 and 2015 as a percent of total flat-rolled steel shipments, were as follows:

Shipments by Product Category
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Net Sales

Net sales in 2016 were $5,882.5, a 12% decrease from 2015 net sales of $6,692.9. Our average selling price was $969 per net ton in 2016, a 3% increase from the 2015 average selling price of $942 per net ton. We received lower pricing in our automotive contracts in 2016, but the impact of better market conditions, reducing our participation in the commodity steel markets and capturing higher spot market pricing offset the automotive contract pricing declines. Our average selling price was $955 per net flat-rolled ton in 2016, a 3% increase from the 2015 average selling price of $929 per net flat-rolled ton. Net sales to customers outside the United States were $655.6, or 11% of total sales, for 2016, compared to $855.7, or 13% of total sales, for 2015 with the 2016 decrease primarily due to lower electrical steel shipments.

The following table shows the percentage of our net sales attributable to each of our markets:
Market 2016 2015
Automotive 66% 60%
Infrastructure and Manufacturing 16% 16%
Distributors and Converters 18% 24%

Cost of Products Sold

Cost of products sold in 2016 was $5,064.7, or 86.1% of net sales, and declined from 2015 cost of products sold of $6,032.0, or 90.1% of net sales, largely as a result of our decision to reduce shipments to the commodity spot markets. To generate these results, we optimized our operational footprint, pursued cost efficiencies and benefited from lower costs for raw materials. We also recorded unrealized gains of $45.6 from iron ore derivatives that no longer qualify for hedge accounting treatment after the termination of the pellet offtake agreement with Magnetation. Cost of products sold included outage costs of $62.1 in 2016, compared to $50.6 in 2015. In addition, LIFO credits were $23.3 in 2016, compared to LIFO credits of $195.3 in 2015. Costs for equipment maintenance, utilities and supplier obligations related to the temporarily idled facility were $22.1 in 2016.

Selling and Administrative Expense

Selling and administrative expense increased to $277.2 in 2016 from $261.9 in 2015. The increase was due primarily to an increase for employee incentive compensation as a result of meeting objectives under annual and long-term performance-based compensation plans, partially offset by cost reduction efforts achieved throughout 2016.

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Depreciation Expense

Depreciation expense increased slightly to $216.6 in 2016 from $216.0 in 2015.

Pension and Other Postretirement Employee Benefit (“OPEB”)OPEB Expense (Income)

Pension and OPEB income of $43.8 in 2016 decreased from income of $63.0 in 2015. The decrease in income was principally a result of lower pension assets and related expected returns on assets.

We incurred a pension corridor charge of $78.4 and an OPEB corridor credit of $35.3 in 2016, and a pension corridor charge of $144.3 and an OPEB corridor credit of $13.1 in 2015. Although the corridor charges and credits affectadjustments reduce reported operating and net income, they do not affect our cash flows in the current period. However, we expect to ultimately settle the pension and OPEB obligationsobligation in cash. SeeCritical Accounting Estimates for information on our policy for measurement and recognition of corridor charges (credits). We also recorded settlement losses of $25.0 in 2016 as a result of the purchase of non-participating annuity contracts for certain retirees and lump sum payouts to new retirees.

Charges for Termination of Pellet Agreement and Related Transportation Costs

In the fourth quarter of 2016, the United States Bankruptcy Court for the District of Minnesota approved a settlement agreement with certain third parties to terminate our long-term iron ore pellet offtake agreement with Magnetation and to wind down Magnetation’s business. In connection with that approval, we recognized charges of $69.5 in the fourth quarter of 2016 that covered both a $36.6 payment we made to the bankruptcy estate in the quarter and additional charges of $32.9 for remaining obligations under contracts with other third parties to transport pellets to our facilities for the next 12 years. We are actively working to mitigate these third-party transportation costs, though our ability to reduce them in whole or in part is uncertain. See Magnetation and Note 4 to the consolidated financial statements for further information.

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Charge for Facility Idling

In the fourth quarter of 2015, we temporarily idled the Ashland Works Hot End. We incurred a $28.1 charge in 2015 for supplemental unemployment and other employee benefit costs and equipment idling costs. Costs for equipment maintenance, utilities and supplier obligations related to the temporarily idled facility were $22.1 in 2016, which were included in cost of products sold and are expected to be at a similar level in 2017. Although we continue to maintain the facility in a manner that retains our ability to restart the Ashland Works Hot End if and when we deem such action to be advisable, we do not intend to restart the facility in the absence of market conditions and other factors that we determine will support the long-term profitability of the plant and its operations.2016.

Operating Profit

Operating profit for 2016 of $230.2 was higher than 2015 operating profit of $86.7. Included in the 2016 operating profit was the net pension/OPEB corridor charge of $43.1, the pension settlement charges of $25.0 and charges for the termination of the Magnetation pellet offtake agreement and related transportation costs of $69.5. Included in the 2015 operating profit was thea $28.1 charge to temporarily idle the Ashland Works Hot End and athe net pension/OPEB corridor charge of $131.2. Also included inwas operating profit wasfrom SunCoke Middletown’s operating profitMiddletown of $66.0 and $62.6 for 2016 and 2015.

Interest Expense

Interest expense for 2016 decreased to $163.9 from $173.0 in 2015. The decrease was primarily as a result of lower average Credit Facility borrowings outstanding during 2016 as compared to 2015 due to the two successful equity offerings completed during 2016.

Impairment of Magnetation Investment

We recognized a non-cash impairment charge of $256.3 infor 2015 related to our investment in Magnetation. For further discussion, see the Magnetation section below and Note 4 to the consolidated financial statements.

Impairment of AFSG Investment

During the fourth quarter of 2015, AK Steel received a cash distribution of $14.0 from AFSG, the holding company of our former insurance operations.AFSG. After this distribution, we determined that our remaining investment in AFSG was impaired and we recognized a non-cash charge of $41.6 to write off the remaining investment in AFSG.

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Other Income (Expense)

Other income (expense) was $4.9 of other expense for 2016 and other income of $1.4 for 2015. During 2016, we repurchased the $380.0 of senior secured notes due 2018 and an aggregate principal amount of $10.4 of senior notes due 2022. These 2016 debt transactions generated $9.4 of losses in other income (expense). During 2015, we repurchased an aggregate principal amount of $23.8 of senior notes duethe 2021 Notes in private, open market transactions and recognized related gains on the repurchases of $9.4. See Note 6 to the consolidated financial statements for further information on long-term debt financing. Other income (expense) included our share of Magnetation losses of $16.3 for 2015.

Income Taxes

We recorded an income tax expense of $3.2 in 2016, compared to income tax expense of $63.4 in 2015. We adjust our tax valuation allowance on our deferred tax assets for changes in our LIFO reserve, significantly affecting our income tax provision. Therefore, the income tax expense was lower in 2016 from 2015 principally due to a significant decline in LIFO credits.credit. In addition, the 2016 income tax expense included a non-cash income tax benefit of $4.5 from allocating income tax expense to other comprehensive income, compared to $13.2 in 2015.

Net Income (Loss) and Adjusted Net Income (Loss) Attributable to AK Steel Holding Corporation

Net loss attributable to AK Holding in 2016 was $7.8, or $0.03 per diluted share. The net loss in 2016 included a pension corridor charge of $78.4, an OPEB corridor credit of $35.3 and a pension settlement chargescharge of $25.0, netting to $68.1, or $0.29 per diluted share. Additionally the net loss in 2016 included charges to terminate the Magnetation pellet offtake agreement and related transportation costs of $69.5, or $0.30 per diluted share. Excluding the above charges, we reportedhad adjusted net income of $129.8, or $0.56 per diluted share, for 2016.

Net loss attributable to AK Holding in 2015 was $509.0, or $2.86 per diluted share. The net loss in 2015 included a pension corridor charge of $144.3 and an OPEB corridor credit of $13.1, netting to $131.2, or $0.74 per diluted share. Additionally, the net loss in 2015 included an impairment charge for the Magnetation investment of $256.3, or $1.44 per diluted share, and an impairment charge for the AFSG investment of $41.6, or $0.23 per diluted share, and a charge to temporarily idle the Ashland Works Hot End of $28.1, or $0.16 per diluted share. Excluding these charges, we had an adjusted net loss of $51.8, or $0.29 per diluted share, for 2015.

Adjusted EBITDA

Adjusted EBITDA improved to $501.9, or 8.5% of net sales, in 2016, from $393.4, or 5.9% of net sales, in 2015.

2015 Compared to 2014

Steel Shipments

Steel shipments in 2015 were 7,089,200 tons, a 16% increase from 2014 shipments of 6,132,700 tons. The increase in overall shipments in 2015 compared to 2014 was principally from the addition of shipments from Dearborn Works following the September 2014 acquisition. As a result of the high level of imports in 2015, we targeted shipments to the automotive market and elected to reduce shipments to the carbon steel spot market. Primarily as a result of a relatively higher proportion of carbon spot market shipments in the Dearborn Works product mix compared to our historical mix, our higher-margin value-added shipments as a percent of total volume shipped decreased from 82.1% in 2014 to 79.3% in 2015. Shipments by product category for 2015 and 2014 as a percent of total shipments, were as follows:

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Shipments by Product Category
Net Sales

Net sales in 2015 were $6,692.9, a 3% increase from 2014 net sales of $6,505.7. The increase in net sales is primarily due to the addition of net sales from Dearborn Works following the September 2014 acquisition. However, net sales did not increase as much as shipments did from 2014 to 2015, primarily due to sharply reduced market prices driven by global overcapacity and unfairly-traded, lower-priced foreign steel imports that flooded the domestic market in 2015. Our average selling price was $942 per net ton in 2015, an 11% decrease from the 2014 average selling price of $1,058 per net ton. Net sales to customers outside the United States were $855.7, or 13% of total sales, for 2015, compared to $755.4, or 12% of total sales, for 2014.    

The following table shows the percentage of our net sales attributable to each of our markets:
Market 2015 2014
Automotive 60% 53%
Infrastructure and Manufacturing 16% 18%
Distributors and Converters 24% 29%

Cost of Products Sold

Cost of products sold in 2015 was $6,032.0 and remained flat compared to 2014 cost of products sold of $6,007.7. Shipments from Dearborn Works following the September 2014 acquisition increased cost of products sold in 2015. These costs were largely offset by:

Lower raw material costs for carbon scrap, iron ore pellets, coke and energy in 2015
Planned outages costs were $50.6 in 2015, significantly lower than planned outages costs of $74.9 in 2014
LIFO credits were $195.3 in 2015, compared to LIFO credits of $21.0 in 2014
Extreme winter weather conditions early in 2014 and unplanned maintenance outage costs of $41.2 for incidents at our Ashland Works blast furnace during 2014 negatively affected cost of products sold in 2014

Selling and Administrative Expense

Selling and administrative expense increased to $261.9 in 2015 from $247.2 in 2014. The increase was primarily from Dearborn Works selling and administrative costs after the September 2014 acquisition.

Depreciation Expense

Depreciation expense increased to $216.0 in 2015 from $201.9 in 2014, primarily because of the additional Dearborn Works depreciation.

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Pension and OPEB Expense (Income)

Pension and OPEB income of $63.0 in 2015 decreased from income of $92.5 in 2014. The decrease in income in 2015 was largely from an increase in the amount of amortization from unrealized actuarial losses.

We incurred a pension corridor charge of $144.3 and an OPEB corridor credit of $13.1 in 2015, and a pension corridor charge of $2.0 in 2014. Although the corridor charge reduces reported operating and net income, it does not affect our cash flows in the current period. However, we expect to ultimately settle the pension obligation in cash. See Critical Accounting Estimates for information on our policy for measurement and recognition of corridor charges (credits).

Charge for Facility Idling

In the fourth quarter of 2015, we temporarily idled the Ashland Works Hot End. We incurred a $28.1 charge during the quarter, which included $22.2 for supplemental unemployment and other employee benefit costs and $5.9 for equipment idling costs and other costs.

Operating Profit

Operating profit for 2015 of $86.7 was lower than 2014 operating profit of $139.4. Included in the 2015 operating profit was a $28.1 charge to temporarily idle the Ashland Works Hot End and the net pension/OPEB corridor charge of $131.2. Also included was operating profit from SunCoke Middletown of $62.6 and $63.0 for 2015 and 2014.

Interest Expense

Interest expense for 2015 increased to $173.0 from $144.7 in 2014. The year-over-year increase was primarily for indebtedness to finance a portion of the Dearborn purchase price and higher average Credit Facility borrowings outstanding during 2015 as compared to 2014.

Impairment of Magnetation Investment

We recognized a non-cash impairment charge of $256.3 for 2015 related to our investment in Magnetation. For further discussion, see the Magnetation section below and Note 4 to the consolidated financial statements.

Impairment of AFSG Investment

As part of our ongoing strategic review of our business and operations, in the fourth quarter of 2015 we reevaluated our investment in AFSG, the holding company of our former insurance operations. During the fourth quarter of 2015, AK Steel received a cash distribution of $14.0 from AFSG. After this distribution, we determined that our remaining investment in AFSG is impaired and we recognized a non-cash charge of $41.6 to write off the remaining investment in AFSG.

Other Income (Expense)

Other income (expense) was $1.4 of income for 2015 and other expense of $21.1 for 2014. Other income (expense) included our share of Magnetation losses of $16.3 for 2015 and $15.2 for 2014. The Magnetation loss shown is our share of its results of operations for the first quarter of 2015. The results of operations for periods after March 31, 2015, do not include any losses of Magnetation as the basis in the Magnetation investment had been reduced to zero as of March 31, 2015, and we have no further investment commitments to Magnetation. During 2015, we repurchased an aggregate principal amount of $23.8 of the 2021 Notes in private, open market transactions and recognized gains on the repurchases of $9.4. Also affecting the year-to-year change in other income (expense) were $12.6 of costs we incurred in 2014 for committed bridge financing that we arranged but did not use for the Dearborn acquisition.

Income Taxes

Income tax expense in 2015 was $63.4 compared to $7.7 in 2014. We adjust our tax valuation allowance on our deferred tax assets for changes in our LIFO reserve, significantly affecting our income tax expense. Therefore, income tax expense increased from 2015 to 2014 principally due to LIFO credits of $195.3 in 2015 as compared to LIFO credits of $21.0 in 2014. In addition, 2015 income tax expense included a non-cash income tax benefit of $13.2 from allocating income tax expense to other comprehensive income.

Net Income (Loss) and Adjusted Net Income (Loss)

Net loss attributable to AK Holding in 2015 was $509.0, or $2.86 per share. The net loss in 2015 included a pension corridor charge of $144.3 and an OPEB corridor credit of $13.1 netting to $131.2, or $0.74 per diluted share. Additionally the net loss in 2015 included
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an impairment charge for the Magnetation investment of $256.3, or $1.44 per diluted share, and an impairment charge for the AFSG investment of $41.6, or $0.23 per diluted share, and a charge to temporarily idle the Ashland Works Hot End of $28.1, or $0.16 per diluted share. Excluding the above charges, we had an adjusted net loss of $51.8, or $0.29 per diluted share, for 2015.

Net loss attributable to AK Holding in 2014 was $96.9, or $0.65 per diluted share. The net loss in 2014 included a pension corridor charge and OPEB charge of $5.5, or $0.04 per diluted share, and net-of-tax acquisition-related expenses for the Dearborn acquisition of $31.7, or $0.21 per diluted share. Excluding these charges, we had an adjusted net loss of $59.7, or $0.40 per diluted share, for 2014.EBITDA

Adjusted EBITDA

Adjusted EBITDA (as defined below under Non-GAAP Financial Measures) was $501.9, or 8.5% of net sales, for 2016, and $393.4, or $55 per ton,5.9% of net sales, for 2015, and $280.2, or $46 per ton, for 2014.2015.

Non-GAAP Financial Measures

In certain of our disclosures, we have reported adjusted EBITDA, adjusted EBITDA margin and adjusted net income (loss) that exclude the effects of noncontrolling interests, pension and OPEB net corridor and settlement charges, charges (credit) for the termination of aan iron ore pellet offtake agreement and related transportation costs, impairment charges for our investments in Magnetation and AFSG, and charges for temporarily idling facilities.facilities, an asset impairment charge and a charge for the change in U.S. income tax law. We believe that reporting adjusted net income (loss) attributable to AK Holding (as a total and on a per share basis) with these items excluded more clearly reflects our current operating results and provides investors with a better understanding of our overall financial performance.

EBITDA is an acronym for earnings before interest, taxes, depreciation and amortization. It is a metric that is sometimes used to compare the results of different companies by removing the effects of different factors that might otherwise make comparisons inaccurate or inappropriate. For purposes of this report, we have made adjustments to EBITDA to also exclude the effect of noncontrolling interests, pension and OPEB net corridor and settlement charges, charges (credit) for the termination of aan iron ore pellet offtake agreement and related transportation costs, impairment charges for our investments in Magnetation and AFSG and charges for temporarily idling facilities.facilities, an asset impairment charge and a charge for the change in U.S. income tax law. The adjusted results, although not financial measures under generally accepted accounting principles in the United States (“GAAP”) and not identically applied by other companies, facilitate the ability to analyze our financial results in relation to those of our competitors and to our prior financial performance by excluding items that otherwise would distort the comparison. Adjusted EBITDA, adjusted EBITDA margin and adjusted net income (loss) are not, however, intended as alternative measures of operating results or cash flow from operations as determined in accordance with GAAP and are not necessarily comparable to similarly titled measures used by other companies.

We recognize in our results of operations, as a corridor adjustment, any unrecognized actuarial net gains or losses that exceed 10% of the larger of projected benefit obligations or plan assets. Amounts inside this 10% corridor are amortized over the plan participants’ life expectancy. The need for a corridor charge is considered at any remeasurement date, but has generally only been recorded in the fourth quarter at the time of the annual remeasurement. After excluding the corridor charge, the remaining pension and OPEB expenses included in the non-GAAP measure are comparable to the accounting for pension and OPEB expenses on a GAAP basis in the first three quarters of the year and we believe this is useful to investors in analyzing our results on a quarter-to-quarter basis, as well as analyzing our results on a year-to-year basis. As a result of the corridor method of accounting, our subsequent financial results on both a GAAP and a non-GAAP basis do not contain any amortization of prior period actuarial gains or losses that exceeded the corridor threshold because those amounts were immediately recognized as a corridor adjustment in the period incurred. Actuarial net gains and losses occur when actual experience differs from any of the many assumptions used to value the benefit plans, or when the assumptions change, as they may each year when we perform a valuation. The two most significant of those assumptions are the discount rate we use to value projected plan obligations and the rate of return on plan assets. In addition, changes in other actuarial assumptions and the degree by which the unrealized gains or losses are within the corridor threshold before remeasurement will affect the corridor adjustment calculation. The effect of prevailing interest rates on the discount rate as of a measurement date and actual return on plan assets compared to the expected return will have a significant impact on our liability, corridor adjustment and following year’s expense for these benefit plans. For example, actuarial assumptions we made to remeasure the funded status of our pension and OPEB obligations in the fourth quarter of 2016 affected actuarial losses and the related pension/OPEB net corridor charge. The net corridor charge reflected (i) a decrease in the discount rate assumption used to determine pension liabilities from 4.15% at December 31, 2015 to 3.35% at the October 2016 remeasurement (an actuarial loss of approximately $221.1), partially offset by (ii) gains from changes in pension and OPEB mortality assumptions, lower claims costs and other demographic factors (netting to a gain of approximately $76.4) and (iii) the net effect of the difference between the expected annualized return on assets of 7.25% ($129.4) and the actual annualized return on assets of 12.7% as of the October 2016 remeasurement ($228.8) (netting to a gain of $99.4). We believe that the corridor method of accounting for pension and OPEB obligations is rarely used by other publicly traded companies. However, because other companies use different approaches to recognize actuarial gains and losses, our resulting pension and OPEB expense on a GAAP basis or a non-GAAP basis may not be comparable to other companies’ pension and OPEB expense on a GAAP
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basis. Although the net corridor charge reduces reported operating and net income, it does not affect our cash flows in the current period. However, we expect to ultimately settle the pension and OPEB obligations in cash.

Neither current shareholders nor potential investors in our securities should rely on adjusted EBITDA, adjusted EBITDA margin or adjusted net income (loss) as a substitute for any GAAP financial measure and we encourage investors and potential investors to review the following reconciliations of adjusted EBITDA and adjusted net income (loss).

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Reconciliation of Adjusted EBITDA
 2016 2015 2014 2017 2016 2015
Net income (loss) attributable to AK Holding $(7.8) $(509.0) $(96.9) $6.2
 $(7.8) $(509.0)
Net income attributable to noncontrolling interests 66.0
 62.8
 62.8
 61.4
 66.0
 62.8
Income tax expense 3.2
 63.4
 7.7
Income tax expense (benefit) (17.0) 3.2
 63.4
Interest expense 163.9
 173.0
 144.7
 152.3
 163.9
 173.0
Interest income (1.6) (1.3) (0.7) (1.4) (1.6) (1.3)
Depreciation 216.6
 216.0
 201.9
 226.0
 216.6
 216.0
Amortization 4.8
 8.4
 9.1
 10.3
 4.8
 8.4
EBITDA 445.1
 13.3
 328.6
 437.8
 445.1
 13.3
Less: EBITDA of noncontrolling interests (a) 80.8
 77.1
 77.2
 77.7
 80.8
 77.1
Pension and OPEB net corridor and settlement charges 68.1
 131.2
 5.5
 
 68.1
 131.2
Charges for termination of pellet agreement and related transportation costs 69.5
 
 
Charges (credit) for termination of pellet agreement and related transportation costs (19.3) 69.5
 
Impairment of Magnetation investment 
 256.3
 
 
 
 256.3
Impairment of AFSG investment 
 41.6
 
 
 
 41.6
Charge for facility idling 
 28.1
 
 
 
 28.1
Acquisition-related expenses 
 
 23.3
Asset impairment charge 75.6
 
 
Adjusted EBITDA (b) $501.9
 $393.4
 $280.2
 $416.4
 $501.9
 $393.4
Adjusted EBITDA margin 8.5% 5.9% 4.3% 6.8% 8.5% 5.9%

(a)The reconciliation of EBITDA ofnet income attributable to noncontrolling interests to net income attributable toEBITDA of noncontrolling interests is as follows:
 2016 2015 2014 2017 2016 2015
Net income attributable to noncontrolling interests $66.0
 $62.8
 $62.8
 $61.4
 $66.0
 $62.8
Depreciation 14.8
 14.3
 14.4
 16.3
 14.8
 14.3
EBITDA of noncontrolling interests $80.8
 $77.1
 $77.2
 $77.7
 $80.8
 $77.1

(b)Included in adjusted EBITDA and adjusted net income (loss) for the yearyears ended December 31, 2017 and 2016, waswere $31.6 and $45.6, or $0.10 and $0.20 per diluted share, of unrealized gains on iron ore derivatives. See Note 17 to the consolidated financial statementsderivatives that do not qualify for additional information.hedge accounting.

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Reconciliation of Adjusted Net Income (Loss)
 2016 2015 2014 2017 2016 2015
Reconciliation to Net Income (Loss) Attributable to AK Steel Holding      
Net income (loss) attributable to AK Steel Holding Corporation, as reported $(7.8) $(509.0) $(96.9)
Reconciliation to Net Income (Loss) Attributable to AK Holding      
Net income (loss) attributable to AK Holding, as reported $6.2
 $(7.8) $(509.0)
Pension and OPEB net corridor and settlement charges 68.1
 131.2
 5.5
 
 68.1
 131.2
Charges for termination of pellet agreement and related transportation costs 69.5
 
 

Charges (credit) for termination of pellet agreement and related transportation costs (19.3) 69.5
 
Impairment of Magnetation investment 
 256.3
 
 
 
 256.3
Impairment of AFSG investment 
 41.6
 
 
 
 41.6
Charge for facility idling 
 28.1
 
 
 
 28.1
Acquisition-related expenses (net of tax) 
 
 31.7
Adjusted net income (loss) attributable to AK Steel Holding Corporation $129.8
 $(51.8) $(59.7)
Asset impairment charge 75.6
 
 
Non-cash charge for U.S. tax legislation 32.1
 
 
Adjusted net income (loss) attributable to AK Holding (b) $94.6
 $129.8
 $(51.8)
            
Reconciliation to Diluted Earnings (Loss) per Share            
Diluted earnings (loss) per share, as reported $(0.03) $(2.86) $(0.65) $0.02
 $(0.03) $(2.86)
Pension and OPEB net corridor charge/settlement loss 0.29
 0.74
 0.04
 
 0.29
 0.74
Charges for termination of pellet agreement and related transportation costs 0.30
 
 
Charges (credit) for termination of pellet agreement and related transportation costs (0.06) 0.30
 
Impairment of Magnetation investment 
 1.44
 
 
 
 1.44
Impairment of AFSG investment 
 0.23
 
 
 
 0.23
Charge for facility idling 
 0.16
 
 
 
 0.16
Acquisition-related expenses 
 
 0.21
Adjusted diluted earnings (loss) per share $0.56
 $(0.29) $(0.40)
Asset impairment charge 0.24
 
 
Non-cash charge for U.S. tax legislation 0.10
 
 
Adjusted diluted earnings (loss) per share (b) $0.30
 $0.56
 $(0.29)

Liquidity and Capital Resources

OneIn 2017, we created additional financial flexibility to better position us to execute our strategic priorities. Our actions in 2017 included refinancing senior notes at lower rates, extending maturities and eliminating other financing obligations. Additionally, we entered a new Credit Facility that extended its maturity and more closely aligned its borrowing limit with the collateral that supports it.

The new $1,350.0 Credit Facility, which expires September 2022, is secured by the same classes of our principal initiatives for 2016 was to strengthen our balance sheet and we made significant progress on this goal. Through a combination of cash flow from operations and proceeds from two equity offerings, we significantly reduced our indebtedness duringassets as the year. We ended 2016 with substantially higher liquidity than the prior year, no borrowings under our revolvingold $1,500.0 credit facility, and improved credit metrics.

which was set to expire in March 2019. At December 31, 2016,2017, we had total liquidity of $1,353.8,$844.5, consisting of $167.4$37.2 of cash and cash equivalents and $1,186.4$807.3 of availability under our $1,500.0the Credit Facility. The Credit Facility is guaranteed by AK Steel’s parent company, AK Holding, and by AK Tube, AK Steel Properties, Inc. and Mountain State Carbon, three 100%-owned subsidiaries of AK Steel. It is scheduled to expire in March 2019 and any amounts outstanding under it at the time of expiration would need to be repaid or refinanced. Our obligations under our Credit Facility are secured by our inventory and accounts receivable, and availability under the Credit Facility fluctuates monthly based on our varying levels of eligible collateral. AtOur eligible collateral was $1,328.8 at December 31, 2016, our eligible collateral,2017, after application of applicable advance rates, was $1,257.1.rates. At December 31, 2016,2017, we had no$450.0 of outstanding borrowings under the Credit Facility, and $70.7$71.5 of outstanding letters of credit that further reduced availability. During the year ended December 31, 2016,2017, our borrowings from the Credit Facilitycredit facilities ranged from zero to $665.0,$520.0, with outstanding borrowings averaging $292.6$175.0 per day. The Credit Facility provides us with enhanced liquidity and financial and strategic flexibility. See Restrictions Under Debt Agreements below for more information on the Credit Facility.

We believe that our current sources of liquidity will be adequate to meet our obligations for the foreseeable future. We expect to fund future liquidity requirements for items such as employee and retiree benefit obligations, scheduled debt maturities, debt redemptions and capital investments with internally-generated cash and other financing sources. Consolidated cash and cash equivalents of $173.2$38.0 at December 31, 2016,2017, includes $5.8$0.8 of cash and cash equivalents of consolidated variable interest entities, which are not available for our use. We may use the Credit Facility as necessary to fund requirements for working capital, capital investments and other general corporate purposes. Otherwise, we have no scheduled debt maturities until November 2019, when $150.0 of 5.0% Exchangeable Senior Notes (the “Exchangeable Notes”) are due. Our Credit Facility is scheduled to expire in September 2022 and any amounts outstanding under it at the time of expiration would need to be repaid or refinanced.

We regularly evaluate accessing the equity and debt capital markets as a source of liquidity if we view conditions as favorable, including issuing additional equity, as part of our efforts to reduceimprove our leverage. For a discussion of 2016 capital market transactions, see Investing and Financing Activities.structure. We may also, from time to time, repurchase outstanding notes in the open market on an unsolicited basis, by tender offer, through privately negotiated transactions or otherwise. Our forward-looking statements on liquidity
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are based on currently available information and expectations and, if the information or expectations are inaccurate or conditions deteriorate, there could be a material adverse effect on our liquidity.
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For longer-term obligations, we have significant debt maturities and other obligations that will be due in future periods, including possible required cash contributions to our qualified pension plan. For further information, see the Contractual Obligations section.

Cash from operating activities totaled $304.6$198.8 for 2016,2017, which includes $83.3$77.1 that was generated by and can only be used by SunCoke Middletown for its operations or for distribution to its equity owners. Cash generated from a $112.4 decrease$46.2 increase in inventoryaccounts payable was partially offset by a $113.5 decrease$34.4 increase in accounts payable.receivable. During the year, we made required annual pension contributions of $44.1 and payments for other pension and OPEB benefits of $67.4 (see Employee Benefit Obligations for more information) and a payment to the Magnetation bankruptcy estate to terminate a pellet offtake agreement for $36.6 (see Magnetation for more information).$40.7. The remaining cash from operations was generated from normal business activities for the year.

Investing and Financing Activities

During 2016,2017, net cash used for investing activities totaled $125.3,$508.7, primarily due to our acquisition of Precision Partners for $360.4, net of cash acquired, and for capital investmentsexpenditures.

Net cash from financing activities in 2017 was $174.7, primarily from borrowings on the Credit Facility to acquire Precision Partners and to refinance debt to extend the maturities for two series of $127.6. senior unsecured notes at lower interest rates. In March 2017, as part of a transaction to refinance our 7.625% Senior Notes due May 2020, we issued $400.0 aggregate principal amount of 7.00% Senior Unsecured Notes due March 2027 and generated net proceeds of $394.0 after underwriting discount. In August 2017, as part of a transaction to refinance our 8.375% Senior Notes due April 2022, we issued $280.0 aggregate principal amount of 6.375% Senior Unsecured Notes due October 2025 and generated net proceeds of $275.8 after underwriting discount.

In addition to refinancing debt, we financed $25.2 of our newalso acquired the Research and Innovation Center through a capital lease that is excluded from cash flows for investing activities.

Net cash used by financing activities in 2016 of $62.7 primarily included funds raised from capital market transactions to reduce our debt, offset by our $550.0 repayment of borrowings on$26.6, effectively settling the Credit Facility. In the second quarter of 2016, we issued 59.8 million shares of common stock at $4.40 per share, and we used the net proceeds of $249.5 to reduce outstanding borrowings under the Credit Facility. In the fourth quarter of 2016, we issued an additional 74.8 million shares of common stock at $4.90 per share, and we used the net proceeds of $351.0 to reduce outstanding borrowings under the Credit Facility and for general corporate purposes.

To refinance near-term maturities, we issued $380.0 in principal amount of 7.50% senior secured notes due 2023 (“Secured Notes”) and repaid $251.7 in principal amount of the existing senior secured notes due 2018 (the “Old Notes”) through a tender offer in the second quarter of 2016. We subsequently called, repaid and retired the remaining $128.3 in principal of the Old Notes in the third quarter of 2016.

During 2016, we also repurchased some of our senior unsecured notes at a discount, as we bought a principal amount of $10.4 of notes that resulted in gains of $3.0.liability. The total cash used for financing activities also includes $85.1$79.1 of payments from SunCoke Middletown to SunCoke.

Restrictions Under Debt Agreements

The Credit Facility and indentures governing our senior indebtedness and tax-exempt fixed-rate industrial revenue bonds (“IRBs”) (collectively, the “Notes”) and Credit Facility contain restrictions and covenants that may limit our operating flexibility. The Credit Facility contains commoncustomary restrictions, including limitations on, among other things, distributions and dividends, acquisitions and investments, dispositions, indebtedness, liens and affiliate transactions. Availability is calculated as the lesser of the total commitments under the Credit Facility or eligible collateral after advance rates, less outstanding revolver borrowings and letters of credit. The Credit Facility requires us to maintain a minimum fixed charge coverage ratio of one to one if availability under the Credit Facility is less than $150.0.$135.0. We are in compliance with restrictions and covenants under our Credit Facility and Notes and, in the absence of any significant and sustained material adverse events, expect that we will remain in compliance for the foreseeable future.

The indentures governing the Notes (other than the Exchangeable Notes) include customary restrictions on (a) the incurrence of additional debt by certain of our subsidiaries, (b) the incurrence of certain liens, (c) the amount of sale/leaseback transactions, and (d) our ability to merge or consolidate with other entities or to sell, lease or transfer all or substantially all of our assets to another entity. They also contain customary events of default. In addition, the indenture governing the 7.50% Senior Secured Notes due July 2023 includes covenants with customary restrictions on the use of proceeds from the sale of collateral. The indenture governing the Exchangeable Notes does not contain any financial or operating covenants or restrictions on the payments of dividends, the incurrence of indebtedness or the issuance or repurchase of securities by us.

We do not expect any of these restrictions to affect or limit our ability to conduct our business in the ordinary course. During 2016,2017, we were in compliance with all the terms and conditions of our debt agreements.

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Capital Investments

Cash used for capital investments in 20162017 totaled $127.6.$152.5. For 2017,2018, we expect to make capital investments of $130.0 to $150.0.$160.0. This amount could be adjusted based on changes in market conditions or operational needs. In the near-term, we expect to fund these investments from cash generated from operations or from borrowings from our Credit Facility. We currently anticipate that our normal, ongoing maintenance capital investments (i.e., excluding strategic investments and non-routine maintenance investments, such as blast furnace re-lines) will be at a similar level over the next few years.

Employee Benefit Obligations

In addition to actions taken in prior years to reduce the growth of employee benefit obligations, including freezing all benefits under our major pension plan, we have sought and will continue to actively seek options to de-risk our pension and OPEB obligations. During 2016, we purchased two non-participating annuity contracts with an insurance company and transferred to itActions taken in prior years include closing our pension obligations of $210.3 for certain retirees or their beneficiaries receiving pension payments. In total, we transferred the obligations for approximately 10,000 retirees or their beneficiaries to the insurance company in exchange for a similar amount of pension trust assets. In addition to reducing our costs to maintain and administer benefits, these annuity contract transactions help to lower our risk related to our pension obligations, including the risk of lower investment returns on pension trust assets and lower discount rates, which would increase long-term cash funding of the pension plan. We also amended themajor pension plan as of January 1, 2016, to allownew participants, freezing all new retirees to select a lump-sum payment option. During 2014, we provided a voluntary lump-sum settlement offer to terminated vested participants inbenefits under the pension plan and as a result reducedtransferring a portion of the pension obligation. Theobligations and related assets to an insurance company.

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Long-term pension and OPEB obligations declined by approximately $200.0 in 2017, primarily due to achieving higher pension plan paid approximately $105.0 in December 2014 out ofasset returns than our expected return assumption, contributing $44.1 to the pension trust, assets to participants.

We had no required pension contributionsand making benefit payments during 2016. Pension benefits under our major pension plan are frozen, but the plan is still underfunded. As a result, weyear. We will be required to make contributions to theour major underfunded plan’s pension trust of varying amounts until it is fully funded, and some of these contributions could be substantial. We haveare required to make approximately $45.0$51.0 of required annual pension contributions for 2017.in 2018. Based on current actuarial assumptions, we expect to make required annual pension contributions of approximately $60.0$35.0 for 20182019 and $75.0$10.0 for 2019.2020. The amount and timing of future required contributions to the pension trust depend on assumptions about future events. The most significant of these assumptions are the future investment performance of the pension funds, actuarial data about plan participants and the interest rate we use to discount benefits to their present value. Required contribution payments are more dependent on plan asset returns than in the past. Because of the variability of factors underlying these assumptions, including the possibility of future pension legislation or increased pension insurance premiums, the reliability of estimated future pension contributions decreases as the length of time until we must make the contribution increases. We changed our assumption for future expected returns on plan assets to 7.00% from 7.25%, effective January 1, 2018. This change will reduce our pension income in 2018 from 2017 by approximately $6.0.

We provide healthcare benefits to a significant portion of our employees and retirees. OPEB benefits have been either eliminated for new employees or are subject to caps on the share of benefits we pay. Based on the assumptions used to value other postretirement benefits, primarily retiree healthcare and life insurance benefits, annual cash payments for these benefits are expected to be in a range that trends down from $40.0$38.8 in 20172018 to $11.6$10.1 over the next 30 years.

In recent years, we have made multiple advances in reducing and de-risking our pension obligations. During 2016, we transferred to a highly rated insurance company $210.3 of pension obligations for approximately 10,000 retirees or their beneficiaries, which collectively represented approximately 36% of the total pension plan participants receiving payments. As part of these transactions, we transferred a similar amount of pension trust assets to purchase two non-participating annuity contracts that require the insurance company to pay the transferred pension obligations to the pension participants.

Off-Balance Sheet Arrangements

There were no material off-balance sheet arrangements as of December 31, 2016.2017.

Selected Factors that Affect Our Operating Results

Automotive Market

We sell a significant portion of our flat-rolled carbon and stainless steel flat-rolled and tubular products directly to automotive manufacturers and tiertheir Tier 1 suppliers, as well as to distributors, service centers and converters who in some cases resell the products to the automotive industry. We concentrate our carbon and stainless sales on the automotive market because these customers demand steels that are difficult to make and require the highest quality standards, just-in-time delivery, collaborative technical and customer support, and innovative products. In addition, certain competitors do not have the capability to supply all of the products that we make for our automotive customers, such as steel for exposed automotive applications and the most advanced grades of AHSS. These exacting conditions for servicing the automotive market generally enable us to seek higher selling prices than sales of more commodity types of carbon and stainless steels to other markets. Because the automotive market is an important element of our business and growth strategy, North American light vehicle production has a significant impact on our total sales and shipments. In 2016, the North American automotive industry continued to show improvement over 2015, as light vehicle production topped 17.8declined slightly to approximately 17.1 million units, whichrepresenting a 3% decrease from the prior year, but the decline was a 2% increase from 2015. The continued strengthmore significant in the automotive marketUnited States and Canada, where most of our increased share of that market collectively increasedsteel is used. As a result, our sales andsteel shipments to that market in 2016. Light vehicle sales are projected to be flat or even contract slightly in 2017, but our objective is to deepen our penetration into the automotive market with our differentiated, high-value products.

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Our goal to increase sales to the automotive industry faces potential challenges. Automotive manufacturers are under pressuredeclined 10% primarily as a result of the market decline and automotive manufacturers’ earlier plans to achieve heightened federally mandated fuel economy standards through 2025 (the Corporate Average Fuel Economy, or “CAFE,” standards), and they are currently testing alternatives to traditional carbon steels, including aluminum and otheruse more alternative materials. This could reduce

Substantially all of Precision Partners’ revenue is from the aggregate volume of steel consumedautomotive market. Its revenue from stamped components in 2017 was also impacted by the automotive industry, and impact our share of that volume. To address this threat, we and others in the steel industry have been working to create new AHSS for vehicle designs, which will enable automotive manufacturers to achieve their desired lightweighting goals without converting to aluminum or other alternative materials. We are also developing leading-edge grades of AHSS for the exposed panels of vehicles, providing weight reduction levels that are similar to aluminum at a lower cost. We currently produce virtually every grade of AHSS used today in automotive designs and are developing the next generations of AHSS to provide even greater formability. In fact, we believe that we are currently the only domestic steel company that has produced a true third-generation AHSS product, which has groundbreaking attributes that may afford automotive manufacturers unique opportunities for designing future platforms of vehicles.

Specialty Stainless Steel Market

We focus our stainless steel sales on higher-margin, value-added chrome products, particularly for the automotive industry. We are a major stainless steel supplier to the automotive market by producing many of the most challenging stainless products at the highest quality levels while supplying customers with collaborative technical support and innovative new offerings. We also sell some commodity stainless steel products. In 2015, that market experienced a surge in what we believe were unfairly traded imports of stainless steel products, causing excess inventories and a decline in pricing. In addition, the commodity chrome nickel market suffered from a precipitous fall in nickel prices. Because of the resulting excess supply and decline in pricing, we lowered our shipments and exposure to the commodity market in 2015 and in 2016 initiated AD and CVD trade cases against Chinese imports of stainless steel. The Commerce Department has assessed significant preliminary duties against Chinese stainless steel imports, causing a partial recovery in stainless steel pricing during 2016. The stainless steel trade case continues to progress and we expect it to conclude during the first quarter of 2017. See Trade Cases in Note 10 to the consolidated financial statements for more information.

Electrical Steel Market

We are a global leader in producing the highest-quality electrical steel products. We sell our electrical steel products, which are iron-silicon alloys with unique magnetic properties, primarily to manufacturers of power transmission and distribution transformers and electrical motors and generators in the infrastructure and manufacturing markets. We sell these products both domestically and internationally. We focus on the high-end of the electrical steel market, as grain-oriented electrical steel (“GOES”) is technically challenging to produce and typically commands a higher selling price than grades of non-oriented electrical steel. In the first quarter of 2016, we completed a capital investment at Butler Works to increase our GOES production capabilities.

We believe the superior efficiency of our GOES products, and particularly our TRAN-COR® family of GOES products, is attractive to customers in markets with increasing efficiency standards, such as Europe and the United States. In January 2016, new higher efficiency standards for distribution transformers went into effect in the United States, which strengthened the domestic demand for GOES products. However, electrical steel pricing declined in many international markets, which has invited a higher level of imports into the United States and threatens domestic electrical steel pricing. As a result, we continue to assess various alternatives to ensure that foreign producers of GOES are required to comply with U.S. trade laws, including encouraging the vigorous enforcement of existing laws and regulations. We also continue to explore new innovations to our electrical steel products, ensuring they remain sufficiently differentiated from market competition.light vehicle production.

Carbon Steel Spot Market

We intentionally and substantially reduced our sales and shipments of lower-margin carbon steel to the spot market in 2017 and 2016. In recent years, including most of 2015,Before 2016, a significant percentage of our sales and shipments of carbon steel were made into the domestic spot market. Generally, sales into the carbon steel spot market are sold at prevailing market prices, which can be highly volatile, and can be subject to intense competition from both low-cost domestic producers and cheap, unfairly traded foreign imports. Fluctuations in spot market prices have a direct effect on our results and are driven by factors mostly outside our control. In addition, the spot market price fluctuations do not always directly correlate with our raw material and energy costs and consequently we have limited ability to pass through increases in costs to customers absent increases in the market price.

Carbon steel imports into the domestic market peaked at the end of 2014, causing hot-rolled steel market prices to drop over 42% during 2015. We believe that this dramatic price decline was principally the result of a large increase in unfairly-traded imports of carbon steel that entered the U.S. supply chain during the second half of 2014 and much of 2015. In addition, we believe that weakness in the oil and gas markets due to the substantial decline in energy prices during 2015 encouraged our competitors to re-direct their production capacity to the carbon steel spot market, adding supply to that market and further lowering prices. In response to the challenges facing the carbon steel spot market, in late 2015 we implemented a strategy to reduce our exposure to that market. The most important action to implement this strategy was our decision to temporarily idle the Ashland Works Hot End, which allowed us
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to reduce our exposure to lower-margin, commodity steel products and focus our product mix on value-added steel products with better margins. During the quarter ended December 31, 2017, we recognized a non-cash asset impairment charge of $75.6, primarily related to the long-lived assets associated with the Ashland Works Hot End. The Ashland Works Hot End remains temporarily idled due to continued uncertaintyon temporary idle and no determination has been made regarding the long-term status of steel market conditions (including the longer-term outlook for import levels) and our ability to earn an appropriate return on its operations.

Innovation
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Specialty Electrical and Product DevelopmentStainless Steel Markets

We have been increasing our investment in researchare a leading manufacturer of grain-oriented electrical steel (“GOES”) and innovation. One of our principal strategies is to invest our time and resources to produce differentiated products that allow us to move up the value chain and serve both the current needs of our customers and the challenges they will face in the future. Our automotive customers have incorporated into their products our AHSS grades, such as Dual Phase 780 and 980, for both stamped and roll-formed parts. Our ULTRALUME® Press Hardenable Steel is an aluminum-silicon alloy coated steel our customers depend on when they require high strength parts with complex geometries. Theseother electrical steels, which are partwe sell to customers primarily in North America and Europe. We have experienced a substantial decline in shipments to international markets due to global overcapacity and both direct and indirect effects of our AHSS portfolio, enable automotive manufacturers to reduce vehicle weight while continuing to keep pace with critical safety requirements.

European and Chinese trade actions. In addition, we continue to develop new and improveddeclines in electrical steel products for our customersshipments within North America are also occurring due to use for electricity transmission and distribution and hybrid/electric vehicles, as well as stainless steel and other specialty products for automotive and other markets. We believe these strategic initiatives and commitments to research and innovation will enhance our competitive advantage and positionsubstantial increases in growing customer markets.

Next-Generation Advanced High Strength Steelsimports.

We continue our developmentare also a leading manufacturer of new and improved products that exceed our customers’ exacting standards, focusingvalue-added stainless steel, primarily for the automotive market. Stainless steel is typically priced based on Next-Generation AHSSa system of surcharges to serve future automotive industry needs. Our goal isreflect changes in the cost of certain raw materials. Thus, while we expect revenues will generally offset changes in costs, there may be a timing lag from the change in costs in one period to ensure that our AHSS reduce the weight of automobile structural body components, while maintaining the strength characteristics valued by our customers. We are enabling our automotive customers to use our innovative steel products to help achieve vehicle weight savings for ambitious fuel efficiency standards while avoiding the significant capital costs to re-design production facilities that alternative materials require.

change in revenue in a different period. In the fourth quarter of 2016,2017, we commissionedannounced and began implementing a state-of-the-art hot-dip galvanizing line upgrade project at Dearborn Works with furnace technology that allows it to produce coated and cold-rolled Next-Generation AHSS on the same line. We have completed our investment, and are now testing the specialized heating and cooling processmonthly stainless steel surcharge for all stainless steel product shipments in order to produce AHSS materialsrecover our significantly increased costs for our customers in early 2017.

In August 2016, we launched NEXMET high-strength steels, an innovative family of steels for use in lightweighting in the automotive industry. NEXMET high-strength steels are the first of our planned new technologies that will produce improved formability at high strength levels and provide greater lightweighting opportunities for our automotive customers. In 2016, we introduced NEXMET 440EX, an exposed high strength steel that provides lightweighting opportunities in exposed automotive body panels. Our goal is to provide NEXMET 1000 and 1200 AHSS trial material to our customers in early 2017 for evaluation and qualification.

Third-Generation Advanced High Strength Steels

Looking beyond Next-Generation AHSS products, we continue to push our innovation efforts toward groundbreaking steel technologies, including collaborations with other companies. In April 2016, our joint development partner, NanoSteel Company, Inc., announced that we delivered Third-Generation AHSS (“3rd Gen AHSS”) to General Motors Corporation for testing. Since then, we have expanded the evaluation and testing of trial material to other original equipment manufacturers. This 3rd Gen AHSS, produced at our facilities using proprietary production methods, possesses a unique combination of strength and formability at high ultimate tensile strength,graphite electrodes, which we believe representsare being driven principally by a leaptightening supply in performance over both currentChina of needle coke, an important raw material for graphite electrodes.

Trade Cases

Section 232 Investigation of Imported Foreign Steel

On April 19, 2017, the Commerce Department initiated an investigation pursuant to Section 232 of the Trade Expansion Act, as amended by the Trade Act of 1974 (“Section 232”), into whether imports of foreign steel into the U.S. pose a threat to U.S. national security. On January 11, 2018, the Commerce Department delivered a report to the President making recommendations as a result of its Section 232 investigation. This report has not been publicly released. Within 90 days of receiving the report, the President is expected to determine the nature and Next-Generation AHSS products.duration of any actions to be taken to ensure that imports of foreign steel will not threaten to impair U.S. national security. Such actions may include, without limitation, quotas, tariffs, fees or other measures as a means of adjusting the threatening imports. We anticipatestrongly support these actions and we have and will continue to cooperate with the investigation to the fullest extent.

Coated Steel

On June 3, 2015, we, along with five other domestic producers, filed anti-dumping (“AD”) and countervailing duty (“CVD”) petitions against imports of corrosion-resistant (“Coated”) steel from China, India, Italy, South Korea and Taiwan. The petitions alleged that Next-Generationunfairly traded imports of Coated steel from those five countries are causing material injury to the domestic industry. On May 25, 2016, the Commerce Department announced final affirmative determinations that (a) imports of Coated steel from China, India, Italy, South Korea and 3rd Gen AHSSTaiwan are being sold at less-than-fair-value and should be subject to final AD duties, and that (b) imports of Coated steel from China, India, Italy and South Korea are benefiting from government subsidies and should be subject to CVD duties. After correcting certain ministerial errors, the Commerce Department calculated final dumping and subsidy margins as follows:
Country Coated Steel CVD Margins Coated Steel AD Margins
China 241.07% – 39.05% 209.97%
India 29.49% – 8.00% 4.43% – 3.05%
Italy 38.51% – 0.00% 92.12% – 12.63%
South Korea 1.19% – 0.00% 47.80% – 8.75%
Taiwan 0.00% 10.34%

On June 24, 2016, the ITC determined that the domestic steel industry is materially injured by reason of imports of Coated steel from China, India, Italy, South Korea and Taiwan that are sold in the United States at less than fair value and that such products are subsidized by the governments of China, India, Italy and South Korea. As a result of the Commerce Department’s and the ITC’s final determinations, importers are required to post cash deposits with the U.S. government on imports of Coated steel from China, India, Italy, South Korea and Taiwan at the above CVD margins and AD margins. AD and CVD measures remain in effect for a minimum of five years.

Several of the named countries have filed appeals of the final determinations on Coated steel with the Court of International Trade (“CIT”). On January 23, 2018, the CIT issued a decision reversing and remanding to the Commerce Department its final determination on AD margins for subject Taiwanese producers. The Commerce Department must issue a remand decision within 90 days of the CIT decision. We intend to request that the Commerce Department issue a remand decision that supports the AD duties previously applied against the Taiwanese producers. We will enable automotive manufacturerscontinue to stampvigorously oppose this and form auto parts using traditional manufacturing methods withoutall other appeals of the additional infrastructure investment that would be required for aluminum and other competing materials.final affirmative determinations on imports of Coated steel.

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On September 23, 2016, we and other domestic producers made a filing with the Commerce Department asserting that Chinese steel producers are attempting to circumvent the AD and CVD duties discussed above by transshipping Chinese steel through Vietnam for minor processing before importing Coated steel into the U.S. market. Our filing requests that the Commerce Department find that imports of Vietnamese Coated steel that originated in China be subjected to the same AD and CVD duties of shipments of Coated steel imported directly from China. On December 5, 2017, the Commerce Department announced preliminary affirmative rulings that Coated steel imported from Vietnam produced from steel that originated in China is circumventing existing AD and CVD orders on Coated steel imported from China. The Commerce Department instructed the U.S. Customs and Border Protection (the “CBP”) to begin collecting cash deposits on all imports of Coated steel produced in Vietnam using Chinese-origin steel. The CBP began collecting AD and CVD cash deposits on imports of such Coated steel produced in Vietnam at rates of 199.43 and 39.05 percent, respectively. These cash deposit rates were previously established in the trade case investigation on Coated steel from China. Duties apply to all shipments entering the United States on or after November 4, 2016, the date the circumvention inquiries were initiated, that remain unliquidated.

Cold-Rolled Steel

On July 28, 2015, we, along with four other domestic producers, filed AD petitions against imports of cold-rolled steel from Brazil, China, India, Japan, the Netherlands, Russia, South Korea and the United Kingdom, as well as CVD petitions against imports of cold-rolled steel from Brazil, China, India, Russia and South Korea. The petitions alleged that unfairly traded imports of cold-rolled steel from those eight countries are causing material injury to the domestic industry. On May 17, 2016, the Commerce Department announced its final affirmative determinations that (a) imports of cold-rolled steel from China and Japan are being sold at less-than-fair-value and should be subject to final AD duties and that (b) imports of cold-rolled steel from China are benefiting from government subsidies and should be subject to CVD duties. On July 21, 2016, the Commerce Department announced its final affirmative determinations that (a) imports of cold-rolled steel from Brazil, India, Russia, South Korea and the United Kingdom are being sold at less-than-fair-value and should be subject to final AD duties and that (b) imports of cold-rolled steel from Brazil, India, Russia and South Korea are benefiting from government subsidies and should be subject to CVD duties. After correcting certain ministerial errors, the Commerce Department calculated final dumping and subsidy margins as follows (the below chart does not include the margins determined for Russia because the ITC determined that the imports of cold-rolled steel are negligible, as further discussed below):
Country Cold-Rolled CVD Margins Cold-Rolled AD Margins
Brazil 11.31% – 11.09% 35.43% – 19.58%
China 256.44% 265.79%
India 10.00% 7.60%
Japan NA 71.35%
South Korea 59.72% – 3.89% 34.33% – 6.32%
United Kingdom NA 25.17% – 5.40%

On June 22, 2016 and September 2, 2016, the ITC announced its final determinations that the domestic steel industry is materially injured by reason of imports of cold-rolled steel from Brazil, China, India, Japan, South Korea and the United Kingdom. The ITC determined that imports of cold-rolled steel from Russia that are sold in the United States at less-than-fair-value and subsidized by the government of Russia are negligible and terminated the investigations as to Russia. However, in October 2016, we and other domestic steel producers filed an appeal with the CIT appealing the ITC’s determination on Russian CAFE Standardscold-rolled steel.

Our extensive product portfolio encompassing carbon, stainlessAs a result of the Commerce Department’s and electrical steel products positions usthe ITC’s final determinations, importers are required to collaboratepost cash deposits with U.S. automotive manufacturers to assist their ongoing efforts to meet the CAFE standards. The CAFE standards generally require automobile manufacturers to meet an average fuel economy of 54.5 miles per gallon across the fleet of vehicles they produce by the year 2025, with certain milestones to be met in the interim periods. In January 2017, the U.S. government renewed its commitmenton imports of cold-rolled steel from Brazil, China, India, Japan, South Korea and the United Kingdom at the above CVD margins and AD margins. AD and CVD measures remain in effect for a minimum of five years.

Several of the named countries have filed appeals of the final determinations on cold-rolled steel with the CIT. We will oppose all appeals vigorously.

On September 27, 2016, we and other domestic producers made a filing with the Commerce Department asserting that Chinese steel producers are attempting to circumvent the AD and CVD duties discussed above by transshipping Chinese steel through Vietnam for minor processing before importing cold-rolled steel into the U.S. market. Our filing requests that the Commerce Department find that imports of Vietnamese cold-rolled steel that originated in China be subjected to the 2025 CAFE standards. We are working very closely with our automotive customerssame AD and their suppliersCVD duties of shipments of cold-rolled steel imported directly from China. On December 5, 2017, the Commerce Department announced a preliminary affirmative ruling that cold-rolled steel imported from Vietnam produced from steel that originated in the China is circumventing existing AD and CVD orders on cold-rolled steel imported from China. The Commerce Department instructed U.S. Customs and Border Protection to develop and produce a varietybegin collecting cash deposits on all imports of products across our portfolio to support their achievementcold-rolled steel produced in Vietnam using Chinese-origin steel. CBP began
Table of the CAFE standards. These efforts include, for example:Contents

electrical steels for motorscollecting AD and CVD cash deposits on imports of such cold-rolled steel produced in Vietnam at rates of 265.79 and 256.44 percent, respectively. These cash deposit rates were previously established in the next generationsprior trade case investigation on cold-rolled steel from China. Duties apply to all shipments entering the United States on or after November 4, 2016, the date the circumvention inquiries were initiated, that remain unliquidated.

Hot-Rolled Steel

On August 11, 2015, we, along with five other domestic producers, filed AD petitions against imports of hybridhot-rolled steel from Australia, Brazil, Japan, the Netherlands, South Korea, Turkey and electrical vehicles;the United Kingdom, as well as CVD petitions against imports of hot-rolled steel from Brazil, South Korea and Turkey. The petitions alleged that unfairly traded imports of hot-rolled steel from those seven countries are causing material injury to the domestic industry. On August 5, 2016, the Commerce Department announced its final affirmative determinations that (a) imports of hot-rolled steel from Australia, Brazil, Japan, the Netherlands, South Korea, Turkey and the United Kingdom are being sold at less-than-fair-value and should be subject to final AD duties and that (b) imports of hot-rolled steel from Brazil and South Korea are benefiting from government subsidies and should be subject to CVD duties. After correcting certain ministerial errors, the Commerce Department calculated final dumping and subsidy margins as follows:
stainless steels with increased corrosion resistance for use in exhaust systems and other components associated with hotter-burning engines that provide increased fuel economy; and
Country
Next-Generation and 3rd Gen AHSS with high strength and formability, which will provide significant opportunities for lightweighting, thereby providing manufacturers similar overall reduction in weight relative to aluminum at a much lower cost.
Hot-Rolled CVD MarginsHot-Rolled AD Margins
AustraliaNA29.58%
Brazil11.30% – 11.09%34.28% – 33.14%
JapanNA7.51% – 4.99%
NetherlandsNA3.73%
South Korea58.68% – 3.89%9.49% – 4.61%
TurkeyNA6.77% – 4.15%
United KingdomNA33.06%

On September 12, 2016, the ITC announced its final determinations that the domestic steel industry is materially injured by reason of imports of hot-rolled steel from Australia, Brazil, Japan, the Netherlands, South Korea, Turkey and the United Kingdom. As a result of the Commerce Department’s and the ITC’s final determinations, importers are required to post cash deposits with the U.S. government on imports of hot-rolled steel from Australia, Brazil, Japan, the Netherlands, South Korea, Turkey and the United Kingdom at the above CVD margins and AD margins. AD and CVD measures remain in effect for a minimum of five years.

The final determinations on hot-rolled steel have been appealed to the CIT. We intend to oppose all appeals vigorously.

Stainless Steel

On February 12, 2016, we, along with three other domestic producers, filed AD and CVD petitions against imports of stainless steel from China. On February 2, 2017, the Commerce Department announced its final affirmative determinations that imports of stainless steel from China (a) are being sold at less-than-fair-value and should be subject to final AD duties, and (b) are benefiting from government subsidies and should be subject to CVD duties. The Commerce Department calculated final dumping and subsidy margins as follows:
CountryStainless CVD MarginsStainless AD Margins
China190.71% – 75.60%76.64% – 63.86%

On March 3, 2017, the ITC announced its final unanimous determinations that the domestic steel industry is materially injured by reason of imports of stainless steel sheet and strip from China. As a result of the Commerce Department’s and ITC’s final determinations, importers will be required to post cash deposits with the U.S. government on imports of stainless steel sheet and strip from China at the above CVD and AD margins. AD and CVD measures remain in effect for a minimum of five years.

In addition, on July 25, 2017, the ITC held the final hearing on its five-year “sunset” review of the outstanding orders on stainless steel sheet and strip from Japan, Korea and Taiwan. On August 30, 2017, the ITC announced final determinations favorable to the U.S. steel industry. As a result of the ITC’s final determinations, the existing AD orders on imports from Japan, Korea and Taiwan and the existing CVD order on imports of the subject stainless steel sheet and strip products from Korea will remain in place for an additional five years.

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Research, Innovation and Operations

We are aligning, enhancing and using our production resources to invest in innovation, reduce operating costs and modify production capacity for innovative and higher-margin carbon, electrical and stainless steel grades at all locations. As part of our underlying strategy to focus on higher-value materials and minimize exposure to commodity products, our investment in research and innovation during the past three years has been $28.1, $28.3 and $27.6 in 2017, 2016 and 2015. In addition, we acquired the Research and Innovation Center capital lease for $26.6 in October 2017.

Over 100 membersIn 2016, we completed a strategic upgrade of our state-of-the-art hot-dip galvanizing line at our Dearborn Works. Enhanced furnace technology and modifications to the line’s configuration expanded innovation teamthe line’s capabilities to also operate as a continuous anneal line. As a result, we began producing both coated and cold-rolled Next-Generation AHSS products, including our recently introduced NEXMET products, on the same line as our existing steels.

Early in 2017, we celebrated the grand opening of researchers, scientists and engineers moved into theour new Research and Innovation Center in the Cincinnati/Dayton growth corridor in 2016.corridor. The Research and Innovation Center is home to over 100 members of our expanded team of researchers, scientists and engineers. The new facility replaces our former research facility in Middletown, Ohio, and supports our innovation team to expand its leading-edge research, applications engineering, advanced engineering, product development and customer technical services. The facility includesfeatures prototype laboratories, analytical laboratories, collaborative spaces, pilot lines and features new operational simulators that replicate critical steel manufacturing operations, helping us pursue our innovation initiatives.

Raw Materials and Supplies

Iron Ore Pricing

Iron ore is one of the principal raw materials required for our steel manufacturing operations. We purchased approximately 6.96.3 million tons of iron ore pellets in 20162017 and expect to purchase a similar amountapproximately 6.5 million tons in 2017.2018. We make most of our purchases of iron ore at negotiated prices under multi-year agreements. For 2017,2018, we expect to purchase most of our iron ore from one supplier. The price we pay for iron ore is affected by a variety of factors under the terms of our contracts, including measures of general industrial inflation and steel prices and a variable-price mechanism that adjusts the annual average price we pay for iron ore based on reference to an iron ore index referred to as the “IODEX”. A change in one of more of the factors upon which our iron ore price is determined (whether that may be the IODEX, inflation, steel prices or other indices) typically affects to varying degrees the price we pay for iron ore. Thus, the actual impact on us from a change in these factors will vary depending on the percentage of the total iron ore we purchase under each contract and how much each factor is weighted for pricing under each contract. The prices we pay for iron ore are less dependent on the IODEX than in prior years as a result of our termination of the pellet offtake agreement with Magnetation and the pricing terms in our current iron ore supply agreements.related contracts. In addition, the total net cost we pay for iron ore is affected by our hedging activities, which are described below.

In addition to integrated risk strategies, we use derivative financial instruments to manage iron ore price risk that we cannot mitigate through our customer contracts. We use derivative instruments to reduce our exposure if iron ore costs increase, but these instruments can also reduce potential benefits if iron ore costs decline. We employ a systematic approach in our hedging strategy to mitigate iron ore exposure. We hedge a higher proportion of our near-term iron ore exposure and a lower proportion for our longer-term exposure through a combination of swaps and options. As of December 31, 2016,2017, we have hedged the IODEX component for a portion of our iron ore purchases for 20172018 and 20182019 through the use of iron ore derivatives with notional amounts of 1,550,0001,465,000 tons and 1,005,000875,000 tons. Our hedging activities further reduce our exposure to changes in the IODEX on the total cost we pay for iron ore. The termination in

During late 2016, of thewe terminated our iron ore pellet offtake agreement with Magnetation, affected the accounting treatment ofwhich caused our existing iron ore derivatives contracts.to no longer meet the accounting criteria for hedge accounting treatment. As a result, of the termination, we were required to discontinue designatingnow account for those derivatives contracts as hedging instruments, and we immediately recognizeon a mark-to-market basis with immediate recognition of changes in the fair value of the derivative contracts in earnings when the change occurs, instead of when we recognize the underlying cost of iron ore, thus potentially increasing the volatility of our results of operations. See This volatility does not affect the ultimate gains or losses on the derivative contracts we will recognize in the financial statements, but only the timing of recognition.

Commodity Price RiskElectrodes

During 2017 we began to experience rapidly rising costs for graphite electrodes, which we believe are being driven principally by a tightening supply in China of needle coke, an important raw material for graphite electrodes. We believe increasing costs are likely to continue into 2018 until supply-side factors are resolved. Because we and other stainless steel producers use graphite electrodes to produce stainless steel products, the rising electrode costs can have a detrimental impact on financial results. Therefore, in October 2017 we began to implement an electrode surcharge for our shipments of stainless steel products. This surcharge has been implemented with both contract and spot market customers of stainless steel.

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Acquisition of Precision Partners

On August 4, 2017, we acquired 100% of the equity of Precision Partners, which provides advanced-engineered solutions, tool design and build, hot- and cold-stamped steel components and complex assemblies for the automotive market. Founded in 1955, Precision Partners is headquartered in Ontario, Canada, and has more than 1,000 employees, including approximately 300 engineers and skilled tool makers, across eight plants in Ontario, Alabama and Kentucky. Precision Partners specializes in manufacturing lightweight, complex components and assemblies, and it offers a broad portfolio of highly-engineered solutions. Among other benefits, we believe this strategic acquisition will:

complement our core focus on product innovation, accelerating the development and introduction of existing and new AHSS and PHS to the high-growth automotive lightweighting space;
provide a fully integrated downstream platform that further strengthens our close collaboration with our automotive customers and their Tier 1 suppliers; and
leverage our expertise in metals forming with Precision Partners’ expertise in tool design and advanced product design-engineering capabilities in hot and cold stamping.

With our acquisition of Precision Partners, we have added a well-respected supplier to our core automotive market whose business has commanded higher margins with less capital intensity. Importantly, we believe that our addition of Precision Partners has the potential to dramatically accelerate our efforts to drive adoption of our innovative steel products by automotive manufacturers and their Tier 1 suppliers. Our steelmaking experts and Precision Partners’ engineers have already begun numerous collaboration projects aimed at achieving this goal, as Precision Partners’ expertise in tool design and stamping capabilities has allowed us to deliver to customers fully formed prototypes of automotive components utilizing our innovative steel products. As such, we are now able to provide true component solutions through prototype automotive parts, rather than attempting to showcase our advanced steels to customers through computer models and flat-rolled steel samples, as in the past. This approach has and will continue to demonstrate to customers that they can significantly lightweight automotive parts on an accelerated timeline by using our high-strength, highly formable grades of steel in place of traditional lower-strength grades. In addition, these collaborative projects are enhancing Precision Partners’ knowledge and experience in tool design and build, and stamping of new, advanced grades of steel, enabling it to provide expert solutions to automotive customers now and in the future.

Labor Agreements

At December 31, 2017, we employed approximately 9,200 people, of which approximately 5,700 are represented by labor unions under various contracts that expire between 2018 and 2021.

Several labor agreements were ratified in Item 7A, Quantitative2017. In the first quarter of 2017, members of the United Steel Workers, Local 169, ratified a labor agreement covering approximately 305 hourly employees at Mansfield Works. The new agreement expires March 31, 2021. In the third quarter of 2017, members of the United Auto Workers, Local 3044, ratified a labor agreement covering approximately 330 hourly employees at our Rockport Works. The new agreement expires September 30, 2021. In the fourth quarter of 2017, members of the United Steel Workers, Local 1915, ratified a labor agreement covering approximately 90 hourly employees at the Walbridge, Ohio facility with our wholly-owned subsidiary AK Tube LLC. The new agreement is effective January 22, 2018 and Qualitative Disclosures about Market Risk for further information.expires January 22, 2021. In the fourth quarter of 2017, members of the United Auto Workers, Local 600, ratified a labor agreement covering approximately 1,170 hourly employees at our Dearborn Works. The new agreement expires July 31, 2021.

The current agreement with the International Association of Machinists and Aerospace Workers, Local 1943, which represents approximately 1,725 hourly employees at our Middletown Works, expires on March 15, 2018. The agreement with the United Steel Workers, Local 1865, which represents approximately 305 hourly employees at our Ashland Works, expires on September 1, 2018.

Potential Impact of Climate Change Legislation

On an ongoing basis we assess the potential impacts and implications of climate change and associated legislation and regulation on our business, operations, customers, suppliers, markets and other relevant areas. In 2010, the EPA issued a final “tailoring rule” providing new regulations governing major stationary sources of greenhouse gas emissions under the Clean Air Act. Generally, the tailoring rule requires that new or modified sources of high volumes of greenhouse gases must follow heightened permit standards and lower emissions thresholds. The EPA continues to work on further rules on greenhouse gas emissions rules that would apply more broadly and to lower levels of emission sources. On June 23,In 2014, the U.S. Supreme Court partially upheld and partially invalidated the tailoring rule. The decision’s impact will often require us to conduct a best
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available control technology analysis for greenhouse gases for new major projects. The tailoring rule will not materially adversely affect us in the near term and we cannot reliably estimate the regulation’s long-term impact. However, there are a number of factors that may affect us, including the EPA’s tailoring rule and other similar regulations, such as the EPA’s Clean Power Plant Rule established on August 3, 2015, implications from the proposed “Paris Agreement”Paris Climate Agreement arising from the 2015 United Nations Climate Change Conference (which remains subject to Congressional ratification) or similar accords relating to climate change. These and other
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factors will likelycould cause us to suffer negative financial impacts over time from increased energy, environmental and other costs needed to comply with the limitations that our suppliers would be imposedimpose on us directly or indirectly throughindirectly.

In 2017, the EPA announced its intention to repeal the Clean Power Plant Rule and the U.S. State Department gave formal notice of its intent to withdraw from the Paris Climate Agreement. The earliest date for the United States to completely withdraw from the Paris Agreement is November 4, 2020. Given these recent developments, we expect the near-term negative impacts to our suppliers.business directly arising from climate change legislation to be low. However, we do not expect the potential challenges to our business arising from climate change to decline in the long term, and we do not expect our key customers in our principal markets to substantially reduce their focus on climate change-related issues. This is particularly true for our automotive manufacturer customers, who remain subject to CAFE standards and other regulations aimed at reducing vehicle emissions. In addition, automotive manufacturers typically design light vehicle platforms for multiple international markets, so other countries’ climate change legislation and regulations that govern the automotive manufacturers likely will continue to affect their approach for the U.S. market.

In addition, the possibility exists that further limitations on greenhouse gas emissions may be imposed in the United States in the future through some form of federally-enacted legislation or by additional regulations.regulations in the U.S. may further impose limitations on greenhouse gas emissions. In the past, bills have been introduced in the United States Congress that aim to limit carbon emissions over long periods from facilities that emit significant amounts of greenhouse gases. Such bills, if enacted, would apply to the steel industry, in general, and to us, in particular, because producing steel from elemental iron creates carbon dioxide, one of the targeted greenhouse gases. Although we and other steel producers in the United States are actively participating in research and development to develop technology, processes and approaches for lower-emission steelmaking processes, developingreducing greenhouse gas emissions, these technologiesdevelopments will take time and nobody canit is impossible to predict when or if, theyto what degree these efforts will be successful. To address this need for developing new technologies, approaches and processes, not just in the steel industry but elsewhere, some of the proposed legislative bills includehave been introduced in the past that included a system of carbon emission credits. Such credits which would be available to certain companies for a period, similar to the European Union’s existing “cap and trade” system. Each of these billsHowever, it is likely to be altered substantially if it moves through the legislative process, making it virtually impossible to forecast the provisions of any such final legislation and its effects on us.

If regulation or legislation regulatingto address climate change or regulate carbon emissions is enacted, however, it is reasonable to assume that the net financial impact on us will be negative, despite some potential beneficial aspectsbenefits discussed below. On balance, such regulation or legislation likely would cause us to incur increased energy, environmental and other costs to comply with the limitations that would be imposed on greenhouse gas emissions. For example, additional costs could take the form of new or retrofitted equipment or the development of new technologies (e.g., sequestration), to try to control or reduce greenhouse gas emissions.

The future enactment of climate control or greenhouse gas emissions legislation or regulation also could have some beneficial impact onproduce benefits for us which maythat would offset somewhat reduce the adverse effects noted above. For example, if climate control legislation or regulation continues to drive automotive manufacturers to meet higher fuel efficiency targets, we could benefit from increased sales of our broad portfolio of products: NOES for H/EVs, stainless steels needed for exhaust systems and other components for more efficient engines, and AHSS products to lightweight automobiles. Moreover, if climate change legislation provides further incentives for energy efficiency, up to certain levels, we could benefit from increased sales of our GOES products, which are among the most energy efficientenergy-efficient electrical steels in the world. We sell our electrical steels primarily to manufacturers of power transmission and distribution transformers and electrical motors and generators, the demand for which could grow in the eventif energy efficiency standards increase. Moreover, if climate control legislation or regulation continues to drive automotive manufacturers to meet higher fuel efficiency targets, we could benefit from increased sales of our broad portfolio of products: electrical steel for hybrid and electric vehicles, stainless steels needed for exhaust systems and other components for more efficient engines, and AHSS steels to lightweight the exterior and bodies of automobiles. In addition, climate control legislation may enhance sales of our products in different ways. For instance, if the legislation promotes the use of renewable energy technology, such as wind or solar technology, it could increase demand for our high-efficiency electrical steel products used in power transformers, which are needed to connect these new sources to the electricity grid.

Any effectThe ultimate impacts on us from any additional climate change or emissions reduction legislation or regulation would depend on the final terms of any climate controlsuch legislation or regulation enacted.regulation. Presently, we are unable to predict with any reasonable degree of accuracy when or even if climate control legislation or regulation will be enacted, or if it is, what its terms and applicability to us will be. As a result, we currently have no reasonable basis on which we canto reliably predict or estimate the specific effects any eventually enacted laws may have on us or how we may be able to reduce any negative impacts on our business and operations. In the meantime, the items described above provide some indication of the potential mixed impact on us from climate control legislation or regulation generally. We will continue to monitor the progress of such legislation and/or regulation closely.

The future impacts and effects of legislation and regulations relating to climate change, greenhouse gas emissions and other environmental matters over the coming years have become increasingly uncertain as a result of the changing political landscape following the transition to a new U.S. Presidential administration.

Labor Agreements

At December 31, 2016, we employed approximately 8,500 people, of which approximately 6,100 are represented by labor unions under various contracts that expire between 2017 and 2019.Magnetation

In 2011, we invested in a 49.9% equity interest in the third quarterMagnetation joint venture, which operated iron ore concentrate plants located in Minnesota and an iron ore pelletizing plant in Reynolds, Indiana. Through an offtake agreement, we had the right to purchase all the pellets produced by the pellet plant and an obligation to purchase a portion of 2016, membersthose pellets. On May 5, 2015, Magnetation and its subsidiaries filed voluntary petitions for relief under Chapter 11 of the United Auto Workers, Local 3303, ratified a labor agreement covering approximately 1,200 employees at Butler Works. The new agreement is scheduled to expire on April 1, 2019.

An agreementBankruptcy Code with the United Steel Workers, Local 169, which represents approximately 310 hourly employees at our Mansfield Works located in Mansfield, Ohio, is scheduled to expire on March 31, 2017.States Bankruptcy Court for the District of Minnesota.

On October 6, 2016, the Bankruptcy Court approved a Global Settlement Agreement (“Settlement Agreement”) among us, Magnetation, Magnetation Inc., and Magnetation’s revolving credit facility lenders, senior secured noteholders and debtor-in-
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Anpossession facility lenders to terminate the iron ore pellet offtake agreement with Magnetation and to wind down Magnetation’s business. Among other terms of the United Auto Workers, Local 600, which represents approximately 1,160 hourly employees atSettlement Agreement, we agreed to make a cash payment (“Termination Payment”) to Magnetation’s Chapter 11 estate in order to terminate our Dearborn Works located in Dearborn, Michigan, is also scheduled to expire on March 31, 2017.

Anofftake agreement with Magnetation and cease purchasing iron ore pellets from Magnetation. The next day, the United Auto Workers, Local 3044, which represents approximately 190 production employees at our Rockport Works locatedtransactions contemplated by the Settlement Agreement were completed and we made a Termination Payment of $36.6, thereby terminating the pellet offtake agreement. In connection with the approval of the Settlement Agreement, we recognized charges of $69.5 in Rockport, Indiana, is scheduledthe fourth quarter of 2016, consisting of the $36.6 Termination Payment and additional charges of $32.9 for remaining obligations under contracts with other third parties to expire on September 30, 2017. As of January 1, 2016, approximately 140 hourly Rockport Works maintenance employees transferredtransport pellets to our employment fromfacilities over the next 12 years. In the fourth quarter of 2017, we reached an independent contractor. We have been negotiating withagreement for transportation services that provides a timeframe to begin using the United Auto Workers forrail cars that were idled after the terms for these employeestermination of the pellet supply agreement. As a result, we recorded a credit of $19.3 during the fourth quarter of 2017 to be added toreduce the union.unpaid liability.

Critical Accounting Estimates

We prepare our financial statements in conformity with accounting principles generally accepted in the United States of America. These principles permit choices among alternatives and require numerous estimates of financial matters. Accounting estimates are based on historical experience and information that is available to us about current events and actions we may take in the future. We believe the accounting principles chosen are appropriate under the circumstances, and that the estimates, judgments and assumptions involved in financial reporting are reasonable. There can be no assurance that actual results will not differ from these estimates. We believe the accounting estimates discussed below represent those accounting estimates requiring the exercise of judgment where a different set of judgments could result in the greatest changes to reported results.

Inventory Costing

We value inventories at the lower of cost or market, and we measure the cost of the majority of inventories on the LIFO method. The LIFO method allocates the most recent costs to cost of products sold and, therefore, recognizes into operating results fluctuations in raw material, energy and other inventoriable costs more quickly than other methods. Other inventories, consisting mostly of foreign inventories and certain raw materials, are measured principally at average cost. We can only make an actual valuation of the inventory under the LIFO method at the end of the year based on inventory levels and costs at that time. Therefore, interim LIFO calculations are based on our estimates of expected year-end inventory levels and costs. Because these are affected by many factors beyond our control, annual LIFO expense or income may significantly differ from the estimated amounts calculated at interim dates.

Environmental and Legal Contingencies

We are involved in a number of environmental and other legal proceedings. We record a liability when we determine that litigation has commenced or a claim or assessment has been asserted and, based on available information, it is probable that the outcome of the litigation, claim or assessment, whether by decision or settlement, will be unfavorable and the amount of the liability is reasonably estimable. We measure the liability using available information, including the extent of damage, similar historical situations, our allocable share of the liability and, in the case of environmental liabilities, the need to provide site investigation, remediation and future monitoring and maintenance. We record accruals for probable costs based on a combination of litigation and settlement strategies on a case-by-case basis and, where appropriate, supplement those with incurred-but-not-reported development reserves. However, amounts we record in the financial statements in accordance with accounting principles generally accepted in the United States exclude costs that are not probable or that may not be currently estimable. The ultimate costs of these environmental and legal proceedings may, therefore, be higher than those we have recorded on our financial statements. In addition, changes in assumptions or the effectiveness of our strategies can materially affect results of operations in any future period.periods.

Pension and OPEB Plans

Accounting for retiree pension and healthcare benefits requires the use of actuarial methods and assumptions, including assumptions about current employees’ future retirement dates, the anticipated mortality rate of retirees,rates, the benchmark interest rate used to discount benefits to their present value, anticipated future increases in healthcare costs and our obligations under collective bargaining agreements with respect to pension and healthcare benefits for retirees. Changing any of these assumptions could have a material effect on the calculation of our total obligation for future pension and healthcare benefits.

Actuarial net gains and losses occur when actual experience differs from any of the many assumptions used to value the benefit plans or when the assumptions change, as they may each year when a valuation or remeasurement is performed. The major factors contributing to our actuarial gains and losses are changes in the discount rate used to value plan liabilities as of the measurement date and changes in the expected lives of plan participants. We believe the mortality assumptions selected for determining the expected lives of plan participants are most closely associated with the expected lives of our plan participants. However, selecting other available assumptions would likely increase the plan obligations. In addition, a major factor contributing to actuarial gains and losses for our pension plansplan is the difference between expected and actual returns on plan assets. For OPEB plans, differences in estimated
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versus actual healthcare costs and changes in assumed healthcare cost trend rates are additional factors generally contributing to actuarial gains and losses. However, we do not expect changes in these OPEB assumptions to have a material effect on us since most
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of the plans have caps on the share of benefits we pay. In addition to their effect on the funded status of the plans and their potential for corridor adjustments, these factors affect future net periodic benefit expenses. Changes in key assumptions can have a material effect on the amount of benefit obligation and annual expense we record. For example, a 25 basis point decrease in the discount rate would decrease the interest cost component of pension income in 20172018 by $4.5. A 25 basis point decrease in the discount rate would have increased the pension obligation at December 31, 2016,2017, by approximately $65.0$64.0 and the OPEB obligation by approximately $11.0. A 100 basis point decrease in the expected rate of return on pension plan assets would decrease the projected 20172018 pension income by approximately $20.8.$23.2.

Under our method of accounting for pension and OPEB plans, we recognize into income as of the measurement date, any unrecognized actuarial net gains or losses that exceed 10% of the larger of projected benefit obligations or plan assets as of the measurement date, defined as the corridor. Amounts inside the corridor are amortized over the plan participants’ life expectancy. Our method results in faster recognition of actuarial net gains and losses than the minimum amortization method permitted by prevailing accounting standards and used by the vast majority of companies in the United States. Faster recognition under this method also results in the potential for highly volatile and difficult to forecast corridor adjustments.

Asset Impairment

We have various assets that are subject to impairment testing, including equity method investments, property, plant and equipment and goodwill. If circumstances indicate that an asset has lost value below its carrying amount, we review the asset for impairment. We evaluate the effect of changes in operations and estimate future cash flows to measure fair value. We use assumptions, such as forecasted growth rates and cost of capital, as part of these analyses and our selections of the assumptions to use can result in different conclusions. We believe the data and assumptions used are appropriate in the circumstances and consistent with internal projections. The most recent annual goodwill impairment testtests indicated that the fair valuevalues of itsthe relevant reporting unit wasunits were in excess of itstheir carrying value. However, our businesses operate in highly cyclical industries and the valuation of these businesses can fluctuate, which may lead to impairment charges in future periods. Fair value is determined using quoted market prices, estimates based on prices of similar assets, or anticipated cash flows discounted at a rate commensurate with risk.

We consider the need to evaluate long-lived assets for indicators of impairment at least quarterly to determine if events or changes in circumstances indicate the carrying amount of such assets may not be recoverable. We evaluate long-lived assets for impairment based on a collective asset grouping that includes the operations of all facilities. We manage our operations as part of an “integrated process” that allows us to route production to various facilities so that we can maximize financial results and cash flows. As a result of the integrated process and our organization, cash flows are not identifiable to asset groups at a level lower than the consolidated results. If the carrying value of a long-lived asset exceeds its fair value, we determine that an impairment has occurred and we recognize a loss based on the amount that the carrying value exceeds the fair value, less cost to dispose, for assets we plan to sell or abandon.

As a result of the temporary idling of the Ashland Works blast furnace and steelmaking operation in 2015, we considered the need for an impairment of the long-lived assets and determined that no impairment was indicated based on the expected temporary nature of the idling. At the end of 2016, we updated our assessment of the need for impairment of the temporarily idled Ashland Works’ long-lived assets and determined that no impairment existsexisted since we believebelieved the idling iswas still temporary. During the quarter ended December 31, 2017, we recognized a non-cash asset impairment charge of $75.6, primarily related to the long-lived assets associated with the Ashland Works Hot End. The Ashland Works Hot End remains temporarily idled dueon temporary idle and no final determination has been made regarding the long-term status of the operations. However, we continue to continuing uncertainty regardingengage in regular reviews of the potential viability of the Ashland Works Hot End, including an assessment of the most significant risks and benefits of a permanent idling of those operations. As part of these reviews, we take into consideration, among other items, our strategic focus on reducing participation in commodity markets to position us for sustainable profitability and whether we anticipate that future market conditions will enable production from the Ashland Works Hot End to generate sustainable economic returns through steel market cycles. We now believe it is unlikely that the Ashland Works Hot End will restart in the near term based on forecasted supply and demand characteristics of the markets that we serve. Our assessment and timing of the impairment charge was influenced by our current production capacity and an updated evaluation of the risk of not reaching new labor agreements on a timely basis for key facilities. Factors that influenced our impairment determination included an uncertain global trade landscape influenced by shifting domestic and international political priorities, continued intense competition from domestic steel competitors and foreign steel competition, which we believe has been through unfair trade practices. These conditions (includingdirectly impact our pricing, which in turn directly impacts our assessment of the demand forecasts for the longer-term outlook for import levels) and our ability to earn an appropriate return on its operations.markets we serve.

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Outlook

All of the statements in this Outlook section are subject to, and qualified by, the information in the Forward-Looking Statements section.

Below are certain factors relevant to our full-year 20172018 outlook:

1)Based on our current forecast for raw material prices and anticipated inventory levels at the end of 2017,2018, we currently expect that we could incur LIFO expense for the full year of approximately $100.0.$40.0. However, raw material prices have been very volatile, and a combination of changes in raw material costs, other input costs or anticipated year-end inventory levels will affect our LIFO estimate and the amount recorded in the first quarter and full year.
2)We currently expect outage expenses for planned maintenance outages to be approximately $90.0$50.0 in 20172018 compared to $62.1$84.9 in 2016.2017. The increasedecrease is primarily due to ahigher expenses associated with the major routine planned outage scheduledoutages in the second half of 2017 at the Middletown Works blast furnace and melt shop.shop that are not expected in 2018.
3)We currently expect that expenses related to the unplanned Middletown Works incident in January 2018 will be approximately $30.0 in the first quarter of 2018.
4)We expect to record pension and OPEB income of approximately $65.0$32.0 in 2017.2018. Our required annual pension plan contribution is approximately $45.0$51.0 for 2017.
4)We estimate depreciation expense for 2017 will be similar to 2016.2018.
5)We estimate depreciation expense for 2018 will be approximately $210.0.
6)We expect that we willto record an income tax benefit for 2017,2018, primarily associated with the forecasted 20172018 LIFO expense. Cash taxes for the same period will be minimal given our net operating loss carryforward positions.
6)7)We estimate capital investments of approximately $130.0 to $150.0$160.0 in 2017.2018. This amount could be adjusted based on changes in market conditions or operational needs.
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7)8)We expect working capital to be a small usesource of cash in 2017, although we drive to keep it neutral each year.2018.

The foregoing factors are based on our current estimates and may change based on business conditions and other factors. There are many other factors that could significantly affect our 20172018 results, including developments in the domestic and global economies, in our business, and in the businesses of our customers and suppliers. Therefore, our outlook may change as a result of those and other factors.

Contractual Obligations

In the ordinary course of business, we enter into agreements that obligate us to make legally enforceable future payments. These agreements include those for borrowing money, leasing equipment and purchasing goods and services. The following table summarizes by category expected future cash outflows associated with contractual obligations we have as of December 31, 20162017.
 Payment due by period Payment due by period
Contractual Obligations 
Less
than 1
year
 1-3 years 3-5 years 
More
than 5
years
 Total 
Less
than 1
year
 1-3 years 3-5 years 
More
than 5
years
 Total
Long-term debt $
 $150.0
 $943.3
 $751.8
 $1,845.1
 $
 $157.3
 $856.2
 $1,152.0
 $2,165.5
Interest on debt (a) 138.1
 275.5
 186.8
 93.8
 694.2
 132.9
 257.2
 207.6
 198.6
 796.3
Lease obligations 16.0
 26.7
 19.1
 48.4
 110.2
 18.2
 36.9
 35.5
 90.2
 180.8
Purchase obligations and commitments 2,399.1
 3,191.4
 2,224.8
 3,226.8
 11,042.1
 2,723.7
 2,863.4
 1,992.2
 1,190.4
 8,769.7
Pension and OPEB obligations (b) 41.3
 76.7
 69.9
 947.1
 1,135.0
 40.1
 74.5
 74.3
 745.4
 934.3
Other non-current liabilities 
 52.9
 37.1
 58.4
 148.4
 
 43.4
 20.3
 97.9
 161.6
Total $2,594.5
 $3,773.2
 $3,481.0
 $5,126.3
 $14,975.0
 $2,914.9
 $3,432.7
 $3,186.1
 $3,474.5
 $13,008.2

(a)Amounts include contractual interest payments using the interest rates as of December 31, 20162017 applicable to our variable-rate debt and stated fixed interest rates for fixed-rate debt.
(b)Future cash contributions to our qualified pension trust are not included in the table above. We have approximately $45.0$51.0 of required contributions for 2017.2018. Based on current actuarial assumptions, the estimates for our contributions are approximately $60.0$35.0 for 20182019 and $75.0$10.0 for 2019.2020. Estimates of cash contributions to the pension trust to be made after 20172018 are uncertain since several variable factors impact defined benefit pension plan contributions and required contributions are significantly affected by asset returns. Because we expect the pension trust to make pension benefit payments beyond the next five years, the net pension liability is included in the More than 5 years column. We estimate benefit payments, after receipt of Medicare subsidy reimbursements, will be $40.0$38.8 for 20172018 and we expect them to trend down to $11.6$10.1 over the next 30 years. For a more detailed description of these obligations, see Note 7 to the consolidated financial statements.

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In calculating the amounts for purchase obligations, we identified contracts where we have a legally enforceable obligation to purchase products or services from the vendor or make payments to the vendor for an identifiable period. For each identified contract, we determined our best estimate of payments to be made under the contract assuming (1) the continued operation of existing production facilities, (2) normal business levels, (3) both parties would adhere to the contract in good faith throughout its term, (4) prices in the contract and (5) the effect of the Ashland Works Hot End temporary idling. Because of changes in the markets we serve, changes in business decisions regarding production levels or unforeseen events, the actual amounts paid under these contracts could differ significantly from the amounts presented above. For example, circumstances could arise which create exceptions to minimum purchase obligations in the contracts. We calculated the purchase obligations in the table above without considering such exceptions.

A number of our purchase contracts specify a minimum volume or price for the products or services covered by the contract. If we were to purchase only the minimums specified, the payments in the table would be reduced. Under “requirements contracts” the quantities of goods or services we are required to purchase may vary depending on our needs, which are dependent on production levels and market conditions at the time. If our business deteriorates or increases, the amount we are required to purchase under such a contract would likely change. Many of our agreements for the purchase of goods and services allow us to terminate the contract without penalty if we give 30 to 90 days’ notice. Any such termination could reduce the projected payments.

Our consolidated balance sheets contain liabilities for pension and OPEB and other long-term obligations. We calculate the benefit plan liabilities using actuarial assumptions that we believe are reasonable under the circumstances. However, because changes in circumstances can have a significant effect on the liabilities and expenses associated with these plans including, in the case of pensions, pending or future legislation, we cannot reasonably and accurately project payments into the future. While we do include information about these plans in the above table, we also discuss these benefits elsewhere in this Management’s Discussion and Analysis of Financial Condition and Results of Operations and in the notes to the consolidated financial statements.

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The other long-term liabilities on our consolidated balance sheets include accruals for environmental and legal issues, employment-related benefits and insurance, liabilities established for uncertain tax positions, and other obligations. These amounts generally do not arise from contractual negotiations with the parties receiving payment in exchange for goods and services. The ultimate amount and timing of payments are uncertain and, in many cases, depend on future events occurring, such as the filing of a claim or completion of due diligence investigations, settlement negotiations, audit and examinations by taxing authorities, documentation or legal proceedings.

Magnetation

In 2011, we invested in a 49.9% equity interest in the Magnetation joint venture, which operated iron ore concentrate plants located in Minnesota and an iron ore pelletizing plant in Reynolds, Indiana. Through an offtake agreement, we had the right to purchase all the pellets produced by the pellet plant and an obligation to purchase a portion of those pellets. On May 5, 2015, Magnetation and its subsidiaries filed voluntary petitions for relief under Chapter 11 of the Bankruptcy Code with the United States Bankruptcy Court for the District of Minnesota.

On October 6, 2016, the Bankruptcy Court approved a Global Settlement Agreement (“Settlement Agreement”) among us, Magnetation, Magnetation Inc., and Magnetation’s revolving credit facility lenders, senior secured noteholders and debtor-in-possession facility lenders to terminate the iron ore pellet offtake agreement with Magnetation and to wind down Magnetation’s business. Among other terms of the Settlement Agreement, we agreed to make a cash payment (“Termination Payment”) to Magnetation’s Chapter 11 estate in order to terminate our offtake agreement with Magnetation and cease purchasing iron ore pellets from Magnetation. The next day, the transactions contemplated by the Settlement Agreement were completed and we made a Termination Payment of $36.6, thereby terminating the pellet offtake agreement. In connection with the approval of the Settlement Agreement, we recognized charges of $69.5 in the fourth quarter of 2016, consisting of the $36.6 Termination Payment and additional charges of $32.9 for remaining obligations under contracts with other third parties to transport pellets to our facilities over the next 12 years. We are working on actions to mitigate our costs for these contracts, but can give no assurance that we will be successful.

We currently anticipate that we can purchase replacement iron ore pellets from third-party producers who can meet our future needs by offering superior reliability, consistent quality and more competitive pricing. In addition, we expect terminating our offtake agreement with Magnetation will allow us to benefit from enhanced flexibility with iron ore pellets. We currently anticipate that by the end of 2017 we will recoup the cost of the Termination Payment with financial benefits from cost savings and cost avoidance, including savings resulting from lower pricing of replacement iron ore pellets from other suppliers.

The offtake agreement termination will have an impact on the future accounting treatment of existing iron ore derivatives contracts. We previously designated certain derivative contracts as cash flow hedges on a portion of the Magnetation iron ore purchases. As a result of the offtake agreement termination, we discontinued designating those derivatives contracts as hedging instruments, which potentially increases the volatility of our results of operations. This volatility does not affect the ultimate gains or losses on the derivative contracts we will recognize in the financial statements, but only the timing of recognition. Changes in the fair value of the derivative contracts not accounted for as qualifying hedges for accounting purposes are immediately recognized in cost of products sold when the change in fair value occurs, instead of when we recognize costs for the underlying purchases of iron ore.

New Accounting Pronouncements

The Financial Accounting Standards Board (FASB) issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606), during the second quarter of 2014. Topic 606, as further amendedinformation called for by subsequent Accounting Standard Updates, affects virtually all aspects of an entity’s revenue recognition, including determining the measurement of revenue and the timing of when itthis section is recognized for the transfer of goods or servicesincorporated herein by reference to customers. Topic 606 is effective for us beginning JanuaryNote 1 2018. The guidance permits two methods of adoption—retrospectively to each prior reporting period presented (full retrospective method), or retrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (modified retrospective method). We currently anticipate adopting the standard using the modified retrospective method as of January 1, 2018. We are evaluating the effect of the adoption of Topic 606 on ourconsolidated financial position and results of operations.

FASB issued Accounting Standards Update No. 2016-02, Leases (Topic 842), during the first quarter of 2016. Topic 842 requires entities to recognize lease assets and lease liabilities and disclose key information about leasing arrangements for certain leases. We will be required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. Topic 842 is effective for us beginning January 1, 2019. We are currently evaluating the effect of the adoption of Topic 842 on our financial position and results of operations.

FASB issued a standard update during the first quarter of 2016 to simplify several aspects of the accounting for employee share-based payments. The new guidance requires companies to record excess tax benefits and tax deficiencies in the income statement when stock awards vest or are settled. In addition, companies will no longer separately classify cash flows related to excess tax benefits as a
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financing activity apart from other income tax cash flows. The standard also allows companies to repurchase more of each employee’s vesting shares for tax withholding purposes without triggering liability accounting, clarifies that all cash payments made to tax authorities on each employee’s behalf for withheld shares should be presented as a financing activity on companies’ cash flows statements, and provides an accounting policy election to account for forfeitures as they occur. This update is effective for us beginning January 1, 2017. We are currently evaluating the effect of the adoption of this update on our financial position and results of operations, but expect the adoption to have a minimal effect on us. We do not expect that recognizing previously unrecorded excess tax benefits will have a material effect on our results of operations since we expect to record a valuation allowance that offsets deferred tax assets generated from recognizing those benefits. We intend to elect to continue to estimate forfeitures expected to occur to determine the compensation cost we recognize each period. The presentation requirements for cash flows related to employee taxes paid for withheld shares will have no effect on us since we have historically presented these as a financing activity.

In June 2016, the FASB issued a new standard to replace the incurred loss impairment methodology with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. In connection with recognizing credit losses on receivables and other financial instruments, we will be required to use a forward-looking expected loss model rather than the incurred loss model. The new standard will be effective for us beginning January 1, 2020, with early adoption permitted beginning January 1, 2019. Adoption of this standard is through a cumulative-effect adjustment to retained earnings as of the effective date. We are currently evaluating the effect of this standard on our financial position and results of operations.statements.

Forward-Looking Statements

Certain statements we make or incorporate by reference in this Form 10-K, or make in other documents we furnishedfurnish to or file with the Securities Exchange Commission, as well as in press releases or in oral presentations made by our employees, reflect our estimates and beliefs and are intended to be, and are hereby identified as “forward-looking statements” for purposes of the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Words such as “expects,” “anticipates,” “believes,” “intends,” “plans,” “estimates” and other similar references to future periods typically identify such forward-looking statements. These forward-looking statements reflect our current beliefs and judgments, but are not guarantees of future performance or outcomes. They are based on a number of assumptions and estimates that are inherently affected bysubject to economic, competitive, regulatory, and operational risks, uncertainties and contingencies that are beyond our control, and upon assumptions with respect toabout future business decisions and conditions that may change. In particular, these include, but are not limited to, statements in the Outlook and Liquidity and Capital Resources sections and Item 7A, Quantitative and Qualitative Disclosures about Market Risk.

We caution readers that such forward-looking statements involve risks and uncertainties that could cause actual results to differ materially from those currently expected. See Item 1A, Risk Factors for more information on certain of these risks and uncertainties.

Any forward-looking statement made in this document speaks only as of the date on which it is made. We undertake no obligation to publicly update any forward-looking statement, whether as a result of new information, future developments or otherwise, except as may be required by law.

Item 7A.Quantitative and Qualitative Disclosures about Market Risk.

Our primary areas of market risk include changes in (a) interest rates, (b) commodity prices and (c) foreign currency exchange rates.

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Interest Rate Risk

We manage interest rate risk in our capital structure by issuing variable- and fixed-rate debt and by utilizing our Credit Facility, which is affected by variable interest rates. Our outstanding long-term indebtedness (excluding unamortized debt discount and premium and debt issuance costs and our capital lease) was $1,845.1$2,165.5 and $2,405.5$1,845.1 at December 31, 20162017 and 2015.2016. The amount outstanding at December 31, 2016,2017, consisted of $1,819.1$1,689.5 of fixed-rate debt and $26.0 of variable-rate IRBs. There were no$450.0 of borrowings from our Credit Facility outstanding at December 31, 2016.2017. An increase in prevailing interest rates would increase interest expense and interest paid for the variable-rate debt, including any outstanding borrowings from the Credit Facility. For example, a 1%100 basis point increase in interest rates would increase annual interest expense by approximately $0.3$4.8 on our outstanding debt at December 31, 2016.

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2017.

Commodity Price Risk

Commodity prices for certain carbon, stainless and electrical steels and raw material and energy inputs represent a source of market risk. Prices for certain raw materials and energy have been volatile over the last several years, with chrome, iron ore, natural gas, zinc, and scrap being especially volatile. We attempt to mitigate commodity price risk by aligning fixed and variable components in the following commitments:

customer pricing contracts
supplier purchasing agreements
derivative financial instruments

Some customer contracts have fixed-pricing terms, which increase our exposure to fluctuations in raw material and energy costs. To reduce our exposure, we enter annual, fixed-price agreements for certain raw materials. Some of our existing multi-year supply agreements have required minimum purchase quantities. Under adverse economic conditions, those minimums may exceed our needs. Absent exceptions for force majeure and other circumstances affecting the legal enforceability of the agreements, these minimum purchase requirements may compel us to purchase quantities of raw materials that could significantly exceed our anticipated needs or pay damages to the supplier for shortfalls. In these circumstances, we would attempt to negotiate agreements for new purchase quantities. There is a risk, however, that we would not be successful in reducing purchase quantities, either through negotiation or litigation. If that occurred, we would likely be required to purchase more of a particular raw material in a particular year than we need, negatively affecting our results of operations and cash flows.

In many cases, our customer contracts do not include variable-pricing mechanisms that adjust selling prices in response to changes in the costs of certain raw materials and energy, though some of our customer contracts include such mechanisms. We may enter multi-year purchase agreements for certain raw materials with similar variable-price mechanisms, allowing us to achieve natural hedges between the customer pricing contracts and supplier purchasing agreements. Therefore, in some cases price fluctuations for energy (particularly natural gas and electricity), raw materials (such as scrap, chrome, zinc and nickel) or other commodities may be, in part, passed on to customers rather than absorbed solely by us. There is a risk, however, that the variable-price mechanisms in the sales contracts may not necessarily change in tandem with the variable-price mechanisms in our purchase agreements, negatively affecting our results of operations and cash flows.

If we are unable to align fixed and variable components between customer pricing contracts and supplier purchasing agreements, we use cash-settled commodity price swaps and options to hedge the market risk associated with the purchase of certain of our raw materials and energy requirements. We routinely use these derivative instruments to hedge a portion of our natural gas, iron ore, zinc and electricity requirements. Our hedging strategy is designed to protect us from excessive pricing volatility. However, since we do not typically hedge 100% of our exposure, abnormal price increases in any of these commodity markets might still negatively affect operating costs.

For derivatives designated in cash flow hedging relationships, we record the effective portion of the gains and losses from the use of these instruments in accumulated other comprehensive income (loss) on the consolidated balance sheets and subsequently recognize the accumulated gains and losses into cost of goods sold in the same period when the associated underlying transactions occur. At December 31, 2016,2017, accumulated other comprehensive income (loss) included $32.5$9.5 in unrealized pre-tax gains for these derivative instruments. All other commodity price swaps and options are marked-to-market and recognized into cost of products sold with the offset recognized as an asset or accrued liability. See Note 17 of the consolidated financial statements for further information on our outstanding derivatives.

The following table presents the negative effect on pre-tax income of a hypothetical change in the fair value of derivative instruments outstanding at December 31, 2016,2017, due to an assumed 10% and 25% decrease in the market price of each of the indicated commodities:
  Negative Effect on Pre-tax Income
Commodity Derivative 10% Decrease 25% Decrease
Natural gas $14.0
 $35.1
Zinc 6.8
 17.1
Electricity 5.1
 12.7
Iron ore 16.8
 36.3

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  Negative Effect on Pre-tax Income
Commodity Derivative 10% Decrease 25% Decrease
Natural gas $10.7
 $26.9
Nickel 0.3
 0.7
Zinc 6.9
 15.9
Electricity 5.3
 13.2
Iron ore 14.7
 32.3

Because we structure and use these instruments as hedges, the benefit of lower prices paid for the physical commodity used in the normal production cycle or higher prices received on the sale of product would offset these hypothetical losses. We do not enter into swap or option contracts for trading purposes.

Foreign Currency Exchange Rate Risk

A portion ofExchange rate fluctuations affect our intercompany receivablesrevenues that are denominated in foreign currencieseuros and our operating costs that are exposed to risks from exchange rate fluctuations. Wedenominated in Canadian dollars, and we use forward currency contracts to manage exposuresreduce our exposure to certain of these currency price fluctuations. At December 31, 20162017 and 2015,2016, we had outstanding forward currency contracts with a total contract value of $5.3$31.2 and $60.3$5.3 for the sale of euros. Based on the contracts outstanding at December 31, 2016,2017, a 10% change in the dollar-to-euro exchange rate would result in a pre-tax impact of $0.5$3.1 on the value of these contracts on a mark-to-market basis, which would offset the effect of a change in the exchange rate on the underlying receivable. At December 31, 2017, we had outstanding forward currency contracts with a total contract value of $117.8 for the purchase of Canadian dollars. Based on the contracts outstanding at December 31, 2017, a 10% change in the U.S. dollar-to-Canadian dollar exchange rate would result in a pre-tax impact of $11.8 on the value of these contracts on a mark-to-market basis, which would offset the effect of a change in the exchange rate on the underlying operating costs. See Note 17 of the consolidated financial statements for further information on our outstanding forward contracts.

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Item 8.Financial Statements and Supplementary Data.

AK Steel Holding Corporation and Subsidiaries
Index to Consolidated Financial Statements
 Page
Consolidated Statements of Operations for the Years Ended December 31, 2017, 2016 2015 and 20142015
Consolidated Statements of Comprehensive Income (Loss) for the Years Ended December 31, 2017, 2016 2015 and 20142015
Consolidated Balance Sheets as of December 31, 20162017 and 20152016
Consolidated Statements of Cash Flows for the Years Ended December 31, 2017, 2016 2015 and 20142015
Consolidated Statements of Stockholders’ Equity (Deficit) for the Years Ended December 31, 2017, 2016 2015 and 20142015
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MANAGEMENT’S RESPONSIBILITY FOR CONSOLIDATED FINANCIAL STATEMENTS

We prepare our consolidated financial statements in conformity with accounting principles generally accepted in the United States of America. These principles permit choices among alternatives and require numerous estimates of financial matters. We believe the accounting principles chosen are appropriate under the circumstances, and that the estimates, judgments and assumptions involved in our financial reporting are reasonable.

We are responsible for the integrity and objectivity of the financial information presented in our consolidated financial statements. We maintain a system of internal accounting controls designed to provide reasonable assurance that employees comply with stated policies and procedures, that assets are safeguarded and that financial reports are fairly presented. On a regular basis, financial management discusses internal accounting controls and financial reporting matters with our independent registered public accounting firm and our Audit Committee, composed solely of independent outside directors. The independent registered public accounting firm and the Audit Committee also meet privately to discuss and assess our accounting controls and financial reporting.

Dated:February 17, 201715, 2018 /s/ Roger K. Newport
   Roger K. Newport
   Chief Executive Officer and Director
    
    
Dated:February 17, 201715, 2018 /s/ Jaime Vasquez
   Jaime Vasquez
   Vice President, Finance and Chief Financial Officer

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Stockholders of
AK Steel Holding Corporation

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of AK Steel Holding Corporation (the “Company”)Company) as of December 31, 20162017 and 2015,2016, and the related consolidated statements of operations, comprehensive income (loss), stockholders’ equity (deficit), and cash flows for each of the three years in the period ended December 31, 2016. These2017, and the related notes (collectively referred to as the “consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States)statements”). 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 consolidated financial statements referred to above present fairly, in all material respects, the consolidated financial position of AK Steel Holding Corporationthe Company at December 31, 2017 and 2016, and 2015, and the consolidated results of its operations and its cash flows for each of the three years in the period ended December 31, 2016,2017, in conformity with U. S.U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), AK Steel Holding Corporation’sthe Company’s internal control over financial reporting as of December 31, 2016,2017, 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 February 17, 201715, 2018 expressed an unqualified opinion thereon.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures include examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ ERNST & YOUNG LLP

We have served as the Company’s auditor since 2013.
Cincinnati, Ohio
February 17, 201715, 2018

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AK STEEL HOLDING CORPORATIONCONSOLIDATED STATEMENTS OF OPERATIONS
Years Ended December 31, 2016, 2015 and 2014
Years Ended December 31, 2017, 2016 and 2015Years Ended December 31, 2017, 2016 and 2015
(dollars in millions, except per share data)
 2016 2015 2014 2017 2016 2015
            
Net sales $5,882.5
 $6,692.9
 $6,505.7
 $6,080.5
 $5,882.5
 $6,692.9
            
Cost of products sold (exclusive of items shown separately below) 5,064.7
 6,032.0
 6,007.7
 5,359.7
 5,064.7
 6,032.0
Selling and administrative expenses (exclusive of items shown separately below) 277.2
 261.9
 247.2
 282.9
 277.2
 261.9
Depreciation 216.6
 216.0
 201.9
 226.0
 216.6
 216.0
Pension and OPEB expense (income) (exclusive of corridor and settlement charges shown below) (43.8) (63.0) (92.5) (64.4) (43.8) (63.0)
Pension and OPEB net corridor charge 43.1
 131.2
 2.0
 
 43.1
 131.2
Pension settlement charges 25.0
 
 
 
 25.0
 
Charges for termination of pellet agreement and related transportation costs 69.5
 
 
Charge (credit) for termination of pellet agreement and related transportation costs (19.3) 69.5
 
Asset impairment charge 75.6
 
 
Charge for facility idling 
 28.1
 
 
 
 28.1
Total operating costs 5,652.3
 6,606.2
 6,366.3
 5,860.5
 5,652.3
 6,606.2
Operating profit 230.2
 86.7
 139.4
 220.0
 230.2
 86.7
Interest expense 163.9
 173.0
 144.7
 152.3
 163.9
 173.0
Impairment of Magnetation investment 
 (256.3) 
 
 
 (256.3)
Impairment of AFSG investment 
 (41.6) 
 
 
 (41.6)
Other income (expense) (4.9) 1.4
 (21.1) (17.1) (4.9) 1.4
Income (loss) before income taxes 61.4
 (382.8) (26.4) 50.6
 61.4
 (382.8)
Income tax expense 3.2
 63.4
 7.7
Income tax expense (benefit) (17.0) 3.2
 63.4
Net income (loss) 58.2
 (446.2) (34.1) 67.6
 58.2
 (446.2)
Less: Net income attributable to noncontrolling interests 66.0
 62.8
 62.8
 61.4
 66.0
 62.8
Net income (loss) attributable to AK Steel Holding Corporation $(7.8) $(509.0) $(96.9) $6.2
 $(7.8) $(509.0)
Basic and diluted earnings per share:            
Net income (loss) attributable to AK Steel Holding Corporation common stockholders $(0.03) $(2.86) $(0.65) $0.02
 $(0.03) $(2.86)

See notes to consolidated financial statements.
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AK STEEL HOLDING CORPORATIONCONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Years Ended December 31, 2016, 2015 and 2014
Years Ended December 31, 2017, 2016 and 2015Years Ended December 31, 2017, 2016 and 2015
(dollars in millions)
 2016 2015 2014 2017 2016 2015
Net income (loss) $58.2
 $(446.2) $(34.1) $67.6
 $58.2
 $(446.2)
Other comprehensive income (loss), before tax:      
Other comprehensive income, before tax:      
Foreign currency translation gain (loss) (1.5) (3.1) (3.7) 4.7
 (1.5) (3.1)
Cash flow hedges:            
Gains (losses) arising in period 56.1
 (64.2) (51.6) (11.5) 56.1
 (64.2)
Reclassification of losses (gains) to net income (loss) 27.2
 61.4
 1.1
 (12.5) 27.2
 61.4
Pension and OPEB plans:            
Prior service credit (cost) arising in period (8.3) (7.7) 10.9
 4.7
 (8.3) (7.7)
Gains (losses) arising in period 11.6
 (60.8) (422.5) 94.2
 11.6
 (60.8)
Reclassification of prior service cost (credits) included in net income (loss) (54.8) (60.2) (68.9) (53.8) (54.8) (60.2)
Reclassification of losses (gains) included in net income (loss) 97.9
 165.0
 6.9
 6.3
 97.9
 165.0
Other comprehensive income (loss), before tax 128.2
 30.4
 (527.8)
Income tax expense in other comprehensive income (loss) 4.5
 13.2
 
Other comprehensive income (loss) 123.7
 17.2
 (527.8)
Other comprehensive income, before tax 32.1
 128.2
 30.4
Income tax expense in other comprehensive income 8.6
 4.5
 13.2
Other comprehensive income 23.5
 123.7
 17.2
Comprehensive income (loss) 181.9
 (429.0) (561.9) 91.1
 181.9
 (429.0)
Less: Comprehensive income attributable to noncontrolling interests 66.0
 62.8
 62.8
 61.4
 66.0
 62.8
Comprehensive income (loss) attributable to AK Steel Holding Corporation $115.9
 $(491.8) $(624.7) $29.7
 $115.9
 $(491.8)

See notes to consolidated financial statements.
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AK STEEL HOLDING CORPORATIONCONSOLIDATED BALANCE SHEETS
December 31, 2016 and 2015
December 31, 2017 and 2016December 31, 2017 and 2016
(dollars in millions, except per share data)
 2016 2015 2017 2016
ASSETS        
Current assets:        
Cash and cash equivalents $173.2
 $56.6
 $38.0
 $173.2
Accounts receivable, net 442.0
 444.9
 517.8
 442.0
Inventory, net 1,113.9
 1,226.3
 1,147.8
 1,113.9
Other current assets 94.6
 78.4
 130.3
 94.6
Total current assets 1,823.7
 1,806.2
 1,833.9
 1,823.7
Property, plant and equipment 6,569.0
 6,466.0
 6,831.8
 6,569.0
Accumulated depreciation (4,554.6) (4,379.5) (4,845.6) (4,554.6)
Property, plant and equipment, net 2,014.4
 2,086.5
 1,986.2
 2,014.4
Other non-current assets:        
Goodwill and intangible assets 306.7
 32.8
Other non-current assets 197.9
 191.7
 169.3
 165.1
TOTAL ASSETS $4,036.0
 $4,084.4
 $4,296.1
 $4,036.0
LIABILITIES AND EQUITY (DEFICIT)    
LIABILITIES AND EQUITY    
Current liabilities:
        
Accounts payable $589.9
 $703.4
 $690.4
 $589.9
Accrued liabilities 234.1
 261.5
 270.5
 234.1
Current portion of pension and other postretirement benefit obligations 41.3
 77.7
 40.1
 41.3
Total current liabilities 865.3
 1,042.6
 1,001.0
 865.3
Non-current liabilities:        
Long-term debt 1,816.6
 2,354.1
 2,110.1
 1,816.6
Pension and other postretirement benefit obligations 1,093.7
 1,146.9
 894.2
 1,093.7
Other non-current liabilities 148.4
 136.4
 161.6
 148.4
TOTAL LIABILITIES 3,924.0
 4,680.0
 4,166.9
 3,924.0
EXCHANGEABLE NOTES EXCHANGE FEATURE 21.3
 
 
 21.3
Equity (deficit):        
Common stock, authorized 450,000,000 shares of $.01 par value each; issued 314,739,500 and 178,284,137 shares in 2016 and 2015; outstanding 314,160,557 and 177,893,562 shares in 2016 and 2015 3.1
 1.8
Common stock, authorized 450,000,000 shares of $.01 par value each; issued 315,782,764 and 314,739,500 shares in 2017 and 2016; outstanding 314,884,569 and 314,160,557 shares in 2017 and 2016 3.2
 3.1
Additional paid-in capital 2,855.4
 2,266.8
 2,884.8
 2,855.4
Treasury stock, common shares at cost, 578,943 and 390,575 shares in 2016 and 2015 (2.4) (2.0)
Treasury stock, common shares at cost, 898,195 and 578,943 shares in 2017 and 2016 (5.4) (2.4)
Accumulated deficit (3,064.8) (3,057.0) (3,058.6) (3,064.8)
Accumulated other comprehensive loss (63.5) (187.2) (40.0) (63.5)
Total stockholders’ equity (deficit) (272.2) (977.6) (216.0) (272.2)
Noncontrolling interests 362.9
 382.0
 345.2
 362.9
TOTAL EQUITY (DEFICIT) 90.7
 (595.6)
TOTAL LIABILITIES AND EQUITY (DEFICIT) $4,036.0
 $4,084.4
TOTAL EQUITY 129.2
 90.7
TOTAL LIABILITIES AND EQUITY $4,296.1
 $4,036.0


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The consolidated balance sheets as of December 31, 20162017 and 20152016, include the following amounts for consolidated variable interest entities, before intercompany eliminations. See Note 15 for more information concerning variable interest entities.
 2016 2015 2017 2016
Middletown Coke Company, LLC (“SunCoke Middletown”)        
Cash and cash equivalents $5.0
 $7.6
 $0.1
 $5.0
Inventory, net 16.2
 19.8
 18.4
 16.2
Property, plant and equipment 422.3
 421.5
 425.9
 422.3
Accumulated depreciation (72.5) (57.6) (88.6) (72.5)
Accounts payable 7.8
 10.8
 11.3
 7.8
Other assets (liabilities), net (2.3) (0.5) (1.0) (2.3)
Noncontrolling interests 360.9
 380.0
 343.5
 360.9
        
Other variable interest entities        
Cash and cash equivalents $0.8
 $1.1
 $0.7
 $0.8
Property, plant and equipment 11.8
 11.5
 11.7
 11.8
Accumulated depreciation (9.5) (9.4) (9.6) (9.5)
Other assets (liabilities), net 1.0
 0.9
 0.8
 1.0
Noncontrolling interests 2.0
 2.0
 1.7
 2.0

See notes to consolidated financial statements.
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AK STEEL HOLDING CORPORATIONCONSOLIDATED STATEMENTS OF CASH FLOWS
Years Ended December 31, 2016, 2015 and 2014
Years Ended December 31, 2017, 2016 and 2015Years Ended December 31, 2017, 2016 and 2015
(dollars in millions)
 2016 2015 2014 2017 2016 2015
Cash flows from operating activities:            
Net income (loss) $58.2
 $(446.2) $(34.1) $67.6
 $58.2
 $(446.2)
Adjustments to reconcile net income (loss) to cash flows from operating activities:            
Depreciation 201.7
 201.7
 187.6
 209.8
 201.7
 201.7
Depreciation—SunCoke Middletown 14.9
 14.3
 14.3
 16.2
 14.9
 14.3
Amortization 18.4
 21.2
 20.4
 24.1
 18.4
 21.2
Asset impairment charge—Ashland Works Hot End 75.6
 
 
Impairment of Magnetation and AFSG investments 
 297.9
 
 
 
 297.9
Charge for transportation costs affected by termination of pellet agreement 32.9
 
 
Charge (credit) for transportation costs affected by termination of pellet agreement (19.3) 32.9
 
Deferred income taxes 5.0
 62.1
 8.2
 (15.2) 5.0
 62.1
Contributions to pension trust 
 (24.1) (196.5) (44.1) 
 (24.1)
Pension and OPEB expense (income) (43.8) (63.0) (92.5) (64.4) (43.8) (63.0)
Pension and OPEB net corridor charge 43.1
 131.2
 2.0
 
 43.1
 131.2
Pension settlement charges 25.0
 
 
 
 25.0
 
Contributions to retirees VEBA 
 (3.1) (3.1)
Affiliate (earnings) losses and distributions, net (6.0) 19.7
 9.8
 (3.5) (6.0) 19.7
(Gains) losses on retirement of debt 21.3
 9.2
 (9.8)
Mark-to-market (gains) losses on derivative contracts (45.7) 1.2
 13.3
Other operating items, net 18.5
 (4.4) 6.0
 8.6
 8.1
 (11.0)
Changes in assets and liabilities, net of effect of acquired business:            
Accounts receivable 0.1
 228.1
 33.8
 (34.4) 0.1
 228.1
Inventories 112.4
 (53.8) (223.4) 1.8
 112.4
 (53.8)
Accounts payable and other current liabilities (143.2) (139.7) 25.2
 46.2
 (143.2) (139.7)
Charge for facility idling 
 28.1
 
 
 
 28.1
Other assets 40.9
 (7.6) (8.2) (6.5) 40.9
 (7.6)
Pension obligations (33.0) (12.7) (18.2)
Postretirement benefit obligations (34.4) (48.3) (63.9)
Other pension payments (1.1) (33.0) (12.7)
OPEB payments (39.6) (34.4) (48.3)
Other liabilities (6.1) (1.1) 9.8
 1.4
 (6.1) (1.1)
Net cash flows from operating activities 304.6
 200.3
 (322.8) 198.8
 304.6
 200.3
Cash flows from investing activities:
            
Capital investments (127.6) (99.0) (81.1) (152.5) (127.6) (99.0)
Investments in Magnetation LLC 
 
 (100.0)
Investments in acquired business, net of cash acquired 
 
 (690.3)
Investment in acquired business, net of cash acquired (360.4) 
 
Proceeds from sale of equity investee 
 25.0
 
 
 
 25.0
Proceeds from AFSG Holdings, Inc. distribution 
 14.0
 
 
 
 14.0
Other investing items, net 2.3
 12.5
 13.6
 4.2
 2.3
 12.5
Net cash flows from investing activities (125.3) (47.5) (857.8) (508.7) (125.3) (47.5)
Cash flows from financing activities:            
Net borrowings (repayments) under credit facility (550.0) (55.0) 515.0
 450.0
 (550.0) (55.0)
Proceeds from issuance of long-term debt 380.0
 
 427.1
 680.0
 380.0
 
Redemption of long-term debt (392.8) (14.1) (0.8) (848.4) (392.8) (14.1)
Proceeds from issuance of common stock 600.4
 
 345.3
 
 600.4
 
Debt issuance costs (20.4) 
 (15.5) (25.3) (20.4) 
SunCoke Middletown distributions to noncontrolling interest owners (85.1) (96.3) (61.0) (79.1) (85.1) (96.3)
Other financing items, net 5.2
 (1.0) (4.6) (2.5) 5.2
 (1.0)
Net cash flows from financing activities (62.7) (166.4) 1,205.5
 174.7
 (62.7) (166.4)
Net increase (decrease) in cash and cash equivalents 116.6
 (13.6) 24.9
 (135.2) 116.6
 (13.6)
Cash and cash equivalents, beginning of year 56.6
 70.2
 45.3
 173.2
 56.6
 70.2
Cash and cash equivalents, end of year $173.2
 $56.6
 $70.2
 $38.0
 $173.2
 $56.6

See notes to consolidated financial statements.
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AK STEEL HOLDING CORPORATIONCONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (DEFICIT)
Years Ended December 31, 2016, 2015 and 2014
Years Ended December 31, 2017, 2016 and 2015Years Ended December 31, 2017, 2016 and 2015
(dollars in millions)
Common
Stock
 
Addi-
tional
Paid-In-
Capital
 
Treasury
Stock
 
Accum-
ulated
Deficit
 
Accum-
ulated
Other
Compre-
hensive
Loss
 
Noncon-
trolling
Interests
 Total
Common
Stock
 
Addi-
tional
Paid-In-
Capital
 
Treasury
Stock
 
Accum-
ulated
Deficit
 
Accum-
ulated
Other
Compre-
hensive
Loss
 
Noncon-
trolling
Interests
 Total
December 31, 2013$1.5
 $2,079.2
 $(174.0) $(2,451.1) $323.4
 $413.7
 $192.7
Net income (loss) 
  
  
 (96.9)  
 62.8
 (34.1)
Issuance of common stock0.4
 344.9
         345.3
Retirement of treasury stock(0.1) (173.9) 174.0
       
Share-based compensation 
 8.9
  
  
  
  
 8.9
Purchase of treasury stock 
  
 (1.0)  
  
  
 (1.0)
Change in accumulated other comprehensive loss 
  
  
  
 (527.8)  
 (527.8)
Net distributions to noncontrolling interests          (61.0) (61.0)
December 31, 2014$1.8
 $2,259.1
 $(1.0) $(2,548.0) $(204.4) $415.5
 $(77.0)$1.8
 $2,259.1
 $(1.0) $(2,548.0) $(204.4) $415.5
 $(77.0)
             
Net income (loss) 
  
  
 (509.0)  
 62.8
 (446.2) 
  
  
 (509.0)  
 62.8
 (446.2)
Share-based compensation 
 7.7
  
  
  
  
 7.7
 
 7.7
  
  
  
  
 7.7
Purchase of treasury stock 
  
 (1.0)  
  
  
 (1.0) 
  
 (1.0)  
  
  
 (1.0)
Change in accumulated other comprehensive loss 
  
  
  
 17.2
  
 17.2
 
  
  
  
 17.2
  
 17.2
Net distributions to noncontrolling interests          (96.3) (96.3)          (96.3) (96.3)
December 31, 2015$1.8
 $2,266.8
 $(2.0) $(3,057.0) $(187.2) $382.0
 $(595.6)$1.8
 $2,266.8
 $(2.0) $(3,057.0) $(187.2) $382.0
 $(595.6)
                          
Net income (loss) 
  
  
 (7.8)  
 66.0
 58.2
 
  
  
 (7.8)  
 66.0
 58.2
Issuance of common stock1.3
 599.1
         600.4
1.3
 599.1
         600.4
Share-based compensation 
 5.4
  
  
  
  
 5.4
 
 5.4
  
  
  
  
 5.4
Stock options exercised 
 5.4
  
  
  
  
 5.4
  5.4
         5.4
Exchangeable notes exchange feature  (21.3)         (21.3)  (21.3)         (21.3)
Purchase of treasury stock 
  
 (0.4)  
  
  
 (0.4) 
  
 (0.4)  
  
  
 (0.4)
Change in accumulated other comprehensive loss 
  
  
  
 123.7
  
 123.7
 
  
  
  
 123.7
  
 123.7
Net distributions to noncontrolling interests          (85.1) (85.1)          (85.1) (85.1)
December 31, 2016$3.1
 $2,855.4
 $(2.4) $(3,064.8) $(63.5) $362.9
 $90.7
$3.1
 $2,855.4
 $(2.4) $(3,064.8) $(63.5) $362.9
 $90.7
             
Net income (loss) 
  
  
 6.2
  
 61.4
 67.6
Share-based compensation0.1
 7.6
  
  
  
  
 7.7
Stock options exercised 
 0.5
  
  
  
  
 0.5
Exchangeable notes exchange feature  21.3
         21.3
Purchase of treasury stock 
  
 (3.0)  
  
  
 (3.0)
Change in accumulated other comprehensive loss 
  
  
  
 23.5
  
 23.5
Net distributions to noncontrolling interests          (79.1) (79.1)
December 31, 2017$3.2
 $2,884.8
 $(5.4) $(3,058.6) $(40.0) $345.2
 $129.2

See notes to consolidated financial statements.

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AK STEEL HOLDING CORPORATION
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(dollars in millions, except per share amounts or as otherwise specifically noted)

NOTE 1 - Summary of Significant Accounting Policies
 

Basis of Presentation: These financial statements consolidate the operations and accounts of AK Steel Holding Corporation (“AK Holding”), its wholly-owned subsidiary AK Steel Corporation (“AK Steel”), all subsidiaries in which AK Holding has a controlling interest, and two variable interest entities for which AK Steel is the primary beneficiary. Unless the context indicates otherwise, references to “we,” “us” and “our” refer to AK Holding and its subsidiaries. We also operate Mexican and European trading companies that buy and sell steel and steel products and other materials. We manage operations on a consolidated, integrated basis so that we can use the most appropriate equipment and facilities for the production of a product, regardless of product line. Therefore, we conclude that we operate in a single business segment. All intercompany transactions and balances have been eliminated.

Use of Estimates: The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires the use of estimates and assumptions that affect the amounts reported. We base these estimates on historical experience and information available to us about current events and actions we may take in the future. Estimates and assumptions affect significant items that include the carrying value of long-lived assets, including investments and goodwill; valuation allowances for receivables, inventories and deferred income tax assets; legal and environmental liabilities; workers compensation and asbestos liabilities; share-based compensation; and assets and obligations of employee benefit plans. There can be no assurance that actual results will not differ from these estimates.

Revenue Recognition: Revenue from sales of products is recognized at the time that title and the risks and rewards of ownership pass, which can be on the date of shipment or the date of receipt by the customer depending on when the terms of customers’ arrangements are met, the sales price is fixed or determinable, and collection is reasonably assured. Sales taxes collected from customers are recorded on a net basis with no revenue recognized.

Cost of Products Sold: Cost of products sold consists primarily of raw materials, energy costs, supplies consumed in the manufacturing process, manufacturing labor, contract labor and direct overhead expense necessary to manufacture the finished steel product, as well as distribution and warehousing costs. Our share of the income (loss) of investments in associated companies accounted for under the equity method is included in costs of products sold since these operations are integrated with our overall steelmaking operations, except for our share of the income (loss)loss of Magnetation LLC (“Magnetation”), which was included in other income (expense) in 2015 and 2014.2015.

Share-Based Compensation: Compensation costs for stock awards granted under our Stock Incentive Plan are recognized over their vesting period using the straight-line method. We estimate stock award forfeitures expected to occur to determine the compensation cost we recognize each period.

Legal Fees: Legal fees associated with litigation and similar proceedings that are not expected to provide a benefit in future periods are expensed as incurred. Legal fees associated with activities that are expected to provide a benefit in future periods, such as costs associated with the issuance of debt, are capitalized as incurred.

Income Taxes: Interest and penalties from uncertain tax positions are included in income tax expense. Deferred tax assets do not include certain amounts that arise from tax deductions from share-based compensation in excess of compensation recognized for financial reporting when net operating loss carryforwards are created. We use tax law ordering to determine when excess tax benefits have been realized.

Earnings per Share: Earnings per share is calculated using the “two-class” method. Under the “two-class” method, undistributed earnings are allocated to both common shares and participating securities. We divide the sum of distributed earnings to common stockholders and undistributed earnings allocated to common stockholders by the weighted-average number of common shares outstanding during the period. The restricted stock granted by AK Holding is entitled to non-forfeitable dividends before vesting and meets the criteria of a participating security.

Cash Equivalents: Cash equivalents include short-term, highly liquid investments that are readily convertible to known amounts of cash and have an original maturity of three months or less.

Inventories: Inventories are valued at the lower of cost or market. We measure the cost of the majority of inventories on the last-in, first-out (“LIFO”) accounting method. Other inventories are measured principally at average cost and consist mostly of stamping inventories, foreign inventories, certain raw materials and spare parts and supplies.

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Property, Plant and Equipment: Plant and equipment are depreciated under the straight-line method over their estimated lives. Estimated lives are as follows: land improvements over 20 years, leaseholds over the life of the related operating lease term,
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buildings over 40 years and machinery and equipment over two to 20 years. The estimated weighted-average life of our machinery and equipment is 1214 years at the end of the current year. Amortization expense for assets recorded under capital leases is included in depreciation expense. Costs incurred to develop coal mines are capitalized when incurred. We use the units-of-production method utilizing only proven and probable reserves in the depletion base to compute the depletion of coal reserves and mine development costs. We expense costs for major maintenance activities at our operating facilities when the activities occur.

We review the carrying value of long-lived assets to be held and used and long-lived assets to be disposed of when events and circumstances warrant such a review. If the carrying value of a long-lived asset exceeds its fair value, an impairment has occurred and a loss is recognized based on the amount by which the carrying value exceeds the fair value, less cost to dispose, for assets to be sold or abandoned. We determine fair value by using quoted market prices, estimates based on prices of similar assets or anticipated cash flows discounted at a rate commensurate with risk.

Investments: Investments in associated companies are accounted for under the equity method. We review investments for impairment when circumstances indicate that a loss in value below its carrying amount is other than temporary.

Goodwill:Goodwill and Intangible Assets: Goodwill relates to our tubular business.and Precision Partners’ businesses. Intangible assets are recorded at cost, and those with finite lives are amortized over their estimated useful lives. We review goodwill for potential impairment at least annually on October 1 each year and whenever events or circumstances make it more likely than not that impairment may have occurred. Considering operating results and the estimated fair value of the business,businesses, the most recent annual goodwill impairment testtests indicated that the fair value of each of our tubular business reporting unitunits was in excess of its carrying value. No goodwill impairment was recorded as a result of the annual impairment tests in the past three years.

Debt Issuance Costs: Debt issuance costs for the revolving credit facility are included in other non-current assets and all other debt issuance costs reduce the carrying amount of long-term debt.

Pension and Other Postretirement Benefits: We recognize, as of a measurement date, any unrecognized actuarial net gains or losses that exceed 10% of the larger of the projected benefit obligations or the plan assets, defined as the “corridor”. Amounts inside the corridor are amortized over the plan participants’ life expectancy. We determine the expected return on assets using the fair value of plan assets.

Concentrations of Credit Risk: We are primarily a producer of carbon, stainless and electrical steels and steel products, which are sold to a number of markets, including automotive, industrial machineryinfrastructure and equipment, power distributionmanufacturing, and appliances.distributors and converters. Net sales by product line are presented below:
 2016 2015 2014
Carbon$4,014.5
 $4,746.8
 $4,423.3
Stainless and electrical1,654.1
 1,733.0
 1,836.5
Tubular193.7
 201.3
 231.4
Other20.2
 11.8
 14.5
Total$5,882.5
 $6,692.9
 $6,505.7
 2017 2016 2015
Carbon steel$4,034.5
 $4,014.5
 $4,746.8
Stainless and electrical steel1,687.6
 1,654.1
 1,733.0
Tubular, components and other358.4
 213.9
 213.1
Total$6,080.5
 $5,882.5
 $6,692.9

Percentages of our net sales to various markets are presented below:
2016 2015 20142017 2016 2015
Automotive66% 60% 53%65% 66% 60%
Infrastructure and Manufacturing16% 16% 18%16% 16% 16%
Distributors and Converters18% 24% 29%19% 18% 24%


We sell domestically to customers located primarily in the Midwestern and Eastern United States and to foreign customers, primarily in Canada, Mexico and Western Europe. Net sales to customers located outside the United States totaled $627.1, $655.6 and $855.7 for 2017, 2016 and $755.42015. We had one customer that accounted for 2016, 201512% of net sales in 2017 and 2014. Wewe had two customers that accounted for 12% and 11% of net sales in 2016 and 12% and 11% in 2015. No customer accounted for more than 10% of our net sales during 2014.

Approximately 57%55% and 65%57% of accounts receivable outstanding at December 31, 20162017 and 2015,2016, are due from businesses associated with the U.S. automotive industry, including 16% and 12%18% of receivables due from two automotive customers as of December 31, 2016 and 20% from one automotive customer as of December 31, 2015.2017 and 16% due from one automotive customer as of December 31, 2016. Except in a few situations where the risk warrants it, we do not require collateral on accounts receivable. While we believe our recorded accounts receivable will be collected, in the event of
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default we follow normal collection procedures.procedures if customers default. We maintain an allowance for doubtful accounts for the loss that would be incurred if a customer is unable to pay amounts due. We determine this allowance based on various factors, including the customer’s financial condition and
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changes in customer payment patterns. We write off accounts receivable against the allowance for doubtful accounts when it is remote that collection will occur.

Union Contracts: At December 31, 2016,2017, we employed approximately 8,5009,200 people, of which approximately 6,1005,700 are represented by labor unions under various contracts that expire between 20172018 and 20192021. In the first quarter of 2017, members of the United Steel Workers, Local 169, ratified a labor agreement covering approximately 305 hourly employees at Mansfield Works. The new agreement expires March 31, 2021. In the third quarter of 2016,2017, members of the United Auto Workers, Local 3303,3044, ratified a labor agreement covering approximately 1,200330 hourly employees at Butlerour Rockport Works. The new agreement expires September 30, 2021. In the fourth quarter of 2017, members of the United Steel Workers, Local 1915, ratified a labor agreement covering approximately 90 hourly employees at the Walbridge, Ohio facility with our wholly-owned subsidiary AK Tube LLC. The new agreement is scheduled to expireeffective January 22, 2018 and expires January 22, 2021. In the fourth quarter of 2017, members of the United Auto Workers, Local 600, ratified a labor agreement covering approximately 1,170 hourly employees at our Dearborn Works. The new agreement expires July 31, 2021. An agreement with the International Association of Machinists and Aerospace Workers, Local 1943, which represents approximately 1,725 hourly employees at our Middletown Works, expires on April 1, 2019.March 15, 2018. An agreement with the United Steel Workers, Local 169,1865, which represents approximately 310305 hourly employees at our MansfieldAshland Works, located in Mansfield, Ohio, is scheduled to expire on March 31, 2017. An agreement with the United Auto Workers, Local 600, which represents approximately 1,160 hourly employees at our Dearborn Works located in Dearborn, Michigan, is also scheduled to expire on March 31, 2017. An agreement with the United Auto Workers, Local 3044, which represents approximately 190 production employees at our Rockport Works located in Rockport, Indiana, is scheduled to expireexpires on September 30, 2017. As of January 1, 2016, approximately 140 hourly Rockport Works maintenance employees transferred to our employment from an independent contractor. We have been negotiating with the United Auto Workers for the contractual terms for these employees to be added to the union.2018.

Financial Instruments: We are a party to derivative instruments that are designated and qualify as hedges for accounting purposes. We may also use derivative instruments to which we do not apply hedge accounting treatment. Our objective in using these instruments is to limit operating cash flow exposure to fluctuations in the fair value of selected commodities and currencies.

Fluctuations in the price of certain commodities we use in production processes may affect our income and cash flows. We have implemented raw material and energy surcharges for some contract customers. For certain commodities where such exposure exists, we may use cash-settled commodity price swaps, collars and purchase options, with a duration of up to three years, to hedge the price of a portion of our natural gas, iron ore, electricity, aluminum, zinc and nickel requirements. We may designate some of these instruments as cash flow hedges and the effective portion of the changes in their fair value and settlements are recorded in accumulated other comprehensive income. We subsequently reclassify gains and losses from accumulated other comprehensive income to cost of products sold in the same period we recognize the earnings associated with the underlying transaction. Other instruments are marked to market and recorded in cost of products sold with the offset recorded as assets or liabilities.

In addition, exchangeExchange rate fluctuations on moniesaffect a portion of revenues and operating costs that are denominated in foreign currencies, and we receive from European subsidiariesuse forward currency and other customers invoiced in European currencies create cash flow and income statement risks. Tocurrency option contracts to reduce our exposure to certain of these risks, we have entered a series of agreements to sell euros in the future at fixed dollar rates.currency price fluctuations. These forwardderivative contracts are entered with durations up to twenty-fourthirty-six months. A typical contract is used as a cash flow hedge for the periodContracts that begins when we take an order and ends when we recognize a sale, at which time it converts into a fair value hedge of a receivable we collect in euros. We dosell euros have not designate these derivativesbeen designated as hedges for accounting purposes and we recognize the changegains or losses are reported in fair value as expense or incomeearnings immediately in other income (expense). Contracts that purchase Canadian dollars are designated as hedges for accounting purposes, which requires us to record the effective gains and losses for the derivatives in accumulated other comprehensive income (loss) and reclassify them into cost of products sold in the same period we recognize costs for the associated underlying operations. We recognize gains and losses on these designated derivatives immediately in cost of products sold if we calculate hedge ineffectiveness.

We formally document all relationships between hedging instruments and hedged items, as well as risk management objectives and strategies for undertaking various hedge transactions. In this documentation, we specifically identify the asset, liability, firm commitment or forecasted transaction that has been designated as a hedged item, and state how the hedging instrument is expected to hedge the risks from that item. We formally measure effectiveness of hedging relationships both at the hedge inception and on an ongoing basis. We discontinue hedge accounting prospectively when we determine that the derivative is no longer effective in offsetting changes in the fair value or cash flows of a hedged item; when the derivative expires or is sold, terminated or exercised; when it is probable that the forecasted transaction will not occur; when a hedged firm commitment no longer meets the definition of a firm commitment; or when we determine that designation of the derivative as a hedge instrument is no longer appropriate. Our derivative contracts may contain collateral funding requirements. We have master netting arrangements with counterparties, giving us the right to offset amounts owed under the derivative instruments and the collateral. We do not offset derivative assets and liabilities or collateral on our consolidated balance sheets.

Asbestos and Environmental Accruals: For a number of years, we have been remediating sites where hazardous materials may have been released, including sites no longer owned by us. In addition, a number of lawsuits alleging asbestos exposure have been filed and continue to be filed against us. We have established accruals for estimated probable costs from asbestos claim settlements and environmental investigation, monitoring and remediation. If the accruals are not adequate to meet future claims, operating results and cash flows may be negatively affected. Our accruals do not consider the potential for insurance recoveries, for which we have partial insurance coverage for some future asbestos claims. In addition, some existing insurance policies covering asbestos and environmental contingencies may serve to partially reduce future covered expenditures.

New Accounting Pronouncements: The Financial Accounting Standards Board (FASB) issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606), during the second quarter of 2014. Topic 606, as further amended by subsequent Accounting Standard Updates, affects virtually all aspects of an entity’s revenue recognition, including determining the
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measurement of revenue and the timing of when it is recognized for the transfer of goods or services to customers. Topic 606 is effective for us beginning January 1, 2018. The guidance permits two methods of adoption—retrospectively to each prior reporting period presented (full retrospective method), or retrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (modified retrospective method). We currently anticipate adopting the standard using the modified retrospective method as of January 1, 2018. We are evaluating the effect of the adoption of Topic 606 on our financial position and results of operations.

FASB issued Accounting Standards Update No. 2016-02, Leases (Topic 842), during the first quarter of 2016. Topic 842 requires entities to recognize lease assets and lease liabilities and disclose key information about leasing arrangements for certain leases. We will be required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. Topic 842 is effective for us beginning January 1, 2019. We are currently evaluating the effect of the adoption of Topic 842 on our financial position and results of operations.

FASB(“FASB”) issued a standard update during the first quarter of 2016 to simplify several aspects of the accounting for employee share-based payments. The new guidance requires
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companies to record excess tax benefits and tax deficiencies in the income statement when stock awards vest or are settled. In addition, companies will no longer separately classify cash flows related to excess tax benefits as a financing activity apart from other income tax cash flows. The standard also allows companies to repurchase more of each employee’s vesting shares for tax withholding purposes without triggering liability accounting, clarifies that all cash payments made to tax authorities on each employee’s behalf for withheld shares should be presented as a financing activity on companies’ cash flows statements, and provides an accounting policy election to account for forfeitures as they occur. ThisWe adopted this update is effective for us beginning January 1, 2017. We are currently evaluating the effect of theThe adoption of this update on our financial position and results of operations, but expect the adoption to havehad a minimal effect on us. We do not expect that recognizingrecognized previously unrecorded excess tax benefits willoffset with an equal change in valuation allowance. We have a material effect on our results of operations since we expect to record a valuation allowance that offsets deferred tax assets generated from recognizing those benefits. We intend to electelected to continue to estimate forfeitures expected to occur to determine the compensation cost we recognize each period. The presentation requirements for cash flows related to employee taxes paid for withheld shares will havehas no effect on us since we have historically presented these as a financing activity.

FASB issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606), during the second quarter of 2014. Topic 606, as further amended by subsequent Accounting Standard Updates, affects virtually all aspects of an entity’s revenue recognition, including determining the measurement of revenue and the timing of when it is recognized for the transfer of goods or services to customers. Topic 606 is effective for us beginning January 1, 2018. The guidance permits two methods of adoption—retrospectively to each prior reporting period presented (full retrospective method), or retrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (modified retrospective method). Topic 606 does not have a material effect on us as most revenue transactions recorded under Topic 606 will be substantially consistent with treatment under existing guidance. Our revenue transactions generally consist of a single performance obligation to transfer promised goods and are not accounted for under industry-specific guidance. Topic 606 also provides for enhanced disclosure requirements surrounding revenue recognition and we are currently completing our responsive disclosures. We will adopt the standard using the modified retrospective method as of January 1, 2018.

FASB issued Accounting Standards Update No. 2016-02, Leases (Topic 842), during the first quarter of 2016. Topic 842 requires entities to recognize lease assets and lease liabilities and disclose key information about leasing arrangements for certain leases. We will be required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. Topic 842 is effective for us beginning January 1, 2019. We are currently evaluating the effect of the adoption of Topic 842 on our consolidated financial position and results of operations. We expect that the adoption of the standard will result in a material increase to the assets and liabilities on our consolidated balance sheets.

In June 2016, the FASB issued a new standard to replace the incurred loss impairment methodology with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. In connection with recognizing credit losses on receivables and other financial instruments, we will be required to use a forward-looking expected loss model rather than the incurred loss model. The new standard will be effective for us beginning January 1, 2020, with early adoption permitted beginning January 1, 2019. Adoption of this standard is through a cumulative-effect adjustment to retained earnings as of the effective date. We are currently evaluating the effect of this standard on our consolidated financial position and results of operations.

In August 2017, the FASB issued a standard update to better align an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. Among other amendments, the update provided that for a cash flow hedge of a forecasted purchase or sale of a nonfinancial asset, an entity may designate as the hedged risk the variability in cash flows attributable to changes in a contractually specified component stated in the contract. The amendments in the update are effective for fiscal years beginning after December 15, 2018. Early application is permitted and we are planning to adopt the standard on January 1, 2018. We are evaluating the possibility to elect hedge accounting treatment for iron ore derivatives that are currently not eligible for hedge accounting, but this is not expected to be fully evaluated at adoption of the new standard.

Reclassifications: We reclassified certain prior-year amounts to conform to the current-year presentation.

NOTE 2 - Supplementary Financial Statement Information
 

Research and Development Costs

We conduct a broad range of research and development activities aimed at improving existing products and manufacturing processes and developing new products and processes. Research and development costs, which are recorded as cost of products sold when incurred, totaled $28.1, $28.3 and $27.6 in 2017, 2016 and $17.5 in 2016, 2015 and 2014.2015.

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Allowance for Doubtful Accounts

Changes in the allowance for doubtful accounts for the years ended December 31, 2017, 2016 2015 and 2014,2015, are presented below:
2016 2015 20142017 2016 2015
Balance at beginning of year$6.0
 $9.0
 $8.1
$7.8
 $6.0
 $9.0
Increase (decrease) in allowance2.4
 (3.0) 0.9
(1.0) 2.4
 (3.0)
Receivables written off(0.6) 
 

 (0.6) 
Balance at end of year$7.8
 $6.0
 $9.0
$6.8
 $7.8
 $6.0


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Inventory, net

Inventories as of December 31, 20162017 and 2015,2016, consist of:
2016 20152017 2016
Finished and semi-finished$855.0
 $996.5
$1,009.6
 $855.0
Raw materials415.8
 410.0
408.5
 415.8
Total cost1,270.8
 1,406.5
1,418.1
 1,270.8
Adjustment to state inventories at LIFO value(156.9) (180.2)(270.3) (156.9)
Inventory, net$1,113.9
 $1,226.3
$1,147.8
 $1,113.9


During 2017 and 2016, liquidation of LIFO layers generated a losslosses of $2.9 and $6.0. There was no liquidation of LIFO layers in 2015 or 2014.2015. Changes in the LIFO reserve for the years ended December 31, 2017, 2016 2015 and 2014,2015, are presented below:
2016 2015 20142017 2016 2015
Balance at beginning of year$180.2
 $375.5
 $396.5
$156.9
 $180.2
 $375.5
Change in reserve(23.3) (195.3) (21.0)113.4
 (23.3) (195.3)
Balance at end of year$156.9
 $180.2
 $375.5
$270.3
 $156.9
 $180.2


Property, Plant and Equipment

Property, plant and equipment as of December 31, 20162017 and 2015,2016, consist of:
2016 20152017 2016
Land, land improvements and leaseholds$272.6
 $263.0
$275.3
 $272.6
Buildings489.6
 465.9
509.0
 489.6
Machinery and equipment5,714.0
 5,628.2
5,958.2
 5,714.0
Construction in progress92.8
 108.9
89.3
 92.8
Total6,569.0
 6,466.0
6,831.8
 6,569.0
Less accumulated depreciation(4,554.6) (4,379.5)(4,845.6) (4,554.6)
Property, plant and equipment, net$2,014.4
 $2,086.5
$1,986.2
 $2,014.4


Interest on capital projects capitalized in 2017, 2016 and 2015 was $1.9, $3.1 and 2014 was $3.1, $2.1 and $2.7.$2.1. Asset retirement obligations were $7.2$7.8 and $6.6$7.2 at December 31, 2017 and 2016.

Goodwill and Intangible Assets

Changes in goodwill for the years ended December 31, 2017, 2016 and 2015.2015 are presented below:
 2017 2016 2015
Balance at beginning of year$32.8
 $32.8
 $32.8
Acquisition221.0
 
 
Balance at end of year$253.8
 $32.8
 $32.8

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Intangible assets at December 31, 2017, consist of:
 Gross Amount Accumulated Amortization Net Amount
Customer relationships$36.6
 $(2.2) $34.4
Technology19.3
 (1.4) 17.9
Other1.0
 (0.4) 0.6
Intangible assets$56.9
 $(4.0) $52.9


Amortization expense related to intangible assets was $4.0 in 2017. Amortization expense is included in costs of products sold. The remaining average life of our intangible assets is 6.6 years for customer relationships and 5.6 years for technology. Estimated annual amortization expense for intangible assets over the next five years is $9.0 in 2018 and $8.4 each year from 2019 through 2022.

Other Non-current Assets

Other non-current assets as of December 31, 20162017 and 2015,2016, consist of:
2016 20152017 2016
Investments in affiliates$76.7
 $70.7
$77.5
 $76.7
Goodwill32.8
 32.8
Deferred tax assets53.2
 62.7
58.9
 53.2
Other35.2
 25.5
32.9
 35.2
Other non-current assets$197.9
 $191.7
$169.3
 $165.1


Our investment in AFSG Holdings, Inc. (“AFSG”) represented the carrying value of our former insurance and finance leasing businesses, which have been largely liquidated. The activities of the remaining operating companies are being “run off”. We have no obligation to support the operations or liabilities of these companies. As part of our ongoing strategic review of our business and operations, in 2015 we re-evaluated our investment in AFSG.AFSG Holdings, Inc. (“AFSG”), our former insurance and finance leasing businesses, which had been largely liquidated. During 2015, we received a distribution of $14.0 from AFSG. Since the distribution reduced our ability to recover our remaining investment in AFSG after the distribution, we determined our remaining investment in AFSG was impaired and recognized a non-cash charge of $41.6, or $0.23 per diluted share. In 2016, we sold the remaining non-captive insurance operations.

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Accrued Liabilities

Accrued liabilities as of December 31, 20162017 and 2015,2016, consist of:
2016 20152017 2016
Salaries, wages and benefits$105.6
 $69.4
$101.3
 $105.6
Interest35.2
 24.2
35.0
 35.2
Facility idling6.1
 22.1
Derivatives1.8
 41.2
Other85.4
 104.6
134.2
 93.3
Accrued liabilities$234.1
 $261.5
$270.5
 $234.1


In the fourth quarter of 2015, we temporarily idled the Ashland Works blast furnace and steelmaking operations (“Ashland Works Hot End”). We incurred acharges of $28.1 charge in the fourth quarter of 2015, which included $22.2 for supplemental unemployment and other employee benefit costs and $5.9 for equipment idling, asset preservation and other costs. The supplemental unemployment and other employee benefit costs were recorded as accrued liabilities, in the consolidated balance sheet, and the activity for the yearyears ended December 31, 2017 and 2016 was as follows:
 2017 2016
Balance at beginning of year $22.1
 $6.1
 $22.1
Payments (20.1) (5.3) (20.1)
Additions to the reserve 4.1
 0.6
 4.1
Balance at end of year $6.1
 $1.4
 $6.1


We estimate we will incur on-going costs of less than $2.0 per month for maintenance of the equipment, utilities and supplier obligations related to the temporarily idled Ashland Works Hot End. These costs were $21.2 and $22.1 for the yearyears ended December 31, 2017 and 2016.

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We continue to engage in regular reviews of the potential viability of the Ashland Works Hot End, including an assessment of the most significant risks and benefits of a permanent idling of those idled operations. As part of these reviews, we take into consideration, among other items, our strategic focus on reducing participation in commodity markets to position the company for sustainable profitability and whether we anticipate that future market conditions will enable production from the Ashland Works Hot End to generate sustainable economic returns through steel market cycles.

The carrying valueAshland Works Hot End remains on temporary idle and no final determination has been made at this time regarding the long-term status of the operations. However, we now believe it is unlikely that the Ashland Works Hot End will restart in the near term based on forecasted supply and demand characteristics of the markets that we serve. Our assessment and timing of the impairment charge was influenced by our current production capacity and an updated evaluation of the risk of not reaching new labor agreements on a timely basis for key facilities. Factors that influenced our impairment determination included an uncertain global trade landscape influenced by shifting domestic and international political priorities, continued intense competition from domestic steel competitors and foreign steel competition. These conditions directly impact our pricing, which in turn directly impacts our assessment of the demand forecasts for the markets we serve. Despite several successful trade cases, we continue to see a high level of carbon steel imports driven by global overcapacity, particularly in China. As a result, during the quarter ended December 31, 2017, we recognized a non-cash asset impairment charge of $75.6, primarily related to the long-lived assets associated with the temporarily idled operations totaled approximately $70.0 as of December 31, 2016.Ashland Works Hot End. If we decide to permanently idle the Ashland Works Hot End, we would incur certain cash expenses, including those relating to labor benefit obligations, certain take-or-pay supply agreements and potentially accelerated environmental remediation costs.

NOTE 3 - Acquisition of DearbornPrecision Partners
 

On September 16, 2014,August 4, 2017, we acquired Severstal Dearborn, LLC (“Dearborn”) from Severstal ColumbusPPHC Holdings, LLC (“Severstal”Precision Partners”). The assets, which provides advanced-engineered solutions, tool design and build, hot- and cold-stamped steel components and complex assemblies for the automotive market. Precision Partners is headquartered in Ontario, Canada and has over 1,000 employees, including approximately 300 engineers and skilled tool makers, across eight plants in Ontario, Alabama and Kentucky. We acquired from Severstal includedPrecision Partners to advance our core focus on the integrated steelmaking assets locatedhigh-growth automotive lightweighting market and our prominent position in Dearborn, Michigan (“Dearborn Works”), the Mountain State Carbon, LLC (“Mountain State Carbon”) cokemaking facility located in Follansbee, West Virginia, and interests in joint ventures that process flat-rolled steel products. The acquisition of Dearborn enhanced and complementedadvanced high strength steels, further strengthen our business and operational strategies by positioning our carbon steelmaking operations close to our majorcollaboration with automotive and other customers in the northern U.S., expanding our platform to meet the increasing light-weighting demands of our automotivemarket customers, and enhancing our operational flexibility. In addition, we acquired highly modernizedleverage both companies’ research and upgraded steelmaking equipmentinnovation in metals forming. The consolidated financial statements reflect the effects of the acquisition and facilities and achieved significant cost-based synergies. The final cashPrecision Partner’s financial results beginning August 4, 2017.

We paid the initial purchase price was $690.3,of $360.4, net of cash acquired. Immediately afteracquired, with cash on hand and borrowings under the acquisition, Dearborn was merged with and into AK Steel.

Credit Facility. The purchase price is subject to a customary working capital adjustment based on the final net working capital position at the closing date of the acquisition. For the year ended December 31, 2014,2017, we incurred acquisition costs of $8.1 in selling and administrative expenses,$6.2, primarily for transaction fees and direct costs, including legal, finance, consulting and other professional fees, and we incurred $12.6 offees. These costs in other income (expense) for committed bridge financing that we arranged but did not use for the Dearborn acquisition. For the year ended December 31, 2014, we incurred severance costs of $2.6are included in selling and administrative expenses for certain employees of Dearborn and an income tax charge of $8.4 for changes in the consolidated statements of operations.

A summary of the preliminary purchase price allocation for the fair value of deferred taxthe assets resulting fromacquired and the acquisition. The consolidated financial statements reflectobligations assumed at the effectsdate of the acquisition is presented below. The purchase price allocation is preliminary and Dearborn’s financial results beginning September 16, 2014.is subject to the completion of several items, including the final net working capital adjustment under the purchase agreement governing the terms of the acquisition.

During 2015, we sold our 50.0% equity interest in Double Eagle Steel Coating Company, which we acquired as part of the acquisition of Dearborn, for $25.0 in cash.
Accounts receivable$34.9
Inventory54.2
Other current assets2.2
Property, plant and equipment94.0
Amortizable intangible assets56.9
Goodwill221.0
Other non-current assets0.7
Total assets acquired463.9
Accounts payable(37.8)
Accrued liabilities(35.4)
Other non-current liabilities(31.9)
Total liabilities assumed(105.1)
Preliminary purchase price, net of cash acquired (including estimated net working capital adjustment)$358.8


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Goodwill is calculated as the excess of the purchase price over the net assets recognized and primarily represents the growth opportunities in lightweighting solutions to automotive customers, as well as any synergistic benefits to be realized from the acquisition. The goodwill is not deductible for income tax purposes and Precision Partners represents its own reporting unit for goodwill impairment assessments.

NOTE 4 - Investments in Affiliates
 

We have investments in several businesses accounted for using the equity method of accounting. Investees and equity ownership percentages are presented below:
  Equity Ownership %
Combined Metals of Chicago, LLC 40.0%
Delaco Processing, LLC 49.0%
Rockport Roll Shop LLC 50.0%
Spartan Steel Coating, LLC 48.0%


Cost of products sold includes $7.0, $12.3 and $6.7 in 2017, 2016 and $11.7 in 2016, 2015 and 2014 for our share of income of equity investees other than Magnetation. Our share of loss from Magnetation through the first quarter of 2015 is included in other income (expense) and totaled $16.3 and $15.2 for 2015 and 2014.$16.3. No amounts for Magnetation are included in our results after March 31, 2015, when the investment was written off. As of December 31, 2016,2017, our carrying cost of our investment in Spartan Steel exceeded our share of the underlying equity in net assets by $12.3.$10.8. This difference is being amortized and the amortization expense is included in cost of products sold.

Summarized financial statement data for all investees is presented below. The financial results for the joint ventures acquired with Dearborn—Spartan Steel and Delaco Processing—are only included for the period since the acquisition and the financial results for Magnetation are only included through March 31, 2015, since it was unlikely after that date that we would retain our equity interest as a result of Magnetation’s bankruptcy.
 2016 2015 2014 2017 2016 2015
Revenue $286.4
 $356.4
 $386.1
 $292.7
 $286.4
 $356.4
Gross profit 96.3
 68.3
 93.2
 88.9
 96.3
 68.3
Net income (loss) 31.8
 (9.8) 10.8
 20.7
 31.8
 (9.8)
 2016 2015 2017 2016
Current assets $94.1
 $89.3
 $115.2
 $94.1
Noncurrent assets 66.0
 66.9
 73.5
 66.0
Current liabilities 14.4
 14.5
 16.2
 14.4
Noncurrent liabilities 44.8
 33.8
 58.9
 44.8


We regularly transact business with these equity investees. Transactions with all equity investees, including Magnetation, for the years indicated are presented below:
2016 2015 20142017 2016 2015
Sales to equity investees$69.2
 $61.4
 $93.4
$80.6
 $69.2
 $61.4
Purchases from equity investees213.5
 251.0
 67.7
33.0
 213.5
 251.0

Outstanding receivables and payables with all equity investees as of the end of the year indicated are presented below:
2016 20152017 2016
Accounts receivable from equity investees$2.6
 $0.4
$0.7
 $2.6
Accounts payable to equity investees4.1
 33.1
4.1
 4.1


Magnetation

As of March 31, 2015, we concluded that our 49.9% equity interest in Magnetation was fully impaired and recorded a non-cash impairment charge of $256.3 for the quarter ended March 31, 2015. Key factors that affected our conclusion that an other-than-temporary impairment had occurred as of March 31, 2015, included (i) the significant market decline in global iron ore pellet pricing during the first quarter of 2015 and resulting negative cash flow effects on Magnetation’s results; (ii) a less favorable longer-term forecast of iron ore prices and resulting cash flow outlook for Magnetation; (iii) the likely loss of our equity interest in Magnetation if it filed for bankruptcy; and (iv) Magnetation’s existing capital structure and its inability to raise additional capital from third parties or the equity holders. Before March 31, 2015, we believed that the fair value of our interest in Magnetation exceeded its carrying amount
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and that despite near-term temporary pressures on liquidity, long-term cash flow
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projections of Magnetation were sufficient to allow us to recover our investment in Magnetation. During the quarter ended March 31, 2015, theHowever, a combination of events and circumstances caused Magnetation to face near-term liquidity issues faced by Magnetation intensified due to a combination of an approximately 20.0% decline in the daily IODEX index and substantially lower IODEX futures pricing toward the end of the quarter, a slower-than-expected ramp-up of its pellet plant operations and resulting lower sales levels, payments due for construction overruns on the pellet and third concentrate plants, and higher-than-expected start-up and operating costs. Although Magnetation accomplished several actions in late 2014 and early 2015 to increase its liquidity, such liquidity enhancements and other cost reduction initiatives did not increase liquidity enough for it to withstand the significant market decline in iron ore pricing during the first quarter of 2015. Based on the outlook for iron ore prices at March 31, 2015, we concluded that prices could remain suppressed for the near future and it raised questions about the ability of Magnetation to operate profitably. In March 2015, Magnetation began discussions with certain debtholders to seek a solution to its liquidity issues. We also participated in those discussions but no acceptable restructuring was agreed upon. On May 5, 2015, Magnetation and its subsidiaries filed voluntary petitions for relief under Chapter 11 of the Bankruptcy Code with the United States Bankruptcy Court for the District of Minnesota. Magnetation’s outstanding indebtedness is non-recourse to us. We are not required to make any additional capital contributions or other future investments in Magnetation and have not guaranteed any obligations of Magnetation.

On October 6, 2016, the Bankruptcy Court approved a Global Settlement Agreement (“Settlement Agreement”) among us, Magnetation, Magnetation Inc., and Magnetation’s revolving credit facility lenders, senior secured noteholders and debtor-in-possession facility lenders to terminate the iron ore pellet offtake agreement with Magnetation and to wind down Magnetation’s business. Among other terms of the Settlement Agreement, we agreed to make a cash payment (“Termination Payment”) to Magnetation’s Chapter 11 estate in order to terminate our offtake agreement with Magnetation and cease purchasing iron ore pellets from Magnetation. The next day, the transactions contemplated by the Settlement Agreement were completed and we made a Termination Payment of $36.6, thereby terminating the pellet offtake agreement.

Also in connection with the approval of the Settlement Agreement and the payment of the Termination Payment to the bankruptcy estate, we recognized a charge in the fourth quarter of 2016 for the Termination Payment and a charge of $32.9 for the present value of remaining obligations under contracts with other third parties to transport pellets to our facilities. The actual paymentsIn the fourth quarter of 2017, we reached an agreement for these contracts will be made overtransportation services that provides a timeframe to begin using the next 12 years. We are working on actions to mitigate our expense for these contracts, but can give no assurancerail cars that we will be successful. We expect to purchase replacement iron ore pellets from third-party producers who can meet our future needs by offering superior reliability, consistent quality and more competitive pricing. In addition, we expect to benefit from enhanced flexibility with iron ore pellets aswere idled after the termination of the pellet supply agreement. As a result, we recorded a credit of terminating our offtake agreement with Magnetation.$19.3 during the fourth quarter of 2017 to reduce the unpaid liability.

NOTE 5 - Income Taxes


We and our subsidiaries file a consolidated federal income tax return that includes all domestic companies owned 80% or more by us and the proportionate share of our interest in equity method investments. State tax returns are filed on a consolidated, combined or separate basis depending on the applicable laws relating to us and our domestic subsidiaries.

Components of income (loss) before income taxes for the years ended December 31, 2017, 2016 2015 and 2014,2015, are presented below:
2016 2015 20142017 2016 2015
United States$(11.3) $(452.1) $(94.3)$(20.5) $(11.3) $(452.1)
Foreign6.7
 6.5
 5.1
9.7
 6.7
 6.5
Noncontrolling interests66.0
 62.8
 62.8
61.4
 66.0
 62.8
Income (loss) before income taxes$61.4
 $(382.8) $(26.4)$50.6
 $61.4
 $(382.8)


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Significant components of deferred tax assets and liabilities at December 31, 20162017 and 20152016 are presented below:
2016 20152017 2016
Deferred tax assets:      
Net operating and capital loss and tax credit carryforwards$835.2
 $847.3
$619.5
 $835.2
Postretirement benefits142.6
 158.9
92.5
 142.6
Pension benefits260.3
 278.6
117.5
 260.3
Inventories127.2
 139.2
98.8
 127.2
Other assets125.1
 132.8
71.6
 125.1
Valuation allowance(1,175.2) (1,215.5)(727.7) (1,175.2)
Total deferred tax assets315.2
 341.3
272.2
 315.2
Deferred tax liabilities: 
  
 
  
Depreciable assets(213.3) (248.0)(121.9) (213.3)
Other liabilities(48.7) (30.6)(111.4) (48.7)
Total deferred tax liabilities(262.0) (278.6)(233.3) (262.0)
Net deferred tax assets$53.2
 $62.7
$38.9
 $53.2


We regularly evaluate the need for a valuation allowance for deferred tax assets by assessing whether it is more likely than not that we will realize future deferred tax assets. We assess the valuation allowance each reporting period and reflect any additions or adjustments in earnings in the same period. When we assess the need for a valuation allowance, we consider both positive and negative evidence of the likelihood that we will realize deferred tax assets in each jurisdiction. In general, cumulative losses in recent periods provide significant objective negative evidence on our ability to generate future taxable income. As of December 31, 2017 and 2016, and 2015, we
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concluded that the negative evidence outweighed the positive evidence and we recorded a valuation allowance for a significant portion of our deferred tax assets. To determine the appropriate valuation allowance, we considered the timing of future reversal of our taxable temporary differences and available tax strategies that, if implemented, would result in realizing deferred tax assets. We identified the potential change from the LIFO inventory accounting method as such a tax-planning strategy. We believe that this strategy is prudent and feasible to use certain federal and state tax loss carryforwards before their expirations. In addition, we believe that the future reversal of our deferred tax liabilities serves as a source of taxable income that supports realizing a portion of our federal and state deferred tax assets. This accounting treatment has no effect on our ability to use the loss carryforwards and tax credits to reduce future cash tax payments.

Changes in the valuation allowance for the years ended December 31, 2017, 2016 2015 and 2014,2015, are presented below:
2016 2015 20142017 2016 2015
Balance at beginning of year$1,215.5
 $1,000.4
 $764.1
$1,175.2
 $1,215.5
 $1,000.4
Change in valuation allowance:          
Included in income tax expense (benefit)8.8
 228.6
 36.7
(62.8) 8.8
 228.6
Change in deferred assets in other comprehensive income(49.1) (13.5) 199.6
11.0
 (49.1) (13.5)
Effect of tax rate changes(395.7) 
 
Balance at end of year$1,175.2
 $1,215.5
 $1,000.4
$727.7
 $1,175.2
 $1,215.5


At December 31, 2016,2017, we had $2,309.3$2,634.0 in federal regular net operating loss carryforwards and $2,570.5 in federal alternative minimum tax (“AMT”) net operating loss carryforwards, which will expire between 2023 and 2035. In 2016 we generated taxable income and used approximately $42.6 of federal regular net operating loss carryforwards.2037. At December 31, 2016,2017, we had unused AMT credit carryforwards of $8.9 and research and development (“R&D”) credit carryforwards of $1.2. We$1.2 that we may use the loss and credit carryforwards to offset future regular and AMT income tax liabilities. We may carry unused AMT credits forward indefinitely and theThe R&D credits don’t begin to expire until 2027.between 2027 and 2028. At December 31, 2016,2017, we had $75.9$96.6 in deferred tax assets before considering valuation allowances for state net operating loss carryforwards and tax credit carryforwards, before considering valuation allowances, which will expire between 20172018 and 2036.2037.

AsSignificant components of income tax expense are presented below:
 2017 2016 2015
Current:     
Federal$(4.5) $(3.7) $
State0.3
 0.2
 0.2
Foreign2.4
 1.7
 1.8
Deferred: 
  
  
Federal(1.0) 23.3
 68.8
State(4.4) 2.3
 6.5
Foreign(0.4) 
 
Benefits of operating loss carryforwards
 (16.1) 
Amount allocated to other comprehensive income(8.6) (4.5) (13.2)
Change in valuation allowance on beginning-of-the-year deferred tax assets(0.8) 
 (0.7)
Income tax expense (benefit)$(17.0) $3.2
 $63.4


The Tax Cuts and Jobs Act of 2017 (the “Tax Act”), signed into law on December 22, 2017, reduces the corporate income tax rate to 21% beginning in 2018, among other provisions. While the effective date of the new corporate tax rates for us is January 1, 2018, we are required to calculate the effects of changes in tax rates and laws on deferred tax balances in 2017, the period in which the legislation was enacted. We have not completed our determination of the accounting implications of the Tax Act on our tax balances. However, we have reasonably estimated the provisional effects of the Tax Act in the consolidated financial statements as of December 31, 2016, there were $21.3 of unrecognized2017.

At December 31, 2017, we remeasured our deferred tax assets fromand liabilities based on the rate at which they are expected to reverse in the future, which is generally 21% at the U.S. federal level. As a result, our income tax deductionsexpense for share-based compensation in excess of compensation recognized for financial reporting when net operating loss carryforwards were created.

In the fourth quarter of 2016, we sold2017 includes a non-cash charge of $32.1 for the decrease in the value of our non-captive insurance companies that were partnet deferred tax assets.

The Tax Act requires us to calculate the undistributed earnings of AFSG. Federal incomeour foreign subsidiaries, as determined under U.S. tax regulations require that we reduceprinciples, and include a portion of these earnings in our available net operating loss carryovers by2017 taxable income. The transition tax provisions of the amounts attributable to these companies. Accordingly, we reduced both our regularTax Act are complex, and the Department of Treasury has issued preliminary guidance for taxpayers, with further guidance expected over the next several months. We calculated an estimated transition tax and our AMT net operating loss carryovers atas of December 31, 2016 by $18.5. We2017 and will no longer be able to use these loss carryforwards incomplete our analysis of the future. The saletransition tax as we complete our tax return filings for 2017, including (1) confirming the accumulated earnings of these companies generated a capital loss carryover for tax purposes of approximately $31.2 which will expire in 2021. The deferred tax asset related to this loss is included in the components of deferred taxforeign subsidiaries as determined using U.S.
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assetstax principles and liabilities in(2) determining the table above. After considerationappropriate allocation of the needearnings between amounts invested in cash and the amounts invested in non-cash assets. We do not expect to incur a cash tax liability for valuation allowances on these changes in our deferredthe transition tax assets, there was no effect on ourdue to the availability of existing net income (loss) in 2016 asoperating loss carryforwards.

As a result of the sale.

Wetransition tax inclusion, we had no undistributed earnings of foreign subsidiaries of approximately $25.9 at December 31, 2016.2017 that had not been subject to U.S. income tax. Consequently, there will generally be no incremental U.S. taxable income generated if we repatriate these earnings in the future. However, foreign withholding taxes on dividend distributions could apply, unless they are eliminated by a treaty between the United States and the country where our foreign affiliate is located. Since we consider these earnings to be permanently invested in our foreign subsidiaries, we did not record deferredany withholding taxes for them.that would be assessed if the earnings were repatriated by payment of a dividend. If we repatriated the earnings, we estimate that the additionalwithholding tax expenseliability would not be approximately $7.9 before considering the effects on the valuation allowance.material at December 31, 2017.

Significant componentsWe do not expect to incur cash tax liabilities associated with the provisions of the Tax Act in the foreseeable future due to the availability to us of existing net operating loss carryforwards. Our net operating loss carryovers generated through 2017 retain the original 20-year carryover periods and can be used to offset future taxable income tax expense are presented below:
 2016 2015 2014
Current:     
Federal$(3.7) $
 $
State0.2
 0.2
 (1.1)
Foreign1.7
 1.8
 2.1
Deferred: 
  
  
Federal23.3
 68.8
 7.7
State2.3
 6.5
 0.2
Benefits of operating loss carryforwards(16.1) 
 
Amount allocated to other comprehensive income(4.5) (13.2) 
Change in valuation allowance on beginning-of-the-year deferred tax assets
 (0.7) (1.2)
Income tax expense$3.2
 $63.4
 $7.7

without limitation.

The reconciliation of income tax on income (loss) before income taxes computed at the U.S. federal statutory tax rates to actual income tax expense is presented below:
2016 2015 20142017 2016 2015
Income tax expense (benefit) at U.S. federal statutory rate$21.5
 $(134.0) $(9.2)$17.7
 $21.5
 $(134.0)
Income tax expense calculated on noncontrolling interests(23.1) (22.0) (22.0)(21.5) (23.1) (22.0)
State and foreign tax expense, net of federal tax1.3
 (0.9) (3.1)3.4
 1.3
 (0.9)
Increase in deferred tax asset valuation allowance8.8
 228.6
 36.7
Increase (decrease) in deferred tax asset valuation allowance(51.9) 8.8
 228.6
Amount allocated to other comprehensive income(4.5) (13.2) 
(8.6) (4.5) (13.2)
Stock compensation in excess of tax deduction
 
 2.0
Charge for U.S. tax legislation32.1
 
 
Transition tax on foreign earnings7.9
 
 
Other differences(0.8) 4.9
 3.3
3.9
 (0.8) 4.9
Income tax expense$3.2
 $63.4
 $7.7
Income tax expense (benefit)$(17.0) $3.2
 $63.4


Our federal, state and local tax returns are subject to examination by various taxing authorities. Federal returns for periods beginning in 2013 are open for examination, while certain state and local returns are open for examination for periods beginning in 2007. However, taxing authorities have the ability to adjust net operating loss carryforwards generated in years before these periods. We have not recognized certain tax benefits because of the uncertainty of realizing the entire value of the tax position taken on income tax returns until taxing authorities review them. We have established appropriate income tax accruals, and believe that the outcomes of future federal examinations, as well as ongoing and future state and local examinations, will not have a material adverse impact on our financial position, results of operations or cash flows. When statutes of limitations expire or taxing authorities resolve uncertain tax positions, we will adjust income tax expense for the unrecognized tax benefits. We have no tax positions for which it is reasonably possible that the total amounts of unrecognized tax benefits will significantly change within twelve months of December 31, 2016.2017.

A reconciliation of the change in unrecognized tax benefits for 2017, 2016 2015 and 20142015 is presented below:
2016 2015 20142017 2016 2015
Balance at beginning of year$130.3
 $59.9
 $53.8
$124.2
 $130.3
 $59.9
Decreases for prior year tax positions(4.5) (0.3) (0.2)(0.5) (4.5) (0.3)
Increases (decreases) for current year tax positions(1.6) 70.7
 7.7
0.3
 (1.6) 70.7
Decreases from statute lapses
 
 (1.4)
Increases (decreases) related to tax rate changes (a)(34.6) 
 
Balance at end of year$124.2
 $130.3
 $59.9
$89.4
 $124.2
 $130.3


(a)As a result of the Tax Act, the value of unrecognized tax benefits associated with NOL carryforwards and other temporary differences was reduced to reflect the lower tax rates that will apply if the uncertainties related to these deferred tax assets materialize in the future.

Included in the balance of unrecognized tax benefits at December 31, 2017 and 2016, are $75.0 and 2015, are $107.4 and $111.6 of tax benefits that, if recognized, would affect the effective tax rate. Also included in the balance of unrecognized tax benefits at December 31, 2017 and 2016, and
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2015, are $16.8$14.4 and $18.7$16.8 of tax benefits that, if recognized, would result in adjustments to other tax accounts, primarily deferred taxes.

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NOTE 6 - Long-term Debt and Other Financing
 

Debt balances at December 31, 20162017 and 2015,2016, are presented below:
2016 20152017 2016
Credit Facility$
 $550.0
$450.0
 $
7.50% Senior Secured Notes due July 2023 (effective rate of 8.3%)380.0
 
380.0
 380.0
8.75% Senior Secured Notes due December 2018
 380.0
5.00% Exchangeable Senior Notes due November 2019 (effective rate of 10.8%)150.0
 150.0
150.0
 150.0
7.625% Senior Notes due May 2020529.8
 529.8

 529.8
7.625% Senior Notes due October 2021406.2
 406.2
406.2
 406.2
8.375% Senior Notes due April 2022279.8
 290.2

 279.8
6.375% Senior Notes due October 2025 (effective rate of 7.1%)280.0
 
7.00% Senior Notes due March 2027400.0
 
Industrial Revenue Bonds due 2020 through 202899.3
 99.3
99.3
 99.3
Capital lease for Research and Innovation Center25.2
 

 25.2
Unamortized debt discount/premium and debt issuance costs(53.7) (51.4)
Unamortized debt discount and issuance costs(55.4) (53.7)
Total long-term debt$1,816.6
 $2,354.1
$2,110.1
 $1,816.6


During 2016,2017, we were in compliance with all the terms and conditions of our debt agreements.

Maturities of long-term debt excluding the capital lease, for the next five years, at December 31, 2016,2017, are presented below:
Year  Debt Maturities  Debt Maturities
2017 $
2018 
 $
2019 150.0
 150.0
2020 537.1
 7.3
2021 406.2
 406.2
2022 450.0


Credit Facility

We haveIn September 2017, we entered a $1,500.0new $1,350.0 revolving credit facility (the “Credit Facility”), which expires in March 2019September 2022 and is guaranteed by AK Steel’s parent company, AK Holding, and by AK Tube LLC (“AK Tube”), AK Steel Properties, Inc. (“AK Properties”) and Mountain State Carbon LLC (“Mountain State Carbon”), three 100%-owned subsidiaries of AK Steel (AK Tube, AK Properties, and Mountain State Carbon being hereinafter referred(referred to together as the “Subsidiary Guarantors”). The Credit Facility replaced our previous $1,500.0 revolving credit facility (“Replaced Credit Facility”), which was set to expire in March 2019, and is secured by the same classes of assets as the Replaced Facility. The Credit Facility contains commoncustomary restrictions, including limitations on, among other things, distributions and dividends, acquisitions and investments, dispositions, indebtedness, liens and affiliate transactions. The Credit Facility requires that we maintain a minimum fixed charge coverage ratio of one to one if availability under the Credit Facility is less than $150.0.$135.0. The Credit Facility’s current availability significantly exceeds $150.0.$135.0. Availability is calculated as the lesser of the total commitments under the Credit Facility commitments or eligible collateral after advance rates, less outstanding revolver borrowings and letters of credit. We secure our Credit Facility obligations with our inventory and accounts receivable, and the Credit Facility’s availability fluctuates monthly based on the varying levels of eligible collateral. We do not expect any of these restrictions to affect or limit our ability to conduct business in the ordinary course. The Credit Facility includes a separate “first-in, last-out”, or “FILO” tranche, which allows us to use a portion of our eligible collateral at higher advance rates.

At December 31, 2016,2017, our eligible collateral,aggregate borrowing base, after application of applicable advance rates, was $1,257.1.$1,328.8. As of December 31, 2016, there were no2017, we had $450.0 in outstanding borrowings. Availability as of December 31, 20162017 was further reduced by $70.7$71.5 for outstanding letters of credit, resulting in remaining availability of $1,186.4.$807.3. The weighted-average interest rate on the outstanding borrowings at December 31, 20152017 was 2.4%3.27%.

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Senior Secured Notes
 
In June 2016, as part of a transaction to refinance our 8.75% Senior Secured Notes due 2018 (the “Old Notes”), we issuedAK Steel has outstanding $380.0 aggregate principal amount of 7.50% Senior Secured Notes due July 2023 (the “Secured Notes”) and generated net proceeds of $373.4
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after underwriting discount.. The Secured Notes are fully and unconditionally guaranteed by AK Holding and the Subsidiary Guarantors. The Secured Notes are secured by first priority liens on the plant, property and equipment (other than certain excluded property, and subject to permitted liens) of AK Steel and the Subsidiary Guarantors and any proceeds of the foregoing.from them. The book value of the collateral as of December 31, 20162017 was approximately $1.6$1.5 billion. The indenture governing the Secured Notes includes covenants with customary restrictions on (a) the incurrence of additional debt by certain subsidiaries, (b) the incurrence of certain liens, (c) the incurrence of sale/leaseback transactions, (d) the use of proceeds from the sale of collateral, and (e) our ability to merge or consolidate with other entities or to sell, lease or transfer all or substantially all of our assets to another entity. The Secured Notes also contain customary events of default. Before July 15, 2019, we may redeem the Secured Notes at a price equal to 100.000% of par plus a make-whole premium and all accrued and unpaid interest to the date of redemption. After July 15, 2019, we may redeem them at 103.750% until July 15, 2020, 101.875% until July 15, 2021, and 100.000% thereafter, together with all accrued and unpaid interest to the date of redemption.

After the issuance ofwe issued the Secured Notes in 2016, we repurchased $251.7 of Old Notes through a cash tender offer (the “Tender Offer”) at a tender price equal to 104.750% of principal plus accruedprior senior secured notes and unpaid interest. The remaining outstanding Old Notes were redeemed at a redemption price of 104.375% plus accrued and unpaid interest. In 2016, we recognized other expense of $12.4 for expenses related to the Tender Offer, the call premium paid on the remaining Old Notes that were redeemed and the write-off of unamortized debt discount and issue costs related to the Old Notes. Fees of $14.8 paid to the holders of the Old Notes to tender their notes and expenses paid to third parties related to the issuance of the Secured Notes were recognized as an adjustment to the carrying amount of the Secured Notes and will be recognized over their term as an adjustment to interest expense.retirement in 2016.

Exchangeable Notes

AK Steel has outstanding 5.0% Exchangeable Senior Notes due November 2019 (the “Exchangeable Notes”). We may not redeem the Exchangeable Notes before their maturity date. The indenture governing the Exchangeable Notes (the “Exchangeable Notes Indenture”) provides holders with an exchange right at their option before August 15, 2019, if the closing price of our common stock is greater than or equal to $7.02 per share (130% of the exchange price of the Exchangeable Notes) for at least 20 trading days during the last 30 consecutive trading days of a calendar quarter. As a result of meeting this trigger at January 1, 2017, this exchange right was triggered for the quarter ended December 31, 2016, and will remain available until March 31, 2017. Thereafter, the triggering condition will be reassessed at the beginning of each quarter while any Exchangeable Notes remain outstanding. We would be required to pay cash to holders for the principal amount of the Exchangeable Notes and to pay cash or issue common stock (at our option) for the premium if the holders elect to exchange their Exchangeable Notes during the first quarter of 2017. As a result, a portion of the equity component of the Exchangeable Notes, calculated as the difference between the principal amount of the Exchangeable Notes and the carrying amount of the liability component of the Exchangeable Notes, was considered redeemable and classified as temporary equity of $21.3 on the consolidated balance sheets at December 31, 2016. The triggering condition was not met as of January 1, 2018. The triggering condition is reassessed at the beginning of each quarter while any Exchangeable Notes remain outstanding. We would be required to pay cash to holders for the principal amount of the Exchangeable Notes and to pay cash or issue common stock (at our option) for the premium if the holders elect to exchange their Exchangeable Notes. If holders of Exchangeable Notes elect to exchange, we expect to fund any cash settlement from cash or borrowings under our Credit Facility or both. There have been no exchanges as of the date of this filing.

On or after August 15, 2019, holders may exchange their Exchangeable Notes at any time, and we would be obligated to (i) pay an amount in cash equal to the aggregate principal amount of the Exchangeable Notes to be exchanged and (ii) at our election, pay cash, deliver shares of AK Holding common stock or a combination for any remaining exchange obligation in excess of the aggregate principal amount of the Exchangeable Notes being exchanged. Holders may exchange their Exchangeable Notes into shares of AK Holding common stock at their option at an initial exchange rate of 185.1852 shares of AK Holding common stock per $1,000 principal amount of Exchangeable Notes. The initial exchange rate is equivalent to a conversion price of approximately $5.40 per share of common stock, which equates to 27.8 million shares to be used to determine the aggregate equity consideration to be delivered upon exchange, which could be adjusted for certain dilutive effects from potential future events. Holders may exchange their Exchangeable Notes before August 15, 2019 only under certain circumstances. The Exchangeable Notes Indenture does not contain any financial or operating covenants or restrict us or our subsidiaries from paying dividends, incurring debt or issuing or repurchasing securities. If we undergo a fundamental change, as defined in Exchangeable Notes Indenture (which, for example, would include various transactions in which we would undergo a change of control), holders may require us to repurchase the Exchangeable Notes in whole or in part for cash at a price equal to par plus any accrued and unpaid interest. In addition, if we undergo a “make-whole fundamental change,” as defined in the Exchangeable Notes Indenture, before the maturity date, in addition to requiring us to repurchase the Exchangeable Notes in whole or in part for cash at a price equal to par plus any accrued and unpaid interest, the exchange rate will be increased in certain circumstances for holders who elect to exchange their notes in connection with the event.

Based on the initial exchange rate, the Exchangeable Notes are exchangeable into a maximum of 37.5 million shares of AK Holding common stock. However, we would only deliver the maximum amount of shares if, following a “make-whole fundamental change” described above, we elect to deliver the shares to satisfy the higher exchange rate. Although the Exchangeable Notes were issued at par, for accounting purposes the proceeds received from the issuance of the notes are allocated between debt and equity to reflect the fair value of the exchange option embedded in the notes and the fair value of similar debt without the exchange option. Therefore, we recorded $38.7 of the gross proceeds of the Exchangeable Notes as an increase in additional paid-in capital with the offsetting amount recorded as a debt discount. We are amortizing the debt discount and issuance costs over the term of the Exchangeable Notes using the
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effective interest method. As of December 31, 20162017 and 2015,2016, the net carrying amount of the Exchangeable Notes was $128.7$135.3 and $122.7. The value$128.7.

Table of the Exchangeable Notes if exchanged as of December 31, 2016, would have exceeded the principal amount by $140.7.Contents

Senior Unsecured Notes

AK Steel has outstanding 7.625% Senior Notes due May 2020 (the “2020 Notes”). We may redeem the 2020 Notes at a price equal to 102.542%$406.2 aggregate principal amount of par until May 15, 2017, 101.271% thereafter until May 15, 2018, and 100.0% thereafter, together with all accrued and unpaid interest to the date of redemption.

AK Steel has outstanding 7.625% Senior Notes due October 2021 (the “2021 Notes”). The 2021 Notes were issued under a supplemental indenture, which includes covenants and restrictions substantially similar to the existing indentures governing the 7.625% Senior Notes due 2020 and the 8.375% Senior Notes due 2022 and are equal in right of payment to those notes. Before October 1, 2017, weWe may redeem the 2021 Notes at a price equal to par plus a make-whole premium and all accrued and unpaid interest to the date of redemption. After that date, they are redeemable at 103.813% until October 1, 2018, 101.906% thereafter until October 1, 2019, and 100.0% thereafter, together with all accrued and unpaid interest to the date of redemption.

AK Steel’sSteel has outstanding $280.0 aggregate principal amount of 6.375% Senior Unsecured Notes due October 2025 (the “2025 Notes”). The 2025 Notes were issued in August 2017 as part of a transaction to refinance our 8.375% Senior Notes are due April 2022, (the “2022 Notes”).and generated net proceeds of $275.8 after underwriting discount. Before April 1, 2017,October 15, 2020, we may redeem the 20222025 Notes at a price equal to par plus a make-whole premium and all accrued and unpaid interest to the date of redemption. After that date, they are redeemablewe may redeem them at 104.188%103.188% until April 1, 2018, 102.792%October 15, 2021, 101.594% thereafter until April 1, 2019, 101.396% thereafter until April 1, 2020,October 15, 2022, and 100.0%100.000% thereafter, together with all accrued and unpaid interest to the date of redemption. In 2017, we recognized other expense of $8.4 related to the issuance of the 2025 Notes and retirement of the 2022 Notes. Fees paid to holders of the 2022 Notes to tender their notes and expenses paid to third parties related to the issuance of the 2025 Notes totaling $10.6 were recognized as an adjustment of the carrying amount of the 2025 Notes and are being amortized over their term as an adjustment to interest expense.
AK Steel has outstanding $400.0 aggregate principal amount of 7.00% Senior Unsecured Notes due March 2027 (the “2027 Notes”). The 2027 Notes were issued in March 2017 as part of a transaction to refinance our 7.625% Senior Notes due May 2020, and generated net proceeds of $394.0 after underwriting discount. Before March 15, 2022, we may redeem the 2027 Notes at a price equal to par plus a make-whole premium and all accrued and unpaid interest to the date of redemption. After that date, we may redeem them at 103.500% until March 15, 2023, 102.333% thereafter until March 15, 2024, 101.167% thereafter until March 15, 2025, and 100.000% thereafter, together with all accrued and unpaid interest to the date of redemption. In 2017, we recognized other expense of $13.1 related to the issuance of the 2027 Notes and retirement of the 2020 Notes. Fees paid to holders of the 2020 Notes to tender their notes and expenses paid to third parties related to the issuance of the 2027 Notes totaling $7.5 were recognized as an adjustment of the carrying amount of the 2027 Notes and are being amortized over their term as an adjustment to interest expense.

The Exchangeable Notes, the 2020 Notes, the 2021 Notes, the 20222025 Notes, the 2027 Notes and the unsecured industrial revenue bonds (“IRBs”) discussed below (collectively, the “Senior Unsecured Notes”) are equal in right of payment. AK Holding and the Subsidiary Guarantors each fully and unconditionally, jointly and severally, guarantees the payment of interest, principal and premium, if any, on the Senior Unsecured Notes other than the Exchangeable Notes, which are guaranteed only by AK Holding. The indentures governing the 2020 Notes, the 2021 Notes, the 20222025 Notes, the 2027 Notes and the unsecured IRBs include covenants with customary restrictions on (a) the incurrence of additional debt by certain subsidiaries, (b) the incurrence of certain liens, (c) the amount of sale/leaseback transactions, and (d) our ability to merge or consolidate with other entities or to sell, lease or transfer all or substantially all of our assets to another entity. The indentures governing the Senior Unsecured Notes also contain customary events of default. The Senior Unsecured Notes rank junior in priority to the Secured Notes to the extent of the value of the assets securing the Secured Notes.

During 2016, we repurchased an aggregate principal amount of $10.4 of the 2022 Notes in private, open market transactions. We completed these repurchases at a discount to the notes’ par value and recognized a net gain on the repurchases totaling $3.0 for the year ended December 31, 2016, which is included in other income (expense). During 2015, we repurchased an aggregate principal amount of $23.8 of the 2021 Notes in private, open market transactions. These repurchases were unsolicited and completed at a discount to the notes’ par values. We recognized gains on the repurchases of $9.4 for the year ended December 31, 2015, which is included in other income (expense). We may, from time to time, repurchase additional outstanding notes in the open market on an unsolicited basis, by tender offer, through privately negotiated transactions or otherwise.

Industrial Revenue Bonds

AK Steel has outstanding $73.3 aggregate principal amount of fixed-rate tax-exempt IRBs (the “unsecured IRBs”) at December 31, 2016.2017. The weighted-average fixed interest rate of the unsecured IRBs is 6.8%. The unsecured IRBs are unsecured senior debt obligations of AK Steel that are equal in ranking with the other Senior Unsecured Notes. In addition, AK Steel has outstanding $26.0 aggregate principal amount of variable-rate taxable IRBs at December 31, 2016,2017, that are backed by letters of credit.

Research and Innovation Center Lease

In the fourth quarter of 2016,October 2017, we moved into a newacquired the Research and Innovation Center incapital lease. As a result, the Cincinnati/Dayton growth corridor. The new facility replaces our former research facility in Middletown, Ohio. The $36.0 projectliability was primarily financed through a $25.2 long-term capital lease, which is included in long-term debt in the consolidated balance sheets. Lease payments will escalate 2.0% per year from $2.1 in 2017 to $3.0 in the last year of the initial term ending in 2034, when we have the option to purchase the facility and land for $15.0 or to renew the lease. The lease has customary restrictions on our use of the facility. We have included the leased property in property, plant and equipment in the consolidated balance sheets.effectively settled.

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NOTE 7 - Pension and Other Postretirement Benefits
 

Summary

We provide noncontributory pension and various healthcare and life insurance benefits to a significant portion of our employees and retirees. Benefits are provided through defined benefit and defined contribution plans that we administer,sponsor, as well as multiemployer plans for certain union members. TheOur defined benefit pension plan isplans are not fully funded. We estimate that we will be required to make pension contributions of approximately $45.0$51.0 for 2017.2018. Based on current actuarial assumptions, we expect to make required pension contributions of approximately $60.0$35.0 for 20182019 and $75.0$10.0 for 2019.2020. Factors that affect future funding projections include differences between expected and actual returns on plan assets, actuarial data and assumptions relating to plan participants, the discount rate used to measure the pension obligations and changes to regulatory funding requirements. We expect to make other postretirement benefit (“OPEB”) payments, after receipt of Medicare subsidy reimbursements, of approximately $40.0$38.8 in 2017.

2018.
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Defined Benefit Plans

Plan Obligations

Amounts presented below are calculated based on benefit obligation and asset valuation measurement dates of December 31, 20162017 and 2015:2016:
Pension Benefits Other BenefitsPension Benefits Other Benefits
2016 2015 2016 20152017 2016 2017 2016
Change in benefit obligations:              
Benefit obligations at beginning of year$3,247.4
 $3,545.2
 $488.6
 $599.3
$2,874.8
 $3,247.4
 $443.7
 $488.6
Service cost3.0
 2.2
 4.9
 7.1
2.8
 3.0
 4.7
 4.9
Interest cost120.4
 130.0
 19.9
 22.5
108.2
 120.4
 17.3
 19.9
Plan participants’ contributions
 
 25.6
 24.9

 
 23.3
 25.6
Actuarial loss (gain)45.1
 (147.8) (35.1) (83.3)91.0
 45.1
 27.1
 (35.1)
Amendments8.4
 13.3
 
 (5.6)
 8.4
 (4.7) 
Contributions to Zanesville retirees’ VEBA trust
 
 
 (3.1)
Benefits paid(339.1) (295.1) (65.6) (76.5)(269.0) (339.1) (65.5) (65.6)
Annuity settlement(210.3) 
 
 

 (210.3) 
 
Medicare subsidy reimbursement received
 
 5.4
 3.3

 
 2.6
 5.4
Foreign currency exchange rate changes(0.1) (0.4) 
 
0.2
 (0.1) 
 
Benefit obligations at end of year$2,874.8
 $3,247.4
 $443.7
 $488.6
$2,808.0
 $2,874.8
 $448.5
 $443.7
              
Change in plan assets: 
  
  
  
 
  
  
  
Fair value of plan assets at beginning of year$2,511.4
 $2,863.6
 $
 $
$2,183.5
 $2,511.4
 $
 $
Actual gain (loss) on plan assets193.3
 (93.6) 
 
Actual gain on plan assets362.4
 193.3
 
 
Employer contributions33.1
 36.5
 34.6
 48.3
45.3
 33.1
 39.6
 34.6
Plan participants’ contributions
 
 25.6
 24.9

 
 23.3
 25.6
Benefits paid(339.1) (295.1) (65.6) (76.5)(269.0) (339.1) (65.5) (65.6)
Annuity settlement(215.2) 
 
 

 (215.2) 
 
Medicare subsidy reimbursement received
 
 5.4
 3.3

 
 2.6
 5.4
Fair value of plan assets at end of year$2,183.5
 $2,511.4
 $
 $
$2,322.2
 $2,183.5
 $
 $
Funded status$(691.3) $(736.0) $(443.7) $(488.6)$(485.8) $(691.3) $(448.5) $(443.7)
              
Amounts recognized in the consolidated balance sheets: 
  
  
  
 
  
  
  
Current liabilities$(1.3) $(31.2) $(40.0) $(46.5)$(1.3) $(1.3) $(38.8) $(40.0)
Noncurrent liabilities(690.0) (704.8) (403.7) (442.1)(484.5) (690.0) (409.7) (403.7)
Total$(691.3) $(736.0) $(443.7) $(488.6)$(485.8) $(691.3) $(448.5) $(443.7)
              
Amounts recognized in accumulated other comprehensive loss, before taxes: 
  
  
  
 
  
  
  
Actuarial loss (gain)$209.7
 $323.5
 $(44.4) $(48.8)$77.6
 $209.7
 $(13.0) $(44.4)
Prior service cost (credit)27.9
 25.1
 (138.7) (199.0)23.2
 27.9
 (84.9) (138.7)
Total$237.6
 $348.6
 $(183.1) $(247.8)$100.8
 $237.6
 $(97.9) $(183.1)


The accumulated benefit obligation for all defined benefit pension plans was $2,826.6$2,767.1 and $3,222.0$2,826.6 at December 31, 20162017 and 2015.2016. All our defined benefit pension plans have an accumulated benefit obligation in excess of plan assets. The amounts included in current liabilities represent only the amounts of our unfunded pension and OPEB benefit plans that we expect to pay in the next year.

During the third quarter of 2016, we purchasedtransferred to a non-participating annuity contract with anhighly rated insurance company and transferred to it$210.3 of pension obligations of $87.0 for certainapproximately 10,000 retirees or their beneficiaries receivingin two separate transactions. As part of these transactions, we transferred a similar amount of pension payments. Late in the third quarter of 2016, we entered another agreement with the same insurance companytrust assets to purchase a second non-participating annuity contract to transfer obligations of $123.3 for additional retirees or their beneficiaries. In total, we irrevocably transferred the obligations for approximately
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10,000 retirees or their beneficiaries topurchase non-participating annuity contracts during the third quarter of 2016 that require the insurance company in exchange for a similar amount ofto pay the transferred pension trust assets, eliminating any future investment or mortality risk associated with thoseobligations to the pension participants. As a result of the second transfer of pension assets in October 2016, we recorded settlement losses of $25.0 in the fourth quarter of 2016 to recognize a portion of the unrealized actuarial loss associated with the transferred obligations. We also recorded a pension corridor charge of $78.4 in the fourth quarter of 2016 in connection with the October plan remeasurement. The corridor charge iswas primarily a result of a decline in discount rates since the beginning of the year, partially offset by better than expected returns on plan assets.

As a result of newWe revise our mortality tables issued in October 2016 byassumptions when the Society of Actuaries we revised ourissues new mortality assumptions, which decreased our pension and OPEB obligations. Thetables, typically in October. Over the past two years the new mortality assumptions decreased the assumed life expectancy of participants in our defined benefit plans, thereby decreasing the total expected benefit payments.payments and our pension and OPEB obligations. Included in the 2017 actuarial loss (gain) in the table above were actuarial gains of $14.3 and $2.9 related to the change in the mortality tables on pension benefits and OPEB, respectively. Included in the 2016 actuarial loss (gain) in the table above were actuarial gains of $33.8 and $4.5 related to the change in the mortality tables on pension benefits and OPEB, respectively. During 2015, we updated the major demographic assumptions we use to determine our pension and OPEB obligations after examining the recent experience among the plans’ participants. Included in the 2015 actuarial loss (gain) in the table above were actuarial gains of approximately $7.0 and $58.0 for the changes in demographic assumptions on pension benefits and other postretirement benefits, respectively.

Assumptions used to value benefit obligations and determine pension and OPEB expense (income) are presented below:
Pension Benefits Other BenefitsPension Benefits Other Benefits
2016 2015 2014 2016 2015 20142017 2016 2015 2017 2016 2015
Assumptions used to determine benefit obligations at December 31:                      
Discount rate3.93% 4.15% 3.82% 4.04% 4.22% 3.90%3.54% 3.93% 4.15% 3.59% 4.04% 4.22%
Rate of compensation increase4.00% 4.00% 4.00% 4.00% 4.00% 4.00%4.00% 4.00% 4.00% 4.00% 4.00% 4.00%
Subsequent year healthcare cost trend rate      7.00% 7.00% 7.00%      6.65% 7.00% 7.00%
Ultimate healthcare cost trend rate      4.50% 4.50% 4.50%      4.50% 4.50% 4.50%
Year ultimate healthcare cost trend rate begins      2025
 2024
 2020
      2025
 2025
 2024
                      
Assumptions used to determine pension and OPEB expense (income) for the year ended December 31:                      
Discount rate3.95% 3.82% 4.53% 4.22% 3.90% 4.48%3.93% 3.95% 3.82% 4.04% 4.22% 3.90%
Expected return on plan assets7.25% 7.25% 7.25%      7.25% 7.25% 7.25%      
Rate of compensation increase4.00% 4.00% 4.00% 4.00% 4.00% 4.00%4.00% 4.00% 4.00% 4.00% 4.00% 4.00%


We determine the discount rate at each remeasurement by finding a hypothetical portfolio of individual high-quality corporate bonds available at the measurement date with coupon and principal payments that could satisfy the plans’ expected future benefit payments that we use to calculate the projected benefit obligation. The discount rate is the single rate that is equivalent to the average yield on that hypothetical portfolio of bonds. We changed our assumption for future expected returns on pension plan assets to 7.00% from 7.25%, effective January 1, 2018.

Assumed healthcare cost trend rates generally have a significant effect on the amounts reported for healthcare plans. However, caps on the share of OPEB obligations that we pay limit the effect of changes in OPEB assumptions. As of December 31, 2016,2017, a one-percentage-point change in the assumed healthcare cost trend rates would have the following effects:
One Percentage PointOne Percentage Point
Increase DecreaseIncrease Decrease
Effect on total service cost and interest cost components$0.1
 $(0.1)$
 $
Effect on postretirement benefit obligation1.7
 (1.6)1.1
 (1.1)


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Estimated future benefit payments to beneficiaries are presented below:
Pension
Plans
 
Other
Benefits
 
Medicare
Subsidy
Pension
Plans
 
Other
Benefits
 
Medicare
Subsidy
2017$271.4
 $41.3
 $(1.3)
2018259.8
 39.3
 (1.3)$262.8
 $39.8
 $(1.0)
2019251.0
 37.8
 (1.4)254.6
 38.1
 (1.1)
2020239.4
 36.2
 (1.4)243.3
 36.3
 (1.1)
2021229.1
 34.7
 (1.5)231.3
 34.7
 (1.1)
2022 through 20261,037.1
 154.3
 (9.0)
2022227.0
 33.2
 (1.1)
2023 through 2027988.4
 145.8
 (6.3)

Plan Assets

Our investments in the master pension trust primarily include indexed and actively-managed funds. A fiduciary committee sets the target asset mix and monitors asset performance. We determine the master pension trust’s projected long-term rate of return based on the asset allocation, the trust’s investment policy statement and our long-term capital market return assumptions for the master trust.

We have developed an investment policy whichthat considers liquidity requirements, expected investment return and expected asset risk, as well as standard industry practices. The target asset allocation for the plan assets is 60%master pension trust at December 31, 2017 was 55% equity, 38%44% fixed income, and 2%1% cash. Equity investments consist of individual securities, equity mutual funds and common/collective trusts with equity investment strategies, which are diversified across multiple industry sectors, and company market capitalization within specificcapitalizations and geographical investment strategies. The equity mutual funds and common/collective trusts have no unfunded commitments or significant redemption restrictions. Fixed-income investments consist of individual securities and common/collective trusts, which invest primarily in investment-grade and high-yield corporate bonds and U.S. Treasury securities. The fixed-income investments are diversified by ratings, maturities, industries and other factors. Plan assets contain no significant concentrations of risk from individual securities or industry sectors. The planmaster pension trust has no direct investments in our common stock or fixed-income securities.

PlanMaster pension trust investments measured at fair value on a recurring basis at December 31, 20162017 and 20152016 are presented below, with certain assets presented by level within the fair value hierarchy. As a practical expedient, we estimate the value of common/collective trusts, equity mutual funds and certain other assets by using the net asset value (“NAV”) per share multiplied by the number of shares of the trust investment held as of the measurement date. If we have the ability to redeem our investment in the respective alternative investment at the NAV with no significant restrictions on the redemption at the consolidated balance sheet date, excluding equity mutual funds, we categorized the alternative investment as a reconciliation of pension investments reported in the fair value hierarchy to the master pension trust’s balance. The presentation of pension investments in 2015 has been conformed to the 2016 presentation. See Note 16 for more information on the determination of fair value.
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Quoted Prices
in Active
Markets for
Identical Assets
 
Significant Other
Observable Inputs
     
Quoted Prices
in Active
Markets for
Identical Assets
 
Significant Other
Observable Inputs
    
 (Level 1) (Level 2) Total (Level 1) (Level 2) Total
 2016 2015 2016 2015 2016 2015 2017 2016 2017 2016 2017 2016
Investments in fair value hierarchy                        
Equity investments:                        
U.S. securities $169.4
 $138.4
 $
 $
 $169.4
 $138.4
 $46.6
 $169.4
 $
 $
 $46.6
 $169.4
Global investments 
 
 191.0
 179.6
 191.0
 179.6
Global securities 
 
 327.9
 191.0
 327.9
 191.0
Fixed-income investments: 

 

 

 

 

 

 

 

 

 

 

 

Global investments 
 
 395.4
 389.7
 395.4
 389.7
U.S. high-yield corporate securities 
 
 0.4
 85.0
 0.4
 85.0
High-yield U.S. securities 
 
 111.8
 0.4
 111.8
 0.4
Other U.S. securities 
 
 524.6
 
 524.6
 
Global securities 
 
 
 395.4
 
 395.4
Other investments 
 
 28.9
 37.2
 28.9
 37.2
 
 
 30.6
 28.9
 30.6
 28.9
Total pension investments in fair value hierarchy $169.4
 $138.4
 $615.7
 $691.5
 $785.1
 $829.9
 $46.6
 $169.4
 $994.9
 $615.7
 $1,041.5
 $785.1
                        
Investments with fair values measured at net asset value  
  
  
  
  
  
  
  
  
  
  
  
Common/collective trusts:                        
U.S. equity securities (a)         728.8
 814.5
         194.6
 728.8
Global equity securities (b)         253.6
 261.5
         707.0
 381.4
Emerging market equity securities (c)         127.8
 103.9
U.S. corporate fixed-income securities (d)(c)         207.4
 415.8
         379.1
 207.4
U.S. Treasury securities and bonds (e)         80.4
 85.3
         
 80.4
Other         0.4
 0.5
         
 0.4
Total pension assets at fair value         $2,183.5
 $2,511.4
         $2,322.2
 $2,183.5

(a)Investments primarily in domestic equity securities, which may include common stocks, options and futures.
(b)Investments primarily in global equity securities, which may include common stocks, options and futures.
(c)Investments primarily in emerging market equity securities.
(d)Investments primarily in domestic fixed income investments, which may include investment-grade and high-yield corporate bonds, interest rate swaps, options and futures.
(e)Investments primarily in U.S. Treasury securities and bonds.

Periodic Benefit Costs

Components of pension and OPEB expense (income) for the years 2017, 2016 2015 and 20142015 are presented below:
Pension Benefits Other BenefitsPension Benefits Other Benefits
2016 2015 2014 2016 2015 20142017 2016 2015 2017 2016 2015
Components of pension and OPEB expense (income):                      
Service cost$3.0
 $2.2
 $1.7
 $4.9
 $7.1
 $4.9
$2.8
 $3.0
 $2.2
 $4.7
 $4.9
 $7.1
Interest cost120.4
 130.0
 146.0
 19.9
 22.5
 21.7
108.2
 120.4
 130.0
 17.3
 19.9
 22.5
Expected return on plan assets(167.1) (198.4) (202.8) 
 
 
(149.9) (167.1) (198.4) 
 
 
Amortization of prior service cost (credit)5.6
 4.4
 4.3
 (60.4) (64.6) (73.2)4.7
 5.6
 4.4
 (58.5) (60.4) (64.6)
Recognized net actuarial loss (gain):                      
Annual amortization29.2
 31.2
 2.5
 (4.3) 1.6
 (1.3)10.5
 29.2
 31.2
 (4.2) (4.3) 1.6
Corridor charge (credit)78.4
 144.3
 2.0
 (35.3) (13.1) 

 78.4
 144.3
 
 (35.3) (13.1)
Settlement loss29.9
 1.0
 0.2
 
 
 3.5

 29.9
 1.0
 
 
 
Pension and OPEB expense (income)$99.4
 $114.7
 $(46.1) $(75.2) $(46.5) $(44.4)$(23.7) $99.4
 $114.7
 $(40.7) $(75.2) $(46.5)


In December 2012, we reached a final settlement agreement (the “Zanesville Retiree Settlement”) of a class action filed on behalf of certain retirees from our Zanesville Works for our OPEB obligations to such retirees. We made the final payment to the Zanesville
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VEBA trust of $3.1 in 2015. Effective January 1, 2016, we transferred to the VEBA trust all OPEB obligations owed to the class members under our applicable health and welfare plans and have no further liability for OPEB benefits after December 31, 2015.

During 2016 2015 and 2014,2015, we performed remeasurements of an unfunded supplemental retirement plan and recognized settlement losses as a result of lump sum benefit payments made to retired participants.

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Pension and OPEB expense (income) for the defined benefit pension plans over the next year is expected to include amortization of $10.8$15.9 of the unrealized net loss and $4.7$3.8 from the prior service cost in accumulated other comprehensive loss. Pension and OPEB expense (income) for the other postretirement benefit plans over the next fiscal year is expected to include amortization of $4.2$1.3 of the unrealized net gain and $58.5$13.7 from the prior service credit in accumulated other comprehensive loss.

Defined Contribution Plans

All employees are eligible to participate in various defined contribution plans. Certain of these plans have features with matching contributions or other company contributions based on our financial results. Total expense from these plans was $16.1, $14.5$24.9, $23.1 and $12.1$18.8 in 2017, 2016 2015 and 2014.2015.

Multiemployer Pension Plans

We contribute to multiemployer pension plans according to collective bargaining agreements that cover certain union-represented employees. The following risks of participating in these multiemployer plans differ from single employer pension plans:
Employer contributions to a multiemployer plan may be used to provide benefits to employees of other participating employers.
If a participating employer stops contributing to a multiemployer plan, the remaining participating employers may need to assume the unfunded obligations of the plan.
If the multiemployer plan becomes significantly underfunded or is unable to pay its benefits, we may be required to contribute additional amounts in excess of the rate required by the collective bargaining agreements.
If we choose to stop participating in a multiemployer plan, we may be required to pay that plan an amount based on the underfunded status of the plan, referred to as a withdrawal liability.

Our participation in these multiemployer plans for the years ended December 31, 2017, 2016 2015 and 2014,2015, is presented below. We do not provide more than five percent of the total contributions to any multiemployer plan. Forms 5500 are not yet available for plan years ending in 2016.2017.
Pension Fund EIN/Pension Plan Number Pension Protection Act Zone Status (a) FIP/RP Status Pending/Implemented (b) Contributions Surcharge Imposed (c) Expiration Date of Collective Bargaining Agreement EIN/Pension Plan Number Pension Protection Act Zone Status (a) FIP/RP Status Pending/Implemented (b) Contributions Surcharge Imposed (c) Expiration Date of Collective Bargaining Agreement
 2016 2015 2016 2015 2014  2017 2016 2017 2016 2015 
Steelworkers Pension Trust 23-6648508/499 Green Green No $6.8
 $7.3
 $8.1
 No 3/31/2017 to 9/1/2018 (d) 23-6648508/499 Green Green No $6.3
 $6.8
 $7.3
 No 9/1/2018 to 3/31/2021 (d)
IAM National Pension Fund’s National Pension Plan 51-6031295/002 Green Green No 18.0
 16.0
 16.5
 No 3/15/2018 to 5/31/2019 (e) 51-6031295/002 Green Green No 18.4
 18.0
 16.0
 No 3/15/2018 to 5/31/2019 (e)
 $24.8
 $23.3
 $24.6
  $24.7
 $24.8
 $23.3
 
(a)The most recent Pension Protection Act zone status available in 20162017 and 20152016 is for each plan’s year-end at December 31, 20152016 and 2014.2015. The plan’s actuary certifies the zone status. Generally, plans in the red zone are less than 65% funded, plans in the yellow zone are between 65% and 80% funded, and plans in the green zone are at least 80% funded. The Steelworkers Pension Trust and IAM National Pension Fund’s National Pension Plan elected funding relief under section 431(b)(8) of the Internal Revenue Code and section 304(b)(8) of the Employment Retirement Income Security Act of 1974 (ERISA). This election allows those plans’ investment losses for the plan year ended December 31, 2008, to be amortized over 29 years for funding purposes.
(b)The “FIP/RP Status Pending/Implemented” column indicates plans for which a financial improvement plan (FIP) or a rehabilitation plan (RP) is either pending or has been implemented, as defined by ERISA.
(c)The surcharge represents an additional required contribution due as a result of the critical funding status of the plan.
(d)We are a party to three collective bargaining agreements (atat our Ashland Works, Mansfield Works and at the AK Tube Walbridge plant)plant that require contributions to the Steelworkers Pension Trust. The labor contract for approximately 310305 hourly employees at Mansfieldthe Ashland Works expires on March 31, 2017.September 1, 2018. The labor contract for approximately 90 hourly employees at the AK Tube Walbridge plant expires January 22, 2018.2021. The labor contract for approximately 725305 hourly employees at the AshlandMansfield Works expires on September 1, 2018.March 31, 2021.
(e)We are a party to three collective bargaining agreements (atat our Butler Works, Middletown Works and Zanesville Works)Works that require contributions to the IAM National Pension Fund’s National Pension Plan. The labor contract for approximately 1,2001,725 hourly employees at Middletown Works expires on March 15, 2018. The labor contract for approximately 1,155 hourly employees at Butler Works expires on April 1, 2019. The labor contract for approximately 115 hourly employees at Zanesville Works expires on May 31, 2019.

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Butler Works expires on April 1, 2019. The labor contract for approximately 1,715 hourly employees at Middletown Works expires on March 15, 2018. The labor contract for approximately 130 hourly employees at Zanesville Works expires on May 31, 2019.

NOTE 8 - Operating Leases
 

Rental expense was $43.1, $46.7 and $44.0 for 2017, 2016 and $35.7 for 2016, 2015 and 2014.2015. Obligations to make future minimum lease payments at December 31, 2016,2017, are presented below:
2017$13.9
201812.8
$18.2
20199.5
18.8
20207.5
18.1
20217.0
18.9
2022 and thereafter14.2
202216.6
2023 and thereafter90.2
Total minimum lease payments$64.9
$180.8


As a result of the termination of our pellet offtake agreement with Magnetation, we no longer need the rail cars that we leased for transporting iron ore pellets. We recorded a liability of $30.5 for these unused rail cars primarily in other long-term liabilities in the consolidated balance sheets as of December 31, 2016. The liability represents the present value of the remaining lease payments that we expect to pay over the remaining 12 years of the lease. We have excluded these payments from the table above.


NOTE 9 - Commitments
 

We purchase substantial portions of the principal raw materials required for our steel manufacturing operations under annual and multi-year agreements, some of which have minimum quantity requirements. We also use large volumes of natural gas, electricity and industrial gases in our steel manufacturing operations. We negotiate most of our purchases of chrome, coke, industrial gases, iron ore coke, chrome, industrial gases and a portion of our electricity under multi-year agreements. The iron ore agreements typically have a variable-price mechanism that adjusts the price of iron ore periodically, based on reference to an iron ore index and other market-based factors. We typically purchase coal under annual fixed-price agreements. We also purchase certain transportation services under multi-year contracts with minimum quantity requirements.

Commitments for future capital investments at December 31, 2016,2017, totaled approximately $42.5,$59.0, all of which we expect to incur in 2017.2018.

NOTE 10 - Environmental and Legal Contingencies
 

Environmental Contingencies

Domestic steel producers, including us, must follow stringent federal, state and local laws and regulations designed to protect human health and the environment. We have spent the following amounts over the past three years for environmental-related capital investments and environmental compliance:
2016 2015 20142017 2016 2015
Environmental-related capital investments$4.9
 $7.1
 $7.2
$6.8
 $4.9
 $7.1
Environmental compliance costs123.9
 133.2
 112.4
129.5
 123.9
 133.2


We and our predecessors have been involved in steel manufacturing and related operations since 1900. Although we believe our operating practices have been consistent with prevailing industry standards, hazardous materials may have been released at operating sites or third-party sites in the past, including operating sites that we no longer own. If we reasonably can, we have estimated potential remediation expenditures for those sites where future remediation efforts are probable based on identified conditions, regulatory requirements or contractual obligations arising from the sale of a business or facility. For sites involving government-required investigations, we typically make an estimate of potential remediation expenditures only after the investigation is complete and when we better understand the nature and scope of the remediation. In general, the material factors in these estimates include the costs associated with investigations, delineations, risk assessments, remedial work, governmental response and oversight, site monitoring,
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and preparation of reports to the appropriate environmental agencies. We have recorded the following liabilities for environmental matters on our consolidated balance sheets:
2016 20152017 2016
Accrued liabilities$7.3
 $5.6
$8.5
 $7.3
Other non-current liabilities39.9
 41.1
35.4
 39.9


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We cannot predict the ultimate costs for each site with certainty because of the evolving nature of the investigation and remediation process. Rather, to estimate the probable costs, we must make certain assumptions. The most significant of these assumptions is for the nature and scope of the work that will be necessary to investigate and remediate a particular site and the cost of that work. Other significant assumptions include the cleanup technology that will be used, whether and to what extent any other parties will participate in paying the investigation and remediation costs, reimbursement of past response and future oversight costs by governmental agencies, and the reaction of the governing environmental agencies to the proposed work plans. Costs for future investigation and remediation are not discounted to their present value. IfTo the extent that we have been able to reasonably estimate future liabilities, we do not believe that there is a reasonable possibility that we will incur a loss or losses that exceed the amounts we accrued for the environmental matters discussed below that would, either individually or in the aggregate, have a material adverse effect on our consolidated financial condition, results of operations or cash flows. However, since we recognize amounts in the consolidated financial statements in accordance with accounting principles generally accepted in the United States that exclude potential losses that are not probable or that may not be currently estimable, the ultimate costs of these environmental proceedings may be higher than the liabilities we currently have recorded in our consolidated financial statements.

Except as we expressly note below, we do not currently anticipate any material effect on our consolidated financial position, results of operations or cash flows as a result of compliance with current environmental regulations. Moreover, because all domestic steel producers operate under the same federal environmental regulations, we do not believe that we are more disadvantaged than our domestic competitors by our need to comply with these regulations. Some foreign competitors may benefit from less stringent environmental requirements in the countries where they produce, resulting in lower compliance costs for them and providing those foreign competitors with a cost advantage on their products.

According to the Resource Conservation and Recovery Act (“RCRA”), which governs the treatment, handling and disposal of hazardous waste, the United States Environmental Protection Agency (“EPA”) and authorized state environmental agencies may conduct inspections of RCRA-regulated facilities to identify areas where there have been releases of hazardous waste or hazardous constituents into the environment and may order the facilities to take corrective action to remediate such releases. Environmental regulators may inspect our major steelmaking facilities. While we cannot predict the future actions of these regulators, it is possible that they may identify conditions in future inspections of these facilities which they believe require corrective action.

Under authority from the Comprehensive Environmental Response, Compensation and Liability Act (“CERCLA”), the EPA and state environmental authorities have conducted site investigations at certain of our facilities and other third-party facilities, portions of which previously may have been used for disposal of materials that are currently regulated. The results of these investigations are still pending, and we could be directed to spend funds for remedial activities at the former disposal areas. Because of the uncertain status of these investigations, however, we cannot reliably predict whether or when such spending might be required or their magnitude.

As previously reported,noted, on July 27, 2001,April 29, 2002, we receivedentered a Special Notice Letter frommutually agreed-upon administrative order on consent with the EPA requesting that we agreepursuant to conductSection 122 of CERCLA to perform a Remedial Investigation/Feasibility Study (“RI/FS”) and enter an administrative order on consent pursuant to Section 122 of CERCLA regarding our formerthe Hamilton Plant site located in New Miami, Ohio. The Hamilton Plantplant ceased operations in 1990 and all of its former structures have been demolished and removed. Although we did not believe that a site-wide RI/FS was necessary or appropriate, in April 2002 we entered a mutually agreed-upon administrative order on consent to perform a RI/FS of the Hamilton Plant site.demolished. We submitted the investigation portion of the RI/FS, and we completed a supplemental study in 2014. We currently have accrued $0.7 for the remaining cost of the RI/FS. Until the RI/FS is complete, we cannot reliably estimate the additional costs, if any, we may incur for potentially required remediation of the site or when we may incur them.

As previously reported, on September 30, 1998, our predecessor, Armco Inc., received an order from the EPA under Section 3013 of RCRA requiring it to develop a plan for investigation of eight areas of our Mansfield Works that allegedly could be sources of contamination. A site investigation began in November 2000 and is continuing. We cannot reliably estimate at this time how long it will take to complete this site investigation. We currently have accrued approximately $1.1 for the projected cost of the study. Until the site investigation is complete, we cannot reliably estimate the additional costs, if any, we may incur for potentially required remediation of the site or when we may incur them.

As previously noted, on September 26, 2012, the EPA issued an order under Section 3013 of RCRA requiring us to develop a plan for investigation of four areas at our Ashland Works coke plant. We submitted a SamplingThe Ashland Works coke plant ceased operations in 2011 and Analysis Plan (“SAP”)all of its former structures have been demolished and removed. In 1981, we acquired the plant from Honeywell International Corporation (as successor to Allied Corporation), who had managed the EPA on
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October 25, 2012, and the EPA ultimately approved it on June 27, 2014. We completed Phase I of the SAP and submitted a report to the EPA on December 23, 2014.coking operations there for approximately 60 years. We cannot reliably estimate how long it will take to complete the site investigation. On March 10, 2016, the EPA invited us to participate in settlement discussions regarding an enforcement action. Settlement discussions between the parties are ongoing, though whether the parties will reach agreement and any such agreement’s terms are uncertain. We currently have accrued approximately $1.4 for the projected cost of the investigation and known remediation. Until the site investigation is complete, we cannot reliably estimate the costs, if any, we may incur for potential additional required remediation of the site or when we may incur them.

As previously reported, on July 15, 2009, we and the Pennsylvania Department of Environmental Protection (“PADEP”) entered a Consent Order and Agreement (the “Consent Order”) to resolve an alleged unpermitted discharge of wastewater from the closed
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Hillside Landfill at our former Ambridge Works. Under the terms of the Consent Order, we paid a penalty and also agreed to implement various corrective actions, including an investigation of the area where landfill activities occurred, submission of a plan to collect and treat surface waters and seep discharges, and upon approval from PADEP, implementation of that plan. We have accrued approximately $5.6 for the remedial work required under the approved plan and Consent Order. We submitted a National Pollution Discharge Elimination System (“NPDES”) permit application to move to the next work phase. We currently estimate that the remaining work will be completed in 2018,2019, though it may be delayed.

As previously reported, on June 29, 2000, the United States filed a complaint on behalf of the EPA against us in the U.S. District Court for the Southern District of Ohio, Case No. C-1-00530, alleging violations of the Clean Air Act, the Clean Water Act and RCRA at our Middletown Works. Subsequently, the State of Ohio, the Sierra Club and the National Resources Defense Council intervened. On May 15, 2006, the court entered a Consent Decree in Partial Resolution of Pending Claims (the “Consent Decree”). Under the Consent Decree, we agreed to undertake a comprehensive RCRA facility investigation at Middletown Works and, as appropriate, complete a corrective measures study. The Consent Decree required us to implement certain RCRA corrective action interim measures to address polychlorinated biphenyls (“PCBs”) in sediments and soils at Dicks Creek and certain other specified surface waters, adjacent floodplain areas and other previously identified geographic areas. We have completed the remedial activity at Dicks Creek, but continue to work on the RCRA facility investigation and certain interim measures. We have accrued approximately $14.6$13.6 for the cost of known work required under the Consent Decree for the RCRA facility investigation and remaining interim measures.

As previously reported, on May 12, 2014, the Michigan Department of Environmental Quality (“MDEQ”) issued to our Dearborn Works (then a part of Dearborn) an Air Permit to Install No. 182-05C (the “PTI”) to increase the emission limits for the blast furnace and other emission sources. The PTI was issued as a correction to a prior permit to install that did not include certain information during the prior permitting process. On July 10, 2014, the South Dearborn Environmental Improvement Association (“SDEIA”), Detroiters Working for Environmental Justice, Original United Citizens of Southwest Detroit and the Sierra Club filed a Claim of Appeal of the PTI in the State of Michigan, Wayne County Circuit, Case No. 14-008887-AA. Appellants and the MDEQ required the intervention of Severstal Dearborn, LLC (“Dearborn”) (now owned by us) in this action as an additional appellee. The appellants allege multiple deficiencies with the PTI and the permitting process. On October 9, 2014, the appellants filed a Motion for Peremptory Reversal of the MDEQ’s decision to issue the PTI. We believe that the MDEQ issued the PTI properly in compliance with applicable law and will vigorously contest this appeal. On October 17, 2014, we filed a motion to dismiss the appeal. Additionally, on December 15, 2014, we filed a motion to dismiss the appeal for lack of jurisdiction. At the conclusion of a hearing on all three motions on February 12, 2015, all three motions were denied. On July 12, 2016, the Michigan Court of Appeals denied our motion seeking to overturn the decision of the Circuit Court denying our motion to dismiss for lack of jurisdiction. On October 5, 2016, we filed an application with the Michigan Supreme Court for leave to appeal, seeking to overturn the decision of the Michigan Court of Appeals. Until the appeal is resolved, we cannot determine what the ultimate permit limits will be. Until the permit limits are determined and final, we cannot reliably estimate the costs if any, that we may incur, if the appeal causes the permit limits to change, nor can we determine if the costs will be materialany, or when we wouldmay incur them.

As previously reported, on August 21, 2014, the SDEIA filed a Complaint under the Michigan Environmental Protection Act (“MEPA”) in the State of Michigan, Wayne County Circuit Case No. 14-010875-CE. The plaintiffs allege that the air emissions from our Dearborn Works are impacting the air, water and other natural resources, as well as the public trust in such resources. The plaintiffs are requesting, among other requested relief, that the court assess and determine the sufficiency of the PTI’s limitations. On October 15, 2014, the court ordered a stay of the proceedings until a final order is issued in Wayne County Circuit Court Case No. 14-008887-AA (discussed above). When the proceedings resume, we will vigorously contest these claims. Until the claims in this Complaint are resolved, we cannot reliably estimate the costs we may incur, if any, or when we may incur them.

As previously reported, on April 27, 2000, MDEQ issued a RCRA Corrective Action Order No. 111-04-00-07E to Rouge Steel Company and Ford Motor Company for the property that includes our Dearborn Works. The Corrective Action Order has been amended five times. We are a party to the Corrective Action Order as the successor-in-interest to Dearborn, which was the successor-in-interest to Rouge Steel Company. The Corrective Action Order requires the site-wide investigation, and where appropriate, remediation of the facility. The site investigation and remediation is ongoing. We cannot reliably estimate at this time how long it will take to complete this site investigation and remediation. To date, Ford Motor Company has incurred most of the costs of the
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investigation and remediation due to its prior ownership of the steelmaking operations at Dearborn Works. Until the site investigation is complete, we cannot reliably estimate the additional costs we may incur, if any, for any potentially required remediation of the site or when we may incur them.

As previously reported, on August 29, 2013, the West Virginia Department of Environmental Protection (“WVDEP”) issued to Mountain State Carbon a renewal NPDES permit for wastewater discharge from the facility to the Ohio River. The new NPDES permit included numerous new, and more stringent, effluent limitations. On October 7, 2013, Mountain State Carbon appealed the permit to the Environmental Quality Board (“EQB”), Appeal No. 13-25-EQB. On February 10, 2016, we reached a partial settlement with WVDEP. On June 3, 2016, we received a favorable ruling from the EQB that required WVDEP to remove the new fecal coliform limits from the discharge permit. In addition, the EQB issued favorable rulings for the two other principal issues, pertaining to selenium and temperature. WVDEP elected not to appeal the EQB’s favorable rulings. Until the permit limits are determined and final, we cannot reliably estimate the costs we may incur, if any, or when we may incur them.

As previously reported, AK Steel received an order in October 2002 from the EPA under Section 3013 of RCRA requiring it to investigate several areas of Zanesville Works that allegedly could be sources of contamination. A site investigation began in 2003 and was approved by EPA in November 2012. On October 28, 2016, the EPA requested that we conduct a corrective measures study and implement these measures as necessary. Settlement discussions between the parties are ongoing, though whether the parties will reach agreement and any such agreement’s terms are uncertain. We currently have accrued $0.7 for the projected cost of the corrective measures study as well as a supplemental investigation. Until the study is complete, we cannot reliably estimate the costs, if any, we may incur for potential required remediation of the site or when we may incur them.
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On December 22, 2016 and February 7,October 10, 2017, we received Noticesa 60-day notice of Violations fromintent to file a citizen suit under the Southwest OhioClean Air Quality Agency on a pickling lineAct related to purported actions at our Middletown Works allegingfacility. The notice alleges a variety of violations of hydrochloric acid emission rates based on source testing events conducted between October 2016at the facility and January 2017. We investigatedcontends that potential plaintiffs, a private citizen and the Sierra Club, will seek civil penalties and injunctive relief if, within the succeeding 60 days, the parties are unable to agree upon suitable actions to resolve the claims. In the event the citizen’s suit is filed, we will vigorously contest these claims and implemented several corrective measures. Based on additional testing conducted in Januaryclaims. On December 4, 2017, we believe thatentered into a Consent Order with the pickling line is currentlyState of Ohio addressing claims made in compliance with emission limitations. Until the claims undernotice of intent to file a citizen suit. The Consent Order included injunctive relief measures at the Noticesfacility and a civil penalty of Violations are resolved, we cannot reliably estimate the costs we may incur, if any, or when we may incur them.less than $0.2.

In addition to the foregoing matters, we are or may be involved in proceedings with various regulatory authorities that may require us to pay fines, comply with more rigorous standards or other requirements or incur capital and operating expenses for environmental compliance. We believe that the ultimate disposition of the proceedings will not have, individually or in the aggregate, a material adverse effect on our consolidated financial condition, results of operations or cash flows.

Legal Contingencies

As previously reported, since 1990 we have been named as a defendant in numerous lawsuits alleging personal injury as a result of exposure to asbestos. The great majority of these lawsuits have been filed on behalf of people who claim to have been exposed to asbestos while visiting the premises of one of our current or former facilities. The majority of asbestos cases pending in which we are a defendant do not include a specific dollar claim for damages. In the cases that do include specific dollar claims for damages, the complaint typically includes a monetary claim for compensatory damages and a separate monetary claim in an equal amount for punitive damages, and does not attempt to allocate the total monetary claim among the various defendants.

The number of asbestos cases pending at December 31, 2016,2017, is presented below:
 Asbestos Cases Pending at
 December 31, 20162017
Cases with specific dollar claims for damages: 
Claims up to $0.2121135
Claims above $0.2 to $5.064
Claims above $5.0 to $15.02
Claims above $15.0 to $20.023
Total claims with specific dollar claims for damages (a)131142
Cases without a specific dollar claim for damages208194
Total asbestos cases pending339336
(a)Involve a total of 2,3312,244 plaintiffs and 17,22717,747 defendants

In each case, the amount described is per plaintiff against all of the defendants, collectively. Thus, it usually is not possible at the outset of a case to determine the specific dollar amount of a claim against us. In fact, it usually is not even possible at the outset to
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determine which of the plaintiffs actually will pursue a claim against us. Typically, that can only be determined through written interrogatories or other discovery after a case has been filed. Therefore, in a case involving multiple plaintiffs and multiple defendants, we initially only account for the lawsuit as one claim. After we have determined through discovery whether a particular plaintiff will pursue a claim, we make an appropriate adjustment to statistically account for that specific claim. It has been our experience that only a small percentage of asbestos plaintiffs ultimately identify us as a target defendant from whom they actually seek damages and most of these claims ultimately are either dismissed or settled for a small fraction of the damages initially claimed. Asbestos-related claims information in 2017, 2016 2015 and 2014,2015, is presented below:
 2016 2015 2014 2017 2016 2015
New Claims Filed 40
 52
 50
 58
 40
 52
Pending Claims Disposed Of 84
 68
 90
 61
 84
 68
Total Amount Paid in Settlements $0.9
 $1.9
 $0.7
 $1.2
 $0.9
 $1.9


Since the onset of asbestos claims against us in 1990, five asbestos claims against us have proceeded to trial in four separate cases. All five concluded with a verdict in our favor. We continue to vigorously defend the asbestos claims. Based upon present knowledge, and the factors above, we believe it is unlikely that the resolution in the aggregate of the asbestos claims against us will have a materially adverse effect on our consolidated results of operations, cash flows or financial condition. However, predictions about the outcome of pending litigation, particularly claims alleging asbestos exposure, are subject to substantial uncertainties. These uncertainties include (1) the significantly variable rate at which new claims may be filed, (2) the effect of bankruptcies of other companies currently or
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historically defending asbestos claims, (3) the litigation process from jurisdiction to jurisdiction and from case to case, (4) the type and severity of the disease each claimant alleged to suffer, and (5) the potential for enactment of legislation affecting asbestos litigation.

As previously reported, in September and October 2008 and again in July 2010, several companies filed purported class actions in the United States District Court for the Northern District of Illinois against nine steel manufacturers, including us. The case numbers for these actions are 08CV5214, 08CV5371, 08CV5468, 08CV5633, 08CV5700, 08CV5942, 08CV6197 and 10CV04236. On December 28, 2010, another action, case number 32,321, was filed in state court in the Circuit Court for Cocke County, Tennessee. The defendants removed the Tennessee case to federal court and in March 2012 it was transferred to the Northern District of Illinois. The plaintiffs in the various pending actions are companies that purport to have purchased steel products, directly or indirectly, from one or more of the defendants and they claim to file the actions on behalf of all persons and entities who purchased steel products for delivery or pickup in the United States from any of the named defendants at any time from at least as early as January 2005. The complaints allege that the defendant steel producers have conspired in violation of antitrust laws to restrict output and to fix, raise, stabilize and maintain artificially high prices for steel products in the United States. In March 2014, we reached an agreement with the direct purchaser plaintiffs to tentatively settle the claims asserted against us, subject to certain court approvals below. According to that settlement, we agreed to pay $5.8 to the plaintiff class of direct purchasers in exchange for the members of that class to completely release all claims. We continue to believe that the claims made against us lack any merit, but we elected to enter the settlement to avoid the ongoing expense of defending ourselves in this protracted and expensive antitrust litigation. We provided notice of the proposed settlement to members of the settlement class. After several class members received the notice, they elected to opt out of the class settlement. Following a fairness hearing, on October 21, 2014 the Court entered an order and judgment approving the settlement and dismissing all of the direct plaintiffs’ claims against us with prejudice as to the settlement class. In 2014, we recorded a charge for the amount of the tentative settlement with the direct purchaser plaintiff class and paid that amount into an escrow account, which has now been disbursed in accordance with the order that approved the settlement. At this time, we do not have adequate information availableOn March 3, 2017, the Court granted the defendants’ motion to determinedismiss the indirect plaintiffs’ amended complaint on the grounds that the plaintiffs lacked antitrust standing. On April 4, 2017, the indirect plaintiffs filed a loss is probable ormotion for reconsideration and the defendants filed an opposition to reliably or accurately estimatethat motion. On July 13, 2017, the potential loss, if any,Court denied the indirect plaintiffs’ motion for reconsideration. On September 15, 2017 the remaining indirect purchaser plaintiff class members and any direct purchaser class members that have opted outplaintiffs filed a notice of appeal with the class (hereinafter collectively referred to as the “Remaining Plaintiffs”).Seventh Circuit Court of Appeals. Because we have been unable to determine that a potential loss in this case for the Remaining Plaintiffsindirect plaintiffs is probable or estimable, we have not recorded an accrual for this matter. If our assumptions used to evaluate a probable or estimable loss for the Remaining Plaintiffsindirect plaintiffs prove to be incorrect or change, we may be required to record a charge for their claims.

As previously reported, on January 20, 2010, ArcelorMittal France and ArcelorMittal Atlantique et Lorraine (collectively “ArcelorMittal”) filed an action in the United States District Court for the District of Delaware, Case No. 10-050-SLR against us, Dearborn, and Wheeling-Nisshin Inc., whom Dearborn indemnified in this action. By virtue of our responsibility as a successor-in-interest to Dearborn and an indemnitor of Wheeling-Nisshin Inc,Inc., we now have complete responsibility for the defense of this action. The three named defendants are collectively referred to hereafter as “we” or “us”, though the precise claims against each separate defendant may vary. The complaint alleges that we are infringing the claims of U.S. Patent No. 6,296,805 (the “Patent”) in making pre-coated cold-rolled boron steel sheet and seeks injunctive relief and unspecified compensatory damages. We filed an answer denying ArcelorMittal’s claims and raised various affirmative defenses. We also filed counterclaims against ArcelorMittal for a declaratory judgment that we are not infringing the Patent and that the Patent is invalid. Subsequently, the trial court separated the issues of liability and damages. The case proceeded with a trial to a jury on the issue of liability during the week of January 15, 2011. The jury returned a verdict that we did not infringe the Patent and that the Patent was invalid. Judgment then was entered in our favor.
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ArcelorMittal filed an appeal with the United States Court of Appeals for the Federal Circuit. On November 30, 2012, the court of appeals issued a decision reversing certain findings related to claim construction and the validity of the Patent and remanded the case to the trial court for further proceedings. On January 30, 2013, ArcelorMittal filed a motion for rehearing with the court of appeals. On March 20, 2013, the court of appeals denied ArcelorMittal’s motion for rehearing. The case then was remanded to the trial court for further proceedings. On April 16, 2013, according to a petition previously filed by ArcelorMittal and ArcelorMittal USA LLC, the U.S. Patent and Trademark Office (“PTO”) reissued the Patent as U.S. Reissue Patent RE44,153 (the “Reissued Patent”). Also on April 16, 2013, ArcelorMittal filed a second action against us in the United States District Court for the District of Delaware, Case Nos. 1:13-cv-00685 and 1:13-cv-00686 (collectively the “Second Action”). The complaint filed in the Second Action alleges that we are infringing the claims of the Reissued Patent and seeks injunctive relief and unspecified compensatory damages. On April 23, 2013, we filed a motion to dismiss key elements of the complaint filed in the Second Action. In addition, the parties briefed related non-infringement and claims construction issues in the original action. On October 25, 2013, the district court granted summary judgment in our favor, confirming that our product does not infringe the original Patent or the Reissued Patent. The court further ruled that ArcelorMittal’s Reissued Patent was invalid due to ArcelorMittal’s deliberate violation of a statutory prohibition on broadening a patent through reissue more than two years after the original Patent was granted and that the original Patent had been surrendered when the Reissued Patent was issued and thus is no longer in effect. Final Judgment was entered on October 31, 2013. On November 6, 2013, ArcelorMittal filed a motion to clarify or, in the alternative, to alter or amend the October 31, 2013 judgment. We opposed the motion. On December 5, 2013, the court issued a memorandum and order denying the motion and entered final judgment in our favor, and against ArcelorMittal, specifically ruling that all claims of ArcelorMittal’s Reissued Patent are invalid as violative of 35 U.S.C. §251(d). On December 30, 2013, ArcelorMittal filed notices of appeal to the Federal Circuit Court of Appeals. The appeal has been
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fully briefed and the court of appeals held a hearing on November 4, 2014. On May 12, 2015, the Federal Circuit issued its decision affirming in part and reversing in part the trial court’s decision and remanding the case for further proceedings. The Federal Circuit ruled that 23 of the 25 claims of the Reissued Patent were improperly broadened and therefore invalid. However, the Federal Court found that the district court erred in invalidating the remaining two claims and remanded the case for further proceedings before the district court. Following the remand, ArcelorMittal filed a motion in the trial court for leave to amend the Second Action to assert additional patent infringement claims based on another, related patent that the PTO issued on June 10, 2014, No. RE44,940 (Second Reissue Patent). It also filed a motion to dismiss the original action on the grounds that it is now moot in light of the Court of Appeals’ last ruling. We opposed both of those motions. In addition, we filed separate motions for summary judgment in the original action on the grounds of non-infringement and invalidity. A hearing on all motions was held on October 27, 2015. On December 4, 2015, the district court issued an order granting our motion for summary judgment that neither of the remaining claims of the Reissued Patent are infringed and both are invalid as obvious. The court therefore entered final judgment in favor of the defendants in the original case. In the court’s order, the judge also granted ArcelorMittal’s motion to file a first amended complaint and ArcelorMittal did file an amended complaint in Case No. 1:13-cv-00685 (“685 Action”) alleging we are infringing the claims of the Second Reissue Patent, which we deny. On December 21, 2015, ArcelorMittal filed a notice of appeal from the district court’s December 4, 2015 final judgment. That appeal is fully briefedOn May 16, 2017, the Federal Circuit Court of Appeals affirmed the district court’s judgment of invalidity and oral argument was held on November 1, 2016.non-infringement of the reissued Patent. On June 14, 2017, ArcelorMittal filed a petition to the Federal Circuit for rehearing en banc of the May 16, 2017 decision. On August 14, 2017, the Federal Court of Appeals denied ArcelorMittal’s petition for rehearing en banc. On January 20, 2016, we filed a motion to dismiss the amended complaint in the 685 Action, or in the alternative, a motion to stay pending a resolution of the appeal in the original case. On April 19, 2016, the district court issued an order denying our motion and ordering limited discovery. Following discovery, on August 17, 2016, we filed a motion for summary judgment on the basis that the claims in the 685 Action are precluded by the judgment in the original case. On January 19, 2017, the district court issued an opinion granting summary judgment in our favor of the Company in the 685 Action on the grounds of non-infringement and also entered a final judgment on that basis. On February 14, 2017, ArcelorMittal filed a notice of appeal of the district court's order in the Federal Circuit Court of Appeals. The briefing of that appeal is completed and the parties are awaiting oral argument. We intend to continue to contest this matter vigorously. We have not made a determination that a loss is probable and we do not have adequate information to reliably or accurately estimate potential loss if ArcelorMittal prevails in its appeal in this dispute. Because we have been unable to determine that the potential loss in this case is probable or estimable, we have not recorded an accrual for this matter. If our assumptions used to evaluate whether a loss in this matter is either probable or estimable prove to be incorrect or change, we may be required to record a liability for an adverse outcome.

As previously reported, on June 13, 2013, Cliffs Sales Company (“Cliffs”) filed an action in the United States District Court for the Northern District of Ohio, Civil Action No. 1:13 cv 1308, against us pertaining to Dearborn Works. Cliffs claims that we breached a May 21, 2008, Agreement for Sale of Reclaimed Iron Units, as amended (the “Iron Unit Agreement”). Cliffs claims that we breached the Iron Unit Agreement by failing to purchase the required amount of pellets, chips and fines as allegedly required. We filed an answer denying the material allegations of the complaint and asserting several affirmative defenses. In January of 2014, the presiding judge ordered a stay of the proceedings. We intendIn January 2018, we and Cliffs signed an agreement under which Cliffs has agreed to contestvoluntarily dismiss this matter vigorously. At this time, we have not made a determination that a loss is probable and do not have adequate information to reliably or accurately estimate our potential loss if Cliffs prevails in this lawsuit. Because we have been unable to determine that a loss is probable or estimable, we have not recorded an accrual. If our assumptions used to evaluate whether a loss in this matter is either probable or estimable prove to be incorrect or change, we may be required to record a liability for an adverse outcome.

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Trade Cases

Corrosion-Resistant Steel

On June 3, 2015, we, along with five other domestic producers, filed anti-dumping (“AD”) and countervailing duty (“CVD”) petitions against imports of corrosion-resistant steel (“CORE”) from China, India, Italy, South Korea and Taiwan. The petitions alleged that unfairly traded imports of CORE from those five countries are causing material injury to the domestic industry. The United States Department of Commerce (“DOC”) initiated its investigations on June 24, 2015. On May 25, 2016, the Commerce Department announced its final affirmative determinations that (a) imports of CORE from China, India, Italy, South Korea and Taiwan are being sold at less-than-fair-value and should be subject to final AD duties, and that (b) imports of CORE from China, India, Italy and South Korea are benefiting from government subsidies and should be subject to CVD duties. After correcting certain ministerial errors, the Commerce Department calculated final dumping and subsidy margins as follows:
  Final Final
Country Corrosion-Resistant CVD Margins Corrosion-Resistant AD Margins
China 241.07% – 39.05% 209.97%
India 29.49% – 8.00% 4.43% – 3.05%
Italy 38.51% – 0.00% 92.12% – 12.63%
South Korea 1.19% – 0.00% 47.80% – 8.75%
Taiwan 0.00% 10.34%


On June 24, 2016, the International Trade Commission (“ITC”) determined that the domestic steel industry is materially injured by reason of imports of CORE from China, India, Italy, South Korea and Taiwan that are sold in the United States at less than fair value and that such products are subsidized by the governments of China, India, Italy and South Korea. As a result of the Commerce Department’s and the ITC’s final determinations, importers are required to post cash deposits with the U.S. government on imports of CORE from China, India, Italy, South Korea and Taiwan at the above CVD margins and AD margins. AD and CVD measures remain in effect for a minimum of five years.

Several of the named countries have filed appeals of the final determinations on CORE with the Court of International Trade (“CIT”). We and the other domestic producers intend to oppose all appeals vigorously.

On September 23, 2016, we and other domestic producers made a filing with the Commerce Department asserting that Chinese steel producers are attempting to circumvent the AD and CVD duties discussed above by transshipping Chinese steel through Vietnam for minor processing before importing CORE into the U.S. market. Our filing requests that the Commerce Department find that imports of Vietnamese CORE that originated in China be subjected to the same AD and CVD duties of shipments of CORE imported directly from China. On November 7, 2016, the Commerce Department made a favorable determination and announced that it would initiate an investigation into imports of Vietnamese CORE. We expect the Commerce Department to complete its investigation in the second or third quarter of 2017.

Cold-Rolled Steel

On July 28, 2015, we, along with four other domestic producers, filed AD petitions against imports of cold-rolled steel from Brazil, China, India, Japan, the Netherlands, Russia, South Korea and the United Kingdom, as well as CVD petitions against imports of cold-rolled steel from Brazil, China, India, Russia and South Korea. The petitions alleged that unfairly traded imports of cold-rolled steel from those eight countries are causing material injury to the domestic industry. On May 17, 2016, the Commerce Department announced its final affirmative determinations that (a) imports of cold-rolled steel from China and Japan are being sold at less-than-fair-value and should be subject to final AD duties and that (b) imports of cold-rolled steel from China are benefiting from government subsidies and should be subject to CVD duties. On July 21, 2016, the Commerce Department announced its final affirmative determinations that (a) imports of cold-rolled steel from Brazil, India, Russia, South Korea and the United Kingdom are being sold at less-than-fair-value and should be subject to final AD duties and that (b) imports of cold-rolled steel from Brazil, India, Russia and South Korea are benefiting from government subsidies and should be subject to CVD duties. After correcting certain ministerial errors, the Commerce Department calculated final dumping and subsidy margins as follows (the below chart does not include the margins determined for Russia because the ITC determined that the imports of cold-rolled steel are negligible, as further discussed below):
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  Final Final
Country Cold-Rolled CVD Margins Cold-Rolled AD Margins
Brazil 11.31% – 11.09% 35.43% – 19.58%
China 256.44% 265.79%
India 10.00% 7.60%
Japan NA 71.35%
South Korea 59.72% – 3.89% 34.33% – 6.32%
United Kingdom NA 25.17% – 5.40%


On June 22, 2016 and September 2, 2016, the ITC announced its final determinations that the domestic steel industry is materially injured by reason of imports of cold-rolled steel from Brazil, China, India, Japan, South Korea and the United Kingdom. The ITC determined that imports of cold-rolled steel from Russia that are sold in the United States at less-than-fair-value and subsidized by the government of Russia are negligible and terminated the investigations as to Russia. However, in October 2016, we and other domestic steel producers filed an appeal with the CIT appealing the ITC’s determination on Russian cold-rolled steel.

As a result of the Commerce Department’s and the ITC’s final determinations, importers are required to post cash deposits with the U.S. government on imports of cold-rolled steel from Brazil, China, India, Japan, South Korea and the United Kingdom at the above CVD margins and AD margins. AD and CVD measures remain in effect for a minimum of five years.

Several of the named countries have filed appeals of the final determinations on cold-rolled steel with the CIT. We and the other domestic producers intend to oppose all appeals vigorously.

On September 27, 2016, we and other domestic producers made a filing with the Commerce Department asserting that Chinese steel producers are attempting to circumvent the AD and CVD duties discussed above by transshipping Chinese steel through Vietnam for minor processing before importing cold-rolled steel into the U.S. market. Our filing requests that the Commerce Department find that imports of Vietnamese cold-rolled steel that originated in China be subjected to the same AD and CVD duties of shipments of cold-rolled steel imported directly from China. On November 7, 2016, the Commerce Department made a favorable determination and announced that it would initiate an investigation into Vietnamese cold-rolled steel. We expect the Commerce Department to complete its investigation in the second or third quarter of 2017.

Hot-Rolled Steel

On August 11, 2015, we, along with five other domestic producers, filed AD petitions against imports of hot-rolled steel from Australia, Brazil, Japan, the Netherlands, South Korea, Turkey and the United Kingdom, as well as CVD petitions against imports of hot-rolled steel from Brazil, South Korea and Turkey. The petitions alleged that unfairly traded imports of hot-rolled steel from those seven countries are causing material injury to the domestic industry. The Commerce Department initiated its investigations on September 1, 2015. On August 5, 2016, the Commerce Department announced its final affirmative determinations that (a) imports of hot-rolled steel from Australia, Brazil, Japan, the Netherlands, South Korea, Turkey and the United Kingdom are being sold at less-than-fair-value and should be subject to final AD duties and that (b) imports of hot-rolled steel from Brazil and South Korea are benefiting from government subsidies and should be subject to CVD duties. After correcting certain ministerial errors, the Commerce Department calculated final dumping and subsidy margins as follows:
FinalFinal
CountryHot-Rolled CVD MarginsHot-Rolled AD Margins
AustraliaNA29.58%
Brazil11.30% – 11.09%34.28% – 33.14%
JapanNA7.51% – 4.99%
NetherlandsNA3.73%
South Korea58.68% – 3.89%9.49% – 4.61%
TurkeyNA6.77% – 4.15%
United KingdomNA33.06%


On September 12, 2016 the ITC announced its final determinations that the domestic steel industry is materially injured by reason of imports of hot-rolled steel from Australia, Brazil, Japan, the Netherlands, South Korea, Turkey and the United Kingdom. As a result of the DOC’s and the ITC’s final determinations, importers are required to post cash deposits with the U.S. government on imports of
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hot-rolled steel from Australia, Brazil, Japan, the Netherlands, South Korea, Turkey and the United Kingdom at the above CVD margins and AD margins. AD and CVD measures remain in effect for a minimum of five years.

The final determinations on hot-rolled steel have been appealed to the CIT. We and the other domestic producers intend to oppose all appeals vigorously.

Stainless Steel

On February 12, 2016, we, along with three other domestic producers, filed AD and CVD petitions against imports of stainless steel from China. The petitions allege that unfairly traded imports of stainless steel from China are causing material injury to the domestic industry. The Commerce Department initiated its investigations on March 4, 2016. On March 25, 2016, the ITC made a unanimous preliminary determination of injury to the domestic industry caused by imports of stainless steel from China. On June 23, 2016, the Commerce Department preliminarily determined that Chinese producers significantly increased their shipments of products into the U.S. market before the Commerce Department’s preliminary determination of AD and CVD duties and, as such, that critical circumstances exist for imports of certain stainless steel from China. On July 12, 2016, the Commerce Department preliminarily determined that imports of stainless steel from China are benefiting from unfair government subsidies and should be subject to CVD duties. On September 12, 2016, the Commerce Department also preliminarily determined that imports of stainless steel from China are being sold at less-than-fair-value and should be subject to AD duties. The Commerce Department’s critical circumstances preliminary determination also allows the Commerce Department to impose CVD duties on certain stainless steel imports from China retroactively from April 19, 2016 and AD duties retroactively from 90 days prior to the publication of the Commerce Department’s preliminary determination in the Federal Register. On February 2, 2017, the Commerce Department announced its final affirmative determinations that (a) imports of stainless steel from China (a) are being sold at less-than-fair-value and should be subject to final AD duties, and (b) are benefiting from government subsidies and should be subject to CVD duties. The Commerce Department calculated final dumping and subsidy margins as follows:
FinalFinal
CountryStainless CVD MarginsStainless AD Margins
China190.71% – 75.60%76.64% – 63.86%


As a result of the Commerce Department’s final determinations and the ITC’s preliminary determinations, importers of stainless steel from China are required to post cash deposits with the U.S. government on imports of stainless steel from at the above CVD margins and AD margins. We expect the ITC to issue its final determination of injury by the end of the first quarter of 2017.

Grain-Oriented Electrical Steel

On September 18, 2013, we, along with another domestic producer and the United Steelworkers (collectively, the “Petitioners”), filed trade cases against imports of grain-oriented electrical steel (“GOES”) from seven countries. We filed AD petitions against China, the Czech Republic, Germany, Japan, Poland, Russia and South Korea and a CVD petition against China charging that unfairly traded imports of GOES from those seven countries are causing material injury to the domestic industry. The Commerce Department initiated the cases in October 2013. During May and July of 2014, the Commerce Department issued preliminary or final dumping determinations for imports of GOES from China, the Czech Republic, Germany, Japan, Poland, Russia and South Korea. However, in separate decisions announced in August and October of 2014, the ITC issued its final determination for imports of GOES from China, the Czech Republic, Germany, Japan, Poland, Russia and South Korea. In each of these decisions, the ITC determined in a 5-1 vote that the United States steel industry is neither materially injured nor threatened with material injury by those imports. These two ITC decisions nullified the Commerce Department’s assessment of dumping duties on GOES imports from each of the seven named countries, as well as a CVD determination for China. The Petitioners promptly filed appeals of the ITC’s decisions to the CIT. On November 23, 2016, the CIT rendered a decision denying the Petitioners’ appeal. We are continuing to assess various alternatives to ensure that foreign producers of GOES are required to comply with U.S. trade laws, including encouraging the vigorous enforcement of existing laws and regulations.prejudice.

Other Contingencies

In addition to the matters discussed above, there are various pending and potential claims against us and our subsidiaries involving product liability, commercial, employee benefits and other matters arising in the ordinary course of business. Because of the considerable uncertainties which exist for any claim, it is difficult to reliably or accurately estimate what would be the amount of a loss if a claimant prevails. If material assumptions or factual understandings we rely on to evaluate exposure for these contingencies prove to be inaccurate or otherwise change, we may be required to record a liability for an adverse outcome. If, however, we have reasonably evaluated potential future liabilities for all of these contingencies, including those described more specifically above, it is
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our opinion, unless we otherwise noted, that the ultimate liability from these contingencies, individually and in the aggregate, should not have a material effect on our consolidated financial position, results of operations or cash flows.

NOTE 11 - Stockholders’ Equity
 

Preferred Stock: There are 25,000,000 shares of preferred stock authorized; no shares are issued or outstanding.

Common Stock: Our common stockholders may receive dividends when and as declared by the Board of Directors out of funds legally available for distribution. The holders have one vote per share in respect of all matters and are not entitled to preemptive rights. On September 7, 2016, our stockholders approved an amendment of our Restated Certificate of Incorporation to increase the number of shares of common stock authorized for issuance from 300 million to 450 million shares.

In May 2016, AK Holding issued 59.8 million shares of common stock at $4.40 per share. We receivedshare for net proceeds of $249.5 after underwriting discounts and other fees. We used the net proceeds from the sale of the common stock to reduce our debt by repaying outstanding borrowings under our Credit Facility.

In November 2016, AK Holding issued an additional 74.8 million shares of common stock at $4.90
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$4.90 per share. We receivedshare for net proceeds of $351.0 after underwriting discounts and other fees. We used the net proceeds from the salesales of the common stock to reduce our debt by repaying outstanding borrowings under our Credit Facility and for general corporate purposes.

In 2014, AK Holding issued 40.3 million shares of common stock at $9.00 per share. Net proceeds were $345.3 after underwriting discounts and other fees. AK Holding used the net proceeds to pay a portion of the purchase price for the acquisition of Dearborn, to repay a portion of outstanding borrowings under the Credit Facility and for general corporate purposes.

Dividends: The instruments governing our outstanding senior debt allow dividend payments. However, our Credit Facility restricts dividend payments. Dividends are permitted if no default or event of default exists and (i) availability under the Credit Facility exceeds $337.520% of the lesser of the Credit Facility commitment or eligible collateral after advance rates or (ii) availability exceeds $262.515% of the lesser of the Credit Facility commitment or eligible collateral after advance rates and we meet a fixed charge coverage ratio of one to one as of the most recently ended fiscal quarter. At December 31, 2017, availability under the Credit Facility significantly exceeds these amounts. If we cannot meet either of these thresholds, annual dividends would be limited to $12.0 annually. Currently, the availability undergreater of $18.0 or 0.5% of consolidated total assets, with additional dividends permitted equal to the greater of $25.0 or 0.7% of consolidated total assets in aggregate over the life of the Credit Facility significantly exceeds $337.5. Although we have elected to suspend our dividend program, there currently are no covenants that would restrict our ability to declare and pay a dividend to our stockholders.Facility.

Share Repurchase Program: In October 2008, the Board of Directors authorized us to repurchase, from time to time, up to $150.0 of our outstanding common stock. We have not made any common stock repurchases under this program in the last three years. As of December 31, 2016,2017, we had remaining $125.6 for repurchase under the Board of Directors’ authorization.

NOTE 12 - Share-based Compensation
 

AK Holding’s Stock Incentive Plan (the “SIP”) permits us to grant nonqualified stock option, restricted stock, performance share and/or restricted stock unit (“RSUs”) awards to our Directors, officers and other employees. Stockholders have approved an aggregate maximum of 28 million shares issuable under the SIP through December 31, 2019, of which approximately 87 million shares are available for future grant as of December 31, 2016.2017.

Share-based compensation expense for the years ended December 31, 2017, 2016 2015 and 2014,2015, is presented below:
Share-based Compensation Expense 2016 2015 2014 2017 2016 2015
Stock options $1.0
 $1.7
 $1.7
 $2.1
 $1.0
 $1.7
Restricted stock 1.6
 3.2
 3.2
 2.9
 1.6
 3.2
Restricted stock units issued to Directors 1.3
 0.9
 1.1
 1.2
 1.3
 0.9
Performance shares 1.5
 1.9
 2.9
 1.5
 1.5
 1.9
Pre-tax share-based compensation expense $5.4
 $7.7
 $8.9
 $7.7
 $5.4
 $7.7


Stock Options

Stock options have a maximum term of ten years and holders may not exercise them earlier than six months after the grant date or another term the award agreement may specify. Stock options granted to officers and other employees vest and become exercisable in three equal installments on the first, second and third anniversaries of the grant date. The exercise price of each option must equal or
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exceed the market price of our common stock on the grant date. We have not and do not reprice stock options to lower the exercise price.

We use the Black-Scholes option valuation model to value the nonqualified stock options. We use historical data of stock option exercise behaviors to estimate the expected life that granted options will be outstanding. The risk-free interest rate is based on the Daily Treasury Yield Curve published by the U.S. Treasury on the grant date. The expected volatility is determined by using a blend of historical and implied volatility. The expected dividend yield isWe do not expect to pay dividends over the term of the options based on our historicalcurrent dividend payments.policy. We also estimate that option holders will forfeit 5% of the options.

The following weighted-average assumptions are used in the Black-Scholes option pricing model to estimate the fair value of granted options as of the grant date:
 2016 2015 2014 2017 2016 2015
Expected volatility 90.3% – 91.5% 67.6% – 75.9% 58.3% – 68.2% 61.5% – 64.0% 90.3% – 91.5% 67.6% – 75.9%
Weighted-average volatility 90.7% 69.4% 62.6% 62.5% 90.7% 69.4%
Expected term (in years) 3.3 – 6.7 3.1 – 6.6 3.0 – 6.5 3.3 – 6.5 3.3 – 6.7 3.1 – 6.6
Risk-free interest rate 1.2% – 1.8% 1.0% – 1.7% 0.9% – 2.3% 1.6% – 2.2% 1.2% – 1.8% 1.0% – 1.7%
Dividend yield —% —% —%
Weighted-average grant-date fair value per share of granted options $1.29 $2.36 $3.50 $5.33 $1.29 $2.36


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Option activity for the year ended December 31, 2016,2017, is presented below:
Stock OptionsStock Options Shares Weighted- Average Exercise Price Weighted- Average Remaining Contractual Life (in years) Aggregate Intrinsic ValueStock Options Shares Weighted- Average Exercise Price Weighted- Average Remaining Contractual Life (in years) Aggregate Intrinsic Value
Outstanding at December 31, 2015 3,303,992
 $9.26
    
Outstanding at December 31, 2016Outstanding at December 31, 2016 2,775,565
 $8.12
    
GrantedGranted 630,040
 1.83
  Granted 513,600
 9.78
  
ExercisedExercised (827,688) 6.68
  Exercised (58,999) 6.38
  
Forfeited and expiredForfeited and expired (330,779) 11.04
  Forfeited and expired (235,960) 17.66
  
Outstanding at December 31, 2016 2,775,565
 8.12
 5.3 $
Outstanding at December 31, 2017Outstanding at December 31, 2017 2,994,206
 7.69
 5.6 $4.8
             
Exercisable at December 31, 2016 1,430,960
 12.61
 3.7 
Exercisable at December 31, 2017Exercisable at December 31, 2017 1,796,958
 9.00
 4.0 2.4
             
Unvested at December 31, 2016 1,344,605
 3.35
 7.0 
Unvested at December 31, 2017Unvested at December 31, 2017 1,197,248
 5.81
 7.7 2.4
             
Unvested at December 31, 2016 expected to vest 1,277,375
 3.35
 7.0 
Unvested at December 31, 2017 expected to vestUnvested at December 31, 2017 expected to vest 1,137,386
 5.81
 7.7 2.3


The total intrinsic value of stock option awards that holders exercised during the year ended December 31, 2017 and 2016 was $0.2 and $1.4 and the intrinsic value was not material in 2015 or 2014.2015. Each exercised option’s intrinsic value is the quoted average of the reported high and low sales price on the exercise date. As of December 31, 2016,2017, total unrecognized compensation costs for non-vested stock options were $0.6,$1.1, which we expect to recognize over a weighted-average period of 1.51.8 years.

Restricted Stock

Restricted stock awards granted to officers and other employees ordinarily vest ratably on the first, second and third anniversaries of the grant. Non-vested restricted stock awards activity for the year ended December 31, 2016,2017, is presented below:
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Restricted Stock AwardsRestricted Shares Weighted- Average Grant Date Fair ValueRestricted Shares Weighted- Average Grant Date Fair Value
Outstanding at December 31, 2015599,315
 $4.54
Outstanding at December 31, 2016625,025
 $3.11
Granted617,460
 1.80
355,600
 9.78
Vested/restrictions lapsed(560,343) 3.21
(454,741) 5.70
Canceled(31,407) 2.89
(7,700) 5.10
Outstanding at December 31, 2016625,025
 3.11
Outstanding at December 31, 2017518,184
 5.38


The weighted-average grant date fair value of restricted stock awards granted during the years ended December 31, 2017, 2016 and 2015, was $9.78, $1.80 and 2014, was $1.80, $4.06 and $6.66 per share. The total intrinsic value of restricted stock awards that vested (i.e., restrictions lapsed) during the years ended December 31, 2017, 2016 and 2015, and 2014, was $4.1, $1.4 $2.9 and $2.9. As of December 31, 2016,2017, total unrecognized compensation costs for non-vested restricted stock awards granted under the SIP were $1.0,$1.5, which we expect to recognize over a weighted-average period of 1.51.2 years.

Restricted Stock Units

Restricted stock units (“RSUs”) represent equity-based compensation granted to Directors. RSU grants vest immediately, but we do not settle them (i.e., pay them)issue the underlying shares of stock) until one year after the grant date, unless a Director elects to defer the settlement. Directors have the optionsettlement to defer their RSU settlement six months after their Board service is terminated and alsoterminated. They may elect to take settlement in a single distribution or in annual installments up to fifteen years.

Performance Shares

Performance shares are granted to officers and other employees. They earn the awards by meeting performance measures over a three-year period. Though a target number of performance shares are awarded on the grant date, the total number of performance shares issued to the participant when they vest is based on two equally-rated metrics: (i) our share performance compared to a prescribed compounded annual growth rate and (ii) our total share return compared to Standardthe VanEck Vectors Steel ETF (Standard & Poor’s MidCap 400 index.index for grants prior to 2017).
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The following weighted-average assumptions are used in a Monte Carlo simulation model to estimate the fair value of performance shares granted:
 2016 2015 2014 2017 2016 2015
Company expected volatility 60.8% 56.4% 59.1% 68.0% 60.8% 56.4%
VanEck Vectors Steel ETF expected volatility 48.9% NA
 NA
S&P’s MidCap 400 index expected volatility 27.6% 27.0% 32.4% NA
 27.6% 27.0%
Risk-free interest rate 1.1% 0.9% 0.9% 1.5% 1.1% 0.9%
Dividend yield % % %
Weighted-average grant-date fair value per performance share granted $1.74
 $3.09
 $6.40
 $10.78
 $1.74
 $3.09


Non-vested performance share awards activity for the year ended December 31, 2016,2017, is presented below:
Performance Share AwardsPerformance Shares Weighted- Average Grant Date Fair ValuePerformance Shares Weighted- Average Grant Date Fair Value
Outstanding at December 31, 20151,004,294
 $4.40
Outstanding at December 31, 20161,017,856
 $2.48
Granted484,500
 1.74
263,600
 10.78
Earned(381,701) 6.40

 
Expired or forfeited(89,237) 3.35
(562,788) 3.10
Outstanding at December 31, 20161,017,856
 2.48
Outstanding at December 31, 2017718,668
 5.04


The total intrinsic value of performance share awards that were earned during the year ended December 31, 2016, was $4.5. As of December 31, 2016,2017, total unrecognized compensation costs for non-vested performance share awards granted under the SIP were $1.1,$2.0, which we expect to recognize over a weighted-average period of 1.51.9 years.

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NOTE 13 - Comprehensive Income (Loss)
 

Other comprehensive income (loss), net of tax, information is presented below:
 2016 2015 2014 2017 2016 2015
Foreign currency translation            
Balance at beginning of period $(2.1) $1.0
 $4.7
 $(3.6) $(2.1) $1.0
Other comprehensive income (loss)—foreign currency translation gain (loss) (1.5) (3.1) (3.7) 4.7
 (1.5) (3.1)
Balance at end of period $(3.6) $(2.1) $1.0
 $1.1
 $(3.6) $(2.1)
Cash flow hedges            
Balance at beginning of period $(34.0) $(32.2) $18.3
 $46.4
 $(34.0) $(32.2)
Other comprehensive income (loss):            
Gains (losses) arising in period 56.1
 (64.2) (51.6) (11.5) 56.1
 (64.2)
Income tax expense (benefit) 2.0
 (25.2) 
 (3.6) 2.0
 (25.2)
Gains (losses) arising in period, net of tax 54.1
 (39.0) (51.6) (7.9) 54.1
 (39.0)
Reclassification of losses (gains) to net income (loss) (a) 27.2
 61.4
 1.1
 (12.5) 27.2
 61.4
Income tax expense (c) 0.9
 24.2
 
Income tax (expense) benefit (c) (3.9) 0.9
 24.2
Net amount of reclassification of losses (gains) to net income (loss) 26.3
 37.2
 1.1
 (8.6) 26.3
 37.2
Total other comprehensive income (loss), net of tax 80.4
 (1.8) (50.5) (16.5) 80.4
 (1.8)
Balance at end of period $46.4
 $(34.0) $(32.2) $29.9
 $46.4
 $(34.0)
Unrealized holding gains on securities            
Balance at beginning of period $
 $0.4
 $0.4
 $
 $
 $0.4
Reclassification of gains (losses) to net income (loss)—income tax benefit (c) 
 0.4
 
 
 
 0.4
Total other comprehensive income (loss), net of tax 
 (0.4) 
 
 
 (0.4)
Balance at end of period $
 $
 $0.4
 $
 $
 $
Pension and OPEB plans            
Balance at beginning of period $(151.1) $(173.6) $300.0
 $(106.3) $(151.1) $(173.6)
Other comprehensive income (loss):            
Prior service credit (cost) arising in period (8.3) (7.7) 10.9
 4.7
 (8.3) (7.7)
Gains (losses) arising in period 11.6
 (60.8) (422.5) 94.2
 11.6
 (60.8)
Subtotal 3.3
 (68.5) (411.6) 98.9
 3.3
 (68.5)
Income tax expense (benefit) (c) 0.1
 (26.0) 
 31.0
 0.1
 (26.0)
Gains (losses) arising in period, net of tax 3.2
 (42.5) (411.6) 67.9
 3.2
 (42.5)
Reclassification to net income (loss):            
Prior service costs (credits) (b) (54.8) (60.2) (68.9) (53.8) (54.8) (60.2)
Actuarial (gains) losses (b) 97.9
 165.0
 6.9
 6.3
 97.9
 165.0
Subtotal 43.1
 104.8
 (62.0) (47.5) 43.1
 104.8
Income tax (expense) benefit (c) 1.5
 39.8
 
 (14.9) 1.5
 39.8
Amount of reclassification to net income (loss), net of tax 41.6
 65.0
 (62.0) (32.6) 41.6
 65.0
Total other comprehensive income (loss), net of tax 44.8
 22.5
 (473.6) 35.3
 44.8
 22.5
Balance at end of period $(106.3) $(151.1) $(173.6) $(71.0) $(106.3) $(151.1)


(a)Included in cost of products sold
(b)Included in pension and OPEB expense (income)
(c)Included in income tax expense (benefit)

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NOTE 14 - Earnings per Share
 

Reconciliation of the numerators and denominators for basic and diluted EPS computations is presented below:
 2016 2015 2014 2017 2016 2015
Net income (loss) attributable to AK Steel Holding Corporation $(7.8) $(509.0) $(96.9) $6.2
 $(7.8) $(509.0)
Less: distributed earnings to common stockholders and holders of certain stock compensation awards 
 
 
 
 
 
Undistributed earnings (loss) $(7.8) $(509.0) $(96.9) $6.2
 $(7.8) $(509.0)
            
Common stockholders earnings—basic and diluted:            
Distributed earnings to common stockholders $
 $
 $
 $
 $
 $
Undistributed earnings (loss) to common stockholders (7.7) (507.3) (96.6) 6.2
 (7.7) (507.3)
Common stockholders earnings (loss)—basic and diluted $(7.7) $(507.3) $(96.6) $6.2
 $(7.7) $(507.3)
            
Common shares outstanding (weighted-average shares in millions):            
Common shares outstanding for basic earnings per share 230.0
 177.2
 148.1
 314.3
 230.0
 177.2
Effect of exchangeable debt 
 
 
Effect of Exchangeable Notes 4.5
 
 
Effect of dilutive stock-based compensation 
 
 
 0.9
 
 
Common shares outstanding for diluted earnings per share 230.0
 177.2
 148.1
 319.7
 230.0
 177.2
            
Basic and diluted earnings per share:            
Distributed earnings $
 $
 $
 $
 $
 $
Undistributed earnings (loss) (0.03) (2.86) (0.65) 0.02
 (0.03) (2.86)
Basic and diluted earnings (loss) per share $(0.03) $(2.86) $(0.65) $0.02
 $(0.03) $(2.86)
            
Potentially issuable common shares (in millions) excluded from earnings per share calculation due to anti-dilutive effect 3.0
 3.6
 9.7
 1.4
 3.0
 3.6


NOTE 15 - Variable Interest Entities
 

SunCoke Middletown

We purchase all the coke and electrical power generated from SunCoke Middletown’s plant under long-term supply agreements. SunCoke Middletown is a variable interest entity because we have committed to purchase all the expected production from the facility through at least 2031 and we are the primary beneficiary. Therefore, we consolidate SunCoke Middletown’s financial results with our financial results, even though we have no ownership interest in SunCoke Middletown. SunCoke Middletown had income before income taxes of $61.7, $66.0 $62.6 and $63.0$62.6 for the years ended December 31, 2017, 2016 2015 and 20142015 that was included in our consolidated income (loss) before income taxes.

Vicksmetal/Armco Associates

We own a 50% interest in Vicksmetal/Armco Associates (“VAA”), a joint venture with Vicksmetal Company, which is owned by Sumitomo Corporation. VAA slits electrical steel primarily for AK Steel, though also for third parties. VAA is a variable interest entity and we are the primary beneficiary. Therefore, we consolidate VAA’s financial results with our financial results.

NOTE 16 - Fair Value Measurements
 

We measure certain assets and liabilities at fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., the “exit price”) in an orderly transaction between market participants at the measurement date. In determining fair value, we use various valuation approaches. The hierarchy of those valuation approaches is in three levels based on
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the reliability of inputs. Assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. Below is a summary of the hierarchy levels:

Level 1 inputs are quoted prices in active markets for identical assets or liabilities that we have the ability to access at the measurement date.

Level 2 inputs are inputs, other than quoted prices, that are directly or indirectly observable for the asset or liability. Level 2 inputs include model-generated values that rely on inputs either directly observed or readily-derived from available market data sources, such as Bloomberg or other news and data vendors. They include quoted prices for similar assets or liabilities in active markets, inputs other than quoted prices that are observable for the asset or liability (e.g., interest rates and yield curves observable at commonly quoted intervals or current market) and contractual prices for the underlying financial instrument, as well as other relevant economic factors. As a practical expedient, we estimate the value of money market mutual funds by using a $1.00 per share multiplied by the number of shares in the fund as of the measurement date. We generate fair values for our commodity derivative contracts and foreign currency forward contracts from observable futures prices for the respective commodity or currency, from sources such as the New York Mercantile Exchange (NYMEX) or the London Metal Exchange (LME). In cases where the derivative is an option contract (including caps, floors and collars), we adjust our valuations to reflect the counterparty’s valuation assumptions. After validating that the counterparty’s assumptions for implied volatilities reflect independent source’s assumptions, we discount these model-generated future values with discount factors that reflect the counterparty’s credit quality. We apply different discount rates to different contracts since the maturities and counterparties differ. As of December 31, 2016,2017, a spread over benchmark rates of less than 0.8%1.8% was used for derivatives valued as assets and less than 4.0%2.6% for derivatives valued as liabilities. We have estimated the fair value of long-term debt based upon quoted market prices for the same or similar issues or on the current interest rates available to us for debt on similar terms and with similar maturities.

Level 3 inputs are unobservable inputs for the asset or liability. Unobservable inputs are used to measure fair value to the extent that observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at the measurement date. This level of categorization is not applicable to our valuations on a normal recurring basis.

Assets and liabilities measured at fair value on a recurring basis are presented below:
2016 20152017 2016
Level 1 Level 2 Total Level 1 Level 2 TotalLevel 1 Level 2 Total Level 1 Level 2 Total
Assets measured at fair value                      
Cash and cash equivalents (a)$48.2
 $125.0
 $173.2
 $56.6
 $
 $56.6
$38.0
 $
 $38.0
 $48.2
 $125.0
 $173.2
Other current assets:                      
Foreign exchange contracts
 0.1
 0.1
 
 1.1
 1.1

 0.2
 0.2
 
 0.1
 0.1
Commodity hedge contracts
 47.0
 47.0
 
 0.5
 0.5

 35.2
 35.2
 
 47.0
 47.0
Other non-current assets—commodity hedge contracts
 15.3
 15.3
 
 0.3
 0.3
Other non-current assets:           
Foreign exchange contracts
 1.7
 1.7
 
 
 
Commodity hedge contracts
 10.6
 10.6
 
 15.3
 15.3
Assets measured at fair value$48.2
 $187.4
 $235.6
 $56.6
 $1.9
 $58.5
$38.0
 $47.7
 $85.7
 $48.2
 $187.4
 $235.6
                      
Liabilities measured at fair value                      
Accrued liabilities—commodity hedge contracts$
 $(1.8) $(1.8) $
 $(41.2) $(41.2)
Accrued liabilities:           
Foreign exchange contracts$
 $(0.3) $(0.3) $
 $
 $
Commodity hedge contracts
 (4.9) (4.9) 
 (1.8) (1.8)
Other non-current liabilities—commodity hedge contracts
 (0.6) (0.6) 
 (9.5) (9.5)
 (0.5) (0.5) 
 (0.6) (0.6)
Liabilities measured at fair value$
 $(2.4) $(2.4) $
 $(50.7) $(50.7)$
 $(5.7) $(5.7) $
 $(2.4) $(2.4)
                   ��  
Liabilities measured at other than fair value                      
Long-term debt, including current portions:                      
Fair value$
 $(2,123.2) $(2,123.2) $
 $(1,573.3) $(1,573.3)$
 $(2,273.4) $(2,273.4) $
 $(2,123.2) $(2,123.2)
Carrying amount
 (1,816.6) (1,816.6) 
 (2,354.1) (2,354.1)
 (2,110.1) (2,110.1) 
 (1,816.6) (1,816.6)


(a)Level 2 assets include money market mutual funds invested in U.S. Treasury obligations.

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See Note 7 for information on the fair value of pension plan assets. The carrying amounts of our other financial instruments do not differ materially from their estimated fair values at December 31, 20162017 and 2015.2016.

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NOTE 17 - Derivative Instruments and Hedging Activities
 

Exchange rate fluctuations affect a portion of intercompany receivablesrevenues and operating costs that are denominated in foreign currencies, and we use forward currency and currency option contracts to reduce our exposure to certain of these currency price fluctuations. These contractsContracts that sell euros have not been designated as hedges for accounting purposes and gains or losses are reported in earnings on a current basisimmediately in other income (expense). Contracts that purchase Canadian dollars are designated as hedges for accounting purposes, which requires us to record the effective gains and losses for the derivatives in accumulated other comprehensive income (loss) and reclassify them into cost of products sold in the same period we recognize the associated underlying operating costs. We recognize gains and losses on these designated derivatives immediately in cost of products sold if we calculate hedge ineffectiveness.

We are exposed to fluctuations in market prices of raw materials and energy sources, as well as from the effect of market prices on the sale of certain commodity steel (hot roll carbon steel coils).sources. We may use cash-settled commodity price swaps and options (including collars) to hedge the market risk associated with the purchase of certain of our raw materials and energy requirements and the sale of hot roll carbon steel coils.requirements. For input commodities, these derivatives are typically used for a portion of our electricity, iron ore, natural gas, nickel iron ore, aluminum,and zinc and electricity requirements. Our hedging strategy is to reduce the effect on earnings from the price volatility of these various commodity exposures. Independent of any hedging activities, price changes in any of these commodity markets could negatively affect operating costs or selling prices.costs.

All commodity derivatives are recognized as an asset or liability at fair value. We record the effective gains and losses for commodity derivatives designated as cash flow hedges of forecasted purchases of raw materials and energy sources in accumulated other comprehensive income (loss) and reclassify them into cost of products sold in the same period we recognize earnings for the associated underlying transaction. We recognize gains and losses on these designated derivatives arising from eitherimmediately in cost of products sold for calculated hedge ineffectiveness or fromand for components excluded from the assessment of effectiveness in current earnings under cost of products sold.effectiveness. We record all gains or losses from commodity derivatives for which hedge accounting treatment has not been elected to earnings on a current basisimmediately in net sales or cost of products sold.

We have no collateral todeposited with counterparties under collateral funding arrangements as of December 31, 2016.2017.

Outstanding commodity price swaps and options and forward foreign exchange and currency option contracts as of December 31, 20162017 and 2015,2016, are presented below:
Commodity 2016 2015
Nickel (in lbs) 
 164,800
Natural gas (in MMBTUs) 43,865,000
 36,972,500
Zinc (in lbs) 58,750,000
 54,173,800
Iron ore (in metric tons) 2,555,000
 2,795,000
Electricity (in MWHs) 1,578,821
 1,386,400
Foreign exchange contracts (in euros) 5,000,000
 55,500,000


The fair value of derivative instruments as of December 31, 2016 and 2015, is presented below:
Asset (liability) 2016 2015
Derivatives designated as hedging instruments:    
Other current assets—commodity contracts $18.5
 $0.3
Other non-current assets—commodity contracts 5.2
 0.3
Accrued liabilities—commodity contracts (1.8) (40.9)
Other non-current liabilities—commodity contracts (0.1) (9.5)
     
Derivatives not designated as hedging instruments:    
Other current assets:    
Foreign exchange contracts 0.1
 1.1
Commodity contracts 28.5
 0.2
Other noncurrent assets—commodity contracts 10.1
 
Accrued liabilities—commodity contracts 
 (0.3)
Other noncurrent liabilities—commodity contracts (0.5) 
Hedge Contracts 2017 2016
Commodity contracts:    
Nickel (in lbs) 500,000
 
Natural gas (in MMBTUs) 41,338,000
 43,865,000
Zinc (in lbs) 50,350,000
 58,750,000
Iron ore (in metric tons) 2,340,000
 2,555,000
Electricity (in MWHs) 1,553,000
 1,578,821
Foreign exchange contracts:    
Euros 26,000,000
 5,000,000
Canadian dollars C$148,080,000
 C$


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The fair value of derivative instruments as of December 31, 2017 and 2016, is presented below:
Asset (liability) 2017 2016
Derivatives designated as hedging instruments:    
Other current assets:    
Foreign exchange contracts $0.2
 $
Commodity contracts 9.0
 18.5
Other non-current assets:    
Foreign exchange contracts 1.7
 
Commodity contracts 2.3
 5.2
Other current liabilities:    
Foreign exchange contracts (0.2) 
Commodity contracts (4.6) (1.8)
Other non-current liabilities—commodity contracts (0.5) (0.1)
     
Derivatives not designated as hedging instruments:    
Other current assets:    
Foreign exchange contracts 
 0.1
Commodity contracts 26.2
 28.5
Other non-current assets—commodity contracts 8.3
 10.1
Accrued liabilities:    
Foreign exchange contracts (0.1) 
Commodity contracts (0.3) 
Other non-current liabilities—commodity contracts 
 (0.5)


Gains (losses) on derivative instruments for the years ended December 31, 2017, 2016 2015 and 2014,2015, are presented below:
Gain (loss) 2016 2015 2014 2017 2016 2015
Derivatives in cash flow hedging relationships—      
Derivatives designated as cash flow hedges—      
Commodity contracts:            
Reclassified from accumulated other comprehensive income into cost of products sold (effective portion) $(27.2) $(61.4) $(1.1) $12.5
 $(27.2) $(61.4)
Recorded in cost of products sold (ineffective portion and amount excluded from effectiveness testing) (13.3) (23.6) (0.8) 0.7
 (13.3) (23.6)
            
Derivatives not designated as hedging instruments:            
Foreign exchange contracts—recognized in other income (expense) (0.9) (0.1) 1.9
 (1.6) (0.9) (0.1)
Commodity contracts:            
Recognized in net sales 
 2.2
 (5.1) 
 
 2.2
Recognized in cost of products sold 38.6
 (2.0) (35.0) 31.6
 38.6
 (2.0)


The termination of the pellet offtake agreement with Magnetation and entry into the Settlement Agreement will affectaffects the future accounting treatment of certainour iron ore derivatives contracts that we entered before the termination of the pellet offtake agreement and entry into the Settlement Agreement.derivative contracts. We previously designated certain derivative contracts as cash flow hedges on a portion of the Magnetation iron ore purchases. As a result of the entry into the Settlement Agreement, we discontinued designating those derivatives contracts as hedging instruments, which potentially increases the volatility of our results of operations. This volatility does not affect the ultimate gains or losses on the derivative contracts we will recognize in the financial statements, but only the timing of recognition. DiscontinuingDerivative contracts not designated as hedging instruments requiresrequire us to immediately recognize changes in the fair value of the derivative contracts in cost of products sold in the table above when the change in fair value occurs, instead of when we recognize costs for the underlying purchases of iron ore. Therefore, we reclassified $1.7
Table of gains on unsettled iron ore derivatives from accumulated other comprehensive income into cost of products sold in the third quarter of 2016 when we entered the Settlement Agreement, and we recorded $45.6 of mark-to-market gains in 2016 for unsettled iron ore derivatives.Contents


Gains (losses) before tax expected to be reclassified into cost of products sold within the next twelve months for our existing commodity contracts that qualify for hedge accounting, as well as the period over which we are hedging our exposure to the volatility in future cash flows, are presented below:
Commodity Hedge Settlement Dates Gains (losses)
Hedge Settlement Dates Gains (losses)
Natural gasJanuary 2017 to December 2018 $19.9
January 2018 to December 2019 $(1.2)
ElectricityJanuary 2017 to December 2018 (0.3)January 2018 to December 2019 1.2
ZincJanuary 2017 to December 2018 4.8
January 2018 to December 2019 8.4
Canadian dollarsJanuary 2018 to December 2020 (0.8)


NOTE 18 - Supplementary Cash Flow Information
 

Net cash paid (received) during the period for interest, net of capitalized interest, and income taxes are presented below:
 2016 2015 2014 2017 2016 2015
Net cash paid (received) during the period for:            
Interest, net of capitalized interest $137.1
 $161.3
 $121.9
 $130.5
 $137.1
 $161.3
Income taxes (2.6) 0.7
 (0.3) 0.1
 (2.6) 0.7


Included in net cash flows from operations was cash provided by SunCoke Middletown of $77.1, $83.3 $87.4 and $66.4$87.4 for the years ended December 31, 2017, 2016 2015 and 2014.2015. Consolidated cash and cash equivalents at December 31, 2016,2017, and 2015,2016, include SunCoke Middletown’s cash and cash equivalents of $5.0$0.1 and $7.6.$5.0. SunCoke Middletown’s cash and cash equivalents have no compensating balance arrangements or legal restrictions, but is not available for our use.

We had capital investments during the years ended December 31, 2017, 2016 2015 and 2014,2015, that had not been paid as of the end of the respective period. These amounts are included in accounts payable and accrued liabilities and have been excluded from the consolidated statements of cash flows until paid. We have included our new leased Research and Innovation Center in property, plant and equipment and as a capital lease obligation in the consolidated balance sheets as of December 31, 2016,during its construction, which representswas completed in early 2017 and represented a non-
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cashnon-cash transaction for us. In October 2017, we acquired the Research and Innovation Center capital lease with cash from our Credit Facility, effectively settling the obligation. We also granted restricted stock to certain employees and restricted stock units to directors under the SIP. Non-cash investing and financing activities for the years ended December 31, 2017, 2016 2015 and 2014,2015, are presented below:
 2016 2015 2014 2017 2016 2015
Capital investments $33.2
 $34.4
 $29.5
 $37.3
 $33.2
 $34.4
Research and Innovation Center capital lease 25.2
 
 
 1.1
 25.2
 
Issuance of restricted stock and restricted stock units 2.3
 4.1
 4.5
 4.6
 2.3
 4.1


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NOTE 19 - Quarterly Information (Unaudited)
 

Earnings per share for each quarter and the year are calculated individually and may not sum to the total for the year.
20162017
First
Quarter
 
Second
Quarter
 
Third
Quarter
 
Fourth
Quarter
 Year
First
Quarter
 
Second
Quarter
 
Third
Quarter
 
Fourth
Quarter
 Year
Net sales$1,518.8
 $1,492.2
 $1,452.9
 $1,418.6
 $5,882.5
$1,533.4
 $1,557.2
 $1,494.3
 $1,495.6
 $6,080.5
Operating profit (loss)48.0
 62.6
 130.8
 (11.2) 230.2
112.5
 109.5
 37.8
 (39.8) 220.0
Net income (loss) attributable to AK Holding(13.6) 17.3
 50.9
 (62.4) (7.8)62.5
 61.2
 (5.8) (111.7) 6.2
Basic and diluted earnings (loss) per share$(0.08) $0.08
 $0.21
 $(0.22) $(0.03)
Basic earnings (loss) per share$0.20
 $0.19
 $(0.02) $(0.36) $0.02
Diluted earnings (loss) per share0.19
 0.19
 (0.02) (0.36) 0.02
                  
20152016
First
Quarter
 
Second
Quarter
 
Third
Quarter
 
Fourth
Quarter
 Year
First
Quarter
 
Second
Quarter
 
Third
Quarter
 
Fourth
Quarter
 Year
Net sales$1,750.9
 $1,689.4
 $1,709.9
 $1,542.7
 $6,692.9
$1,518.8
 $1,492.2
 $1,452.9
 $1,418.6
 $5,882.5
Operating profit (loss)33.8
 7.1
 80.2
 (34.4) 86.7
48.0
 62.6
 130.8
 (11.2) 230.2
Net income (loss) attributable to AK Holding(306.3) (64.0) 6.7
 (145.4) (509.0)(13.6) 17.3
 50.9
 (62.4) (7.8)
Basic and diluted earnings (loss) per share$(1.72) $(0.36) $0.04
 $(0.82) $(2.86)$(0.08) $0.08
 $0.21
 $(0.22) $(0.03)


Included in net income attributable to AK Holding in the fourth quarter and full year of 2017 were a credit of $19.3 to reduce a transportation liability, a non-cash charge of $75.6 to impair Ashland Works Hot End property, plant and equipment and a $32.1 non-cash charge for income taxes due to the reduced value of deferred tax assets associated with new U.S. tax legislation.

Included in net income attributable to AK Holding in the fourth quarter and full year of 2016 were charges for the termination of a pellet offtake agreement with Magnetation and related transportation costs of $69.5, a pension corridor charge of $78.4, an OPEB corridor credit of $35.3 and a pension settlement charges of $25.0.

Included in net income attributable to AK Holding in the first quarter and full year of 2015 was an impairment charge of $256.3 for our investment in Magnetation. Included in the fourth quarter and full year of 2015 was an impairment charge of $41.6 for our investment in AFSG, costs of $28.1 for the temporary idling of the Ashland Works blast furnace and steelmaking operations, a pension corridor charge of $144.3 and an OPEB corridor credit of $13.1.

NOTE 20 - Supplementary Guarantor Information
 

AK Steel’s Secured Notes, 2020 Notes, 2021 Notes, 20222025 Notes and 2027 Notes (collectively, the “Senior Notes”) and the Exchangeable Notes are governed by indentures entered into by AK Holding and its 100%-owned subsidiary, AK Steel. Under the terms of the indentures, AK Holding and the Subsidiary Guarantors each fully and unconditionally, jointly and severally, guarantee the payment of interest, principal and premium, if any, on each of the notes included in the Senior Notes. Under the terms of the indenture for the Exchangeable Notes, AK Holding fully and unconditionally, jointly and severally, guarantees the payment of interest, principal and premium, if any, on the notes. AK Holding remainsis the sole guarantor of the Exchangeable Notes.

We present all investments in subsidiaries in the supplementary guarantor information using the equity method of accounting. Therefore, the net income (loss) of the subsidiaries accounted for using the equity method is in their parents’ investment accounts. The principal elimination entries eliminate investments in subsidiaries and inter-company balances and transactions. The following supplementary condensed consolidating financial statements present information about AK Holding, AK Steel, the Subsidiary Guarantors and the other non-guarantor subsidiaries.


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Condensed Statements of Comprehensive Income (Loss)
Year Ended December 31, 2016
Year Ended December 31, 2017Year Ended December 31, 2017
AK
Holding
 
AK
Steel
 Guarantor Subsidiaries of the Senior Notes Other Non-Guarantor Subsidiaries Eliminations Consolidated Company
AK
Holding
 
AK
Steel
 Guarantor Subsidiaries of the Senior Notes Other Non-Guarantor Subsidiaries Eliminations Consolidated Company
Net sales$
 $5,681.0
 $250.9
 $411.5
 $(460.9) $5,882.5
$
 $5,755.1
 $285.9
 $496.3
 $(456.8) $6,080.5
Cost of products sold (exclusive of items shown separately below)
 5,005.4
 176.1
 299.4
 (416.2) 5,064.7

 5,183.2
 203.1
 387.2
 (413.8) 5,359.7
Selling and administrative expenses (exclusive of items shown separately below)4.4
 280.8
 12.7
 22.6
 (43.3) 277.2
3.7
 283.5
 13.5
 26.9
 (44.7) 282.9
Depreciation
 187.8
 7.0
 21.8
 
 216.6

 189.3
 7.5
 29.2
 
 226.0
Pension and OPEB expense (income) (exclusive of corridor charges shown below)
 (43.8) 
 
 
 (43.8)
Pension and OPEB net corridor charge
 43.1
 
 
 
 43.1
Pension settlement charges
 25.0
 
 
 
 25.0
Charges for termination of pellet agreement and related transportation costs
 69.5
 
 
 
 69.5
Pension and OPEB expense (income)
 (64.4) 
 
 
 (64.4)
Charge (credit) for termination of pellet agreement and related transportation costs
 (19.3) 
 
 
 (19.3)
Asset impairment charge
 75.6
 
 
 
 75.6
Total operating costs4.4
 5,567.8
 195.8
 343.8
 (459.5) 5,652.3
3.7
 5,647.9
 224.1
 443.3
 (458.5) 5,860.5
Operating profit (loss)(4.4) 113.2
 55.1
 67.7
 (1.4) 230.2
(3.7) 107.2
 61.8
 53.0
 1.7
 220.0
Interest expense
 162.3
 
 1.6
 
 163.9

 150.3
 
 2.0
 
 152.3
Other income (expense)
 (16.4) 8.1
 8.6
 (5.2) (4.9)
 (30.1) 11.4
 5.4
 (3.8) (17.1)
Income (loss) before income taxes(4.4) (65.5) 63.2
 74.7
 (6.6) 61.4
(3.7) (73.2) 73.2
 56.4
 (2.1) 50.6
Income tax expense (benefit)
 (21.9) 24.0
 3.6
 (2.5) 3.2

 (42.1) 27.8
 (1.8) (0.9) (17.0)
Equity in net income (loss) of subsidiaries(3.4) 40.2
 
 (0.7) (36.1) 
9.9
 41.0
 
 
 (50.9) 
Net income (loss)(7.8) (3.4) 39.2
 70.4
 (40.2) 58.2
6.2
 9.9
 45.4
 58.2
 (52.1) 67.6
Less: Net income attributable to noncontrolling interests
 
 
 66.0
 
 66.0

 
 
 61.4
 
 61.4
Net income (loss) attributable to AK Steel Holding Corporation(7.8) (3.4) 39.2
 4.4
 (40.2) (7.8)6.2
 9.9
 45.4
 (3.2) (52.1) 6.2
Other comprehensive income (loss)123.7
 123.7
 
 (1.5) (122.2) 123.7
23.5
 23.5
 
 4.7
 (28.2) 23.5
Comprehensive income (loss) attributable to AK Steel Holding Corporation$115.9
 $120.3
 $39.2
 $2.9
 $(162.4) $115.9
$29.7
 $33.4
 $45.4
 $1.5
 $(80.3) $29.7

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Condensed Statements of Comprehensive Income (Loss)
Year Ended December 31, 2015
Year Ended December 31, 2016Year Ended December 31, 2016
AK
Holding
 
AK
Steel
 Guarantor Subsidiaries of the Senior Notes Other Non-Guarantor Subsidiaries Eliminations Consolidated Company
AK
Holding
 
AK
Steel
 Guarantor Subsidiaries of the Senior Notes Other Non-Guarantor Subsidiaries Eliminations Consolidated Company
Net sales$
 $6,498.2
 $256.2
 $533.0
 $(594.5) $6,692.9
$
 $5,681.0
 $250.9
 $411.5
 $(460.9) $5,882.5
Cost of products sold (exclusive of items shown separately below)
 5,984.9
 165.7
 425.1
 (543.7) 6,032.0

 5,005.4
 176.1
 299.4
 (416.2) 5,064.7
Selling and administrative expenses (exclusive of items shown separately below)4.9
 270.4
 13.1
 22.6
 (49.1) 261.9
4.4
 280.8
 12.7
 22.6
 (43.3) 277.2
Depreciation
 187.7
 7.4
 20.9
 
 216.0

 187.8
 7.0
 21.8
 
 216.6
Pension and OPEB expense (income) (exclusive of corridor charges shown below)
 (63.0) 
 
 
 (63.0)
 (43.8) 
 
 
 (43.8)
Pension and OPEB net corridor charge
 131.2
 
 
 
 131.2

 43.1
 
 
 
 43.1
Charge for facility idling
 28.1
 
 
 
 28.1
Pension settlement charges
 25.0
 
 
 
 25.0
Charge (credit) for termination of pellet agreement and related transportation costs
 69.5
 
 
 
 69.5
Total operating costs4.9
 6,539.3
 186.2
 468.6
 (592.8) 6,606.2
4.4
 5,567.8
 195.8
 343.8
 (459.5) 5,652.3
Operating profit (loss)(4.9) (41.1) 70.0
 64.4
 (1.7) 86.7
(4.4) 113.2
 55.1
 67.7
 (1.4) 230.2
Interest expense
 171.0
 
 2.0
 
 173.0

 162.3
 
 1.6
 
 163.9
Impairment of Magnetation investment
 
 
 (256.3) 
 (256.3)
Impairment of AFSG investment
 
 
 (41.6) 
 (41.6)
Other income (expense)
 6.4
 6.6
 (11.6) 
 1.4

 (16.4) 8.1
 8.6
 (5.2) (4.9)
Income (loss) before income taxes(4.9) (205.7) 76.6
 (247.1) (1.7) (382.8)(4.4) (65.5) 63.2
 74.7
 (6.6) 61.4
Income tax expense (benefit)
 39.6
 29.1
 (4.6) (0.7) 63.4

 (21.9) 24.0
 3.6
 (2.5) 3.2
Equity in net income (loss) of subsidiaries(504.1) (258.8) 
 0.6
 762.3
 
(3.4) 40.2
 
 (0.7) (36.1) 
Net income (loss)(509.0) (504.1) 47.5
 (241.9) 761.3
 (446.2)(7.8) (3.4) 39.2
 70.4
 (40.2) 58.2
Less: Net income attributable to noncontrolling interests
 
 
 62.8
 
 62.8

 
 
 66.0
 
 66.0
Net income (loss) attributable to AK Steel Holding Corporation(509.0) (504.1) 47.5
 (304.7) 761.3
 (509.0)(7.8) (3.4) 39.2
 4.4
 (40.2) (7.8)
Other comprehensive income (loss)17.2
 17.2
 
 (3.1) (14.1) 17.2
123.7
 123.7
 
 (1.5) (122.2) 123.7
Comprehensive income (loss) attributable to AK Steel Holding Corporation$(491.8) $(486.9) $47.5
 $(307.8) $747.2
 $(491.8)$115.9
 $120.3
 $39.2
 $2.9
 $(162.4) $115.9

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Condensed Statements of Comprehensive Income (Loss)
Year Ended December 31, 2014
Year Ended December 31, 2015Year Ended December 31, 2015
AK
Holding
 
AK
Steel
 Guarantor Subsidiaries of the Senior Notes Other Non-Guarantor Subsidiaries Eliminations Consolidated Company
AK
Holding
 
AK
Steel
 Guarantor Subsidiaries of the Senior Notes Other Non-Guarantor Subsidiaries Eliminations Consolidated Company
Net sales$
 $6,284.2
 $326.4
 $553.9
 $(658.8) $6,505.7
$
 $6,498.2
 $256.2
 $533.0
 $(594.5) $6,692.9
Cost of products sold (exclusive of items shown separately below)
 5,937.6
 244.4
 439.6
 (613.9) 6,007.7

 5,984.9
 165.7
 425.1
 (543.7) 6,032.0
Selling and administrative expenses (exclusive of items shown separately below)4.6
 251.0
 11.9
 27.7
 (48.0) 247.2
4.9
 270.4
 13.1
 22.6
 (49.1) 261.9
Depreciation
 176.1
 5.0
 20.8
 
 201.9

 187.7
 7.4
 20.9
 
 216.0
Pension and OPEB expense (income)
 (92.5) 
 
 
 (92.5)
Pension corridor charge
 2.0
 
 
 
 2.0
Pension and OPEB expense (income) (exclusive of corridor charges shown below)
 (63.0) 
 
 
 (63.0)
Pension and OPEB net corridor charge
 131.2
 
 
 
 131.2
Charge for facility idling
 28.1
 
 
 
 28.1
Total operating costs4.6
 6,274.2
 261.3
 488.1
 (661.9) 6,366.3
4.9
 6,539.3
 186.2
 468.6
 (592.8) 6,606.2
Operating profit (loss)(4.6) 10.0
 65.1
 65.8
 3.1
 139.4
(4.9) (41.1) 70.0
 64.4
 (1.7) 86.7
Interest expense
 142.1
 
 2.6
 
 144.7

 171.0
 
 2.0
 
 173.0
Impairment of Magnetation investment
 
 
 (256.3) 
 (256.3)
Impairment of AFSG investment
 
 
 (41.6) 
 (41.6)
Other income (expense)
 (17.7) 6.5
 (9.9) 
 (21.1)
 6.4
 6.6
 (11.6) 
 1.4
Income (loss) before income taxes(4.6) (149.8) 71.6
 53.3
 3.1
 (26.4)(4.9) (205.7) 76.6
 (247.1) (1.7) (382.8)
Income tax expense (benefit)
 (19.2) 28.6
 (2.9) 1.2
 7.7

 39.6
 29.1
 (4.6) (0.7) 63.4
Equity in net income (loss) of subsidiaries(92.3) 38.3
 
 (0.7) 54.7
 
(504.1) (258.8) 
 0.6
 762.3
 
Net income (loss)(96.9) (92.3) 43.0
 55.5
 56.6
 (34.1)(509.0) (504.1) 47.5
 (241.9) 761.3
 (446.2)
Less: Net income attributable to noncontrolling interests
 
 
 62.8
 
 62.8

 
 
 62.8
 
 62.8
Net income (loss) attributable to AK Steel Holding Corporation(96.9) (92.3) 43.0
 (7.3) 56.6
 (96.9)(509.0) (504.1) 47.5
 (304.7) 761.3
 (509.0)
Other comprehensive income (loss)(527.8) (527.8) 
 (3.7) 531.5
 (527.8)17.2
 17.2
 
 (3.1) (14.1) 17.2
Comprehensive income (loss) attributable to AK Steel Holding Corporation$(624.7) $(620.1) $43.0
 $(11.0) $588.1
 $(624.7)$(491.8) $(486.9) $47.5
 $(307.8) $747.2
 $(491.8)


Table of Contents

Condensed Balance Sheets
December 31, 2016
December 31, 2017December 31, 2017
                      
AK
Holding
 
AK
Steel
 Guarantor Subsidiaries of the Senior Notes Other Non-Guarantor Subsidiaries Eliminations Consolidated Company
AK
Holding
 
AK
Steel
 Guarantor Subsidiaries of the Senior Notes Other Non-Guarantor Subsidiaries Eliminations Consolidated Company
ASSETS                      
Current assets:                      
Cash and cash equivalents$
 $147.9
 $4.4
 $20.9
 $
 $173.2
$
 $14.5
 $7.2
 $16.3
 $
 $38.0
Accounts receivable, net
 400.4
 30.3
 19.6
 (8.3) 442.0

 432.4
 33.2
 65.4
 (13.2) 517.8
Inventory, net
 1,038.1
 45.3
 42.0
 (11.5) 1,113.9

 998.1
 51.3
 108.3
 (9.9) 1,147.8
Other current assets
 91.5
 0.2
 2.9
 
 94.6

 124.7
 0.2
 5.4
 
 130.3
Total current assets
 1,677.9
 80.2
 85.4
 (19.8) 1,823.7

 1,569.7
 91.9
 195.4
 (23.1) 1,833.9
Property, plant and equipment
 5,857.9
 175.9
 535.2
 
 6,569.0

 6,004.0
 181.5
 646.3
 
 6,831.8
Accumulated depreciation
 (4,365.8) (87.2) (101.6) 
 (4,554.6)
 (4,620.8) (94.8) (130.0) 
 (4,845.6)
Property, plant and equipment, net
 1,492.1
 88.7
 433.6
 
 2,014.4

 1,383.2
 86.7
 516.3
 
 1,986.2
Other non-current assets:                      
Investment in subsidiaries(3,227.1) 1,406.2
 
 67.5
 1,753.4
 
(3,297.1) 1,843.2
 
 67.5
 1,386.4
 
Inter-company accounts2,954.9
 (4,041.9) 1,464.0
 (458.4) 81.4
 
3,081.1
 
 1,525.2
 
 (4,606.3) 
Goodwill and intangible assets
 
 32.8
 273.9
 
 306.7
Other non-current assets
 126.0
 33.0
 38.9
 
 197.9

 124.8
 0.2
 44.3
 
 169.3
TOTAL ASSETS$(272.2) $660.3
 $1,665.9
 $167.0
 $1,815.0
 $4,036.0
$(216.0) $4,920.9
 $1,736.8
 $1,097.4
 $(3,243.0) $4,296.1
LIABILITIES AND EQUITY (DEFICIT)                      
Current liabilities:                      
Accounts payable$
 $557.7
 $16.7
 $15.0
 $0.5
 $589.9
$
 $623.3
 $17.9
 $50.9
 $(1.7) $690.4
Accrued liabilities
 213.7
 7.0
 13.4
 
 234.1

 228.2
 7.8
 34.5
 
 270.5
Current portion of pension and other postretirement benefit obligations
 41.0
 
 0.3
 
 41.3

 39.7
 
 0.4
 
 40.1
Total current liabilities
 812.4
 23.7
 28.7
 0.5
 865.3

 891.2
 25.7
 85.8
 (1.7) 1,001.0
Non-current liabilities:                      
Long-term debt
 1,816.6
 
 
 
 1,816.6

 2,110.1
 
 
 
 2,110.1
Pension and other postretirement benefit obligations
 1,090.4
 
 3.3
 
 1,093.7

 890.8
 
 3.4
 
 894.2
Inter-company accounts
 4,200.0
 
 489.1
 (4,689.1) 
Other non-current liabilities
 146.7
 1.6
 0.1
 
 148.4

 125.9
 1.0
 34.7
 
 161.6
TOTAL LIABILITIES
 3,866.1
 25.3
 32.1
 0.5
 3,924.0

 8,218.0
 26.7
 613.0
 (4,690.8) 4,166.9
EXCHANGEABLE NOTES EXCHANGE FEATURE
 21.3
 
 
 
 21.3
Equity (deficit):                      
Total stockholders’ equity (deficit)(272.2) (3,227.1) 1,640.6
 (228.0) 1,814.5
 (272.2)(216.0) (3,297.1) 1,710.1
 139.2
 1,447.8
 (216.0)
Noncontrolling interests
 
 
 362.9
 
 362.9

 
 
 345.2
 
 345.2
TOTAL EQUITY (DEFICIT)(272.2) (3,227.1) 1,640.6
 134.9
 1,814.5
 90.7
(216.0) (3,297.1) 1,710.1
 484.4
 1,447.8
 129.2
TOTAL LIABILITIES AND EQUITY (DEFICIT)$(272.2) $660.3
 $1,665.9
 $167.0
 $1,815.0
 $4,036.0
$(216.0) $4,920.9
 $1,736.8
 $1,097.4
 $(3,243.0) $4,296.1

Table of Contents

Condensed Balance Sheets
December 31, 2015
December 31, 2016December 31, 2016
                      
AK
Holding
 
AK
Steel
 Guarantor Subsidiaries of the Senior Notes Other Non-Guarantor Subsidiaries Eliminations Consolidated Company
AK
Holding
 
AK
Steel
 Guarantor Subsidiaries of the Senior Notes Other Non-Guarantor Subsidiaries Eliminations Consolidated Company
ASSETS                      
Current assets:                      
Cash and cash equivalents$
 $27.0
 $5.7
 $23.9
 $
 $56.6
$
 $147.9
 $4.4
 $20.9
 $
 $173.2
Accounts receivable, net
 411.9
 26.3
 29.2
 (22.5) 444.9

 400.4
 30.3
 19.6
 (8.3) 442.0
Inventory, net
 1,149.6
 39.7
 47.0
 (10.0) 1,226.3

 1,038.1
 45.3
 42.0
 (11.5) 1,113.9
Other current assets
 75.6
 0.3
 2.5
 
 78.4

 91.5
 0.2
 2.9
 
 94.6
Total current assets
 1,664.1
 72.0
 102.6
 (32.5) 1,806.2

 1,677.9
 80.2
 85.4
 (19.8) 1,823.7
Property, plant and equipment
 5,763.8
 168.6
 533.6
 
 6,466.0

 5,857.9
 175.9
 535.2
 
 6,569.0
Accumulated depreciation
 (4,218.0) (80.3) (81.2) 
 (4,379.5)
 (4,365.8) (87.2) (101.6) 
 (4,554.6)
Property, plant and equipment, net
 1,545.8
 88.3
 452.4
 
 2,086.5

 1,492.1
 88.7
 433.6
 
 2,014.4
Other non-current assets:                      
Investment in subsidiaries(3,541.0) 1,346.0
 
 68.2
 2,126.8
 
(3,227.1) 1,406.2
 
 67.5
 1,753.4
 
Inter-company accounts2,563.4
 (3,600.9) 1,398.1
 (453.5) 92.9
 
2,954.9
 
 1,464.0
 
 (4,418.9) 
Goodwill and intangible assets
 
 32.8
 
 
 32.8
Other non-current assets
 125.6
 33.0
 33.1
 
 191.7

 126.0
 0.2
 38.9
 
 165.1
TOTAL ASSETS$(977.6) $1,080.6
 $1,591.4
 $202.8
 $2,187.2
 $4,084.4
$(272.2) $4,702.2
 $1,665.9
 $625.4
 $(2,685.3) $4,036.0
LIABILITIES AND EQUITY (DEFICIT)                      
Current liabilities:                      
Accounts payable$
 $669.0
 $11.7
 $23.7
 $(1.0) $703.4
$
 $557.7
 $16.7
 $15.0
 $0.5
 $589.9
Accrued liabilities
 242.3
 6.5
 12.7
 
 261.5

 213.7
 7.0
 13.4
 
 234.1
Current portion of pension and other postretirement benefit obligations
 77.3
 
 0.4
 
 77.7

 41.0
 
 0.3
 
 41.3
Total current liabilities
 988.6
 18.2
 36.8
 (1.0) 1,042.6

 812.4
 23.7
 28.7
 0.5
 865.3
Non-current liabilities:                      
Long-term debt
 2,354.1
 
 
 
 2,354.1

 1,816.6
 
 
 
 1,816.6
Pension and other postretirement benefit obligations
 1,143.6
 
 3.3
 
 1,146.9

 1,090.4
 
 3.3
 
 1,093.7
Inter-company accounts
 4,041.9
 
 458.4
 (4,500.3) 
Other non-current liabilities
 135.3
 0.9
 0.2
 
 136.4

 146.7
 1.6
 0.1
 
 148.4
TOTAL LIABILITIES
 4,621.6
 19.1
 40.3
 (1.0) 4,680.0

 7,908.0
 25.3
 490.5
 (4,499.8) 3,924.0
EXCHANGEABLE NOTES EXCHANGE FEATURE
 21.3
 
 
 
 21.3
Equity (deficit):                      
Total stockholders’ equity (deficit)(977.6) (3,541.0) 1,572.3
 (219.5) 2,188.2
 (977.6)(272.2) (3,227.1) 1,640.6
 (228.0) 1,814.5
 (272.2)
Noncontrolling interests
 
 
 382.0
 
 382.0

 
 
 362.9
 
 362.9
TOTAL EQUITY (DEFICIT)(977.6) (3,541.0) 1,572.3
 162.5
 2,188.2
 (595.6)(272.2) (3,227.1) 1,640.6
 134.9
 1,814.5
 90.7
TOTAL LIABILITIES AND EQUITY (DEFICIT)$(977.6) $1,080.6
 $1,591.4
 $202.8
 $2,187.2
 $4,084.4
$(272.2) $4,702.2
 $1,665.9
 $625.4
 $(2,685.3) $4,036.0


Table of Contents

Condensed Statements of Cash Flows
Year Ended December 31, 2016
Year Ended December 31, 2017Year Ended December 31, 2017
                      
AK
Holding
 
AK
Steel
 Guarantor Subsidiaries of the Senior Notes Other Non-Guarantor Subsidiaries Eliminations Consolidated Company
AK
Holding
 
AK
Steel
 Guarantor Subsidiaries of the Senior Notes Other Non-Guarantor Subsidiaries Eliminations Consolidated Company
Net cash flows from operating activities$(3.1) $186.5
 $44.3
 $92.2
 $(15.3) $304.6
$(2.5) $67.3
 $73.3
 $61.7
 $(1.0) $198.8
Cash flows from investing activities:                      
Capital investments
 (116.0) (8.8) (2.8) 
 (127.6)
 (131.8) (5.6) (15.1) 
 (152.5)
Investment in acquired business, net of cash acquired
 (360.4) 
 
 
 (360.4)
Other investing items, net
 3.0
 
 (0.7) 
 2.3

 4.0
 
 0.2
 
 4.2
Net cash flows from investing activities
 (113.0) (8.8) (3.5) 
 (125.3)
 (488.2) (5.6) (14.9) 
 (508.7)
Cash flows from financing activities:                      
Net borrowings (repayments) under credit facility
 (550.0) 
 
 
 (550.0)
 450.0
 
 
 
 450.0
Proceeds from issuance of long-term debt
 380.0
 
 
 
 380.0

 680.0
 
 
 
 680.0
Redemption of long-term debt
 (392.8) 
 
 
 (392.8)
 (848.4) 
 
 
 (848.4)
Proceeds from issuance of common stock600.4
 
 
 
 
 600.4
Debt issuance costs
 (20.4) 
 
 
 (20.4)
 (25.3) 
 
 
 (25.3)
Inter-company activity(602.4) 630.5
 (36.8) (6.6) 15.3
 
5.0
 31.2
 (64.9) 27.7
 1.0
 
SunCoke Middletown distributions to noncontrolling interest owners
 
 
 (85.1) 
 (85.1)
 
 
 (79.1) 
 (79.1)
Other financing items, net5.1
 0.1
 
 
 
 5.2
(2.5) 
 
 
 
 (2.5)
Net cash flows from financing activities3.1
 47.4
 (36.8) (91.7) 15.3
 (62.7)2.5
 287.5
 (64.9) (51.4) 1.0
 174.7
Net increase (decrease) in cash and cash equivalents
 120.9
 (1.3) (3.0) 
 116.6

 (133.4) 2.8
 (4.6) 
 (135.2)
Cash and equivalents, beginning of year
 27.0
 5.7
 23.9
 
 56.6

 147.9
 4.4
 20.9
 
 173.2
Cash and equivalents, end of year$
 $147.9
 $4.4
 $20.9
 $
 $173.2
$
 $14.5
 $7.2
 $16.3
 $
 $38.0

Condensed Statements of Cash Flows
Year Ended December 31, 2015
Year Ended December 31, 2016Year Ended December 31, 2016
                      
AK
Holding
 
AK
Steel
 Guarantor Subsidiaries of the Senior Notes Other Non-Guarantor Subsidiaries Eliminations Consolidated Company
AK
Holding
 
AK
Steel
 Guarantor Subsidiaries of the Senior Notes Other Non-Guarantor Subsidiaries Eliminations Consolidated Company
Net cash flows from operating activities$(3.7) $49.0
 $50.6
 $108.1
 $(3.7) $200.3
$(3.1) $186.5
 $44.3
 $92.2
 $(15.3) $304.6
Cash flows from investing activities:                      
Capital investments
 (85.0) (9.0) (5.0) 
 (99.0)
 (116.0) (8.8) (2.8) 
 (127.6)
Proceeds from sale of equity investee
 25.0
 
 
 
 25.0
Proceeds from AFSG Holdings, Inc. distribution
 
 
 14.0
 
 14.0
Other investing items, net
 12.5
 
 
 
 12.5

 3.0
 
 (0.7) 
 2.3
Net cash flows from investing activities
 (47.5) (9.0) 9.0
 
 (47.5)
 (113.0) (8.8) (3.5) 
 (125.3)
Cash flows from financing activities:                      
Net borrowings (repayments) under credit facility
 (55.0) 
 
 
 (55.0)
 (550.0) 
 
 
 (550.0)
Proceeds from issuance of long-term debt
 380.0
 
 
 
 380.0
Redemption of long-term debt
 (14.1) 
 
 
 (14.1)
 (392.8) 
 
 
 (392.8)
Proceeds from issuance of common stock600.4
 
 
 
 
 600.4
Debt issuance costs
 (20.4) 
 
 
 (20.4)
Inter-company activity4.7
 66.1
 (40.4) (34.1) 3.7
 
(602.4) 630.5
 (36.8) (6.6) 15.3
 
SunCoke Middletown distributions to noncontrolling interest owners
 
 
 (96.3) 
 (96.3)
 
 
 (85.1) 
 (85.1)
Other financing items, net(1.0) 
 
 
 
 (1.0)5.1
 0.1
 
 
 
 5.2
Net cash flows from financing activities3.7
 (3.0) (40.4) (130.4) 3.7
 (166.4)3.1
 47.4
 (36.8) (91.7) 15.3
 (62.7)
Net increase (decrease) in cash and cash equivalents
 (1.5) 1.2
 (13.3) 
 (13.6)
 120.9
 (1.3) (3.0) 
 116.6
Cash and equivalents, beginning of year
 28.5
 4.5
 37.2
 
 70.2

 27.0
 5.7
 23.9
 
 56.6
Cash and equivalents, end of year$
 $27.0
 $5.7
 $23.9
 $
 $56.6
$
 $147.9
 $4.4
 $20.9
 $
 $173.2

Table of Contents

Condensed Statements of Cash Flows
Year Ended December 31, 2014
Year Ended December 31, 2015Year Ended December 31, 2015
                      
AK
Holding
 
AK
Steel
 Guarantor Subsidiaries of the Senior Notes Other Non-Guarantor Subsidiaries Eliminations Consolidated Company
AK
Holding
 
AK
Steel
 Guarantor Subsidiaries of the Senior Notes Other Non-Guarantor Subsidiaries Eliminations Consolidated Company
Net cash flows from operating activities$(3.4) $(447.2) $38.1
 $92.4
 $(2.7) $(322.8)$(3.7) $49.0
 $50.6
 $108.1
 $(3.7) $200.3
Cash flows from investing activities:                      
Capital investments
 (63.1) (5.3) (12.7) 
 (81.1)
 (85.0) (9.0) (5.0) 
 (99.0)
Investments in Magnetation joint venture
 
 
 (100.0) 
 (100.0)
Investments in acquired business, net of cash acquired
 (690.3) 
 
 
 (690.3)
Proceeds from sale of equity investee
 25.0
 
 
 
 25.0
Proceeds from AFSG Holdings, Inc. distribution
 
 
 14.0
 
 14.0
Other investing items, net
 13.6
 
 
 
 13.6

 12.5
 
 
 
 12.5
Net cash flows from investing activities
 (739.8) (5.3) (112.7) 
 (857.8)
 (47.5) (9.0) 9.0
 
 (47.5)
Cash flows from financing activities:                      
Net borrowings (repayments) under credit facility
 515.0
 
 
 
 515.0

 (55.0) 
 
 
 (55.0)
Proceeds from issuance of long-term debt
 427.1
 
 
 
 427.1
Redemption of long-term debt
 (0.8) 
 
 
 (0.8)
 (14.1) 
 
 
 (14.1)
Proceeds from issuance of common stock345.3
 
 
 
 
 345.3
Debt issuance costs
 (15.5) 
 
 
 (15.5)
Inter-company activity(341.0) 272.9
 (28.3) 93.7
 2.7
 
4.7
 66.1
 (40.4) (34.1) 3.7
 
SunCoke Middletown distributions to noncontrolling interest owners
 
 
 (61.0) 
 (61.0)
 
 
 (96.3) 
 (96.3)
Other financing items, net(0.9) 
 
 (3.7) 
 (4.6)(1.0) 
 
 
 
 (1.0)
Net cash flows from financing activities3.4
 1,198.7
 (28.3) 29.0
 2.7
 1,205.5
3.7
 (3.0) (40.4) (130.4) 3.7
 (166.4)
Net increase (decrease) in cash and cash equivalents
 11.7
 4.5
 8.7
 
 24.9

 (1.5) 1.2
 (13.3) 
 (13.6)
Cash and equivalents, beginning of year
 16.8
 
 28.5
 
 45.3

 28.5
 4.5
 37.2
 
 70.2
Cash and equivalents, end of year$
 $28.5
 $4.5
 $37.2
 $
 $70.2
$
 $27.0
 $5.7
 $23.9
 $
 $56.6

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

None.

Item 9A.Controls and Procedures.

We maintain a system of disclosure controls and procedures that is designed to provide reasonable assurance that information is disclosed and accumulated and communicated to management in a timely fashion. An evaluation of the effectiveness of the design and operation of its disclosure controls and procedures (as defined in Rule 13a-15(e) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) was performed as of the end of the period covered by this report. This evaluation was performed under the supervision and with the participation of management, including the Chief Executive Officer and Chief Financial Officer. Based upon that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures are effective to provide reasonable assurance that information we are required to disclose in the reports that we file or submit under the Exchange Act is accumulated and communicated to management, including the Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure and are effective to provide reasonable assurance that such information is recorded, processed, summarized and reported within the time periods specified by the Securities and Exchange Commission’s rules and forms.

We have excluded Precision Partners from our assessment of internal control over financial reporting as of December 31, 2017, because we acquired this business in the third quarter of 2017 and it was not practicable to conduct an assessment of Precision Partner’s internal control over financial reporting in the period between the acquisition date and the date of management’s assessment.

There has been no change in our internal control over financial reporting during the fourth quarter ended December 31, 2016,2017, that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

Management’s Report on Internal Control over Financial Reporting and the Report of Independent Registered Public Accounting Firm are presented on the following pages.

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MANAGEMENT’S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING

Management is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Rule 13a-15(f) or 15d-15(f) promulgated under the Securities Exchange Act of 1934. Those rules define internal control over financial reporting as 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 and include those policies and procedures that:

a)Pertain to the maintenance of records that in reasonable detail accurately and fairly reflect the transactions and dispositions of assets;

b)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 are being made only in accordance with authorizations of management and directors; and

c)Provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of 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. 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.

We assessed the effectiveness of our internal control over financial reporting as of December 31, 2016.2017. In making this assessment, we used the criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 Framework). Our evaluation of internal control over financial reporting did not include the internal controls of Precision Partners, which is included in the 2017 consolidated financial statements and constituted approximately 11% of total assets as of December 31, 2017, and less than 2% of net sales for the year then ended.

Based on our assessment and those criteria, we have determined that, as of December 31, 2016,2017, our internal control over financial reporting was effective.

Our independent registered public accounting firm has issued an attestation report on the effectiveness of our internal control over financial reporting, which appears on the following page.

Dated:February 17, 201715, 2018 /s/ Roger K. Newport
   Roger K. Newport
   Chief Executive Officer and Director
    
    
Dated:February 17, 201715, 2018 /s/ Jaime Vasquez
   Jaime Vasquez
   Vice President, Finance and Chief Financial Officer
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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Stockholders of
AK Steel Holding Corporation

Opinion on Internal Control over Financial Reporting

We have audited AK Steel Holding Corporation’s internal control over financial reporting as of December 31, 2016,2017, 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). In our opinion, AK Steel Holding Corporation’sCorporation (the Company) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2017, based on the COSO criteria.

As indicated in the accompanying Management’s Report on Internal Control Over Financial Reporting, management’s assessment of and conclusion on the effectiveness of internal control over financial reporting did not include the internal controls of PPHC Holdings, LLC (Precision Partners), which is included in the 2017 consolidated financial statements of the Company and constituted 11% of total assets as of December 31, 2017 and less than 2% of net sales for the year then ended. Our audit of internal control over financial reporting of the Company also did not include an evaluation of the internal control over reporting of Precision Partners.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheets of the Company as of December 31, 2017 and 2016, and the related consolidated statements of operations, comprehensive income (loss), stockholders’ equity (deficit), and cash flows, for each of the three years in the period ended December 31, 2017, and the related notes of the Company and our report dated February 15, 2018 expressed an unqualified opinion thereon.

Basis for Opinion

The Company’s 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.Reporting. Our responsibility is to express an opinion on the company’sCompany’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States).PCAOB. 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.

Definition and Limitations of Internal Control Over Financial Reporting

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 material misstatements. Also, projections of any evaluation of the 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, AK Steel Holding Corporation maintained, in all material respects, effective internal control over financial reporting as of December 31, 2016, based on the COSO criteria.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the 2016 consolidated financial statements of AK Steel Holding Corporation and our report dated February 17, 2017 expressed an unqualified opinion thereon.

/s/ ERNST & YOUNG LLP

Cincinnati, Ohio
February 17, 201715, 2018
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Item 9B.Other Information.

None.

PART III

Item 10.Directors, Executive Officers and Corporate Governance.

Information with respect to our Executive Officers is set forth in Part I of this Annual Report pursuant to General Instruction G of Form 10-K. The information required to be furnished pursuant to this item with respect to our Directors will be set forth under the caption “Election of Directors” in our proxy statement (the “2017“2018 Proxy Statement”) to be furnished to stockholders in connection with the solicitation of proxies by our Board of Directors for use at the 20172018 Annual Meeting of Stockholders, and such information under that caption is incorporated herein by reference.

The information required to be furnished pursuant to this item with respect to compliance with Section 16(a) of the Exchange Act will be set forth under the caption “Section 16(a) Beneficial Ownership Reporting Compliance” in the 20172018 Proxy Statement, and is incorporated herein by reference.

The information required to be furnished pursuant to this item with respect to the Audit Committee and the Audit Committee financial expert will be set forth under the caption “Committees of the Board of Directors” in the 20172018 Proxy Statement, and is incorporated herein by reference.

Information required to be furnished pursuant to this item with respect to and any material changes to the process by which security holders may recommend nominees to the Board of Directors will be set forth under the caption “Stockholder Proposals for the 20172018 Annual Meeting and Nominations of Directors” in the 20172018 Proxy Statement, and is incorporated herein by reference.

We have adopted a Code of Ethics for Principal Officers covering our Chief Executive Officer, Chief Financial Officer, Chief Accounting Officer and other persons performing a similar function; a Code of Business Conduct and Ethics for Directors, Officers and Employees;employees; and Corporate Governance Guidelines. These documents, along with charters of our Audit, Management Development and Compensation, Nominating and Governance, Finance, and Public and Environmental Issues Committees, are posted on our website at www.aksteel.com. Disclosures of amendments to or waivers with regard to the provisions of the Code of Ethics also will be posted on our website.

Item 11.Executive Compensation.

The information required to be furnished pursuant to this item will be set forth under the caption “Executive Compensation” and in the Director Compensation Table and its accompanying narrative in the 20172018 Proxy Statement, and is incorporated herein by reference.

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

The information required to be furnished pursuant to this item with respect to compensation plans under which our equity securities are authorized for issuance will be set forth under the caption “Equity Compensation Plan Information” in the 20172018 Proxy Statement, and is incorporated herein by reference.

Other information required to be furnished pursuant to this item will be set forth under the caption “Stock Ownership” in the 20172018 Proxy Statement, and is incorporated herein by reference.

Item 13.Certain Relationships and Related Transactions, and Director Independence.

The information required to be furnished pursuant to this item will be set forth under the captions “Related Person Transactions” and “Board Independence” in the 20172018 Proxy Statement, and is incorporated herein by reference.

Item 14.Principal Accounting Fees and Services.

The information required to be furnished pursuant to this item will be set forth under the caption “Principal Accounting Firm Fees” in the 20172018 Proxy Statement, and is incorporated herein by reference.


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PART IV

Item 15.Exhibits, Financial Statement Schedules.

(a)(1) Financial Statements

The consolidated financial statements of AK Steel Holding Corporation filed as part of this Annual Report are included in Item 8.

(a)(2)  Financial Statement Schedules

All financial statement schedules are omitted because they are not applicable or the required information is contained in the applicable financial statements or notes thereto.

 (a)(3)  Exhibits

The list of exhibits begins on the next page.

Item 16.Form 10-K Summary.

None.

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INDEX TO EXHIBITS
Exhibit
Number
 
 
 Description 
 Restated Certificate of Incorporation of AK Steel Holding Corporation (incorporated herein by reference to Exhibit 3.1 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2016, as filed with the Commission on October 25, 2016).
   
 By-laws of AK Steel Holding Corporation, as amended and restated as of January 19, 2017 (incorporated herein by reference to Exhibit 3.1 to AK Steel Holding Corporation’s Current Report on Form 8-K, as filed with the Commission on January 20, 2017).
   
 Indenture, dated as of May 11, 2010, among AK Steel Corporation, as issuer, AK Steel Holding Corporation, as guarantor, and U.S. Bank National Association, as trustee (incorporated herein by reference to Exhibit 4.1 to AK Steel Holding Corporation’s Current Report on Form 8-K, as filed with the Commission on May 11, 2010).
   
First Supplemental Indenture, dated as of May 11, 2010, among AK Steel Corporation, as issuer, AK Steel Holding Corporation, as guarantor, and U.S. Bank National Association, as trustee (incorporated herein by reference to Exhibit 4.2 to AK Steel Holding Corporation’s Current Report on Form 8-K, as filed with the Commission on May 11, 2010).
4.1(b)Second Supplemental Indenture, dated as of March 22, 2012, among AK Steel Corporation, as issuer, AK Steel Holding Corporation, as guarantor, and U.S. Bank, National Association, as trustee (incorporated herein by reference to Exhibit 4.1 to AK Steel Holding Corporation’s Current Report on Form 8-K, as filed with the Commission on March 22, 2012).
4.1(c) Third Supplemental Indenture, dated as of November 20, 2012, among AK Steel Corporation, as issuer, AK Steel Holding Corporation, as guarantor, and U.S. Bank, National Association, as trustee (incorporated herein by reference to Exhibit 4.1 to AK Steel Holding Corporation’s Current Report on Form 8-K, as filed with the Commission on November 20, 2012).
   
4.1(d) Fourth Supplemental Indenture, dated as of April 29, 2014, among AK Steel Corporation, as issuer, AK Steel Holding Corporation, as parent guarantor, AK Tube LLC and AK Steel Properties, Inc., as subsidiary guarantors, and U.S. Bank National Association, as trustee (incorporated herein by reference to Exhibit 4.2 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q, as filed with the Commission on May 2, 2014).
   
4.1(e) Fifth Supplemental Indenture, dated as of September 16, 2014, among AK Steel Corporation, as issuer, AK Steel Holding Corporation, as parent guarantor, AK Steel Properties, Inc. and AK Tube LLC, as subsidiary guarantors, and U.S. Bank National Association, as trustee (incorporated herein by reference to Exhibit 4.1 to AK Steel Holding Corporation’s Current Report on Form 8-K, as filed with the Commission on September 16, 2014).
   
4.1(f) Sixth Supplemental Indenture, dated as of July 27, 2016, among AK Steel Corporation, as issuer, AK Steel Holding Corporation, as parent guarantor, Mountain State Carbon, LLC, as subsidiary guarantor, and U.S. Bank National Association, as trustee (incorporated herein by reference to Exhibit 4.3 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2016, as filed with the Commission on July 29, 2016).
   
Seventh Supplemental Indenture, dated as of March 23, 2017, among AK Steel Corporation, as issuer, the guarantors named therein and U.S. Bank National Association, as trustee (incorporated herein by reference to Exhibit 4.1 to AK Steel Holding Corporation’s Current Report on Form 8-K, as filed with the Commission on March 23, 2017)
Eighth Supplemental Indenture, dated as of August 9, 2017, among AK Steel Corporation, as issuer, the guarantors named therein and U.S. Bank National Association, as trustee. (incorporated herein by reference to Exhibit 4.1 to AK Steel Holding Corporation’s Current Report on Form 8-K, as filed with the Commission on August 9, 2017)
 Indenture, dated as of June 20, 2016, among AK Steel Corporation, as issuer, the guarantors named therein and U.S. Bank National Association, as trustee and collateral agent (incorporated herein by reference to Exhibit 4.1 to AK Steel Holding Corporation’s Current Report on Form 8-K, as filed with the Commission on June 20, 2016).
   
 First Supplemental Indenture dated as of July 27, 2016, among AK Steel Corporation, as issuer, Mountain State Carbon, LLC, as subsidiary guarantor and U.S. Bank National Association, as trustee and collateral agent (incorporated herein by reference to Exhibit 4.2 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2016, as filed with the Commission on July 29, 2016).
   
 Executive Deferred Compensation Plan, as amended and restated as of October 18, 2007 (incorporated herein by reference to Exhibit 10.2 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2007, as filed with the Commission on November 6, 2007).
   
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Exhibit
Number
 
 
 Description 
 Directors’ Deferred Compensation Plan, as amended and restated as of October 18, 2007 (incorporated herein by reference to Exhibit 10.3 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2007, as filed with the Commission on November 6, 2007).
   
 Policy Concerning Severance Agreements with Senior Executives (incorporated herein by reference to Exhibit 99.3 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2003, as filed with the Commission on November 14, 2003).
   
 AnnualOmnibus Management Incentive Plan, as amended and restated as of October 18, 2007May 25, 2017 (incorporated herein by reference to Exhibit 10.1 to AK Steel Holding Corporation’s QuarterlyCurrent Report on Form 10-Q for the quarter ended June 30, 2008,8-K, as filed with the Commission on August 5, 2008).May 26, 2017)
   
10.4(a)+First Amendment to the Annual Management Incentive Plan, as amended and restated as of October 18, 2007 (incorporated herein by reference to Exhibit 10.4(a) to AK Steel Holding Corporation’s Annual Report on Form 10-K for the year ended December 31, 2013, as filed with the Commission on February 21, 2014).
10.4(b)+Second Amendment to the Annual Management Incentive Plan, as amended and restated as of October 18, 2007 (incorporated herein by reference to Exhibit 10.1 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2015, as filed with the Commission on May 5, 2015).
 Supplemental Thrift Plan, as amended and restated as of October 18, 2007 (incorporated herein by reference to Exhibit 10.5 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2007, as filed with the Commission on November 6, 2007).January 1, 2018.
   
 Executive Minimum and Supplemental Retirement Plan, as amended and restated as of October 18, 2007 (incorporated herein by reference to Exhibit 10.1 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2007, as filed with the Commission on November 6, 2007).
   
 First Amendment to the Executive Minimum and Supplemental Retirement Plan, as amended and restated as of October 18, 2007 (incorporated herein by reference to Exhibit 10.1 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2008, as filed with the Commission on November 4, 2008).
   
 Second Amendment to the Executive Minimum and Supplemental Retirement Plan, as amended and restated as of October 18, 2007 (incorporated herein by reference to Exhibit 10.4 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2009, as filed with the Commission on November 3, 2009).
   
 Executive Retirement Income Plan adopted March 20, 2014 (incorporated by reference to Exhibit 10.10 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2014, as filed with the Commission on May 2, 2014).
   
* Form of Executive Officer Severance Agreement.
*10.9+Form of Executive Officer Change of Control Agreement.
10.10+Form of Restricted Stock Award for special bonus grants to executive officers and selected key managers of AK SteelAgreement (incorporated herein by reference to Exhibit 10.2510.8 to AK Steel Holding Corporation’s Annual Report on Form 10-K for the year ended December 31, 2004,2016, as filed with the Commission on March 8, 2005)February 17, 2017).
   
 10.11+ Form of the Performance Share AwardExecutive Officer Change of Control Agreement for performance-based equity awards to executive officers and key managers of AK Steel (incorporated herein by reference to Exhibit 10.2610.9 to AK Steel Holding Corporation’s Annual Report on Form 10-K for the year ended December 31, 2004,2016, as filed with the Commission on March 8, 2005)February 17, 2017).
   
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Exhibit10.10+
Number
 Description 
 10.12+ AK Steel Holding Corporation Stock Incentive Plan, as amended and restated as of May 26, 2016 (incorporated herein by reference to Exhibit 10.1 to AK Steel Holding Corporation’s Current Report on Form 8-K, as filed with the Commission on May 27, 2016).
   
10.13+ Long-Term Performance Plan, as amended and restated as of April 12, 2010 (incorporated herein by reference to Annex A to AK Steel Holding Corporation’s Proxy Statement for its 2010 Annual Meeting of Stockholders held May 27, 2010, as filed with the Commission on April 12, 2010).
10.14Amended and Restated Loan and Security Agreement, dated as of March 17, 2014, among AK Steel, as Borrower, and certain financial institutions as the lenders party thereto (incorporated herein by reference to Exhibit 10.1 to AK Steel Holding Corporation’s Current Report on Form 8-K, as filed with the Commission on March 18, 2014).
10.14(a)Joinder to Amended and Restated Loan and Security Agreement dated as of April 29, 2014, among AK Steel Corporation, AK Tube LLC and Bank of America, N.A., as agent for the Lenders (incorporated by reference to Exhibit 10.4 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2014, as filed with the Commission on May 2, 2014).
10.14(b)First Amendment toSecond Amended and Restated Loan and Security Agreement, dated as of September 16, 2014,13, 2017, among AK Steel Corporation, as Borrower, AK Tube LLC, as Borrowing Base Guarantor,the guarantors named therein, certain financial institutions, as Lenders, and Bank of America, N.A., as agent for the Lenders (incorporated herein by reference to Exhibit 10.1 to AK Steel Holding Corporation’s Current Report on Form 8-K, as filed with the Commission on September 17, 2014).
10.14(c)Second Amendment to Amended and Restated Loan and Security Agreement, dated as of July 27, 2016, among AK Steel Corporation, as Borrower, AK Tube LLC and Mountain State Carbon, LLC, each as Borrowing Base Guarantors, certain financial institutions as the lenders party thereto and Bank of America, N.A., as agent for the Lenders (incorporated herein by reference to Exhibit 10.4 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended JuneSeptember 30, 2016,2017, as filed with the Commission on July 29, 2016)November 3, 2017).
   
10.14(d)Joinder to Amended and Restated Loan and Security Agreement, dated as of July 27, 2016, among AK Steel Corporation, Mountain State Carbon, LLC and Bank of America, N.A., as agent for the Lenders (incorporated herein by reference to Exhibit 10.5 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2016, as filed with the Commission on July 29, 2016).
10.15 Air Quality Facilities Loan Agreement dated as of February 1, 2012 between AK Steel Corporation and the Ohio Air Quality Development Authority - $36,000,000 Revenue Refunding Bonds, Series 2012-A (incorporated herein by reference to Exhibit 10.1 to AK Steel Holding Corporation’s Current Report on Form 8-K, as filed with the Commission on February 7, 2012).
   
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10.15(a)
Exhibit
Number
 Description 
 Guaranty Agreement dated as of April 29, 2014, by AK Tube LLC and AK Steel Properties, Inc. to Wells Fargo Bank, National Association, as trustee, pertaining to the Ohio Air Quality Development Authority - $36,000,000 Revenue Refunding Bonds, Series 2012-A (incorporated by reference to Exhibit 10.7 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2014, as filed with the Commission on May 2, 2014).
   
10.15(b) Guaranty Agreement, dated as of July 27, 2016, by Mountain State Carbon, LLC to Wells Fargo Bank, National Association, as trustee, pertaining to the Ohio Air Quality Development Authority – $36,000,000 Revenue Refunding Bonds, Series 2012-A (incorporated herein by reference to Exhibit 10.8 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2016, as filed with the Commission on July 29, 2016).
   
10.16 Loan Agreement dated as of February 1, 2012 between AK Steel Corporation and the City of Rockport, Indiana - $30,000,000 Revenue Refunding Bonds, Series 2012-A (incorporated herein by reference to Exhibit 10.2 to AK Steel Holding Corporation’s Current Report on Form 8-K, as filed with the Commission on February 7, 2012).
   
10.16(a) Guaranty Agreement dated as of April 29, 2014, by AK Tube LLC and AK Steel Properties, Inc. to Wells Fargo Bank, National Association, as trustee, pertaining to City of Rockport, Indiana - $30,000,000 Revenue Refunding Bonds, Series 2012-A (incorporated by reference to Exhibit 10.8 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2014, as filed with the Commission on May 2, 2014).
   
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Exhibit10.13(b)
Number
 Description 
10.16(b) Guaranty Agreement, dated as of July 27, 2016, by Mountain State Carbon, LLC to Wells Fargo Bank, National Association, as trustee, pertaining to City of Rockport, Indiana – $30,000,000 Revenue Refunding Bonds, Series 2012-A (incorporated herein by reference to Exhibit 10.9 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2016, as filed with the Commission on July 29, 2016).
   
10.17 Loan Agreement dated as of February 1, 2012 between AK Steel Corporation and the Butler County Industrial Development Authority - $7,300,000 Revenue Refunding Bonds, Series 2012-A (incorporated herein by reference to Exhibit 10.3 to AK Steel Holding Corporation’s Current Report on Form 8-K, as filed with the Commission on February 7, 2012).
   
10.17(a) Guaranty Agreement dated as of April 29, 2014, by AK Tube LLC and AK Steel Properties, Inc. to Wells Fargo Bank, National Association, as trustee, pertaining to Butler County Industrial Development Authority - $7,300,000 Revenue Refunding Bonds, Series 2012-A (incorporated by reference to Exhibit 10.9 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2014, as filed with the Commission on May 2, 2014).
   
10.17(b) Guaranty Agreement, dated as of July 27, 2016, by Mountain State Carbon, LLC to Wells Fargo Bank, National Association, as trustee, pertaining to Butler County Industrial Development Authority – $7,300,000 Revenue Refunding Bonds, Series 2012-A (incorporated herein by reference to Exhibit 10.10 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2016, as filed with the Commission on July 29, 2016).
   
10.18 Security Agreement, dated as of June 20, 2016, among the AK Steel Corporation and U.S. Bank National Association, as trustee and collateral agent (incorporated herein by reference to Exhibit 10.1 to AK Steel Holding Corporation’s Current Report on Form 8-K, as filed with the Commission on June 20, 2016).
   
10.18(a) Security Agreement Supplement, dated as of July 27, 2016, between Mountain State Carbon, LLC and U.S. Bank National Association, as collateral agent (incorporated herein by reference to Exhibit 10.6 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2016, as filed with the Commission on July 29, 2016).
   
10.19 Collateral Trust Agreement dated as of November 20, 2012, among AK Steel and U.S. Bank National Association, as trustee and collateral agent (incorporated by reference to Exhibit 10.4 to AK Steel Holding Corporation’s Current Report on Form 8-K, as filed with the Commission on November 20, 2012).
   
10.19(a) Supplement to Collateral Trust Agreement dated as of April 29, 2014, among AK Steel Corporation, AK Tube LLC, AK Steel Properties, Inc. and U.S. Bank National Association, as trustee and collateral agent (incorporated by reference to Exhibit 10.6 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2014, as filed with the Commission on May 2, 2014).
   
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10.19(b)
Exhibit
Number
 Description 
 Collateral Trust Agreement Joinder, dated as of June 20, 2016, among AK Steel Corporation and U.S. Bank National Association, as trustee and collateral agent (incorporated herein by reference to Exhibit 10.2 to AK Steel Holding Corporation’s Current Report on Form 8-K, as filed with the Commission on June 20, 2016).
   
10.19(c) Supplement to Collateral Trust Agreement, dated as of July 27, 2016, among AK Steel Corporation, Mountain State Carbon, LLC and U.S. Bank National Association, as collateral agent (incorporated herein by reference to Exhibit 10.7 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2016, as filed with the Commission on July 29, 2016).
   
10.20+ Form of Director and Officer Indemnification Agreement (incorporated by reference to Exhibit 10.1 to AK Steel Holding Corporation’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2013, as filed with the Commission on November 1, 2013).
   
10.21 Membership Interest Purchase Agreement, dated July 18, 2014, by andJune 30, 2017, among Severstal ColumbusPPHC Holdings, LLC, Severstal Dearborn,Drive Merger Sub, LLC, and AK Steel Corporation and PPHC Members’ Representative, LLC (incorporated herein by reference to Exhibit 2.1 to AK Steel Holding Corporation’s Current Report on Form 8-K, as filed with the Commission on July 22, 2014)7, 2017).
   
 Statement re: Computation of Ratio of Earnings to Combined Fixed Charges.
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Exhibit
Number
 Description 
   
 Statement re: Computation of Ratio of Earnings to Fixed Charges.
   
 Subsidiaries of AK Steel Holding Corporation (incorporated by reference to Exhibit 21.1 to AK Steel Holding Corporation’s Annual Report on Form 10-K for the year ended December 31, 2015, as filed with the Commission on February 19, 2016).Corporation.
   
 Consent of Ernst & Young LLP.
   
 Section 302 Certification of Chief Executive Officer.
   
 Section 302 Certification of Chief Financial Officer.
   
 Section 906 Certification of Chief Executive Officer.
   
 Section 906 Certification of Chief Financial Officer.
   
 Mine Safety Disclosure.
   
101.Ins XBRL Instance Document – the XBRL Instance Document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
   
*101.Sch XBRL Taxonomy Extension Schema Document
   
*101.Cal XBRL Taxonomy Extension Calculation Linkbase Document
   
*101.Def XBRL Taxonomy Extension Definition Linkbase Document
   
*101.Lab XBRL Taxonomy Extension Label Linkbase Document
   
*101.Pre XBRL Taxonomy Extension Presentation Linkbase Document
   
* Filed or furnished herewith, as applicable
+ Management contract or compensatory plan or arrangement
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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this Report to be signed on its behalf by the undersigned, thereunto duly authorized in West Chester, Ohio, on February 17, 2017.15, 2018.
   AK Steel Holding Corporation
   (Registrant)
    
   /s/ Jaime Vasquez
   Jaime Vasquez
   Vice President, Finance and Chief Financial Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this Report has been signed below as of February 17, 201715, 2018 by the following persons on behalf of the registrant and in the capacities indicated.
Signature & Title Signature & Title
   
/s/ Dr. James A. Thomson /s/ William K. Gerber
Dr. James A. Thomson William K. Gerber
Chairman of the Board Director
   
/s/ Roger K. Newport /s/ Robert H. JenkinsGregory B. Kenny
Roger K. Newport Robert H. JenkinsGregory B. Kenny
Chief Executive Officer and Director Director
   
/s/ Jaime Vasquez /s/ Gregory B. KennyRalph S. Michael, III
Jaime Vasquez Gregory B. KennyRalph S. Michael, III
Vice President, Finance and Chief Financial Officer Director
   
/s/ Gregory A. Hoffbauer /s/ Ralph S. Michael, IIIDwayne A. Wilson
Gregory A. Hoffbauer Ralph S. Michael, IIIDwayne A. Wilson
Vice President, Controller and Chief Accounting Officer Director
   
/s/ Dennis C. Cuneo /s/ Dwayne A. WilsonVicente Wright
Dennis C. Cuneo Dwayne A. WilsonVicente Wright
Director Director
   
/s/ Sheri H. Edison /s/ Vicente WrightArlene M. Yocum
Sheri H. Edison Vicente WrightArlene M. Yocum
Director Director
   
/s/ Mark G. Essig /s/ Arlene M. Yocum
Mark G. Essig Arlene M. Yocum
Director Director
   

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