10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_________________________________________________________________________

Form 10-K

þ	ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended December 31, 2017
OR
o	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

(Commission File Number) 001-32410

CELANESE CORPORATION

(Exact Name of Registrant as Specified in its Charter)

Delaware (State or Other Jurisdiction of Incorporation or Organization)	98-0420726 (I.R.S. Employer Identification No.)
222 West Las Colinas Blvd., Suite 900N, Irving, TX (Address of Principal Executive Offices)	75039-5421 (Zip Code)

(972) 443-4000

(Registrant's telephone number, including area code)

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

Title of Each Class	Name of Each Exchange on Which Registered
Series A Common Stock, par value $0.0001 per share	New York Stock Exchange
3.250% Senior Notes due 2019	New York Stock Exchange
1.125% Senior Notes due 2023	New York Stock Exchange
1.250% Senior Notes due 2025	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 þ     No o

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

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 þ    No o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).  Yes þ    No o

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

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

Large accelerated filer  þ Accelerated filer  o Non-accelerated filer  o Smaller reporting company  o Emerging growth company  o

(Do not check if a smaller reporting 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 Section 13(a) of the Exchange Act. o

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

The aggregate market value of the registrant's Series A Common Stock held by non-affiliates as of June 30, 2017 (the last business day of the registrants' most recently completed second fiscal quarter) was $13,017,711,601.

The number of outstanding shares of the registrant's Series A Common Stock, $0.0001 par value, as of February 2, 2018 was 135,817,634.

DOCUMENTS INCORPORATED BY REFERENCE

Certain portions of the registrant's Definitive Proxy Statement relating to the 2018 annual meeting of stockholders, to be filed with the Securities and Exchange Commission, are incorporated by reference into Part III.

CELANESE CORPORATION

Form 10-K

For the Fiscal Year Ended December 31, 2017

TABLE OF CONTENTS

		Page
Special Note Regarding Forward-Looking Statements		3
	PART I
Item 1.	Business	4
Item 1A.	Risk Factors	18
Item 1B.	Unresolved Staff Comments	28
Item 2.	Properties	28
Item 3.	Legal Proceedings	30
Item 4.	Mine Safety Disclosures	30
	Executive Officers of the Registrant	30
	PART II
Item 5.	Market for the Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	32
Item 6.	Selected Financial Data	35
Item 7.	Management's Discussion and Analysis of Financial Condition and Results of Operations	36
Item 7A.	Quantitative and Qualitative Disclosures About Market Risk	59
Item 8.	Financial Statements and Supplementary Data	60
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	61
Item 9A.	Controls and Procedures	61
Item 9B.	Other Information	61
	PART III
Item 10.	Directors, Executive Officers and Corporate Governance	62
Item 11.	Executive Compensation	62
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	63
Item 13.	Certain Relationships and Related Transactions, and Director Independence	63
Item 14.	Principal Accounting Fees and Services	63
	PART IV
Item 15.	Exhibits and Financial Statement Schedules	64
Signatures		65

2

Special Note Regarding Forward-Looking Statements

Certain statements in this Annual Report on Form 10-K ("Annual Report") or in other materials we have filed or will file with the Securities and Exchange Commission ("SEC"), and incorporated herein by reference, are forward-looking in nature as defined in Section 27A of the Securities Act of 1933, as amended, Section 21E of the Securities Exchange Act of 1934, as amended, and the Private Securities Litigation Reform Act of 1995. You can identify these statements by the fact that they do not relate to matters of a strictly factual or historical nature and generally discuss or relate to forecasts, estimates or other expectations regarding future events. Generally, the words "believe," "expect," "intend," "estimate," "anticipate," "project," "plan," "may," "can," "could," "might," "will" and similar expressions identify forward-looking statements, including statements that relate to such matters as planned and expected capacity increases and utilization rates; anticipated capital spending; environmental matters; legal proceedings; sources of raw materials and exposure to, and effects of hedging of raw material and energy costs and foreign currencies; interest rate fluctuations; global and regional economic, political, business and regulatory conditions; expectations, strategies, and plans for individual assets and products, business segments, as well as for the whole Company; cash requirements and uses of available cash; financing plans; pension expenses and funding; anticipated restructuring, divestiture, and consolidation activities; planned construction or operation of facilities; cost reduction and control efforts and targets and integration of acquired businesses.

Forward-looking statements are not historical facts or guarantees of future performance but instead represent only our beliefs at the time the statements were made regarding future events, which are subject to significant risks, uncertainties, and other factors, many of which are outside of our control and certain of which are listed above. Any or all of the forward-looking statements included in this Annual Report and in any other materials incorporated by reference herein may turn out to be materially inaccurate. This can occur as a result of incorrect assumptions, in some cases based upon internal estimates and analyses of current market conditions and trends, management plans and strategies, economic conditions, or as a consequence of known or unknown risks and uncertainties. Many of the risks and uncertainties mentioned in this Annual Report, such as those discussed in Item 1A. Risk Factors,Item 3. Legal ProceedingsandItem 7. Management's Discussion and Analysis of Financial Condition and Results of Operations will be important in determining whether these forward-looking statements prove to be accurate. Consequently, neither our stockholders nor any other person should place undue reliance on our forward-looking statements and should recognize that actual results may differ materially from those anticipated by us.

All forward-looking statements made in this Annual Report are made as of the date hereof, and the risk that actual results will differ materially from expectations expressed in this Annual Report will increase with the passage of time. We undertake no obligation, and disclaim any duty, to publicly update or revise any forward-looking statements, whether as a result of new information, future events, changes in our expectations or otherwise. However, we may make further disclosures regarding future events, trends and uncertainties in our subsequent reports on Forms 10-K, 10-Q and 8-K to the extent required under the Exchange Act. The above cautionary discussion of risks, uncertainties and possible inaccurate assumptions relevant to our business includes factors we believe could cause our actual results to differ materially from expected and historical results. Other factors beyond those listed above or in Item 1A. Risk Factors, Item 3. Legal ProceedingsandItem 7. Management's Discussion and Analysis of Financial Condition and Results of Operationsbelow, including factors unknown to us and factors known to us which we have determined not to be material, could also adversely affect us.

3

Item 1. Business

Basis of Presentation

In this Annual Report on Form 10-K, the term "Celanese" refers to Celanese Corporation, a Delaware corporation, and not its subsidiaries. The terms "Company," "we," "our" and "us" refer to Celanese and its subsidiaries on a consolidated basis. The term "Celanese US" refers to the Company's subsidiary, Celanese US Holdings LLC, a Delaware limited liability company, and not its subsidiaries.

Industry

This Annual Report on Form 10-K includes industry data obtained from industry publications and surveys as well as our own internal company surveys. Third-party industry publications, surveys and forecasts generally state that the information contained therein has been obtained from sources believed to be reliable.

Overview

We are a global technology and specialty materials company. We are a leading global producer of high performance engineered polymers that are used in a variety of high-value applications, as well as one of the world's largest producers of acetyl products, which are intermediate chemicals, for nearly all major industries. As a recognized innovator in the chemicals industry, we engineer and manufacture a wide variety of products essential to everyday living. Our broad product portfolio serves a diverse set of end-use applications including automotive, chemical additives, construction, consumer and industrial adhesives, consumer and medical, energy storage, filtration, food and beverage, paints and coatings, paper and packaging, performance industrial and textiles. Our products enjoy leading global positions due to our differentiated business models, large global production capacity, operating efficiencies, proprietary technology and competitive cost structures.

Our large and diverse global customer base primarily consists of major companies across a broad array of industries. We hold geographically balanced global positions and participate in diversified end-use applications. We combine a demonstrated track record of execution, strong performance built on differentiated business models and a clear focus on growth and value creation. Known for operational excellence, reliability and execution of our business strategies, we partner with our customers around the globe to deliver best-in-class technologies and solutions.

Celanese's history began in 1918, the year that its predecessor company, The American Cellulose & Chemical Manufacturing Company, was incorporated. The company, which manufactured cellulose acetate, was founded by Swiss brothers Drs. Camille and Henri Dreyfus. Since that time, the Company has transformed into a leading global technology and specialty materials company. The current Celanese was incorporated in 2004 under the laws of the State of Delaware and is a US-based public company traded on the New York Stock Exchange under the ticker symbol CE.

Headquartered in Irving, Texas, our operations are primarily located in North America, Europe and Asia and consist of 31 global production facilities and an additional 9 strategic affiliate production facilities. As of December 31, 2017, we employed 7,592 people worldwide.

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Business Segment Overview

We are organized around two complementary cores, Materials Solutions and the Acetyl Chain. Together, these two value drivers share raw materials, technology, integrated systems and research resources to increase efficiency and quickly respond to market needs. Within Materials Solutions and the Acetyl Chain, we operate principally through four business segments: Materials Solutions includes Advanced Engineered Materials and Consumer Specialties business segments (which includes our cellulose derivatives business), and the Acetyl Chain includes Industrial Specialties and Acetyl Intermediates business segments.

In Advanced Engineered Materials we leverage our proprietary opportunity pipeline model and bolt-on acquisitions to drive growth. In Consumer Specialties we have signed an agreement with The Blackstone Group L.P. (the "Blackstone Entities") to combine our cellulose derivatives assets in a joint venture to create incremental value for customers and shareholders, as further discussed below. Materials Solutions also includes certain strategic affiliates in both business segments.

In the Acetyl Chain, we create value by dynamically optimizing our global commercial and operational choices to deliver maximum profitability. Due to our geographic breadth, our net sales are balanced across global regions. See Business Segments below and Note 26 - Segment Information in the accompanying consolidated financial statements for further information.

Business Segments

Advanced Engineered Materials

Products	Major End-Use Applications	Principal Competitors	Key Raw Materials
• Polyoxymethylene ("POM") • Ultra-high molecular weight polyethylene ("UHMW-PE") • Polybutylene terephthalate     ("PBT") • Long-fiber reinforced thermoplastics ("LFRT") • Liquid crystal polymers ("LCP") • Thermoplastic elastomers ("TPE") • Nylon compounds or formulations • Polypropylene compounds or formulations	•  Automotive •  Medical •  Industrial •  Energy storage •  Consumer electronics •  Appliances •  Filtration equipment • Telecommunications	• BASF SE • E. I. du Pont de Nemours and Company • Koninklijke DSM N.V. • SABIC Innovative Plastics • Solvay S.A. Other regional competitors: • Asahi Kasei Corporation • Braskem S.A. • Lanxess AG • Mitsubishi Gas Chemical Company, Inc. • Sumitomo Corporation • Teijin Limited • Toray Industries, Inc.	• Formaldehyde (for POM) • Ethylene (for UHMW-PE and TPE) • Polypropylene (for LFRT) • Fibers (for LFRT) • Acetic anhydride (for LCP) • Propylene (for TPE) • Styrene (for TPE) • Butadiene (for TPE) • PA6 (for nylon) • PA66 (for nylon)

• Overview

Our Advanced Engineered Materials segment includes our engineered materials business and certain strategic affiliates. The engineered materials business leverages our leading project pipeline model to more rapidly commercialize projects. Our unique approach is based on deep customer engagement to develop new projects that are aligned with our skill domains to address critical customer needs and ensure our success and growth.

Advanced Engineered Materials is a project-based business where growth is driven by increasing new project commercializations from the pipeline. Our project pipeline model leverages competitive advantages that include our global assets and resources, marketplace presence, broad materials portfolio and differentiated capabilities. Our global assets and resources are represented by our operations, including polymerization, compounding, research and development, and customer technology centers in all regions of the world, including Brazil, China, Germany, Italy, Japan, Mexico, South Korea, the United Kingdom and the US, along with sites associated with our four strategic affiliates in Japan, Malaysia, Saudi Arabia, South Korea and the US.

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Our broad marketplace presence reflects our deep understanding of global and customer trends, including the growing global demand for more sophisticated vehicles, elevated environmental considerations, increased global connectivity, and improved health and wellness. These global trends drive a range of needed customer solutions, such as vehicle lightweighting, precise components, aesthetics and appearance, low emissions, heat resistance and low-friction for medical applications, that we are uniquely positioned to address with our materials portfolio. In addition, the opportunity pipeline process identifies a number of emerging trends early, enabling faster growth.

Our materials portfolio offers differentiated chemical and physical properties that enable them to perform in a variety of conditions. These include enduring a wide range of temperatures, resisting adverse chemical interactions and withstanding deformation. POM, PBT and LFRT are used in a broad range of performance-demanding applications, including fuel system components, automotive safety systems, consumer electronics, appliances, industrial products and medical applications. UHMW-PE is used in battery separators, industrial products, filtration equipment, coatings and medical applications. Primary end uses for LCP are electrical applications or products and consumer electronics. Thermoplastic elastomers offer unique attributes for use in automotive, appliances, consumer goods, electrical, electronic and industrial applications. Nylon compounds are used in a range of applications including automotive, consumer, electrical, electronic and industrial. These value-added applications in diverse end uses support the business' global growth objectives.

We also have several differentiated polymer technologies designed for the utility industry, the oil and gas industry, original equipment manufacturers and companies that enhance supply chain efficiency. These include composite technologies for the utility industry that deliver greater reliability, capacity and performance for utility transmission lines.

Our differentiated capabilities are highlighted in our intimate and unique customer engagement which allows us to work across the entirety of our customers' value chain. For example, in the automotive industry we work with original equipment manufacturers as well as system and tier suppliers and injection molders in numerous areas, including polymer formulation and functionality, part and structural design, mold design, color development, part testing and part processing. This broad access allows us to create a demand pull for our solutions. This business segment also includes four strategic affiliates that complement our global reach, improve our ability to capture growth opportunities in emerging economies and positions us as a leading participant in the global specialty polymers industry.

On February 1, 2018, we completed the acquisition of 100% of the ownership interests of Omni Plastics, L.L.C. and its subsidiaries ("Omni Plastics"). Omni Plastics specializes in custom compounding of various engineered thermoplastic materials. The acquisition further strengthens our global asset base by adding compounding capacity in the Americas. See Note 29 - Subsequent Events in the accompanying consolidated financial statements for further information.

On October 16, 2017, we announced plans to expand the capacity of our global compounding assets and certain product-specific manufacturing production sites to support the significant growth in our Advanced Engineered Materials segment. We expect these new production lines and expansions to add approximately 50-60kt per year in compounding capacity. We also expect the debottlenecking of existing global production lines to provide an additional 10-15kt per year capacity of compounded material production capability and an additional 10-15kt per year of capacity to LFRT production lines. We expect a new production line to add approximately 15kt of GUR^® UHMW-PE product capacity. These projects are expected to be completed in the 2018 - 2019 time frame.

On May 3, 2017, we acquired the nylon compounding division of Nilit Group, an independent producer of high performance nylon, resins, fibers and compounds. We acquired the nylon compounding product portfolio, customer agreements and manufacturing, technology and commercial facilities. See Note 4 - Acquisitions, Dispositions and Plant Closures in the accompanying consolidated financial statements for further information.

• Key Products

POM. Commonly known as polyacetal in the chemical industry, POM is sold by our engineered materials business under the trademarks Celcon^® and Hostaform^®. POM is used for diverse end-use applications in the automotive, industrial, consumer and medical industries. These applications include mechanical parts in automotive fuel system components and window lift systems, water handling, conveyor belts, sprinkler systems, drug delivery systems and gears in large and small home appliances.

We continue to innovate and broaden the portfolio of Celcon^® and Hostaform^® in order to support the industry needs for higher performing polyacetal. We have expanded our portfolio to include products with higher impact resistance and stiffness, low emissions, improved wear resistance and enhanced appearance such as laser marking and metallic effects.

6

Polyplastics Co., Ltd., our 45%-owned strategic affiliate ("Polyplastics"), and Korea Engineering Plastics Co., Ltd., our 50%-owned strategic affiliate ("KEPCO"), also manufacture POM and other engineering resins in the Asia-Pacific region.

The primary raw material for POM is formaldehyde, which is manufactured from methanol. Raw materials are sourced from internal production and from third parties, generally through long-term contracts.

UHMW-PE. Celanese is a global leader in UHMW-PE products which are sold under the trademark GUR^®. Theyare highly engineered thermoplastics designed for a variety of industrial, consumer and medical applications. Primary applications for the material include lead acid battery separators, heavy machine components, lithium ion separator membranes, and noise and vibration dampening tapes. Several specialty grades are also produced for applications in high performance filtration equipment, ballistic fibers, thermoplastic and elastomeric additives, as well as medical implants.

Polyesters. Our products include a series of thermoplastic polyesters including Celanex^® PBT, Impet^® PET (polyethylene terephthalate) and Thermx^® PCT (polycyclohexylene-dimethylene terephthalate), as well as Riteflex^®, a thermoplastic polyester elastomer. These products are used in a wide variety of automotive, electrical and consumer applications, including ignition system parts, radiator grilles, electrical switches, appliance and sensor housings, light emitting diodes and technical fibers.

LFRT. Celstran^® and Factor^®, our LFRT products,impart extra strength and stiffness, making them more suitable for larger parts than conventional thermoplastics. These products are used in automotive, transportation and industrial applications, such as instrument panels, consoles and front end modules. LFRTs meet a wide range of end-user requirements and are excellent candidates for metal replacement where they provide the required structural integrity with significant weight reduction, corrosion resistance and the potential to lower manufacturing costs.

LCP. Vectra^® and Zenite^®, our LCP brands, are primarily used in electrical and electronics applications for precision parts with thin walls and complex shapes and applications requiring heat dissipation. They are also used in high heat cookware applications.

TPE.Forprene^®, Sofprene^® T, Pibiflex^® and Laprene^®, our TPE brands, are primarily used in automotive, construction, appliances and consumer applications due to their ability to combine the advantages of both flexible and plastic materials. These materials are selected for their ability to stretch and return to their near original shape creating a longer life and better physical range than other materials.

Nylon.Our nylon products include Nylfor^® A (PA 6.6), Nylfor^® B (PA 6), Nilamid^® (PA 6, PA 66, PPA), Frianyl^® (flame retardant PA 6, PA 66, PPA compounds) and Ecomid^® (recycled polyamide) and are used in automotive, appliances, industrial and consumer applications due to their mechanical properties, high impact resistance, resistance to organic solvents, high wear and fatigue resistance even at high temperatures, and easy processing and molding.

Polypropylene.Our polypropylene products include Polifor^®, Litepol^® and Tecnoprene^® and are primarily used in automotive, appliances, electrical and consumer applications due to their high impact and fatigue resistance, exceptional rigidity at high temperatures and an ability to withstand chemical agents.

• Geographic Regions

Net sales by destination for the Advanced Engineered Materials segment by geographic region are as follows:

	Year Ended December 31,
	2017			2016			2015
	(In $ millions, except percentages)
North America	575	28	%	511	35	%	496	37	%
Europe and Africa	1,007	48	%	564	39	%	526	40	%
Asia-Pacific	447	21	%	332	23	%	266	20	%
South America	67	3	%	37	3	%	38	3	%
Total	2,096	100	%	1,444	100	%	1,326	100	%

7

• Customers

Advanced Engineered Materials' principal customers are original equipment manufacturers and their suppliers serving the automotive, medical, industrial and consumer industries. We utilize our customer options mapping process to collaborate with our customers to identify customized solutions that leverage our broad range of polymers and technical expertise. Our engineered materials business has long-standing relationships and multi-year arrangements with many of its major customers and utilizes distribution partners to expand its customer base.

As Advanced Engineered Materials is a project-based business focused on solutions, the pricing of products in this segment is primarily based on the value-in-use and is largely independent of changes in the cost of raw materials. Therefore, in general, margins may expand or contract in response to changes in raw material costs in the short-term.

Consumer Specialties

Products	Major End-Use Applications	Principal Competitors	Key Raw Materials
Cellulose derivatives
•  Acetate tow •  Acetate flake	•  Filtration •  Films •  Flexible packaging	•  Daicel Corporation • Eastman Chemical Company •  Mitsubishi Rayon Co., Ltd •  Blackstone Rhodia	• Wood pulp • Acetic acid • Acetic anhydride
Food ingredients
•  Acesulfame potassium ("Ace-K") •  Potassium sorbate •  Sorbic acid	•  Beverages •  Confections •  Baked goods	• Anhui Jinhe Industry Co., Ltd. • Suzhou Hope Technology Co., Ltd. • Ajinomoto Co. Inc. • The NutraSweet Company • Tate & Lyle plc • Daicel Corporation • Nantong Acetic Acid Chemical Co., Ltd.	• Diketene (for Ace-K) For potassium sorbate and sorbic acid: • Acetic acid • Crotonaldehyde • Ethylene • Potassium hydroxide

• Overview

The Consumer Specialties segment includes our cellulose derivatives and food ingredients businesses, which serve consumer-driven applications.

Our cellulose derivatives business is a leading global producer and supplier of acetate tow and acetate flake, primarily used in filter products applications. We hold an approximately 30% ownership interest in three separate ventures in China that produce acetate flake and acetate tow. China National Tobacco Corporation, a Chinese state-owned tobacco entity, has been our venture partner for over three decades. Our cellulose derivatives business has production sites in Belgium, Mexico and the US, along with sites at our three cellulose derivatives strategic affiliates in China.

On June 18, 2017, Celanese, through various subsidiaries, entered into an agreement with affiliates of the Blackstone Entities to form a joint venture which combines substantially all of the operations of our cellulose derivatives business and the operations of the Rhodia Acetow cellulose acetate business formerly operated by Solvay S.A. and acquired by the Blackstone Entities on June 1, 2017. The combined business will operate under a common governance structure through two separate joint ventures, each of which will be owned ultimately 70% and 30% by Celanese and the Blackstone Entities, respectively. See Note 4 - Acquisitions, Dispositions and Plant Closures in the accompanying consolidated financial statements for further information. We have received regulatory approval in four out of six jurisdictions requiring approval, and the European Commission ("EC") has moved into its Phase II investigation of the ongoing merger review process. Under the standard review process of a Phase II investigation, we received a statement of objections from the EC. This statement of objections sets out the provisional position of the EC and does not prejudge the final outcome of the case.

8

Our food ingredients business is a leading global supplier of Ace-K for the food and beverage industry and is a leading producer of food protection ingredients, such as potassium sorbate and sorbic acid. Similar to engineered materials, we leverage our leading project pipeline process in our food ingredients business. We have over fifty years of experience in developing and marketing specialty ingredients for the food and beverage industry and are the only western producer of Ace-K. Our food ingredients business has a production facility in Germany, with sales and distribution facilities in all major regions of the world.

• Key Products

Acetate tow and acetate flake. Acetate tow is a fiber used primarily in cigarette filters. In order to produce acetate tow, we first produce acetate flake by processing wood pulp with acetic acid and acetic anhydride. Wood pulp generally comes from reforested trees and is purchased externally from a variety of sources, and acetic anhydride is an intermediate chemical that we produce from acetic acid in our Acetyl Intermediates segment. Acetate flake is then further processed into acetate tow.

Sales of acetate tow amounted to 10%, 14% and 14% of our consolidated net sales for the years ended December 31, 2017, 2016 and 2015, respectively.

Sunett^® sweetener. Ace-K, a non-nutritive high intensity sweetener sold under the trademark Sunett^®, is used in a variety of beverages, confections and dairy products throughout the world. Sunett^® sweetener is the ideal blending partner for caloric and non-caloric sweeteners as it balances the sweetness profile. It is recognized in the food industry for its consistent product quality and reliable supply. The primary raw material for Sunett is diketene.

Food protection ingredients. Our food protection ingredients, potassium sorbate and sorbic acid, are mainly used in foods, beverages and personal care products.

• Geographic Regions

Net sales by destination for the Consumer Specialties segment by geographic region are as follows:

	Year Ended December 31,
	2017			2016			2015
	(In $ millions, except percentages)
North America	168	22	%	175	19	%	183	19	%
Europe and Africa	340	43	%	457	49	%	476	49	%
Asia-Pacific	228	29	%	248	27	%	255	26	%
South America	47	6	%	49	5	%	55	6	%
Total(1)	783	100	%	929	100	%	969	100	%

___________________________

⁽¹⁾  Excludes intersegment sales of $2 million, $0 million and $0 million for the years ended December 31, 2017, 2016 and 2015, respectively.

• Customers

Acetate tow is sold principally to the major tobacco companies that account for a majority of worldwide cigarette production. Contracts with most of our customers are generally entered into on an annual or multi-year basis. Our food ingredients business primarily sells Sunett^® sweetener to a limited number of large multinational and regional customers in the food and beverage industry under long-term and annual contracts. Food protection ingredients are primarily sold through regional distributors to small and medium sized customers and directly to large multinational customers in the food industry.

The pricing of products within the cellulose derivatives and food ingredients businesses is sensitive to demand and is primarily based on the value-in-use. Many sales in these businesses are conducted under contracts with pricing for one or more years. As a result, margins may expand or contract in response to changes in raw material costs over these similar periods, and we may be unable to adjust pricing in the short to medium term due to other factors, such as the intense level of competition in the industry.

9

• Competition

On November 13, 2017, we obtained a preliminary injunction against a European distributor of Ace-K, preventing the distributor from continuing to sell infringing Ace-K sweetener.

Industrial Specialties

Products	Major End-Use Applications	Principal Competitors	Key Raw Materials
Emulsion polymers
• Conventional emulsions • Vinyl acetate ethylene ("VAE") emulsions	• Paints • Coatings • Adhesives • Textiles • Paper finishing	• BASF SE • Dairen Chemical Corporation • The Dow Chemical Company • Wacker Chemie AG	• Vinyl acetate monomer ("VAM") • Ethylene • Acrylate esters • Styrene
EVA polymers
• Ethylene vinyl acetate ("EVA") resins and compounds • Low-density polyethylene resins ("LDPE")	• Flexible packaging • Lamination products • Automotive parts • Hot melt adhesives	• Arkema • E. I. du Pont de Nemours and Company • ExxonMobil Chemical	• VAM • Ethylene

• Overview

The Industrial Specialties segment, which includes our emulsion polymers and EVA polymers businesses, is active in every major global industrial sector and serves diverse consumer end-use applications. These include traditional vinyl-based end uses, such as paints and coatings and adhesives, as well as other unique, high-value end uses including flexible packaging, thermal laminations, wire and cable, and compounds.

Our emulsion polymers business is a leading global producer of vinyl acetate-based emulsions and develops products and application technologies to improve performance, create value and drive innovation in applications such as paints and coatings, adhesives, construction, glass fiber, textiles and paper. Our emulsion polymers products are sold under globally and regionally recognized brands including EcoVAE^®, Mowilith^®, Vinamul^®, Celvolit^®, Duroset^®, TufCOR^® and Avicor^®. The emulsion polymers business has production facilities in Canada, China, Germany, the Netherlands, Singapore, Sweden and the US and is supported by expert technical service regionally.

Our EVA polymers business is a leading North American manufacturer of a full range of specialty EVA resins and compounds as well as select grades of LDPE. Sold under the Ateva^® and VitalDose^® brands, these products are used in many applications, including flexible packaging films, lamination film products, hot melt adhesives, automotive parts and carpeting. Our EVA polymers business has a production facility in Edmonton, Alberta, Canada.

The Industrial Specialties segment builds on our leading acetyl technology. We operate the Industrial Specialties segment as an extension of the acetyl products under the Acetyl Chain core. Our Acetyl Intermediates segment produces VAM, a primary raw material for our emulsion polymers and EVA polymers businesses. Ethylene, another key raw material, is purchased externally from a variety of sources through annual or multi-year contracts.

Our emulsion polymers business has experienced significant growth in Asia, and we have made investments to support continued growth in the region including production at our new VAE emulsions unit in Singapore, which will support growing demand for ecologically friendly materials in Southeast Asia. In addition to geographic growth, the Industrial Specialties businesses are focused on supporting our overall manufacturing footprint strategy to increase value, such as integrating our production sites to provide critical economies of scale.

10

• Key Products

Our emulsion polymers business produces conventional vinyl- and acrylate-based emulsions and VAE emulsions. VAE emulsions are a key component of water-based architectural coatings, adhesives, non-wovens, textiles, glass fiber and other applications. VAE emulsions are in high demand in Europe and Asia as they enable low VOC paints, specifically in interior paints.

Our EVA polymers business produces low-density polyethylene, EVA resins and compounds. Low-density polyethylene is produced in high-pressure reactors from ethylene, while EVA resins and compounds are produced in high-pressure reactors from ethylene and VAM.

• Geographic Regions

Net sales by destination for the Industrial Specialties segment by geographic region are as follows:

	Year Ended December 31,
	2017			2016			2015
	(In $ millions, except percentages)
North America	337	33	%	337	35	%	401	37	%
Europe and Africa	478	47	%	460	47	%	485	45	%
Asia-Pacific	188	18	%	165	17	%	180	17	%
South America	16	2	%	14	1	%	16	1	%
Total(1)	1,019	100	%	976	100	%	1,082	100	%

___________________________

⁽¹⁾  Excludes intersegment sales of $4 million, $3 million and $0 million for the years ended December 31, 2017, 2016 and 2015, respectively.

• Customers

Industrial Specialties' products are sold to a diverse group of regional and multinational customers. Customers of our emulsion polymers business are manufacturers of water-based paints and coatings, adhesives, paper, building and construction products, glass fiber, non-wovens and textiles. Customers of our EVA polymers business are engaged in the manufacture of a variety of products, including hot melt adhesives, automotive components, thermal laminations, and flexible and food packaging materials.

Pricing of our products within Industrial Specialties is influenced by changes in the cost of raw materials. Therefore, in general, there is a direct correlation between the cost of raw materials and our net sales for most Industrial Specialties products. This impact to pricing typically lags changes in raw material costs over months or quarters and impacts profit margins over those periods.

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Acetyl Intermediates

Products	Major End-Use Applications	Principal Competitors	Key Raw Materials
• Acetic acid • VAM • Acetic anhydride • Acetaldehyde • Ethyl acetate • Formaldehyde • Butyl acetate	•  Paints •  Coatings •  Adhesives •  Lubricants •  Pharmaceuticals •  Films •  Textiles •  Inks •  Plasticizers •  Solvents	• BASF SE • BP PLC • Chang Chun Petrochemical Co., Ltd. • Daicel Corporation • The Dow Chemical Company • Eastman Chemical Company • E. I. du Pont de Nemours and Company • Jiangsu Sopo (Group) Co., Ltd. • Kuraray Co., Ltd. • LyondellBasell Industries N.V. • Nippon Gohsei • Perstorp Inc. • Showa Denko K.K.	For acetic acid and VAM: • Carbon monoxide • Methanol • Ethylene For solvents and derivatives: • Methanol • Acetic acid

• Overview

Our Acetyl Intermediates segment includes our intermediate chemistry business, which produces and supplies acetyl products, including acetic acid, VAM, acetic anhydride and acetate esters, and operates under the Acetyl Chain core. These products are generally used as starting materials for colorants, paints, adhesives, coatings and pharmaceuticals. Our intermediate chemistry business also produces organic solvents and intermediates for pharmaceutical, agricultural and chemical products.

We have focused in recent years on enhancing our ability to drive incremental value through our global production network and productivity initiatives as well as proactively managing the intermediate chemistry business in response to trade flows and prevailing industry trends. Our intermediate chemistry business has production sites in China, Germany, Mexico, Singapore and the US. Our Acetyl Intermediates segment is a global industry leader, with a broad acetyls product portfolio, leading technology, low cost production footprint and a global supply chain. With decades of experience, advanced proprietary process technology and favorable capital and production costs, we are a leading global producer of acetic acid and VAM. AOPlus^®3 technology extends our historical technology advantage and enables us to construct a greenfield acetic acid facility with a capacity of 1.8 million metric tons at a lower capital cost than our competitors. Our VAntage^®2 technology could increase VAM capacity by up to 50% to meet growing customer demand globally with minimal investment. We believe our production technology is among the lowest cost in the industry and provides us with global growth opportunities through low cost expansions and a cost advantage over our competitors.

• Key Products

Acetyl Products. Acetyl products include acetic acid, VAM, acetic anhydride and acetaldehyde. Acetic acid is primarily used to manufacture VAM, purified terephthalic acid and other acetyl derivatives. VAM is used in a variety of adhesives, paints, films, coatings and textiles. Acetic anhydride is a raw material used in the production of cellulose acetate, detergents and pharmaceuticals. Acetaldehyde is a major feedstock for the production of a variety of derivatives, such as pyridines, which are used in agricultural products. We manufacture acetic acid, VAM and acetic anhydride for our own use in producing downstream, value-added products, as well as for sale to third parties.

Acetic acid and VAM, our basic acetyl intermediates products, leverage global supply and demand fundamentals. The principal raw materials in these products are carbon monoxide, which we generally purchase under long-term contracts, and methanol and ethylene, which we generally purchase under both annual and multi-year contracts. Generally, methanol and ethylene are commodity products available from a wide variety of sources, while carbon monoxide is typically purpose-made in close proximity.

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We have a joint venture, Fairway Methanol LLC ("Fairway"), with Mitsui & Co., Ltd., of Tokyo, Japan ("Mitsui"), in which we own a 50% interest, for the production of methanol at our integrated chemical plant in Clear Lake, Texas. The methanol unit utilizes natural gas in the US Gulf Coast region as a feedstock. Almost all of our North American methanol needs are met from our share of the production, as well as the long-term contract we have with our joint venture partner, Mitsui.

In 2015, we announced capacity expansions for our acetic acid and VAM facilities in Clear Lake, Texas. The expansions will provide an additional 150kt of product for both facilities. The expansion at our VAM facility will make it the largest and most efficient VAM plant in the world and is expected to be commissioned at the end of 2018.

Sales from acetyl products amounted to 27%, 29% and 31% of our consolidated net sales for the years ended December 31, 2017, 2016 and 2015, respectively.

Solvents and Derivatives. We manufacture a variety of solvents, formaldehyde and other chemicals, which in turn are used in the manufacture of paints, coatings, adhesives and other products. Many solvents and derivatives products are derived from our production of acetic acid. Primary products are:

• Ethyl acetate, an acetate ester that is a solvent used in coatings, inks and adhesives and in the manufacture of photographic films and coated papers;

• Butyl acetate, an acetate ester that is a solvent used in inks, pharmaceuticals and perfume;

• Formaldehyde and paraformaldehyde, which are primarily used to produce adhesive resins for plywood, particle board, coatings, POM engineering resins and a compound used in making polyurethane; and

• Other chemicals, such as crotonaldehyde, which are used by our food ingredients business for the production of sorbic acid and potassium sorbates, as well as raw materials for the fragrance and food ingredients industry.

Sales from solvents and derivatives products amounted to 9%, 9% and 10% of our consolidated net sales for the years ended December 31, 2017, 2016 and 2015, respectively.

• Geographic Regions

Net sales by destination for the Acetyl Intermediates segment by geographic region are as follows:

	Year Ended December 31,
	2017			2016			2015
	(In $ millions, except percentages)
North America	727	32	%	645	32	%	588	26	%
Europe and Africa	532	24	%	493	24	%	711	31	%
Asia-Pacific	911	41	%	833	41	%	932	40	%
South America	72	3	%	69	3	%	66	3	%
Total(1)	2,242	100	%	2,040	100	%	2,297	100	%

___________________________

⁽¹⁾  Excludes intersegment sales of $427 million, $401 million and $447 million for the years ended December 31, 2017, 2016 and 2015, respectively.

• Customers

Our intermediate chemistry business sells its products both directly to customers and through distributors. Acetic acid, VAM and acetic anhydride are global businesses, and we generally supply our customers under a mix of short- and long-term agreements. Acetic acid, VAM and acetic anhydride customers produce polymers used in water-based paints, adhesives, paper coatings, polyesters, film modifiers, pharmaceuticals, cellulose acetate and textiles. We have long-standing relationships with most of these customers.

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Solvents and derivatives are sold to a diverse group of regional and multinational customers under multi-year contracts and on the basis of long-standing relationships. Solvents and derivatives customers are primarily engaged in the production of paints, coatings and adhesives. We manufacture formaldehyde for our own use as well as for sale to a few regional customers that include manufacturers in the wood products and chemical derivatives industries. Specialty solvents are sold globally to a wide variety of customers, primarily in the coatings and resins and the specialty products industries. These products serve global regions in the synthetic lubricant, agrochemical, rubber processing and other specialty chemical areas.

Pricing of acetic acid, VAM and other acetyl products reflects changes in the cost of raw materials. Therefore, in general, there is a direct correlation between the cost of raw materials and our net sales for most intermediate chemistry products. This impact to pricing typically lags changes in raw material costs over months or quarters.

Other Activities

Other Activities primarily consists of corporate center costs, including administrative activities such as finance, information technology and human resource functions, interest income and expense associated with our financing activities and results of our captive insurance companies. Our two wholly-owned captive insurance companies are a key component of our global risk management program, as well as a form of self-insurance for our liability and workers compensation risks. The captive insurance companies retain risk at levels approved by management and obtain reinsurance coverage from third parties to limit the net risk retained. One of the captive insurance companies also insures certain third-party risks. Other Activities also includes the interest cost, expected return on assets and net actuarial gains and losses components of our net periodic benefit cost for our defined benefit pension plans and other postretirement plans, which are not allocated to our business segments. Ongoing merger, acquisition and integration related costs are also included in Other Activities.

Strategic Affiliates

Our strategic affiliates represent an important component of our strategy for accelerated growth and global expansion. We have a substantial portfolio of affiliates in various regions, including Asia-Pacific, North America and the Middle East. These affiliates, some of which date back as far as the 1960s, have sizeable operations and are significant within their industries.

With shared characteristics such as products, applications and manufacturing technology, these strategic affiliates complement and extend our technology and specialty materials portfolio. We have historically entered into these investments to gain access to local demand, minimize costs and accelerate growth in areas we believe have significant future business potential. Depending on the level of investment and other factors, we account for our strategic affiliates using either the equity method or cost method of accounting.

Our strategic affiliates contribute substantial earnings and cash flows to us. During the year ended December 31, 2017, our equity method strategic affiliates generated combined sales of $2.3 billion, resulting in our recording $157 million of equity in net earnings of affiliates and $96 million of dividends.

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Our strategic affiliatesas of December 31, 2017 are as follows:

	Location of Headquarters	Ownership	Partner(s)	Year Entered
Equity Method Investments
Advanced Engineered Materials
National Methanol Company	Saudi Arabia	25 %	Saudi Basic Industries Corporation (50%); Texas Eastern Arabian Corporation Ltd. (25%)	1981
KEPCO	South Korea	50 %	Mitsubishi Gas Chemical Company, Inc. (40%); Mitsubishi Corporation (10%)	1999
Polyplastics	Japan	45 %	Daicel Corporation (55%)	1964
Fortron Industries LLC	US	50 %	Kureha America Inc. (50%)	1992
Cost Method Investments
Consumer Specialties
Kunming Cellulose Fibers Co. Ltd.	China	30 %	China National Tobacco Corporation (70%)	1993
Nantong Cellulose Fibers Co. Ltd.	China	31 %	China National Tobacco Corporation (69%)	1986
Zhuhai Cellulose Fibers Co. Ltd.	China	30 %	China National Tobacco Corporation (70%)	1993

National Methanol Company (Ibn Sina). National Methanol Company represents approximately 1% of the world's methanol production capacity and is one of the world's largest producers of methyl tertiary-butyl ether, a gasoline additive. Its production facilities are located in Saudi Arabia. Saudi Basic Industries Corporation ("SABIC") is responsible for all product marketing. Methanol is a key feedstock for POM production and is produced by our Ibn Sina affiliate which provides an economic hedge against raw material costs in our engineered materials business.

Ibn Sina has constructed a 50,000 metric ton POM production facility in Saudi Arabia. The new facility will supply POM to support Advanced Engineered Materials' future growth plans as well as our venture partners' regional business development and was declared commercially operational in the fourth quarter of 2017. Upon successful startup of the POM facility, our indirect economic interest in Ibn Sina increased from 25% to 32.5%. SABIC's economic interest will remain unchanged.

KEPCO. KEPCO is the leading producer of POM in South Korea. KEPCO has polyacetal production facilities in Ulsan, South Korea, compounding facilities for PBT and nylon in Pyongtaek, South Korea, and participates with Polyplastics and Mitsubishi Gas Chemical Company, Inc. in a world-scale POM facility in Nantong, China.

Polyplastics. Polyplastics is a leading supplier of engineered plastics. Polyplastics is a manufacturer and/or marketer of POM, LCP and PPS, with principal production facilities located in Japan and Malaysia.

Fortron Industries LLC. Fortron Industries LLC ("Fortron") is a leading global producer of PPS, sold under the Fortron^® brand, which is used in a wide variety of automotive and other applications, especially those requiring heat and/or chemical resistance. Fortron's facility is located in Wilmington, North Carolina. This venture combines our sales, marketing, distribution, compounding and manufacturing expertise with the PPS polymer technology expertise of Kureha America Inc.

Cellulose derivatives strategic ventures. Our cellulose derivatives ventures within our Consumer Specialties segment generally fund their operations using operating cash flow and pay dividends based on each ventures' performance in the preceding year. In 2017, 2016 and 2015, we received cash dividends of $107 million, $107 million and $106 million, respectively.

Although our ownership interest in each of our cellulose derivatives ventures exceeds 20%, we account for these investments using the cost method of accounting because we determined that we cannot exercise significant influence over these entities due to local government investment in and influence over these entities, limitations on our involvement in the day-to-day operations and the present inability of the entities to provide timely financial information prepared in accordance with generally accepted accounting principles in the United States of America ("US GAAP").

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Other Equity Method Investments

InfraServs. We hold indirect ownership interests in several German InfraServ Groups that own and develop industrial parks and provide on-site general and administrative support to tenants. Our ownership interest in the equity investments in InfraServ affiliates are as follows:

	As of December 31, 2017
	(In percentages)
InfraServ GmbH & Co. Gendorf KG(1)	39
InfraServ GmbH & Co. Hoechst KG	32
InfraServ GmbH & Co. Knapsack KG(1)	27

______________________________

⁽¹⁾  See Note 29 - Subsequent Events in the accompanying consolidated financial statements for further information.

Research and Development

Our business models leverage innovation and conduct research and development activities to develop new, and optimize existing, production technologies, as well as to develop commercially viable new products and applications. Research and development expense was $72 million, $78 million and $119 million for the years ended December 31, 2017, 2016 and 2015, respectively. We consider the amounts spent during each of the last three fiscal years on research and development activities to be sufficient to execute our current strategic initiatives.

Intellectual Property

We attach importance to protecting our intellectual property, including safeguarding our confidential information and through our patents, trademarks and copyrights, in order to preserve our investment in research and development, manufacturing and marketing. Patents may cover processes, equipment, products, intermediate products and product uses. We also seek to register trademarks as a means of protecting the brand names of our Company and products.

Patents. In most industrial countries, patent protection exists for new substances and formulations, as well as for certain unique applications and production processes. However, we do business in regions of the world where intellectual property protection may be limited and difficult to enforce.

Confidential Information. We maintain stringent information security policies and procedures wherever we do business. Such information security policies and procedures include data encryption, controls over the disclosure and safekeeping of confidential information and trade secrets, as well as employee awareness training.

Trademarks. Amcel^®, AOPlus^®, Ateva^®, Avicor^®, Celanese^®, Celanex^®, Celcon^®, CelFX^®, Celstran^®, Celvolit^®, Clarifoil^®, Dur-O-Set^®, Ecomid^®, EcoVAE^®, Forflex^®, Forprene^®, FRIANYL^®, Fortron^®, GHR^®, Gumfit^®, GUR^®, Hostaform^®, Laprene^®, MetaLX^®, Mowilith^®, MT^®, NILAMID^®, Nivionplast^®, Nutrinova^®, Nylfor^®, Pibiflex^®, Pibifor^®, Pibiter^®, Polifor^®, Resyn^®, Riteflex^®, SlideX^®, Sofprene^®, Sofpur^®, Sunett^®, Talcoprene^®, Tecnoprene^®, Thermx^®, TufCOR^®, VAntage^®, Vectra^®, Vinac^®, Vinamul^®, VitalDose^®, Zenite^® and certain other branded products and services named in this document are registered or reserved trademarks or service marks owned or licensed by Celanese. The foregoing is not intended to be an exhaustive or comprehensive list of all registered or reserved trademarks and service marks owned or licensed by Celanese. Fortron^® is a registered trademark of Fortron Industries LLC. Hostaform^® is a registered trademark of Hoechst GmbH. Mowilith^® and NILAMID^® are registered trademarks of Celanese in most European countries.

We monitor competitive developments and defend against infringements on our intellectual property rights. Neither Celanese nor any particular business segment is materially dependent upon any one patent, trademark, copyright or trade secret.

Environmental and Other Regulation

Matters pertaining to environmental and other regulations are discussed in Item 1A. Risk Factors, as well as Note 2 - Summary of Accounting Policies, Note 16 - Environmental and Note 24 - Commitments and Contingencies in the accompanying consolidated financial statements.

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Employees

Our employees employed on a continuing basis throughout the world are as follows:

	Employees as of December 31, 2017
North America
US	2,608
Canada	242
Mexico	683
Total	3,533
Europe
Germany	1,556
Other Europe	1,293
Total	2,849
Asia	1,072
Rest of World	138
Total	7,592

Backlog

We do not consider backlog to be a significant indicator of the level of future sales activity. In general, we do not manufacture our products against a backlog of orders. Production and inventory levels are based on the level of incoming orders as well as projections of future demand. Therefore, we believe that backlog information is not material to understanding our overall business and should not be considered a reliable indicator of our ability to achieve any particular level of net sales or financial performance.

Available Information — Securities and Exchange Commission ("SEC") Filings and Corporate Governance Materials

We make available free of charge, through our internet website (http://www.celanese.com), 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, as well as ownership reports on Form 3 and Form 4, as soon as reasonably practicable after electronically filing such material with, or furnishing it to, the SEC. References to our website in this report are provided as a convenience, and the information on our website is not, and shall not be deemed to be a part of this report or incorporated into any other filings we make with the SEC. The SEC maintains a website that contains reports, proxy and information statements, and other information regarding issuers, including Celanese Corporation, that electronically file with the SEC at http://www.sec.gov.

We also make available free of charge, through our website, our Corporate Governance Guidelines of our Board of Directors and the charters of each of the standing committees of our Board of Directors.

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Item 1A.  Risk Factors

Many factors could have an effect on our financial condition, cash flows and resultsof operations. We are subject to various risks resulting from changing economic,environmental, political, industry, business, financial and regulatory conditions. The factorsdescribed below represent our principal risks.

Risks Related to Our Business

We are exposed to generaleconomic, political and regulatory conditions and risks in the countries in which wehave operations and customers.

We operate globally and have customers in many countries. Our major facilities are primarily located in North America, Europe and Asia, and we hold interests in affiliates that operate in the United States ("US"), Germany, China, Japan, Malaysia, South Korea and Saudi Arabia. Our principal customers are similarly global in scope and the prices of our most significant products are typically regional or world market prices. Consequently, our business and financial results are affected, directly and indirectly, by world economic conditions, including instability in credit markets, declining consumer and business confidence, fluctuating commodity prices and interest rates, volatile exchange rates and other challenges such as the changing regulatory environment.

Our operations are also subject to global political conditions. For example, any future withdrawal or renegotiation of trade agreements or the more aggressive prosecution of trade disputes with countries like China, may adversely affect our ability to operate our business and execute our growth strategy. In addition, it may be more difficult for us to enforce agreements, collect receivables, receive dividends and repatriate earnings through foreign legal systems. In certain foreign jurisdictions our operations are subject to nationalization and expropriation risk and some of our contractual relationships within these jurisdictions are subject to cancellation without full compensation for loss. Furthermore, in certain cases where we benefit from local government subsidies or other undertakings, such benefits are subject to the solvency of local government entities and are subject to termination without meaningful recourse or remedies.

We have invested significant resources in China and other Asian countries. This region's growth may slow, and we may fail to realize the anticipated benefits associated with our investment there and, consequently, our financial results may be adversely impacted.

In addition, we have significant operations and financial relationships based in Europe. Historically sales originating in Europe have accounted for over one-third of our net sales. For example, in 2017, sales originating in Europe accounted for approximately 40% of our net sales. Adverse conditions in the European economy related to the United Kingdom's exit from the European Union ("EU") membership or otherwise may negatively impact our overall financial results due to reduced economic growth and resulting in decreased end-use customer demand.

We are subject to risks associated with the increased volatility in the prices andavailability of key raw materials and energy, which could have a significant adverse effect on the margins of our products and our financial results.

We purchase significant amounts of ethylene, methanol, carbon monoxide and natural gas from third parties primarily for use in our production of basic chemicals in the Acetyl Intermediates segment, principally acetic acid, vinyl acetate monomer ("VAM") and formaldehyde. We use a portion of our output of these chemicals, in turn, as inputs in the production of downstream products in all of our business segments. We also purchase some of these raw materials for use in our Industrial Specialties segment, primarily for vinyl acetate ethylene emulsions and ethylene vinyl acetate production, as well as significant amounts of wood pulp for use in our production of cellulose derivatives in our Consumer Specialties segment. The price of many of these items is dependent on the available supply of that item and may increase significantly as a result of uncertainties associated with war, terrorist activities, civil unrest, epidemics, pandemics, weather, natural disasters, the effects of climate change or political instability, plant or production disruptions, strikes or other labor unrest, breakdown or degradation of transportation infrastructure used in the delivery of strategic raw materials and energy commodities, or changes in laws or regulations in any of the countries in which we have significant suppliers. In particular, to the extent of our vertical integration in the production of chemicals, shortages in the availability of raw material chemicals, such as natural gas, ethylene and methanol, or the loss of our dedicated supplies of carbon monoxide, may have an increased adverse impact on us as it can cause a shortage in intermediate and finished products. Such shortages would adversely impact our ability to produce certain products and increase our costs resulting in reduced margins and adverse financial results.

We are exposed to volatility in the prices of our raw materials and energy. Although we have long-term supply agreements, multi-year purchasing and sales agreements and forward purchase contracts providing for the supply of ethylene, methanol,

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carbon monoxide, wood pulp, natural gas and electricity, the contractual prices for these raw materials and energy can vary with economic conditions and may be highly volatile. In addition to the factors noted above that may impact supply or price, factors that have caused volatility in our raw material prices in the past and which may do so in the future include:

• Shortages of raw materials due to increasing demand, e.g., from growing uses or new uses;

• Capacity constraints, e.g., due to construction delays, labor disruption, involuntary shutdowns or turnarounds;

• The inability of a supplier to meet our delivery orders or a supplier's choice not to fulfill orders or to terminate a supply contract or our inability to obtain or renew supply contracts on favorable terms;

• The general level of business and economic activity; and

• The direct or indirect effect of governmental regulation (including the impact of government regulation relating to climate change).

If we are not able to fully offset the effects of higher energy and raw material costs through price increases, productivity improvements or cost reduction programs, or if such commodities become unavailable, it could have a significant adverse effect on our ability to timely and profitably manufacture and deliver our products resulting in reduced margins and adverse financial results.

We have a practice of maintaining, when available, multiple sources of supply for raw materials and services. However, some of our individual plants may have single sources of supply for some of their raw materials, such as carbon monoxide, steam and ethylene, or services. Although we have been able to obtain sufficient supplies of raw materials and services, there can be no assurance that unforeseen developments will not affect our ability to source raw materials or services in the future. Even if we have multiple sources of supply for a raw material or a service, there can be no assurance that these sources can make up for the loss of a major supplier. Furthermore, if any sole source or major supplier were unable or unwilling to deliver a raw material or a service for an extended period of time, we may not be able to find an acceptable alternative or any such alternative could result in increased costs. It is also possible profitability will be adversely affected if we are required to qualify additional sources of supply for a raw material or a service to our specifications in the event of the loss of a sole source or major supplier.

A portion of our supply of methanol in North America is currently obtained from our joint venture, Fairway Methanol LLC ("Fairway"), with Mitsui & Co., Ltd., of Tokyo, Japan, in which we own a 50% interest, for the production of methanol at our integrated chemical plant in Clear Lake, Texas.

Production at our manufacturing facilities, or at our suppliers', could be disrupted for a variety ofreasons, which could prevent us from producing enough of our products to maintain oursales and satisfy our customers' demands.

A disruption in production at one or more of our manufacturing facilities, or our suppliers, could have a material adverse effect on our business. Disruptions could occur for many reasons, including fire, natural disasters, weather, unplanned maintenance or other manufacturing problems, disease, strikes or other labor unrest, transportation interruption, government regulation, political unrest or terrorism. Alternative facilities with sufficient capacity or capabilities may not be available, may cost substantially more or may take a significant time to start production, each of which could negatively affect our business and financial performance. If one of our key manufacturing facilities is unable to produce our products for an extended period of time, our sales may be reduced by the shortfall caused by the disruption and we may not be able to meet our customers' needs, which could cause them to seek other suppliers. In particular, production disruptions at our manufacturing facilities that produce chemicals used as inputs in the production of chemicals in other business segments, such as acetic acid, VAM and formaldehyde, could have a more significant adverse effect on our business and financial performance and results of operations to the extent of such vertical integration. Furthermore, to the extent a production disruption occurs at a manufacturing facility that has been operating at or near full capacity, the resulting shortage of our product could be particularly harmful because production at such manufacturing facility may not be able to reach levels achieved prior to the disruption.

Failure to develop new products and production technologies or to implementproductivity and cost reduction initiatives successfully, may harm our competitiveposition.

Our operating results depend significantly on the development of commercially viable new products, product grades and applications, as well as process technologies, free of any legal restrictions. If we are unsuccessful in developing new products, applications and production processes in the future, including failing to leverage our opportunity pipeline in our Advanced Engineered Materials segment, our competitive position and operating results may be negatively affected. However, as we invest in new technology, we face the risk of unanticipated operational or commercialization difficulties, including an inability

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to obtain necessary permits or governmental approvals, the development of competing technologies, failure of facilities or processes to operate in accordance with specifications or expectations, construction delays, cost over-runs, the unavailability of financing, required materials or equipment and various other factors. Likewise, we have undertaken and are continuing to undertake initiatives in all of our business segments to improve productivity and performance and to generate cost savings. These initiatives may not be completed or beneficial or the estimated cost savings from such activities may not be realized.

Our business exposes us to potential product liability claims and recalls, whichcould adversely affect our financial condition and performance.

The development, manufacture and sale of specialty chemical products by us, including products produced for the food and beverage, cigarette, automobile, construction, aerospace, medical device and pharmaceutical industries, involves a risk of exposure to product liability claims, product recalls, product seizures and related adverse publicity. A product liability claim or judgment against us could also result in substantial and unexpected expenditures, affect consumer or customer confidence in our products, and divert management's attention from other responsibilities. Although we maintain product liability insurance, there can be no assurance that this type or the level of coverage is adequate or that we will be able to continue to maintain our existing insurance or obtain comparable insurance at a reasonable cost, if at all. A product recall or a partially or completely uninsured judgment against us could have a material adverse effect on our results of operations or financial condition. Although we have standard contracting policies and controls, we may not always be able to contractually limit our exposure to third party claims should our failure to perform result in downstream supply disruptions or product recalls.

We could be subject to damages based on claims brought against us by our customers or lose customers as a result of the failure of our products to meet certain quality specifications.

Our products provide important performance attributes to our customers' products. If one of our products fails to perform in a manner consistent with quality specifications, a customer could seek replacement of the product or damages for costs incurred as a result of the product failing to perform as guaranteed. A successful claim or series of claims against us could have a material adverse effect on our financial condition and results of operations and could result in a loss of one or more key customers.

Our future success depends in part on our ability to protect our intellectualproperty rights and our rights to use our intellectual property. Our inability to protect and enforce these rights could reduce ourability to maintain our industry position and our profit margins.

We rely on our patents, trademarks, copyrights, know-how and trade secrets and patents and other technology licensed from third parties to protect our investment in research and development and our competitive commercial positions in manufacturing and marketing our products. We have adopted internal policies for protecting our know-how and trade secrets. In addition, our practice is to seek patent or trade secret protection for significant developments that provide us competitive advantages and freedom to practice for our businesses. Patents may cover catalysts, processes, products, intermediate products and product uses. These patents are usually filed in strategic countries throughout the world and provide varying periods and scopes of protection based on the filing date and the type of patent application. The legal life and scope of protection provided by a patent may vary among those countries in which we seek protection. As patents expire, the catalysts, processes, products, intermediate products and product uses described and claimed in those patents generally may become available for use by the public subject to our continued protection for associated know-how and trade secrets. We also monitor intellectual property of others, especially patents that could impact our rights to commercially implement research and development, our rights to manufacture and market our products, and our rights to use know-how and trade secrets. We will not intentionally infringe upon the valid intellectual property rights of others, and we will continue to assess and take actions as necessary to protect our positions. We also seek to register trademarks as a means of protecting the brand names of our products, which brand names become more important once the corresponding product or process patents have expired. We operate in regions of the world where intellectual property protection may be limited and difficult to enforce and our continued growth strategy may result in us seeking intellectual property protection in additional regions with similar challenges. We also monitor the trademarks of others and take action when our trademark rights are being infringed upon. If we are not successful in protecting or maintaining our patent, license, trademark or other intellectual property rights, or protecting our rights to commercially make, market and sell our products, our net sales, results of operations and cash flows may be adversely affected.

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Our business is exposed to risks associated with the creditworthiness of oursuppliers, customers and business partners and the industries in which our suppliers, customers and business partnersparticipate are cyclical in nature, both of which may adversely affectour business and results of operations.

Our business is exposed to risks associated with the creditworthiness of our key suppliers, customers and business partners and reductions in demand for our customers' products. These risks include the interruption of production at the facilities of our customers, the reduction, delay or cancellation of customer orders, delays in or the inability of customers to obtain financing to purchase our products, delays in or interruptions of the supply of raw materials we purchase and bankruptcy of customers, suppliers or other creditors. Furthermore, some of the industries in which our end-use customers participate, such as the automotive, electrical, construction and textile industries, are highly competitive, to a large extent driven by end-use applications, and may experience overcapacity, all of which may affect demand for and the pricing of our products. In addition, many of these industries are cyclical in nature, thus posing risks to us that vary throughout the year. The occurrence of any of these events may adversely affect our cash flow, profitability and financial condition.

Failure to comply with applicable laws or regulations and/or changes in applicable laws or regulations may adversely affect our business and financial results as a whole.

We are subject to extensive international, national, state, local and other laws and regulations. Failure to comply with these laws, including antitrust and anticorruption laws, rules, regulations or court decisions, could expose us to fines, penalties and other costs. Although we have implemented policies and procedures designed to ensure compliance with these laws, rules, regulations and court decisions, there can be no assurance that our employees and business partners and other third parties acting on our behalf will comply with these laws, rules, regulations and court decisions, which could result in fines, penalties and costs and damage to our business reputation.

Moreover, changes in laws or regulations, including the more aggressive enforcement of such laws and regulations, such as unexpected changes in regulatory requirements (including import or export licensing requirements), or changes in reporting requirements of the US, Canadian, Mexican, German, EU or Asian governmental agencies, could increase the cost of doing business in these regions. Any of these conditions, including the failure to obtain or maintain operating permits for our business, may have an effect on our business and financial results as a whole and may result in volatile current and future prices for our securities, including our stock.

Environmental regulations and other obligations relating to environmental matterscould subject us to liability for fines, clean-ups and other damages, requireus to incur significant costs to modify our operations and increase our manufacturingand delivery costs.

Costs related to our compliance with environmental laws and regulations, and potential obligations with respect to sites currently or formerly owned or operated by us, may have a significant negative impact on our operating results. We also have obligations related to the indemnity agreement contained in the demerger and transfer agreement between Celanese GmbH and Hoechst AG for environmental matters arising out of certain divestitures that took place prior to the demerger.

Our operations are subject to extensive international, national, state, local and other laws and regulations that govern environmental and health and safety matters. We incur substantial capital and other costs to comply with these requirements. If we violate any one of those laws or regulations, we can be held liable for substantial fines and other sanctions, including limitations on our operations as a result of changes to or revocations of environmental permits involved. Stricter environmental, safety and health laws and regulations could result in substantial costs and liabilities to us or limitations on our operations. Consequently, compliance with these laws and regulations may negatively affect our earnings and cash flows in a particular reporting period. See Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations - Liquidity and Capital Resourcesfor further information.

Changes in environmental, health and safety regulations in the jurisdictions where wemanufacture or sell our products could lead to a decrease in demand for ourproducts.

New or revised governmental regulations and independent studies relating to the effect of our products on health, safety or the environment may affect demand for our products and the cost of producing our products. In addition, products we produce, including VAM, formaldehyde and plastics derived from formaldehyde, may be classified in a manner that would adversely affect demand for such products. For example, the International Agency for Research on Cancer ("IARC"), a private research agency, classified formaldehyde as carcinogenic to humans (Group 1) based on studies linking formaldehyde exposure to nasopharyngeal cancer, a rare cancer in humans. In addition, several studies have investigated possible links between formaldehyde exposure and various end points, including leukemia. In October 2009, IARC concluded that there is sufficient

21

evidence of a causal association between formaldehyde and the development of leukemia. In 2011, the National Toxicology Program ("NTP") released the 12th report on carcinogens, which changed the classification of formaldehyde from "reasonably anticipated to be a human carcinogen" to "known to be a human carcinogen". Similar to the IARC modification in 2009, the NTP report also implicates formaldehyde as a leukemogen. We anticipate that the results of the IARC's and the NTP's reviews will be examined and considered by government agencies with responsibility for setting worker and environmental exposure standards and labeling requirements.

Other pending initiatives potentially will require toxicological testing and risk assessments of a wide variety of chemicals, including chemicals used or produced by us. These initiatives include the Voluntary Children's Chemical Evaluation Program, High Production Volume Chemical Initiative and expected modifications to the Toxic Substances Control Act in the US, as well as various European Commission programs, such as the Registration, Evaluation, Authorization and Restriction of Chemicals, and new initiatives in Asia and other regions. These assessments may result in heightened concerns about the chemicals involved and additional requirements being placed on the production, handling, labeling or use of the subject chemicals. Such concerns and additional requirements could also increase the cost incurred by our customers to use our chemical products and otherwise limit the use of these products, which could lead to a decrease in demand for these products. Such a decrease in demand would likely have an adverse impact on our business and results of operations.

Our production facilities, including facilities we own and/or operate and operations at our facilities owned and/or operated by third parties, handle the processing of some volatile and hazardousmaterials that subject us to operating and other risks that could have a negative effect on ouroperating results.

Although we take precautions to enhance the safety of, and minimize the disruption to, our operations and operations at our facilities owned and/or operated by third parties, we are subject to operating and other risks associated with chemical manufacturing, including the storage and transportation of raw materials, finished products and waste. These risks include, among other things, pipeline and storage tank leaks and ruptures, explosions and fires and discharges or releases of toxic or hazardous substances. In addition, we may have limited control over operations at our facilities owned and/or operated by third parties or such operations may not be fully integrated into our safety programs.

These operating and other risks can cause personal injury, property damage, third-party damages and environmental contamination, and may result in the shutdown of affected facilities and the imposition of civil or criminal penalties. The occurrence of any of these events may disrupt production and have a negative effect on the productivity and profitability of a particular manufacturing facility, our operating results and cash flows.

US federal regulations aimed at increasing security at certain chemical productionplants and similar legislation that may be proposed in the future, if passedinto law, may increaseour operating costs and cause an adverse effect on our results of operations.

The Chemical Facility Anti-Terrorism Standards program ("CFATS Program"), which is administered by the Department of Homeland Security ("DHS"), identifies and regulates chemical facilities to ensure that they have security measures in place to reduce the risks associated with potential terrorist attacks on chemical plants located in the US. In December 2014, the Protecting and Securing Chemical Facilities from Terrorist Attacks Act of 2014 ("CFATS Act") was enacted. The CFATS Act reauthorizes the CFATS Program for four years. DHS has released an interim final rule under the CFATS Program that imposes comprehensive federal security regulations for high-risk chemical facilities in possession of specified quantities of chemicals of interest. This rule establishes risk-based performance standards for the security of our nation's chemical facilities. It requires covered chemical facilities to prepare Security Vulnerability Assessments, which identify facility security vulnerabilities, and to develop and implement Site Security Plans, which include measures that satisfy the identified risk-based performance standards. We cannot determine with certainty the costs associated with any security measures that DHS may require.

We are subject to risks associated with possible climate change legislation,regulation and international accords.

Greenhouse gas emissions have become the subject of a large amount of international, national, regional, state and local attention. For example, the Environmental Protection Agency has promulgated rules concerning greenhouse gas emissions and cap and trade initiatives to limit greenhouse gas emissions have been introduced in the EU. In addition, regulation of greenhouse gas also could occur pursuant to future treaty obligations, statutory or regulatory changes or new climate change legislation. As such, future environmental legislative and regulatory developments related to climate change are possible, which could materially increase operating costs in the chemical industry and thereby increase our manufacturing and delivery costs.

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Our business and financial results may be adversely affected by various legal andregulatory proceedings.

We are involved in legal and regulatory proceedings, lawsuits, claims and investigations in the normal course of business and could become subject to additional claims in the future, some of which could be material. The outcome of existing proceedings, lawsuits, claims and investigations may differ from our expectations because the outcomes of such proceedings, including regulatory matters, are often difficult to reliably predict. Various factors or developments can lead us to change current estimates of liabilities and related insurance receivables where applicable, or permit us to make such estimates for matters previously not susceptible to reasonable estimates, such as a significant judicial ruling or judgment, a significant settlement, significant regulatory developments, or changes in applicable law. A future adverse ruling, settlement, or unfavorable development could result in charges that could have a material adverse effect on our business, results of operations or financial condition in any particular period. See Note 16 - Environmental and Note 24 - Commitments and Contingencies in the accompanying consolidated financial statements for further information.

Changes in, or the interpretation of, tax legislation or rates throughout the world could materially impact our results.

Our future effective tax rate and related tax balance sheet attributes could be impacted by changes in tax legislation throughout the world. The overall tax environment has made it increasingly challenging for multinational corporations to operate with certainty about taxation in many jurisdictions. For example, the European Commission has been conducting investigations focusing on whether local country tax rulings or tax legislation provide preferential tax treatment that violates EU state aid rules. In addition, the Organization of Economic Cooperation and Development, which represents a coalition of member countries, is supporting changes to numerous long-standing tax principles through its base erosion and profit shifting project, which is focused on a number of issues, including the shifting of profits among affiliated entities located in different tax jurisdictions. Furthermore, a number of countries where we do business, including the US and many countries in the EU, are considering changes in relevant tax, accounting and other laws, regulations and interpretations, including changes to tax laws applicable to multinational corporations. The increasingly complex global tax environment could have a material adverse effect on our effective tax rate, results of operations, cash flows and financial condition.

On December 22, 2017, the Tax Cuts and Jobs Act (the "TCJA") was enacted and is effective January 1, 2018. Accounting Standards Codification 740, Accounting for Income Taxes, requires companies to recognize the effects of tax law changes in the period of enactment. This overhaul of the US tax law made a number of substantial changes, including the reduction of the corporate tax rate from 35% to 21%, establishing a dividends received deduction for dividends paid by foreign subsidiaries to the US, elimination or limitation of certain deductions (interest, domestic production activities and executive compensation), imposing a mandatory tax on previously unrepatriated earnings accumulated offshore since 1986 and establishing global minimum income tax and base erosion tax provisions related to offshore activities and affiliated party payments. Due to the timing of the new tax law and the substantial changes it brings, the Staff of the Securities and Exchange Commission (the "SEC") issued Staff Accounting Bulletin No. 118 ("SAB 118"), which provides registrants a measurement period to report the impact of the new US tax law. As a result, the recorded and estimated impacts of TCJA may change in future periods. See Note 19 - Income Taxes in the accompanying consolidated financial statements for further information.

Our future effective tax rates could be affected by changes in the mix of earnings in countries with differing statutory tax rates, expirations of tax holidays or rulings, changes in the assessment regarding the realization of deferred tax assets, or changes in tax laws and regulations or their interpretation. We are subject to the regular examination of our income tax returns by various tax authorities. Examinations in material jurisdictions or changes in laws, rules, regulations or interpretations by local taxing authorities could result in impacts to tax years open under statute or to foreign operating structures currently in place. We regularly assess the likelihood of adverse outcomes resulting from these examinations or changes in laws, rules, regulations or interpretations to determine the adequacy of our provision for taxes. It is possible the outcomes from these examinations will have a material adverse effect on our financial condition and operating results.

Our significant non-US operations expose us to global exchange rate fluctuations thatcould adversely impact our profitability.

We conduct a significant portion of our operations outside the US. Consequently, fluctuations in currencies of other countries, especially the Euro, may materially affect our operating results. Because our consolidated financial statements are presented in US dollars, we must translate revenues, income and expenses, as well as assets and liabilities, into US dollars based on average exchange rates prevailing during the reporting period or the exchange rate at the end of that period. Therefore, increases or decreases in the value of the US dollar against other major currencies will affect our net operating revenues, operating income and the cost of balance sheet items denominated in foreign currencies. Foreign exchange rates can also impact the competitiveness of products produced in certain jurisdictions and exported for sale into other jurisdictions. These changes may impact the value received for the sale of our goods versus those of our competitors.

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In addition to currency translation risks, we incur a currency transaction risk whenever one of our operating subsidiaries enters into a purchase or sales transaction using a currency different from the operating subsidiary's functional currency. Given the volatility of exchange rates, particularly the strengthening of the US dollar against major currencies or the currencies of large developing countries, we may not be able to manage our currency transaction and translation risks effectively.

We use financial instruments to hedge certain exposure to foreign currency fluctuations, but those hedges in most cases cover existing balance sheet exposures and not future transactional exposures. We cannot guarantee that our hedging strategies will be effective. In addition, the use of financial instruments creates counterparty settlement risk. Failure to effectively manage these risks could have an adverse impact on our financial position, results of operations and cash flows.

We are subject to information technology security threats that could materially affect our business.

We have been and will continue to be subject to advanced persistent information technology security threats. While some unauthorized access to our information technology systems occurs, we believe to date these threats have not had a material impact on our business. We seek to detect and investigate these security incidents and to prevent their recurrence but in some cases we might be unaware of an incident or its magnitude and effects. The theft, mis-use or publication of our intellectual property and/or confidential business information or the compromising of our systems or networks could harm our competitive position, cause operational disruption, reduce the value of our investment in research and development of new products and other strategic initiatives or otherwise adversely affect our business or results of operations. To the extent that any security breach results in inappropriate disclosure of our employees', customers' or vendors' confidential information, we may incur liability as a result. Although we attempt to mitigate these risks by employing a number of measures, including monitoring of our systems and networks, and maintenance of backup and protective systems, our systems, networks, products and services remain potentially vulnerable to increasingly sophisticated advanced persistent threats that may have a material effect on our business. In addition, the devotion of additional resources to the security of our information technology systems in the future could significantly increase the cost of doing business or otherwise adversely impact our financial results.

Our success depends upon our ability to attract and retain key employees and theidentification and development of talent to succeed senior management.

We rely heavily on our management team. Accordingly, our success depends on our ability to attract and retain key personnel. The inability to recruit and retain key personnel or the unexpected loss of key personnel may adversely affect our operations. In addition, because of our reliance on our management team, our future success depends in part on our ability to identify and develop talent to succeed senior management. The retention of key personnel and appropriate senior management succession planning will continue to be important to the successful implementation of our strategies.

Significant changes in pension fund investment performance or assumptions relating topension costs may have a material effect on the valuation of pension obligations,the funded status of pension plans and our pension cost.

The cost of our pension plans is incurred over long periods of time and involves many uncertainties during those periods of time. Our funding policy for pension plans is to accumulate plan assets that, over the long run, will approximate the present value of projected benefit obligations. Our pension cost is materially affected by the discount rate used to measure pension obligations, the level and value of plan assets available to fund those obligations at the measurement date and the expected long-term rate of return on plan assets. Significant changes in investment performance or a change in the portfolio mix of invested assets will likely result in corresponding increases and decreases in the valuation of plan assets and a change in the discount rate or mortality assumptions, which will likely result in an increase or decrease in the valuation of pension obligations. The combined impact of these changes will affect the reported funded status of our pension plans as well as the net periodic pension cost in the following fiscal years. In recent years, an extended duration strategy in the asset portfolio has been implemented in some plans to reduce the influence of liability volatility due to changes in interest rates. If the funded status of a pension plan declines, we may be required to make unscheduled contributions in addition to those contributions for which we have already planned.

Some of our employees are unionized, represented by workers councils or are subject to local laws that are less favorable to employers than the laws of the US.

As of December 31, 2017, we had 7,592 employees globally. Approximately 16% of our 2,608 US-based employees are unionized. In addition, a large number of our employees are employed in countries in which employment laws provide greater bargaining or other employment rights than the laws of the US. Such employment rights require us to work collaboratively with the legal representatives of the employees to effect any changes to labor agreements. Most of our employees in Europe are represented by workers councils and/or unions that must approve any changes in terms and conditions of employment,

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including potentially salaries and benefits. They may also impede efforts to restructure our workforce. Although we believe we have a good working relationship with our employees and their legal representatives, a strike, work stoppage, or slowdown by our employees could occur, resulting in a disruption of our operations or higher ongoing labor costs.

Provisions in our certificate of incorporation and bylaws, as well as any stockholders' rights plan, may discourage a takeover attempt.

Provisions contained in our certificate of incorporation and bylaws could make it more difficult for a third party to acquire us, even if doing so might be beneficial to our stockholders. Provisions of our certificate of incorporation and bylaws impose various procedural and other requirements, which could make it more difficult for stockholders to effect certain corporate actions. For example, our certificate of incorporation authorizes our Board of Directors to determine the rights, preferences, privileges and restrictions of unissued series of preferred stock, without any vote or action by our stockholders. Thus, our Board of Directors can authorize and issue shares of preferred stock with voting or conversion rights that could adversely affect the voting or other rights of holders of our Series A common stock, par value $0.0001 per share ("Common Stock"). These rights may have the effect of delaying or deterring a change of control of our Company. In addition, a change of control of our Company may be delayed or deterred as a result of any stockholders' rights plan that our Board of Directors may adopt. These provisions could limit the price that certain investors might be willing to pay in the future for shares of our Common Stock.

We may incur significant charges in the event we close or divest all or part of a manufacturing plant or facility.

We periodically assess our manufacturing operations in order to manufacture and distribute our products in the most efficient manner. Based on our assessments, we may make capital improvements to modernize certain units, move manufacturing or distribution capabilities from one plant or facility to another plant or facility, discontinue manufacturing or distributing certain products or close or divest all or part of a manufacturing plant or facility. We also have shared services agreements at several of our plants and if such agreements are terminated or revised, we would assess and potentially adjust our manufacturing operations. The closure or divestiture of all or part of a manufacturing plant or facility could result in future charges that could be significant. See Note 4 - Acquisitions, Dispositions and Plant Closures in the accompanying consolidated financial statements for further information.

We may not be able to complete future acquisitions or joint venture transactions or successfully integrate them into our business, which could adversely affect our business or resultsof operations.

As part of our growth strategy, we intend to pursue acquisitions and joint venture opportunities. Successful accomplishment of this objective may be limited by the availability and suitability of acquisition candidates, the ability to obtain regulatory approvals necessary to consummate a planned transaction, and by our financial resources, including available cash and borrowing capacity. Acquisitions and joint venture transactions involve numerous risks, including difficulty determining appropriate valuation, integrating operations, technologies, services and products of the acquired lines or businesses, personnel turnover and the diversion of management's attention from other business matters. In addition, we may be unable to achieve anticipated benefits from these transactions in the time frame that we anticipate, or at all, which could adversely affect our business or results of operations.

In addition, if in connection with the tow joint venture we are unable to receive third-party financing on the terms previously contemplated and committed, we may not achieve all of the benefits planned for the joint venture transaction.

The insurance coverage that we maintain may not fully cover all operational risks.

We maintain property, business interruption and casualty insurance but such insurance may not cover all of the risks associated with the hazards of our business and is subject to limitations, including deductibles and maximum liabilities covered. We may incur losses beyond the limits, or outside the coverage, of our insurance policies, including liabilities for environmental remediation. In the future, the types of insurance we obtain and the level of coverage we maintain may be inadequate or we may be unable to continue to maintain our existing insurance or obtain comparable insurance at a reasonable cost.

Differences in views with our joint venture participants may cause our joint ventures not to operate according to their business plans, which may adversely affect our results of operations.

We currently participate in a number of joint ventures and may enter into additional joint ventures in the future. The nature of a joint venture requires us to work cooperatively with unaffiliated third parties. Differences in views among joint venture participants may result in delayed decisions or failure to agree on major decisions. If these differences cause the joint ventures to deviate from their business plans or to fail to achieve their desired operating performance, our results of operations could be adversely affected.

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Risks Related to Our Indebtedness

Our level of indebtedness and other liabilities could diminish our ability to raise additional capital tofund our operations or refinance our existing indebtedness when it matures, limit our ability to react to changes in the economy or thechemicals industry and prevent us from meeting obligations under ourindebtedness.

See Note 14 - Debt in the accompanying consolidated financial statements for further information about our indebtedness. See Note 13 - Noncurrent Other Liabilities, Note 15 - Benefit Obligations and Note 16 - Environmental in the accompanying consolidated financial statements for further information about our other obligations.

Our level of indebtedness and other liabilities could have important consequences, including:

• Increasing our vulnerability to general economic and industry conditions, including exacerbating the impact of any adverse business effects that are determined to be material adverse events under our existing senior credit agreement (the "Credit Agreement") or our indentures (the "Indentures") governing our €300 million in aggregate principal amount of 3.250% senior unsecured notes due 2019, $400 million in aggregate principal amount of 5.875% senior unsecured notes due 2021, $500 million in aggregate principal amount of 4.625% senior unsecured notes due 2022, €750 million in aggregate principal amount of 1.125% senior unsecured notes due 2023 and €300 million in aggregate principal amount of 1.250% senior unsecured notes due 2025 (collectively, the "Senior Notes");

• Requiring a substantial portion of cash flow from operations to be dedicated to the payment of principal and interest on indebtedness and amounts payable in connection with the satisfaction of our other liabilities, therefore reducing our ability to use our cash flow to fund operations, capital expenditures and future business opportunities or pay dividends on our Common Stock;

• Exposing us to the risk of increased interest rates as certain of our borrowings are at variable rates of interest;

• Exposing us to the risk of changes in currency exchange rates as certain of our borrowings are denominated in foreign currencies;

• Limiting our ability to obtain additional financing for working capital, capital expenditures, product development, debt service requirements, acquisitions and general corporate or other purposes;

• Limiting our ability to enter into certain commercial arrangements because of concerns of counterparty risks; and

• Limiting our ability to adjust to changing market conditions and placing us at a competitive disadvantage compared to our competitors who have less debt.

We may incur additional indebtedness in the future, which could increasethe risks described above.

Although covenants under the Credit Agreement and the Indentures limit our ability to incur certain additional indebtedness, these restrictions are subject to a number of qualifications and exceptions, and the indebtedness we could incur in compliance with these restrictions could be significant. To the extent that we incur additional indebtedness, the risks associated with our debt described above, including our possible inability to service our debt, including the Senior Notes, would increase.

Our variable rate and euro denominated indebtedness subjects us to interest rate risk and foreign currency exchange rate risk, which could causeour debt service obligations to increase significantly and affect our operatingresults.

Certain of our borrowings are at variable rates of interest or are euro denominated, which exposes us to interest rate risk and currency exchange rate risk, respectively. See Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations - Liquidity and Capital Resources, Item 7A. Quantitative and Qualitative Disclosures About Market Risk below and Note 22 - Derivative Financial Instruments in the accompanying consolidated financial statements for further information.

We may not be able to generate sufficient cash to service our indebtedness and maybe forced to take other actions to satisfy obligations under our indebtedness, whichmay not be successful.

Our ability to make scheduled payments on or to refinance our debt obligations depends on the financial condition and operating performance of our subsidiaries, which are subject to prevailing economic and competitive conditions and to certain

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financial, business and other factors beyond our control. We may not be able to maintain a level of cash flows from operating activities sufficient to permit us to pay the principal, premium, if any, and interest on our indebtedness.

If our cash flows and capital resources are insufficient to fund our debt service obligations, we may be forced to reduce or delay capital expenditures, sell assets, seek additional capital or restructure or refinance our indebtedness. These alternative measures may not be successful and may not permit us to meet our scheduled debt service obligations. In the absence of such operating results and resources, we could face substantial liquidity problems and might be required to dispose of material assets or operations to meet our debt service and other obligations. We may not be able to consummate those dispositions or to obtain the proceeds that we could realize from them, and these proceeds may not be adequate to meet any debt service obligations then due.

Restrictive covenants in our debt agreements may limit our ability to engage incertain transactions and may diminish our ability to make payments on ourindebtedness or pay dividends.

The Credit Agreement, the Indentures and the Receivables Purchase Agreement (the "Purchase Agreement") governing our receivables securitization facility each contain various covenants that limit our ability to engage in specified types of transactions. The Credit Agreement contains covenants including, but not limited to, restrictions on our ability to incur additional debt; incur liens securing debt; enter into sale-leaseback transactions; merge or consolidate with any other person; and sell, assign, transfer, lease, convey or otherwise dispose of all or substantially all of the Issuer's assets or the assets of its subsidiaries.

In addition, the Indentures limit Celanese US Holdings LLC ("Celanese US") and certain of its subsidiaries' ability to, among other things, incur liens securing debt; enter into sale-leaseback transactions; merge or consolidate with any other person; and sell, assign, transfer, lease, convey or otherwise dispose of all or substantially all of Celanese US's assets or the assets of its restricted subsidiaries.

The Purchase Agreement also contains covenants including, but not limited to, restrictions on CE Receivables LLC, a wholly-owned, "bankruptcy remote" special purpose subsidiary of the Company, and certain other Company subsidiaries' ability to incur indebtedness; grant liens on assets; merge, consolidate, or sell certain assets; prepay or modify certain indebtedness; and engage in other businesses.

Such restrictions in our debt obligations could result in us having to obtain the consent of our lenders and holders of the Senior Notes in order to take certain actions. Disruptions in credit markets may prevent us from obtaining or make it more difficult or more costly for us to obtain such consents. Our ability to expand our business or to address declines in our business may be limited if we are unable to obtain such consents.

A breach of any of these covenants could result in a default, which, if not cured or waived, could have a material adverse effect on our business, financial condition and results of operations. Furthermore, a default under the Credit Agreement could permit lenders to accelerate the maturity of our indebtedness under the Credit Agreement and to terminate any commitments to lend. If the lenders under the Credit Agreement accelerate the repayment of such indebtedness, we may not have sufficient liquidity to repay such amounts or our other indebtedness, including the Senior Notes. In such event, we could be forced into bankruptcy or liquidation.

Celanese and Celanese US are holding companies and depend on subsidiaries to satisfytheir obligations under the Senior Notes and the guarantee of Celanese US's obligationsunder the Senior Notes and the Credit Agreement by Celanese.

As holding companies, Celanese and Celanese US conduct substantially all of their operations through their subsidiaries, which own substantially all of our consolidated assets. Consequently, the principal source of cash to pay Celanese and Celanese US's obligations, including obligations under the Senior Notes and the guarantee of Celanese US's obligations under the Credit Agreement and the Indentures by Celanese, is the cash that our subsidiaries generate from their operations. We cannot assure that our subsidiaries will be able to, or be permitted to, make distributions to enable Celanese US and/or Celanese to make payments in respect of their obligations. Each of our subsidiaries is a distinct legal entity and, under certain circumstances, applicable country or state laws, regulatory limitations and terms of our debt instruments may limit our subsidiaries' ability to distribute cash to Celanese US and Celanese. While the Credit Agreement and the Indentures limit the ability of our subsidiaries to put restrictions on paying dividends or making other intercompany payments to us, these limitations are subject to certain qualifications and exceptions, which may have the effect of significantly restricting the applicability of those limits. In the event Celanese US and/or Celanese do not receive distributions from our subsidiaries, Celanese US and/or Celanese may be unable to make required payments on the indebtedness under the Credit Agreement, the Indentures, the guarantee of Celanese US's obligations under the Credit Agreement and the Indentures by Celanese, or our other indebtedness.

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Item 1B.  Unresolved Staff Comments

None.

Item 2.  Properties

Description of Property

We and our affiliates own or lease numerous production and manufacturing facilities throughout the world. We also own or lease other properties, including office buildings, warehouses, pipelines, research and development facilities and sales offices. We continuously review and evaluate our facilities as a part of our strategy to optimize our business portfolio. The following table sets forth a list of our principal offices, production and other facilities throughout the world as of December 31, 2017.

Site	Leased/Owned	Products/Functions
Corporate Offices
Amsterdam, Netherlands	Leased	Administrative offices
Budapest, Hungary	Leased	Administrative offices
Irving, Texas, US	Leased	Corporate headquarters
Nanjing, China	Leased	Administrative offices
Shanghai, China	Leased	Administrative offices
Sulzbach, Germany	Leased	Administrative offices
Advanced Engineered Materials
Auburn Hills, Michigan, US	Leased	Automotive Development Center
Bishop, Texas, US	Owned	Polyoxymethylene ("POM"), Ultra-high molecular weight polyethylene ("UHMW-PE"), Compounding
Campo Bom, Brazil	Leased	Compounding
Ferrara, Italy	Leased	Compounding
Florence, Kentucky, US	Owned	Compounding
Forli, Italy	Leased	Compounding
Frankfurt am Main, Germany(1)(3)	Owned by InfraServ GmbH & Co. Hoechst KG(5)	POM, Compounding
Fuji City, Japan	Owned by Polyplastics Co., Ltd.(5)	POM, Polybutylene terephthalate, Liquid crystal polymers ("LCP"), Compounding
Jubail, Saudi Arabia	Owned by National Methanol Company(5)	Methyl tertiary-butyl ether, Methanol, POM
Kaiserslautern, Germany(1)	Leased	Long-fiber reinforced thermoplastics ("LFRT")
Kuantan, Malaysia	Owned by Polyplastics Co., Ltd.(5)	POM, Compounding
Lebanon, Tennessee, US	Owned	Compounding
Mantova, Italy	Leased	Compounding
Nanjing, China(2)	Owned	LFRT, UHMW-PE, Compounding
Oberhausen, Germany(1)	Leased	UHMW-PE
Shelby, North Carolina, US	Owned	LCP, Compounding
Silao, Mexico	Leased	Compounding
Spondon, Derby, United Kingdom	Owned	Acetate film
Suzano, Brazil(1)	Leased	Compounding
Suzhou, China(8)	Owned	Compounding
Ulsan, South Korea	Owned by Korea Engineering Plastics Co., Ltd.(5)	POM
Utzenfeld, Germany	Owned	Compounding

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Site	Leased/Owned	Products/Functions
Advanced Engineered Materials
Wehr, Germany	Owned	Compounding
Wilmington, North Carolina, US	Owned by Fortron Industries LLC(5)	Polyphenylene sulfide
Winona, Minnesota, US	Owned	LFRT
Consumer Specialties
Frankfurt am Main, Germany(3)	Owned by InfraServ GmbH & Co. Hoechst KG(5)	Sorbates, Sunett® sweetener
Kunming, China	Leased by Kunming Cellulose Fibers Co. Ltd.(6)	Acetate tow
Lanaken, Belgium	Owned	Acetate tow
Nantong, China	Owned by Nantong Cellulose Fibers Co. Ltd.(7)	Acetate tow, Acetate flake
Narrows, Virginia, US	Owned	Acetate tow, Acetate flake
Ocotlán, Mexico	Owned	Acetate tow, Acetate flake
Zhuhai, China	Leased by Zhuhai Cellulose Fibers Co. Ltd.(6)	Acetate tow
Industrial Specialties
Boucherville, Quebec, Canada	Owned	Conventional emulsions
Edmonton, Alberta, Canada	Owned	Low-density polyethylene resins, Ethylene vinyl acetate
Enoree, South Carolina, US	Owned	Conventional emulsions, Vinyl acetate ethylene ("VAE") emulsions
Frankfurt am Main, Germany(3)	Owned by InfraServ GmbH & Co. Hoechst KG(5)	Conventional emulsions, VAE emulsions
Geleen, Netherlands	Owned	VAE emulsions
Jurong Island, Singapore(1)	Leased	VAE emulsions
Nanjing, China(2)	Owned	Conventional emulsions, VAE emulsions
Perstorp, Sweden	Owned	Conventional emulsions, VAE emulsions
Acetyl Intermediates
Bay City, Texas, US(1)	Leased	Vinyl acetate monomer ("VAM")
Bishop, Texas, US	Owned	Formaldehyde, Paraformaldehyde
Cangrejera, Mexico	Owned	Acetic anhydride, Ethyl acetate, Acetone derivatives
Clear Lake, Texas, US(4)	Owned	Acetic acid, VAM, Methanol
Frankfurt am Main, Germany(3)	Owned by InfraServ GmbH & Co. Hoechst KG(5)	Acetaldehyde, VAM
Jurong Island, Singapore(1)	Leased	Acetic acid, Butyl acetate, Ethyl acetate, VAM
Nanjing, China(2)	Owned	Acetic acid, Acetic anhydride, VAM

__________________________

⁽¹⁾  Celanese owns the assets on this site and leases the land through the terms of a long-term land lease.

⁽²⁾  Multiple Celanese business segments conduct operations at the Nanjing facility. Celanese owns the assets on this site. Celanese also owns the land through "land use right grants" for 46 to 50 years with the right to transfer, mortgage or lease such land during the term of the respective land use right grant.

⁽³⁾  Multiple Celanese business segments conduct operations at the Frankfurt Hoechst Industrial Park located in Frankfurt am Main, Germany.

⁽⁴⁾  Methanol is produced by our joint venture, Fairway Methanol LLC, in which Celanese owns a 50% interest.

⁽⁵⁾  A Celanese equity method investment.

29

⁽⁶⁾  A Celanese cost method investment. The investment owns the assets on this site and leases the land from China National Tobacco Corporation.

⁽⁷⁾  A Celanese cost method investment. Nantong Cellulose Fibers Co. Ltd. owns the assets on this site and the land through "land use right grants" with the right to transfer, mortgage or lease such land during the term of the respective land use right grant.

⁽⁸⁾  Celanese owns the assets on this site. Celanese also owns the land through "land use right grants" for 41 years with the right to transfer, mortgage or lease such land during the term of the respective land use right grant.

Item 3.  Legal Proceedings

The Company is involved in legal and regulatory proceedings, lawsuits, claims and investigations incidental to the normal conduct of its business, relating to such matters as product liability, land disputes, contracts, employment, antitrust and competition, intellectual property, personal injury and other actions in tort, workers' compensation, chemical exposure, asbestos exposure, taxes, trade compliance, acquisitions and divestitures, claims of legacy stockholders, past waste disposal practices and release of chemicals into the environment. The Company is actively defending those matters where it is named as a defendant. Due to the inherent subjectivity of assessments and unpredictability of outcomes of legal proceedings, the Company's litigation accruals and estimates of possible loss or range of possible loss may not represent the ultimate loss to the Company from legal proceedings. See Note 16 - Environmental and Note 24 - Commitments and Contingencies in the accompanying consolidated financial statements for a discussion of material environmental matters and material commitments and contingencies related to legal and regulatory proceedings. See Part I - Item 1A. Risk Factors for certain risk factors relating to these legal proceedings.

Item 4.  Mine Safety Disclosures

None.

Executive Officers of the Registrant

The names, ages and biographies of our executive officers as of February 9, 2018 are as follows:

Name	Age	Position
Mark C. Rohr	66	Chairman of the Board of Directors and Chief Executive Officer, President
Scott M. Sutton	53	Chief Operating Officer
Peter G. Edwards	56	Executive Vice President and General Counsel
Christopher W. Jensen	51	Executive Vice President and Chief Financial Officer
Kevin S. Oliver	46	Chief Accounting Officer and Acting Chief Financial Officer
Shannon L. Jurecka	48	Senior Vice President and Chief Human Resources Officer

Mark C. Rohr was named our Chairman of the Board of Directors, President and Chief Executive Officer in April 2012 after being a member of our Board of Directors since April 2007. Prior to joining the Company, Mr. Rohr was Executive Chairman and director of Albemarle Corporation, a global developer, manufacturer and marketer of highly-engineered specialty chemicals. During his 11 years with Albemarle, he held various executive positions, including Chairman and Chief Executive Officer. Earlier in his career, Mr. Rohr held executive leadership roles with various companies, including Occidental Chemical Corporation and The Dow Chemical Company. Mr. Rohr has served on the board of directors of Ashland Global Holdings Inc. (f/k/a Ashland Inc.) since 2008, and currently serves as a member of its audit committee and its environmental, health & safety committee. In 2016, he also served as Chairman of the American Chemistry Council's Executive Committee and as Chairman of the International Association of Chemical Associations. Mr. Rohr received a bachelor's degree in chemistry and chemical engineering from Mississippi State University.

Scott M. Sutton has served as our Chief Operating Officer since March 2017 and as our Executive Vice President and President, Materials Solutions since June 2015. From January 2015 to June 2015, Mr. Sutton served as our Vice President and General Manager of the Engineered Materials business. Prior to January 2015, Mr. Sutton served as our Vice President of Supply Chain from March 2014 to January 2015 and as our Vice President of Acetic Acid and Anhydride from August 2013 to March 2014. Mr. Sutton had 28 years of industry experience prior to joining the Company, including serving as President and General Manager of Chemtura Corporation's AgroSolutions business, business manager for Landmark Structures and Vice President of a division of Albemarle Corporation. Mr. Sutton earned a civil engineering degree from Louisiana State University and is a registered professional engineer in Texas.

30

Peter G. Edwards has served as our Executive Vice President and General Counsel since January 2017. Mr. Edwards previously was Executive Vice President and General Counsel of Baxalta Incorporated, the biopharmaceutical spin-off from Baxter, from June 2015 until its merger with Shire plc in July 2016. Before that, he was Senior Vice President and General Counsel of the global specialty pharmaceuticals company Mallinckrodt plc from June 2013 to June 2015, and served as its Vice President and General Counsel from May 2010 to its spin-off from Covidien plc in June 2013. He previously served as Executive Vice President and General Counsel for Solvay Pharmaceuticals in Brussels, Belgium from June 2007 until April 2010 and as its Senior Vice President and General Counsel in the US from October 2005 to June 2007. Before that, he held in-house positions of increasing responsibility within Mettler-Toledeo, Inc. and Eli Lilly and Company. Mr. Edwards began his career in 1990 as an associate in the Kansas City, Missouri office of Shook, Hardy & Bacon L.L.P. Mr. Edwards received his J.D., cum laude, from Brigham Young University.

Christopher W. Jensen has served as our Chief Financial Officer since July 2015 and as our Executive Vice President since February 2017. Mr. Jensen has been on a medical leave of absence since October 2017. Prior to February 2017, Mr. Jensen served as our Senior Vice President, Finance since April 2011. He served as our Interim Chief Financial Officer from May 2014 to July 2015. From August 2010 to April 2011, Mr. Jensen served as our Senior Vice President, Finance and Treasurer. Prior to August 2010, Mr. Jensen served as our Vice President and Corporate Controller from March 2009 to July 2010. From May 2008 to February 2009, he served as Vice President of Finance and Treasurer. In his current capacity, Mr. Jensen has global responsibility for corporate finance, treasury operations, insurance risk management, pensions, global business services, information technology, corporate accounting, tax and general ledger accounting. Mr. Jensen was previously the Assistant Corporate Controller from March 2007 through April 2008, where he was responsible for SEC reporting, internal reporting, and technical accounting. In his initial role at the Company from October 2005 through March 2007, he built and directed our technical accounting function. From August 2004 to October 2005, Mr. Jensen worked in the inspections and registration division of the Public Company Accounting Oversight Board. He spent 13 years of his career at PricewaterhouseCoopers LLP, an assurance, tax and advisory services firm, in various positions in both the auditing and mergers & acquisitions groups. Mr. Jensen earned bachelor's and master's degrees in accounting from Brigham Young University and is a Certified Public Accountant.

Kevin S. Oliver has served as our Chief Accounting Officer since July 2016 and served as our Controller from July 2010 until January 2018. Mr. Oliver has also been functioning as our acting Chief Financial Officer while the current Chief Financial Officer has been on medical leave of absence. Prior to his current roles, Mr. Oliver held various executive positions at the Company, including serving as our Assistant Controller and our Director of Technical Accounting. Prior to joining the Company, Mr. Oliver served as an Associate Director of Inspections for the Public Company Accounting Oversight Board from December 2003 to February 2008. He spent 11 years of his career at public accounting firms, including as senior manager at Ernst & Young and Arthur Andersen, each an assurance, tax and advisory services firm, and in various positions in the auditing practice. Mr. Oliver holds a bachelor's degree in accounting from Southern Nazarene University and is a Certified Public Accountant.

Shannon L. Jurecka has served as our Senior Vice President and Chief Human Resources Officer since July 2017. Prior to her current role, Ms. Jurecka served as Vice President of Human Resources for Materials Solutions and the Human Resource leader for Mergers and Acquisitions. Immediately prior to joining the Company in 2016, Ms. Jurecka served as a Human Resources Executive with Bank of America Merrill Lynch for 10 years where she supported multiple businesses during her tenure, including her most recent role supporting over 20,000 operations employees in more than 25 locations across seven states. She also served as the Dallas and Fort Worth Market Human Resource Executive responsible for market strategic talent objectives. Prior to Bank of America, she worked at Dell as a Mechanical Engineering Project Manager prior to moving into Learning and Leadership Development. Ms. Jurecka holds a bachelor's degree in speech communication from Sam Houston State University and a master’s degree in organizational leadership and ethics from St. Edwards University. She holds a secondary education teaching certificate in the State of Texas.

31

PART II

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

Market Information

Our Series A common stock, par value $0.0001 per share ("Common Stock") has traded on the New York Stock Exchange ("NYSE") under the symbol "CE" since January 21, 2005. The closing sale price of our Common Stock, as reported by the NYSE, on February 2, 2018 was $105.09. The following table sets forth the high and low intraday sales prices per share of our Common Stock, as reported by the NYSE, and the dividends declared per share on our Common Stock for the periods indicated.

	Price Range		Dividends Declared
	High	Low
	(In $ per share)
2017
Quarter ended March 31, 2017	93.05	78.38	0.36
Quarter ended June 30, 2017	96.97	83.34	0.46
Quarter ended September 30, 2017	104.75	91.15	0.46
Quarter ended December 31, 2017	109.70	101.88	0.46
2016
Quarter ended March 31, 2016	67.99	55.07	0.30
Quarter ended June 30, 2016	74.55	61.11	0.36
Quarter ended September 30, 2016	71.18	60.59	0.36
Quarter ended December 31, 2016	84.97	63.02	0.36

Holders

No shares of Celanese's Series B common stock and no shares of Celanese's 4.25% convertible perpetual preferred stock are issued and outstanding. As of February 2, 2018, there were 26 holders of record of our Common Stock. By including persons holding shares in broker accounts under street names, however, we estimate we have approximately 80,030 beneficial holders.

Dividend Policy

Our Board of Directors has a policy of declaring, subject to legally available funds, a quarterly cash dividend on each share of our Common Stock as determined in its sole discretion. Our Board of Directors may, at any time, modify or revoke our dividend policy on our Common Stock.

On February 8, 2018, we declared a cash dividend of $0.46 per share on our Common Stock amounting to $62 million. The cash dividend will be paid on March 2, 2018 to holders of record as of February 20, 2018.

The amount available to us to pay cash dividends is not currently restricted by our existing senior credit facility and our indentures governing our senior unsecured notes. See Note 14 - Debt in the accompanying consolidated financial statements for further information. Any decision to declare and pay dividends in the future will be made at the discretion of our Board of Directors and will depend on, among other things, our results of operations, cash requirements, financial condition, contractual restrictions and other factors that our Board of Directors may deem relevant.

32

Celanese Purchases of its Equity Securities

Information regarding repurchases of our Common Stock during the three months ended December 31, 2017 is as follows:

Period	Total Number of Shares Purchased(1)	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Program	Approximate Dollar Value of Shares Remaining that may be Purchased Under the Program(2)
October 1 - 31, 2017	10,676	$	104.10	—	$	1,531,000,000
November 1 - 30, 2017	924	$	104.02	—	$	1,531,000,000
December 1 - 31, 2017	38,605	$	106.36	—	$	1,531,000,000
Total	50,205			—

___________________________

⁽¹⁾  Represents shares withheld from employees to cover their statutory minimum withholding requirements for personal income taxes related to the vesting of restricted stock units.

⁽²⁾  Our Board of Directors has authorized the aggregate repurchase of $3.9 billion of our Common Stock since February 2008, including an increase of $1.5 billion on July 17, 2017.

See Note 17 - Stockholders' Equity in the accompanying consolidated financial statements for further information.

33

Performance Graph

The following performance graph compares the cumulative total return on Celanese Corporation common stock from December 31, 2012 through December 31, 2017 to that of the Standard & Poor's ("S&P") 500 Stock Index and the Dow Jones US Chemicals Index. Cumulative total return represents the change in stock price and the amount of dividends received during the indicated period, assuming reinvestment of all dividends. The performance graph assumes an investment of $100 on December 31, 2012. The stock performance shown in the graph is included in response to SEC requirements and is not intended to forecast or to be indicative of future performance.

Comparison of Cumulative Total Return

The above performance graph and related information shall not be deemed "soliciting material" or to be "filed" with the Securities and Exchange Commission, nor shall such information be incorporated by reference into any future filing under the Securities Act of 1933 or Securities Exchange Act of 1934, each as amended, except to the extent that we specifically incorporate it by reference into such filing.

Recent Sales of Unregistered Securities

Our deferred compensation plan offers certain of our senior employees and directors the opportunity to defer a portion of their compensation in exchange for a future payment amount equal to their deferments plus or minus certain amounts based upon the market-performance of specified measurement funds selected by the participant. These deferred compensation obligations may be considered securities of Celanese. Participants were required to make deferral elections under the plan prior to January 1 of the year such deferrals will be withheld from their compensation. We relied on the exemption from registration provided by Section 4(2) of the Securities Act in making this offer to a select group of employees, fewer than 35 of which were non-accredited investors under the rules promulgated by the Securities and Exchange Commission.

34

Item 6. Selected Financial Data

The balance sheet data as of December 31, 2017, 2016 and 2015 and the statements of operations data for the years ended December 31, 2017, 2016, 2015, 2014 and 2013, all of which are set forth below, are derived from the consolidated financial statements included elsewhere in this Annual Report and should be read in conjunction with those financial statements and the notes thereto. The balance sheet data as of December 31, 2014 and 2013 set forth below was derived from previously issued financial statements, adjusted for a change in accounting policy for debt issuance costs.

	Year Ended December 31,
	2017		2016		2015		2014		2013
	(In $ millions, except per share data)
Statement of Operations Data
Net sales	6,140		5,389		5,674		6,802		6,510
Other (charges) gains, net	(60	)	(11	)	(351	)	15		(158	)
Operating profit (loss)	901		893		326		758		1,508
Earnings (loss) from continuing operations before tax	1,075		1,030		488		941		1,609
Earnings (loss) from continuing operations	862		908		287		627		1,101
Earnings (loss) from discontinued operations	(13	)	(2	)	(2	)	(7	)	—
Net earnings (loss) attributable to Celanese Corporation	843		900		304		624		1,101
Earnings (loss) per common share
Continuing operations — basic	6.21		6.22		2.03		4.07		6.93
Continuing operations — diluted	6.19		6.19		2.01		4.04		6.91
Balance Sheet Data (as of the end of period)
Total assets	9,538		8,357		8,586		8,796		8,994
Total debt	3,641		3,008		2,981		2,723		3,040
Total Celanese Corporation stockholders' equity	2,887		2,588		2,378		2,818		2,699
Other Financial Data
Depreciation and amortization	305		290		357		292		305
Capital expenditures(1)	281		247		483		681		408
Dividends paid per common share(2)	1.74		1.38		1.15		0.93		0.53

________________________

⁽¹⁾  Amounts include accrued capital expenditures. Amounts do not include capital expenditures related to capital lease obligations.

⁽²⁾  Annual dividends for the year ended December 31, 2017 consist of one quarterly dividend payment of $0.36 per share and three quarterly dividend payments of $0.46 per share. Annual dividends for the year ended December 31, 2016 consist of one quarterly dividend payment of $0.30 per share and three quarterly dividend payments of $0.36 per share. See Note 17 - Stockholders' Equity in the accompanying consolidated financial statements for further information.

35

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

In this Annual Report on Form 10-K ("Annual Report"), the term "Celanese" refers to Celanese Corporation, a Delaware corporation, and not its subsidiaries. The terms the "Company," "we," "our" and "us," refer to Celanese and its subsidiaries on a consolidated basis. The term "Celanese US" refers to the Company's subsidiary, Celanese US Holdings LLC, a Delaware limited liability company, and not its subsidiaries.

The following discussion should be read in conjunction with the accompanying consolidated financial statements and notes to the consolidated financial statements, which are prepared in accordance with accounting principles generally accepted in the United States of America ("US GAAP").

Investors are cautioned that the forward-looking statements contained in this section and other parts of this Annual Report involve both risk and uncertainty. Several important factors could cause actual results to differ materially from those anticipated by these statements. Many of these statements are macroeconomic in nature and are, therefore, beyond the control of management. See "Forward-Looking Statements" below.

Forward-Looking Statements

Management's Discussion and Analysis of Financial Condition and Results of Operations ("MD&A") and other parts of this Annual Report contain certain forward-looking statements and information relating to us that are based on the beliefs of our management as well as assumptions made by, and information currently available to, us. Generally, words such as "believe," "expect," "intend," "estimate," "anticipate," "project," "plan," "may," "can," "could," "might," and "will," and similar expressions, as they relate to us are intended to identify forward-looking statements. These statements reflect our current views and beliefs with respect to future events at the time that the statements are made, are not historical facts or guarantees of future performance and involve risks and uncertainties that are difficult to predict and many of which are outside of our control. Further, certain forward-looking statements are based upon assumptions as to future events that may not prove to be accurate. See "Special Note Regarding Forward-Looking Statements"at the beginning of this Annual Report for further discussion.

Risk Factors

Item 1A. Risk Factorsof this Annual Report also contains a description of certain risk factors that you should consider which could significantly affect our financial results. In addition, the following factors could cause our actual results to differ materially from those results, performance or achievements that may be expressed or implied by such forward-looking statements. These factors include, among other things:

• changes in general economic, business, political and regulatory conditions in the countries or regions in which we operate;

• the length and depth of product and industry business cycles particularly in the automotive, electrical, textiles, electronics and construction industries;

• changes in the price and availability of raw materials, particularly changes in the demand for, supply of, and market prices of ethylene, methanol, natural gas, wood pulp and fuel oil and the prices for electricity and other energy sources;

• the ability to pass increases in raw material prices on to customers or otherwise improve margins through price increases;

• the ability to maintain plant utilization rates and to implement planned capacity additions, expansions and maintenance;

• the ability to reduce or maintain current levels of production costs and to improve productivity by implementing technological improvements to existing plants;

• increased price competition and the introduction of competing products by other companies;

• the ability to identify desirable potential acquisition targets and to consummate acquisition or investment transactions, including obtaining regulatory approvals, consistent with our strategy;

• market acceptance of our technology;

• the ability to obtain governmental approvals and to construct facilities on terms and schedules acceptable to us;

36

• changes in tax rates or legislation throughout the world including, but not limited to, adjustments, changes in estimates or interpretations that may impact recorded or future tax impacts associated with the Tax Cuts and Jobs Act (the "TCJA") enacted on December 22, 2017;

• changes in the degree of intellectual property and other legal protection afforded to our products or technologies, or the theft of such intellectual property;

• compliance and other costs and potential disruption or interruption of production or operations due to accidents, interruptions in sources of raw materials, cyber security incidents, terrorism or political unrest, or other unforeseen events or delays in construction or operation of facilities, including as a result of geopolitical conditions, the occurrence of acts of war or terrorist incidents or as a result of weather or natural disasters;

• potential liability for remedial actions and increased costs under existing or future environmental regulations, including those relating to climate change;

• potential liability resulting from pending or future claims or litigation, including investigations or enforcement actions, or from changes in the laws, regulations or policies of governments or other governmental activities, in the countries in which we operate;

• changes in currency exchange rates and interest rates;

• our level of indebtedness, which could diminish our ability to raise additional capital to fund operations or limit our ability to react to changes in the economy or the chemicals industry; and

• various other factors, both referenced and not referenced in this Annual Report.

Many of these factors are macroeconomic in nature and are, therefore, beyond our control. Should one or more of these risks or uncertainties materialize, or should underlying assumptions prove incorrect, our actual results, performance or achievements may vary materially from those described in this Annual Report as anticipated, believed, estimated, expected, intended, planned or projected. We neither intend nor assume any obligation to update these forward-looking statements, which speak only as of their dates.

37

Results of Operations

Financial Highlights

	Year Ended December 31,						Year Ended December 31,
	2017		2016		Change		2016		2015		Change
	(In $ millions, except percentages)
Statement of Operations Data
Net sales	6,140		5,389		751		5,389		5,674		(285	)
Gross profit	1,515		1,405		110		1,405		1,318		87
Selling, general and administrative ("SG&A") expenses	(456	)	(416	)	(40	)	(416	)	(506	)	90
Other (charges) gains, net	(60	)	(11	)	(49	)	(11	)	(351	)	340
Operating profit (loss)	901		893		8		893		326		567
Equity in net earnings (loss) of affiliates	183		155		28		155		181		(26	)
Interest expense	(122	)	(120	)	(2	)	(120	)	(119	)	(1	)
Refinancing expense	—		(6	)	6		(6	)	—		(6	)
Dividend income - cost investments	108		108		—		108		107		1
Earnings (loss) from continuing operations before tax	1,075		1,030		45		1,030		488		542
Earnings (loss) from continuing operations	862		908		(46	)	908		287		621
Earnings (loss) from discontinued operations	(13	)	(2	)	(11	)	(2	)	(2	)	—
Net earnings (loss)	849		906		(57	)	906		285		621
Net earnings (loss) attributable to Celanese Corporation	843		900		(57	)	900		304		596
Other Data
Depreciation and amortization	305		290		15		290		357		(67	)
SG&A expenses as a percentage of Net sales	7.4	%	7.7	%			7.7	%	8.9	%
Operating margin(1)	14.7	%	16.6	%			16.6	%	5.7	%
Other (charges) gains, net
Employee termination benefits	(4	)	(11	)	7		(11	)	(53	)	42
InfraServ ownership change	(4	)	—		(4	)	—		—		—
Asset impairments	—		(2	)	2		(2	)	(126	)	124
Other plant/office closures	(52	)	—		(52	)	—		—		—
Singapore contract termination	—		—		—		—		(174	)	174
Commercial disputes	—		2		(2	)	2		2		—
Total Other (charges) gains, net	(60	)	(11	)	(49	)	(11	)	(351	)	340

_____________________________

⁽¹⁾  Defined as Operating profit (loss) divided by Net sales.

	As of December 31,
	2017	2016
	(In $ millions)
Balance Sheet Data
Cash and cash equivalents	576	638
Short-term borrowings and current installments of long-term debt - third party and affiliates	326	118
Long-term debt, net of unamortized deferred financing costs	3,315	2,890
Total debt	3,641	3,008

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Factors Affecting Business Segment Net Sales

The percentage increase (decrease) in Net sales attributable to each of the factors indicated for each of our business segments is as follows:

Year Ended December 31, 2017 Compared to Year Ended December 31, 2016

	Volume		Price		Currency	Other	Total
	(In percentages)
Advanced Engineered Materials	46		(2	)	1	—	45
Consumer Specialties	(8	)	(8	)	—	—	(16	)
Industrial Specialties	1		3		—	—	4
Acetyl Intermediates	(5	)	14		—	—	9
Total Company	9		5		—	—	14

Year Ended December 31, 2016 Compared to Year Ended December 31, 2015

	Volume		Price		Currency		Other	Total
	(In percentages)
Advanced Engineered Materials	11		(2	)	—		—	9
Consumer Specialties	4		(8	)	—		—	(4	)
Industrial Specialties	(1	)	(8	)	(1	)	—	(10	)
Acetyl Intermediates	(2	)	(10	)	(1	)	2	(11	)
Total Company	2		(8	)	(1	)	2	(5	)

Pension and Postretirement Benefit Plan Costs

The increase (decrease) in pension and other postretirement plan net periodic benefit cost for each of our business segments is as follows:

Year Ended December 31, 2017 Compared to Year Ended December 31, 2016

	Advanced Engineered Materials		Consumer Specialties	Industrial Specialties		Acetyl Intermediates	Other Activities		Total
	(In $ millions)
Service cost	1		—	1		—	—		2
Interest cost and expected return on plan assets	—		—	—		—	(28	)	(28	)
Amortization of prior service credit	—		—	2		—	—		2
Special termination benefit	(1	)	—	(1	)	—	—		(2	)
Recognized actuarial (gain) loss(1)	—		—	—		—	(57	)	(57	)
Curtailment / settlement (gain) loss	—		—	—		—	—		—
Total	—		—	2		—	(85	)	(83	)

______________________________

⁽¹⁾  The decrease in recognized actuarial loss primarily relates to higher asset returns, partially offset by a decrease in the weighted average discount rate used to determine benefit obligations from 3.7% to 3.3%.

39

	Advanced Engineered Materials		Consumer Specialties	Industrial Specialties		Acetyl Intermediates	Other Activities		Total
	(In $ millions)
Cost of sales	—		—	—		—	(3	)	(3	)
SG&A expenses	1		—	3		—	(81	)	(77	)
Research and development expenses	—		—	—		—	(1	)	(1	)
Other charges (gains), net	(1	)	—	(1	)	—	—		(2	)
Total	—		—	2		—	(85	)	(83	)

Year Ended December 31, 2016 Compared to Year Ended December 31, 2015

	Advanced Engineered Materials	Consumer Specialties		Industrial Specialties		Acetyl Intermediates	Other Activities		Total
	(In $ millions)
Service cost	—	(1	)	(3	)	—	(1	)	(5	)
Interest cost and expected return on plan assets	—	—		—		—	5		5
Amortization of prior service credit	—	—		(3	)	—	—		(3	)
Special termination benefit	1	—		—		—	—		1
Recognized actuarial (gain) loss(1)	—	—		—		—	(24	)	(24	)
Curtailment / settlement (gain) loss	—	—		3		—	—		3
Total	1	(1	)	(3	)	—	(20	)	(23	)

______________________________

⁽¹⁾  The decrease in recognized actuarial loss primarily relates to higher asset returns and a gain of $48 million reflecting the incorporation of the RP-2016 mortality tables into the actuarial assumptions for the US pension plans as of December 31, 2016, partially offset by a decrease in the weighted average discount rate used to determine benefit obligations from 4.0% to 3.7%.

	Advanced Engineered Materials	Consumer Specialties		Industrial Specialties		Acetyl Intermediates	Other Activities		Total
	(In $ millions)
Cost of sales	—	(1	)	1		—	(3	)	(3	)
SG&A expenses	—	—		(4	)	—	(17	)	(21	)
Research and development expenses	—	—		—		—	(1	)	(1	)
Other charges (gains), net	1	—		—		—	1		2
Total	1	(1	)	(3	)	—	(20	)	(23	)

See Note 15 - Benefit Obligations in the accompanying consolidated financial statements for further information.

40

Consolidated Results

Year Ended December 31, 2017 Compared to Year Ended December 31, 2016

Net sales increased$751 million, or 13.9%, for the year ended December 31, 2017 compared to the same period in 2016 primarily due to:

• higher volume in our Advanced Engineered Materials segment, primarily related to Net sales generated from SO.F.TER. S.r.l. ("SOFTER") and from the nylon compounding division of Nilit Group ("Nilit"), as well as within our base business, which was driven by new project launches and pipeline growth globally; and

• higher pricing for most of our products in our Acetyl Intermediates segment;

partially offset by:

• lower acetate tow pricing and volume in our Consumer Specialties segment; and

• lower volume for ethanol in our Acetyl Intermediates segment.

Selling, general and administrative expenses increased $40 million, or 9.6% for the year ended December 31, 2017 compared to the same period in 2016 primarily due to:

• an increase in spending of approximately $100 million in our Advanced Engineered Materials segment and Other Activities primarily related to ongoing merger, acquisition and integration related costs;

partially offset by:

• a decrease in pension and other postretirement plan net periodic benefit cost of $77 million.

Operating profit increased$8 million, or 0.9%, for the year ended December 31, 2017 compared to the same period in 2016 primarily due to:

• an increase in Net sales; and

• cost savings in our Acetyl Intermediates and Consumer Specialties segments, primarily due to productivity initiatives;

partially offset by:

• higher raw material costs, primarily in our Acetyl Intermediates segment;

• higher plant spending of $138 million in our Advanced Engineered Materials segment, primarily related to our acquisitions of SOFTER and Nilit, as these acquired businesses incur ongoing plant spending;

• an unfavorable impact of $49 million to Other (charges) gains, net in our Acetyl Intermediates segment. During the year ended December 31, 2017, we provided notice of termination of a contract with a key raw materials supplier at our ethanol production unit in Nanjing, China. As a result, we recorded an estimated $51 million of plant/office closure costs primarily consisting of a $22 million contract termination charge and a $21 million reduction to our non-income tax receivable. See Note 18 - Other (Charges) Gains, Net in the accompanying consolidated financial statements for further information; and

• an increase in SG&A expenses.

Equity in net earnings (loss) of affiliates increased$28 million for the year ended December 31, 2017 compared to the same period in 2016 primarily due to:

• an increase in equity in net earnings (loss) of affiliates of $20 million from our Ibn Sina strategic affiliate as a result of higher pricing and timing of turnaround activity.

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Our effective income tax rate for the year ended December 31, 2017 was 20% compared to 12% for the year ended 2016. The 2017 effective tax rate was impacted by the enactment of the TCJA on December 22, 2017. We recognized net tax expense of $197 million in the fourth quarter of 2017 to reflect the deemed repatriation of foreign earnings accumulated offshore since 1986. This expense of $197 million was partially offset by a $107 million reduction of our deferred tax liabilities as a result of lowering the US tax rate from 35% to 21% and other technical provisions in the TCJA. We also recognized a net tax benefit of $76 million related to foreign tax credits generated as a result of various internal reorganizations undertaken in preparation for our previously announced joint venture with the Blackstone Group L.P. (the "Blackstone Entities"). No material cash impact is expected from the deemed repatriation due to existing foreign tax credit carryforwards. The 2016 effective income tax rate was favorably impacted primarily due to settlement of uncertain tax positions and technical clarifications in Germany and the US of $55 million.

The global minimum income tax and base erosion provisions of the TCJA are effective for taxable years beginning after December 31, 2017. We do not currently expect the provisions of the TCJA to have a material impact on our future tax rate.

Due to the timing of the new tax law and the substantial changes it brings, the Staff of the Securities and Exchange Commission issued Staff Accounting Bulletin No. 118, which provides registrants a measurement period to report the impact of the new US tax law. During the measurement period, provisional amounts for the effects of the law are recorded to the extent a reasonable estimate can be made. To the extent that all information necessary is not available, prepared or analyzed, companies may recognize provisional estimated amounts for a period of up to one year following enactment of the TCJA.

We have recorded provisional amounts for several of the impacts of the new tax law including: the deemed repatriation tax on post-1986 accumulated earnings and profits, the deferred tax rate change effect of the new law, gross foreign tax credit carryforwards and related valuation allowances to offset foreign tax credit carryforwards. Certain items or estimates that result in impacts of the TCJA being provisional include: detailed foreign earnings calculations for the most recent period, projected foreign cash balances for certain foreign subsidiaries and finalized computations of foreign tax credit availability. In addition, our 2017 US federal income tax return will not be finalized until later in 2018, and while historically this process has resulted in offsetting changes in estimates in current and deferred taxes for items which are timing related, the reduction of the US tax rate will result in adjustments to our income tax (provision) benefit when recorded. Finally, we consider it likely that further technical guidance regarding certain of the new provisions included in the TCJA, as well as clarity regarding state income tax conformity to current federal tax code, may be issued.

See Note 4 - Acquisitions, Dispositions and Plant Closures and Note 19 - Income Taxes in the accompanying consolidated financial statements for further information.

Year Ended December 31, 2016 Compared to Year Ended December 31, 2015

Net sales decreased$285 million, or 5.0%, for the year ended December 31, 2016 compared to the same period in 2015 primarily due to:

• lower pricing, primarily for acetic acid and VAM in our Acetyl Intermediates segment and acetate tow in our Consumer Specialties segment; and

• lower pricing in our Industrial Specialties segment;

partially offset by:

• higher volume, primarily for POM, in our Advanced Engineered Materials segment; and

• higher acetate tow volume in our Consumer Specialties segment.

Selling, general and administrative expenses decreased$90 million, or 17.8%, for the year ended December 31, 2016 compared to the same period in 2015 primarily due to:

• lower functional spending and incentive compensation costs of $31 million;

• productivity initiatives across all of our business segments; and

• a decrease in pension and other postretirement plan net periodic benefit cost of $21 million.

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Operating profit increased$567 million, or 173.9%, for the year ended December 31, 2016 compared to the same period in 2015 primarily due to:

• lower raw material costs across all of our business segments;

• a favorable impact from Other (charges) gains, net of $340 million. In December 2015, we terminated our existing agreement with a raw materials supplier in Singapore. In connection with the contract termination, we recorded $174 million to Other (charges) gains, net, which did not recur in 2016. We also recorded long-lived asset impairment losses of $123 million to fully write-off certain ethanol related assets at our acetyl facility in Nanjing, China during the three months ended December 31, 2015, which did not recur in 2016. See Note 18 - Other (Charges) Gains, Net in the accompanying consolidated financial statements for further information; and

• a decrease in SG&A expenses;

partially offset by:

• lower Net sales.

Equity in net earnings (loss) of affiliates decreased$26 million for the year ended December 31, 2016 compared to the same period in 2015 primarily due to:

• a decrease in equity in net earnings (loss) of affiliates of $50 million from our Ibn Sina strategic affiliate as a result of lower pricing for methyl tertiary-butyl ether ("MTBE") and methanol.

Our effective income tax rate for the year ended December 31, 2016 was 12% compared to 41% for the year ended 2015. The lower effective income tax rate is primarily due to settlement of uncertain tax positions and technical clarifications in Germany and the US of $55 million. See Note 19 - Income Taxes in the accompanying consolidated financial statements for further information.

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Business Segments

Advanced Engineered Materials

	Year Ended December 31,					%		Year Ended December 31,						%
	2017		2016		Change	Change		2016		2015		Change		Change
	(In $ millions, except percentages)
Net sales	2,096		1,444		652	45.2	%	1,444		1,326		118		8.9	%
Net Sales Variance
Volume	46	%						11	%
Price	(2)	%						(2)	%
Currency	1	%						—	%
Other	—	%						—	%
Other (charges) gains, net	(2	)	(2	)	—	—	%	(2	)	(7	)	5		(71.4	)%
Operating profit (loss)	383		350		33	9.4	%	350		235		115		48.9	%
Operating margin	18.3	%	24.2	%				24.2	%	17.7	%
Equity in net earnings (loss) of affiliates	168		122		46	37.7	%	122		150		(28	)	(18.7	)%
Depreciation and amortization	108		92		16	17.4	%	92		99		(7	)	(7.1	)%

Year Ended December 31, 2017 Compared to Year Ended December 31, 2016

Net sales increased for the year ended December 31, 2017 compared to the same period in 2016 primarily due to:

• higher volume primarily due to Net sales generated from SOFTER and from Nilit, which represents approximately three-fourths of the increase in volume; and

• higher volume within our base business driven by new project launches and pipeline growth globally, which represents the remainder of the volume growth;

slightly offset by:

• lower pricing for most of our products due to customer and regional mix.

Operating profit increased for the year ended December 31, 2017 compared to the same period in 2016 primarily due to:

• higher Net sales;

partially offset by:

• higher plant spending of $138 million, primarily related to our acquisitions of SOFTER and Nilit, as these acquired businesses incur ongoing plant spending;

• higher energy and raw material costs, primarily related to methanol; and

• higher depreciation and amortization expense, primarily related to our acquisitions of SOFTER and Nilit.

Equity in net earnings (loss) of affiliates increased for the year ended December 31, 2017 compared to the same period in 2016 primarily due to:

• an increase in equity investment in earnings of $20 million from our Ibn Sina strategic affiliate as a result of higher pricing and timing of turnaround activity;

• an increase in equity investment in earnings of $11 million from our InfraServ GmbH & Co. Hoechst KG affiliate as a result of an ownership change between our Advanced Engineered Materials and Other Activities segments. See Note 9 - Investment in Affiliates in the accompanying consolidated financial statements for further information; and

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• an increase in equity investment in earnings of $8 million and $7 million from our Fortron Industries LLC ("Fortron") and Polyplastics Co., Ltd. ("Polyplastics") strategic affiliates, respectively, as a result of higher demand.

On February 1, 2018, we completed the acquisition of 100% of the ownership interests of Omni Plastics, L.L.C. and its subsidiaries ("Omni Plastics"). Omni Plastics specializes in custom compounding of various engineered thermoplastic materials. The acquisition further strengthens our global asset base by adding compounding capacity in the Americas. See Note 29 - Subsequent Events in the accompanying consolidated financial statements for further information.

On May 3, 2017, we acquired the nylon compounding division of Nilit, an independent producer of high performance nylon resins, fibers and compounds. We acquired the nylon compounding product portfolio, customer agreements and manufacturing, technology and commercial facilities. The acquisition of Nilit increases our global engineered materials product platforms, extends the operational model, technical and industry solutions capabilities and expands project pipelines. See Note 4 - Acquisitions, Dispositions and Plant Closures in the accompanying consolidated financial statements for further information.

Year Ended December 31, 2016 Compared to Year Ended December 31, 2015

Net sales increased for the year ended December 31, 2016 compared to the same period in 2015 primarily due to:

• higher volume, primarily for POM in Europe and Asia, driven by new project launches and base business growth;

partially offset by:

• lower pricing in POM due to regional and customer mix.

Operating profit increased for the year ended December 31, 2016 compared to the same period in 2015 primarily due to:

• higher Net sales;

• lower energy and raw material costs, primarily for methanol and polyester; and

• cost savings of $18 million primarily due to productivity initiatives.

Equity in net earnings (loss) of affiliates decreased for the year ended December 31, 2016 compared to the same period in 2015 primarily due to:

• a decrease in equity in net earnings (loss) of affiliates of $50 million from our Ibn Sina strategic affiliate as a result of lower pricing for MTBE and methanol;

partially offset by:

• an increase in equity in net earnings (loss) of affiliates from our Polyplastics and Korea Engineering Plastics Co., Ltd. ("KEPCO") strategic affiliates of $15 million and $9 million, respectively, primarily as a result of higher demand.

In December 2016, we acquired 100% of the stock of the Forli, Italy based SOFTER, a leading thermoplastic compounder. The acquisition included its comprehensive product portfolio of engineering thermoplastics, including nylon and polypropylene polymers, and thermoplastic elastomers, as well as all of its manufacturing, technology and commercial facilities and customer agreements. The acquisition supports the strategic growth of the engineered materials business. See Note 4 - Acquisitions, Dispositions and Plant Closures in the accompanying consolidated financial statements for further information.

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Consumer Specialties

	Year Ended December 31,						%		Year Ended December 31,						%
	2017		2016		Change		Change		2016		2015		Change		Change
	(In $ millions, except percentages)
Net sales	785		929		(144	)	(15.5	)%	929		969		(40	)	(4.1	)%
Net Sales Variance
Volume	(8	)%							4	%
Price	(8	)%							(8	)%
Currency	—	%							—	%
Other	—	%							—	%
Other (charges) gains, net	(2	)	(2	)	—		—	%	(2	)	(25	)	23		(92.0	)%
Operating profit (loss)	218		302		(84	)	(27.8	)%	302		262		40		15.3	%
Operating margin	27.8	%	32.5	%					32.5	%	27.0	%
Equity in net earnings (loss) of affiliates	3		3		—		—	%	3		2		1		50.0	%
Dividend income - cost investments	107		107		—		—	%	107		106		1		0.9	%
Depreciation and amortization	44		45		(1	)	(2.2	)%	45		60		(15	)	(25.0	)%

Year Ended December 31, 2017 Compared to Year Ended December 31, 2016

Net sales decreased for the year ended December 31, 2017 compared to the same period in 2016 primarily due to:

• lower acetate tow volume and pricing due to lower global industry utilization.

Operating profit decreased for the year ended December 31, 2017 compared to the same period in 2016 primarily due to:

• lower Net sales;

partially offset by:

• lower spending and raw material costs of $37 million primarily related to productivity initiatives in our cellulose derivatives business.

On June 18, 2017, Celanese, through various subsidiaries, entered into an agreement with affiliates of the Blackstone Entities to form a joint venture which combines substantially all of the operations of our cellulose derivatives business and the operations of the Rhodia Acetow cellulose acetate business owned by the Blackstone Entities. See Note 4 - Acquisitions, Dispositions and Plant Closures in the accompanying consolidated financial statements for further information. We have received regulatory approval in four out of six jurisdictions requiring approval, and the European Commission ("EC") has moved into its Phase II investigation of the ongoing merger review process. Under the standard review process of a Phase II investigation, we received a statement of objections from the EC. This statement of objections sets out the provisional position of the EC and does not prejudge the final outcome of the case.

Year Ended December 31, 2016 Compared to Year Ended December 31, 2015

Net sales decreased for the year ended December 31, 2016 compared to the same period in 2015 primarily due to:

•lower acetate tow pricing due to lower global industry utilization;

partially offset by:

• higher acetate tow volume, primarily in Europe, due to customer destocking in the first half of prior year, which did not recur in 2016.

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Operating profit increased for the year ended December 31, 2016 compared to the same period in 2015 primarily due to:

• lower raw material costs, including acetic acid and anhydride;

• a favorable impact in Other (charges) gains, net due to employee termination costs of $24 million, which was recorded as a result of a 50% capacity reduction at our acetate tow facility in Lanaken, Belgium in December 2015, which did not recur in 2016. See Note 4 - Acquisitions, Dispositions and Plant Closures in the accompanying consolidated financial statements for further information; and

• cost savings of $25 million primarily due to productivity initiatives in our cellulose derivatives business;

partially offset by:

• lower Net sales.

Depreciation and amortization expense, which is included within Operating profit (loss), decreased during the year ended December 31, 2016 compared to the same period in 2015 as a result of accelerated depreciation expense of $10 million related to a 50% capacity reduction at our acetate tow facility in Lanaken, Belgium in December 2015, which did not recur in 2016. See Note 4 - Acquisitions, Dispositions and Plant Closures in the accompanying consolidated financial statements for further information.

Industrial Specialties

	Year Ended December 31,						%		Year Ended December 31,						%
	2017		2016		Change		Change		2016		2015		Change		Change
	(In $ millions, except percentages)
Net sales	1,023		979		44		4.5	%	979		1,082		(103	)	(9.5	)%
Net Sales Variance
Volume	1	%							(1)	%
Price	3	%							(8)	%
Currency	—	%							(1)	%
Other	—	%							—	%
Other (charges) gains, net	—		(3	)	3		(100.0	)%	(3	)	(10	)	7		(70.0	)%
Operating profit (loss)	87		105		(18	)	(17.1	)%	105		72		33		45.8	%
Operating margin	8.5	%	10.7	%					10.7	%	6.7	%
Depreciation and amortization	38		34		4		11.8	%	34		64		(30	)	(46.9	)%

Year Ended December 31, 2017 Compared to Year Ended December 31, 2016

Net sales increased for the year ended December 31, 2017 compared to the same period in 2016 primarily due to:

• higher pricing and volume in our emulsion polymers business due to higher raw material costs for VAM across all regions and stronger demand in China.

Operating profit decreased for the year ended December 31, 2017 compared to the same period in 2016 primarily due to:

• higher spending and raw material costs of $41 million, primarily VAM;

partially offset by:

• higher Net sales.

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Year Ended December 31, 2016 Compared to Year Ended December 31, 2015

Net sales decreased for the year ended December 31, 2016 compared to the same period in 2015 primarily due to:

• lower pricing in our emulsion polymers and EVA polymers businesses due to lower raw material costs globally for VAM.

Operating profit increased for the year ended December 31, 2016 compared to the same period in 2015 primarily due to:

• lower energy and raw material costs, primarily VAM; and

• cost savings of $28 million, primarily due to productivity initiatives in our emulsion polymers business; and

• a favorable impact from Other (charges) gains, net. During the year ended December 31, 2015, we recorded $6 million of employee termination benefits related to the closure of our vinyl acetate ethylene ("VAE") emulsions facility in Tarragona, Spain, which did not recur in 2016. See Note 4 - Acquisitions, Dispositions and Plant Closures in the accompanying consolidated financial statements for further information.

partially offset by:

• lower Net sales.

Depreciation and amortization expense, which is included within Operating profit (loss), decreased during the year ended December 31, 2016 compared to the same period in 2015 as a result of accelerated depreciation expense of $19 million related to our VAE emulsions unit in Meredosia, Illinois and $9 million related to our VAE and conventional emulsions units in Tarragona, Spain, which did not recur in 2016. See Note 4 - Acquisitions, Dispositions and Plant Closures in the accompanying consolidated financial statements for further information.

Acetyl Intermediates

	Year Ended December 31,						%		Year Ended December 31,						%
	2017		2016		Change		Change		2016		2015		Change		Change
	(In $ millions, except percentages)
Net sales	2,669		2,441		228		9.3	%	2,441		2,744		(303	)	(11.0	)%
Net Sales Variance
Volume	(5)	%							(2)	%
Price	14	%							(10)	%
Currency	—	%							(1)	%
Other	—	%							2	%
Other (charges) gains, net	(52	)	(3	)	(49	)	1,633	%	(3	)	(300	)	297		(99.0	)%
Operating profit (loss)	424		340		84		24.7	%	340		(3	)	343		(11,433	)%
Operating margin	15.9	%	13.9	%					13.9	%	(0.1)	%
Equity in net earnings (loss) of affiliates	6		6		—		—	%	6		6		—		—	%
Depreciation and amortization	105		107		(2	)	(1.9	)%	107		123		(16	)	(13.0	)%

Year Ended December 31, 2017 Compared to Year Ended December 31, 2016

Net sales increased for the year ended December 31, 2017 compared to the same period in 2016 primarily due to:

• higher pricing due to higher feedstock costs, such as methanol, which positively impacted pricing for most of our products;

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partially offset by:

• lower volume for ethanol, which represents substantially all of the decrease in volume, due to the shutdown at our ethanol production unit in Nanjing, China.

Operating profit increased for the year ended December 31, 2017 compared to the same period in 2016 primarily due to:

• higher Net sales; and

• cost savings of $22 million, primarily related to productivity initiatives and a duty exception in the free trade agreement between Europe and Mexico;

partially offset by:

• higher raw material costs, primarily for methanol, ethylene and carbon monoxide, with methanol making up approximately one-half of the increase and ethylene and carbon monoxide making up the remainder of the increase in raw material costs;

• an unfavorable impact of $49 million to Other (charges) gains, net. During the year ended December 31, 2017, we provided notice of termination of a contract with a key raw materials supplier at our ethanol production unit in Nanjing, China. As a result, we recorded an estimated $51 million of plant/office closure costs primarily consisting of a $22 million contract termination charge and a $21 million reduction to our non-income tax receivable. See Note 18 - Other (Charges) Gains, Net in the accompanying consolidated financial statements for further information; and

• an unfavorable impact of $19 million in direct costs associated with the planned turnaround at our Clear Lake, Texas site.

Year Ended December 31, 2016 Compared to Year Ended December 31, 2015

Net sales decreased for the year ended December 31, 2016 compared to the same period in 2015 primarily due to:

• lower pricing due to lower global industry utilization and a decline in global feedstock costs, such as methanol, which negatively impacted pricing for most of our products. The impact on acetic acid, VAM and acetate esters represents approximately three-fourths of the pricing decrease; and

• lower volume for VAM, which represents all of the decrease in volume, primarily due to the expiration of a significant VAM contract.

Operating profit increased for the year ended December 31, 2016 compared to the same period in 2015 primarily due to:

• a favorable impact from Other (charges) gains, net. In December 2015, we terminated our existing agreement with a raw materials supplier in Singapore. In connection with the contract termination, we recorded $174 million to Other (charges) gains, net, which did not recur in 2016. We also recorded long-lived asset impairment losses of $123 million to fully write-off certain ethanol related assets at our acetyl facility in Nanjing, China during the three months ended December 31, 2015, which did not recur in 2016. See Note 18 - Other (Charges) Gains, Net in the accompanying consolidated financial statements for further information;

• lower energy and raw material costs, primarily for carbon monoxide and methanol; and

• cost savings of $29 million, primarily due to productivity initiatives;

partially offset by:

• lower Net sales.

Depreciation and amortization expense, which is included within Operating profit (loss), decreased during the year ended December 31, 2016 compared to the same period in 2015 as a result of $39 million in accelerated depreciation expense recorded in the prior year related to property, plant and equipment no longer in use at our ethanol technology unit in Clear Lake, Texas, which did not recur in 2016, partially offset by the impact from the startup of production at the Fairway facility in

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October 2015. See Note 4 - Acquisitions, Dispositions and Plant Closures in the accompanying consolidated financial statements for further information.

Other Activities

	Year Ended December 31,						%		Year Ended December 31,					%
	2017		2016		Change		Change		2016		2015		Change	Change
	(In $ millions)
Other (charges) gains, net	(4	)	(1	)	(3	)	300.0	%	(1	)	(9	)	8	(88.9	)%
Operating profit (loss)	(211	)	(205	)	(6	)	2.9	%	(205	)	(240	)	35	(14.6	)%
Equity in net earnings (loss) of affiliates	6		24		(18	)	(75.0	)%	24		23		1	4.3	%
Dividend income - cost investments	1		1		—		—	%	1		1		—	—	%
Depreciation and amortization	10		12		(2	)	(16.7	)%	12		11		1	9.1	%

Year Ended December 31, 2017 Compared to Year Ended December 31, 2016

Operating loss increased for the year ended December 31, 2017 compared to the same period in 2016 primarily due to:

• higher spending of approximately $60 million, primarily related to ongoing merger, acquisition and integration related costs; and

• higher incentive compensation cost of $26 million;

mostly offset by:

• a decrease in net periodic benefit cost of $85 million, primarily recorded to SG&A expenses.

Equity in net earnings (loss) of affiliates decreased for the year ended December 31, 2017 compared to the same period in 2016 primarily due to:

• a decrease in equity investment in earnings of $11 million from our InfraServ GmbH & Co. Hoechst KG affiliate as a result of an ownership change between our Advanced Engineered Materials and Other Activities segments. See Note 9 - Investment in Affiliates in the accompanying consolidated financial statements for further information; and

• a decrease in equity investment in earnings of $4 million for InfraServ GmbH & Co. Gendorf KG and InfraServ GmbH & Co. Knapsack KG associated with a reserve for dividends received from these investments since the exercise notification was received. See Note 29 - Subsequent Events in the accompanying consolidated financial statements for further information.

Year Ended December 31, 2016 Compared to Year Ended December 31, 2015

Operating loss decreased for the year ended December 31, 2016 compared to the same period in 2015 primarily due to:

• lower functional and project spending of $21 million; and

• a decrease in net periodic benefit cost of $20 million, primarily recorded to SG&A expenses.

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Liquidity and Capital Resources

Our primary source of liquidity is cash generated from operations, available cash and cash equivalents and dividends from our portfolio of strategic investments. In addition, as of December 31, 2017 we have $903 million available for borrowing under our senior unsecured revolving credit facility and $11 million available under our accounts receivable securitization facility to assist, if required, in meeting our working capital needs and other contractual obligations.

While our contractual obligations, commitments and debt service requirements over the next several years are significant, we continue to believe we will have available resources to meet our liquidity requirements, including debt service, for the next twelve months. If our cash flow from operations is insufficient to fund our debt service and other obligations, we may be required to use other means available to us such as increasing our borrowings, reducing or delaying capital expenditures, seeking additional capital or seeking to restructure or refinance our indebtedness. There can be no assurance, however, that we will continue to generate cash flows at or above current levels.

Total cash outflows for capital expenditures are expected to be in the range of $300 million to $350 million in 2018 primarily due to additional investments in growth opportunities in our Advanced Engineered Materials and Acetyl Intermediates segments.

On a stand-alone basis, Celanese and its immediate 100% owned subsidiary, Celanese US, have no material assets other than the stock of their subsidiaries and no independent external operations of their own. Accordingly, they generally depend on the cash flow of their subsidiaries and their ability to pay dividends and make other distributions to Celanese and Celanese US in order to meet their obligations, including their obligations under senior credit facilities and senior notes and to pay dividends on our Series A common stock, par value $0.0001 per share ("Common Stock").

Cash Flows

Cash and cash equivalents decreased$62 million to $576 million as of December 31, 2017 compared to December 31, 2016. As of December 31, 2017, $311 million of the $576 million of cash and cash equivalents was held by our foreign subsidiaries. Under the TCJA, we have incurred a charge associated with the repatriation of previously unremitted foreign earnings, including foreign held cash. These funds are largely accessible, if needed in the US to fund operations. See Note 19 - Income Taxes in the accompanying consolidated financial statements for further information.

• Net Cash Provided by (Used in) Operating Activities

Year Ended December 31, 2017 Compared to Year Ended December 31, 2016

Net cash provided by operating activities decreased$90 million to $803 million for the year ended December 31, 2017 compared to $893 million for the same period in 2016. Net cash provided by operations for the year ended December 31, 2017 decreased primarily due to:

• a decrease in net earnings; and

• unfavorable trade working capital of $37 million primarily due to an increase in accounts receivable and inventory related to SOFTER.

Year Ended December 31, 2016 Compared to Year Ended December 31, 2015

Net cash provided by operating activities increased$31 million to $893 million for the year ended December 31, 2016 compared to $862 million for the same period in 2015. Net cash provided by operations for the year ended December 31, 2016 increased primarily due to:

• an increase in net earnings;

largely offset by:

• an increase in pension plan and other postretirement benefit plan contributions of $287 million;

• unfavorable trade working capital of $56 million primarily due to an increase in accounts receivable; and

• lower dividends from our equity investments in affiliates of $45 million.

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• Net Cash Provided by (Used in) Investing Activities

Year Ended December 31, 2017 Compared to Year Ended December 31, 2016

Net cash used in investing activities increased $110 million to $549 million for the year ended December 31, 2017 compared to $439 million for the same period in 2016, primarily due to:

• a net increase in cash outflows of $91 million related to the acquisition of Nilit in May 2017.

Year Ended December 31, 2016 Compared to Year Ended December 31, 2015

Net cash used in investing activities decreased $119 million to $439 million for the year ended December 31, 2016 compared to $558 million for the same period in 2015, primarily due to:

• a decrease in capital expenditures of $288 million related to Fairway, which was completed in 2015;

partially offset by:

• an increase in cash outflows of $178 million related to the acquisition of SOFTER in December 2016.

• Net Cash Provided by (Used in) Financing Activities

Year Ended December 31, 2017 Compared to Year Ended December 31, 2016

Net cash used in financing activities decreased $408 million to $351 million for the year ended December 31, 2017 compared to $759 million for the year ended December 31, 2016. The decrease in cash used in financing activities is primarily due to:

• an increase in net borrowings on short-term debt of $558 million, primarily as a result of borrowings under our senior unsecured revolving credit facility and accounts receivable securitization facility during the year ended December 31, 2017, as well as repayments of borrowings under our senior unsecured revolving credit facility during the year ended December 31, 2016, which did not recur in the current year;

partially offset by:

• a decrease in net proceeds from long-term debt of $108 million, primarily due to the refinancing of our senior secured credit facilities during the year ended December 31, 2016, partially offset by the senior unsecured debt issuance during the year ended December 31, 2017, as discussed below; and

• an increase in Common Stock cash dividends of $40 million. During the year ended December 31, 2017, we increased our Common Stock quarterly cash dividend rate from $0.36 to $0.46 per share.

Year Ended December 31, 2016 Compared to Year Ended December 31, 2015

Net cash used in financing activities increased $693 million to $759 million for the year ended December 31, 2016 compared to $66 million for the year ended December 31, 2015. The increase in cash used in financing activities is primarily due to:

• an increase of $350 million in net short-term borrowings under our previous senior secured revolving credit facility for the year ended December 31, 2015, which were repaid in full during the year ended December 31, 2016, as discussed below;

• a net decrease of $238 million in contributions received from, and distributions to, Mitsui; and

• an increase of $80 million in share repurchases of our Common Stock;

partially offset by:

• an increase in net proceeds from long-term debt of $406 million primarily as a result of issuing €750 million in principal amount of 1.125% Notes, as discussed below.

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In addition, exchange rates had a favorable impact of $35 million on cash and cash equivalents for the year ended December 31, 2017 and unfavorable impacts of $24 million and $51 million on cash and cash equivalents for the years ended December 31, 2016 and 2015, respectively.

Debt and Other Obligations

• Senior Credit Facilities

In July 2016, Celanese, Celanese US and certain subsidiaries entered into a new senior credit agreement ("Credit Agreement") consisting of a $500 million senior unsecured term loan and a $1.0 billion senior unsecured revolving credit facility (with a letter of credit sublimit), each maturing in 2021. The margin for borrowings under the senior unsecured term loan and the senior unsecured revolving credit facility was 1.5% above LIBOR at our current credit ratings. The Credit Agreement is guaranteed by Celanese, Celanese US and substantially all of its domestic subsidiaries ("the Subsidiary Guarantors"). The proceeds from the new senior unsecured term loan and $409 million of borrowings under the new senior unsecured revolving credit facility were used to repay our Term C-2 and C-3 loans under our previous senior secured credit facilities. We borrowed $528 million and repaid $431 million under our senior unsecured revolving credit facility during the year ended December 31, 2017.

• Senior Notes

We have outstanding senior unsecured notes, issued in public offerings registered under the Securities Act of 1933 ("Securities Act"), as amended, as follows (collectively, the "Senior Notes"):

Senior Notes	Issue Date	Principal	Interest Rate	Interest Pay Dates		Maturity Date
		(In millions)	(In percentages)
1.250% Notes	December 2017	€300	1.250	February 11		February 11, 2025
1.125% Notes	September 2016	€750	1.125	September 26		September 26, 2023
3.250% Notes	September 2014	€300	3.250	April 15	October 15	October 15, 2019
4.625% Notes	November 2012	$500	4.625	March 15	September 15	November 15, 2022
5.875% Notes	May 2011	$400	5.875	June 15	December 15	June 15, 2021

The Senior Notes were issued by Celanese US and are guaranteed on a senior unsecured basis by Celanese and the Subsidiary Guarantors. Celanese US may redeem some or all of each of the Senior Notes, prior to their respective maturity dates, at a redemption price of 100% of the principal amount, plus a "make-whole" premium as specified in the applicable indenture, plus accrued and unpaid interest, if any, to the redemption date.

On December 11, 2017, Celanese US completed the offering of the 1.250% Notes in a public offering registered under the Securities Act. The 1.250% Notes were issued under a base indenture dated May 6, 2011. The 1.250% Notes were issued at a discount to par at a price of 99.810%. Net proceeds from the issuance of the 1.250% Notes were used to make a discretionary contribution into our US pension plans of $316 million and for general corporate purposes.

In September 2016, Celanese US completed the offering of the 1.125% Notes in a public offering registered under the Securities Act. The 1.125% Notes were issued at a discount to par at a price of 99.713%. Net proceeds from the sale of the 1.125% Notes were used to repay $411 million of outstanding borrowings under the new senior unsecured revolving credit facility and for general corporate purposes.

• Accounts Receivable Securitization Facility

In July 2016, certain of our subsidiaries entered into an amendment of our accounts receivable securitization facility, extending its maturity to July 2019 and decreasing the available amount to $120 million. We borrowed $85 million and repaid $5 million during the year ended December 31, 2017.

Our material financing arrangements contain customary covenants, including the maintenance of certain financial ratios, events of default and change of control provisions. Failure to comply with these covenants, or the occurrence of any other event of default, could result in acceleration of the borrowings and other financial obligations. We are in compliance with all of the covenants related to our debt agreements as of December 31, 2017.

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• Acetate Tow Joint Venture

On June 18, 2017, Celanese, through various subsidiaries, entered into an agreement with affiliates of the Blackstone Entities to form a joint venture which combines substantially all the operations of our cellulose derivatives business and the operations of the Rhodia Acetow cellulose acetate business owned by the Blackstone Entities. Closing of the transaction is subject to customary closing conditions. We have received regulatory approval in four out of six jurisdictions requiring approval, and the EC has moved into its Phase II investigation of the ongoing merger review process. Under the standard review process of a Phase II investigation, we received a statement of objections from the EC. This statement of objections sets out the provisional position of the EC and does not prejudge the final outcome of the case.

In connection with the agreement, the joint venture with the Blackstone Entities obtained commitments for credit facilities aggregating $2.4 billion to be entered into by the joint venture entities at the closing consisting of (i) senior secured ($135 million) and senior unsecured ($65 million) revolving credit facilities in an aggregate principal amount of $200 million, (ii) senior secured term loan facilities in an aggregate principal amount of $1.0 billion, (iii) a senior unsecured bridge facility in an aggregate principal amount of $800 million, which bridge facility will backstop the proposed issuance of $800 million senior unsecured notes by a joint venture subsidiary, and (iv) a senior unsecured term loan facility in an aggregate principal amount of $400 million. The credit facilities will be guaranteed by certain of the subsidiaries of the respective borrowers; however, only the $65 million senior unsecured revolving credit facility and the $400 million senior unsecured term loan credit facility will be guaranteed by Celanese. Approximately $2.2 billion of the proceeds of the debt financing are expected to be used, in part, to repay certain of the parties' existing indebtedness and a $1.6 billion dividend to Celanese. We plan to use the proceeds of the dividend for general corporate purposes. Additionally, we anticipate that we will incur costs of approximately $50 million prior to the closing to carve out assets and entities in anticipation of contributing these to the joint venture. See Note 4 - Acquisitions, Dispositions and Plant Closures in the accompanying consolidated financial statements for further information.

See Note 14 - Debt in the accompanying consolidated financial statements for further information.

Share Capital

Our Board of Directors follows a policy of declaring, subject to legally available funds, a quarterly cash dividend on each share of our Common Stock unless the Board of Directors, in its sole discretion, determines otherwise. The amount available to us to pay cash dividends is not currently restricted by our existing senior credit facility or our indentures governing our senior unsecured notes.

On February 8, 2018, we declared a quarterly cash dividend of $0.46 per share on our Common Stock amounting to $62 million. The cash dividend will be paid on March 2, 2018 to holders of record as of February 20, 2018.

Our Board of Directors has authorized the aggregate repurchase of $3.9 billion of our Common Stock since February 2008, including a $1.5 billion increase which was approved on July 17, 2017 by our Board of Directors. These authorizations give management discretion in determining the timing and conditions under which shares may be repurchased. This repurchase program does not have an expiration date. During the year ended December 31, 2017, we spent $500 million on repurchased shares of our Common Stock. As of December 31, 2017, we had $1.5 billion remaining under authorizations by our Board of Directors.

See Note 17 - Stockholders' Equity in the accompanying consolidated financial statements for further information.

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Contractual Debt and Cash Obligations

The following table sets forth our fixed contractual debt and cash obligations as of December 31, 2017.

			Payments due by period
	Total		Less Than 1 Year	Years 2 & 3	Years 4 & 5	After 5 Years
	(In $ millions)
Fixed Contractual Debt Obligations
Senior notes	2,516		—	360	900	1,256
Senior unsecured term loan	494		32	100	362	—
Interest payments on debt and other obligations	553	(1)	119	206	127	101
Capital lease obligations	208		31	54	55	68
Other debt	443	(2)	263	3	3	174
Total	4,214		445	723	1,447	1,599
Operating leases	343		54	84	50	155
Uncertain tax positions, including interest and penalties	156		—	—	—	156	(3)
Unconditional purchase obligations	1,793	(4)	382	474	523	414
Pension and other postretirement funding obligations	470		49	96	94	231
Environmental and asset retirement obligations	104		33	25	11	35
Total	7,080		963	1,402	2,125	2,590

______________________________

⁽¹⁾  Future interest expense is calculated using the rate in effect on December 31, 2017.

⁽²⁾  Other debt is primarily made up of fixed rate pollution control and industrial revenue bonds, short-term borrowings from affiliated companies, our revolving credit facility, our accounts receivable securitization facility and other bank obligations.

⁽³⁾  Due to uncertainties in the timing of the effective settlement of tax positions with the respective taxing authorities, we are unable to determine the timing of payments related to our uncertain tax obligations, including interest and penalties. These amounts are therefore reflected in "After 5 Years".

⁽⁴⁾  Unconditional purchase obligations primarily represent the take-or-pay provisions included in certain long-term purchase agreements. We do not expect to incur material losses under these arrangements. These amounts also include other purchase obligations such as maintenance and service agreements, energy and utility agreements, consulting contracts, software agreements and other miscellaneous agreements and contracts, obtained via a survey of Celanese.

Contractual Guarantees and Commitments

As of December 31, 2017, we have standby letters of credit of $29 million and bank guarantees of $12 million outstanding, which are irrevocable obligations of an issuing bank that ensure payment to third parties in the event that certain subsidiaries fail to perform in accordance with specified contractual obligations. The likelihood is remote that material payments will be required under these agreements.

See Note 14 - Debt in the accompanying consolidated financial statements for a description of the guarantees under our Senior Notes and Credit Agreement.

See Note 24 - Commitments and Contingencies in the accompanying consolidated financial statements for a discussion of commitments and contingencies related to legal and regulatory proceedings.

Off-Balance Sheet Arrangements

We have not entered into any material off-balance sheet arrangements.

Market Risks

See Item 7A. Quantitative and Qualitative Disclosure about Market Riskfor further information.

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Critical Accounting Policies and Estimates

Our consolidated financial statements are based on the selection and application of significant accounting policies. The preparation of consolidated financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of net sales, expenses and allocated charges during the reporting period. Actual results could differ from those estimates. However, we are not currently aware of any reasonably likely events or circumstances that would result in materially different results.

We believe the following accounting policies and estimates are critical to understanding the financial reporting risks present in the current economic environment. These matters, and the judgments and uncertainties affecting them, are also essential to understanding our reported and future operating results. See Note 2 - Summary of Accounting Policies in the accompanying consolidated financial statements for further information.

• Recoverability of Long-Lived Assets

Recoverability of Goodwill and Indefinite-Lived Assets

We assess goodwill for impairment at the reporting unit level. Our reporting units are either our operating business segments or one level below our operating business segments for which discrete financial information is available and for which operating results are regularly reviewed by business segment management and the chief operating decision maker. Our operating business segments have been designated as our reporting units and include our engineered materials, cellulose derivatives, food ingredients, emulsion polymers, EVA polymers and intermediate chemistry businesses. We assess the recoverability of the carrying amount of our goodwill and other indefinite-lived intangible assets annually during the third quarter of our fiscal year using June 30 balances or whenever events or changes in circumstances indicate that the carrying amount of the asset may not be fully recoverable.

When assessing the recoverability of goodwill and other indefinite-lived intangible assets, we may first assess qualitative factors in determining whether it is more likely than not that the fair value of a reporting unit or other indefinite-lived intangible asset is less than its carrying amount. After assessing qualitative factors, if we determine that it is not more likely than not that the fair value of a reporting unit or other indefinite-lived intangible asset is less than its carrying amount, then performing a quantitative assessment is not required. If an initial qualitative assessment indicates that it is more likely than not the carrying amount exceeds the fair value of a reporting unit or other indefinite-lived intangible asset, a quantitative analysis will be performed. We may also elect to bypass the qualitative assessment and proceed directly to a quantitative analysis depending on the facts and circumstances.

In performing a quantitative analysis, recoverability of goodwill for each reporting unit is measured using a discounted cash flow model incorporating discount rates commensurate with the risks involved. Use of a discounted cash flow model is common practice in assessing impairment in the absence of available transactional market evidence to determine the fair value. The key assumptions used in the discounted cash flow valuation model include discount rates, growth rates, tax rates, cash flow projections and terminal value rates. Discount rates, growth rates and cash flow projections are the most sensitive and susceptible to change as they require significant management judgment. We may engage third-party valuation consultants to assist with this process. The valuation consultants assess fair value by equally weighting a combination of two market approaches (market multiple analysis and comparable transaction analysis) and the discounted cash flow approach. Discount rates are determined by using a weighted average cost of capital ("WACC"). The WACC considers market and industry data as well as company-specific risk factors for each reporting unit in determining the appropriate discount rate to be used. The discount rate utilized for each reporting unit is indicative of the return an investor would expect to receive for investing in such a business. Operational management, considering industry and company-specific historical and projected data, develops growth rates and cash flow projections for each reporting unit. Terminal value rate determination follows common methodology of capturing the present value of perpetual cash flow estimates beyond the last projected period assuming a constant WACC and low long-term growth rates. If the calculated fair value is less than the current carrying amount, an impairment loss is recorded in the amount by which the carrying amount exceeds the reporting unit's fair value. An impairment loss cannot exceed the carrying amount of goodwill assigned to a reporting unit but may indicate certain long-lived and amortizable intangible assets associated with the reporting unit may require additional impairment testing.

Management tests other indefinite-lived intangible assets quantitatively utilizing the relief from royalty method under the income approach to determine the estimated fair value for each indefinite-lived intangible asset. The relief from royalty method estimates our theoretical royalty savings from ownership of the intangible asset. Key assumptions used in this model include discount rates, royalty rates, growth rates, tax rates, sales projections and terminal value rates. Discount rates, royalty rates,

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growth rates and sales projections are the assumptions most sensitive and susceptible to change as they require significant management judgment. Discount rates used are similar to the rates estimated by the WACC considering any differences in company-specific risk factors. Royalty rates are established by management and are periodically substantiated by third-party valuation consultants. Operational management, considering industry and company-specific historical and projected data, develops growth rates and sales projections associated with each indefinite-lived intangible asset. Terminal value rate determination follows common methodology of capturing the present value of perpetual sales projections beyond the last projected period assuming a constant WACC and low long-term growth rates.

Valuation methodologies utilized to evaluate goodwill and indefinite-lived intangible assets for impairment were consistent with prior periods. We periodically engage third-party valuation consultants to assist us with this process. Specific assumptions discussed above are updated at the date of each test to consider current industry and company-specific risk factors from the perspective of a market participant. The current business environment is subject to evolving market conditions and requires significant management judgment to interpret the potential impact to our assumptions. To the extent that changes in the current business environment result in adjusted management projections, impairment losses may occur in future periods.

See Note 11 - Goodwill and Intangible Assets, Net in the accompanying consolidated financial statements for further information.

• Environmental Liabilities

We manufacture and sell a diverse line of chemical products throughout the world. Accordingly, our operations are subject to various hazards incidental to the production of industrial chemicals including the use, handling, processing, storage and transportation of hazardous materials. We recognize losses and accrue liabilities relating to environmental matters if available information indicates that it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. Depending on the nature of the site, we accrue through 15 years, unless we have government orders or other agreements that extend beyond 15 years. We estimate environmental liabilities on a case-by-case basis using the most current status of available facts, existing technology, presently enacted laws and regulations and prior experience in remediation of contaminated sites. Recoveries of environmental costs from other parties are recorded as assets when their receipt is deemed probable.

An environmental reserve related to cleanup of a contaminated site might include, for example, a provision for one or more of the following types of costs: site investigation and testing costs, cleanup costs, costs related to soil and water contamination resulting from tank ruptures and post-remediation monitoring costs. These undiscounted reserves do not take into account any claims or recoveries from insurance. The measurement of environmental liabilities is based on our periodic estimate of what it will cost to perform each of the elements of the remediation effort. We utilize third parties to assist in the management and development of cost estimates for our sites. Changes to environmental regulations or other factors affecting environmental liabilities are reflected in the consolidated financial statements in the period in which they occur.

See Note 16 - Environmental in the accompanying consolidated financial statements for further information.

• Benefit Obligations

The amounts recognized in the consolidated financial statements related to pension and other postretirement benefits are determined on an actuarial basis. Various assumptions are used in the calculation of the actuarial valuation of the employee benefit plans. These assumptions include the discount rate, compensation levels, expected long-term rates of return on plan assets and trends in health care costs. In addition, actuarial consultants use factors such as withdrawal and mortality rates to estimate the projected benefit obligation. The actuarial assumptions used may differ materially from actual results due to changing market and economic conditions, higher or lower withdrawal rates or longer or shorter life spans of participants. These differences may result in a significant impact to the amount of net periodic benefit cost recorded in future periods.

Pension assumptions are reviewed annually in the fourth quarter of each fiscal year and whenever a plan is required to be remeasured. Assumptions are reviewed on a plan and country-specific basis by third-party actuaries and senior management. Such assumptions are adjusted as appropriate to reflect changes in market rates and outlook.

Beginning in 2016, we elected to change the method used to estimate the service and interest cost components of net periodic benefit cost for our significant defined benefit pension plans and other postretirement benefit plans. Previously, we estimated the service and interest cost components utilizing a single weighted average discount rate derived from the yield curve used to measure the benefit obligation at the beginning of the period. We elected to use a full yield curve approach in the estimation of these components of net periodic benefit cost by applying the specific spot rates along the yield curve used in the determination of the benefit obligation to the relevant projected cash flows. This change improves the correlation between projected benefit

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cash flows and the corresponding yield curve spot rates and provides a more precise measurement of service and interest costs. This change does not affect the measurement of our total benefit obligations as the change in service and interest cost will be completely offset in the annual actuarial (gain) loss reported. We accounted for this change as a change in estimate and, accordingly, accounted for it prospectively beginning in 2016.

See Note 15 - Benefit Obligations in the accompanying consolidated financial statements for further information.

The estimated change in pension and postretirement net periodic benefit cost that would occur in 2018 from a change in the indicated assumptions are as follows:

	Change in Rate		Impact on Net Periodic Benefit Cost
			(In $ millions)
US Pension Benefits
Decrease in the discount rate	0.50	%	(10	)
Decrease in the long-term expected rate of return on plan assets(1)	0.50	%	14
US Postretirement Benefits
Decrease in the discount rate	0.50	%	—
Increase in the annual health care cost trend rates	1.00	%	—
Non-US Pension Benefits
Decrease in the discount rate	0.50	%	(1	)
Decrease in the long-term expected rate of return on plan assets	0.50	%	2
Non-US Postretirement Benefits
Decrease in the discount rate	0.50	%	—
Increase in the annual health care cost trend rates	1.00	%	—

______________________________

⁽¹⁾  Excludes nonqualified pension plans.

• Accounting for Commitments and Contingencies

We routinely assess the likelihood of any adverse judgments or outcomes to legal and regulatory proceedings, lawsuits, claims, and investigations, incidental to the normal conduct of our past and current business, as well as ranges of probable and reasonably estimable losses. Reasonable estimates involve judgments made by us after considering a broad range of information including: notifications, prior settlements, demands, which have been received from a regulatory authority or private party, estimates performed by independent consultants and outside counsel, available facts, identification of other potentially responsible parties and their ability to contribute, as well as prior experience. A determination of the amount of loss contingency required, if any, is recorded if probable and estimable after careful analysis of each individual matter. The required reserves may change in the future due to new developments in each matter and as additional information becomes available. Due to the inherent subjectivity of assessments and unpredictability of outcomes of legal proceedings, our litigation accruals and estimates of possible loss or range of possible loss may not represent the ultimate loss to us from legal proceedings.

See Note 24 - Commitments and Contingencies in the accompanying consolidated financial statements for further information.

• Income Taxes

We regularly review our deferred tax assets for recoverability and establish a valuation allowance as needed. In forming our judgment regarding the recoverability of deferred tax assets related to deductible temporary differences and tax attribute carryforwards, we give weight to positive and negative evidence based on the extent to which the forms of evidence can be objectively verified. We attach the most weight to historical earnings due to its verifiable nature. Weight is attached to tax planning strategies if the strategies are prudent and feasible and implementable without significant obstacles. Less weight is attached to forecasted future earnings due to its subjective nature, and expected timing of reversal of taxable temporary differences is given little weight unless the reversal of taxable and deductible temporary differences coincide. Valuation allowances are established primarily on net operating loss carryforwards and other deferred tax assets in the US, Luxembourg, Spain, China, Singapore, the United Kingdom, Canada and France. We have appropriately reflected increases and decreases in our valuation allowance based on the overall weight of positive versus negative evidence on a jurisdiction by jurisdiction basis.

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The recoverability of deferred tax assets and the recognition and measurement of uncertain tax positions are subject to various assumptions and management judgment. If actual results differ from the estimates made by management in establishing or maintaining valuation allowances against deferred tax assets, the resulting change in the valuation allowance would generally impact earnings or Other comprehensive income depending on the nature of the respective deferred tax asset. In addition, the positions taken with regard to tax contingencies may be subject to audit and review by tax authorities, which may result in future taxes, interest and penalties.

See Note 19 - Income Taxes in the accompanying consolidated financial statements for further information.

Recent Accounting Pronouncements

See Note 3 - Recent Accounting Pronouncements in the accompanying consolidated financial statements for information regarding recent accounting pronouncements.

Item 7A.  Quantitative and Qualitative Disclosures About Market Risk

Market Risks

Our financial market risk consists principally of exposure to currency exchange rates, interest rates and commodity prices. Exchange rate and interest rate risks are managed with a variety of techniques, including use of derivatives. We have in place policies of hedging against changes in currency exchange rates, interest rates and commodity prices as described below.

See Note 2 - Summary of Accounting Policies in the accompanying consolidated financial statements for further information regarding our derivative and hedging instruments accounting policies related to financial market risk.

See Note 22 - Derivative Financial Instruments in the accompanying consolidated financial statements for further information regarding our market risk management and the related impact on our financial position and results of operations.

• Foreign Currency Forwards and Swaps

A portion of our assets, liabilities, net sales and expenses are denominated in currencies other than the US dollar. Fluctuations in the value of these currencies against the US dollar can have a direct and material impact on the business and financial results. For example, a decline in the value of the Euro versus the US dollar results in a decline in the US dollar value of our sales and earnings denominated in Euros due to translation effects. Likewise, an increase in the value of the Euro versus the US dollar would result in an opposite effect. We estimate that a one cent Euro/US dollar change in the exchange rate would impact our earnings by $5 million annually.

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Item 8.  Financial Statements and Supplementary Data

Our consolidated financial statements and supplementary data are included in Item 15. Exhibits and Financial Statement Schedules of this Annual Report on Form 10-K.

Quarterly Financial Information

For a discussion of material events affecting performance in each quarter, see Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations.

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS

	Three Months Ended
	March 31, 2017		June 30, 2017		September 30, 2017		December 31, 2017
	(Unaudited) (In $ millions, except per share data)
Net sales	1,471		1,510		1,566		1,593
Gross profit	352		367		385		411
Other (charges) gains, net	(55	)	(3	)	—		(2	)
Operating profit (loss)	192		240		252		217		(1)
Earnings (loss) from continuing operations before tax	240		281		289		265
Amounts attributable to Celanese Corporation
Earnings (loss) from continuing operations	183		239		230		204
Earnings (loss) from discontinued operations	—		(8	)	(4	)	(1	)
Net earnings (loss)	183		231		226		203
Net earnings (loss) per share — basic	1.30		1.67		1.65		1.49
Net earnings (loss) per share — diluted	1.30		1.66		1.65		1.49

	Three Months Ended
	March 31, 2016		June 30, 2016		September 30, 2016		December 31, 2016
	(Unaudited) (In $ millions, except per share data)
Net sales	1,404		1,351		1,323		1,311
Gross profit	390		338		355		322
Other (charges) gains, net	(5	)	(4	)	(3	)	1
Operating profit (loss)	287		243		246		117	(1)
Earnings (loss) from continuing operations before tax	318		275		281		156
Amounts attributable to Celanese Corporation
Earnings (loss) from continuing operations	256		221		265		160
Earnings (loss) from discontinued operations	1		—		(3	)	—
Net earnings (loss)	257		221		262		160
Net earnings (loss) per share — basic	1.74		1.51		1.82		1.13
Net earnings (loss) per share — diluted	1.73		1.50		1.81		1.12

______________________________

⁽¹⁾  Includes $46 million and $103 million of net actuarial losses related to defined benefit pension and other postretirement obligations in 2017 and 2016, respectively. See Note 15 - Benefit Obligations in the accompanying consolidated financial statements for further information.

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

None.

Item 9A.  Controls and Procedures

Under the supervision and with the participation of our management, including the Chief Executive Officer and Acting Chief Financial Officer, we have evaluated the effectiveness of our disclosure controls and procedures pursuant to Rule 13a-15(b) under the Securities Exchange Act of 1934, as amended, as of the end of the period covered by this Annual Report on Form 10-K. Based on that evaluation, as of December 31, 2017, the Chief Executive Officer and Acting Chief Financial Officer have concluded that our disclosure controls and procedures are effective.

Changes in Internal Control Over Financial Reporting

During the three months ended December 31, 2017, there were no changes in our internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Report of Management on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting for the Company. Internal control over financial reporting is a process to provide reasonable assurance regarding the reliability of our financial reporting for external purposes in accordance with accounting principles generally accepted in the United States of America. Internal control over financial reporting includes maintaining records that in reasonable detail accurately and fairly reflect our transactions; providing reasonable assurance that transactions are recorded as necessary for preparation of our consolidated financial statements; providing reasonable assurance that receipts and expenditures of company assets are made in accordance with management authorization; and providing reasonable assurance that unauthorized acquisition, use or disposition of company assets that could have a material effect on our consolidated financial statements would be prevented or detected on a timely basis. Because of its inherent limitations, internal control over financial reporting is not intended to provide absolute assurance that a misstatement of our consolidated financial statements would be prevented or detected.

Management conducted an evaluation of the effectiveness of our internal control over financial reporting based on the framework in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that the Company's internal control over financial reporting was effective as of December 31, 2017. The Company's independent registered public accounting firm, KPMG LLP, has issued an audit report on the effectiveness of the Company's internal control over financial reporting. Their report follows on page 68.

Item 9B.  Other Information

None.

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PART III

Item 10.  Directors, Executive Officers and Corporate Governance

The information required by this Item 10 is incorporated herein by reference from the subsections of "Governance" captioned "Item 1: Election of Directors," "Director Nominees," "Directors Continuing in Office," "Board and Committee Governance," "Additional Governance Features," and the sections "Stock Ownership Information – Section 16(a) Beneficial Ownership Reporting Compliance" and "Questions and Answers – Company Documents, Communications and Stockholder Proposals" of the Company's definitive proxy statement for the 2018 annual meeting of stockholders to be filed with the Securities and Exchange Commission pursuant to Regulation 14A under the Securities Exchange Act of 1934, as amended (the "2018 Proxy Statement"). Information about executive officers of the Company is contained in Part I of this Annual Report.

Codes of Ethics

The Company has adopted a Business Conduct Policy for directors, officers and employees along with a Financial Code of Ethics for its principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions. These codes are available on the corporate governance portal of the Company's investor relations website at http://www.celanese.com. The Company intends to satisfy the disclosure requirements under Item 5.05 of Form 8-K regarding amendments to and waivers from these codes by posting such information on the same website.

Item 11.  Executive Compensation

The information required by this Item 11 is incorporated herein by reference from the section "Governance – Director Compensation" and the subsections of "Executive Compensation" captioned "Compensation Discussion and Analysis," "Compensation Risk Assessment," "Compensation and Management Development Committee Report," "Compensation Committee Interlocks and Insider Participation" and "Compensation Tables" of the 2018 Proxy Statement.

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

The information with respect to beneficial ownership required by this Item 12 is incorporated herein by reference from the section captioned "Stock Ownership Information – Principal Stockholders and Beneficial Owners" of the 2018 Proxy Statement.

Equity Compensation Plans

Securities Authorized for Issuance Under Equity Compensation Plans

The following information is provided as of December 31, 2017 with respect to equity compensation plans:

Plan Category	Number of Securities to be Issued upon Exercise of Outstanding Options, Warrants and Rights		Weighted Average Exercise Price of Outstanding Options, Warrants and Rights		Number of Securities Remaining Available for Future Issuance Under Equity Compensation Plans (excluding securities reflected in column (a))
	(a)		(b)		(c)
Equity compensation plans approved by security holders	1,701,713	(1)	$	45.56	19,490,511	(2)

___________________________

⁽¹⁾  Includes 1,667,573 restricted stock units ("RSUs") granted under the Celanese Corporation 2009 Global Incentive Plan, as amended and restated April 19, 2012 (the "2009 Plan"), including shares that may be issued pursuant to outstanding performance-based RSUs, assuming currently estimated maximum potential performance (except that, for the performance-based RSUs with a performance period ending December 31, 2017, assuming actual performance); actual shares may vary, depending on actual performance. If the performance-based RSUs included in this total vest at the target performance level (as opposed to the maximum potential performance), the aggregate awards outstanding would be 1,102,556. Also includes 37,758 share equivalents attributable to compensation deferred by non-management directors participating in the Company's 2008 Deferred Compensation Plan (and dividends applied to previous deferrals) and distributable in the form of shares of the Company's Series A common stock, par value $0.0001 per share ("Common Stock") under the 2009 Plan. Upon vesting, a share of the Company's Common Stock is issued for each restricted stock unit. Column (b) does not take these awards into account because they do not have an exercise price.

⁽²⁾  Includes shares available for future issuance under the Celanese Corporation 2009 Employee Stock Purchase Plan approved by stockholders on April 23, 2009 (the "ESPP"). As of December 31, 2017, an aggregate of 13,826,883 shares of our Common Stock were available for future issuance under the ESPP. As of December 31, 2017, 173,117 shares have been offered for purchase under the ESPP.

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

The information required by this Item 13 is incorporated herein by reference from the section captioned "Governance – Director Independence and Related Person Transactions" of the 2018 Proxy Statement.

Item 14.  Principal Accounting Fees and Services

The information required by this Item 14 is incorporated herein by reference from the section captioned "Audit Matters – Item 3: Ratification of Independent Registered Public Accounting Firm" of the 2018 Proxy Statement.

63

PART IV

Item 15.  Exhibits and Financial Statement Schedules

1.  Financial Statements. The report of our independent registered public accounting firm and our consolidated financial statements are listed below and begin on page 68 of this Annual Report on Form 10-K.

	Page Number
Report of Independent Registered Public Accounting Firm	68
Consolidated Statements of Operations	70
Consolidated Statements of Comprehensive Income (Loss)	71
Consolidated Balance Sheets	72
Consolidated Statements of Equity	73
Consolidated Statements of Cash Flows	74
Notes to the Consolidated Financial Statements	75

2.  Financial Statement Schedules.

The financial statement schedules required by this item, if any, are included as Exhibits to this Annual Report on Form 10-K.

3.  Exhibit List.

See Index to Exhibits following our consolidated financial statements contained in this Annual Report on Form 10-K.

64

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.

CELANESE CORPORATION
By:	/s/ MARK C. ROHR
Name:	Mark C. Rohr
Title:	Chairman of the Board of Directors and Chief Executive Officer
Date:	February 9, 2018

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Mark C. Rohr and Kevin S. Oliver, and each of them, his or her true and lawful attorney-in-fact and agent, each with full power of substitution and resubstitution to sign in his or her name, place and stead, in any and all capacities, to do any and all things and execute any and all instruments that any such attorney-in-fact may deem necessary or advisable under the Securities Exchange Act of 1934 and any rules, regulations and requirements of the US Securities and Exchange Commission in connection with the Annual Report on Form 10-K for the fiscal year ended December 31, 2017 and any and all amendments hereto, as fully for all intents and purposes as he or she might or could do in person, and hereby ratifies and confirms all that such said attorney-in-fact, acting alone, or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

Signature	Title	Date
/s/ MARK C. ROHR	Director, Chairman of the Board of Directors and Chief Executive Officer (Principal Executive Officer)	February 9, 2018
Mark C. Rohr
/s/ KEVIN S. OLIVER	Acting Chief Financial Officer and Chief Accounting Officer (Person performing the functions of the Principal Financial Officer; Principal Accounting Officer)	February 9, 2018
Kevin S. Oliver
/s/ JEAN S. BLACKWELL	Director	February 9, 2018
Jean S. Blackwell
/s/ WILLIAM M. BROWN	Director	February 9, 2018
William M. Brown
/s/ BENNIE W. FOWLER	Director	February 9, 2018
Bennie W. Fowler
/s/ EDWARD G. GALANTE	Director	February 9, 2018
Edward G. Galante
/s/ KATHRYN M. HILL	Director	February 9, 2018
Kathryn M. Hill

65

Signature	Title	Date
/s/ DAVID F. HOFFMEISTER	Director	February 9, 2018
David F. Hoffmeister
/s/ JAY V. IHLENFELD	Director	February 9, 2018
Jay V. Ihlenfeld
/s/ JOHN K. WULFF	Director	February 9, 2018
John K. Wulff

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CELANESE CORPORATION AND SUBSIDIARIES

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

	Page Number
Report of Independent Registered Public Accounting Firm	68
Consolidated Statements of Operations for the years ended December 31, 2017, 2016 and 2015	70
Consolidated Statements of Comprehensive Income (Loss) for the years ended December 31, 2017, 2016 and 2015	71
Consolidated Balance Sheets as of December 31, 2017 and 2016	72
Consolidated Statements of Equity for the years ended December 31, 2017, 2016 and 2015	73
Consolidated Statements of Cash Flows for the years ended December 31, 2017, 2016 and 2015	74
Notes to the Consolidated Financial Statements	75
1. Description of the Company and Basis of Presentation	75
2. Summary of Accounting Policies	75
3. Recent Accounting Pronouncements	84
4. Acquisitions, Dispositions and Plant Closures	85
5. Ventures and Variable Interest Entities	88
6. Marketable Securities, at Fair Value	90
7. Receivables, Net	90
8. Inventories	90
9. Investments in Affiliates	90
10. Property, Plant and Equipment, Net	93
11. Goodwill and Intangible Assets, Net	93
12. Current Other Liabilities	95
13. Noncurrent Other Liabilities	95
14. Debt	96
15. Benefit Obligations	100
16. Environmental	109
17. Stockholders' Equity	111
18. Other (Charges) Gains, Net	113
19. Income Taxes	115
20. Management Compensation Plans	119
21. Leases	121
22. Derivative Financial Instruments	122
23. Fair Value Measurements	124
24. Commitments and Contingencies	126
25. Supplemental Cash Flow Information	127
26. Segment Information	127
27. Earnings (Loss) Per Share	130
28. Consolidating Guarantor Financial Information	131
29. Subsequent Events	143

67

Report of Independent Registered Public Accounting Firm

To The Stockholders and Board of Directors

Celanese Corporation:

Opinions on the Consolidated Financial Statements and Internal Control Over Financial Reporting

We have audited the accompanying consolidated balance sheets of Celanese Corporation and subsidiaries (the Company) as of December 31, 2017 and 2016, the related consolidated statements of operations, comprehensive income (loss), equity, and cash flows for each of the years in the three-year period ended December 31, 2017, and the related notes (collectively, the consolidated financial statements). We also have audited the Company's internal control over financial reporting as of December 31, 2017, based on the criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

In our opinion, the consolidated financial statements referred to above, present fairly, in all material respects, the financial position of the Company as of December 31, 2017 and 2016, and the results of its operations and its cash flows for each of the years in the three-year period ended December 31, 2017, in conformity with U.S. generally accepted accounting principles. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2017, based on the criteria established in Internal Control — Integrated Framework (2013) issued by COSO.

Basis of Opinion

The Company's management is responsible for these consolidated financial statements, 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 Report of Management on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the Company's consolidated financial statements and an opinion on the Company's internal control over financial reporting based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (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 audits to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud, and whether effective internal control over financial reporting was maintained in all material respects.

Our audits of the consolidated financial statements included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated 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 consolidated financial statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

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.

68

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

/s/ KPMG LLP

We have served as the Company's auditor since 2004.

Dallas, Texas

February 9, 2018

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CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS

	Year Ended December 31,
	2017		2016		2015
	(In $ millions, except share and per share data)
Net sales	6,140		5,389		5,674
Cost of sales	(4,625	)	(3,984	)	(4,356	)
Gross profit	1,515		1,405		1,318
Selling, general and administrative expenses	(456	)	(416	)	(506	)
Amortization of intangible assets	(20	)	(9	)	(11	)
Research and development expenses	(72	)	(78	)	(119	)
Other (charges) gains, net	(60	)	(11	)	(351	)
Foreign exchange gain (loss), net	(1	)	(1	)	4
Gain (loss) on disposition of businesses and assets, net	(5	)	3		(9	)
Operating profit (loss)	901		893		326
Equity in net earnings (loss) of affiliates	183		155		181
Interest expense	(122	)	(120	)	(119	)
Refinancing expense	—		(6	)	—
Interest income	2		2		1
Dividend income - cost investments	108		108		107
Other income (expense), net	3		(2	)	(8	)
Earnings (loss) from continuing operations before tax	1,075		1,030		488
Income tax (provision) benefit	(213	)	(122	)	(201	)
Earnings (loss) from continuing operations	862		908		287
Earnings (loss) from operation of discontinued operations	(16	)	(3	)	(3	)
Gain (loss) on disposition of discontinued operations	—		—		—
Income tax (provision) benefit from discontinued operations	3		1		1
Earnings (loss) from discontinued operations	(13	)	(2	)	(2	)
Net earnings (loss)	849		906		285
Net (earnings) loss attributable to noncontrolling interests	(6	)	(6	)	19
Net earnings (loss) attributable to Celanese Corporation	843		900		304
Amounts attributable to Celanese Corporation
Earnings (loss) from continuing operations	856		902		306
Earnings (loss) from discontinued operations	(13	)	(2	)	(2	)
Net earnings (loss)	843		900		304
Earnings (loss) per common share - basic
Continuing operations	6.21		6.22		2.03
Discontinued operations	(0.10	)	(0.01	)	(0.01	)
Net earnings (loss) - basic	6.11		6.21		2.02
Earnings (loss) per common share - diluted
Continuing operations	6.19		6.19		2.01
Discontinued operations	(0.10	)	(0.01	)	(0.01	)
Net earnings (loss) - diluted	6.09		6.18		2.00
Weighted average shares - basic	137,902,667		144,939,433		150,838,050
Weighted average shares - diluted	138,317,395		145,668,181		152,287,955

See the accompanying notes to the consolidated financial statements.

70

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

	Year Ended December 31,
	2017		2016		2015
	(In $ millions)
Net earnings (loss)	849		906		285
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	(1	)	—		—
Foreign currency translation	174		(11	)	(188	)
Gain (loss) on cash flow hedges	(1	)	5		2
Pension and postretirement benefits	9		(4	)	3
Total other comprehensive income (loss), net of tax	181		(10	)	(183	)
Total comprehensive income (loss), net of tax	1,030		896		102
Comprehensive (income) loss attributable to noncontrolling interests	(6	)	(6	)	19
Comprehensive income (loss) attributable to Celanese Corporation	1,024		890		121

See the accompanying notes to the consolidated financial statements.

71

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

	As of December 31,
	2017		2016
	(In $ millions, except share data)
ASSETS
Current Assets
Cash and cash equivalents (variable interest entity restricted - 2017: $19; 2016: $18)	576		638
Trade receivables - third party and affiliates (net of allowance for doubtful accounts - 2017: $9; 2016: $6; variable interest entity restricted - 2017: $5; 2016: $4)	986		801
Non-trade receivables, net	244		223
Inventories	900		720
Marketable securities, at fair value	32		30
Other assets	54		60
Total current assets	2,792		2,472
Investments in affiliates	976		852
Property, plant and equipment (net of accumulated depreciation - 2017: $2,584; 2016: $2,239; variable interest entity restricted - 2017: $697; 2016: $734)	3,762		3,577
Deferred income taxes	366		159
Other assets (variable interest entity restricted - 2017: $6; 2016: $9)	338		307
Goodwill	1,003		796
Intangible assets, net (variable interest entity restricted - 2017: $25; 2016: $26)	301		194
Total assets	9,538		8,357
LIABILITIES AND EQUITY
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	326		118
Trade payables - third party and affiliates	807		625
Other liabilities	354		322
Income taxes payable	72		12
Total current liabilities	1,559		1,077
Long-term debt, net of unamortized deferred financing costs	3,315		2,890
Deferred income taxes	211		130
Uncertain tax positions	156		131
Benefit obligations	585		893
Other liabilities	413		215
Commitments and Contingencies
Stockholders' Equity
Preferred stock, $0.01 par value, 100,000,000 shares authorized (2017 and 2016: 0 issued and outstanding)	—		—
Series A common stock, $0.0001 par value, 400,000,000 shares authorized (2017: 168,156,969 issued and 135,769,256 outstanding; 2016: 167,611,357 issued and 140,660,447 outstanding)	—		—
Series B common stock, $0.0001 par value, 100,000,000 shares authorized (2017 and 2016: 0 issued and outstanding)	—		—
Treasury stock, at cost (2017: 32,387,713 shares; 2016: 26,950,910 shares)	(2,031	)	(1,531	)
Additional paid-in capital	175		157
Retained earnings	4,920		4,320
Accumulated other comprehensive income (loss), net	(177	)	(358	)
Total Celanese Corporation stockholders' equity	2,887		2,588
Noncontrolling interests	412		433
Total equity	3,299		3,021
Total liabilities and equity	9,538		8,357

See the accompanying notes to the consolidated financial statements.

72

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF EQUITY

	Year Ended December 31,
	2017				2016				2015
	Shares		Amount		Shares		Amount		Shares		Amount
	(In $ millions, except share data)
Series A Common Stock
Balance as of the beginning of the period	140,660,447		—		146,782,297		—		152,902,710		—
Stock option exercises	20,151		—		194,872		—		94,147		—
Purchases of treasury stock	(5,436,803	)	—		(7,034,420	)	—		(6,649,865	)	—
Stock awards	525,461		—		717,698		—		435,305		—
Balance as of the end of the period	135,769,256		—		140,660,447		—		146,782,297		—
Treasury Stock
Balance as of the beginning of the period	26,950,910		(1,531	)	19,916,490		(1,031	)	13,266,625		(611	)
Purchases of treasury stock, including related fees	5,436,803		(500	)	7,034,420		(500	)	6,649,865		(420	)
Balance as of the end of the period	32,387,713		(2,031	)	26,950,910		(1,531	)	19,916,490		(1,031	)
Additional Paid-In Capital
Balance as of the beginning of the period			157				136				103
Stock-based compensation, net of tax			23				8				28
Stock option exercises, net of tax			1				13				5
Affiliate purchase of shares from noncontrolling interests			(6	)			—				—
Balance as of the end of the period			175				157				136
Retained Earnings
Balance as of the beginning of the period			4,320				3,621				3,491
Cumulative effect adjustment from adoption of new accounting standard (Note 2)			(1	)			—				—
Net earnings (loss) attributable to Celanese Corporation			843				900				304
Series A common stock dividends			(241	)			(201	)			(174	)
Restricted stock unit dividends			(1	)			—				—
Balance as of the end of the period			4,920				4,320				3,621
Accumulated Other Comprehensive Income (Loss), Net
Balance as of the beginning of the period			(358	)			(348	)			(165	)
Other comprehensive income (loss), net of tax			181				(10	)			(183	)
Balance as of the end of the period			(177	)			(358	)			(348	)
Total Celanese Corporation stockholders' equity			2,887				2,588				2,378
Noncontrolling Interests
Balance as of the beginning of the period			433				451				260
Net earnings (loss) attributable to noncontrolling interests			6				6				(19	)
(Distributions to) contributions from noncontrolling interests			(27	)			(24	)			210
Balance as of the end of the period			412				433				451
Total equity			3,299				3,021				2,829

See the accompanying notes to the consolidated financial statements.

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CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

	Year Ended December 31,
	2017		2016		2015
	(In $ millions)
Operating Activities
Net earnings (loss)	849		906		285
Adjustments to reconcile net earnings (loss) to net cash provided by (used in) operating activities
Asset impairments	—		2		126
Depreciation, amortization and accretion	310		295		363
Pension and postretirement net periodic benefit cost	(80	)	(54	)	(52	)
Pension and postretirement contributions	(363	)	(350	)	(63	)
Actuarial (gain) loss on pension and postretirement plans	46		103		127
Pension curtailments and settlements, net	—		—		(3	)
Deferred income taxes, net	(152	)	83		42
(Gain) loss on disposition of businesses and assets, net	5		2		8
Stock-based compensation	47		31		40
Undistributed earnings in unconsolidated affiliates	(52	)	(24	)	(5	)
Other, net	12		15		7
Operating cash provided by (used in) discontinued operations	8		2		(2	)
Changes in operating assets and liabilities
Trade receivables - third party and affiliates, net	(110	)	(59	)	61
Inventories	(97	)	8		62
Other assets	(7	)	39		(17	)
Trade payables - third party and affiliates	126		7		(111	)
Other liabilities	261		(113	)	(6	)
Net cash provided by (used in) operating activities	803		893		862
Investing Activities
Capital expenditures on property, plant and equipment	(267	)	(246	)	(232	)
Acquisitions, net of cash acquired	(269	)	(178	)	(6	)
Proceeds from sale of businesses and assets, net	1		12		4
Capital expenditures related to Fairway Methanol LLC	—		—		(288	)
Other, net	(14	)	(27	)	(36	)
Net cash provided by (used in) investing activities	(549	)	(439	)	(558	)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	111		(352	)	350
Proceeds from short-term borrowings	182		53		80
Repayments of short-term borrowings	(124	)	(90	)	(83	)
Proceeds from long-term debt	351		1,509		—
Repayments of long-term debt	(77	)	(1,127	)	(24	)
Purchases of treasury stock, including related fees	(500	)	(500	)	(420	)
Stock option exercises	1		6		3
Series A common stock dividends	(241	)	(201	)	(174	)
(Distributions to) contributions from noncontrolling interests	(27	)	(24	)	214
Other, net	(27	)	(33	)	(12	)
Net cash provided by (used in) financing activities	(351	)	(759	)	(66	)
Exchange rate effects on cash and cash equivalents	35		(24	)	(51	)
Net increase (decrease) in cash and cash equivalents	(62	)	(329	)	187
Cash and cash equivalents as of beginning of period	638		967		780
Cash and cash equivalents as of end of period	576		638		967

See the accompanying notes to the consolidated financial statements.

74

CELANESE CORPORATION AND SUBSIDIARIES

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

1. Description of the Company and Basis of Presentation

Description of the Company

Celanese Corporation and its subsidiaries (collectively, the "Company") is a global technology and specialty materials company. The Company's business involves processing chemical raw materials, such as methanol, carbon monoxide and ethylene, and natural products, including wood pulp, into value-added chemicals, thermoplastic polymers and other chemical-based products.

Definitions

In this Annual Report on Form 10-K ("Annual Report"), the term "Celanese" refers to Celanese Corporation, a Delaware corporation, and not its subsidiaries. The term "Celanese US" refers to the Company's subsidiary, Celanese US Holdings LLC, a Delaware limited liability company, and not its subsidiaries.

Basis of Presentation

The consolidated financial statements contained in this Annual Report were prepared in accordance with accounting principles generally accepted in the United States of America ("US GAAP") for all periods presented and include the accounts of the Company, its majority owned subsidiaries over which the Company exercises control and, when applicable, variable interest entities in which the Company is the primary beneficiary. The consolidated financial statements and other financial information included in this Annual Report, unless otherwise specified, have been presented to separately show the effects of discontinued operations.

In the ordinary course of business, the Company enters into contracts and agreements relative to a number of topics, including acquisitions, dispositions, joint ventures, supply agreements, product sales and other arrangements. The Company endeavors to describe those contracts or agreements that are material to its business, results of operations or financial position. The Company may also describe some arrangements that are not material but in which the Company believes investors may have an interest or which may have been included in a Form 8-K filing. Investors should not assume the Company has described all contracts and agreements relative to the Company's business in this Annual Report.

For those consolidated ventures in which the Company owns or is exposed to less than 100% of the economics, the outside stockholders' interests are shown as noncontrolling interests.

The Company has reclassified certain prior period amounts to conform to the current period's presentation.

2. Summary of Accounting Policies

Critical Accounting Policies

Recoverability of Goodwill and Indefinite-Lived Assets

The Company assesses the recoverability of the carrying amount of its reporting unit goodwill and indefinite-lived intangible assets either qualitatively or quantitatively annually during the third quarter of its fiscal year using June 30 balances or whenever events or changes in circumstances indicate that the carrying amount of the asset may not be fully recoverable. The Company assesses the recoverability of finite-lived intangible assets in the same manner as for property, plant and equipment. Impairment losses are generally recorded in Other (charges) gains, net in the consolidated statements of operations.

Recoverability of the carrying amount of goodwill is measured at the reporting unit level. In performing a quantitative analysis, the Company measures the recoverability of goodwill for each reporting unit using a discounted cash flow model incorporating discount rates commensurate with the risks involved, which is classified as a Level 3 fair value measurement. The key assumptions used in the discounted cash flow valuation model include discount rates, growth rates, tax rates, cash flow projections and terminal value rates. Discount rates, growth rates and cash flow projections are the most sensitive and susceptible to change as they require significant management judgment. Discount rates used are similar to the rates estimated by the weighted average cost of capital ("WACC") considering any differences in company-specific risk factors. The Company may engage third-party valuation consultants to assist with this process.

75

Management tests indefinite-lived intangible assets for impairment quantitatively utilizing the relief from royalty method under the income approach to determine the estimated fair value for each indefinite-lived intangible asset, which is classified as a Level 3 fair value measurement. The relief from royalty method estimates the Company's theoretical royalty savings from ownership of the intangible asset. The key assumptions used in this model include discount rates, royalty rates, growth rates, tax rates, sales projections and terminal value rates. Discount rates, royalty rates, growth rates and sales projections are the assumptions most sensitive and susceptible to change as they require significant management judgment. Discount rates used are similar to the rates estimated by the WACC considering any differences in company-specific risk factors. Royalty rates are established by management and are periodically substantiated by third-party valuation consultants.

Environmental Liabilities

The Company manufactures and sells a diverse line of chemical products throughout the world. Accordingly, the Company's operations are subject to various hazards incidental to the production of industrial chemicals including the use, handling, processing, storage and transportation of hazardous materials. The Company recognizes losses and accrues liabilities relating to environmental matters if available information indicates that it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. Depending on the nature of the site, the Company accrues through 15 years, unless the Company has government orders or other agreements that extend beyond 15 years. The Company estimates environmental liabilities on a case-by-case basis using the most current status of available facts, existing technology, presently enacted laws and regulations and prior experience in remediation of contaminated sites. Recoveries of environmental costs from other parties are recorded as assets when their receipt is deemed probable.

An environmental reserve related to cleanup of a contaminated site might include, for example, a provision for one or more of the following types of costs: site investigation and testing costs, cleanup costs, costs related to soil and water contamination resulting from tank ruptures and post-remediation monitoring costs. These undiscounted reserves do not take into account any claims or recoveries from insurance. The measurement of environmental liabilities is based on the Company's periodic estimate of what it will cost to perform each of the elements of the remediation effort. The Company utilizes third parties to assist in the management and development of cost estimates for its sites. Changes to environmental regulations or other factors affecting environmental liabilities are reflected in the consolidated financial statements in the period in which they occur.

Pension and Other Postretirement Obligations

The Company recognizes a balance sheet asset or liability for each of its pension and other postretirement benefit plans equal to the plan's funded status as of a December 31 measurement date. The amounts recognized in the consolidated financial statements related to pension and other postretirement benefits are determined on an actuarial basis. Various assumptions are used in the calculation of the actuarial valuation of the employee benefit plans. These assumptions include the discount rate, compensation levels, expected long-term rates of return on plan assets and trends in health care costs. In addition, actuarial consultants use factors such as withdrawal and mortality rates to estimate the projected benefit obligation.

The Company applies the long-term expected rate of return to the fair value of plan assets and immediately recognizes in operating results the change in fair value of plan assets and net actuarial gains and losses annually in the fourth quarter of each fiscal year and whenever a plan is required to be remeasured. Events requiring a plan remeasurement will be recognized in the quarter in which such remeasurement event occurs. The remaining components of pension and other postretirement plan net periodic benefit costs are recorded on a quarterly basis.

The Company allocates the service cost and amortization of prior service cost (or credit) components of its pension and postretirement plans to its business segments. Interest cost, expected return on assets and net actuarial gains and losses are considered financing activities managed at the corporate level and are recorded to Other Activities. The Company believes the expense allocation appropriately matches the cost incurred for active employees to the respective business segment.

Other postretirement benefit plans provide medical and life insurance benefits to retirees who meet minimum age and service requirements. The key determinants of the accumulated postretirement benefit obligation ("APBO") are the discount rate and the health care cost trend rate.

• Discount Rate

As of the measurement date, the Company determines the appropriate discount rate used to calculate the present value of future cash flows currently expected to be required to settle the pension and other postretirement benefit obligations. The discount rate is generally based on the yield on high-quality corporate fixed-income securities.

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In the US, the rate used to discount pension and other postretirement benefit plan liabilities is based on a yield curve developed from market data of over 300 Aa-grade non-callable bonds at the measurement date. This yield curve has discount rates that vary based on the duration of the obligations. The estimated future cash flows for the pension and other benefit obligations were matched to the corresponding rates on the yield curve to derive a weighted average discount rate.

The Company determines its discount rates in the Euro zone using the iBoxx Euro Corporate AA Bond indices with appropriate adjustments for the duration of the plan obligations. In other international locations, the Company determines its discount rates based on the yields of high quality government bonds with a duration appropriate to the duration of the plan obligations.

• Change in estimate regarding pension and other postretirement benefits

Beginning in 2016, the Company elected to change the method used to estimate the service and interest cost components of net periodic benefit cost for its significant defined benefit pension plans and other postretirement benefit plans. Previously, the Company estimated the service and interest cost components utilizing a single weighted average discount rate derived from the yield curve used to measure the benefit obligation at the beginning of the period. The Company elected to use a full yield curve approach in the estimation of these components of net periodic benefit cost by applying the specific spot rates along the yield curve used in the determination of the benefit obligation to the relevant projected cash flows. This change improves the correlation between projected benefit cash flows and the corresponding yield curve spot rates and provides a more precise measurement of service and interest costs. This change did not affect the measurement of the Company's total benefit obligations as the change in service and interest cost was completely offset in the annual actuarial (gain) loss reported. The Company accounted for this change prospectively as a change in estimate beginning in 2016.

• Expected Long-Term Rate of Return on Assets

The Company determines the long-term expected rate of return on plan assets by considering the current target asset allocation, as well as the historical and expected rates of return on various asset categories in which the plans are invested. A single long-term expected rate of return on plan assets is then calculated for each plan as the weighted average of the target asset allocation and the long-term expected rate of return assumptions for each asset category within each plan.

The expected rate of return is assessed annually and is based on long-term relationships among major asset classes and the level of incremental returns that can be earned by the successful implementation of different active investment management strategies. Equity returns are based on estimates of long-term inflation rate, real rate of return, 10-year Treasury bond premium over cash and historical equity risk premium. Fixed income returns are based on maturity, historical long-term inflation, real rate of return and credit spreads.

• Investment Policies and Strategies

The investment objectives for the Company's pension plans are to earn, over a moving twenty-year period, a long-term expected rate of return, net of investment fees and transaction costs, sufficient to satisfy the benefit obligations of the plan, while at the same time maintaining adequate liquidity to pay benefit obligations and proper expenses, and meet any other cash needs, in the short- to medium-term.

The equity and debt securities objectives are to provide diversified exposure across the US and global equity markets and to manage the risks and returns of the plans through the use of multiple managers and strategies. The fixed income strategy is designed to reduce liability-related interest rate risk by investing in bonds that match the duration and credit quality of the plan liabilities. Derivatives-based strategies may be used to mitigate investment risks.

The financial objectives of the qualified pension plans are established in conjunction with a comprehensive review of each plan's liability structure. The Company's asset allocation policy is based on detailed asset/liability analysis. In developing investment policy and financial goals, consideration is given to each plan's demographics, the returns and risks associated with current and alternative investment strategies and the current and projected cash, expense and funding ratios of each plan. Investment policies must also comply with local statutory requirements as determined by each country. A formal asset/liability study of each plan is undertaken every three to five years or whenever there has been a material change in plan demographics, benefit structure or funding status and investment market. The Company has adopted a long-term investment horizon such that the risk and duration of investment losses are weighed against the long-term potential for appreciation of assets. Although there cannot be complete assurance that these objectives will be realized, it is believed that the likelihood for their realization is reasonably high, based upon the asset allocation chosen and the historical and expected performance of the asset classes utilized by the plans. The intent is for investments to be broadly diversified across asset classes, investment styles, market sectors, investment managers, developed and emerging markets and securities in order to moderate portfolio volatility and risk.

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Investments may be in separate accounts, commingled trusts, mutual funds and other pooled asset portfolios provided they all conform to fiduciary standards.

External investment managers are hired to manage pension assets. Investment consultants assist with the screening process for each new manager hired. Over the long-term, the investment portfolio is expected to earn returns that exceed a composite of market indices that are weighted to match each plan's target asset allocation. The portfolio return should also (over the long-term) meet or exceed the return used for actuarial calculations in order to meet the future needs of each plan.

Commitments and Contingencies

Due to the inherent subjectivity of assessments and unpredictability of outcomes of legal proceedings, the Company's litigation accruals and estimates of possible loss or range of possible loss ("Possible Loss") may not represent the ultimate loss to the Company from legal proceedings. For reasonably possible loss contingencies that may be material, the Company estimates its Possible Loss when determinable, considering that the Company could incur no loss in certain matters.

For some matters, the Company is unable, at this time, to estimate its Possible Loss that is reasonably possible of occurring. Generally, the less progress that has been made in the proceedings or the broader the range of potential results, the more difficult it is for the Company to estimate the Possible Loss that is reasonably possible the Company could incur. The Company may disclose certain information related to a plaintiff's claim against the Company alleged in the plaintiff's pleadings or otherwise publicly available. While information of this type may provide insight into the potential magnitude of a matter, it does not necessarily represent the Company's estimate of reasonably possible or probable loss. Some of the Company's exposure in legal matters may be offset by applicable insurance coverage. The Company does not consider the possible availability of insurance coverage in determining the amounts of any accruals or any estimates of Possible Loss. Thus, the Company's exposure and ultimate losses may be higher or lower, and possibly materially so, than the Company's litigation accruals and estimates of Possible Loss.

Income Taxes

The provision for income taxes is determined using the asset and liability approach of accounting for income taxes. Under this approach, deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes and net operating loss and tax credit carryforwards. The amount of deferred taxes on these temporary differences is determined using the tax rates that are expected to apply to the period when the asset is realized or the liability is settled, as applicable, based on tax rates and laws in the respective tax jurisdiction enacted as of the balance sheet date.

The Company reviews its deferred tax assets for recoverability and establishes a valuation allowance based on historical taxable income, projected future taxable income, applicable tax strategies and the expected timing of the reversals of existing temporary differences. A valuation allowance is provided when it is more likely than not (likelihood of greater than 50%) that some portion or all of the deferred tax assets will not be realized.

The Company considers many factors when evaluating and estimating its tax positions and tax benefits, which may require periodic adjustments and which may not accurately anticipate actual outcomes. Tax positions are recognized only when it is more likely than not (likelihood of greater than 50%), based on technical merits, that the positions will be sustained upon examination. Tax positions that meet the more-likely-than-not threshold are measured using a probability weighted approach as the largest amount of tax benefit that is greater than 50% likely of being realized upon settlement. Whether the more-likely-than-not recognition threshold is met for a tax position is a matter of judgment based on the individual facts and circumstances of that position evaluated in light of all available evidence.

The Company recognizes interest and penalties related to uncertain tax positions in Income tax (provision) benefit in the consolidated statements of operations.

Other Accounting Policies

Consolidation Principles

The consolidated financial statements have been prepared in accordance with US GAAP for all periods presented and include the accounts of the Company and its majority owned subsidiaries over which the Company exercises control. All intercompany accounts and transactions have been eliminated in consolidation.

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Estimates and Assumptions

The preparation of consolidated financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of net sales, expenses and allocated charges during the reporting period. Significant estimates pertain to impairments of goodwill, intangible assets and other long-lived assets, purchase price allocations, restructuring costs and other (charges) gains, net, income taxes, pension and other postretirement benefits, asset retirement obligations, environmental liabilities and loss contingencies, among others. Actual results could differ from those estimates.

Purchase Accounting

The Company recognizes the identifiable tangible and intangible assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date. The excess of purchase price over the aggregate fair values is recorded as goodwill. Intangible assets are valued using the relief from royalty, multi-period excess earnings and discounted cash flow methodologies, which are considered Level 3 measurements. The relief from royalty method estimates the Company's theoretical royalty savings from ownership of the intangible asset. Key assumptions used in this method include discount rates, royalty rates, growth rates, sales projections and terminal value rates. Key assumptions used in the multi-period excess earnings method include discount rates, retention rates, growth rates, sales projections, expense projections and contributory asset charges. Key assumptions used in the discounted cash flow valuation model include discount rates, growth rates, tax rates, cash flow projections and terminal value rates. All of these methodologies require significant management judgment and, therefore, are susceptible to change. The Company calculates the fair value of the identifiable tangible and intangible assets acquired and liabilities assumed to allocate the purchase price at the acquisition date. The Company may use the assistance of third-party valuation consultants.

Fair Value Measurements

The Company determines fair value based on the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities required to be recorded at fair value, the Company considers assumptions that market participants would use when pricing the asset or liability. Market participant assumptions are categorized by a three-tiered fair value hierarchy which prioritizes the inputs used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurement) and the lowest priority to unobservable inputs (Level 3 measurement). This hierarchy requires entities to maximize the use of observable inputs and minimize the use of unobservable inputs. If a financial instrument uses inputs that fall in different levels of the hierarchy, the instrument will be categorized based upon the lowest level of input that is significant to the fair value calculation. Valuations for fund investments, such as common/collective trusts, registered investment companies and short-term investment funds, which do not have readily determinable fair values, are typically estimated using a net asset value provided by a third party as a practical expedient.

The levels of inputs used to measure fair value are as follows:

Level 1 - unadjusted quoted prices for identical assets or liabilities in active markets accessible by the Company

Level 2 - inputs that are observable in the marketplace other than those inputs classified as Level 1

Level 3 - inputs that are unobservable in the marketplace and significant to the valuation

Cash and Cash Equivalents

All highly liquid investments with original maturities of three months or less are considered cash equivalents.

Allowance for Doubtful Accounts

The Company maintains allowances for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments. The Company believes, based on historical results, the likelihood of actual write-offs having a material impact on financial results is low. The allowance for doubtful accounts is estimated using factors such as customer credit ratings, past collection history and general risk profile. Receivables are charged against the allowance for doubtful accounts when it is probable that the receivable will not be recovered.

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Inventories

Inventories, including stores and supplies, are stated at the lower of cost and net realizable value. Cost for inventories is determined using the first-in, first-out ("FIFO") method. Cost includes raw materials, direct labor and manufacturing overhead. Cost for stores and supplies is primarily determined by the average cost method.

Investments

• Marketable Securities

The cost of available-for-sale securities sold is determined using the specific identification method.

• Investments in Affiliates

Investments where the Company can exercise significant influence over operating and financial policies of an investee, which is generally considered when an investor owns 20% or more of the voting stock of an investee, are accounted for under the equity method of accounting. Investments where the Company does not exercise significant influence are accounted for under the cost method of accounting. The Company determined it cannot exercise significant influence over certain investments where the Company owns greater than a 20% interest due to local government investment in and influence over these entities, limitations on the Company's involvement in the day-to-day operations and the present inability of the entities to provide timely financial information prepared in accordance with US GAAP. Accordingly, these investments are accounted for under the cost method of accounting.

In certain instances, the financial information of the Company's equity investees is not available on a timely basis. Accordingly, the Company records its proportional share of the investee's earnings or losses on a consistent lag of no more than one quarter.

When required to assess the recoverability of its investments in affiliates, the Company estimates fair value using a discounted cash flow model. The Company may engage third-party valuation consultants to assist with this process.

Property, Plant and Equipment, Net

Land is recorded at historical cost. Buildings, machinery and equipment, including capitalized interest, and property under capital lease agreements, are recorded at cost less accumulated depreciation. The Company records depreciation and amortization in its consolidated statements of operations as either Cost of sales, Selling, general and administrative expenses or Research and development expenses consistent with the utilization of the underlying assets. Depreciation is calculated on a straight-line basis over the following estimated useful lives of depreciable assets:

Land improvements	20 years
Buildings and improvements	30 years
Machinery and equipment	20 years

Leasehold improvements are amortized over 10 years or the remaining life of the respective lease, whichever is shorter.

Accelerated depreciation is recorded when the estimated useful life is shortened. Ordinary repair and maintenance costs, including costs for planned maintenance turnarounds, that do not extend the useful life of the asset are charged to earnings as incurred. Fully depreciated assets are retained in property and depreciation accounts until sold or otherwise disposed. In the case of disposals, assets and related depreciation are removed from the accounts, and the net amounts, less proceeds from disposal, are included in earnings.

The Company assesses the recoverability of the carrying amount of its property, plant and equipment whenever events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be recoverable. An impairment loss would be assessed when estimated undiscounted future cash flows from the operation and disposition of the asset group are less than the carrying amount of the asset group. Asset groups have identifiable cash flows and are largely independent of other asset groups. Measurement of an impairment loss is based on the excess of the carrying amount of the asset group over its fair value. The Company calculates the fair value using a discounted cash flow model incorporating discount rates commensurate with the risks involved for the asset group, which is classified as a Level 3 fair value measurement. The key assumptions used in the discounted cash flow valuation model include discount rates, growth rates, tax rates, cash flow projections and terminal value rates. Discount rates, growth rates and cash flow projections involve significant judgment and are based on management's

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estimate of current and forecasted market conditions and cost structure. Impairment losses are generally recorded in Other (charges) gains, net in the consolidated statements of operations.

Definite-lived Intangible Assets

Customer-related intangible assets and other intangible assets with finite lives are amortized on a straight-line basis over their estimated useful lives, which range from three to 30 years.

Derivative and Hedging Instruments

The Company manages its exposures to interest rates, foreign exchange rates and commodity prices through a risk management program that includes the use of derivative financial instruments. The Company does not use derivative financial instruments for speculative trading purposes. The fair value of derivative instruments other than foreign currency forwards and swaps is recorded as an asset or liability on a net basis at the balance sheet date.

• Foreign Exchange Risk Management

Certain subsidiaries of the Company have assets and liabilities denominated in currencies other than their respective functional currencies, which creates foreign exchange risk. The Company also is exposed to foreign currency fluctuations on transactions with third-party entities as well as intercompany transactions. The Company minimizes its exposure to foreign currency fluctuations by entering into foreign currency forwards and swaps. These foreign currency forwards and swaps are not designated as hedges. Gains and losses on foreign currency forwards and swaps entered into to offset foreign exchange impacts on intercompany balances are included in Other income (expense), net in the consolidated statements of operations. Gains and losses on foreign currency forwards and swaps entered into to offset foreign exchange impacts on all other assets and liabilities are included in Foreign exchange gain (loss), net in the consolidated statements of operations.

The Company uses non-derivative financial instruments that may give rise to foreign currency transaction gains or losses to hedge the foreign currency exposure of net investments in foreign operations. Accordingly, the effective portion of gains and losses from remeasurement of the non-derivative financial instrument is included in foreign currency translation within Accumulated other comprehensive income (loss), net in the consolidated balance sheets. Gains and losses are reclassified to earnings in the period the hedged investment is sold or liquidated.

• Commodity Risk Management

The Company has exposure to the prices of commodities in its procurement of certain raw materials. The Company manages its exposure to commodity risk primarily through the use of long-term supply agreements, multi-year purchasing and sales agreements and forward purchase contracts. The Company regularly assesses its practice of using forward purchase contracts and other raw material hedging instruments in accordance with changes in economic conditions. Forward purchases and swap contracts for raw materials are principally settled through physical delivery of the commodity. For qualifying contracts, the Company has elected to apply the normal purchases and normal sales exception based on the probability at the inception and throughout the term of the contract that the Company would not net settle and the transaction would result in the physical delivery of the commodity. Accordingly, realized gains and losses on these contracts are included in the cost of the commodity upon the settlement of the contract.

The Company also uses commodity swaps to hedge the risk of fluctuating price changes in certain raw materials and in which physical settlement does not occur. These commodity swaps fix the variable fee component of the price of certain commodities. All or a portion of these commodity swap agreements may be designated as cash flow hedges. Accordingly, to the extent the cash flow hedge was effective, changes in the fair value of commodity swaps are included in gain (loss) from cash flow hedges within Accumulated other comprehensive income (loss), net in the consolidated balance sheets. Gains and losses are reclassified to earnings in the period that the hedged item affected earnings.

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Insurance Loss Reserves

The Company has two wholly-owned insurance companies (the "Captives") that are used as a form of self-insurance for liability and workers compensation risks. Capitalization of the Captives is determined by regulatory guidelines. Premiums written are recognized as revenue based on policy periods. One of the Captives also insures certain third-party risks. The Captives use reinsurance arrangements to reduce their risks, however these arrangements do not relieve the Captives from their obligations to policyholders. The financial condition of the Captives' reinsurers are monitored to minimize exposure to insolvencies. However, failure of the reinsurers to honor their obligations could result in losses to the Captives.

Claim reserves are established when sufficient information is available to indicate a specific policy is involved and the Company can reasonably estimate its liability. These reserves are based on management estimates and periodic actuarial valuations. In addition, reserves have been established to cover exposures for both known and unreported claims. Estimates of these liabilities are reviewed and updated regularly, however it is possible that actual results could differ significantly from the recorded liabilities.

Asset Retirement Obligations

Periodically, the Company will conclude a site no longer has an indeterminate life based on long-lived asset impairment triggering events and decisions made by the Company. Accordingly, the Company will record asset retirement obligations associated with such sites. To measure the fair value of the asset retirement obligations, the Company will use the expected present value technique, which is classified as a Level 3 fair value measurement. The expected present value technique uses a set of cash flows that represent the probability-weighted average of all possible cash flows based on the Company's judgment. The Company uses the following inputs to determine the fair value of the asset retirement obligations based on the Company's experience with fulfilling obligations of this type and the Company's knowledge of market conditions: (a) labor costs; (b) allocation of overhead costs; (c) profit on labor and overhead costs; (d) effect of inflation on estimated costs and profits; (e) risk premium for bearing the uncertainty inherent in cash flows, other than inflation; (f) time value of money represented by the risk-free interest rate commensurate with the timing of the associated cash flows; and (g) nonperformance risk relating to the liability, which includes the Company's own credit risk. The asset retirement obligations are accreted to their undiscounted values until the time at which they are expected to be settled.

The Company has identified but not recognized asset retirement obligations related to certain of its existing operating facilities. Examples of these types of obligations include demolition, decommissioning, disposal and restoration activities. Legal obligations exist in connection with the retirement of these assets upon closure of the facilities or abandonment of the existing operations. However, the Company currently plans on continuing operations at these facilities indefinitely and therefore, a reasonable estimate of fair value cannot be determined at this time. In the event the Company considers plans to abandon or cease operations at these sites, an asset retirement obligation will be reassessed at that time. If certain operating facilities were to close, the related asset retirement obligations could significantly affect the Company's results of operations and cash flows.

Deferred Financing Costs

Deferred financing costs are amortized using a method that approximates the effective interest rate method over the term of the related debt into Interest expense in the consolidated statements of operations. Upon the extinguishment of the related debt, any unamortized deferred financing costs are immediately expensed and included in Refinancing expense in the consolidated statements of operations. Upon the modification of the related debt, a portion of unamortized deferred financing costs may be immediately expensed and included in Refinancing expense in the consolidated statements of operations. Direct costs of refinancing activities are immediately expensed and included in Refinancing expense in the consolidated statements of operations.

Revenue Recognition

The Company recognizes revenue when title and risk of loss have been transferred to the customer, generally at the time of shipment of products, and provided that four basic criteria are met: (a) persuasive evidence of an arrangement exists; (b) delivery has occurred or services have been rendered; (c) the fee is fixed or determinable; and (d) collectibility is reasonably assured. Shipping and handling fees billed to customers in a sales transaction are recorded in Net sales and shipping and handling costs incurred are recorded in Cost of sales.

Research and Development

The costs of research and development are charged as an expense in the period in which they are incurred.

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Management Compensation Plans

Share-based compensation expense is measured at the grant date, based on the fair value of the award, and is recognized over the participant's requisite service period. Upon termination of a participant's employment with the Company by reason of death or disability, retirement or by the Company without cause (as defined in the respective award agreements), a prorated award will generally vest on the original vesting date. The prorated award is calculated based on the time lapsed between the grant date and the date of termination, reduced by awards previously vested. Upon the termination of a Participant's employment with the Company for any other reason, any unvested portion of the award shall be forfeited and canceled without consideration.

• Restricted Stock Units ("RSUs")

Performance-based RSUs. The Company generally grants performance-based RSUs to the Company's executive officers and certain employees annually in February. The Company may also grant performance-based RSUs to certain new employees or to employees who assume positions of increasing responsibility at the time those events occur. The fair value of the Company's performance-based RSUs with a performance condition is equal to the average of the high and low price of the Company's Series A common stock, par value $0.0001 per share ("Common Stock"), on the grant date less the present value of the expected dividends not received during the vesting period. Outstanding performance-based RSUs granted prior to 2016 generally vest in two equal tranches with the final tranche vesting three years from the grant date. Outstanding performance-based RSUs granted in 2016 and thereafter generally cliff-vest three years from the date of grant. Compensation expense for performance-based RSUs granted prior to 2016 is recognized over the vesting period of the respective grant based on the accelerated attribution method, and compensation expense for performance-based RSUs granted in 2016 and thereafter is recognized over the vesting period of the respective grant on a straight-line basis. Historically, the Company recognized share-based compensation net of estimated forfeitures over the vesting period of the respective grant. Effective January 1, 2017, the Company elected to change its accounting policy to recognize forfeitures as they occur. The new forfeiture policy election was adopted using a modified retrospective approach with a cumulative effect adjustment of $1 million to Retained earnings as of January 1, 2017. See Note 3 for further information.

The number of performance-based RSUs that ultimately vest is dependent on one or both of the following according to the terms of the specific award agreement: the achievement of (a) internal profitability targets (performance condition) and (b) market performance targets measured by the comparison of the Company's stock performance versus a defined peer group (market condition). Based on the achievement of internal profitability targets, the ultimate number of shares of the Company's Common Stock issued will range from zero to stretch, with stretch defined individually under each award, net of shares used to cover minimum statutory personal income taxes withheld. Performance-based RSUs are canceled to the extent actual results do not meet minimum internal profitability measures, as defined individually under each award.

Time-based RSUs. The Company grants non-employee Directors time-based RSUs annually that generally vest one year from the grant date. The Company also grants time-based RSUs to the Company's executives and certain employees that generally vest ratably over three years. The fair value of the time-based RSUs is equal to the average of the high and low price of the Company's Common Stock on the grant date less the present value of the expected dividends not received during the vesting period. Compensation expense for time-based RSUs less estimated forfeitures is recognized over the vesting period of the respective grant on a straight-line basis.

The Company's RSUs are net settled by withholding shares of the Company's Common Stock to cover minimum statutory income taxes and remitting the remaining shares of the Company's Common Stock to an individual brokerage account. Authorized shares of the Company's Common Stock are used to settle RSUs.

Under the 2009 Global Incentive Plan ("2009 GIP"), the Company may not grant RSUs with the right to participate in dividends or dividend equivalents.

Functional and Reporting Currencies

For the Company's international operations where the functional currency is other than the US dollar, assets and liabilities are translated using period-end exchange rates, while the statement of operations amounts are translated using the average exchange rates for the respective period. Differences arising from the translation of assets and liabilities in comparison with the translation of the previous periods or from initial recognition during the period are included as a separate component of Accumulated other comprehensive income (loss), net.

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3. Recent Accounting Pronouncements

The following table provides a brief description of recent Accounting Standard Updates ("ASU") issued by the Financial Accounting Standards Board ("FASB"):

Standard	Description	Effective Date	Effect on the Financial Statements or Other Significant Matters
In August 2017, the FASB issued ASU 2017-12, Targeted Improvements to Accounting for Hedging Activities.	The new guidance improves the financial reporting of hedging relationships to better portray the economic results of an entity's risk management activities in its financial statements through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results.	January 1, 2019. Early adoption is permitted.	The Company plans to early adopt the new guidance during the three months ended March 31, 2018, but does not expect adoption will have a material impact on the Company's financial statements and related disclosures.
In March 2017, the FASB issued ASU 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost.	The new guidance clarifies the presentation and classification of the components of net periodic benefit costs in the consolidated statement of operations.	January 1, 2018. Early adoption is permitted.	The adoption of the new guidance will result in the reclassification of ($44) million, $41 million and $59 million of non-operating pension cost (credit) into non-operating pension cost (credit) below Operating profit, primarily impacting the Other Activities segment, for the years ended December 31, 2017, 2016 and 2015, respectively. The reclassification will not impact Earnings from continuing operations before taxes. Further, the adoption will not have a material impact on the Company's financial statement disclosures.
In January 2017, the FASB issued ASU 2017-04, Intangibles: Goodwill and Other: Simplifying the Test for Goodwill Impairment.	The new guidance simplifies subsequent measurement of goodwill by eliminating Step 2 from the goodwill impairment test.	January 1, 2020. Early adoption is permitted.	The Company adopted the new guidance during the three months ended September 30, 2017, as part of the FASB's simplification initiative. The adoption of the new guidance did not have a material impact to the Company.
In October 2016, the FASB issued ASU 2016-16, Intra-Entity Transfers of Assets Other Than Inventory.	The new guidance requires the income tax consequences of an intra-entity transfer of assets other than inventory to be recognized when the transfer occurs rather than deferring until an outside sale has occurred.	January 1, 2018. Early adoption is permitted.	The adoption of the new guidance will not have a material impact on the Company's financial statements and related disclosures.
In August 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments.	The new guidance clarifies the presentation and classification of certain cash receipts and cash payments in the statement of cash flows.	January 1, 2018. Early adoption is permitted.	The adoption of the new guidance will not have a material impact on the Company's financial statements and related disclosures.
In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting.	The new guidance simplifies several aspects of the accounting for share-based payment transactions, including the timing of recognizing income tax consequences, classification of awards as either equity or liabilities, calculation of compensation expense and classification on the statement of cash flows.	January 1, 2017. Early adoption is permitted.	The Company adopted the new guidance effective January 1, 2017, as part of the FASB's simplification initiative. The adoption of the new guidance did not have a material impact to the Company. The Company changed its accounting policy regarding the recognition of stock-based compensation expense as part of the adoption (Note 2).

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Standard	Description	Effective Date	Effect on the Financial Statements or Other Significant Matters
In February 2016, the FASB issued ASU 2016-02, Leases.	The new guidance supersedes the lease guidance under FASB Accounting Standards Codification ("ASC") Topic 840, Leases, resulting in the creation of FASB ASC Topic 842, Leases. The guidance requires a lessee to recognize in the statement of financial position a liability to make lease payments and a right-of-use asset representing its right to use the underlying asset for the lease term for both finance and operating leases.	January 1, 2019. Early adoption is permitted.	The Company is currently evaluating its population of leases, and is continuing to assess all potential impacts of the standard, but currently believes the most significant impact relates to its accounting for manufacturing and logistics equipment, and real estate operating leases. The Company anticipates recognition of additional assets and corresponding liabilities related to leases upon adoption, but cannot quantify these at this time. The Company plans to adopt the standard effective January 1, 2019.
In January 2016, the FASB issued ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities.	The new guidance updates certain aspects of recognition, measurement, presentation and disclosure of financial instruments.	January 1, 2018. Early adoption is permitted.	The Company plans to adopt the guidance effective January 1, 2018, and will apply the modified retrospective approach with a cumulative-effect adjustment of less than $1 million to Retained earnings.
In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers.Since that date, the FASB has issued additional ASUs clarifying certain aspects of ASU 2014-09.	The new guidance requires entities to recognize revenue in a way that depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The new guidance provides alternative methods of adoption. Subsequent guidance issued after May 2014 did not change the core principle of ASU 2014-09.	January 1, 2018. Earlier adoption was permitted, but not before December 15, 2016.	The Company will adopt the revenue guidance effective January 1, 2018, using the modified retrospective approach. The Company has completed its assessment, and the impact from adoption is less than $1 million to the consolidated financial statements and related disclosures. Further, the Company does not expect a significant change to the manner or timing of recognizing revenue as a majority of its revenue transactions are recognized when product is delivered.

4. Acquisitions, Dispositions and Plant Closures

Acquisitions

• Acetate Tow Joint Venture

On June 18, 2017, Celanese, through various subsidiaries, entered into an agreement with affiliates of The Blackstone Group L.P. (the "Blackstone Entities") to form a joint venture which combines substantially all of the operations of the Company's cellulose derivatives business and the operations of the Rhodia Acetow cellulose acetate business formerly operated by Solvay S.A. and acquired by the Blackstone Entities on June 1, 2017. The Company's cellulose derivatives operations are included in the Consumer Specialties segment. The combined business will operate under a common governance structure through two separate joint ventures, each of which will be owned ultimately 70% and 30% by Celanese and the Blackstone Entities, respectively. One venture will primarily be comprised of the US operations being contributed and the other will be comprised of the remaining international operations being contributed. Closing of the transaction is subject to customary closing conditions, including: (i) waiting periods, clearances and/or approvals of the European Union and other jurisdictions requiring antitrust or similar approvals, and (ii) completion of the internal reorganization of the Company's cellulose derivatives business to facilitate the closing and operation of the joint venture post-closing. The agreement may be terminated by Celanese and/or the Blackstone Entities under certain limited circumstances, including if the closing is not consummated within one year of signing, which date may be extended by an additional 90 days, under certain circumstances. Pursuant to the terms of the agreement, once approved and upon closing, the Company is expecting to consolidate the joint venture results, subject to the Blackstone Entities' noncontrolling interest. The Company has received regulatory approval in four out of six jurisdictions requiring approval, and the European Commission ("EC") has moved into its Phase II investigation of the ongoing merger review process. Under the standard review process of a Phase II investigation, the Company received a statement of objections from the EC. This statement of objections sets out the provisional position of the EC and does not prejudge the final outcome of the case.

85

In connection with the agreement, the joint venture obtained commitments for credit facilities aggregating $2.4 billion to be entered into by the joint venture entities at the closing consisting of (i) senior secured ($135 million) and senior unsecured ($65 million) revolving credit facilities in an aggregate principal amount of $200 million, (ii) senior secured term loan facilities in an aggregate principal amount of $1.0 billion, (iii) a senior unsecured bridge facility in an aggregate principal amount of $800 million, which bridge facility will backstop the proposed issuance of $800 million senior unsecured notes by a joint venture subsidiary, and (iv) a senior unsecured term loan facility in an aggregate principal amount of $400 million. The credit facilities will be guaranteed by certain of the subsidiaries of the respective borrowers; however, only the $65 million senior unsecured revolving credit facility and the $400 million senior unsecured term loan credit facility will be guaranteed by Celanese. Approximately $2.2 billion of the proceeds of the debt financing are expected to be used, in part, to repay certain of the parties' existing indebtedness and a $1.6 billion dividend to the Company.

• Nilit Plastics

On May 3, 2017, using cash on hand and borrowings under the Company's senior unsecured revolving credit facility, the Company acquired the nylon compounding division of Nilit Group ("Nilit"), an independent producer of high performance nylon resins, fibers and compounds. Celanese acquired the nylon compounding product portfolio, customer agreements and manufacturing, technology and commercial facilities. The acquisition of Nilit increases the Company's global engineered materials product platforms, extends the operational model, technical and industry solutions capabilities and expands project pipelines. The acquisition was accounted for as a business combination and the acquired operations are included in the Advanced Engineered Materials segment.

Pro forma financial information since the respective acquisition date has not been provided as the acquisition did not have a material impact on the Company's financial information. The Company allocated the purchase price of the acquisition to identifiable assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date. The excess of the purchase price over the aggregate fair values was recorded as goodwill. The Company calculated the fair value of the assets acquired using the income, market, or cost approach (or a combination thereof). Fair values were determined based on Level 3 inputsincluding estimated future cash flows, discount rates, royalty rates, growth rates, sales projections, retention rates and terminal values, all of which require significant management judgment and are susceptible to change. The purchase price allocation is based upon preliminary information and is subject to change if additional information about the facts and circumstances that existed at the acquisition date becomes available. The final fair value of the net assets acquired may result in adjustments to the assets and liabilities, including goodwill. During the year endedDecember 31, 2017, the Company made certain adjustments to its purchase price allocation to adjust taxes and working capital, which resulted in a $2 million reduction to goodwill initially recorded. Any subsequent measurement period adjustments are not expected to have a material impact on the Company's results of operations.

86

The preliminary purchase price allocation for the Nilit acquisition is as follows:

	As of May 3, 2017
	(In $ millions)
Cash and cash equivalents	4
Trade receivables - third party and affiliates	21
Inventories	37
Property, plant and equipment, net	36
Intangible assets (Note 11)	104
Goodwill (Note 11)(1)	136
Other assets	11
Total fair value of assets acquired	349
Trade payables - third party and affiliates	(8	)
Total debt (Note 14)	(12	)
Deferred income taxes	(26	)
Benefit obligations	(15	)
Other liabilities(2)	(45	)
Total fair value of liabilities assumed	(106	)
Net assets acquired	243

______________________________

⁽¹⁾  Goodwill consists of expected revenue and operating synergies resulting from the acquisition. None of the goodwill is deductible for income tax purposes.

⁽²⁾  Includes a $29 million acquisition payment to Nilit Group after the date of close, which was paid as of June 30, 2017.

During the year endedDecember 31, 2017, transaction related costs of $3 million were expensed as incurred to Selling, general and administrative expenses in the consolidated statements of operations. The amount of pro forma Net earnings (loss) of Nilit included in the Company's consolidated statement of operations was less than 1% (unaudited) of its consolidated Net earnings (loss) had the acquisition occurred as of the beginning of 2017. The amount of Nilit Net earnings (loss) consolidated by the Company since the acquisition date was not material.

• SO.F.TER. S.r.l.

In December 2016, the Company acquired 100% of the stock of the Forli, Italy based SO.F.TER. S.r.l. ("SOFTER"), a leading thermoplastic compounder. The acquisition of SOFTER increases the Company's global engineered materials product platforms, extends the operational model, technical and industry solutions capabilities and expands project pipelines. The acquisition was accounted for as a business combination and the acquired operations are included in the Advanced Engineered Materials segment. The Company allocated the purchase price of the acquisition to identifiable assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date. The purchase price allocation was based on preliminary information. During the year endedDecember 31, 2017, the Company made certain adjustments to its purchase price allocation to adjust property, plant and equipment, inventory, accounts receivable and taxes, which resulted in a $6 million reduction to goodwill initially recorded.

Plant Closures

• Lanaken, Belgium

In December 2015, the Company announced it had ceased 50% of its manufacturing operations at its acetate tow facility in Lanaken, Belgium. The exit costs related to the capacity reduction at its Lanaken facility are included in Other (charges) gains, net in the consolidated statements of operations (Note 18). The Lanaken, Belgium operations are included in the Company's Consumer Specialties segment.

87

• Tarragona, Spain

In December 2015, the Company announced the sale of its conventional emulsions production facility. The Company was unable to find a credible buyer for the vinyl acetate ethylene ("VAE") emulsions facility, resulting in its closure. The Company completed the information and consultation process with employee representatives pursuant to which the Company ceased all manufacturing operations at the VAE emulsions facility. The exit costs, including long-lived asset impairment losses, related to the closure of the Tarragona VAE facility and the sale of the conventional facility are included in Other (charges) gains, net in the consolidated statements of operations (Note 18). The Tarragona, Spain operations are included in the Company's Industrial Specialties segment.

• Meredosia, Illinois

In December 2015, the Company ceased operation of its VAE emulsions facility in Meredosia, Illinois. The exit costs, including long-lived asset impairment losses, related to the closure of the VAE facility are included in Other (charges) gains, net in the consolidated statements of operations (Note 18). The Meredosia, Illinois operations are included in the Company's Industrial Specialties segment.

During the year ended December 31, 2015, the Company also recorded $39 million in accelerated depreciation expense related to property, plant and equipment no longer in use at the Company's ethanol technology development unit in Clear Lake, Texas. The accelerated depreciation is included in Research and development expenses in the consolidated statements of operations and is included in the Company's Acetyl Intermediates segment.

5. Ventures and Variable Interest Entities

Consolidated Variable Interest Entities

The Company has a joint venture, Fairway Methanol LLC ("Fairway"), with Mitsui & Co., Ltd., of Tokyo, Japan ("Mitsui"), in which the Company owns 50% of Fairway, for the production of methanol at the Company's integrated chemical plant in Clear Lake, Texas. The methanol unit utilizes natural gas in the US Gulf Coast region as a feedstock and benefits from the existing infrastructure at the Company's Clear Lake facility. Both Mitsui and the Company supply their own natural gas to Fairway in exchange for methanol tolling under a cost-plus off-take arrangement.

The Company determined that Fairway is a variable interest entity ("VIE") in which the Company is the primary beneficiary. Under the terms of the joint venture agreements, the Company provides site services and day-to-day operations for the methanol facility. In addition, the joint venture agreements provide that the Company indemnifies Mitsui for environmental obligations that exceed a specified threshold, as well as an equity option between the partners. Accordingly, the Company consolidates the venture and records a noncontrolling interest for the share of the venture owned by Mitsui. Fairway is included in the Company's Acetyl Intermediates segment.

88

The carrying amount of the assets and liabilities associated with Fairway included in the consolidated balance sheets are as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Cash and cash equivalents	19	18
Trade receivables, net - third party & affiliates	9	8
Property, plant and equipment (net of accumulated depreciation - 2017: $90; 2016: $50)	697	734
Intangible assets (net of accumulated amortization - 2017: $2; 2016: $1)	25	26
Other assets	6	9
Total assets(1)	756	795
Trade payables	16	15
Other liabilities(2)	4	2
Total debt	5	5
Deferred income taxes	3	2
Total liabilities	28	24

______________________________

⁽¹⁾  Assets can only be used to settle the obligations of Fairway.

⁽²⁾  Primarily represents amounts owed by Fairway to the Company for reimbursement of expenditures.

Nonconsolidated Variable Interest Entities

The Company holds variable interests in entities that supply certain raw materials and services to the Company. The variable interests primarily relate to cost-plus contractual arrangements with the suppliers and recovery of capital expenditures for certain plant assets plus a rate of return on such assets. Liabilities for such supplier recoveries of capital expenditures have been recorded as capital lease obligations. The entities are not consolidated because the Company is not the primary beneficiary of the entities as it does not have the power to direct the activities of the entities that most significantly impact the entities' economic performance. The Company's maximum exposure to loss as a result of its involvement with these VIEs as of December 31, 2017 relates primarily to the recovery of capital expenditures for certain property, plant and equipment.

The carrying amount of the assets and liabilities associated with the obligations to nonconsolidated VIEs, as well as the maximum exposure to loss relating to these nonconsolidated VIEs are as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Property, plant and equipment, net	53	60
Trade payables	25	53
Current installments of long-term debt	18	10
Long-term debt	76	91
Total liabilities	119	154
Maximum exposure to loss	164	240

The difference between the total liabilities associated with obligations to unconsolidated VIEs and the maximum exposure to loss primarily represents take-or-pay obligations for services included in the Company's unconditional purchase obligations (Note 24).

89

6. Marketable Securities, at Fair Value

The Company's nonqualified trusts hold available-for-sale securities for funding requirements of the Company's nonqualified pension plans (Note 15) as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Amortized cost	32	30
Gross unrealized gain	—	—
Gross unrealized loss	—	—
Fair value	32	30

7. Receivables, Net

	As of December 31,
	2017		2016
	(In $ millions)
Trade receivables - third party and affiliates	995		807
Allowance for doubtful accounts - third party and affiliates	(9	)	(6	)
Trade receivables - third party and affiliates, net	986		801

	As of December 31,
	2017	2016
	(In $ millions)
Non-income taxes receivable	81	83
Reinsurance receivables	16	16
Income taxes receivable	64	43
Other	83	81
Non-trade receivables, net	244	223

8. Inventories

	As of December 31,
	2017	2016
	(In $ millions)
Finished goods	591	506
Work-in-process	57	45
Raw materials and supplies	252	169
Total	900	720

9. Investments in Affiliates

Entities in which the Company has an investment accounted for under the cost or equity method of accounting are considered affiliates; any transactions or balances with such companies are considered affiliate transactions.

90

Equity Method

Equity method investments and ownership interests by business segment are as follows:

	Ownership as of December 31,		Carrying Value as of December 31,		Share of Earnings (Loss) Year Ended December 31,				Dividends and Other Distributions Year Ended December 31,
	2017	2016	2017	2016	2017	2016	2015		2017		2016		2015
	(In percentages)		(In $ millions)
Advanced Engineered Materials
Ibn Sina	25	25	178	113	58	38	88		(1	)	(18	)	(98	)
InfraServ GmbH & Co. Hoechst KG(1)	32	—	139	—	19	—	—		(26	)	—		—
Fortron Industries LLC	50	50	111	100	17	9	11		(6	)	(9	)	(8	)
Korea Engineering Plastics Co., Ltd.	50	50	155	137	25	25	16		(25	)	(11	)	(10	)
Polyplastics Co., Ltd.	45	45	170	156	57	50	35		(64	)	(54	)	(20	)
Other Activities(2)
InfraServ GmbH & Co. Gendorf KG(3)	39	39	41	38	4	7	7		(5	)	(5	)	(5	)
InfraServ GmbH & Co. Hoechst KG(1)	—	32	—	132	—	22	21		—		(30	)	(32	)
InfraServ GmbH & Co. Knapsack KG(3)	27	27	20	18	2	4	4		(4	)	(4	)	(3	)
Consumer Specialties
Sherbrooke Capital Health and Wellness, L.P.(4)	10	10	3	3	1	—	(1	)	—		—		—
Total			817	697	183	155	181		(131	)	(131	)	(176	)

______________________________

⁽¹⁾  InfraServ GmbH & Co. Hoechst KG is owned primarily by an entity included in the Company's Advanced Engineered Materials segment. Prior to 2017, InfraServ GmbH & Co. Hoechst KG was owned primarily by an entity included in the Company's Other Activities segment. The Company's Consumer Specialties segment and Acetyl Intermediates segment also each hold an ownership percentage.

⁽²⁾  InfraServ real estate service companies ("InfraServ Entities") own and operate sites in Frankfurt am Main-Hoechst, Gendorf and Knapsack, Germany. The InfraServ Entities were created to own land and property and to provide various technical and administrative services at these manufacturing locations.

⁽³⁾  See Note 29 for further information.

⁽⁴⁾  The Company accounts for its ownership interest in Sherbrooke Capital Health and Wellness, L.P. under the equity method of accounting because the Company is able to exercise significant influence.

91

Cost Method

Cost method investments and ownership interests by business segment are as follows:

	Ownership as of December 31,		Carrying Value as of December 31,		Dividend Income for the Year Ended December 31,
	2017	2016	2017	2016	2017	2016	2015
	(In percentages)		(In $ millions)
Consumer Specialties
Kunming Cellulose Fibers Co. Ltd.	30	30	14	14	12	14	14
Nantong Cellulose Fibers Co. Ltd.	31	31	109	106	81	80	79
Zhuhai Cellulose Fibers Co. Ltd.	30	30	30	30	14	13	13
Other Activities
InfraServ GmbH & Co. Wiesbaden KG	8	8	5	5	1	1	1
Other			1	—	—	—	—
Total			159	155	108	108	107

Transactions with Affiliates

The Company owns manufacturing facilities at the InfraServ location in Frankfurt am Main-Hoechst, Germany and has contractual agreements with the InfraServ Entities and certain other equity affiliates and investees accounted for under the cost method. These contractual agreements primarily relate to energy purchases, site services and purchases of product for consumption and resale.

Transactions and balances with affiliates are as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Purchases	250	203	195
Sales	—	2	—

	As of December 31,
	2017	2016
	(In $ millions)
Non-trade receivables	21	26
Total due from affiliates	21	26
Short-term borrowings(1)	32	17
Trade payables	36	45
Current Other liabilities	8	8
Total due to affiliates	76	70

______________________________

⁽¹⁾  The Company has agreements with certain affiliates whereby excess affiliate cash is lent to and managed by the Company at variable interest rates governed by those agreements.

92

10. Property, Plant and Equipment, Net

	As of December 31,
	2017		2016
	(In $ millions)
Land	47		38
Land improvements	72		70
Buildings and building improvements	758		695
Machinery and equipment	5,101		4,753
Construction in progress	368		260
Gross asset value	6,346		5,816
Accumulated depreciation	(2,584	)	(2,239	)
Net book value	3,762		3,577

Assets under capital leases, net, included in the amounts above are as follows:

	As of December 31,
	2017		2016
	(In $ millions)
Buildings	14		13
Machinery and equipment	296		291
Accumulated depreciation	(179	)	(149	)
Net book value	131		155

Capitalized interest costs and depreciation expense are as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Capitalized interest	6	5	15
Depreciation expense	285	281	346

During 2017 and 2016, certain long-lived assets were impaired (Note 18). No long-lived assets were impaired during 2015.

11. Goodwill and Intangible Assets, Net

Goodwill

	Advanced Engineered Materials		Consumer Specialties		Industrial Specialties		Acetyl Intermediates		Total
	(In $ millions)
As of December 31, 2015	282		230		39		154		705
Acquisitions (Note 4)	106		—		—		—		106
Exchange rate changes	(3	)	(5	)	(1	)	(6	)	(15	)
As of December 31, 2016	385		225		38		148		796
Acquisitions (Note 4)	128		—		—		—		128
Exchange rate changes	42		12		2		23		79
As of December 31, 2017(1)	555		237		40		171		1,003

______________________________

⁽¹⁾  There were $0 million of accumulated impairment losses as of December 31, 2017.

93

In connection with the Company's annual goodwill impairment assessment, the Company did not record an impairment loss to goodwill during the nine months ended September 30, 2017 as the estimated fair value for each of the Company's reporting units exceeded the carrying amount of the underlying assets by a substantial margin (Note 2). No events or changes in circumstances occurred during the three months ended December 31, 2017 that would indicate that the carrying amount of the assets may not be fully recoverable. Accordingly, no additional impairment analysis was performed during that period.

Intangible Assets, Net

Finite-lived intangible assets are as follows:

	Licenses		Customer- Related Intangible Assets		Developed Technology		Covenants Not to Compete and Other		Total
	(In $ millions)
Gross Asset Value
As of December 31, 2015	38		456		35		50		579
Acquisitions (Note 4)	—		64		—		3		67		(1)
Exchange rate changes	(2	)	(11	)	—		—		(13	)
As of December 31, 2016	36		509		35		53		633
Acquisitions (Note 4)	—		73		9		—		82		(2)
Exchange rate changes	2		58		1		1		62
As of December 31, 2017	38		640		45		54		777
Accumulated Amortization
As of December 31, 2015	(25	)	(449	)	(25	)	(29	)	(528	)
Amortization	(3	)	(2	)	(2	)	(2	)	(9	)
Exchange rate changes	1		11		1		—		13
As of December 31, 2016	(27	)	(440	)	(26	)	(31	)	(524	)
Amortization	(4	)	(11	)	(3	)	(2	)	(20	)
Exchange rate changes	(2	)	(45	)	(1	)	1		(47	)
As of December 31, 2017	(33	)	(496	)	(30	)	(32	)	(591	)
Net book value	5		144		15		22		186

______________________________

⁽¹⁾  Primarily related to intangible assets acquired from SOFTER (Note 4) during the year ended December 31, 2016, with a weighted average amortization period of 12 years.

⁽²⁾  Primarily related to intangible assets acquired from Nilit (Note 4) during the year ended December 31, 2017, with a weighted average amortization period of 14 years.

Indefinite-lived intangible assets are as follows:

	Trademarks and Trade Names
	(In $ millions)
As of December 31, 2015	74
Acquisitions (Note 4)	12
Exchange rate changes	(1	)
As of December 31, 2016	85
Acquisitions (Note 4)	22
Exchange rate changes	8
As of December 31, 2017	115

94

In connection with the Company's annual indefinite-lived intangible assets impairment assessment, the Company did not record an impairment loss to indefinite-lived intangible assets during the nine months ended September 30, 2017 as the estimated fair value for each of the Company's indefinite-lived intangible assets exceeded the carrying amount of the underlying asset by a substantial margin (Note 2). No events or changes in circumstances occurred during the three months ended December 31, 2017 that would indicate that the carrying amount of the assets may not be fully recoverable. Accordingly, no additional impairment analysis was performed during that period.

The Company's trademarks and trade names have an indefinite life. For the year ended December 31, 2017, the Company did not renew or extend any intangible assets.

Estimated amortization expense for the succeeding five fiscal years is as follows:

	(In $ millions)
2018	19
2019	17
2020	15
2021	15
2022	14

12. Current Other Liabilities

	As of December 31,
	2017	2016
	(In $ millions)
Asset retirement obligations	19	9
Benefit obligations (Note 15)	30	31
Customer rebates	65	51
Derivatives (Note 22)	3	3
Environmental (Note 16)	14	14
Insurance	5	6
Interest	17	15
Restructuring (Note 18)	5	16
Salaries and benefits	113	97
Sales and use tax/foreign withholding tax payable	16	21
Other	67	59
Total	354	322

13. Noncurrent Other Liabilities

	As of December 31,
	2017	2016
	(In $ millions)
Asset retirement obligations	7	20
Deferred proceeds	47	41
Deferred revenue	6	9
Environmental (Note 16)	59	50
Income taxes payable (Note 19)	197	6
Insurance	43	46
Other	54	43
Total	413	215

95

Changes in asset retirement obligations are as follows:

	Year Ended December 31,
	2017		2016		2015
	(In $ millions)
Balance at beginning of year	29		36		37
Additions(1)	—		2		—
Accretion	1		1		1
Payments	(5	)	(10	)	(4	)
Revisions to cash flow estimates(2)	1		—		2
Balance at end of year	26		29		36

______________________________

⁽¹⁾  Primarily relates to sites which management no longer considers to have an indeterminate life.

⁽²⁾  Primarily relates to revisions to the estimated cost and timing of future obligations.

Included in the asset retirement obligations for the years ended December 31, 2017 and 2016 is $10 million and $10 million, respectively, related to indemnifications received for a business acquired in 2005. The corresponding $10 million receivable is included in Non-trade receivables, net in the consolidated balance sheet as of December 31, 2017.

14. Debt

	As of December 31,
	2017	2016
	(In $ millions)
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates
Current installments of long-term debt	63	27
Short-term borrowings, including amounts due to affiliates(1)	86	68
Short-term SOFTER bank loans (Note 4)(2)	—	23
Revolving credit facility(3)	97	—
Accounts receivable securitization facility(4)	80	—
Total	326	118

______________________________

⁽¹⁾  The weighted average interest rate was 2.8% and 3.1% as of December 31, 2017 and 2016, respectively.

⁽²⁾  The weighted average interest rate was 1.2% as of December 31, 2016.

⁽³⁾  The weighted average interest rate was 4.1% as of December 31, 2017.

⁽⁴⁾  The weighted average interest rate was 2.1% as of December 31, 2017.

96

	As of December 31,
	2017		2016
	(In $ millions)
Long-Term Debt
Senior unsecured term loan due 2021(1)	494		500
Senior unsecured notes due 2019, interest rate of 3.250%	360		316
Senior unsecured notes due 2021, interest rate of 5.875%	400		400
Senior unsecured notes due 2022, interest rate of 4.625%	500		500
Senior unsecured notes due 2023, interest rate of 1.125%	897		788
Senior unsecured notes due 2025, interest rate of 1.250%	359		—
Pollution control and industrial revenue bonds due at various dates through 2030, interest rates ranging from 4.05% to 5.00%	169		170
SOFTER bank loans due at various dates through 2021(Note 4)(2)	—		47
Nilit bank loans due at various dates through 2026 (Note 4)(3)	11		—
Obligations under capital leases due at various dates through 2054	208		217
Subtotal	3,398		2,938
Unamortized debt issuance costs(4)	(20	)	(21	)
Current installments of long-term debt	(63	)	(27	)
Total	3,315		2,890

______________________________

⁽¹⁾  The margin for borrowings under the senior unsecured term loan due 2021 was 1.5% above LIBOR at current Celanese credit ratings.

⁽²⁾  The weighted average interest rate was 1.6% as of December 31, 2016.

⁽³⁾  The weighted average interest rate was 1.3% as of December 31, 2017.

⁽⁴⁾  Related to the Company's long-term debt, excluding obligations under capital leases.

Senior Credit Facilities

In July 2016, Celanese, Celanese US and certain subsidiaries entered into a new senior credit agreement (the "Credit Agreement") consisting of a $500 million senior unsecured term loan and a $1.0 billion senior unsecured revolving credit facility (with a letter of credit sublimit), each maturing in 2021. The Credit Agreement is guaranteed by Celanese, Celanese US and substantially all of its domestic subsidiaries ("the Subsidiary Guarantors").

The Company's debt balances and amounts available for borrowing under its senior unsecured revolving credit facility are as follows:

	As of December 31, 2017
	(In $ millions)
Revolving Credit Facility
Borrowings outstanding(1)	97
Letters of credit issued	—
Available for borrowing(2)	903

______________________________

⁽¹⁾  The Company borrowed $528 million and repaid $431 million under its senior unsecured revolving credit facility during the year ended December 31, 2017.

⁽²⁾  The margin for borrowings under the senior unsecured revolving credit facility were 1.5% above LIBOR at current Company credit ratings.

97

Senior Notes

The Company has outstanding senior unsecured notes, issued in public offerings registered under the Securities Act of 1933 ("Securities Act"), as amended (collectively, the "Senior Notes"). The Senior Notes were issued by Celanese US and are guaranteed on a senior unsecured basis by Celanese and the Subsidiary Guarantors. Celanese US may redeem some or all of each of the Senior Notes, prior to their respective maturity dates, at a redemption price of 100% of the principal amount, plus a "make-whole" premium as specified in the applicable indenture, plus accrued and unpaid interest, if any, to the redemption date.

On December 11, 2017, Celanese US completed an offering of €300 million in principal amount of 1.250% senior unsecured notes due February 11, 2025 (the "1.250% Notes") in a public offering registered under the Securities Act. The 1.250% Notes were issued under a base indenture dated May 6, 2011. The 1.250% Notes were issued at a discount to par at a price of 99.810%, which is being amortized to Interest expense in the consolidated statements of operations over the term of the 1.250% Notes. Commencing November 11, 2024 through the redemption date, February 11, 2025, Celanese US may redeem some or all of the 1.250% Notes at any time and from time to time at a redemption price of 100% of the principal amount, plus accrued and unpaid interest, if any, to the redemption date.

In September 2016, Celanese US completed an offering of €750 million in principal amount of 1.125% senior unsecured notes due September 26, 2023 (the "1.125% Notes") in a public offering registered under the Securities Act. The 1.125% Notes were issued under a base indenture dated May 6, 2011. The 1.125% Notes were issued at a discount to par at a price of 99.713%, which is being amortized to Interest expense in the consolidated statements of operations over the term of the 1.125% Notes. Net proceeds from the sale of the 1.125% Notes were used to repay $411 million of outstanding borrowings under the new senior unsecured revolving credit facility and for general corporate purposes. Commencing June 26, 2023 through the redemption date, September 26, 2023, Celanese US may redeem some or all of the 1.125% Notes at any time and from time to time at a redemption price of 100% of the principal amount, plus accrued and unpaid interest, if any, to the redemption date.

SOFTER Bank Loans

In January 2017, the Company repaid $69 million of the $70 million SOFTER bank loans outstanding at December 31, 2016 with cash on hand.

Accounts Receivable Securitization Facility

The Company has a US accounts receivable securitization facility involving receivables of certain of its domestic subsidiaries of the Company transferred to a wholly-owned, "bankruptcy remote" special purpose subsidiary of the Company ("SPE"). The securitization facility, which permits cash borrowings and letters of credit, expires in July 2019. All of the SPE's assets have been pledged to the administrative agent in support of the SPE's obligations under the facility.

The Company's debt balances and amounts available for borrowing under its securitization facility are as follows:

	As of December 31, 2017
	(In $ millions)
Accounts Receivable Securitization Facility
Borrowings outstanding(1)	80
Letters of credit issued	29
Available for borrowing	11
Total borrowing base	120
Maximum borrowing base(2)	120

______________________________

⁽¹⁾  The Company borrowed $85 million and repaid $5 million during the year ended December 31, 2017.

⁽²⁾  Outstanding accounts receivable transferred to the SPE was $158 million.

98

Principal payments scheduled to be made on the Company's debt, including short-term borrowings, are as follows:

	(In $ millions)
2018	326
2019	437
2020	80
2021	794
2022	526
Thereafter	1,498
Total	3,661

Net deferred financing costs are as follows:

	(In $ millions)
As of December 31, 2014	27
Financing costs deferred	—
Accelerated amortization due to refinancing activity	—
Amortization	(5	)
As of December 31, 2015(1)	22
Financing costs deferred(2)	13
Accelerated amortization due to refinancing activity(3)	(3	)
Amortization	(5	)
As of December 31, 2016(1)	27
Financing costs deferred(4)	1
Accelerated amortization due to refinancing activity	—
Amortization	(4	)
As of December 31, 2017(1)	24

____________________________

⁽¹⁾  Includes $4 million, $6 million and $4 million as of December 31,2017, 2016 and 2015, respectively, related to the Company's revolving credit facility and accounts receivables securitization facility, which are included in noncurrent Other assets in the consolidated balance sheets.

⁽²⁾  Includes $5 million, $6 million and $2 million related to the Credit Agreement, the 1.125% Notes and the pollution control and industrial revenue bonds, respectively, all of which are being amortized through the term of the respective financing arrangement.

⁽³⁾  Includes $2 million and $1 million related to the senior secured credit facilities and the pollution control and industrial revenue bonds, respectively, which are included in Refinancing expense in the consolidated statement of operations during the year ended December 31, 2016.

⁽⁴⁾  Related to the 1.250% Notes, which are being amortized through the term of the 1.250% Notes.

Covenants

The Company's material financing arrangements contain customary covenants, including the maintenance of certain financial ratios, events of default and change of control provisions. Failure to comply with these covenants, or the occurrence of any other event of default, could result in acceleration of the borrowings and other financial obligations. The Company is in compliance with all of the covenants related to its debt agreements as of December 31, 2017.

99

15. Benefit Obligations

Pension Obligations 

The Company sponsors defined benefit pension plans in North America, Europe and Asia. Independent trusts or insurance companies administer the majority of these plans. Pension obligations are established for benefits payable in the form of retirement, disability and surviving dependent pensions. The commitments result from participation in defined contribution and defined benefit plans, primarily in the US. Benefits are dependent on years of service and the employee's compensation. Supplemental retirement benefits provided to certain employees are nonqualified for US tax purposes. Separate nonqualified trusts have been established for certain US nonqualified plan obligations. Pension costs under the Company's retirement plans are actuarially determined.

In October 2014, the Company offered a limited-time, voluntary program to certain participants of the Company's US qualified defined benefit pension plan with a vested benefit who terminated from the Company on or before May 31, 2014. The limited-time opportunity ended in November 2014 and included an offer of a single lump sum payment in December 2014 or to begin monthly annuity payments, regardless of age, or to continue to defer benefits until retirement age. If an election was not made by the eligible participant, the participant will begin receiving payments when otherwise eligible under the terms of the US qualified defined benefit pension plan.

Effective June 2014, the Company's US qualified defined benefit plan was amended and benefits offered to all current union participants of the Cash Balance Plan (hired on or after January 1, 2001) at the Company's Narrows, Virginia facility have been frozen and the US qualified defined benefit plan was closed to future union participants at the facility. Accumulated benefits earned and service rendered through May 2014 under the Plan provisions for the Cash Balance Plan Participants will continue to be considered for purposes of determining retirement benefits. Effective May 2014, the Company's US qualified defined benefit plan was amended and benefits offered to all current union participants of the Flat Rate Plan at the Company's Narrows, Virginia facility have been frozen and the US qualified defined benefit plan was closed to future union participants at the facility. Accumulated benefits earned and service rendered through December 2014 under the Plan provisions for the Flat Rate Plan Participants will continue to be considered for purposes of determining retirement benefits and eligibility for early retirement. These actions did not result in a curtailment gain or loss as the projected benefit obligation does not rely on salary assumptions.

Effective December 2013, benefits offered to all US non-union eligible employees in the Company's US qualified defined benefit pension plan have been frozen and the US qualified defined benefit pension plan was closed to new participants. Accumulated benefits earned and service rendered through December 31, 2013 under the US qualified defined benefit pension plan provisions will continue to be considered for purposes of determining retirement benefits and eligibility for early retirement.

The Company participates in a multiemployer defined benefit plan and a multiemployer defined contribution plan in Germany covering certain employees. The Company's contributions to the multiemployer defined benefit plan are based on specified percentages of employee contributions as outlined in a works council agreement, covering all German entity employees hired prior to January 1, 2012. As of January 1, 2012, the multiemployer defined benefit pension plan described above was closed to new employees. Qualifying employees hired in Germany after December 31, 2011 are covered by a multiemployer defined contribution plan. The Company's contributions to the multiemployer defined contribution plan are based on specified percentages of employee contributions, similar to the multiemployer defined benefit plan, but at a lower rate.

Statutory regulations and the works council agreement require the contributions to fully fund the multiemployer plans. The risks of participating in the multiemployer plans are different from single-employer plans in the following aspects:

• Assets contributed to the multiemployer plan by one employer may be used to provide benefits to employees of other participating employers.

• If a participating employer stops contributing to the plan, any underfunding may be borne by the remaining participants, especially since regulations strictly enforce funding requirements.

• If the Company chooses to stop participating in the multiemployer plan, the Company may be required to pay the plan an amount based on the underfunded status of the plan, referred to as the withdrawal liability.

100

Based on the 2017 unaudited and 2016 audited multiemployer defined benefit plan's financial statements, the plan is 100% funded in 2017, 2016 and 2015. The number of employees covered by the Company's multiemployer defined benefit plan remained relatively stable year over year from 2015 to 2017, resulting in minimal changes to employer contributions. Participation in the German multiemployer defined benefit plan is not considered individually significant to the Company.

Contributions made by the Company to the German multiemployer plan are as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Multiemployer defined benefit plan	7	7	6

Other Postretirement Obligations

Certain retired employees receive postretirement health care and life insurance benefits under plans sponsored by the Company, which has the right to modify or terminate these plans at any time. The cost for coverage is shared between the Company and the retiree. The cost of providing retiree health care and life insurance benefits is actuarially determined and accrued over the service period of the active employee group. The Company's policy is to fund benefits as claims and premiums are paid. The US postretirement health care plan was closed to new participants effective January 1, 2006.

Postemployment Obligations

The Company provides benefits to certain employees after employment but prior to retirement, including severance and disability-related benefits offered pursuant to ongoing benefit arrangements. The cost of providing postemployment benefits is actuarially determined and recorded when the obligation is probable of occurring and can be reasonably estimated.

Postemployment obligations are as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Postemployment benefits	8	9

Defined Contribution Plans

The Company sponsors various defined contribution plans in North America, Europe and Asia covering certain employees. Employees may contribute to these plans and the Company will match these contributions in varying amounts. The Company's matching contribution to the defined contribution plans are based on specified percentages of employee contributions.

Beginning in 2014, the Company took the following actions as it relates to the US defined contribution plan:

• Increased its employer match for those employees participating in the US defined contribution plan;

• Added an annual retirement contribution for US employees who are employed as of December 31st each year (or have died during that year), regardless of whether the employee contributes to the US defined contribution plan; and

• For certain eligible US employees, provides an incremental retirement contribution through 2017, based on years of service and specified percentages of eligible compensation.

The amount of costs recognized for the Company's defined contribution plans are as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Defined contribution plans	40	43	44

101

Summarized information on the Company's pension and postretirement benefit plans is as follows:

	Pension Benefits As of December 31,				Postretirement Benefits As of December 31,
	2017		2016		2017		2016
	(In $ millions)
Change in Projected Benefit Obligation
Projected benefit obligation as of beginning of period	3,610		3,635		67		66
Service cost	9		8		1		—
Interest cost	107		113		1		2
Participant contributions	—		—		—		—
Plan amendments	—		—		—		—
Net actuarial (gain) loss(1)	151		102		(2	)	3
Divestitures	—		—		—		—
Settlements	(1	)	(1	)	—		—
Benefits paid	(233	)	(232	)	(4	)	(4	)
Federal subsidy on Medicare Part D	—		—		—		—
Curtailments	—		—		—		—
Special termination benefits	1		3		—		—
Exchange rate changes	69		(18	)	3		—
Other(2)	15		—		—		—
Projected benefit obligation as of end of period	3,728		3,610		66		67
Change in Plan Assets
Fair value of plan assets as of beginning of period	2,784		2,508		—		—
Actual return on plan assets	302		177		—		—
Employer contributions	359		346		4		4
Participant contributions	—		—		—		—
Settlements	(1	)	(1	)	—		—
Benefits paid(3)	(233	)	(232	)	(4	)	(4	)
Exchange rate changes	40		(14	)	—		—
Fair value of plan assets as of end of period	3,251		2,784		—		—
Funded status as of end of period	(477	)	(826	)	(66	)	(67	)
Amounts Recognized in the Consolidated Balance Sheets Consist of:
Noncurrent Other assets	64		22		—		—
Current Other liabilities	(24	)	(25	)	(5	)	(5	)
Benefit obligations	(517	)	(823	)	(61	)	(62	)
Net amount recognized	(477	)	(826	)	(66	)	(67	)
Amounts Recognized in Accumulated Other Comprehensive Income Consist of:
Net actuarial (gain) loss(4)	9		18		—		—
Prior service (benefit) cost	(1	)	(1	)	1		(1	)
Net amount recognized(5)	8		17		1		(1	)

______________________________

⁽¹⁾  Primarily relates to change in discount rates.

⁽²⁾  Primarily relates to the acquisition of Nilit (Note 4).

⁽³⁾  Includes benefit payments to nonqualified pension plans of $22 million and $22 million as of December 31, 2017 and 2016, respectively.

102

⁽⁴⁾  Relates to the pension plans of the Company's equity method investments.

⁽⁵⁾  Amount shown net of an income tax benefit of $6 million and $4 million as of December 31, 2017 and 2016, respectively, in the consolidated statements of equity (Note 17).

The percentage of US and international projected benefit obligation at the end of the period is as follows:

	Pension Benefits As of December 31,		Postretirement Benefits As of December 31,
	2017	2016	2017	2016
	(In percentages)
US plans	83	85	54	57
International plans	17	15	46	43
Total	100	100	100	100

The percentage of US and international fair value of plan assets at the end of the period is as follows:

	Pension Benefits As of December 31,
	2017	2016
	(In percentages)
US plans	88	88
International plans	12	12
Total	100	100

Pension plans with projected benefit obligations in excess of plan assets are as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Projected benefit obligation	882	3,559
Fair value of plan assets	341	2,711

Pension plans with accumulated benefit obligations in excess of plan assets are as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Accumulated benefit obligation	861	3,538
Fair value of plan assets	338	2,708

The accumulated benefit obligation for all defined benefit pension plans is as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Accumulated benefit obligation	3,710	3,591

Beginning in 2016, the Company adopted a full yield curve approach to estimate the service and interest cost components of net periodic benefit cost (Note 2). The Company's adoption of the full yield curve approach reduced 2016 service and interest cost by $29 million as compared to the previous single weighted average discount rate method.

103

The components of net periodic benefit cost are as follows:

	Pension Benefits Year Ended December 31,						Postretirement Benefits Year Ended December 31,
	2017		2016		2015		2017		2016		2015
	(In $ millions)
Service cost	9		8		12		1		—		1
Interest cost	107		113		139		1		2		3
Expected return on plan assets	(198	)	(177	)	(209	)	—		—		—
Amortization of prior service cost / (credit)	—		—		—		(1	)	(3	)	—
Recognized actuarial (gain) loss	48		101		134		(2	)	2		(7	)
Curtailment (gain) loss	—		—		(3	)	—		—		—
Settlement (gain) loss	—		—		—		—		—		—
Special termination benefit	1		3		2		—		—		—
Total	(33	)	48		75		(1	)	1		(3	)

Amortization of Accumulated other comprehensive income (loss), net into net periodic benefit cost in 2018 is expected to be as follows:

	Pension Benefits	Postretirement Benefits
	(In $ millions)
Prior service cost	—	—

The Company maintains nonqualified pension plans funded with nonqualified trusts for certain US employees as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Nonqualified Trust Assets
Marketable securities, at fair value	32	30
Noncurrent Other assets, consisting of insurance contracts	42	49
Nonqualified Pension Obligations
Current Other liabilities	22	22
Benefit obligations	237	241

Expense relating to the nonqualified pension plans included in net periodic benefit cost, excluding returns on the assets held by the nonqualified trusts, is as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Total	18	18	—	(1)

______________________________

⁽¹⁾  Actuarial gain offset interest cost.

104

Valuation

The principal weighted average assumptions used to determine benefit obligation are as follows:

	Pension Benefits As of December 31,		Postretirement Benefits As of December 31,
	2017	2016	2017	2016
	(In percentages)
Discount Rate Obligations
US plans	3.5	3.9	3.4	3.8
International plans	2.1	2.1	3.2	3.3
Combined	3.3	3.7	3.2	3.4
Rate of Compensation Increase
US plans	N/A	N/A
International plans	2.8	2.8
Combined	2.8	2.8

The principal weighted average assumptions used to determine net periodic benefit cost are as follows:

	Pension Benefits Year Ended December 31,			Postretirement Benefits Year Ended December 31,
	2017	2016	2015	2017	2016	2015
	(In percentages)
Discount Rate Obligations
US plans	3.9	4.2	3.9	3.8	4.0	3.7
International plans	2.1	2.6	2.4	3.3	3.6	3.5
Combined	3.7	4.0	3.7	3.4	3.9	3.6
Discount Rate Service Cost(1)
US plans	1.2	4.5	3.9	4.0	4.2	3.7
International plans	2.5	3.1	2.4	3.4	3.8	3.5
Combined	2.5	3.1	3.7	2.9	3.8	3.6
Discount Rate Interest Cost(1)
US plans	3.3	3.4	3.9	3.1	3.1	3.7
International plans	1.7	2.2	2.4	2.9	3.1	3.5
Combined	3.1	3.2	3.7	2.9	3.1	3.6
Expected Return on Plan Assets
US plans	7.5	7.5	8.0
International plans	5.9	6.1	6.0
Combined	7.3	7.3	7.8
Rate of Compensation Increase
US plans	N/A	N/A	N/A
International plans	2.8	2.7	2.8
Combined	2.8	2.7	2.8

______________________________

⁽¹⁾  Beginning in 2016, weighted-average discount rates reflect the adoption of the full yield curve approach.

105

The Company's health care cost trend assumptions for US postretirement medical plan's net periodic benefit cost are as follows:

	As of December 31,
	2017	2016	2015
	(In percentages, except year)
Health care cost trend rate assumed for next year	9.0	9.5	10.0
Health care cost trend ultimate rate	5.0	5.0	5.0
Health care cost trend ultimate rate year	2026	2026	2026

Assumed health care cost trend rates for US postretirement medical plans have a significant effect on the amounts reported for the health care plans.

The impact of a one percentage point change in the assumed health care cost trend is as follows:

	Trend Rate Change
	Decreases 1%	Increases 1%
	(In $ millions)
Postretirement obligations	2	2
Service and interest cost	—	—

Plan Assets

The weighted average target asset allocations for the Company's pension plans in 2017 are as follows:

	US Plans	International Plans
	(In percentages)
Bonds - domestic to plans	75	59
Equities - domestic to plans	8	16
Equities - international to plans	7	—
Other	10	25
Total	100	100

On average, the actual return on the US qualified defined pension plans' assets over the long-term (20 years) has exceeded the expected long-term rate of asset return assumption. The US qualified defined benefit plans' actual return on assets for the year ended December 31, 2017 was 11.4% versus an expected long-term rate of asset return assumption of 7.5%. The expected long-term rate of asset return assumption used to determine 2018 net periodic benefit cost is 6.8% for the US qualified defined benefit plans.

The Company's defined benefit plan assets are measured at fair value on a recurring basis (Note 2) as follows:

Cash and Cash Equivalents: Foreign and domestic currencies as well as short term securities are valued at cost plus accrued interest, which approximates fair value.

Equity securities, treasuries and corporate debt: Valued at the closing price reported on the active market in which the individual securities are traded. Automated quotes are provided by multiple pricing services and validated by the plan custodian. These securities are traded on exchanges as well as in the over the counter market.

Registered Investment Companies: Composed of various mutual funds and other investment companies whose diversified portfolio is comprised of foreign and domestic equities, fixed income securities, and short-term investments. Investments are valued at the net asset value of units held by the plan at year-end.

Common/Collective Trusts: Composed of various funds whose diversified portfolio is comprised of foreign and domestic equities, fixed income securities, and short-term investments. Investments are valued at the net asset value of units held by the plan at year-end.

106

Derivatives: Derivative financial instruments are valued in the market using discounted cash flow techniques. These techniques incorporate Level 1 and Level 2 fair value measurement inputs such as interest rates and foreign currency exchange rates. These market inputs are utilized in the discounted cash flow calculation considering the instrument's term, notional amount, discount rate and credit risk. Significant inputs to the derivative valuation for interest rate swaps, foreign currency forwards and swaps, and options are observable in the active markets and are classified as Level 2 in the fair value measurement hierarchy.

Mortgage backed securities: Fair value is estimated based on valuations obtained from third-party pricing services for identical or comparable assets. Mortgage Backed Securities are traded in the over the counter broker/dealer market.

Insurance contracts: Valued at contributions made, plus earnings, less participant withdrawals and administrative expenses, which approximates fair value.

Short-term investment funds: Composed of various funds whose portfolio is comprised of foreign and domestic currencies as well as short-term securities. Investments are valued at the net asset value of units held by the plan at year-end.

Other: Composed of real estate investment trust common stock valued at closing price as reported on the active market in which the individual securities are traded.

107

	Fair Value Measurement
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Total
	As of December 31,
	2017	2016	2017	2016	2017	2016
	(In $ millions)
Assets
Cash and cash equivalents	5	2	—	—	5	2
Derivatives
Swaps	—	—	8	2	8	2
Equity securities
US companies	—	260	—	—	—	260
International companies	72	345	—	—	72	345
Fixed income
Corporate debt	—	—	776	798	776	798
Treasuries, other debt	48	37	1,411	793	1,459	830
Mortgage backed securities	—	—	7	7	7	7
Insurance contracts	—	—	36	31	36	31
Other	4	24	1	—	5	24
Total investments, at fair value(1)	129	668	2,239	1,631	2,368	2,299
Liabilities
Derivatives
Swaps	—	—	7	2	7	2
Other	—	—	—	1	—	1
Total liabilities	—	—	7	3	7	3
Total net assets(2)	129	668	2,232	1,628	2,361	2,296

______________________________

⁽¹⁾  In accordance with ASU 2015-07 (Note 2), certain investments that are measured at fair value using the NAV per share practical expedient have not been classified in the fair value hierarchy. Total investments, at fair value, for the year ended December 31, 2017 excludes investments in common/collective trusts, registered investment companies and short-term investment funds with fair values of $727 million, $60 million and $96 million, respectively. Total investments, at fair value, for the year ended December 31, 2016 excludes investments in common/collective trusts, registered investment companies and short-term investment funds with fair values of $195 million, $134 million and $149 million, respectively.

⁽²⁾  Total net assets excludes non-financial plan receivables and payables of $25 million and $18 million, respectively, as of December 31, 2017 and $20 million and $10 million, respectively, as of December 31, 2016. Non-financial items include due to/from broker, interest receivables and accrued expenses.

108

Benefit obligation funding is as follows:

	Total Expected 2018
	(In $ millions)
Cash contributions to defined benefit pension plans	23
Benefit payments to nonqualified pension plans	21
Benefit payments to other postretirement benefit plans	5

The Company's estimates of its US defined benefit pension plan contributions reflect the provisions of the Pension Protection Act of 2006.

Pension and postretirement benefits expected to be paid are as follows:

	Pension Benefit Payments(1)	Company Portion of Postretirement Benefit Cost(2)
	(In $ millions)
2018	235	5
2019	233	5
2020	231	4
2021	227	4
2022	224	4
2023-2027	1,090	18

______________________________

⁽¹⁾  Payments are expected to be made primarily from plan assets.

⁽²⁾  Payments are expected to be made primarily from Company assets.

16. Environmental

The Company is subject to environmental laws and regulations worldwide that impose limitations on the discharge of pollutants into the air and water, establish standards for the treatment, storage and disposal of solid and hazardous wastes, and impose record keeping and notification requirements. Failure to timely comply with these laws and regulations may expose the Company to penalties. The Company believes that it is in substantial compliance with all applicable environmental laws and regulations and engages in an on going process of updating its controls to mitigate compliance risks. The Company is also subject to retained environmental obligations specified in various contractual agreements arising from the divestiture of certain businesses by the Company or one of its predecessor companies.

The components of environmental remediation reserves are as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Demerger obligations (Note 24)	28	18
Divestiture obligations (Note 24)	17	16
Active sites	15	16
US Superfund sites	11	11
Other environmental remediation reserves	2	3
Total	73	64

109

Remediation

Due to its industrial history and through retained contractual and legal obligations, the Company has the obligation to remediate specific areas on its own sites as well as on divested, demerger, orphan or US Superfund sites (as defined below). In addition, as part of the demerger agreement between the Company and Hoechst AG ("Hoechst"), a specified portion of the responsibility for environmental liabilities from a number of Hoechst divestitures was transferred to the Company (Note 24). Certain of these sites, at which the Company maintains continuing involvement, were and continue to be designated as discontinued operations when closed. The Company provides for such obligations when the event of loss is probable and reasonably estimable. The Company believes that environmental remediation costs will not have a material adverse effect on the financial position of the Company, but may have a material adverse effect on the results of operations or cash flows in any given period.

The Company did not record any insurance recoveries during 2017 or have any receivables for insurance recoveries related to these matters as of December 31, 2017. As of December 31, 2017 and 2016, there were receivables of $3 million and $2 million, respectively, from the former owner of the Company's Spondon, Derby, United Kingdom acetate flake, tow and film business, which was acquired in 2007.

German InfraServ Entities

The Company's InfraServ Entities (Note 9) are liable for any residual contamination and other pollution because they own the real estate on which the individual facilities operate. In addition, Hoechst, and its legal successors, as the responsible party under German public law, is liable to third parties for all environmental damage that occurred while it was still the owner of the plants and real estate (Note 24). The contribution agreements entered into in 1997 between Hoechst and the respective operating companies, as part of the divestiture of these companies, provide that the operating companies will indemnify Hoechst, and its legal successors, against environmental liabilities resulting from the transferred businesses. Additionally, the InfraServ Entities have agreed to indemnify Hoechst, and its legal successors, against any environmental liability arising out of or in connection with environmental pollution of any site.

The InfraServ partnership agreements provide that, as between the partners, each partner is responsible for any contamination caused predominantly by such partner. Any liability, which cannot be attributed to an InfraServ partner and for which no third party is responsible, is required to be borne by the InfraServ partnership. Also, under lease agreements entered into by an InfraServ partner as landlord, the tenants agreed to pay certain remediation costs on a pro rata basis.

If an InfraServ partner defaults on its respective indemnification obligations to eliminate residual contamination, the owners of the remaining participation in the InfraServ companies have agreed to fund such liabilities, subject to a number of limitations. To the extent that any liabilities are not satisfied by either the InfraServ Entities or their owners, these liabilities are to be borne by the Company in accordance with the demerger agreement. However, Hoechst, and its legal successors, will reimburse the Company for two-thirds of any such costs. Likewise, in certain circumstances the Company could be responsible for the elimination of residual contamination on several sites that were not transferred to InfraServ companies, in which case Hoechst, and its legal successors, must also reimburse the Company for two-thirds of any costs so incurred.

The Company's ownership interest and environmental liability participation percentages for such liabilities, which cannot be attributed to an InfraServ partner are as follows:

	As of December 31, 2017
	Ownership	Liability	Reserves(1)
	(In percentages)		(In $ millions)
InfraServ GmbH & Co. Gendorf KG(2)	39	10	9
InfraServ GmbH & Co. Hoechst KG	32	40	71
InfraServ GmbH & Co. Knapsack KG(2)	27	22	1

______________________________

⁽¹⁾  Gross reserves maintained by the respective InfraServ entity.

⁽²⁾  See Note 29 for further information.

110

US Superfund Sites

In the US, the Company may be subject to substantial claims brought by US federal or state regulatory agencies or private individuals pursuant to statutory authority or common law. In particular, the Company has a potential liability under the US Federal Comprehensive Environmental Response, Compensation and Liability Act of 1980, as amended, and related state laws (collectively referred to as "Superfund") for investigation and cleanup costs at certain sites. At most of these sites, numerous companies, including the Company, or one of its predecessor companies, have been notified that the US Environmental Protection Agency ("EPA"), state governing bodies or private individuals consider such companies to be potentially responsible parties ("PRP") under Superfund or related laws. The proceedings relating to these sites are in various stages. The cleanup process has not been completed at most sites, and the status of the insurance coverage for some of these proceedings is uncertain. Consequently, the Company cannot accurately determine its ultimate liability for investigation or cleanup costs at these sites.

As events progress at each site for which it has been named a PRP, the Company accrues, as appropriate, a liability for site cleanup. Such liabilities include all costs that are probable and can be reasonably estimated. In establishing these liabilities, the Company considers the contaminants of concern, the potential impact thereof, the relationship of contaminants of concern to its current and historic operations, its shipment of waste to a site, its percentage of total waste shipped to the site, the types of wastes involved, the conclusions of any studies, the magnitude of any remedial actions that may be necessary and the number and viability of other PRPs. Often the Company joins with other PRPs to sign joint defense agreements that settle, among PRPs, each party's percentage allocation of costs at the site. Although the ultimate liability may differ from the estimate, the Company routinely reviews the liabilities and revises the estimate, as appropriate, based on the most current information available.

One such site is the Diamond Alkali Superfund Site, which is comprised of a number of sub-sites, including the Lower Passaic River Study Area, which is the lower 17-mile stretch of the Passaic River ("Lower Passaic River Site"), and the Newark Bay Area. The Company and 70 other companies are parties to a May 2007 Administrative Order on Consent with the EPA to perform a Remedial Investigation/Feasibility Study ("RI/FS") at the Lower Passaic River Site in order to identify the levels of contaminants and potential cleanup actions, including the potential migration of contaminants between the Lower Passaic River Site and the Newark Bay Area. Work on the RI/FS is ongoing, with a goal to complete it in 2018.

On March 3, 2016, the EPA issued its final Record of Decision concerning the remediation of the lower 8.3 miles of the Lower Passaic River Site ("Lower 8.3 Miles"). Pursuant to the EPA's Record of Decision, the Lower 8.3 Miles must be dredged bank to bank and an engineered cap must be installed at an EPA estimated cost of approximately $1.4 billion. The Company owned and/or operated facilities in the vicinity of the Lower 8.3 Miles, but has found no evidence that it contributed any of the primary contaminants of concern to the Passaic River. The Company is vigorously defending this matter and currently believes that its ultimate allocable share of the cleanup costs with respect to the Lower Passaic River Site, estimated at less than 1%, will not be material to the Company's results of operations, cash flows or financial position.

17. Stockholders' Equity

Common Stock

The Company's Board of Directors follows a policy of declaring, subject to legally available funds, a quarterly cash dividend on each share of the Company's Common Stock, unless the Company's Board of Directors, in its sole discretion, determines otherwise.

The Company's Board of Directors approved increases in the Company's Common Stock cash dividend rates as follows:

	Increase	Quarterly Common Stock Cash Dividend	Annual Common Stock Cash Dividend	Effective Date
	(In percentages)	(In $ per share)
April 2015	20	0.30	1.20	May 2015
April 2016	20	0.36	1.44	May 2016
April 2017	28	0.46	1.84	May 2017

On February 8, 2018, the Company declared a quarterly cash dividend of $0.46 per share on its Common Stock amounting to $62 million. The cash dividend will be paid on March 2, 2018 to holders of record as of February 20, 2018.

111

Treasury Stock

The Company's Board of Directors authorizes repurchases of Common Stock from time to time. These authorizations give management discretion in determining the timing and conditions under which shares may be repurchased. This repurchase program does not have an expiration date.

The share repurchase activity pursuant to this authorization is as follows:

	Year Ended December 31,							Total From February 2008 Through December 31, 2017
	2017		2016		2015
Shares repurchased	5,436,803		7,034,420		6,640,601		(1)	39,779,019
Average purchase price per share	$	91.97	$	71.08	$	63.31		$	58.71
Amount spent on repurchased shares (in millions)	$	500	$	500	$	420		$	2,335
Aggregate Board of Directors repurchase authorizations during the period (in millions)(2)	$	1,500	$	—	$	1,000		$	3,866

______________________________

⁽¹⁾  The year ended December 31, 2015 excludes 9,264 shares withheld from an executive officer to cover statutory minimum withholding requirements for personal income taxes related to the vesting of restricted stock. Restricted stock awards are considered outstanding at the time of issuance. Accordingly, the shares withheld are treated as treasury shares.

⁽²⁾  These authorizations give management discretion in determining the timing and conditions under which shares may be repurchased. This repurchase program began in February 2008 and does not have an expiration date.

The purchase of treasury stock reduces the number of shares outstanding. The repurchased shares may be used by the Company for compensation programs utilizing the Company's stock and other corporate purposes. The Company accounts for treasury stock using the cost method and includes treasury stock as a component of stockholders' equity.

Other Comprehensive Income (Loss), Net

	Year Ended December 31,
	2017					2016					2015
	Gross Amount	Income Tax (Provision) Benefit		Net Amount		Gross Amount		Income Tax (Provision) Benefit	Net Amount		Gross Amount		Income Tax (Provision) Benefit		Net Amount
	(In $ millions)
Unrealized gain (loss) on marketable securities	—	(1	)	(1	)	—		—	—		—		—		—
Foreign currency translation	162	12		174		(22	)	11	(11	)	(193	)	5		(188	)
Gain (loss) on cash flow hedges	—	(1	)	(1	)	5		—	5		3		(1	)	2
Pension and postretirement benefits	7	2		9		(5	)	1	(4	)	4		(1	)	3
Total	169	12		181		(22	)	12	(10	)	(186	)	3		(183	)

112

Adjustments to Accumulated other comprehensive income (loss), net, are as follows:

	Unrealized Gain (Loss) on Marketable Securities (Note 6)		Foreign Currency Translation		Gain (Loss) from Cash Flow Hedges (Note 22)		Pension and Postretirement Benefits (Note 15)		Accumulated Other Comprehensive Income (Loss), Net
	(In $ millions)
As of December 31, 2014	1		(151	)	(4	)	(11	)	(165	)
Other comprehensive income (loss) before reclassifications	—		(193	)	(2	)	6		(189	)
Amounts reclassified from accumulated other comprehensive income (loss)	—		—		5		(2	)	3
Income tax (provision) benefit	—		5		(1	)	(1	)	3
As of December 31, 2015	1		(339	)	(2	)	(8	)	(348	)
Other comprehensive income (loss) before reclassifications	—		(22	)	7		(3	)	(18	)
Amounts reclassified from accumulated other comprehensive income (loss)	—		—		(2	)	(2	)	(4	)
Income tax (provision) benefit	—		11		—		1		12
As of December 31, 2016	1		(350	)	3		(12	)	(358	)
Other comprehensive income (loss) before reclassifications	—		162		4		8		174
Amounts reclassified from accumulated other comprehensive income (loss)	—		—		(4	)	(1	)	(5	)
Income tax (provision) benefit	(1	)	12		(1	)	2		12
As of December 31, 2017	—		(176	)	2		(3	)	(177	)

18. Other (Charges) Gains, Net

	Year Ended December 31,
	2017		2016		2015
	(In $ millions)
Employee termination benefits (Note 4)(1)	(4	)	(11	)	(53	)
InfraServ ownership change	(4	)	—		—
Asset impairments	—		(2	)	(126	)
Other plant/office closures	(52	)	—		—
Singapore contract termination	—		—		(174	)
Commercial disputes	—		2		2
Total	(60	)	(11	)	(351	)

______________________________

⁽¹⁾  Includes $1 million and $3 million of special termination benefits included in Benefit obligations in the consolidated balance sheet as of December 31, 2017 and 2016, respectively.

2017

During the year endedDecember 31, 2017, the Company recorded $4 million of employee termination benefits primarily related to the Company's ongoing efforts to align its businesses around its core value drivers.

113

A partner in the Company's InfraServ equity affiliate investments exercised an option right, which was disputed, to purchase additional ownership interests in the InfraServ entities from the Company. The purchase of these interests will reduce the Company's ownership interests in InfraServ GmbH & Co. Gendorf KG and InfraServ GmbH & Co. Knapsack KG from 39% and 27%, to 30% and 22%, respectively. Accordingly, during the year endedDecember 31, 2017, the Company reduced the carrying value of these investments by $4 million. In addition, the Company has reserved certain amounts for dividends received from the investments since the exercise notification was received. These InfraServ investments are primarily owned by entities included in the Other Activities segment. See Note 29 for further information.

During the year endedDecember 31, 2017, the Company provided notice of termination of a contract with a key raw materials supplier at its ethanol production unit in Nanjing, China. As a result, the Company recorded an estimated $51 million of plant/office closure costs primarily consisting of a $22 million contract termination charge and a $21 million reduction to its non-income tax receivable. The Nanjing, China ethanol production unit is included in the Company's Acetyl Intermediates segment.

2016

During the year ended December 31, 2016, the Company recorded $11 million of employee termination benefits primarily related to the Company's ongoing efforts to align its businesses around its core value drivers.

2015

During the year ended December 31, 2015, the Company recorded $21 million of employee termination benefits related to the Company's ongoing efforts to align its businesses around its core value drivers. In addition, the Company recorded $24 million of employee termination benefits related to a 50% capacity reduction at its Lanaken, Belgium acetate tow facility (Note 4).

In addition, during the year ended December 31, 2015, the Company recorded $6 million of employee termination benefits and $1 million of long-lived asset impairment losses related to the closure of its VAE emulsions facility in Tarragona, Spain (Note 4). In addition, the Company recorded $1 million of employee termination benefits and $1 million of long-lived asset impairment losses related to the closure of its VAE emulsions facility in Meredosia, Illinois (Note 4). The long-lived asset impairment losses related to both VAE facilities were measured at the dates of impairment to write-off the related property, plant and equipment at each facility (Note 2 and Note 4).

During the three months ended December 31, 2015, the Company determined its ethanol production unit at its acetyl facility in Nanjing, China should be assessed for impairment based on market conditions affecting demand for ethanol and downstream products, the cost to operate the unit and contractual obligations. As a result, the Company concluded that certain long-lived ethanol related assets were fully impaired. Accordingly, the Company recorded long-lived asset impairment losses, measured at the date of impairment (Note 2), of $123 million to fully write-off certain ethanol related assets. The Nanjing, China asset impairment is included in the Company's Acetyl Intermediates segment.

In December 2015, the Company made a payment terminating an existing agreement with a raw materials supplier in Singapore and recognized a $174 million charge, which reflects a discounted amount previously owed under that contract. This termination payment was determined not to have future economic benefit, and the contract's original terms substantially contributed to cumulative losses which resulted in a full impairment of the production assets in 2013. This charge is recorded in Other (charges) gains net, which is included in the Company's Acetyl Intermediates segment.

114

The changes in the restructuring reserves by business segment are as follows:

	Advanced Engineered Materials		Consumer Specialties		Industrial Specialties		Acetyl Intermediates		Other		Total
	(In $ millions)
Employee Termination Benefits
As of December 31, 2015	3		14		6		1		6		30
Additions	2		2		2		1		3		10
Cash payments	(3	)	(6	)	(6	)	(1	)	(5	)	(21	)
Other changes	(1	)	—		—		—		(1	)	(2	)
Exchange rate changes	—		(1	)	—		—		—		(1	)
As of December 31, 2016	1		9		2		1		3		16
Additions	1		2		—		—		1		4
Cash payments	(1	)	(3	)	(2	)	—		(2	)	(8	)
Other changes	—		(8	)	—		—		(1	)	(9	)
Exchange rate changes	—		—		—		—		—		—
As of December 31, 2017	1		—		—		1		1		3
Other Plant/Office Closures
As of December 31, 2015	—		—		—		—		—		—
Additions	—		—		—		—		—		—
Cash payments	—		—		—		—		—		—
Other changes	—		—		—		—		—		—
Exchange rate changes	—		—		—		—		—		—
As of December 31, 2016	—		—		—		—		—		—
Additions	—		—		—		29		—		29
Cash payments	—		—		—		(24	)	—		(24	)
Other changes	—		—		—		(3	)	—		(3	)
Exchange rate changes	—		—		—		—		—		—
As of December 31, 2017	—		—		—		2		—		2
Total	1		—		—		3		1		5

19. Income Taxes

On December 22, 2017, the Tax Cuts and Jobs Act (the "TCJA") was enacted and is effective January 1, 2018. ASC 740, Accounting for Income Taxes, requires companies to recognize the effects of tax law changes in the period of enactment. This overhaul of the US tax law made a number of substantial changes, including the reduction of the corporate tax rate from 35% to 21%, establishing a dividends received deduction for dividends paid by foreign subsidiaries to the US, elimination or limitation of certain deductions (interest, domestic production activities and executive compensation), imposing a mandatory tax on previously unrepatriated earnings accumulated offshore since 1986 and establishing global minimum income tax and base erosion tax provisions related to offshore activities and affiliated party payments.

The deemed repatriation of previously unremitted foreign earnings, of which the Company had approximately $3.0 billion as of December 31, 2017, will be taxed at 8% to the extent those earnings were reinvested in non-cash foreign assets, while previously unremitted earnings that have not been reinvested, computed based upon a two-year historical average of foreign cash and cash equivalents balances, will be taxed at 15.5%. The Company estimated its gross charge for the deemed repatriation of foreign earnings to be approximately $370 million. The deemed repatriation requires the recognition of both unrepatriated earnings, as well as various existing offshore foreign tax credits and attributes, resulting in an estimated net charge for the deemed repatriation of $197 million recorded in 2017. In addition to offshore foreign tax credits, existing foreign tax credit carryforwards in the US will be available to offset this tax charge. Due to the availability of foreign tax credit carryforwards, the Company does not expect a material cash impact from this repatriation provision and any remaining portion of the tax not covered by tax credits will be paid in installments over an eight year period.

115

The Company was also required to adjust the recorded amounts of its US deferred tax assets and liabilities resulting from the reduction in the US corporate tax rate and the impact of the dividends received deduction provisions on its deferred tax liabilities related to outside basis differences in certain joint venture investments. As a result of these changes, the Company recognized a tax benefit of approximately $107 million in 2017.

The global minimum income tax and base erosion provisions are effective for taxable years beginning after December 31, 2017. The Company does not currently expect these provisions to have a material impact on its tax rate. Based on initial guidance from the FASB, the Company has elected not to record deferred taxes related to future liabilities due to the minimum tax on global low taxed intangible income.

Due to the timing of the new tax law and the substantial changes it brings, the Staff of the Securities and Exchange Commission (the "SEC") issued Staff Accounting Bulletin No. 118 ("SAB 118"), which provides registrants a measurement period to report the impact of the new US tax law. During the measurement period, provisional amounts for the effects of the law are recorded to the extent a reasonable estimate can be made. To the extent that all information necessary is not available, prepared or analyzed, companies may recognize provisional estimated amounts for a period of up to one year following enactment of the TCJA.

The Company has recorded provisional amounts for several of the impacts of the new tax law including: the deemed repatriation tax on post-1986 accumulated earnings and profits, the deferred tax rate change effect of the new law, gross foreign tax credit carryforwards and related valuation allowances to offset foreign tax credit carryforwards. Certain items or estimates that result in impacts of the TCJA being provisional include: detailed foreign earnings calculations for the most recent period, projected foreign cash balances for certain foreign subsidiaries and finalized computations of foreign tax credit availability. In addition, the Company's 2017 US federal income tax return will not be finalized until later in 2018, and while historically this process has resulted in offsetting changes in estimates in current and deferred taxes for items which are timing related, the reduction of the US tax rate will result in adjustments to the Company's income tax (provision) benefit when recorded. Finally, the Company considers it likely that further technical guidance regarding certain of the new provisions included in the TCJA, as well as clarity regarding state income tax conformity to current federal tax code, may be issued.

Income Tax Provision

Earnings (loss) from continuing operations before tax by jurisdiction are as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
US	262	326	231
International	813	704	257
Total	1,075	1,030	488

The income tax provision (benefit) consists of the following:

	Year Ended December 31,
	2017		2016		2015
	(In $ millions)
Current
US	201		(22	)	28
International	158		60		152
Total	359		38		180
Deferred
US	(110	)	108		54
International	(36	)	(24	)	(33	)
Total	(146	)	84		21
Total	213		122		201

116

A reconciliation of the significant differences between the US federal statutory tax rate of 35% and the effective income tax rate on income from continuing operations is as follows:

	Year Ended December 31,
	2017		2016		2015
	(In $ millions, except percentages)
Income tax provision computed at US federal statutory tax rate	376		361		171
Change in valuation allowance	218		(18	)	124
Equity income and dividends	(87	)	(60	)	(33	)
(Income) expense not resulting in tax impact, net	(157	)	(152	)	(32	)
US tax effect of foreign earnings and dividends	521		302		15
Foreign tax credits	(759	)	(293	)	(4	)
Other foreign tax rate differentials	(38	)	(48	)	(47	)
Legislative changes	116		4		9
State income taxes, net of federal benefit	12		8		6
Other, net	11		18		(8	)
Income tax provision (benefit)	213		122		201
Effective income tax rate	20	%	12	%	41	%

As a result of the TCJA, US federal and state income taxes have been recorded on undistributed foreign earnings accumulated from 1986 through December 31, 2017. Based on the provisions of the law, the Company's previously taxed income for its foreign subsidiaries significantly exceeds its cash balances offshore. The Company has not recorded a deferred tax liability for foreign withholding or other foreign local tax that would be due when cash is repatriated to the US as such foreign earnings are considered permanently reinvested in the business or may be remitted substantially free of any additional local taxes. The determination of the amount of the unrecognized deferred tax liability related to the undistributed earnings is not practicable.

The higher effective tax rate for the year endedDecember 31, 2017 is primarily due to the impact of the TCJA (which is recorded in the Change in valuation allowance and Legislative changes lines, in the effective tax rate reconciliation above), increased losses in jurisdictions with no tax benefit and current year taxes related to internal restructuring for the Company's proposed acetate tow joint venture with Blackstone (Note 4) (which is recorded in the US tax effect of foreign earnings and dividends and the Foreign tax credits lines, above). The increases in losses without tax benefit primarily relate to $51 million of plant/office closure costs related to the Company's notice of termination of a contract with a key raw materials supplier at its ethanol production unit in Nanjing, China (Note 18), which is recorded in the Change in valuation allowance line above.

The lower effective tax rate for the year endedDecember 31, 2016 was primarily due to the settlement of uncertain tax positions and technical clarifications in Germany and the US of $55 million, which was recorded in the Other, net line above.

The higher effective rate for the year ended December 31, 2015 was due to increased losses in jurisdictions with no tax benefit. The increased losses primarily related to a $123 million long-lived asset impairment recorded to fully write-off certain ethanol related assets at the Company's acetyl facility in Nanjing, China and a $174 million charge related to the termination of a raw materials contract with a supplier in Singapore (Note 18), which was recorded in the Change in valuation allowance line above. These losses without tax benefit impacted 2015, but did not recur in 2016. The tax impact of these events was partially offset by decreases in uncertain tax positions of $29 million due to audit closures and technical jurisdictional clarifications, which was recorded in the Other, net line above.

During 2017, the Company undertook various internal reorganization transactions to separate certain assets to reorganize the holdings of its various foreign subsidiaries in preparation for contribution of those assets to its proposed acetate tow joint venture with Blackstone (Note 4). As a result, the Company generated additional net foreign tax credit carryforwards of approximately $240 million, the gross impacts of which are reflected in the Foreign tax credit line and the US tax effect of foreign earnings lines above in the effective tax rate reconciliation, that will be carried forward to future tax periods. These new credit carryforwards, as well as balances carried into 2017, were evaluated for realizability under the provisions of the TCJA. Due to the TCJA and uncertainty as to future sources of general limitation foreign source income to allow for utilization of these credits, the Company recorded a valuation allowance on these foreign tax credits in the amount of $164 million, which is recorded in the Change in valuation allowance line in the effective tax rate reconciliation.

117

Deferred Income Taxes

Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the consolidated deferred tax assets and liabilities are as follows:

	As of December 31,
	2017		2016
	(In $ millions)
Deferred Tax Assets
Pension and postretirement obligations(1)	143		313
Accrued expenses	50		61
Inventory	10		11
Net operating loss	703		661
Tax credit carryforwards(2)	478		136
Other	192		161
Subtotal	1,576		1,343
Valuation allowance(3)	(618	)	(386	)
Total	958		957
Deferred Tax Liabilities
Depreciation and amortization	307		366
Investments in affiliates	427		475
Other	69		87
Total	803		928
Net deferred tax assets (liabilities)	155		29

______________________________

⁽¹⁾  For the year ended December 31, 2017, the pension and postretirement obligations decreased primarily due to $316 million in employer contributions made to the US defined benefit plans (Note 15).

⁽²⁾  For the year ended December 31, 2017, the tax credit carryforwards increased primarily due to internal reorganization transactions made in preparation for the proposed acetate tow joint venture with Blackstone discussed herein and Note 4.

⁽³⁾  Includes deferred tax asset valuation allowances for the Company's deferred tax assets in the US, Luxembourg, Spain, China, Singapore, the United Kingdom, Canada and France. These valuation allowances relate primarily to net operating loss carryforward benefits and other net deferred tax assets, all of which may not be realizable. For the year ended December 31, 2017, the valuation allowance increased primarily due to the impact of the TCJA on excess foreign tax credits.

Net Operating Loss Carryforwards and Tax Credit Carryforwards

As of December 31, 2017, the Company has US federal net operating loss carryforwards of $35 million that are subject to limitation. These net operating loss carryforwards begin to expire in 2021. As of December 31, 2017, the Company also had state net operating loss carryforwards, net of federal tax impact, of $42 million, $38 million of which are offset by a valuation allowance due to uncertain recoverability. The Company also has foreign net operating loss carryforwards as of December 31, 2017 of $2.6 billion primarily for Luxembourg, Spain, Canada, China, Singapore and the United Kingdom, with various expiration dates. Net operating loss carryforwards of $473 million in China are set to expire beginning in 2018 through 2022. Net operating losses in most other foreign jurisdictions do not have an expiration date.

The Company's tax credit carryforwards primarily consist of $452 million of foreign tax credit carryforwards, which are partially offset by a valuation allowance of $164 million due to uncertain recoverability and $21 million of alternative minimum tax credit carryforwards in the US. The foreign tax credit carryforwards are subject to a ten-year carryforward period and will begin to expire in 2027 if not utilized prior to that time. The alternative minimum tax credits are subject to annual limitation due to prior ownership changes, but have an unlimited carryforward period and will be used to offset federal tax liability in future years.

118

Uncertain Tax Positions

Activity related to uncertain tax positions is as follows:

	Year Ended December 31,
	2017		2016		2015
	(In $ millions)
As of the beginning of the year	114		158		228
Increases in tax positions for the current year	14		9		13
Increases in tax positions for prior years(1)	4		11		76
Decreases in tax positions for prior years	(7	)	(9	)	(126	)
Decreases due to settlements	(6	)	(55	)	(33	)
As of the end of the year	119		114		158
Total uncertain tax positions that if recognized would impact the effective tax rate	100		87		144
Total amount of interest expense (benefit) and penalties recognized in the consolidated statements of operations(2)	6		(16	)	(12	)
Total amount of interest expense and penalties recognized in the consolidated balance sheets	38		26		43

______________________________

⁽¹⁾  Includes uncertain tax positions related to the Nilit acquisition (Note 4) of $4 million for the year ended December 31, 2017.

⁽²⁾  This amount reflects interest on uncertain tax positions and release of certain tax positions as a result of audit closure that was reflected in the consolidated statements of operations. In addition, for the years ended December 31, 2016 and 2015, the Company also paid an additional $1 million and $12 million, respectively, of previously accrued amounts due to settlements of tax examinations.

The Company primarily operates in the US, Germany, Belgium, Canada, China, Mexico and Singapore. Examinations are ongoing in a number of these jurisdictions. The Company's US tax returns for the years 2009 through 2015 are currently under audit by the US Internal Revenue Service. Outside of the US, the Company's German tax returns for the years 2008 through 2015 are under audit as well as certain of the Company's other subsidiaries within their respective jurisdictions.

The decrease in uncertain tax positions for the year ended December 31, 2016 is primarily due to audit closures and technical judicial clarifications. While it is reasonably possible that a further change in the unrecognized tax benefits may occur within the next twelve months related to the settlement of one or more of these audits, the Company is unable to estimate the amount of any such change.

In connection with the Company's US federal income tax audit for 2009 and 2010, the Company has received $192 million of proposed pre-tax adjustments related to various intercompany charges. In January 2018, the Company received proposed pre-tax adjustments for its 2011 and 2012 audit cycle in the amount of $198 million. In the event the Company is wholly unsuccessful in its defense and absent expected off-setting adjustments from foreign tax authorities, the proposed adjustments would result in the consumption of approximately $136 million of prior foreign tax credit carryforwards. The Company believes these proposed adjustments to be without merit and is vigorously defending its position.

20. Management Compensation Plans 

General Plan Description

The Company issues stock-based awards under its 2009 GIP, which enables the compensation committee of the Board of Directors to award incentive and nonqualified stock options, stock appreciation rights, shares of Common Stock, restricted stock awards, RSUs and incentive bonuses (which may be paid in cash or stock or a combination thereof), any of which may be performance-based, with vesting and other award provisions that provide effective incentive to Company employees (including officers), non-management directors and other service providers.

119

Total shares available for awards and total shares subject to outstanding awards are as follows:

	As of December 31, 2017
	Shares Available for Awards	Shares Subject to Outstanding Awards
2009 GIP	5,663,628	1,701,713

The Company realized income tax benefits from stock option exercises and RSU vestings as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Income tax benefit realized	9	7	2

Restricted Stock Units

A summary of changes in nonvested performance-based RSUs outstanding is as follows:

	Number of Units		Weighted Average Grant Date Fair Value
	(In thousands)		(In $)
As of December 31, 2016	1,085		53.36
Granted	314		83.52
Additional performance-based RSUs granted(1)	225		48.70
Vested	(527	)	49.36
Canceled	(150	)	53.21
Forfeited	(87	)	62.36
As of December 31, 2017	860		64.71

______________________________

⁽¹⁾  Represents additional performance-based RSU grants in 2014 that were awarded in 2017 as a result of achieving internal profitability targets.

The fair value of shares vested for performance-based RSUs is as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Total	42	64	27

A summary of changes in nonvested time-based RSUs outstanding is as follows:

	Number of Units		Weighted Average  Grant Date Fair Value
	(In thousands)		(In $)
As of December 31, 2016	344		67.42
Granted	159		86.20
Vested	(123	)	67.78
Forfeited	(29	)	68.29
As of December 31, 2017	351		75.75

120

The fair value of shares vested for time-based RSUs is as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Total	12	4	6

As of December 31, 2017, there was $52 million of unrecognized compensation cost related to RSUs, excluding actual forfeitures, which is expected to be recognized over a weighted average period of two years.

21. Leases

Future minimum lease payments under non-cancelable rental and lease agreements, which have initial or remaining terms in excess of one year are as follows:

	As of December 31, 2017
	Capital Leases
	(In $ millions)
2018	53
2019	46
2020	45
2021	44
2022	33
Later years	114
Sublease income	—
Minimum lease commitments	335
Less amounts representing interest	(127	)
Present value of net minimum lease obligations	208

	As of December 31, 2017
	Operating Leases
	(In $ millions)
2018	54
2019	47
2020	37
2021	28
2022	22
Later years	155
Sublease income	—
Minimum lease commitments	343

The Company expects that, in the normal course of business, leases that expire will be renewed or replaced by other leases.

Rent expense recorded under all operating leases is as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Total	159	154	154

121

22. Derivative Financial Instruments

Cash Flow Hedges

Cross-currency Swaps

In March 2015, the Company settled its cross-currency swap agreements with notional values of $250 million/€193 million, expiring on September 11, 2020, and $225 million/€162 million, expiring on April 17, 2019, in exchange for cash of $88 million. The Company classifies cash flows from derivative instruments designated as cash flow hedges in the same category of the consolidated statement of cash flows as the cash flows from the items being hedged. Accordingly, the settlement of the cross-currency swap agreements was included in Net cash provided by (used in) operating activities in the consolidated statement of cash flows for the year ended December 31, 2015.

Net Investment Hedges

The total notional amount of foreign currency denominated debt designated as a net investment hedge of net investments in foreign operations are as follows:

	As of December 31,
	2017	2016
	(In € millions)
Total	1,050	850

Foreign Currency Forwards and Swaps

Each of the contracts included in the table below will have approximately offsetting effects from actual underlying payables, receivables, intercompany loans or other assets or liabilities subject to foreign exchange remeasurement. The total US dollar equivalents of net foreign exchange exposure related to (short) long foreign exchange forward contracts outstanding by currency are as follows:

	2017 Maturity
	(In $ millions)
Currency
Brazilian real	(13	)
British pound sterling	(93	)
Canadian dollar	36
Euro	(6	)
Hungarian forint	10
Korean won	10
Singapore dollar	32
Swedish krona	(4	)
Total	(28	)

Gross notional values of the foreign currency forwards and swaps are as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Total	740	508

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Hedging activity for foreign currency forwards and commodity swaps is as follows:

	Year Ended December 31,			Statement of Operations Classification
	2017	2016	2015
	(In $ millions)
Hedging activities	4	2	2	Cost of sales
Ineffective portion of hedging activities	—	—	—	Other income (expense), net

Information regarding changes in the fair value of the Company's derivative and non-derivative instruments is as follows:

	Gain (Loss) Recognized in Other Comprehensive Income (Loss)				Gain (Loss) Recognized in Earnings (Loss)					Statement of Operations Classification
	Year Ended December 31,				Year Ended December 31,
	2017		2016	2015	2017		2016	2015
	(In $ millions)
Designated as Cash Flow Hedges
Commodity swaps	4		7	—	5		2	—		Cost of sales
Cross-currency swaps	—		—	—	—		—	46		Other income (expense), net or Foreign exchange gain (loss)
Foreign currency forwards	(1	)	—	—	(1	)	—	—		Cost of sales
Total	3		7	—	4		2	46
Designated as a Net Investment Hedge
Foreign currency denominated debt (Note 14)	(119	)	61	48	—		—	—		N/A
Foreign currency forwards	2		—	—	—		—	—		N/A
Total	(117	)	61	48	—		—	—
Not Designated as Hedges
Interest rate swaps	—		—	—	—		—	(1	)	Interest expense
Foreign currency forwards and swaps	—		—	—	2		14	(82	)	Foreign exchange gain (loss), net; Other income (expense), net
Total	—		—	—	2		14	(83	)

See Note 23 for additional information regarding the fair value of the Company's derivative instruments.

Certain of the Company's commodity swaps and foreign currency forwards and swaps permit the Company to net settle all contracts with the counterparty through a single payment in an agreed upon currency in the event of default or early termination of the contract, similar to a master netting arrangement.

123

Information regarding the gross amounts of the Company's derivative instruments and the amounts offset in the consolidated balance sheets is as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Derivative Assets
Gross amount recognized	13	14
Gross amount offset in the consolidated balance sheets	4	4
Net amount presented in the consolidated balance sheets	9	10
Gross amount not offset in the consolidated balance sheets	3	2
Net amount	6	8

	As of December 31,
	2017	2016
	(In $ millions)
Derivative Liabilities
Gross amount recognized	7	7
Gross amount offset in the consolidated balance sheets	4	4
Net amount presented in the consolidated balance sheets	3	3
Gross amount not offset in the consolidated balance sheets	3	2
Net amount	—	1

23. Fair Value Measurements

The Company's financial assets and liabilities are measured at fair value on a recurring basis (Note 2) as follows:

Derivatives. Derivative financial instruments include commodity swaps and foreign currency forwards and swaps and are valued in the market using discounted cash flow techniques. These techniques incorporate Level 1 and Level 2 fair value measurement inputs such as interest rates and foreign currency exchange rates. These market inputs are utilized in the discounted cash flow calculation considering the instrument's term, notional amount, discount rate and credit risk. Significant inputs to the derivative valuation for commodity swaps and foreign currency forwards and swaps are observable in the active markets and are classified as Level 2 in the fair value measurement hierarchy.

124

	Fair Value Measurement										Balance Sheet Classification
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)				Total
	As of December 31,
	2017	2016	2017		2016		2017		2016
	(In $ millions)
Derivatives Designated as Cash Flow Hedges
Commodity swaps	—	—	2		5		2		5		Current Other assets
Commodity swaps	—	—	2		—		2		—		Noncurrent Other assets
Derivatives Not Designated as Hedges
Foreign currency forwards and swaps	—	—	5		5		5		5		Current Other assets
Total assets	—	—	9		10		9		10
Derivatives Not Designated as Hedges
Foreign currency forwards and swaps	—	—	(3	)	(3	)	(3	)	(3	)	Current Other liabilities
Total liabilities	—	—	(3	)	(3	)	(3	)	(3	)

Carrying values and fair values of financial instruments that are not carried at fair value are as follows:

			Fair Value Measurement
	Carrying Amount		Significant Other Observable Inputs (Level 2)		Unobservable Inputs (Level 3)		Total
	As of December 31,
	2017	2016	2017	2016	2017	2016	2017	2016
	(In $ millions)
Cost investments	159	155	—	—	—	—	—	—
Insurance contracts in nonqualified trusts	42	49	42	49	—	—	42	49
Long-term debt, including current installments of long-term debt	3,398	2,938	3,299	2,826	208	217	3,507	3,043

In general, the cost investments included in the table above are not publicly traded and their fair values are not readily determinable; however, the Company believes the carrying values approximate or are less than the fair values. Insurance contracts in nonqualified trusts consist of long-term fixed income securities, which are valued using independent vendor pricing models with observable inputs in the active market and therefore represent a Level 2 fair value measurement. The fair value of long-term debt is based on valuations from third-party banks and market quotations and is classified as Level 2 in the fair value measurement hierarchy. The fair value of obligations under capital leases, which are included in long-term debt, is based on lease payments and discount rates, which are not observable in the market and therefore represents a Level 3 fair value measurement.

As of December 31, 2017 and 2016, the fair values of cash and cash equivalents, receivables, trade payables, short-term borrowings and the current installments of long-term debt approximate carrying values due to the short-term nature of these instruments. These items have been excluded from the table with the exception of the current installments of long-term debt.

125

24. Commitments and Contingencies

Commitments

Guarantees

The Company has agreed to guarantee or indemnify third parties for environmental and other liabilities pursuant to a variety of agreements, including asset and business divestiture agreements, leases, settlement agreements and various agreements with affiliated companies. Although many of these obligations contain monetary and/or time limitations, others do not provide such limitations.

As indemnification obligations often depend on the occurrence of unpredictable future events, the future costs associated with them cannot be determined at this time.

The Company has accrued for all probable and reasonably estimable losses associated with all known matters or claims. These known obligations include the following:

• Demerger Obligations

In connection with the Hoechst demerger, the Company agreed to indemnify Hoechst, and its legal successors, for various liabilities under the demerger agreement, including for environmental liabilities associated with contamination arising either from environmental damage in general ("Category A") or under 19 divestiture agreements entered into by Hoechst prior to the demerger ("Category B") (Note 16).

The Company's obligation to indemnify Hoechst, and its legal successors, is capped under Category B at €250 million. If and to the extent the environmental damage should exceed €750 million in aggregate, the Company's obligation to indemnify Hoechst and its legal successors applies, but is then limited to 33.33% of the remediation cost without further limitations. Cumulative payments under the divestiture agreements as of December 31, 2017 are $80 million. Most of the divestiture agreements have become time barred and/or any notified environmental damage claims have been partially settled.

The Company has also undertaken in the demerger agreement to indemnify Hoechst and its legal successors for (i) 33.33% of any and all Category A liabilities that result from Hoechst being held as the responsible party pursuant to public law or current or future environmental law or by third parties pursuant to private or public law related to contamination and (ii) liabilities that Hoechst is required to discharge, including tax liabilities, which are associated with businesses that were included in the demerger but were not demerged due to legal restrictions on the transfers of such items. These indemnities do not provide for any monetary or time limitations. The Company has not been requested by Hoechst to make any payments in connection with this indemnification. Accordingly, the Company has not made any payments to Hoechst and its legal successors.

Based on the Company's evaluation of currently available information, including the lack of requests for indemnification, the Company cannot estimate the Possible Loss for the remaining demerger obligations, if any, in excess of amounts accrued.

• Divestiture Obligations

The Company and its predecessor companies agreed to indemnify third-party purchasers of former businesses and assets for various pre-closing conditions, as well as for breaches of representations, warranties and covenants. Such liabilities also include environmental liability, product liability, antitrust and other liabilities. These indemnifications and guarantees represent standard contractual terms associated with typical divestiture agreements and, other than environmental liabilities, the Company does not believe that they expose the Company to any significant risk (Note 16).

The Company has divested numerous businesses, investments and facilities through agreements containing indemnifications or guarantees to the purchasers. Many of the obligations contain monetary and/or time limitations, which extend through 2037. The aggregate amount of outstanding indemnifications and guarantees provided for under these agreements is $122 million as of December 31, 2017. Other agreements do not provide for any monetary or time limitations.

Based on the Company's evaluation of currently available information, including the number of requests for indemnification or other payment received by the Company, the Company cannot estimate the Possible Loss for the remaining divestiture obligations, if any, in excess of amounts accrued.

126

Purchase Obligations

In the normal course of business, the Company enters into various purchase commitments for goods and services. The Company maintains a number of "take-or-pay" contracts for purchases of raw materials, utilities and other services. Certain of the contracts contain a contract termination buy-out provision that allows for the Company to exit the contracts for amounts less than the remaining take-or-pay obligations. Additionally, the Company has other outstanding commitments representing maintenance and service agreements, energy and utility agreements, consulting contracts and software agreements. As of December 31, 2017, the Company had unconditional purchase obligations of $1.8 billion, which extend through 2036.

Contingencies

The Company is involved in legal and regulatory proceedings, lawsuits, claims and investigations incidental to the normal conduct of business, relating to such matters as product liability, land disputes, contracts, employment, antitrust or competition compliance, intellectual property, personal injury and other actions in tort, workers' compensation, chemical exposure, asbestos exposure, taxes, trade compliance, acquisitions and divestitures, claims of legacy stockholders, past waste disposal practices and release of chemicals into the environment. The Company is actively defending those matters where the Company is named as a defendant and, based on the current facts, does not believe the outcomes from these matters would be material to the Company's results of operations, cash flows or financial position.

European Commission

In May 2017, the Company learned that the European Commission has opened a competition law investigation involving certain subsidiaries of the Company with respect to certain ethylene purchases. The Company is cooperating with the European Commission. Because the investigation is on-going and the many uncertainties and variables involved, the Company is unable at this time to determine the outcome of this investigation and whether, and in what amount, any potential fines would be assessed.

25. Supplemental Cash Flow Information 

	Year Ended December 31,
	2017		2016	2015
	(In $ millions)
Interest paid, net of amounts capitalized	130		130	120
Taxes paid, net of refunds	123		129	151
Noncash Investing and Financing Activities
Accrued capital expenditures	14		1	(37	)
Asset retirement obligations	2		2	3
Capital lease obligations	—		—	6
Fair value adjustment to securities available for sale, net of tax	(1	)	—	—
Distribution to noncontrolling interests (Note 5)	—		—	(4	)

26. Segment Information

Business Segments

The Company operates through business segments according to the nature and economic characteristics of its products and customer relationships, as well as the manner in which the information is used internally by the Company's key decision maker, who is the Company's Chief Executive Officer.

127

The Company's business segments are as follows:

• Advanced Engineered Materials

The Company's Advanced Engineered Materials segment includes the engineered materials business and certain strategic affiliates. The engineered materials business develops, produces and supplies a broad portfolio of high performance specialty polymers for automotive and medical applications, as well as industrial products and consumer electronics. Together with its strategic affiliates, the Company's engineered materials business is a leading participant in the global specialty polymers industry. The primary products of Advanced Engineered Materials are used in a broad range of end-use products including fuel system components, automotive safety systems, medical applications, electronics, appliances, industrial products, battery separators, conveyor belts, filtration equipment, coatings, and electrical applications and products.

• Consumer Specialties

The Company's Consumer Specialties segment includes the cellulose derivatives and food ingredients businesses, which serve consumer-driven applications. These operating segments are aggregated by the Company into one reportable segment based on similar economic characteristics and similar production processes, classes of customers and selling and distribution practices. The Company's cellulose derivatives business is a leading global producer and supplier of acetate tow and acetate flake, primarily used in filter products applications. The Company's food ingredients business is a leading global supplier of acesulfame potassium for the food and beverage industry and is a leading producer of food protection ingredients, such as potassium sorbate and sorbic acid. The Company's food ingredients business produces and sells Sunett^® high intensity sweeteners.

• Industrial Specialties

The Company's Industrial Specialties segment includes the emulsion polymers and EVA polymers businesses, which are operating segments aggregated by the Company into one reportable segment based on similar products, production processes, classes of customers and selling and distribution practices as well as economic similarities over a normal business cycle. The Company's emulsion polymers business is a leading global producer of vinyl acetate-based emulsions and develops products and application technologies to improve performance, create value and drive innovation in applications such as paints and coatings, adhesives, construction, glass fiber, textiles and paper. The Company's EVA polymers business is a leading North American manufacturer of a full range of specialty ethylene vinyl acetate resins and compounds, as well as select grades of low-density polyethylene. The Company's EVA polymers' products are used in many applications, including flexible packaging films, lamination film products, hot melt adhesives, automotive parts and carpeting.

• Acetyl Intermediates

The Company's Acetyl Intermediates segment includes the intermediate chemistry business, which produces and supplies acetyl products, including acetic acid, vinyl acetate monomer, acetic anhydride and acetate esters. These products are generally used as starting materials for colorants, paints, adhesives, coatings and pharmaceuticals. The Acetyl Intermediates segment also produces organic solvents and intermediates for pharmaceutical, agricultural and chemical products.

• Other Activities

Other Activities primarily consists of corporate center costs, including administrative activities such as finance, information technology and human resource functions, interest income and expense associated with financing activities and results of the Company's captive insurance companies. Other Activities also includes the components of net periodic benefit cost (interest cost, expected return on assets and net actuarial gains and losses) for the Company's defined benefit pension plans and other postretirement plans not allocated to the Company's business segments.

The business segment management reporting and controlling systems are based on the same accounting policies as those described in the summary of significant accounting policies (Note 2).

128

Sales transactions between business segments are generally recorded at values that approximate third-party selling prices.

	Advanced Engineered Materials		Consumer Specialties			Industrial Specialties			Acetyl Intermediates			Other Activities		Eliminations		Consolidated
	(In $ millions)
	Year Ended December 31, 2017
Net sales	2,096		785		(1)	1,023		(2)	2,669		(3)	—		(433	)	6,140
Other (charges) gains, net (Note 18)	(2	)	(2	)		—			(52	)		(4	)	—		(60	)
Operating profit (loss)	383		218			87			424			(211	)	—		901
Equity in net earnings (loss) of affiliates	168		3			—			6			6		—		183
Depreciation and amortization	108		44			38			105			10		—		305
Capital expenditures	75		42			30			120			14		—		281		(4)
	As of December 31, 2017
Goodwill and intangible assets, net	798		258			46			202			—		—		1,304
Total assets	3,672		1,357			861			2,657			991		—		9,538
	Year Ended December 31, 2016
Net sales	1,444		929		(1)	979		(2)	2,441		(3)	—		(404	)	5,389
Other (charges) gains, net (Note 18)	(2	)	(2	)		(3	)		(3	)		(1	)	—		(11	)
Operating profit (loss)	350		302			105			340			(205	)	1		893
Equity in net earnings (loss) of affiliates	122		3			—			6			24		—		155
Depreciation and amortization	92		45			34			107			12		—		290
Capital expenditures	73		38			57			67			12		—		247		(4)
	As of December 31, 2016
Goodwill and intangible assets, net	517		244			46			183			—		—		990
Total assets	2,792		1,324			758			2,440			1,043		—		8,357
	Year Ended December 31, 2015
Net sales	1,326		969		(1)	1,082		(2)	2,744		(3)	—		(447	)	5,674
Other (charges) gains, net (Note 18)	(7	)	(25	)		(10	)		(300	)		(9	)	—		(351	)
Operating profit (loss)	235		262			72			(3	)		(240	)	—		326
Equity in net earnings (loss) of affiliates	150		2			—			6			23		—		181
Depreciation and amortization	99		60			64			123			11		—		357
Capital expenditures	73		65			56			282			7		—		483		(4)

______________________________

⁽¹⁾  Includes intersegment sales of $2 million, $0 million and $0 million for the year ended December 31, 2017, 2016 and 2015, respectively.

⁽²⁾  Includes intersegment sales of $4 million, $3 million and $0 million for the years ended December 31, 2017, 2016 and 2015, respectively.

⁽³⁾  Includes intersegment sales of $427 million, $401 million and $447 million for the years ended December 31, 2017, 2016 and 2015, respectively.

⁽⁴⁾  Includes an increase in accrued capital expenditures of $14 million, an increase of $1 million and a decrease of $37 million for the years ended December 31, 2017, 2016 and 2015, respectively.

129

Geographical Area Information

The net sales based on the geographic location of the Company's facilities are as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Belgium	295	408	417
Canada	92	123	162
China	833	745	800
Germany	1,776	1,540	1,779
Italy	259	13	—
Mexico	257	214	204
Singapore	867	758	703
US	1,572	1,451	1,463
Other	189	137	146
Total	6,140	5,389	5,674

Property, plant and equipment, net based on the geographic location of the Company's facilities is as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Belgium	57	55
Canada	128	132
China	363	359
Germany	979	868
Italy	51	45
Mexico	162	159
Singapore	87	90
US	1,857	1,798
Other	78	71
Total	3,762	3,577

27. Earnings (Loss) Per Share

	Year Ended December 31,
	2017		2016		2015
	(In $ millions, except share data)
Amounts attributable to Celanese Corporation
Earnings (loss) from continuing operations	856		902		306
Earnings (loss) from discontinued operations	(13	)	(2	)	(2	)
Net earnings (loss)	843		900		304
Weighted average shares - basic	137,902,667		144,939,433		150,838,050
Incremental shares attributable to equity awards(1)	414,728		728,748		1,449,905
Weighted average shares - diluted	138,317,395		145,668,181		152,287,955

______________________________

⁽¹⁾  Excludes 29, 836 and 2,903 equity award shares for the years ended December 31, 2017, 2016 and 2015, respectively, as their effect would have been antidilutive.

130

28. Consolidating Guarantor Financial Information

The Senior Notes were issued by Celanese US ("Issuer") and are guaranteed by Celanese Corporation ("Parent Guarantor") and the Subsidiary Guarantors (Note 14). The Issuer and Subsidiary Guarantors are 100% owned subsidiaries of the Parent Guarantor. The Parent Guarantor and Subsidiary Guarantors have guaranteed the Notes fully and unconditionally and jointly and severally.

For cash management purposes, the Company transfers cash between the Parent Guarantor, Issuer, Subsidiary Guarantors and non-guarantors through intercompany financing arrangements, contributions or declaration of dividends between the respective parent and its subsidiaries. The transfer of cash under these activities facilitates the ability of the recipient to make specified third-party payments for principal and interest on the Company's outstanding debt, Common Stock dividends and Common Stock repurchases. The consolidating statements of cash flow present such intercompany financing activities, contributions and dividends consistent with how such activity would be presented in a stand-alone statement of cash flows.

The Company has not presented separate financial information and other disclosures for each of its Subsidiary Guarantors because it believes such financial information and other disclosures would not provide investors with any additional information that would be material in evaluating the sufficiency of the guarantees.

For the year ended December 31, 2015, $54 million in interest expense was allocated from the Issuer to Subsidiary Guarantors.

The consolidating financial information for the Parent Guarantor, the Issuer, the Subsidiary Guarantors and the non-guarantors are as follows:

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CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF OPERATIONS

	Year Ended December 31, 2017
	Parent Guarantor	Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net sales	—	—		2,240		5,013		(1,113	)	6,140
Cost of sales	—	—		(1,717	)	(4,016	)	1,108		(4,625	)
Gross profit	—	—		523		997		(5	)	1,515
Selling, general and administrative expenses	—	—		(135	)	(321	)	—		(456	)
Amortization of intangible assets	—	—		(4	)	(16	)	—		(20	)
Research and development expenses	—	—		(31	)	(41	)	—		(72	)
Other (charges) gains, net	—	—		(7	)	(53	)	—		(60	)
Foreign exchange gain (loss), net	—	—		—		(1	)	—		(1	)
Gain (loss) on disposition of businesses and assets, net	—	—		(8	)	3		—		(5	)
Operating profit (loss)	—	—		338		568		(5	)	901
Equity in net earnings (loss) of affiliates	843	867		591		166		(2,284	)	183
Interest expense	—	(20	)	(104	)	(30	)	32		(122	)
Refinancing expense	—	—		—		—		—		—
Interest income	—	25		4		5		(32	)	2
Dividend income - cost investments	—	—		—		111		(3	)	108
Other income (expense), net	—	(3	)	2		4		—		3
Earnings (loss) from continuing operations before tax	843	869		831		824		(2,292	)	1,075
Income tax (provision) benefit	—	(26	)	(62	)	(125	)	—		(213	)
Earnings (loss) from continuing operations	843	843		769		699		(2,292	)	862
Earnings (loss) from operation of discontinued operations	—	—		(2	)	(14	)	—		(16	)
Gain (loss) on disposition of discontinued operations	—	—		—		—		—		—
Income tax (provision) benefit from discontinued operations	—	—		1		2		—		3
Earnings (loss) from discontinued operations	—	—		(1	)	(12	)	—		(13	)
Net earnings (loss)	843	843		768		687		(2,292	)	849
Net (earnings) loss attributable to noncontrolling interests	—	—		—		(6	)	—		(6	)
Net earnings (loss) attributable to Celanese Corporation	843	843		768		681		(2,292	)	843

132

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF OPERATIONS

	Year Ended December 31, 2016
	Parent Guarantor	Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net sales	—	—		2,162		4,322		(1,095	)	5,389
Cost of sales	—	—		(1,657	)	(3,428	)	1,101		(3,984	)
Gross profit	—	—		505		894		6		1,405
Selling, general and administrative expenses	—	—		(112	)	(304	)	—		(416	)
Amortization of intangible assets	—	—		(5	)	(4	)	—		(9	)
Research and development expenses	—	—		(32	)	(46	)	—		(78	)
Other (charges) gains, net	—	—		—		(11	)	—		(11	)
Foreign exchange gain (loss), net	—	—		—		(1	)	—		(1	)
Gain (loss) on disposition of businesses and assets, net	—	—		(8	)	17		(6	)	3
Operating profit (loss)	—	—		348		545		—		893
Equity in net earnings (loss) of affiliates	898	939		653		146		(2,481	)	155
Interest expense	—	(16	)	(94	)	(29	)	19		(120	)
Refinancing expense	—	(4	)	(2	)	—		—		(6	)
Interest income	—	12		4		5		(19	)	2
Dividend income - cost investments	—	—		—		107		1		108
Other income (expense), net	—	(1	)	1		(2	)	—		(2	)
Earnings (loss) from continuing operations before tax	898	930		910		772		(2,480	)	1,030
Income tax (provision) benefit	2	(32	)	(53	)	(36	)	(3	)	(122	)
Earnings (loss) from continuing operations	900	898		857		736		(2,483	)	908
Earnings (loss) from operation of discontinued operations	—	—		(2	)	(1	)	—		(3	)
Gain (loss) on disposition of discontinued operations	—	—		—		—		—		—
Income tax (provision) benefit from discontinued operations	—	—		—		1		—		1
Earnings (loss) from discontinued operations	—	—		(2	)	—		—		(2	)
Net earnings (loss)	900	898		855		736		(2,483	)	906
Net (earnings) loss attributable to noncontrolling interests	—	—		—		(6	)	—		(6	)
Net earnings (loss) attributable to Celanese Corporation	900	898		855		730		(2,483	)	900

133

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF OPERATIONS

	Year Ended December 31, 2015
	Parent Guarantor	Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net sales	—	—		2,410		4,485		(1,221	)	5,674
Cost of sales	—	—		(1,729	)	(3,897	)	1,270		(4,356	)
Gross profit	—	—		681		588		49		1,318
Selling, general and administrative expenses	—	—		(242	)	(264	)	—		(506	)
Amortization of intangible assets	—	—		(5	)	(6	)	—		(11	)
Research and development expenses	—	—		(78	)	(41	)	—		(119	)
Other (charges) gains, net	—	—		(5	)	(346	)	—		(351	)
Foreign exchange gain (loss), net	—	—		—		4		—		4
Gain (loss) on disposition of businesses and assets, net	—	—		(6	)	(3	)	—		(9	)
Operating profit (loss)	—	—		345		(68	)	49		326
Equity in net earnings (loss) of affiliates	302	314		84		162		(681	)	181
Interest expense	—	(77	)	(76	)	(36	)	70		(119	)
Refinancing expense	—	—		—		—		—		—
Interest income	—	18		40		13		(70	)	1
Dividend income - cost investments	—	—		—		107		—		107
Other income (expense), net	—	(2	)	2		(8	)	—		(8	)
Earnings (loss) from continuing operations before tax	302	253		395		170		(632	)	488
Income tax (provision) benefit	2	49		(133	)	(98	)	(21	)	(201	)
Earnings (loss) from continuing operations	304	302		262		72		(653	)	287
Earnings (loss) from operation of discontinued operations	—	—		(3	)	—		—		(3	)
Gain (loss) on disposition of discontinued operations	—	—		—		—		—		—
Income tax (provision) benefit from discontinued operations	—	—		1		—		—		1
Earnings (loss) from discontinued operations	—	—		(2	)	—		—		(2	)
Net earnings (loss)	304	302		260		72		(653	)	285
Net (earnings) loss attributable to noncontrolling interests	—	—		—		19		—		19
Net earnings (loss) attributable to Celanese Corporation	304	302		260		91		(653	)	304

134

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME (LOSS)

	Year Ended December 31, 2017
	Parent Guarantor		Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net earnings (loss)	843		843		768		687		(2,292	)	849
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	(1	)	(1	)	(1	)	(1	)	3		(1	)
Foreign currency translation	174		174		226		268		(668	)	174
Gain (loss) from cash flow hedges	(1	)	(1	)	(1	)	(1	)	3		(1	)
Pension and postretirement benefits	9		9		7		10		(26	)	9
Total other comprehensive income (loss), net of tax	181		181		231		276		(688	)	181
Total comprehensive income (loss), net of tax	1,024		1,024		999		963		(2,980	)	1,030
Comprehensive (income) loss attributable to noncontrolling interests	—		—		—		(6	)	—		(6	)
Comprehensive income (loss) attributable to Celanese Corporation	1,024		1,024		999		957		(2,980	)	1,024

135

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME (LOSS)

	Year Ended December 31, 2016
	Parent Guarantor		Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net earnings (loss)	900		898		855		736		(2,483	)	906
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	—		—		—		—		—		—
Foreign currency translation	(11	)	(11	)	(65	)	(73	)	149		(11	)
Gain (loss) from cash flow hedges	5		5		5		5		(15	)	5
Pension and postretirement benefits	(4	)	(4	)	(4	)	(2	)	10		(4	)
Total other comprehensive income (loss), net of tax	(10	)	(10	)	(64	)	(70	)	144		(10	)
Total comprehensive income (loss), net of tax	890		888		791		666		(2,339	)	896
Comprehensive (income) loss attributable to noncontrolling interests	—		—		—		(6	)	—		(6	)
Comprehensive income (loss) attributable to Celanese Corporation	890		888		791		660		(2,339	)	890

136

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME (LOSS)

	Year Ended December 31, 2015
	Parent Guarantor		Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net earnings (loss)	304		302		260		72		(653	)	285
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	—		—		—		—		—		—
Foreign currency translation	(188	)	(188	)	(181	)	(231	)	600		(188	)
Gain (loss) from cash flow hedges	2		2		5		1		(8	)	2
Pension and postretirement benefits	3		3		3		2		(8	)	3
Total other comprehensive income (loss), net of tax	(183	)	(183	)	(173	)	(228	)	584		(183	)
Total comprehensive income (loss), net of tax	121		119		87		(156	)	(69	)	102
Comprehensive (income) loss attributable to noncontrolling interests	—		—		—		19		—		19
Comprehensive income (loss) attributable to Celanese Corporation	121		119		87		(137	)	(69	)	121

137

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING BALANCE SHEET

	As of December 31, 2017
	Parent Guarantor	Issuer	Subsidiary Guarantors	Non- Guarantors	Eliminations		Consolidated
	(In $ millions)
ASSETS
Current Assets
Cash and cash equivalents	—	—	230	346	—		576
Trade receivables - third party and affiliates	—	—	89	988	(91	)	986
Non-trade receivables, net	38	482	279	385	(940	)	244
Inventories, net	—	—	277	672	(49	)	900
Marketable securities, at fair value	—	—	32	—	—		32
Other assets	—	60	12	93	(111	)	54
Total current assets	38	542	919	2,484	(1,191	)	2,792
Investments in affiliates	2,850	4,283	3,916	861	(10,934	)	976
Property, plant and equipment, net	—	—	1,145	2,617	—		3,762
Deferred income taxes	—	6	206	158	(4	)	366
Other assets	—	1,295	171	165	(1,293	)	338
Goodwill	—	—	314	689	—		1,003
Intangible assets, net	—	—	48	253	—		301
Total assets	2,888	6,126	6,719	7,227	(13,422	)	9,538
LIABILITIES AND EQUITY
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	—	76	148	369	(267	)	326
Trade payables - third party and affiliates	—	1	300	598	(92	)	807
Other liabilities	—	71	302	273	(292	)	354
Deferred income taxes	—	—	—	—	—		—
Income taxes payable	—	—	471	92	(491	)	72
Total current liabilities	—	148	1,221	1,332	(1,142	)	1,559
Noncurrent Liabilities
Long-term debt, net of unamortized deferred financing costs	—	3,128	1,254	233	(1,300	)	3,315
Deferred income taxes	—	—	—	215	(4	)	211
Uncertain tax positions	—	—	1	157	(2	)	156
Benefit obligations	—	—	277	308	—		585
Other liabilities	—	—	255	158	—		413
Total noncurrent liabilities	—	3,128	1,787	1,071	(1,306	)	4,680
Total Celanese Corporation stockholders' equity	2,888	2,850	3,711	4,412	(10,974	)	2,887
Noncontrolling interests	—	—	—	412	—		412
Total equity	2,888	2,850	3,711	4,824	(10,974	)	3,299
Total liabilities and equity	2,888	6,126	6,719	7,227	(13,422	)	9,538

138

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING BALANCE SHEET

	As of December 31, 2016
	Parent Guarantor	Issuer	Subsidiary Guarantors	Non- Guarantors	Eliminations		Consolidated
	(In $ millions)
ASSETS
Current Assets
Cash and cash equivalents	—	—	51	587	—		638
Trade receivables - third party and affiliates	—	—	107	819	(125	)	801
Non-trade receivables, net	40	499	249	308	(873	)	223
Inventories, net	—	—	239	526	(45	)	720
Marketable securities, at fair value	—	—	30	—	—		30
Other assets	—	42	25	76	(83	)	60
Total current assets	40	541	701	2,316	(1,126	)	2,472
Investments in affiliates	2,548	4,029	3,655	752	(10,132	)	852
Property, plant and equipment, net	—	—	1,049	2,528	—		3,577
Deferred income taxes	—	—	91	86	(18	)	159
Other assets	—	705	133	156	(687	)	307
Goodwill	—	—	314	482	—		796
Intangible assets, net	—	—	48	146	—		194
Total assets	2,588	5,275	5,991	6,466	(11,963	)	8,357
LIABILITIES AND EQUITY
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	—	6	133	250	(271	)	118
Trade payables - third party and affiliates	—	—	226	524	(125	)	625
Other liabilities	—	58	167	262	(165	)	322
Deferred income taxes	—	—	—	—	—		—
Income taxes payable	—	—	454	75	(517	)	12
Total current liabilities	—	64	980	1,111	(1,078	)	1,077
Noncurrent Liabilities
Long-term debt, net of unamortized deferred financing costs	—	2,647	727	210	(694	)	2,890
Deferred income taxes	—	16	—	132	(18	)	130
Uncertain tax positions	—	—	3	130	(2	)	131
Benefit obligations	—	—	636	257	—		893
Other liabilities	—	—	74	142	(1	)	215
Total noncurrent liabilities	—	2,663	1,440	871	(715	)	4,259
Total Celanese Corporation stockholders' equity	2,588	2,548	3,571	4,051	(10,170	)	2,588
Noncontrolling interests	—	—	—	433	—		433
Total equity	2,588	2,548	3,571	4,484	(10,170	)	3,021
Total liabilities and equity	2,588	5,275	5,991	6,466	(11,963	)	8,357

139

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF CASH FLOWS

	Year Ended December 31, 2017
	Parent Guarantor		Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net cash provided by (used in) operating activities	740		868		425		593		(1,823	)	803
Investing Activities
Capital expenditures on property, plant and equipment	—		—		(176	)	(91	)	—		(267	)
Acquisitions, net of cash acquired	—		(11	)	(12	)	(274	)	28		(269	)
Proceeds from sale of businesses and assets, net	—		—		9		20		(28	)	1
Capital expenditures related to Fairway Methanol LLC	—		—		—		—		—		—
Return of capital from subsidiary	—		16		241		—		(257	)	—
Contributions to subsidiary	—		—		—		—		—		—
Intercompany loan receipts (disbursements)	—		(530	)	(25	)	—		555		—
Other, net	—		—		(2	)	(12	)	—		(14	)
Net cash provided by (used in) investing activities	—		(525	)	35		(357	)	298		(549	)
Financing Activities
Short-term borrowings (repayments), net	—		56		15		51		(11	)	111
Proceeds from short-term borrowings	—		—		—		182		—		182
Repayments of short-term borrowings	—		—		—		(124	)	—		(124	)
Proceeds from long-term debt	—		351		530		14		(544	)	351
Repayments of long-term debt	—		(6	)	(2	)	(69	)	—		(77	)
Purchases of treasury stock, including related fees	(500	)	—		—		—		—		(500	)
Dividends to parent	—		(741	)	(802	)	(280	)	1,823		—
Contributions from parent	—		—		—		—		—		—
Stock option exercises	1		—		—		—		—		1
Series A common stock dividends	(241	)	—		—		—		—		(241	)
Return of capital to parent	—		—		—		(257	)	257		—
(Distributions to) contributions from noncontrolling interests	—		—		—		(27	)	—		(27	)
Other, net	—		(3	)	(22	)	(2	)	—		(27	)
Net cash provided by (used in) financing activities	(740	)	(343	)	(281	)	(512	)	1,525		(351	)
Exchange rate effects on cash and cash equivalents	—		—		—		35		—		35
Net increase (decrease) in cash and cash equivalents	—		—		179		(241	)	—		(62	)
Cash and cash equivalents as of beginning of period	—		—		51		587		—		638
Cash and cash equivalents as of end of period	—		—		230		346		—		576

140

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF CASH FLOWS

	Year Ended December 31, 2016
	Parent Guarantor		Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net cash provided by (used in) operating activities	695		711		(21	)	872		(1,364	)	893
Investing Activities
Capital expenditures on property, plant and equipment	—		—		(139	)	(107	)	—		(246	)
Acquisitions, net of cash acquired	—		—		—		(178	)	—		(178	)
Proceeds from sale of businesses and assets, net	—		—		1		11		—		12
Capital expenditures related to Fairway Methanol LLC	—		—		—		—		—		—
Return of capital from subsidiary	—		145		758		—		(903	)	—
Contributions to subsidiary	—		—		—		—		—		—
Intercompany loan receipts (disbursements)	—		(283	)	19		90		174		—
Other, net	—		—		(10	)	(17	)	—		(27	)
Net cash provided by (used in) investing activities	—		(138	)	629		(201	)	(729	)	(439	)
Financing Activities
Short-term borrowings (repayments), net	—		(371	)	1		(1	)	19		(352	)
Proceeds from short-term borrowings	—		—		—		53		—		53
Repayments of short-term borrowings	—		—		—		(90	)	—		(90	)
Proceeds from long-term debt	—		1,589		746		—		(826	)	1,509
Repayments of long-term debt	—		(1,083	)	(635	)	(42	)	633		(1,127	)
Purchases of treasury stock, including related fees	(500	)	—		—		—		—		(500	)
Dividends to parent	—		(695	)	(669	)	—		1,364		—
Contributions from parent	—		—		—		—		—		—
Stock option exercises	6		—		—		—		—		6
Series A common stock dividends	(201	)	—		—		—		—		(201	)
Return of capital to parent	—		—		—		(903	)	903		—
(Distributions to) contributions from noncontrolling interests	—		—		—		(24	)	—		(24	)
Other, net	—		(13	)	(21	)	1		—		(33	)
Net cash provided by (used in) financing activities	(695	)	(573	)	(578	)	(1,006	)	2,093		(759	)
Exchange rate effects on cash and cash equivalents	—		—		—		(24	)	—		(24	)
Net increase (decrease) in cash and cash equivalents	—		—		30		(359	)	—		(329	)
Cash and cash equivalents as of beginning of period	—		—		21		946		—		967
Cash and cash equivalents as of end of period	—		—		51		587		—		638

141

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF CASH FLOWS

	Year Ended December 31, 2015
	Parent Guarantor		Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net cash provided by (used in) operating activities	591		536		529		422		(1,216	)	862
Investing Activities
Capital expenditures on property, plant and equipment	—		—		(128	)	(104	)	—		(232	)
Acquisitions, net of cash acquired	—		—		(3	)	(3	)	—		(6	)
Proceeds from sale of businesses and assets, net	—		—		—		4		—		4
Capital expenditures related to Fairway Methanol LLC	—		—		(20	)	(268	)	—		(288	)
Return of capital from subsidiary	—		—		—		—		—		—
Contributions to subsidiary	—		—		(120	)	—		120		—
Intercompany loan receipts (disbursements)	—		(333	)	(33	)	(15	)	381		—
Other, net	—		—		(12	)	(24	)	—		(36	)
Net cash provided by (used in) investing activities	—		(333	)	(316	)	(410	)	501		(558	)
Financing Activities
Short-term borrowings (repayments), net	—		383		—		—		(33	)	350
Proceeds from short-term borrowings	—		—		—		80		—		80
Repayments of short-term borrowings	—		—		—		(83	)	—		(83	)
Proceeds from long-term debt	—		15		406		—		(421	)	—
Repayments of long-term debt	—		(9	)	(74	)	(14	)	73		(24	)
Purchases of treasury stock, including related fees	(420	)	—		—		—		—		(420	)
Dividends to parent	—		(592	)	(624	)	—		1,216		—
Contributions from parent	—		—		—		120		(120	)	—
Stock option exercises	3		—		—		—		—		3
Series A common stock dividends	(174	)	—		—		—		—		(174	)
Return of capital to parent	—		—		—		—		—		—
(Distributions to) contributions from noncontrolling interests	—		—		—		214		—		214
Other, net	—		—		(10	)	(2	)	—		(12	)
Net cash provided by (used in) financing activities	(591	)	(203	)	(302	)	315		715		(66	)
Exchange rate effects on cash and cash equivalents	—		—		—		(51	)	—		(51	)
Net increase (decrease) in cash and cash equivalents	—		—		(89	)	276		—		187
Cash and cash equivalents as of beginning of period	—		—		110		670		—		780
Cash and cash equivalents as of end of period	—		—		21		946		—		967

142

29. Subsequent Events

On February 1, 2018, using $158 million of cash on hand and borrowings under the Company's senior unsecured revolving credit facility, the Company completed the acquisition of 100% of the ownership interests of Omni Plastics, L.L.C. and its subsidiaries ("Omni Plastics"). Omni Plastics specializes in custom compounding of various engineered thermoplastic materials. The acquisition further strengthens the Company's global asset base by adding compounding capacity in the Americas. The acquisition will be accounted for as a business combination, and the acquired operations will be included in the Advanced Engineered Materials segment beginning in the first quarter of 2018. The Company has not presented a purchase price allocation related to the fair values of assets acquired and liabilities assumed because the initial accounting for the acquisition was incomplete as of the issuance date of the financial statements. The acquisition is not expected to be material to the Company's 2018 financial position or results of operations.

Subsequent to December 31, 2017, the Company settled its dispute concerning the exercise of an option right by a partner in two of the Company's InfraServ affiliate investments. As a result of the settlement, effective upon processing by the commercial register (estimated February 2018), the Company’s share of ownership in InfraServ GmbH & Co. Gendorf KG will be reduced from 39% to 30% and in Infraserv GmbH & Co. Knapsack KG from 27% to 22%. The shares will be transferred against net payment of approximately €4 million, after taking into account dividends received by the Company since option exercise.

143

INDEX TO EXHIBITS⁽¹⁾ 

Exhibits will be furnished upon request for a nominal fee, limited to reasonable expenses.

Exhibit Number
	Description
2.1†	Transaction Agreement, dated as of June 18, 2017, by and among Celanese US Holdings LLC, BCP VII Jade Cayman Aggregator Ltd., BCP VII Swordfish Aggregator L.P., Acetate UTP C.V., and Lower Tier Partnership Netherlands C.V. (incorporated by reference to Exhibit 2.1 to the Quarterly Report on Form 10-Q filed with the SEC on July 25, 2017).
3.1	Second Amended and Restated Certificate of Incorporation (incorporated by reference to Exhibit 3.1 to the Quarterly Report on Form 10-Q filed with the SEC on October 18, 2016).
3.1(a)	Certificate of Amendment to the Second Amended and Restated Certificate of Incorporation of Celanese Corporation (incorporated by reference to Exhibit 3.1 to the Current Report on Form 8-K filed with the SEC on April 22, 2016).
3.2	Fourth Amended and Restated By-laws, effective as of February 8, 2016 (incorporated by reference to Exhibit 3.1 to the Current Report on Form 8-K filed with the SEC on February 9, 2016).
4.1	Form of certificate of Series A Common Stock (incorporated by reference to Exhibit 4.1 to the Registration Statement on Form S-1 (File No. 333-120187) filed with the SEC on January 13, 2005).
4.2	Indenture, dated May 6, 2011, by and between Celanese US Holdings LLC, Celanese Corporation and Wells Fargo Bank, National Association, as trustee (incorporated by reference to Exhibit 4.2 to the Current Report on Form 8-K (File No. 001-32410) filed with the SEC on May 6, 2011).
4.3	First Supplemental Indenture, 5.875% Senior Notes due 2021, dated May 6, 2011, by and between Celanese US Holdings LLC, the guarantors party thereto and Wells Fargo Bank, National Association, as trustee (incorporated by reference to Exhibit 4.3 to the Current Report on Form 8-K (File No. 001-32410) filed with the SEC on May 6, 2011).
4.4	Second Supplemental Indenture, 4.625% Senior Notes due 2022, dated November 13, 2012, by and between Celanese US Holdings LLC, the guarantors party thereto and Wells Fargo Bank, National Association, as trustee (incorporated by reference to Exhibit 4.2 to the Current Report on Form 8-K (File No. 001-32410) filed with the SEC on November 13, 2012).
4.5	Third Supplemental Indenture, dated September 24, 2014, among Celanese US Holdings LLC, Celanese Corporation, the subsidiary guarantors party thereto, Wells Fargo Bank, National Association, as trustee, Deutsche Bank Trust Companies Americas, as paying agent, and Deutsche Bank Luxembourg S.A., as registrar and as transfer agent (incorporated by reference to Exhibit 4.2 to the Current Report on Form 8-K filed with the SEC on September 25, 2014).
4.6	Fourth Supplemental Indenture, dated December 1, 2014, among Celanese US Holdings LLC, Celanese U.S. Sales LLC and Wells Fargo Bank, National Association, as trustee (incorporated by reference to Exhibit 4.6 to the Annual Report on Form 10-K filed with the SEC on February 6, 2015).
4.7	Fifth Supplemental Indenture, dated July 8, 2015, among Celanese US Holdings LLC, Celanese Sales U.S. Ltd. and Wells Fargo Bank National Association, as trustee (incorporated by reference to Exhibit 4.7 to the Annual Report on Form 10-K filed with the SEC on February 5, 2016).
4.8	Sixth Supplemental Indenture, dated as of September 26, 2016, among Celanese US Holdings LLC, Celanese Corporation, the subsidiary guarantors party thereto, Wells Fargo Bank, National Association, as trustee, and Deutsche Bank Trust Companies Americas, as paying agent, registrar and transfer agent (incorporated by reference to Exhibit 4.2 to the Form 8-K filed with the SEC on September 26, 2016).
4.9	Seventh Supplemental Indenture, dated as of December 11, 2017, among Celanese US Holdings LLC, Celanese Corporation, the subsidiary guarantors party thereto, Wells Fargo Bank, National Association, as trustee, and Deutsche Bank Trust Companies Americas, as paying agent, registrar and transfer agent (incorporated by reference to Exhibit 4.2 to the Form 8-K filed with the SEC on December 11, 2017).
10.1	Credit Agreement, dated as of July 15, 2016, by and among Celanese Corporation, Celanese US Holdings LLC, Celanese Americas LLC, Celanese Europe B.V., Celanese Holdings Luxembourg S.à.r.l., Elwood C.V., certain subsidiaries of Celanese US Holdings LLC from time to time party thereto as borrowers, each lender from time to time party thereto, Bank of America, N.A., as Administrative Agent, a Swing Line Lender and an L/C Issuer and the other Swing Line Lenders and L/C Issuers party thereto (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed with the SEC on July 21, 2016).

144

Exhibit Number
	Description
10.2	Purchase and Sale Agreement, dated August 28, 2013, among Celanese Acetate LLC, Celanese Ltd., Ticona Polymers, Inc. and CE Receivables LLC (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed with the SEC on September 3, 2013).
10.2(a)	Amended and Restated Purchase and Sale Agreement, dated February 2, 2015, among Celanese U.S. Sales LLC, Celanese Ltd., Ticona Polymers, Inc., Celanese International Corporation and CE Receivables LLC (incorporated by reference to Exhibit 10.2(a) to the Annual Report on Form 10-K filed with the SEC on February 6, 2015).
10.2(b)	Joinder Agreement, dated August 1, 2015, among Celanese Sales U.S., Ltd., CE Receivables LLC, Celanese US Holdings LLC, The Bank of Tokyo-Mitsubishi UFJ, Ltd., New York Branch, as administrator and purchaser agent, and PNC Bank, National Association, as purchaser agent (incorporated by reference to Exhibit 10.2(b) to the Annual Report on Form 10-K filed with the SEC on February 5, 2016).
10.2(c)	Receivables Purchase Agreement, dated August 28, 2013, among Celanese International Corporation, CE Receivables LLC, various Conduit Purchasers, Related Committed Purchasers, LC Banks and Purchaser Agents, and The Bank of Tokyo-Mitsubishi UFJ, Ltd., New York Branch, as administrator (incorporated by reference to Exhibit 10.2 to the Current Report on Form 8-K filed with the SEC on September 3, 2013).
10.2(d)	First Amendment to Receivables Purchase Agreement, dated October 31, 2013, among Celanese International Corporation, CE Receivables LLC, various Conduit Purchasers, Related Committed Purchasers, LC Banks and Purchaser Agents, and The Bank of Tokyo-Mitsubishi UFJ, Ltd., New York Branch, as administrator (incorporated by reference to Exhibit 10.2(b) to the Annual Report on Form 10-K filed with the SEC on February 7, 2014).
10.2(e)	Second Amendment to Receivables Purchase Agreement, dated October 20, 2014, among CE Receivables LLC, Celanese International Corporation, various Conduit Purchasers, Related Committed Purchasers, LC Banks and Purchaser Agents, and The Bank of Tokyo-Mitsubishi UFJ, Ltd., New York Branch, as administrator (incorporated by reference to Exhibit 10.2(d) to the Annual Report on Form 10-K filed with the SEC on February 6, 2015).
10.2(f)	Third Amendment to Receivables Purchase Agreement, dated February 2, 2015, among CE Receivables LLC, Celanese International Corporation, various Conduit Purchasers, Related Committed Purchasers, LC Banks and Purchaser Agents, and The Bank of Tokyo-Mitsubishi UFJ, Ltd., New York Branch, as administrator (incorporated by reference to Exhibit 10.2(e) to the Annual Report on Form 10-K filed with the SEC on February 6, 2015).
10.2(g)	Omnibus Amendment, dated as of December 1, 2015, with the effect of Amendment No. 1 to the Amended and Restated Purchase and Sale Agreement, and Amendment No. 4 to the Receivables Purchase Agreement, among Celanese International Corporation, Celanese U.S. Sales LLC, Celanese Ltd., Ticona Polymers, Inc., Celanese Sales U.S. Ltd., CE Receivables LLC, various Conduit Purchasers, Related Committed Purchasers, LC Banks and Purchaser Agents, and The Bank of Tokyo-Mitsubishi UFJ, Ltd., New York Branch, as administrator (incorporated by reference to Exhibit 10.2(g) to the Annual Report on Form 10-K filed with the SEC on February 5, 2016).
10.2(h)	Omnibus Amendment No. 2, dated as of July 8, 2016, with the effect of Amendment No. 2 to the Amended and Restated Purchase and Sale Agreement, and Amendment No. 5 to the Receivables Purchase Agreement, among Celanese International Corporation, Celanese Ltd., Ticona Polymers, Inc., Celanese Sales U.S. Ltd., CE Receivables LLC, various Conduit Purchasers, Related Committed Purchasers, LC Banks and Purchaser Agents, and The Bank of Tokyo-Mitsubishi UFJ, Ltd., New York Branch, as administrator (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed with the SEC on July 12, 2016).
10.2(i)	Performance Guaranty, dated August 28, 2013, by Celanese US Holdings LLC in favor of The Bank of Tokyo-Mitsubishi UFJ, Ltd., New York Branch, as administrator (incorporated by reference to Exhibit 10.3 to the Current Report on Form 8-K filed with the SEC on September 3, 2013).

145

Exhibit Number
	Description
10.3‡	Celanese Corporation 2004 Deferred Compensation Plan (incorporated by reference to Exhibit 10.21 to the Registration Statement on Form S-1 (File No. 333-120187) filed with the SEC on January 3, 2005).
10.3(a)‡	Amendment to Celanese Corporation 2004 Deferred Compensation Plan (incorporated by reference to Exhibit 10.2 to the Current Report on Form 8-K (File No. 001-32410) filed with the SEC on April 3, 2007).
10.3(b)‡	Form of 2007 Deferral Agreement between Celanese Corporation and award recipient (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K (File No. 001-32410) filed with the SEC on April 3, 2007).
10.4‡	Celanese Corporation 2008 Deferred Compensation Plan (incorporated by reference to Exhibit 10.6 to the Annual Report on Form 10-K (File No. 001-32410) filed on February 29, 2008).
10.4(a)‡	Amendment Number One to Celanese Corporation 2008 Deferred Compensation Plan dated December 11, 2008 (incorporated by reference to Exhibit 10.2 to the Registration Statement on Form S-8 (File No. 333-158736) filed with the SEC on April 23, 2009).
10.4(b)‡	Amendment Number Two to Celanese Corporation 2008 Deferred Compensation Plan dated December 22, 2008 (incorporated by reference to Exhibit 10.4(b) to the Annual Report on Form 10-K filed with the SEC on February 7, 2014).
10.5‡	Celanese Corporation 2009 Global Incentive Plan (incorporated by reference to Exhibit 4.4 to the Registration Statement on Form S-8 (File No. 333-158734) filed with the SEC on April 23, 2009).
10.5(a)‡	Form of 2011 Nonqualified Stock Option Award Agreement (incorporated by reference to Exhibit 10.3 to the Current Report on Form 8-K filed with the SEC on September 13, 2011).
10.5(b)‡	Form of Nonqualified Stock Option Award Agreement for Chief Executive Officer (incorporated by reference to Exhibit 10.2 to the Quarterly Report on Form 10-Q filed with the SEC on July 25, 2012).
10.5(c)‡	Form of Amendment to 2010 and 2011 Nonqualified Stock Option Award Agreements, dated April 18, 2012, together with a schedule identifying each of the executive officers with substantially identical agreements (incorporated by reference to Exhibit 10.6 to the Quarterly Report on Form 10-Q filed with the SEC on July 25, 2012).
10.6‡	Celanese Corporation 2009 Global Incentive Plan, as Amended and Restated, April 19, 2012 (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed with the SEC on April 23, 2012).
10.6(a)‡	Form of 2014-2015 Performance-Based Restricted Stock Unit Award Agreement (incorporated by reference to Exhibit 10.1 to the Quarterly Report on Form 10-Q filed with the SEC on April 22, 2014).
10.6(b)‡	Form of 2014-2015 Time-Based Restricted Stock Unit Award Agreement (incorporated by reference to Exhibit 10.2 to the Quarterly Report on Form 10-Q filed with the SEC on April 22, 2014).
10.6(c)‡	Form of 2014-2017 Time-Based Restricted Stock Unit Award Agreement (for non-employee directors) (incorporated by reference to Exhibit 10.1 to the Quarterly Report on Form 10-Q filed with the SEC on July 18, 2014).
10.6(d)‡	Form of 2016-2017 Performance-Based Restricted Stock Unit Award Agreement (incorporated by reference to Exhibit 10.2 to the Quarterly Report on Form 10-Q filed with the SEC on April 19, 2016).
10.6(e)‡	Form of 2016-2017 Time-Based Restricted Stock Unit Award Agreement (incorporated by reference to Exhibit 10.1 to the Quarterly Report on Form 10-Q filed with the SEC on April 19, 2016).
10.6(f)‡	Form of 2016-2017 Nonqualified Stock Option Award Agreement (incorporated by reference to Exhibit 10.3 to the Quarterly Report on Form 10-Q filed with the SEC on April 19, 2016).
10.7‡	Celanese Corporation 2009 Global Incentive Plan, as Amended and Restated, February 9, 2017 (incorporated by reference to Exhibit 10.1 to the Quarterly Report on Form 10-Q filed with the SEC on April 18, 2017).
10.7(a)‡	Form of 2017 Performance-Based Restricted Stock Unit Award Agreement (incorporated by reference to Exhibit 10.2 to the Quarterly Report on Form 10-Q filed with the SEC on April 18, 2017).
10.8‡	Celanese Corporation 2009 Employee Stock Purchase Program (incorporated by reference to Exhibit 4.5 to the Registration Statement on Form S-8 (File No. 333-158734) filed on April 23, 2009).
10.9(a)‡	Executive Severance Benefits Plan, amended effective February 6, 2013 (incorporated by reference to Exhibit 10.2 to the Current Report on Form 8-K (File No. 001-32410) filed with the SEC on February 12, 2013).

146

Exhibit Number
	Description
10.9(b)*‡	Executive Severance Benefits Plan, amended effective October 18, 2017.
10.10‡	Summary of pension benefits for David N. Weidman (updated to include revisions effective after the summary was first filed as Exhibit 10.34 to the Annual Report on Form 10-K filed with the SEC on March 31, 2005) (incorporated by reference to Exhibit 10.13 to the Annual Report on Form 10-K (File No. 001-32410) filed with the SEC on February 11, 2011).
10.10(a)‡	Offer Letter, dated February 25, 2009, between Celanese Corporation and Gjon N. Nivica, Jr. (incorporated by reference to Exhibit 10.3 to the Quarterly Report on Form 10-Q (File No. 001-32410) filed with the SEC on April 28, 2009).
10.10(b)‡	Letter Agreement, dated November 4, 2011, between Celanese Corporation and Mark C. Rohr (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K (File No. 001-32410) filed with the SEC on November 7, 2011).
10.10(c)‡	Agreement and General Release, dated May 6, 2014, between Celanese Corporation and Steven M. Sterin (incorporated by reference to Exhibit 10.2 to the Quarterly Report on Form 10-Q filed with the SEC on July 18, 2014).
10.10(d)‡	Offer Letter, dated May 4, 2015, between Celanese Corporation and Patrick D. Quarles (incorporated by reference to Exhibit 10.1 to the Quarterly Report on Form 10-Q filed with the SEC on July 17, 2015).
10.10(e)‡	Agreement and General Release, dated January 18, 2017, between Celanese Corporation and Gjon N. Nivica Jr. (incorporated by reference to Exhibit 10.3 to the Quarterly Report on Form 10-Q filed with the SEC on April 18, 2017).
10.10(f)‡	Offer Letter, dated January 6, 2017, between Celanese Corporation and Peter G. Edwards (incorporated by reference to Exhibit 10.4 to the Quarterly Report on Form 10-Q filed with the SEC on April 18, 2017).
10.10(g)*‡	Agreement and General Release, dated September 12, 2017, between Celanese Corporation and Patrick D. Quarles.
10.11(a)‡	Form of 2010 Change in Control Agreement between Celanese Corporation and participant, together with a schedule of substantially identical agreements between Celanese Corporation and the individuals identified thereon (incorporated by reference to Exhibit 10.7 to the Quarterly Report on Form 10-Q (File No. 001-32410) filed with the SEC on July 29, 2010).
10.11(b)‡	Form of Amendment No. 1 to 2010 Form of Change in Control Agreement between Celanese Corporation and participant, together with a schedule of substantially identical agreements between Celanese Corporation and the individuals identified thereon (incorporated by reference to Exhibit 10.5 to the Quarterly Report on Form 10-Q (File No. 001-32410) filed with the SEC on October 26, 2011).
10.11(c)‡	Form of 2012 Change in Control Agreement between Celanese Corporation and participant, together with a schedule identifying each of the executive officers with substantially identical agreements (incorporated by reference to Exhibit 10.5 to the Quarterly Report on Form 10-Q filed with the SEC on July 25, 2012).
10.11(d)‡	Form of 2015 Change in Control Agreement between Celanese Corporation and participant, together with a schedule identifying each of the executive officers with substantially identical agreements (incorporated by reference to Exhibit 10.12(e) to the Annual Report on Form 10-K filed with the SEC on February 5, 2016).
10.12‡	Form of Long-Term Incentive Claw-Back Agreement between Celanese Corporation and award recipient (incorporated by reference to Exhibit 10.4 to the Current Report on Form 8-K/A (File No. 001-32410) filed with the SEC on January 26, 2009).
10.13‡	Celanese Americas Supplemental Retirement Savings Plan, as amended and restated effective January 1, 2014 (incorporated by reference to Exhibit 10.14(a) to the Annual Report on Form 10-K filed with the SEC on February 6, 2015).
10.14*‡	Summary of Non-Employee Director Compensation.
12.1*	Statement of Computation of Ratio of Earnings to Fixed Charges.
21.1*	List of subsidiaries of Celanese Corporation.
23.1*	Consent of Independent Registered Public Accounting Firm of Celanese Corporation, KPMG LLP.
23.2*	Consent of Independent Auditors of CTE Petrochemicals Company, BDO USA, LLP.

147

Exhibit Number
	Description
23.3*	Consent of Independent Auditors of National Methanol Company, BDO Dr. Mohamed Al-Amri & Co.
23.4*	Consent of Independent Auditors of National Methanol Company, BDO Dr. Mohamed Al-Amri & Co.
24.1*	Power of Attorney (included on the signature page of this Annual Report on Form 10-K).
31.1*	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2*	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1*	Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2*	Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
99.1 2	Audited financial statements as of December 31, 2016 and 2015 and for each of the years in the three year period ended December 31, 2016 for National Methanol Company (incorporated by reference to Exhibit 99.2 to the Annual Report on Form 10-K filed with the SEC on February 10, 2017).
99.2* 2	Audited financial statements as of December 31, 2017 and 2016 and for each of the years in the three year periods ended December 31, 2017 for CTE Petrochemicals Company.
99.3* 2	Audited financial statements as of December 31, 2017 and 2016 and for each of the years in the two year period ended December 31, 2017 for National Methanol Company.
101.INS*	XBRL Instance 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 herewith.

‡     Indicates a management contract or compensatory plan or arrangement.

† The schedules to this agreement have been omitted in accordance with Item 601(b)(2) of Regulation S-K. The Company agrees to furnish a copy of any schedule to the SEC upon request.

⁽¹⁾  The Company and its subsidiaries have in the past issued, and may in the future issue from time to time, long-term debt. The Company may not file with the applicable report copies of the instruments defining the rights of holders of long-term debt to the extent that the aggregate principal amount of the debt instruments of any one series of such debt instruments for which the instruments have not been filed has not exceeded or will not exceed 10% of the assets of the Company at any pertinent time. The Company hereby agrees to furnish a copy of any such instrument(s) to the SEC upon request.

⁽²⁾  The entities covered by the financial statements included in Exhibits 99.1 and 99.3, and Exhibit 99.2, respectively, are no longer “significant subsidiaries” of the registrant. The financial statements included in Exhibit 99.3 cover only two years’ profit and loss information due to the first year adoption by such company of International Financial Reporting Standards as endorsed in the Kingdom of Saudi Arabia in 2017. The financial statements included in Exhibit 99.1 include profit and loss information for 2016 and 2015 in accordance with accounting principles generally accepted in the Kingdom of Saudi Arabia.

148

EX-10.9(B)

Exhibit 10.9(b)

EXECUTIVE SEVERANCE BENEFITS PLAN

July 2010

Amended September 11, 2012 (effective January 1, 2013)

Amended February 6, 2013 (effective February 6, 2013)

Amended October 18, 2017 (effective October 18, 2017)

Table of Contents

	Page
Table of Contents	i
Executive Severance Benefits Plan Overview	1
Who is Eligible	1
Covered Severance Events	1
How the Severance Benefits Plan Works	2
Severance Payment	2
Continuation of Health Benefits	3
Conditions	3
Employees Rehired After Receiving Benefits	3
When Coverage Ends	3
Claims and Appeals Process	3
Celanese Americas Benefits Committee	4
Duration of the Plan, Ability to Amend or Terminate the Plan	4
Appendix A - Glossary	6

i

Executive Severance Benefits Plan Overview

The Executive Severance Benefits Plan provides a severance payment and continuation of health benefits to certain eligible executive employees of Celanese Americas LLC and its participating affiliated companies (“Celanese”). Ineligible employees shall not receive severance benefits.

Celanese can, in certain circumstances and notwithstanding the provisions of this Plan, in its sole discretion, provide different or enhanced severance benefits to certain employees specified on an individual or group basis. However, the granting of such benefits shall not mean that any other individual employee or group of employees is entitled to such benefits. You are not eligible to participate in this Plan if you are eligible to receive severance benefits under any other plan or arrangement sponsored by Celanese except to the extent specifically set forth in such other plan or arrangement.

Certain terms used in this Plan are defined in the Glossary in Appendix A.

Who is Eligible

The executive officers of Celanese (including the Chief Executive Officer) as well as those employees that have been designated by the CEO are eligible to participate in this Plan.

You are not eligible to receive severance benefits under this Plan unless you are classified as an “employee” on the payroll records of Celanese, regardless of whether it is later determined that you are, or were, an “employee” of Celanese.

Covered Severance Events

If you are an eligible employee, you are entitled to Severance Benefits if you have a Covered Severance Event. You have a Covered Severance Event if you are involuntarily terminated from active employment without Cause.

For purposes of the Plan, your termination is for Cause if you are terminated because of:

(i)your willful failure to perform your duties to Celanese (other than as a result of total or partial incapacity due to physical or mental illness) for a period of 30 days following written notice by Celanese to you of such failure;

(ii) your conviction of, or a plea of nolo contendere to (x) a felony under the laws of the United States or any state thereof or any similar criminal act in a jurisdiction outside the United States or (y) a crime involving moral turpitude;

(iii) your willful malfeasance or willful misconduct which is demonstrably injurious to Celanese;

(iv) your material violation of Celanese’s code of conduct;

(v) your material violation of Celanese’s policies concerning harassment or discrimination;

(vi) your conduct that causes material harm to the business reputation of Celanese or its affiliates; or

(vii) your breach of the provisions of any confidentiality, noncompetition or nonsolicitation obligation to which you are subject.

Enrollment is automatic.

Eligible executive employees who are involuntarily terminated for any other reason (e.g. death, disability, retirement, termination for Cause, or who voluntarily terminate or retire, are not eligible to receive severance benefits under this Plan.

How the Severance Benefits Plan Works

Eligible executive employees who have had a Covered Severance Event are entitled to receive (i) a severance payment, and (ii)

1

continuation of health care benefits, all as further described below.

This Plan does not alter the terms of any grant of equity compensation to you. Your rights with respect to any equity compensation grant are governed by the agreement(s) that establish the terms and conditions of your grant.

Severance Payment

Eligible executive employees who have a Covered Severance Event will receive a severance payment upon the executive’s termination of employment with Celanese and its affiliates. (For this purpose, the termination of employment must constitute a “Separation from Service” as defined in Section 409A of the Internal Revenue Code.)

The Severance Payment is an amount equal to the executive’s base annual salary in effect on the date of termination plus an amount equal to the executive’s target bonus for the year (150% of base annual salary and target bonus for the CEO, the COO and any other executive officer with a title of Executive Vice President). The Severance Payment will be made as soon as practicable following the eligible executive’s Separation from Service, but in no event later than December 31 of the year in which such Separation from Service occurs or, if later, the 15^th day of the third month following such Separation from Service.

In addition, the executive will be entitled to a pro rata bonus payment for the year of termination (a “Supplemental Payment”). The Supplemental Payment is an amount equal to the executive’s target bonus payment for the year of termination multiplied by a fraction, the numerator of which is the number of days in the year of the executive’s termination up to and including the date of the executive’s termination and the denominator of which is 365 (or, 366, as applicable). The Supplemental Payment (1) shall be based on actual performance of the Company for the year of termination (with a minimum of 1.0 personal modifier) rather than target performance, and (2) instead of being paid at the same time as the Severance Payment,

shall be paid at the same time annual bonuses are paid to other executive employees who do not terminate employment during the year but in no event later than the 15^th day of the third month of the year following such Separation from Service.

For purposes of Section 409A of the Internal Revenue Code, the Severance Payment and the Supplemental Payment are intended to be a separate “payment” within the meaning of Treasury Regulation Section 1.409A-2(b)(2) and to be exempt from Section 409A of the Internal Revenue Code pursuant to Treasury Regulation Section 1.409A-1(b)(4).

Any amounts that the eligible executive owes to Celanese will be deducted from the eligible executive’s severance payment. As an additional condition to receiving the severance payment, the Plan Administrator may require the eligible executive to execute a written agreement that authorizes Celanese to deduct any amounts the eligible executive owes to Celanese prior to the payment of the severance payment under the Plan.

Continuation of Health Benefits

Eligible executives who have a Covered Severance Event will be entitled to elect, under COBRA, to continue to participate in the Celanese Americas Medical Plan for a period of 18 months following the month of termination.

If the eligible executive elects to continue coverage under the Medical Plan under COBRA, no COBRA premiums will be charged for the first 12 months of COBRA coverage (18 months of coverage for the CEO).

For the next 6 months (i.e., for the 13^th through 18^th month following termination), the eligible executive must elect to continue coverage under COBRA and must pay the COBRA premium in order to continue to participate in the Medical Plan.

Health coverage will terminate when the eligible executive becomes eligible to participate in any other employer-sponsored health plan. You must notify Celanese when

2

you become eligible for any other employer-provided health care benefits.

Other

Eligible executives who have a Covered Severance Event will be entitled to receive outplacement services following termination with an outplacement firm selected by the Company and subject to any limits as the Company may determine.

Conditions

As a condition for receiving severance benefits under this Plan, you must (1) return all property of Celanese;(2) hold confidential any and all information concerning Celanese; (3) cooperate fully with Celanese; (4) execute and deliver such forms as required by Celanese; and (5) execute and deliver to Celanese a general claims release, restrictive covenants and cooperation agreement in the form provided to you by Celanese. If you fail to fully comply with any of the obligations described in this paragraph, your benefits may be discontinued.

Employees Rehired After Receiving Benefits

If you are a former employee and you are applying for rehire consideration, you will be considered with all other external candidates and have no guaranteed entitlement to a prior job classification, level, or rate of pay. The position will reflect Celanese’s current evaluation of the position in the current organization structure.

If you are a former employee who is rehired after receiving benefits, you will not receive recognition of prior service in the determination of subsequent benefits, except to the extent provided by law. Calculation of subsequent benefits will begin as of the date you are rehired as a Celanese employee. Any prior service previously credited will not be included for the purpose of the calculation of benefits entitlement after you are rehired.

All issues regarding the treatment of any service time since separation from employment are to be resolved by the Plan Administrator before an individual with prior service is rehired.

When Coverage Ends

Your coverage under this Plan ends once you terminate from Celanese or when you are no longer an eligible employee.

Claims and Appeals Process

If you believe that you are entitled to benefits under the Plan, you must file a claim for benefits. A claim for benefits must be made no later than one year following the date of your termination of employment with Celanese. If you do not file a claim for benefits within one year of the date of your termination of employment with Celanese, you will not be entitled to any benefits under the Plan.

A claim for benefits is submitted to the Plan Administrator. The Plan Administrator has the sole discretionary authority to approve or deny each claim. In the event the Plan Administrator denies, in whole or in part, an initial claim for benefits by a participant or his beneficiary, the Plan Administrator will furnish notice of the adverse determination to you.

The notice will be forwarded to you within 90 days of receipt of the claim by the Plan Administrator. However, in special circumstances, the Plan Administrator may extend the response period for up to an additional 90 days, and must notify you in writing of the extension, and will specify the reasons for the extension. If for any reason you do not receive a response from the Plan Administrator within the time prescribed, the claim will be deemed denied.

Within 60 days of receipt of a notice of an adverse determination, you or your duly authorized representative may petition the Plan Administrator in writing for a full and fair review of the adverse determination (see address below for information on how to contact the Plan Administrator). You or your

3

duly authorized representative will have the opportunity to submit comments in writing, documents, records, and other relevant information to the Plan Administrator. You will also have the right to be furnished, free of charge and upon request, reasonable access to, and copies of, all documents, records and other relevant information. Relevant information includes any information that was submitted, considered or generated in the course of the decision regardless of whether such information was relied upon in making the benefit determination. You may also request any information demonstrating that, where appropriate, the Plan is acting consistently with respect to other participants.

The Plan Administrator will review the denial and will take into account all documents, records, and other information submitted by you regardless of whether such information was submitted or considered in the initial determination. The Plan Administrator will communicate its decision and provide an explanation to you in writing within 60 days of receipt of the petition. However, in special circumstances, the Plan Administrator may extend the response period for up to an additional 60 days, in which event it will notify you in writing prior to the commencement of the extension and specify the reasons for the extension. If for any reason, the written decision on review is not furnished within the time prescribed, the claim will be deemed denied on review.

The written notice of decision by the Plan Administrator will set forth:

• The specific reasons for the adverse determination;

} A specific reference to the pertinent Plan provisions on which the adverse determination is based;

} A description of any additional information necessary for you to perfect the claim and an explanation of why such information is necessary. In the case of a notification of an appealed claim, the notice will also include a statement that you are entitled to receive reasonable access to and copies of all documents, records, and other

relevant information with respect to the claim; and

} A description of the Plan’s review procedures (or, in the case of a notification of an appealed claim, a description of any voluntary appeal procedures) and the time limits applicable to such procedures, including a statement of the claimant’s right to bring a civil action under section 502 of ERISA following an adverse decision by the Plan Administrator.

Celanese Americas Benefits Committee

The Plan Administrator is the Celanese Americas Benefits Committee. The Benefits Committee has general responsibility and sole discretionary authority for administering the Plan and reviewing claims for benefits and appeals or denied claims. Any determination by the Benefits Committee is final and conclusive and will not be overturned unless it is deemed to be arbitrary and capricious. The Celanese Americas Benefits Committee can be contacted at:

Celanese Americas Benefits Committee

c/o Benefits Department

222 W. Las Colinas Blvd., Suite 900N

Irving, TX 75039

972-443-4000

Duration of the Plan, Ability to Amend or Terminate the Plan

The initial term of the Plan expires on December 31, 2011. However, the Plan will automatically renew for successive one-year periods if the Plan Sponsor does not, by action of its Board of Managers at least 90 days prior to the end of each such year (beginning with the year ending December 31, 2011), take action to terminate the Plan. The Plan Sponsor retains the right to amend or terminate the Plan at any time, whether before or after a Covered Severance Event, provided that any amendment or termination that

4

prospectively reduces benefits shall not be effective earlier than 90 days after adoption.

Celanese retains the right to amend or terminate the Medical Plan and/or the Retiree Medical Plan at any time, whether before or after a Covered Severance Event.

5

APPENDIX A

Glossary

Cause - See page 1 under “Covered Severance Events”

Celanese - Celanese Americas LLC and its participating affiliated companies

Continuation of Health Benefits - See page 3 under “Continuation of Health Benefits”

Covered Severance Event - See page 1 under “Covered Severance Events”

ERISA - Employee Retirement Income Security Act of 1974, as amended

Medical Plan - The Celanese Americas Medical Plan

Plan - This Celanese Americas Executive Severance Benefits Plan

Plan Administrator - Celanese Americas Benefits Committee

Plan Sponsor – Celanese Americas LLC

Severance Payment – See Page 3 under “Severance Payment”

Severance Benefits - The benefits provided under this Plan, including a Severance Payment and Continuation of Health Benefits

6

7

EX-10.10(G)

Exhibit 10.10(g)

AGREEMENT AND GENERAL RELEASE

Celanese Corporation, its’ subsidiaries and its affiliates (“Company” or “Celanese”), 222 W. Las Colinas Blvd., Irving, Texas 75039 and Pat Quarles, such person’s heirs, executors, administrators, successors, and assigns (“Executive”), agree that:

1.     Last Day of Employment. The last day of employment with the Company is: December 31, 2017 (“Separation Date”) and his last day of work in the office will be September 29, 2017.Unless otherwise expressly agreed to by the Company, if Executive voluntarily resigns with effect before the last day of work in the office, Executive shall immediately be removed from the payroll and forfeit all rights to the Consideration set forth in Paragraph 3 below. In order to remain on the payroll until the Separation Date (or Early Separation Date, as applicable) and receive the Consideration set forth in Paragraph 3 below, during the period of time prior to September 29, 2017, Executive shall comply with all Company policies and procedures and perform Executive’s duties faithfully, to the best of Executive’s ability and to the satisfaction of the Company and to the promotion of its business as needed, including but not limited to work on projects assigned to Executive and assistance with transition duties. Before and after Executive ceases working in the office, he will be permitted to engage in activities during regular business hours related to his efforts to pursue other professional opportunities.

2.     Early Separation Date. If Executive chooses a voluntary Separation Date earlier than the Separation Date set forth above (such date referenced as the “Early Separation Date” or “ESD”), Executive will be released as of the ESD. Executive will still be eligible for the Consideration set forth in Paragraph 3 of this Agreement and General Release (“Agreement”). However, Executive agrees to waive any additional salary payment for the balance of the time period commencing on the date of the ESD through the Separation Date. In addition, Long Term Equity Agreements (LTI’s), vacation payout and healthcare coverage set forth in Paragraphs 3 (c), (e), and (f) below, respectively, will be prorated to the ESD. For purposes of this Agreement, the last day of employment will be either the Separation Date or ESD, whichever is applicable.

3.     Consideration. Each separate installment under this Agreement shall be treated as a separate payment for purposes of determining whether such payment is subject to or exempt from compliance with the requirements of Section 409A of the Internal Revenue Code. In consideration for signing this Agreement and compliance with the promises made herein, Company and Executive agree:

a. Voluntary Resignation. Executive agrees to voluntarily resign from employment with the Company effective on the Separation Date or ESD, whichever is earlier. Within three business days following the Effective Date of this Agreement, Executive will sign and deliver to the Company a voluntary resignation of employment letter using the format set forth at Exhibit A.

b. Annual Bonus. For 2017, Executive will be ineligible to receive a bonus.

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c. Long-Term Equity ( LTI’s). The Company and Executive agree that all of the equity award agreements to which Executive is currently a party (collectively, the “EquityAwards”) are listed on Exhibit B. The Company and Executive agree, that, notwithstanding any provision in the Equity Agreements to the contrary, based on the terms and provision of this Agreement and the assumption of a departure on the Separation Date or ESD, Executive will vest in a prorated portion of the outstanding Equity Awards as summarized in Exhibit B and more fully described in the spreadsheet presented to Executive by email dated August 24, 2017, which units shall vest on the date they would otherwise vest if Executive’s employment had continued through each applicable vesting date. If Executive departs on the ESD, or otherwise before the Separation Date, the proration of the Equity Awards will be adjusted accordingly to reflect the earlier departure date.

d. Pension and 401(k) Plan Vesting.If Executive is eligible, the Company will fulfill its obligations according to the terms of the respective Plans.

e. Unused Vacation. The Company will pay to Executive wages for any unused vacation for 2017, and any approved vacation carried over from 2016 under the Company’s standard procedure for calculating and paying any unused vacation to separated employees. The gross amount due to Executive, less any lawful deductions, will be payable within 30 days of the Separation Date or ESD; subject to Executive providing the details of any vacation days utilized during 2017.

f. Company Benefit Plans.Medical and dental coverage will continue according to the Employee’s current medical and dental plan elections, with no premium cost to the Employee after the Separation Date or ESD, until the earlier of twelve (12) full months after the last day in the month of the Separation Date (December 31, 2018), the ESD or the date on which the Executive becomes covered under another medical or dental plan. All other normal company programs (e.g. life insurance, LTD, 401(k) contributions, etc.) will continue until the Separation Date or ESD.

g. COBRA Healthcare. If Executive applies for COBRA benefits, Executive shall be entitled to elect to continue such COBRA coverage for six (6) months, at Executive’s expense.

h. Return of Company Property.Executive will surrender to Company, on a mutually agreeable date, all Company materials, including, but not limited to Executive’s Company laptop computer, phone, credit card, calling cards, etc. Executive will be responsible for any outstanding balances for any personal expenses charged on the Company credit card which have not already been reconciledReturn of Company Property.Executive will surrender to Company, on a mutually agreeable date, all Company materials, including, but not limited to Executive’s Company laptop computer, phone, credit card, calling cards, etc. Executive will be responsible for any outstanding

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balances for any personal expenses charged on the Company credit card which have not already been reconciled.

i. Withholding. The payments and other benefits provided under this Agreement shall be reduced by applicable withholding taxes and other lawful deductions.

j. Indemnification and Protection. The Company will maintain in effect directors and officers liability insurance coverage which provides defense and indemnity to Executive equivalent to that provided to active officers and directors of the Company.To the extent not otherwise covered by insurance, and to the maximum extent permitted by law and the Company’s Articles of Incorporation and other governing documents, the Company will defend, indemnify and hold Executive harmless from and against any legal claims, lawsuits, or liabilities arising out of or related to his service as an officer, employee or agent of the Company equivalent to that provided to active officers, employees or agents of the Company.

4.No Consideration Absent Execution of this Agreement. Executive understands and agrees that Executive would not receive the monies and/or benefits specified in Paragraph 3 above, unless Executive signs this Agreement on the signature page without having revoked this Agreement pursuant to Paragraph 16 below, signs the letters at Exhibit A, C, D and E and fulfills the promises contained herein.

5.General Release of Claims. Except as otherwise set forth herein, Executive knowingly and voluntarily releases and forever discharges, to the full extent permitted by law, in all countries, including but not limited to the U.S., the People’s Republic of China (PRC), U.K. and Germany, the Company, its parent corporation, affiliates, subsidiaries, divisions, predecessors, successors and assigns and the current and former employees, officers, directors and agents thereof (collectively referred to throughout the remainder of this Agreement as “Company”), of and from any and all claims, known and unknown, asserted and unasserted, Executive has or may have against Company as of the date of execution of this Agreement, including, but not limited to, any alleged violation of:

• Title VII of the Civil Rights Act of 1964, as amended;

• The Civil Rights Act of 1991;

• Sections 1981 through 1988 of Title 42 of the United States Code, as amended;

• The Employee Retirement Income Security Act of 1974, as amended;

• The Immigration Reform and Control Act, as amended;

• The Americans with Disabilities Act of 1990, as amended;

• The Age Discrimination in Employment Act of 1967, as amended;

• The Workers Adjustment and Retraining Notification Act, as amended;

• The Occupational Safety and Health Act, as amended;

• The Sarbanes-Oxley Act of 2002;

• The Wall Street Reform Act of 2010 (Dodd Frank);

• The Family Medical Leave Act of 1993 (FMLA);

• The Texas Civil Rights Act, as amended;

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• The Texas Minimum Wage Law, as amended;

• Equal Pay Law for Texas, as amended;

• Any other federal, state or local civil or human rights law, or any other local, state or federal law, regulation or ordinance including but not limited to the State of Texas; or any law, regulation or ordinance of a foreign country, including but not limited to the PRC, Federal Republic of Germany and the UK.

• Any public policy, contract, tort, or common law;

• The employment, labor and benefits laws and regulations in all countries in addition to the U.S. including but not limited to the U.K. and Germany;

• Any claim for costs, fees, or other expenses including attorneys’ fees incurred in these matters.

6.Affirmations. Executive affirms that Executive has not filed, caused to be filed, or presently is a party to any claim, complaint, or action against Company in any forum or form. Provided, however, that the foregoing does not affect any right to file an administrative charge with the Equal Employment Opportunity Commission (“EEOC”), OSHA, The National Labor Relations Board (“NLRB”), or a charge or complaint under applicable securities laws with the Securities and Exchange Commission (“SEC”) or any other federal, state, or municipal agency with appropriate jurisdiction (a “Government Agency”), subject to the restriction that if any such charge or complaint is filed, Employee agrees not to violate the confidentiality provisions of this Agreement, except by an order of a court having competent jurisdiction, if permitted by applicable law, or if in connection with confidential communications with a Government Agency or an investigation conducted by a Government Agency with appropriate jurisdiction. Employee further agrees and covenants that should Executive or any other person, organization, or other entity file, charge, claim, sue or cause or permit to be filed any charge or claim with the EEOC, or any civil action, suit or legal proceeding against the Company involving any matter occurring at any time in the past, Executive will not seek or accept any personal relief (including, a judgment, relief or settlement) in such charge, civil action, suit or proceeding, unless permitted under law or regulation. This Agreement does not limit Executive’s right to receive an award for information provided to the SEC. Executive further affirms that Executive has reported all hours worked as of the date of this Agreement and has been paid and/or has received all leave (paid or unpaid), compensation, wages, bonuses, commissions, and/or benefits to which Executive may be entitled and that no other leave (paid or unpaid), compensation, wages, bonuses. commissions and/or benefits are due to Executive, except as provided in this Agreement. Executive furthermore affirms that Executive has no known workplace injuries or occupational diseases.

7.Confidentiality. Executive and the Company agree not to disclose any information regarding the existence or substance of this Agreement, except to Executive's spouse, tax advisor, and an attorney with whom Executive chooses to consult regarding Executive's consideration of this Agreement or as permitted by applicable law. Executive agrees and recognizes that any knowledge or information of any type whatsoever of a confidential nature relating to the business of the Company or any of its subsidiaries, divisions or affiliates, including, without limitation, all types of trade secrets, client lists or information, employee lists or information, information regarding product development, marketing plans, management organization, operating policies or manuals, performance results, business plans, financial records, or other financial commercial

– 4 –

business or technical information (collectively "Confidential Information”), must be protected as confidential, not copied, disclosed or used other than for the benefit of the Company at any time unless and until such knowledge or information is in the public domain through no wrongful act by Executive. Executive further agrees not to divulge to anyone (other than the Company or any persons employed or designated by the Company), publish or make use of any such Confidential Information without the prior written consent of the Company, except by an order of a court having competent jurisdiction or if in connection with confidential communications with a Government Agency or an investigation conducted by a Government Agency with appropriate jurisdiction.

8.Notification of Allowable Disclosure of Trade Secret Information in the United States. Executive may not be held criminally or civilly liable under any federal or state trade secret law for the disclosure of a trade secret that: (a) is made (i) in confidence to a federal, state, or local government official, either directly or indirectly, or to an attorney; and (ii) solely for the purpose of reporting or investigating a suspected violation of law; or (b) is made in a complaint or other document that is filed under seal in a lawsuit or other proceeding. Further, if Executive files a lawsuit against the Company alleging retaliation for reporting a suspected violation of law, the Executive may disclose the trade secret to Executive's attorney. Executive may also use the trade secret information in a court proceeding, provided that he or she files any document containing the trade secret under seal and does not disclose the trade secret except pursuant to a court order.

9.Non-competition/Non-solicitation/Non-hire. Executive acknowledges and recognizes the highly competitive and confidential nature of the business of the Company. The Long-Term Incentive Award Claw-Back Agreement (“Claw-Back Agreement”) and the New Employee Restrictive Covenant Agreement (“RCA”), dated May 15, 2015 and June 11, 2015 respectively, copies of which have been provided to Executive, (collectively “Claw-Back/RCA Agreements"), include, among other obligations, promises made by Executive regarding safeguarding confidential Company information, non-competition with the Company and the non-solicitation/no hire of current employees and contractors. Both the Claw-Back Agreement and the RCA remain in full force and effect and are part of this Agreement, except to the extent they are modified below.

The Clawback/RCA Agreements and all other agreements executed by Executive which contain non-compete provisions are modified as follows: The non-competition provisions will only prohibit Executive from being employed by BP plc., Eastman Chemical Company, Lyondell Basell Industries N.V., Wacker Chemie AG, Saudi International Petrochemical Company, d/b/a SIPCHEM, Daicel Corporation, Darien Chemical Corporation or any company with operations in China that manufactures, sells, distributes or markets product similar to Celanese's acetyl products or any company that is a subsidiary of those companies. With respect to the Dow Chemical Company (Dow), Executive agrees to not become employed by the Dow unit that manufactures, sells, distributes, or markets Vinyl Acetate Monomer (VAM), such that VAM would not be a significant element, (greater than 10%), of Executive's oversight. The Restricted Period is two years from the earlier of the Separation Date or ESD.

10.Governing Law and Interpretation. This Agreement shall be governed and construed in accordance with the laws of the State of Texas, without regard to its conflict of laws provision. In the event Executive or Company breaches any provision of this Agreement, Executive and Company

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affirm that either may institute an action to specifically enforce any term or terms of this Agreement. Should any provision of this Agreement be declared illegal or unenforceable by any court of competent jurisdiction and cannot be modified to be enforceable, excluding the general release language, such provision shall immediately become null and void, leaving the remainder of this Agreement in full force and effect.

11.Non-admission of Wrongdoing. The parties agree that neither this Agreement nor the furnishing of the consideration for this Release shall be deemed or construed at any time for any purpose as an admission by Company of any liability or unlawful conduct of any kind.

12.Non-Disparagement. Executive agrees not to disparage, or make disparaging remarks or send any disparaging communications concerning, the Company, its reputation, its business, and/or its directors, officers, managers. Likewise the Company’s senior management agrees not to disparage, or make any disparaging remark or send any disparaging communication concerning Executive, her reputation and/or her business.

13.Future Cooperation after Separation Date. After the Separation Date,Executive agrees to make reasonable efforts to assist Company including but not limited to: responding to telephone calls, assisting with transition duties, assisting with issues that arise after the Separation Date and assisting with the defense or prosecution of any lawsuit or claim. This includes but is not limited to providing deposition testimony, attending hearings and testifying on behalf of the Company. The Company will reimburse Executive for reasonable time and expenses in connection with any future cooperation after the Separation Date, at her current annual base pay, converted to an hourly rate. Time and expenses can include loss of pay or using vacation time at a future employer. The Company shall reimburse the Executive within 30 days of remittance by Executive to the Company of such time and expenses incurred.

14.Injunctive Relief. Executive agrees and acknowledges that the Company will be irreparably harmed by any breach, or threatened breach by her of this Agreement and that monetary damages would be grossly inadequate. Accordingly, she agrees that in the event of a breach, or threatened breach by him of this Agreement the Company shall be entitled to apply for immediate injunctive or other preliminary or equitable relief, as appropriate, in addition to all other remedies at law or equity.

15.Review Period. Executive is hereby advised Executive has up to twenty-one (21) calendar days, from the date Executive receives it, to review this Agreement and to consult with an attorney prior to execution of this Agreement. Executive agrees that any modifications, material or otherwise, made to this Agreement do not restart or affect in any manner the original twenty-one (21) calendar day consideration period.

16.Revocation Period and Effective Date. If Executive signs and returns to the Company a copy of this Agreement, Executive has a period of seven (7) days (the “Revocation Period”) following the date of such execution to revoke this Agreement, after which time this agreement will become effective (the “Effective Date”) if not previously revoked. In order for the revocation to

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be effective, written notice must be received by the Company no later than close of business on the seventh day after Executive signs this Agreement at which time the Revocation Period shall expire.

17.Amendment. This Agreement may not be modified, altered or changed except upon express written consent of both parties wherein specific reference is made to this Agreement.

18.Entire Agreement. This Agreement sets forth the entire agreement between the parties hereto, and fully supersedes any prior obligation of the Company to Executive. Executive acknowledges that Executive has not relied on any representations, promises, or agreements of any kind made to Executive in connection with Executive’s decision to accept this Agreement, except for those set forth in this Agreement.

19.HAVING ELECTED TO EXECUTE THIS AGREEMENT, TO FULFILL THE PROMISES AND TO RECEIVE THE SUMS AND BENEFITS IN PARAGRAPH 2 ABOVE, EXECUTIVE FREELY AND KNOWINGLY, AND AFTER DUE CONSIDERATION, ENTERS INTO THIS AGREEMENT INTENDING TO WAIVE, SETTLE AND RELEASE ALL CLAIMS EXECUTIVE HAS OR MIGHT HAVE AGAINST COMPANY.

IN WITNESS WHEREOF, the parties hereto knowingly and voluntarily executed this Agreement as of the following date: 12 September 17.

Executive	Celanese Corporation
By: /s/ Pat Quarles	By:	/s/ Shannon Jurecka

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To: Pat Quarles

From: Shannon Jurecka

Re:    Agreement and General Release

Dear Pat,

This letter confirms that on September 12, 2017, I personally delivered to you the enclosed Agreement and General Release. You have until October 3, 2017 which is at least 21 days after receipt, to consider this Agreement and General Release, in which you waive important rights, including those under the Age Discrimination in Employment Act. To this end, we advise you to consult with an attorney of your choosing prior to executing this Agreement and General Release.

Very truly yours,

/s/ Shannon Jurecka

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Exhibit A

To: Scott Sutton

From: Pat Quarles

Date: 12 Spt 17

Subject: Letter of Voluntary Resignation

The purpose of this letter is to inform you that I have decided to voluntarily resign from Celanese. The effective date of my departure and my resignation as an employee will December 31, 2017 (Separation Date) unless I elect to terminate my employment sooner pursuant to the terms of our Agreement (Early Separation Date). As of September 29, 2017, I hereby resign from any and all positions I may hold as a corporate officer, director, committee member or manager of the Company and its subsidiaries and affiliates (including without limitation any positions as an officer, committee member, employee, manager and/or director), and from all positions held on behalf of the Company (e.g., external and joint venture board memberships, internal committee positions, etc.).

Sincerely,

/s/Pat Quarles            

Pat Quarles

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Performance- and Time-Based RSUs: Prorate on termination date and payout on original vesting date

(1) 2016 and 2017 Performance-Based RSUs will be cancelled on separation date

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Exhibit C

September 19, 2017

Shannon Jurecka

Celanese

222 W. Las Colinas Blvd.

Suite 900 N.

Irving, TX 75039

Re: Agreement and General Release

Dear Shannon:

On September 12, 2017, I executed an Agreement and General Release between Celanese and me. I was advised by Celanese, in writing, to consult with an attorney of my choosing, prior to executing the Agreement and General Release.

I have at no time revoked my acceptance or execution of that Agreement and General Release and hereby reaffirm my acceptance of that Agreement and General Release.

Very truly yours,

/s/ Pat Quarles            

Pat Quarles

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Exhibit D

Supplemental Agreement and General Release

December 31, 2017

Shannon Jurecka

Celanese

222 W. Las Colinas Blvd.

Suite 900 N.

Irving, TX 75039

Re: Supplemental Agreement and General Release

Dear Shannon:

I hereby reaffirm and acknowledge that the Agreement and General Release executed on September 12, 2017, also applies from the date it was executed until my last day of employment today, December 31,2017.

Sincerely,

/s/ Pat Quarles            

Pat Quarles

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Exhibit E

Supplemental Non-Revocation Agreement

January 7, 2018

Shannon Jurecka

Celanese

222 W. Las Colinas Blvd.

Suite 900 N.

Irving, TX 75039

Re: Agreement and General Release & Supplemental Agreement and General Release

Dear Shannon:

On September 12, 20 17, I executed an Agreement and General Release between Celanese and me, and on December 31, 2017 I executed a Supplemental Agreement and General Release (Exhibit D). I was advised by Celanese, in writing, to consult with an attorney of my choosing, prior to executing this Agreement and General Release.

I have at no time revoked my acceptance or execution of the Agreement and General Release or the Supplemental Agreement and General Release and hereby reaffirm my acceptance of both agreements. Therefore, in accordance with the terms of our Agreement and General Release, I hereby request payment of the Consideration described in Paragraph 3 pursuant to the terms of that Agreement.

Very truly yours,

/s/ Pat Quarles            

Pat Quarles

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EX-10.14

Exhibit 10.14

Summary of Non-Employee Director Compensation

Each non-employee director of Celanese Corporation (the "Company") is entitled to (i) an annual cash retainer of $105,000, which is paid in quarterly installments, in arrears, and (ii) an annual equity retainer of $150,000 in restricted stock units (awarded at the first regular board meeting following the Annual Meeting of Stockholders). In addition, the chair of the nominating and corporate governance committee and the environmental, health, safety and public policy committee receives an annual fee of $15,000, and the chair of the audit committee and the compensation and management development committee receives an annual fee of $20,000. The lead director receives an annual fee of $25,000. These amounts are paid in quarterly installments, in arrears, and prorated for actual service.

Non-employee directors are also entitled to participate in the Company's 2008 Deferred Compensation Plan, which is an unfunded, nonqualified deferred compensation plan that allows directors the opportunity to defer a portion of their compensation in exchange for a future payment amount equal to their deferments plus or minus certain amounts based upon the market performance of specified measurement funds selected by the participant.

EX-12.1

Exhibit 12.1

Celanese Corporation and Subsidiaries

Statement of Computation of Ratio of Earnings to Fixed Charges

	Year Ended December 31,
	2017		2016		2015		2014		2013
	(In $ millions, except ratios)
Earnings:
Pre-tax income from continuing operations before adjustment for noncontrolling interest	1,075		1,030		488		941		1,609
Subtract
Equity in net earnings of affiliates	(183	)	(155	)	(181	)	(246	)	(180	)
Add
Net (earnings) loss attributable to non-controlling interests	(6	)	(6	)	19		4		—
Income distributions from equity investments	131		131		176		148		141
Amortization of capitalized interest	4		4		5		3		3
Total fixed charges	181		176		185		217		234
Total earnings as defined before fixed charges	1,202		1,180		692		1,067		1,807
Fixed charges:
Interest expense	122		120		119		147		172
Capitalized interest	6		5		15		16		9
Estimated interest portion of rent expense	53		51		51		54		53
Cumulative preferred stock dividends	—		—		—		—		—
Guaranteed payment to minority shareholders	—		—		—		—		—
Total fixed charges	181		176		185		217		234
Ratio of earnings to fixed charges	6.6x		6.7x		3.7x		4.9x		7.7x

EX-21.1

Exhibit 21.1

List of Subsidiaries of Celanese Corporation

(As of December 31, 2017)

Name of Company	Jurisdiction
Aggregate Ownership of more than 50% (100% aggregate ownership unless otherwise indicated)
Acetate C.V.	Netherlands
Acetate Europe Coöperatief U.A.	Netherlands
Acetate Holdings LLC	Delaware
Acetate Holdings Luxembourg S.à r.l.	Luxembourg
Acetate Intermediate Holdings LLC	Delaware
Acetate International LLC	Delaware
Acetate LTP GP Netherlands LLC	Delaware
Acetate LTP LiabilityCo LLC	Delaware
Acetate LTP Limited Partner Netherlands LLC	Delaware
Acetate Luxembourg S.à r.l.	Luxembourg
Acetate Netherlands Holdings LLC	Delaware
Acetate PledgeCo LLC	Delaware
Acetate Sales U.S. Ltd.	Texas
Acetate US Holdings LLC	Delaware
Acetate UTP Holdings LLC	Delaware
Acetex Chimie S.A.S.	France
Acetex (Cyprus) Ltd.	Cyprus
Alberta Ag - Industries Ltd.	Canada
Cadwell Limited	Cayman Islands
CCC Environmental Management and Solutions GmbH & Co. KG	Germany
CCC Environmental Management and Solutions Verwaltungs-GmbH	Germany
CE Europe Holdings LLC	Delaware
CE Mexico Holdings LLC	Delaware
CE Receivables LLC	Delaware
Celanese (China) Holding Co., Ltd.	China
Celanese (Nanjing) Acetyl Derivatives Co., Ltd.	China
Celanese (Nanjing) Acetyl Intermediates Co., Ltd.	China
Celanese (Nanjing) Chemical Co., Ltd.	China
Celanese (Nanjing) Diversified Chemical Co., Ltd.	China
Celanese (Shanghai) International Trading Co., Ltd.	China
Celanese (Suzhou) Engineering Plastics Co., Ltd.	China
Celanese Acetate C.V.	Netherlands
Celanese Acetate LLC	Delaware
Celanese Alpine S.à r.l. & Co. KG	Germany
Celanese Americas LLC	Delaware
Celanese BVBA	Belgium
Celanese Canada ULC	Canada
Celanese Chemicals, Inc.	Delaware
Celanese Chemicals India Private Limited	India
Celanese Chemicals S.A. (Pty) Ltd.	South Africa
Celanese Comercial S. de R.L. de C.V.	Mexico
Celanese C.V.	Netherlands
Celanese Deutschland Holding GmbH	Germany
Celanese do Brasil Ltda.	Brazil

Celanese Emulsions Ltd.	United Kingdom
Celanese Emulsions Pension Plan Trustees Limited	United Kingdom
Celanese Europe B.V.	Netherlands
Celanese EVA Performance Polymers LLC	Delaware
Celanese EVA Performance Polymers Partnership	Canada
Celanese Far East Limited	Hong Kong
Celanese France Holdings S.à r.l.	Luxembourg
Celanese Global Relocation LLC	Delaware
Celanese Holdings B.V.	Netherlands
Celanese Holdings Luxembourg S.à r.l.	Luxembourg
Celanese Hungary Kft.	Hungary
Celanese Iberica Holdings S.à r.l.	Luxembourg
Celanese International Corporation	Delaware
Celanese International Holdings Luxembourg S.à r.l.	Luxembourg
Celanese IP Germany GmbH	Germany
Celanese IP Hungary Bt.	Hungary
Celanese Japan Limited	Japan
Celanese Korea Ltd.	Korea
Celanese Ltd.	Texas
Celanese Materials Mexico S. de R.L. de C.V.	Mexico
Celanese Mexico Holdings LLC	Delaware
Celanese Operations Mexico S. de R.L. de C.V.	Mexico
Celanese Netherlands Holdings C.V.	Netherlands
Celanese Production Belgium BVBA	Belgium
Celanese Production Germany GmbH & Co. KG	Germany
Celanese Production Netherlands B.V.	Netherlands
Celanese Production Sweden AB	Sweden
Celanese Production UK Limited	United Kingdom
Celanese Property Germany GmbH & Co. KG	Germany
Celanese PTE. LTD.	Singapore
Celanese S.A.	Argentina
Celanese Sales Austria GmbH	Austria
Celanese Sales Czech Republic s.r.o.	Czech Republic
Celanese Sales France S.A.S.	France
Celanese Sales Germany GmbH	Germany
Celanese Sales Ibérica, S.L.	Spain
Celanese Sales Italy S.r.l.	Italy
Celanese Sales Netherlands B.V.	Netherlands
Celanese Sales Rus gAG	Russia
Celanese Sales UK Limited	United Kingdom
Celanese Sales U.S. Ltd.	Texas
Celanese Services Germany GmbH	Germany
Celanese Services UK Limited	United Kingdom
Celanese Singapore Acetyls Holding PTE. LTD.	Singapore
Celanese Singapore Acetyls Investment PTE. LTD.	Singapore
Celanese Singapore Chemical Holding PTE. LTD.	Singapore
Celanese Singapore Holdings S.à r.l.	Luxembourg
Celanese Singapore Investment PTE. LTD.	Singapore
Celanese Singapore PTE. LTD.	Singapore
Celanese Singapore VAM PTE. LTD.	Singapore

Celanese Singapore Emulsions PTE. LTD.	Singapore
Celanese (Thailand) Limited	Thailand
Celanese US Holdings LLC	Delaware
Celanese Ventas Mexico S. de R.L. de C.V.	Mexico
Celtran, Inc.	Delaware
Celwood Insurance Company	Vermont
CELX Investments S.à r.l.	Luxembourg
CEMX Holdings LLC	Delaware
CNA Holdings LLC	Delaware
Elwood C.V.	Netherlands
Elwood Limited	Bermuda
FKAT LLC	Delaware
Grupo Celanese, S. de R.L. de C.V.	Mexico
Holding Softer America S.A. de C.V	Mexico
HNA Acquisition ULC	Canada
Infraserv Verwaltungs GmbH	Germany
KEP Americas Engineering Plastics, LLC	Delaware
KEP Europe GmbH	Germany
Lower Tier Partnership Netherlands C.V.	Netherlands
Nutrinova France S.à r.l†	France
Polymia S.r.l.	Italy
Pozzi Plast S.r.l.	Italy
PT Celanese Indonesia Operations	Indonesia
Results Based Sustainability, LLC	Georgia
RIOMAVA GmbH	Germany
Servicios Acetato Mexico S. de R.L. de C.V.	Mexico
Servicios Corporativos Celanese S. de R.L. de C.V.	Mexico
So.F.teR Brasil Compostos Termoplasticos Ltda.	Brazil
So.F.teR Deutschland GmbH	Germany
So.F.teR. Holding USA, Inc.	Delaware
So.F.teR. S.r.l.	Italy
So.F.teR. US, Inc.	Delaware
Tenedora Tercera de Toluca S. de R.L. de C.V.	Mexico
Ticona Fortron Inc.	Delaware
Ticona LLC	Delaware
Ticona Polymers, Inc.	Delaware
Ticona Polymers Ltda.	Brazil
Aggregate Ownership of 50% or less
CTE Petrochemicals Co.1	Cayman Islands
Fairway Methanol LLC1	Delaware
Fortron Industries, LLC1	North Carolina
InfraServ GmbH & Co. Gendorf KG2	Germany
Infraserv GmbH & Co. Hoechst KG3	Germany
InfraServ GmbH & Co. Knapsack KG4	Germany
InfraServ GmbH & Co. Wiesbaden KG5	Germany
Korea Engineering Plastics Co., Ltd.1	Korea
Kunming Cellulose Fibers Company, Limited6	China
National Methanol Company7	Saudi Arabia
Nantong Cellulose Fibers Company, Limited8	China

Polyplastics Company, Ltd.9	Japan
Zhuhai Cellulose Fibers Company, Limited6	China

1	Aggregate ownership is 50.00%
2	Aggregate ownership is 39.00%
3	Aggregate ownership is 32.43%
4	Aggregate ownership is 27.00%
5	Aggregate ownership is 7.90%
6	Aggregate ownership is 30.00%
7	Aggregate ownership is 25.00%
8	Aggregate ownership is 30.68%
9	Aggregate ownership is 45.00%
†	In liquidation

EX-23.1

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

The Board of Directors and Stockholders

Celanese Corporation:

We consent to the incorporation by reference in the registration statements on Form S-8 (Nos. 333-122789, 333-128048, 333-158734, 333-158736, 333-166358, 333-180932, and 333-193836) and on Form S-3 (No. 333-216005) of Celanese Corporation (the Company) of our report dated February 9, 2018, with respect to the consolidated balance sheets of the Company as of December 31, 2017 and 2016, and the related consolidated statements of operations, comprehensive income (loss), equity, and cash flows for each of the years in the three-year period ended December 31, 2017, and the effectiveness of internal control over financial reporting as of December 31, 2017, which report appears in the December 31, 2017 annual report on Form 10-K of the Company.

/s/ KPMG LLP

Dallas, Texas

February 9, 2018

EX-23.2

Exhibit 23.2

Consent of Independent Registered Public Accounting Firm

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (No. 333-216005) and Form S-8 (Nos. 333-122789, 333-128048, 333-158734, 333-158736, 333-166358, 333-180932 and 333-193836) of Celanese Corporation of our report dated February 9, 2018, relating to the financial statements of CTE Petrochemicals Company which appear in this Annual Report on Form 10-K of Celanese Corporation.

/s/ BDO USA, LLP

Dallas, Texas

February 9, 2018

EX-23.3

Exhibit 23.3

Consent of Independent Registered Public Accounting Firm

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (No. 333-216005) and Form S-8 (Nos. 333-122789, 333-128048, 333-158734, 333-158736, 333-166358, 333-180932 and 333-193836) of Celanese Corporation of our report dated February 10, 2017, relating to the financial statements of National Methanol Company (Ibn Sina) as of December 31, 2016 and 2015 and for each of the three years in the period ended December 31, 2016, which is incorporated by reference in this Annual Report on Form 10-K of Celanese Corporation.

For BDO Dr. Mohamed Al-Amri & Co.

/s/ Gihad M. Al-Amri

Certified Public Accountant

Registration No. 362

Dammam, Saudi Arabia

February 9, 2018

EX-23.4

Exhibit 23.4

Consent of Independent Registered Public Accounting Firm

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (No. 333-216005) and Form S-8 (Nos. 333-122789, 333-128048, 333-158734, 333-158736, 333-166358, 333-180932 and 333-193836) of Celanese Corporation of our report dated February 9, 2018, relating to the financial statements of National Methanol Company (Ibn Sina) as of December 31, 2017 and 2016 and each of the years in the two year period ended December 31, 2017, which appear in this Annual Report on Form 10-K of Celanese Corporation.

For BDO Dr. Mohamed Al-Amri & Co.

/s/ Gihad M. Al-Amri

Certified Public Accountant

Registration No. 362

Dammam, Saudi Arabia

February 9, 2018

EX-31.1

Exhibit 31.1

CERTIFICATION

PURSUANT TO 17 CFR 240.13a-14

PROMULGATED UNDER

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Mark C. Rohr, certify that:

1. I have reviewed this annual report on Form 10-K of Celanese Corporation;

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

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

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

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

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

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

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

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

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

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

/s/  MARK C. ROHR

Mark C. Rohr

Chairman of the Board of Directors and

Chief Executive Officer

Date: February 9, 2018

EX-31.2

Exhibit 31.2

CERTIFICATION

PURSUANT TO 17 CFR 240.13a-14

PROMULGATED UNDER

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Kevin S. Oliver, Acting Chief Financial Officer, certify that:

1. I have reviewed this annual report on Form 10-K of Celanese Corporation;

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

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

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

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

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

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

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

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

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

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

/s/  KEVIN S. OLIVER

Kevin S. Oliver

Acting Chief Financial Officer (Person performing the functions of Principal Financial Officer)

Date: February 9, 2018

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Celanese Corporation (the "Company") on Form 10-K for the period ending December 31, 2017 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Mark C. Rohr, Chairman of the Board of Directors and Chief Executive Officer of the Company, hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

1. The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

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

/s/  MARK C. ROHR

Mark C. Rohr

Chairman of the Board of Directors and

Chief Executive Officer

Date: February 9, 2018

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Celanese Corporation (the "Company") on Form 10-K for the period ending December 31, 2017 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Kevin S. Oliver, Acting Chief Financial Officer and Chief Accounting Officer of the Company, hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

1. The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

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

/s/  KEVIN S. OLIVER

Kevin S. Oliver

Acting Chief Financial Officer and Chief Accounting Officer (Person performing the functions of Principal Financial Officer)

Date: February 9, 2018

EX-99.2

Exhibit 99.2

CTE PETROCHEMICALS COMPANY

FINANCIAL STATEMENTS

Index to Financial Statements

	PAGE
Independent Auditor's Report	2
Statements of Operations for the years ended December 31, 2017, 2016 and 2015	3
Statements of Comprehensive Income (Loss) for the years ended December 31, 2017, 2016 and 2015	4
Balance Sheets as of December 31, 2017 and 2016	5
Statements of Partners' Capital for the years ended December 31, 2017, 2016 and 2015	6
Statements of Cash Flows for the years ended December 31, 2017, 2016 and 2015	7
Notes to Financial Statements	8

1

INDEPENDENT AUDITOR'S REPORT

To the Board of Directors and Partners of

CTE Petrochemicals Company

Cayman Islands, British West Indies

We have audited the accompanying financial statements of CTE Petrochemicals Company, which comprise the balance sheets as of December 31, 2017 and 2016, and the related statements of operations, comprehensive income (loss), partners' capital, and cash flows for each of the three years in the period ended December 31, 2017, and the related notes to the financial statements.

Management's Responsibility for the Financial Statements

Management is responsible for the preparation and fair presentation of these financial statements in accordance with accounting principles generally accepted in the United States of America; this includes the design, implementation, and maintenance of internal control relevant to the preparation and fair presentation of financial statements that are free from material misstatement, whether due to fraud or error.

Auditor's Responsibility

Our responsibility is to express an opinion on these financial statements based on our audits. We conducted our audits in accordance with auditing standards generally accepted in the United States of America. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free from material misstatement.

An audit involves performing procedures to obtain audit evidence about the amounts and disclosures in the financial statements. The procedures selected depend on the auditor's judgment, including the assessment of the risks of material misstatement of the financial statements, whether due to fraud or error. In making those risk assessments, the auditor considers internal control relevant to the entity's preparation and fair presentation of the financial statements in order to design audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the entity's internal control. Accordingly, we express no such opinion. An audit also includes evaluating the appropriateness of accounting policies used and the reasonableness of significant accounting estimates made by management, as well as evaluating the overall presentation of the financial statements.

We believe that the audit evidence we have obtained is sufficient and appropriate to provide a basis for our audit opinion.

Opinion

In our opinion, the financial statements referred to above present fairly, in all material respects, the financial position of CTE Petrochemicals Company as of December 31, 2017 and 2016, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2017 in accordance with accounting principles generally accepted in the United States of America.

/s/ BDO USA, LLP

Dallas, Texas

February 9, 2018

2

CTE PETROCHEMICALS COMPANY

STATEMENTS OF OPERATIONS

	Year Ended December 31,
	2017			2016			2015
	(In $ thousands)
Equity in net earnings of Ibn Sina	$	123,762		$	75,696		$	143,140
Administrative expenses	(61		)	(67		)	(53		)
Withholding tax expense	—			(2,096		)	(8,847		)
Net earnings	$	123,701		$	73,533		$	134,240

See the accompanying notes to the financial statements.

3

CTE PETROCHEMICALS COMPANY

STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

	Year Ended December 31,
	2017		2016		2015
	(In $ thousands)
Net earnings	$	123,701	$	73,533	$	134,240
Other comprehensive income (loss), net of tax
Pension and postretirement benefits	2,351		11,113		1,171
Total other comprehensive income (loss), net of tax	2,351		11,113		1,171
Total comprehensive income, net of tax	$	126,052	$	84,646	$	135,411

See the accompanying notes to the financial statements.

4

CTE PETROCHEMICALS COMPANY

BALANCE SHEETS

	As of December 31,
	2017		2016
	(In $ thousands)
Assets
Current assets
Cash	$	18	$	12
Contributions receivable	7,079		4,101
Total current assets	7,097		4,113
Investment in Ibn Sina	294,456		168,343
Total assets	$	301,553	$	172,456
Liabilities and Partners' Capital
Current liabilities
Accrued liabilities	$	65	$	53
Dividends payable	7,079		4,101
Total current liabilities	7,144		4,154
Partners' capital	294,409		168,302
Total liabilities and partners' capital	$	301,553	$	172,456

See the accompanying notes to the financial statements

5

CTE PETROCHEMICALS COMPANY

STATEMENTS OF PARTNERS' CAPITAL

	2017						2016									2015
	Texas Eastern Arabian Ltd.		Elwood Limited		Total		Texas Eastern Arabian Ltd.			Elwood Limited			Total			Texas Eastern Arabian Ltd.			Elwood Limited			Total
	(In $ thousands)
Partners' Capital
Balance as of the beginning of the year	$	40,496	$	124,475	$	164,971	$	30,422		$	100,827		$	131,249		$	62,289		$	125,781		$	188,070
Net earnings	57,007		66,694		123,701		36,767			36,766			73,533			67,120			67,120			134,240
Net dividends	—		—		—		(26,693		)	(13,118		)	(39,811		)	(98,987		)	(92,074		)	(191,061		)
Contributions from partners	28		27		55		—			—			—			—			—			—
Balance as of the end of the year	97,531		191,196		288,727		40,496			124,475			164,971			30,422			100,827			131,249
Accumulated Other Comprehensive Income (Loss), Net
Balance as of the beginning of the year	1,665		1,666		3,331		(3,891		)	(3,891		)	(7,782		)	(4,476		)	(4,477		)	(8,953		)
Pension and postretirement benefits	823		1,528		2,351		5,556			5,557			11,113			585			586			1,171
Balance as of the end of the year	2,488		3,194		5,682		1,665			1,666			3,331			(3,891		)	(3,891		)	(7,782		)
Total Partners' Capital	$	100,019	$	194,390	$	294,409	$	42,161		$	126,141		$	168,302		$	26,531		$	96,936		$	123,467

See the accompanying notes to the financial statements.

6

CTE PETROCHEMICALS COMPANY

STATEMENTS OF CASH FLOWS

	Year Ended December 31,
	2017			2016			2015
	(In $ thousands)
Operating activities
Net earnings	$	123,701		$	73,533		$	134,240
Adjustments to reconcile net earnings to net cash provided by operating activities:
Equity in net earnings of Ibn Sina	(123,762		)	(75,696		)	(143,140		)
Dividends received	—			41,917			176,939
Accrued liabilities	12			5			3
Net cash provided by operating activities	(49		)	39,759			168,042
Financing activities
Dividends paid	—			(39,811		)	(191,061		)
Contributions from partners	55			—			—
Net cash used in financing activities	55			(39,811		)	(191,061		)
Net change in cash	6			(52		)	(23,019		)
Cash at beginning of year	12			64			23,083
Cash at end of year	$	18		$	12		$	64

See the accompanying notes to the financial statements.

7

CTE PETROCHEMICALS COMPANY

NOTES TO FINANCIAL STATEMENTS

1. Description of the Company and Basis of Presentation

CTE Petrochemicals Company ("CTE" or the "Company") is a common general partnership (the "Partnership") which was formedon January 27, 1981 pursuant to the laws of the Cayman Islands, British West Indies. The original partners, Celanese Arabian Inc. ("Celanese Arabian")and Texas Eastern Arabian Ltd. ("Texas Eastern"),a wholly owned subsidiary of Duke Energy Corporation ("Duke"), each acquired an equal ownership interest in CTE. Through a series of transactions, Elwood Limited ("Elwood"), a wholly owned subsidiary of Celanese Corporation ("Celanese"),acquired Celanese Arabian's original interest in CTE, and Celanese and Duke continue to have an equal ownership interest through their respective subsidiaries, Elwood and Texas Eastern (the "Partners").

CTE's primary asset is its 50% investment in National Methanol Company ("Ibn Sina"). Ibn Sina, a Saudi limited liability company registered under the laws of Saudi Arabia, is owned equally by CTE and Saudi Basic Industries Corporation ("SABIC"), a privately-held Saudi Arabian joint stock company. Ibn Sina was formed in 1981 and is in the business of operating a petrochemical complex which produces methanol and methyl tertiary butyl ether.

On April 1, 2010, Elwood, Texas Eastern and SABIC expanded the scope of Ibn Sinato include the creation of a polyacetal ("POM") production facility and extended the term of the joint venture to 2032. The capital required to build the POM plant is funded equally by SABIC and CTE. Elwood and Texas Eastern provide 65% and 35%, respectively, of the POM funding requirements of CTE. Upon the POM plant becoming commercially operational, which occurred in October 2017, CTE's respective earnings are split 65% and 35% to Elwood and Texas Eastern, respectively. The partners' equal ownership percentage in CTE remains unchanged. Elwood and Texas Eastern will continue to share the power to direct the activities that most significantly impact the Company's economic performance. SABIC will continue to have 50% ownership in Ibn Sina, including its respective share of profits and losses.

Basis of Presentation

The financial statements were prepared in accordance with accounting principles generally accepted in the United States of America ("US GAAP") for all periods presented.

2. Summary of Accounting Policies

Estimates and Assumptions

The preparation of financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and revenues and expenses. These estimates, based on best available information at the time, could differ from actual results.

Investment in Ibn Sina

The Company accounts for its investment in Ibn Sina using the equity method of accounting as it has the ability to exercise significant influence over operating and financial policies of Ibn Sina, but does not exercise control. Under the equity method, the investment, originally recorded at cost, is adjusted to recognize the Company's share in net earnings or losses of Ibn Sina and reduced by dividends received.

The Company assesses the recoverability of the carrying value of its investment whenever events or changes in circumstances indicate a loss in value that is other than a temporary decline. A loss in value of an equity-method investment which is other than a temporary decline will be recognized as the difference between the carrying amount of the investment and its fair value, and such loss, if any, would be charged to earnings. No such losses have been recognized.

8

Dividends

The Company records dividends when received as reduction of its investment. Historically, Ibn Sina has distributed a substantial portion of the after tax earnings to its partners. Typically, CTE remits the dividends to its partners, Elwood and Texas Eastern, simultaneously when received from Ibn Sina. As of December 31, 2017 and 2016, POM related expenditures had been incurred at Ibn Sina that created an imbalance in the funding requirements of the Partners. Based on the economic sharing ratios of the Partners (Note 1), $7.1 million and $4.1 million, as of December 31, 2017 and 2016, respectively, was owed by Elwood to CTE and, likewise, from CTE to Texas Eastern. These amounts are reflected as Contributions receivable and Dividends payable, respectively, on the Balance Sheet and are noncash activities.

Accumulated Other Comprehensive Income (Loss)

Accumulated other comprehensive income (loss) is the Company's share of Ibn Sina's gains or losses for pension and postretirement benefits that are not recognized immediately as a component of net periodic pension cost.

3. Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2014-09, Revenue from Contracts with Customers ("ASU 2014-09"). ASU 2014-09 supersedes the revenue recognition requirements of FASB Accounting Standards Codification ("ASC") Topic 605, Revenue Recognition and most industry-specific guidance throughout the ASC, resulting in the creation of FASB ASC Topic 606, Revenue from Contracts with Customers. ASU 2014-09 requires entities to recognize revenue in a way that depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This ASU provides alternative methods of adoption. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers, Deferral of the Effective Date ("ASU 2015-14"). ASU 2015-14 defers the effective date of ASU 2014-09 by one year to December 15, 2017 for fiscal years, and interim periods within those years, beginning after that date and permits early adoption of the standard, but not before the original effective date for fiscal years beginning after December 15, 2016. Since that date, the FASB has issued additional ASUs clarifying certain aspects of ASU 2014-09. The core principle of ASU 2014-09 was not changed by the additional guidance. The Company is currently assessing the potential impact of adopting ASU 2014-09 on its financial statements and related disclosures. The adoption will not have a material impact on its consolidated financial statements and related disclosures, as the Company has one source of revenue, the equity earnings of its investee, Ibn Sina, and it will not change the manner or timing of recognizing the equity earnings.

In February 2016, the FASB issued ASU 2016-02, Leases ("ASU 2016-02"). ASU 2016-02 supersedes the lease guidance under FASB Accounting Standards Codification ("ASC") Topic 840, Leases, resulting in the creation of FASB ASC Topic 842, Leases. ASU 2016-02 requires a lessee to recognize in the statement of financial position a liability to make lease payments and a right-of-use asset representing its right to use the underlying asset for the lease term for both finance and operating leases. This ASU is effective for fiscal years, and interim periods within those years, beginning after December 15, 2018. Early adoption is permitted. The Company is currently assessing the potential impact of adopting ASU 2016-02 on its financial statements and related disclosures. The Company currently does not hold any leases directly. However, Ibn Sina has leases and the expense recognition of these leases impacts the equity earnings of the Company.

In August 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments ("ASU 2016-15"). ASU 2016-15 clarifies the presentation and classification of certain cash receipts and cash payments in the statement of cash flows. This ASU is effective for fiscal years, and interim periods within those years, beginning after December 15, 2017. Early adoption is permitted. The Company currently does not expect the adoption of ASU 2016-15 to have a material impact on its consolidated financial statements and related disclosures as the classification of dividends received from Ibn Sina on the Statement of Cash Flows is not expected to change.

9

4. Investment in Ibn Sina

The following are summarized US GAAP financial statement results of Ibn Sina as of and for the years ended December 31:

	Year Ended December 31,
	2017		2016		2015
	(In $ thousands)
Total Assets	$	1,292,770	$	880,660	$	738,011
Debt	373,874		379,222		269,495
Total Liabilities	669,902		549,387		504,046
Net Sales	783,382		581,274		763,110
Operating Income	295,997		189,576		356,802
Net Income	270,469		177,320		318,087

The laws of Saudi Arabia require different allocations of income taxes to capital balances based upon the respective partner's country of domicile. Accordingly, CTE's percentage of Ibn Sina's net income in equity is not proportioned to its ownership percentages.

5. Withholding Taxes

The financial statements reflect no provision or liability for income taxes because the Company's financial results are included in the income tax returns of the Partners for the years ended December 31, 2017, 2016 and 2015. The Company incurs withholding tax from the Saudi Arabian government at a rate of 5% on dividends received from its investment in Ibn Sina. Withholding taxes are reported as withholding tax expense on the Company's statements of operations when dividends are received. Amounts shown as withholding tax expense were paid to the Saudi Arabian government in the respective periods presented. For the years ended December 31, 2017, 2016 and 2015 taxes paid were $0.0 million, $2.1 million and $8.8 million, respectively.

6. Subsequent Events

Subsequent events were updated through February 9, 2018, the date at which the financial statements were available to be issued.

10

EX-99.3

Exhibit 99.3

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

FINANCIAL STATEMENTS AND INDEPENDENT AUDITOR’S REPORT

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

	Pages
Independent Auditor’s Report	2
Statement of financial position	4
Statement of income	5
Statement of other comprehensive income	6
Statement of changes in equity	7
Statement of cash flows	8
Notes to the financial statements	9-48

1

INDEPENDENT AUDITOR’S REPORT

To the management

National Methanol Company (Ibn Sina)

Al-Jubail, Saudi Arabia

We have audited the accompanying financial statements of National Methanol Company (Ibn Sina), which comprise of statement of financial position as of December 31, 2017 and 2016 and the related statements of income, other comprehensive income, equity and cash flows for the years ended December 31, 2017 and 2016 and the related notes to the financial statements, which, as described in Note 2 to the financial statements, have been prepared in accordance with International Financial Reporting Standards (“IFRS”) as endorsed in the Kingdom of Saudi Arabia (“KSA”).

Management’s Responsibility for the Financial Statements

Management is responsible for the preparation and fair presentation of these financial statements in accordance with the IFRS as endorsed in KSA; this includes the design, implementation, and maintenance of internal control relevant to the preparation and fair presentation of financial statements that are free from material misstatement, whether due to fraud or error.

Auditor’s Responsibility

Our responsibility is to express an opinion on these financial statements based on our audits. We conducted our audits in accordance with auditing standards generally accepted in the United States of America. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free from material misstatement.

An audit involves performing procedures to obtain audit evidence about the amounts and disclosures in the financial statements. The procedures selected depend on the auditor’s judgment, including the assessment of the risks of material misstatement of the financial statements, whether due to fraud or error. In making those risk assessments, the auditor considers internal control relevant to the entity’s preparation and fair presentation of the financial statements in order to design audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the entity’s internal control. Accordingly, we express no such opinion. An audit also includes evaluating the appropriateness of accounting policies used and the reasonableness of significant accounting estimates made by management, as well as evaluating the overall presentation of the financial statements.

We believe that the audit evidence we have obtained is sufficient and appropriate to provide a basis for our audit opinion.

Unqualified Audit Opinion

In our opinion, the financial statements referred to above present fairly, in all material respects, the financial position, results of its operations and its cash flows as of and for the years ended December 31, 2017 and 2016, in accordance with IFRS as endorsed in KSA.

2

Emphasis of Matter

As discussed in Note 2 and Note 30 to the accompanying financial statements, National Methanol Company (Ibn Sina) has prepared its financial statements in accordance with IFRS as endorsed in KSA, which differs from accounting principles generally accepted in the United States of America. Information relating to the nature and effect of such differences is presented in Note 29 to the financial statements.

Our opinion is not modified with respect to this matter.

For BDO Dr. Mohamed Al-Amri & Co.

/s/ Gihad M. Al-Amri

Certified Public Accountant

Registration No. 362

Dammam, Saudi Arabia

February 09, 2018

3

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

STATEMENT OF FINANCIAL POSITION

AS OF DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

	Notes	December 31, 2017	December 31, 2016	January 1, 2016
			(Note 6)	(Note 6)
Assets
Non-current assets
Property, plant and equipment	7	2,083,730	2,224,444	2,496,214
Intangible assets	8	77,664	24,868	26,520
Deferred tax asset	21	23,542	20,328	23,146
Other non-current assets	9	28,962	26,183	19,621
		2,213,898	2,295,823	2,565,501
Current assets
Inventories	10	173,662	101,119	112,028
Trade and other receivables	11	334,923	268,086	230,763
Prepayments and other current assets	12	81,200	93,270	87,147
Cash and cash equivalents	13	1,099,885	283,070	114,903
		1,689,670	745,545	544,841
Total assets		3,903,568	3,041,368	3,110,342
Equity and liabilities
Equity
Share capital	14	558,000	558,000	558,000
Statutory reserve	15	279,000	279,000	279,000
Other reserves	15	7,114	11,417	-
Retained earnings / (accumulated losses)		557,944	(179,683)	176,262
Total equity		1,402,058	668,734	1,013,262
Non-current liabilities
Long-term borrowings	16	1,214,171	1,239,460	1,011,718
Employees benefits	17	196,010	170,917	181,006
Other non-current liabilities	18	361,008	330,487	298,699
		1,771,189	1,740,864	1,491,423
Current liabilities
Current portion of long-term borrowings	16	187,858	187,632	173
Trade and other payables	19	211,438	153,280	117,909
Accrued and other current liabilities	20	266,731	281,012	459,110
Zakat and income tax payable	21	64,294	9,846	28,465
		730,321	631,770	605,657
Total liabilities		2,501,510	2,372,634	2,097,080
Total equity and liabilities		3,903,568	3,041,368	3,110,342

The accompanying notes from 1 to 32 form an integral part of these financial statements.

4

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

STATEMENT OF INCOME

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

	Notes	For the year ended December 31, 2017	For the year ended December 31, 2016
			(Note 6)
Sales		2,937,684	2,179,776
Cost of sales	22	(1,987,603)	(1,963,301)
Gross profit		950,081	216,475
General and administrative expenses	22	(107,317)	(107,702)
Selling and distribution expenses		(9,670)	(10,665)
Operating income		833,094	98,108
Financial income	22	18,900	3,624
Finance cost	22	(7,647)	(9,274)
Other income		6,643	3,383
Income before zakat and income tax		850,990	95,841
Zakat	21	(13,796)	(1,940)
Income tax	21	(99,567)	(80,111)
Net income for the year		737,627	13,790

The accompanying notes from 1 to 32 form an integral part of these financial statements.

5

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

STATEMENT OF OTHER COMPREHENSIVE INCOME

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

	For the year ended December 31, 2017	For the year ended December 31, 2016
		(Note 6)
Net income for the year	737,627	13,790
Other comprehensive (loss) / income
Items that will not be reclassified to income
Re-measurement (loss)/gain on defined benefits obligations	(4,303)	11,417
Total comprehensive income for the year	733,324	25,207

The accompanying notes from 1 to 32 form an integral part of these financial statements.

6

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

STATEMENT OF CHANGES IN EQUITY

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

	Capital	Income before zakat/tax			Zakat/tax			Net income			Statutory reserve			Other reserves (Note 15)			Retained earnings
		Total	Saudi (SABIC) portion	Foreign (CTE) portion	Total	Saudi (SABIC) portion	Foreign (CTE) portion	Total	Saudi (SABIC) portion	Foreign (CTE) portion	Total	Saudi (SABIC) portion	Foreign (CTE) portion	Total	Saudi (SABIC) portion	Foreign (CTE) portion	Total	Saudi (SABIC) portion	Foreign (CTE) portion
At January 1, 2016	558,000	-	-	-	-	-	-	-	-	-	279,000	139,500	139,500	-	-	-	176,262	72,668	103,594
Income for the year	-	95,841	47,921	47,920	(82,051)	(1,940)	(80,111)	13,790	45,981	(32,191)	-	-	-	-	-	-	13,790	45,981	(32,191)
Zakat/tax with-held	-	-	-	-	77,069	10,855	66,214	-	-	-	-	-	-	-	-	-	77,069	10,855	66,214
Dividends	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	(446,804)	(223,402)	(223,402)
Other comprehensive income	-	-	-	-	-	-	-	-	-	-	-	-	-	11,417	5,708	5,709	-	-	-
At December 31, 2016	558,000	95,841	47,921	47,920	(4,982)	8,915	(13,897)	13,790	45,981	(32,191)	279,000	139,500	139,500	11,417	5,708	5,709	(179,683)	(93,898)	(85,785)
At January 1, 2017	558,000	-	-	-	-	-	-	-	-	-	279,000	139,500	139,500	11,417	5,708	5,709	(179,683)	(93,898)	(85,785)
Income for the year	-	850,990	425,495	425,495	(113,363)	(13,796)	(99,567)	737,627	411,699	325,928	-	-	-	-	-	-	737,627	411,699	325,928
Other comprehensive income	-	-	-	-	-	-	-	-	-	-	-	-	-	(4,303)	(2,151)	(2,152)	-	-	-
At December 31, 2017	558,000	850,990	425,495	425,495	(113,363)	(13,796)	(99,567)	737,627	411,699	325,928	279,000	139,500	139,500	7,114	3,557	3,557	557,944	317,801	240,143

The accompanying notes from 1 to 32 form an integral part of these financial statements.

7

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

STATEMENT OF CASH FLOWS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

	For the year ended December 31, 2017	For the year ended December 31, 2016
		(Note 6)
Cash flows from operating activities
Income before zakat and tax	850,990	95,841
Adjustment to reconcile profit to net cash provided by operating activities:
Provision for slow moving and obsolete inventory items	2,028	2,354
Depreciation of property, plant and equipment	123,772	115,279
Amortization of intangible assets	4,487	4,277
Impairment of property, plant and equipment	274,249	669,007
Employees benefit expense	26,180	27,082
Finance income	(18,900)	(3,624)
Finance cost	7,647	9,274
Embedded finance lease and amortization of transaction cost	(92)	1,947
	1,270,361	921,437
Changes in operating assets and liabilities
Other non-current assets	6,117	2,929
Inventories	(74,571)	8,555
Trade and other receivables	(66,837)	(37,323)
Prepayments and other current assets	12,070	(4,237)
Other non-current liabilities	30,521	31,788
Trade and other payables	58,158	35,371
Accrued and other liabilities	(14,281)	(178,098)
Cash generated from operations	1,221,538	780,422
Finance cost paid	(7,647)	(9,274)
Employees benefit paid	(5,390)	(25,754)
Zakat and income tax paid	(60,148)	(99,833)
Net cash generated from operating activities	1,148,353	645,561
Cash flows from investing activities:
Purchase of property, plant and equipment	(266,203)	(518,908)
Purchase of intangible assets	(57,283)	(2,625)
Mark-up received	18,900	3,624
Net cash used in investing activities	(304,586)	(517,909)
Cash flows from financing activities
Proceeds from long-term loans	162,750	410,250
Repayment of long-term loans	(189,702)	-
Dividends paid	-	(369,735)
Net cash (used in) / generated from financing activities	(26,952)	40,515
Net increase in cash and cash equivalents	816,815	168,167
Cash and cash equivalents at the beginning of the period	283,070	114,903
Cash and cash equivalents at the end of the period	1,099,885	283,070

The accompanying notes from 1 to 32 form an integral part of these financial statements.

8

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

1Corporate information

National Methanol Company (“Ibn Sina”) (“the Company”) is a Saudi limited liability company registered under Commercial Registration No. 2055000779 dated 19 Rajab 1401H (May 23, 1981).

The Company is owned equally by Saudi Basic Industries Corporation (“SABIC”), a Saudi Arabian joint stock company and CTE Petrochemicals Company (“CTE”), a partnership registered in Cayman Islands, British West Indies (collectively “the Partners”). CTE is equally owned by Elwood Limited, a Bermuda Corporation, and Texas Eastern Arabian Ltd., a Bermuda Corporation.

The Company’s principal business activity is to operate a petrochemical complex at Al-Jubail Industrial City, which produces Methanol and Methy1 Tertiary Butyl Ether (“MTBE”). The Company’s Methanol and MTBE plants commenced commercial operations on November 1, 1984 and July 1, 1994, respectively. SABIC distributes and markets Methanol and MTBE products.

During 2010, the partners agreed to expand the Company’s activities by establishing a plant for the manufacturing of polyoxymethylene (“POM”) which commenced commercial operations on January 2, 2018. SABIC and Celanese Corporation have marketing rights to POM product.

The Company's registered office is in Al-Jubail Industrial City in the Kingdom of Saudi Arabia.

2    Basis of preparation

2.1    First-time adoption of IFRS

For all years up to and including the year ended December 31, 2016, the Company prepared its financial statements in accordance with the accounting standards promulgated by the Saudi Organization for Certified Public Accountants (SOCPA). These financial statements for the year ended December 31, 2017 are the first financial statements the Company has prepared in accordance with IFRS as endorsed in the Kingdom of Saudi Arabia.

Refer to note 6 for information on the first time adoption of IFRS by the Company.

2.2     Statement of compliance

These financial statements have been prepared in accordance with International Financial Reporting Standards (“IFRS”) as endorsed in the Kingdom of Saudi Arabia and other standards and pronouncements that are issued by the Saudi Organization for Certified Public Accountants (“SOCPA”) (collectively referred to as “IFRS as endorsed in KSA”).

2.3     Historical cost convention

These financial statements are prepared under the historical cost convention, except for certain employees and other post-employment benefits in which actuarial present value calculations are used.

The financial statements are presented in Saudi Riyals (SR), which is also the functional currency of the Company.

All values are rounded to the nearest thousand (SR “000”), except when otherwise indicated.

3    Significant accounting estimates, assumptions and judgments

The preparation of the Company’s financial statements requires management to make judgments, estimates and assumptions that affect the reported amounts of revenues, expenses, assets and liabilities, and the disclosure of contingent liabilities, at the reporting date. However, uncertainty about these assumptions and estimates could result in outcomes that could require a material adjustment to the carrying amount of the asset or liability affected in the future. These estimates and assumptions are based upon experience and various other factors that are believed to be reasonable under the circumstances and are used to judge the carrying values of assets and liabilities that are not readily available from other sources. The estimates and underlying assumptions are reviewed on an ongoing basis. Revisions to accounting estimates are recognized in the period in which the estimates are revised or in the revision period and future periods if the changed estimates affect both current and future periods.

The key assumptions concerning the future and other key sources of estimation uncertainty at the reporting date, that have a significant risk of causing a material differences in the carrying amounts of assets and liabilities within the next financial period, are presented below.

9

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

3    Significant accounting estimates, assumptions and judgments (continued)

The Company used these assumptions and estimates on the basis available when the financial statements were prepared. However, existing circumstances and assumptions about future developments may change due to market changes or circumstances arising that are beyond the control of the Company. Such changes are reflected in the assumptions when they occur.

3.1.1    Impairment of non-financial assets

Impairment exists when the carrying value of an asset or Cash Generating Unit ("CGU") exceeds its recoverable amount, which is the higher of its fair value less costs of disposal and its value in use. The fair value less costs of disposal calculation is based on available data from binding sales transactions, conducted at arm’s length, for similar assets or observable market prices less incremental costs for disposing off the asset. The value in use calculation is based on a Discounted Cash Flow ("DCF") model. The cash flows are derived from the budget and do not include restructuring activities that the Company is not yet committed to or significant future investments that will enhance the performance of the CGU being tested. The recoverable amount is sensitive to the discount rate used for the DCF model as well as the expected future net cash-inflows and the growth rate used for extrapolation purposes.

3.1.2    Provisions

By their nature, provisions are dependent upon estimates and assessments whether the criteria for recognition have been met, including estimates of the probability of cash outflows. Management’s estimates related to provisions for environmental matters are based on the nature and seriousness of the contamination, as well as on the technology required for clean up. Provisions for litigation are based on an estimate of the costs, taking into account legal advice and other information presently available. Provisions for termination benefits and exit costs, if any, also involve management’s judgment in estimating the expected cash outflows for severance payments and site closures or other exit costs. Provisions for uncertain liabilities involve management’s best estimate of whether cash outflows are probable.

3.1.3    Long-term assumptions for employees’ benefits

Post-employment defined benefits, end-of-service benefits and indemnity payments represent obligations that will be settled in the future and require assumptions to project obligations and fair values of plan assets, if any. Management is required to make further assumptions regarding variables such as discount rates, rate of salary increase, mortality rates, employment turnover and future healthcare costs. Periodically, management of the Company consults with external actuaries regarding these assumptions. Changes in key assumptions can have a significant impact on the projected benefit obligations and/or periodic employee defined benefit costs incurred.

3.2     Critical judgments in applying accounting standards

In addition to the application of the judgment in the above mentioned estimates and assumptions, the following critical judgments have the most significant effect on the amounts recognized in the financial statements:

3.2.1 Component parts of property, plant and equipment

The Company’s assets, classified within property, plant and equipment, are depreciated on a straight-line basis over their economic useful lives. When determining the economic useful life of an asset, it is broken down into significant component parts such that each significant component part is depreciated separately. Judgment is required in ascertaining the significant components of a larger asset, and while defining the significance of a component, management considers quantitative materiality of the component part as well as qualitative factors such as difference in useful life as compared to related asset, its pattern of consumption and its replacement cycle/maintenance schedule.

4    Standards issued but not yet effective

The IFRS standards and interpretations that are issued, but not yet effective, up to the date of issuance of the Company’s financial statements are disclosed below. The Company intends to adopt these standards when they become effective.

IFRS 9 Financial Instruments

“IFRS 9 - Financial Instruments” (“IFRS 9”), addresses the classification, measurement and derecognition of financial assets and financial liabilities, introduces new rules for hedge accounting and a new impairment model for financial assets. The standard is effective from January 1, 2018 and allows early adoption.

10

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

4    Standards issued but not yet effective (continued)

IFRS 9 Financial Instruments (continued)

The Company will adopt the new standard on the effective date. The Company is currently assessing the impacts of the measurement and classification of financial assets.

IFRS 15 Revenue from Contracts with Customers

IFRS 15 will replace “IAS 18 – Revenue” which covers revenue arising from the sale of goods and the rendering of services and “IAS 11 - Construction Contracts” which covers construction contracts. The new standard is based on the principle that revenue is recognized when control of a good or service transfers to a customer. The standard permits either a full retrospective or a modified retrospective approach for the adoption. The new standard is effective for first periods within annual reporting periods beginning on or after January 1, 2018.

IFRS 16 Leases

IFRS 16 will replace:

• IAS 17 – ‘Leases’

• IFRIC 4 – ‘Whether an arrangement contains a lease’

• SIC 15 – ‘Operating leases – Incentives’

• SIC 27 – ‘Evaluating the substance of transactions involving the legal form of a lease’

Under IAS 17, lessees are required to make a distinction between a finance lease (on balance sheet) and an operating lease (off balance sheet). IFRS 16 now requires lessees to recognize a lease liability reflecting future lease payments and a ‘right-of-use asset’ for all lease contracts apart from an optional exemption for certain short-term leases.

In addition, under the new lease standard, a contract is, or contains, a lease if the contract conveys the right to control the use of an identified asset for a period of time in exchange for consideration.

IFRS 16 is effective for annual periods beginning on or after January 1, 2019, early application is permitted and must be disclosed. The Company will adopt the new standard on the effective date.

IFRIC Interpretation 22 Foreign Currency Transactions and Advance Consideration

The interpretation clarifies that in determining the spot exchange rate to use on initial recognition of the related asset, expense or income (or part of it) on the de-recognition of a non-monetary asset or non-monetary liability relating to advance considerations, the date of the transaction is the date on which an entity initially recognizes the non-monetary asset or non-monetary liability. If there are multiple payments or receipts in advance, then the entity must determine a date of the transactions for each payment or receipt of advance consideration.

The IFRIC is effective for annual periods beginning on or after January 1, 2018. The Company will adopt the new standard on the effective date, and is finalizing its detailed assessment of the impact on the Company’s financial statements.

IFRIC Interpretation 23 - Uncertainty over Income Tax Treatment

The Interpretation addresses the accounting for income taxes when tax treatments involve uncertainty that affects the application of IAS 12 and does not apply to taxes or levies outside the scope of IAS 12, nor does it specifically include requirements relating to interest and penalties associated with uncertain tax treatments.

The Interpretation specifically addresses the following:

• Whether an entity considers uncertain tax treatments separately

• The assumptions an entity makes about the examination of tax treatments by taxation authorities

• How an entity determines taxable results, tax bases, unused tax losses, unused tax credits and tax rates

• How an entity considers changes in facts and circumstances.

The Company must determine whether to consider each uncertain tax treatment separately or together with one or more other uncertain tax treatments. The approach that better predicts the resolution of the uncertainty should be followed. The interpretation is effective for annual reporting periods beginning on or after January 1, 2019, but certain transition reliefs are available. The Company will apply interpretation from its effective date.

11

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

4    Standards issued but not yet effective (continued)

IFRIC Interpretation 23 - Uncertainty over Income Tax Treatment (continued)

Since the Company operates in a complex multinational tax environment, applying this Interpretation may affect its financial statements and the required disclosures. In addition, the Company may need to establish processes and procedures to obtain information that is necessary to apply the Interpretation on a timely basis.

5    Summary of significant accounting policies

Current versus non-current classification

The Company presents assets and liabilities in the statement of financial position based on current/non-current classification. An asset is current when it is:

• Expected to be realized or intended to be sold or consumed in normal operating cycle

• Held primarily for the purpose of trading

• Expected to be realized within twelve months after the reporting year, or

• Cash or cash equivalent unless restricted from being exchanged or used to settle a liability for at least twelve months after the reporting year.

All other assets are classified as non-current.

A liability is current when:

• It is expected to be settled in normal operating cycle

• It is held primarily for the purpose of trading

• It is due to be settled within twelve months after the reporting year, or

• There is no unconditional right to defer the settlement of the liability for at least twelve months after the reporting year

The Company classifies all other liabilities as non-current. Deferred tax assets and liabilities are classified as non-current assets and liabilities.

Property, plant and equipment

Owned assets

Property, plant and equipment are stated at cost, net of accumulated depreciation and accumulated impairment losses, if any. Such costs includes the cost of replacing part of the property, plant and equipment and borrowing costs for long-term construction projects (qualifying assets), if the recognition criteria are met. Where such assets are constructed in-house, their cost includes all amounts necessary to bring the asset to the present condition and location to be ready for intended use by management and excludes all costs such as general and administrative expenses and training costs. Any feasibility study costs are expensed as incurred unless they relate to specifically identifiable asset being constructed in-house and are directly attributable to it. Pre-operating costs during startup period, net of proceeds from sale of trial production, are included as part of cost of the relevant item of property, plant and equipment, provided it is a directly attributable cost which meets the recognition criteria, and only up to the point the asset is in a condition ready for intended use.

When parts of property, plant and equipment are significant in cost in comparison to the total cost of the item, and where such parts/components have a useful life different from other parts and are required to be replaced at different intervals, the Company shall recognize such parts as individual assets with specific useful lives and depreciate them accordingly. Likewise, when a major inspection (turnaround/shutdown, planned or unplanned) is performed, its directly attributable cost is recognized in the carrying amount of the plant and equipment, if the recognition criteria are satisfied. This is recorded as a separate component with a useful life generally equal to the time up to the next scheduled major inspection (turnaround). If the next turnaround occurs prior to the planned date, any existing book value of the previous turnaround is expensed immediately. All other repair and maintenance costs are recognized in statement of income as incurred.

The present value of the expected cost for the decommissioning of an asset after its use is included in the cost of the respective asset if the recognition criteria for a provision are met. The Company will periodically assess the expectation and estimation for the decommissioning liability.

Environment, health, safety and security (EHS&S) related expenditures are capitalized if they meet the recognition criteria, mainly, that such costs are required by prevailing applicable legislation and are required to continue the license to operate or is imposed by the Company’s own mandatory requirements relating to EHS&S. These are capitalized together with the cost of the relevant item of property, plant and equipment to which they relate.

12

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

5    Summary of significant accounting policies (continued)

Property, plant and equipment (continued)

Depreciation is calculated from the date the item of property, plant and equipment are available for its intended use or in respect of self-constructed assets, from the date such assets ready for the intended use.

Depreciation is calculated on a straight-line basis over the useful life of the asset as follows:

Buildings 13-40 years

Plant and equipment 4-50 years

Furniture, fixtures 3-10 years

Vehicles 4-20 years

Capital spares 4-50 years

Catalysts 1.5-20 years

The assets’ residual values, useful lives and methods of depreciation are reviewed, and adjusted prospectively if appropriate, at each financial year–end.

Land and assets under construction, which are not ready for its intended use, are not depreciated.

An item of property, plant and equipment and any significant part initially recognized is de-recognized upon disposal or when no future economic benefits are expected from its use or disposal. Any gain or loss arising on de-recognition of the asset (calculated as the difference between the net disposal proceeds and the carrying amount of the asset) is included in the statement of income when the asset is de-recognized.

An asset’s carrying amount is written down immediately to its recoverable amount if the asset’s carrying amount is greater than its estimated recoverable amount.

Joint ownership and production arrangements

Joint ownership and production arrangements (JOPA) are agreements with another entity wherein the Company contributes to the production and operation of a particular asset or a plant in a specific proportion. The entity which controls and manages all the relevant activities related to the plant (referred to as “the operator”) recognizes the full amount of the asset at cost in its books and depreciates it over the useful life of the asset. The entity which contributes funds for the construction of the plant (referred to as “the non-operator”) recognizes the contribution as a production advance and amortizes it in line with the useful life of the asset. Normal operational and production costs and sales of the related products from such plants are treated in line with various JOPA agreements. For the current agreements in place, the Company is deemed to be the operator and accordingly reflects the full amount of plants in its books.

Lease assets

The determination of whether an arrangement is (or contains) a lease is based on the substance of the arrangement at the inception date. The arrangement is assessed for whether fulfillment of the arrangement is dependent on the use of a specific asset or assets or the arrangement conveys a right to use the asset or assets, even if that right is not explicitly specified in an arrangement. This may indicate existence of a potential embedded lease in a transaction which may prima facie not be in the nature of a lease agreement. All leases, whether an explicit lease agreement or an embedded lease within any other agreements or arrangements, shall be assessed for classification as finance lease or operating lease.

A leased asset will be depreciated over the useful life of the asset. However, if there is no reasonable certainty that the Company will obtain ownership by the end of the lease term, the asset is depreciated over the shorter of the estimated useful life of the asset and the lease term.

Leases in which a significant portion of the risks and rewards of ownership are not transferred to the Company are classified as operating leases. Payments made under operating leases (net of any incentives received from the lessor) are charged to statement of income on a straight-line basis over the period of the lease.

Intangible assets

Intangible assets acquired separately are measured at cost upon initial recognition. Following initial recognition, intangible assets are carried at cost less any accumulated amortization and accumulated impairment losses, if any.

13

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

5    Summary of significant accounting policies (continued)

Intangible assets (continued)

The useful lives of intangible assets are assessed to be either finite or indefinite. Intangible assets with finite lives are amortized over the useful economic life and assessed for impairment whenever there is an indication that the intangible asset may be impaired. The amortization period and the amortization method for an intangible asset with a finite useful life are reviewed at least at each financial year-end. Changes in the expected useful life or the expected pattern of consumption of future economic benefits embodied in the asset, are accounted for by changing the amortization period or method, as appropriate, and are treated as changes in accounting estimates. The amortization expense on intangible assets with finite lives is recognized in the statement of income in the expense category consistent with the function of the intangible asset.

The amortization period for intangible assets with a finite useful life is as follows:

Software, technology, innovation assets and others 3 - 15 years

The useful life of an intangible asset with a definite life is reviewed regularly to determine whether there is any indication that its current life assessment continues to be supportable. If not, the change in useful life assessment is made on a prospective basis. Intangible assets with indefinite useful lives are not amortized, but are tested for impairment annually either individually or at the aggregated CGU level.

Gains or losses arising from de-recognizing an intangible asset are measured as the difference between the net disposal proceeds and the carrying amount of the asset and are recognized in the statement of income when the asset is de-recognized.

Technology and innovation assets

Research costs related to in-house developed software and technology and innovation assets are expensed as incurred. Development expenditures for in-house developed assets are recognized as an intangible asset when the Company can segregate such expenditures distinct from the research costs, and can demonstrate the technical feasibility of completing the intangible asset so that it will be available for use or sale, its intention to complete and its ability to use or sell the asset, how the asset will generate future economic benefits, the availability of resources to complete the asset and the ability to measure reliably the expenditure during development.

Following initial recognition of the development expenditure as an asset, the cost model is applied requiring the asset to be carried at cost less any accumulated amortization and accumulated impairment losses. Amortization of the asset starts when development is complete and the asset is available for use. It is amortized over the period of expected future benefit. During the period of development, the asset is tested for impairment annually. Technology and innovation expenses are recorded in the statement of income under other operating expenses as general and administrative expenses.

Software

Costs associated with maintaining software programs are recognized as an expense as incurred. Development costs that are directly attributable to the design and testing of identifiable and unique software products controlled by the Company are recognized as intangible assets when the following criteria are met:

• it is technically feasible to complete the software so that it will be available for use

• management intends to complete the software and use or sell it

• there is an ability to use or sell the software

• it can be demonstrated how the software will generate probable future economic benefits

• adequate technical, financial and other resources to complete the development and to use or sell the software are available, and

• the expenditure attributable to the software during its development can be reliably measured.

Directly attribute costs that are capitalized as part of the software include employee costs and an appropriate portion of relevant overheads.

Capitalized development costs are recorded as intangible assets and amortized from the point at which the asset is ready for use.

14

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

5    Summary of significant accounting policies (continued)

Impairment of non-financial assets

The Company assesses at each reporting date whether there is an indication that an asset maybe impaired. If any indication exists, or when annual impairment testing for an asset is required, the Company estimates the assets recoverable amount. An asset’s recoverable amount is the higher of an asset’s or CGU’s fair value less costs to sell and its value-in-use and is determined for an individual asset, unless the asset does not generate cash inflows that are largely independent of those from other assets or companies of assets. Where the carrying amount of an asset or CGU exceeds its recoverable amount, the asset or CGU is considered impaired and is written down to its recoverable amount. In assessing the value-in-use, the estimated future cash flows are discounted to their present value using a pre-zakat/income tax discount rate that reflects current market assessment of the time value of money and the risks specific to the asset.

The Company’s impairment calculation is based on detailed budgets and forecast calculations, which are prepared separately for each of the Company’s CGU’s to which the individual asset are allocated. These budgets and forecast calculations are generally covering a five-year period. For longer years, a long-term growth rate is calculated and applied to project future cash flows after the budgeted period.

Impairment losses of continuing operations, including impairment on working capital, if applicable, are recognized in the statement of income in those expense categories consistent with the function of the impaired asset.

Irrespective of whether there is any indication of impairment, the Company shall also test intangible assets with an indefinite useful life or intangible assets not yet available for use for impairment annually by comparing their carrying amount with respective recoverable amount. This impairment test may be performed at any time during an annual period, provided it is performed at the same time every year. Different intangible assets may be tested for impairment at different times. However, if such an intangible asset was initially recognized during the current annual year, that intangible asset shall be tested for impairment before the end of the current annual year.

For assets, an assessment is made at each financial year-end as to whether there is any indication that previously recognized impairment losses may no longer exist or may have decreased. If such indication exists, the Company estimates the asset’s or CGU’s recoverable amount. A previously recognized impairment loss is reversed only if there has been a change in the assumptions used to determine the asset’s recoverable amount since the last impairment loss was recognized.

This reversal is limited such that the recoverable amount does not exceed what the carrying amount would have been, net of depreciation, had no impairment loss been recognized for the asset in prior years. Such reversal is recognized in the statement of income.

Financial assets

Initial recognition and measurement

Financial assets are classified, at initial recognition, as financial assets at fair value through profit or loss, loans and receivables, held-to-maturity investments, available-for-sale financial assets or as derivatives designated as hedging instruments in an effective hedge, as appropriate. All financial assets are recognized initially at fair value plus, in the case of financial assets not recorded at fair value through profit or loss, transaction costs that are attributable to the acquisition of the financial asset.

Purchases or sales of financial assets that require delivery of assets within a time frame established by regulation or convention in the market place (regular way trades) are recognized on the trade date i.e., the date that the Company commits to purchase or sell the asset.

Subsequent measurement

For purposes of subsequent measurement financial assets are classified under loans and receivables.

Loans and receivables

Loans and receivables are non-derivative financial assets with fixed or determinable payments that are not quoted in an active market. After initial measurement, such financial assets measured at amortized cost using the effective interest rate (EIR) method, less impairment. Amortized cost is calculated by taking into account any discount or premium on acquisition and fees or costs that are an integral part of the EIR.

15

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

5    Summary of significant accounting policies (continued)

Financial assets (continued)

The EIR amortization is included in finance income in the statement of income. The losses arising from impairment are recognized in the statement of income in finance costs for loans and in cost of sales or other operating expenses for receivables.

Derecognition

A financial asset (or, where applicable, a part of a financial asset or part of a Company of similar financial assets) is primarily derecognized (i.e. removed from the Company’s statement of financial position) when:

• The rights to receive cash flows from the asset have expired, or

• The Company has transferred its rights to receive cash flows from the asset or has assumed an obligation to pay the received cash flows in full without material delay to a third party under a ‘pass-through’ arrangement; and either (a) the Company has transferred substantially all the risks and rewards of the asset, or (b) the Company has neither transferred nor retained substantially all the risks and rewards of the asset, but has transferred control of the asset.

Impairment of financial assets

The Company assesses at each reporting date whether there is any objective evidence that a financial asset or a group of financial assets is impaired. A financial asset or a group of financial assets is deemed to be impaired if, and only if, there is objective evidence of impairment as a result of one or more events that has occurred after the initial recognition of the asset and a loss event has an impact on the estimated future cash flows of the financial asset or the group of financial assets that can be reliably estimated. Evidence of impairment may include indications that debtors or a group of debtors are experiencing significant financial difficulty, default or delinquency in interest or principal payments, the probability that they will enter into bankruptcy or other financial reorganization and where observable data indicate that there is a measurable decrease in the estimated future cash flows, such as changes in arrears or economic conditions that correlate with defaults.

Financial liabilities

Initial recognition and measurement

Financial liabilities are classified under either of the two classes at initial recognition:

• Financial liabilities at fair value through profit or loss

• Other financial liabilities measured at amortized cost using the effective interest rate method

The category of financial liability at fair value through profit or loss has two subcategories:

• Designated: A financial liability that is designated by the entity as a liability at fair value through profit or loss upon initial recognition

• Held for trading: A financial liability classified as held for trading, such as an obligation for securities borrowed in a short sale, which have to be returned in the future. This category also includes derivative financial instruments entered into by the Company that are not designated as hedging instruments in hedge relationships. Separated embedded derivatives are also classified as held for trading unless they are designated as effective hedging instruments.

All financial liabilities are recognized initially when the Company becomes party to a contractual provisions and obligations under the financial instrument. The liabilities are recorded at fair value, and in the case of loans and borrowings and payables, the proceeds received net of directly attributable transaction costs.

Subsequent measurement

Financial liabilities at fair value through profit and loss will continue to be recorded at fair value with changes being recorded in the statement of income.

For other financial liabilities, including loans and borrowings, after initial recognition, these are subsequently measured at amortized cost using the effective interest rate method. Gain and losses are recognized in statement of income when the liabilities are derecognized as well as through the effective interest rate amortization process.

Amortized cost is calculated by taking into account any discount or premium on acquisition and fees or costs that are an integral part of the effective interest rate method. The effective interest rate amortization is included as finance costs in the statement of income.

16

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

5    Summary of significant accounting policies (continued)

Financial liabilities (continued)

De-recognition

A financial liability is de-recognized when the obligation under the liability is discharged or canceled, or expires. When an existing financial liability is replaced by another from the same lender on substantially different terms, or the terms of an existing liability are substantially modified, such an exchange or modification is treated as the de-recognition of the original liability and the recognition of a new liability. The difference in the respective carrying amounts is recognized in the statement of income.

Offsetting of financial instruments

Financial assets and financial liabilities are offset and the net amount is reported in the statement of financial position if there is a currently enforceable legal right to offset recognized amounts and there is an intention to settle on a net basis, to realize the assets and settle the liabilities simultaneously.

Borrowing costs

Borrowing costs consist of mark-up and other costs that an entity incurs in connection with the borrowing of funds. General and specific borrowing costs that are directly attributable to the acquisition, construction or production of a qualifying asset are capitalized during the year of time that is required to complete and prepare the asset for its intended use or sale. Qualifying assets are assets that necessarily take a substantial period of time to get ready for their intended use or sale.

Other borrowing costs are expensed in the year in which they are incurred.

Inventories

Inventories, including raw materials, work in progress, finished goods and consumables (spares) are valued at the lower of cost i.e. historical purchase prices based on the weighted average principle plus directly attributable costs (primarily duty and transportation), or the net realizable value.

Inventories of work in progress and finished goods include cost of materials, labor and an appropriate proportion of variable and fixed direct overheads.

Abnormal inventory losses due to quality or other issues and overheads incurred during unplanned maintenance / shut down year are excluded from inventory cost. The allocation of overheads at year end for the purpose of inventory valuation are based on the higher of normal capacity or actual production for the year. Costs are assigned to individual items of inventory on the basis of weighted average costs. Costs of purchased inventory are determined after deducting rebates and discounts. Net realizable value is the estimated selling price in the ordinary course of business, less estimated costs of completion and the estimated costs necessary to complete a sale.

Scrap inventory, co-product and by-product

Production process in the Company sometimes results in production of co-product simultaneously, or may result in some by-products or scraps (either non-usable or recyclable). When the costs of conversion of such co/by-product and/or scrap are not separately identifiable from the main product cost, they are allocated on a rational and consistent basis to such products and co/by-product and scrap. The allocation is based on the relative sales value of each product either at the stage in the production process when the products become separately identifiable, or at the completion of production.

Where by-products and scrap are immaterial and where costs cannot be allocated to them or it is inefficient to do so, these items are measured under inventory at net realizable value and this value is deducted from the cost of the main product. As a result, the carrying amount of the main product inventory is not materially different from its cost.

In the statement of income, the net realizable value for the by-products and scrap reduces the cost of sales for the year.

Consumable spare parts

Consumables are ancillary materials which are consumed in the production of semi-finished and finished products. Consumables may include engineering materials, one-time packaging materials and certain catalysts.

17

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

5    Summary of significant accounting policies (continued)

Inventories (continued)

Spare parts are the interchangeable parts of plant and equipment which are considered to be essential to support routine maintenance, repair and overhaul of plant and equipment or to be used in emergency situations for repairs. The Company maintains the following different types of spare parts:

• Stand-by equipment items acquired together with the plant/production line or purchased subsequently but related to a particular plant or production line and will rarely be required are critical to plant operation and must be available at stand-by at all times. These do not form part of inventory provided capitalization criteria under property, plant and equipment is met.

• Repairable items that are plant/production line specific with long lead times and will be replaced and refurbished frequently (mostly during turnarounds). Depreciation is started from day of installation of these items in the plant, and the depreciation year is the shorter of the useful life of the component and the remaining useful life of the plant and equipment in which it is installed. These do not form part of inventory.

• General capital spares and other consumables items which are not of a critical nature and are of a general nature, i.e., not plant specific and can be used in multiple plants or production lines and any other items which may be required at any time for facilitating plant operations. They are generally classified as ‘consumables and spare parts’ under inventory, unless they exceed the threshold and have a useful life of more than one year, under which case they are recorded under property, plant and equipment. Items recorded under inventory are subject to assessment for obsolescence provision and are charged to the statement of income upon their installation or use. Where such items meet criteria for capitalization, their depreciation method is similar to repairable items as noted above.

Inventory swaps

Revenue can only be recognized for exchange of goods if they are dissimilar in nature or the exchange results in a significant change in the configuration of cash flows of the transferor.

Where the inventory swap transactions represent exchange of similar items within a limited short year of time, these transactions do not generally carry commercial substance. Revenue can only be recognized for exchange of goods if they are dissimilar in nature or the exchange results in a significant change in the configuration of cash flows of the transferor. Where this is not the case, these transactions are recorded as stock transfers between the companies at cost and the corresponding effect is recorded as receivables and payables.

Trade and other receivables

Trade and other receivables are stated at the amortized cost, which generally correspond to face value (original invoice amount), do not bear interest, and generally have a 30 to 60 days term, less provision for doubtful debts and impairment, if any. An allowance for doubtful debts is made based upon Company’s best estimate of losses related to those receivables. Such estimate is based on customers’ financial status and historical write-off experience. Account balances are written off against such allowance after all means of collection have been exhausted and potential of recovery is remote. Bad debts written off, if any as such are recorded in the statement of income as incurred.

Other receivables include loans, receivables, supplier advances, employee receivables and other such receivables which are not ‘trade’ receivables. Other receivables are stated at amortized cost which generally corresponds to their face value. Allowance for doubtful receivables is assess as per methodology noted above.

Cash and cash equivalents

Cash and cash equivalents include cash on hand, bank balances, short-term deposits, demand deposits and highly liquid investments with original maturities of three months or less that are readily convertible to known amounts of cash and which are subject to an insignificant risk of changes in value. For the purpose of the cash flow statement, the cash and cash equivalents will also include bank overdrafts which are presented under borrowings in current liabilities in the statement of financial position, if any.

Reserves

As required by the Memorandum of Association of the Company, 10% of the annual net income must be transferred to the statutory reserve until this reserve equals 50% of the paid up capital. However, as per the Saudi Arabia Regulations for Companies, the said requirement of 50% is now reduced to 30%. The reserve is not available for distribution.

18

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

5    Summary of significant accounting policies (continued)

Employees end of service benefits and post-employment benefits

Short-term obligations

Liabilities for wages and salaries, including non-monetary benefits and accumulating leaves, air fare, child education allowance, furniture allowance that are expected to be settled wholly within twelve months after the end of the year in which the employees render the related service are recognized in respect of employees’ services up to the end of the reporting year and are measured at amounts expected to be paid when the liabilities are settled. The liabilities are presented as current employee benefit obligations in statement of financial position.

Other long-term employee benefit obligations

Other long-term employee benefit obligations (including continuous service awards and long service leave) are measured as the present value of expected future payments to be made in respect of services provided by employees up to the end of the reporting year using the projected unit credit method and recorded as non-current liabilities. Consideration is given to expect future wage and salary levels, experience of employee departures, historic attrition rates and years of service. Expected future payments are discounted using market yields at the end of the reporting year of high-quality corporate bonds with terms and currencies that match, as closely as possible, the estimated future cash outflows. Re-measurements as a result of experience adjustments and changes in actuarial assumptions are recognized in the statement of other comprehensive income.

Post-employment obligation

The Company operates various post-employment schemes, including both defined benefit and defined contribution plans and post-employment medical plans for eligible employees and their dependents.

Defined contribution plans

A defined contribution plan is a post-employment benefit plan under which the Company pays fixed contributions in to a separate entity and will have no legal or constructive obligation to pay amounts. The contributions are recognized as employee benefit expense when they are due. Prepaid contributions are recognized as an asset to the extent that a cash refund or a reduction in the future payments is available. Eligible employees who participate in defined contribution plan may also invest a portion of their earnings in various program funds.

The Company operates a saving plan to encourage its Saudi employees to make savings in a manner that will warrant an increase in their income and contribute to securing their future according to the established plan. The saving contributions from the participants are deposited in a separate bank account other than the Company’s normal operating bank accounts (but not in any separate legal entity). This cash is a restricted balance and for purpose of presentation in the financial statement, it is offset with the related liability under the savings plan and net liability to employees is reported under the employee benefits liability.

Defined benefit plans

A defined benefit plan is a post-employment benefit plan other than a defined contribution plan. The Company primarily has end of service benefits and post-retirement medical plans which qualify as defined benefit plans.

(a)    End of service benefits

The net asset or liability recognized in the statement of financial position in respect of defined benefit post-employment plans is the fair value of plan assets, if any, less the present value of the projected defined benefit obligation (DBO) at the reporting date. The defined benefit obligation is calculated annually by independent actuaries using the projected unit credit method. The present value of the defined benefit obligation is determined by discounting the estimated future cash outflows using interest rates of high-quality corporate bonds that are denominated in the currency in which the benefits will be paid, and that have terms approximating to the terms of the related obligation. In countries where there is no deep market in such bonds, the market rates on government bonds are used. The net interest cost is calculated by applying the discount rate to the net balance of the defined benefit obligation and the fair value of plan assets. This cost is included in employee benefit expense in the statement of income.

Re-measurement gains and losses arising from experience adjustments and changes in actuarial assumptions are recognized in the year in which they occur in other comprehensive income.

Changes in the present value of the defined benefit obligation resulting from plan amendments or curtailments are recognized immediately in statement of income as past service costs.

19

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

5    Summary of significant accounting policies (continued)

Employees’ end of service benefits and post-employment benefits (continued)

Valuations of the obligations under plans which are not funded are carried out by independent actuaries based on the projected unit credit method. The costs relating to such plans primarily consist of the present value of the benefits attributed on an equal basis to each year of service and the interest on this obligation in respect of employee service in previous years.

Current and past service costs related to post-employment benefits are recognized immediately in the statement of income while unwinding of the liability at discount rates used are recorded as financial cost. Any changes in net Employee end of service benefits and post-employment benefits liability due to actuarial valuations and changes in assumptions are taken as re-measurement in other comprehensive income.

For the liability for employees’ end of service benefits, the actuarial valuation process takes into account the provisions of the Saudi Arabian Labor and Workmen law as well as Company policy.

(b)    Medical insurance

The Company provides post-retirement healthcare benefits to their eligible retirees and their dependents. The expected costs of these benefits are accrued over the year of employment using the same accounting methodology as used for defined benefit plans. Re-measurement gains and losses arising from experience adjustments and changes in actuarial assumptions are charged or credited to equity in other comprehensive income in the year in which they arise. These obligations are valued annually by independent qualified actuaries.

The accounting for these plans requires that management makes certain assumptions relating to discount rates used to measure future obligations and expenses, salary scale inflation rates, health care cost trend rates, mortality and other assumptions. These estimates are highly susceptible to change from year to year based on the performance of plan assets (if any), actuarial valuations, market conditions and contracted benefit changes. The selection of assumptions is based on historical trends, future estimates based on economic and market conditions at the time of valuation. However, actual results may differ substantially from the estimates that were based on the critical assumptions used.

Employee Home Ownership Program (HOP)

The Company has established an employee’s home ownership programs (HOP) that offer eligible employees the opportunity to buy residential units constructed by the Company through a series of payments over a particular number of years. Ownership of the houses is transferred upon completion of full payment.

Under the HOP, the amounts paid by the employee towards the house are partially repayable back to the employee in case the employee discontinues employment and the house is returned back to the Company. HOP is recognized as a non-current prepayment asset at time the residential units are allocated to the employees and are amortized over the repayment period of the facility due from employees.

Employee Home Loan Program (HLP)

The Company provides interest-free home loan to its eligible employees for one time only during the year of the service for purposes related to purchase or building of a house or apartment. The loan is repaid in monthly installment by deduction of employee’s housing allowances.

Executive vehicles

The Company grants eligible employees a company owned vehicle up to a specific value. The benefit is provided to employees against their services for a fixed year of years. The employee also has an option to opt for a higher value vehicle and the difference in value is contributed by the employee. The vehicle shall remain the property of the Company. The Company’s Human Resource policy governs the arrangement with the employee and may define conditions under which such vehicle can be transferred to employee.

20

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

5    Summary of significant accounting policies (continued)

Provisions

General

Provisions are recognized when the Company has a present obligation (legal or constructive) as a result of a past event, it is probable that an outflow of resources embodying economic benefits will be required to settle the obligation and a reliable estimate can be made of the amount of the obligation. Where management of the Company expects some or all of a provision to be reimbursed, for example under an insurance contract, the reimbursement is recognized as a separate asset but only when the reimbursement is virtually certain. The expense relating to any provision is presented in statement of income net of any reimbursement. If the effect of the time value of money is material, provisions are discounted using a current pre-tax rate that reflects, where appropriate, the risks specific to the liability. Where discounting is used, the increase in the provision due to the passage of time is recognized as a finance cost.

Environmental obligations

In accordance with the Company’s environmental policy and applicable legal requirements, management of the Company recognizes a provision for environmental clean-up cost when it is probable that a legal and constructive liability has materialized and the amount of cash outflow can be reasonably estimated.

Zakat and income tax

Zakat

Zakat is provided in accordance with the Regulations of the General Authority of Zakat and Taxes (GAZT) in the Kingdom of Saudi Arabia and on accruals basis. The provision is charged to the statement of income. Differences, if any, resulting from the final assessments are adjusted in the year of their finalization.

Income tax

Foreign ownership in the Company is subject to income tax in KSA, which is included as a current year expense in the statement of income.

Current income tax assets and liabilities for the current and prior years are measured at the amount expected to be recovered from or paid to the relevant tax authorities.

Current income tax

The tax rates and tax laws used to compute the amount of corporate income taxes due are those that are enacted or substantively enacted at the reporting date. Management periodically evaluates positions taken in the Company’s tax returns with respect to situations in which applicable tax regulations are subject to interpretation and establishes provisions where appropriate.

Deferred income tax

Deferred income tax is provided using the liability method on temporary differences at the reporting date between the tax bases of assets and liabilities and their carrying amounts for financial reporting purposes.

The carrying amount of deferred income tax assets is reviewed at each reporting date and reduced to the extent that it is no longer probable that sufficient taxable profit will be available to allow all, or part, of the deferred income tax asset to be utilized. Unrecognized deferred income tax assets are reassessed at each reporting date and are recognized to the extent that it has become probable that future taxable profit will allow the deferred tax asset to be recovered.

Deferred tax assets and liabilities are measured at the tax rates that are expected to apply in the year when the asset is realized or the liability is settled, based on tax rates and tax law enacted or substantively enacted at the reporting date. Deferred tax relating to items outside statement of income is recognized outside statement of income. Deferred tax items are recognized in correlation to the underlying transaction either in statement of other comprehensive income or directly in equity.

Deferred tax assets and deferred tax liabilities are offset, if a legally enforceable right exists to set off current tax assets and current tax liabilities and the deferred taxes relate to the same taxable entity and the same taxation authority.

21

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

5    Summary of significant accounting policies (continued)

Zakat and income tax (continued)

Withholding tax

Withholding tax due, if any, related to dividends, royalties, interest and service fees are recorded as liabilities at par value.

Foreign currency translation

Transactions in foreign currencies are initially recorded by the Company at their respective functional currency spot rates at the date the transaction first qualifies for recognition. Monetary assets and liabilities denominated in foreign currencies are translated at the functional currency spot rates of exchange at the reporting date.

Differences arising on settlement or translation of monetary items are recognized in statement of income. Tax charges and credits attributable to exchange differences on those monetary items are also recorded in other comprehensive income.

Non-monetary items that are measured in terms of historical cost in a foreign currency are translated using the exchange rates at the dates of the initial transactions. Non-monetary items measured at fair value in a foreign currency are translated using the exchange rates at the date when the fair value is determined. The gain or loss arising on translation of non-monetary items measured at fair value is treated in line with the recognition of gain or loss on change in fair value of the item (i.e., translation differences on items whose fair value gain or loss is recognized in other comprehensive income or statement of income are also recognized in other comprehensive income or statement of income, respectively).

Fair value measurement

Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value measurement is based on the presumption that the transaction to sell the asset or transfer the liability takes place either:

• In the principal market for the asset or liability, or

• In the absence of a principal market, in the most advantageous market for the asset or liability

A fair value measurement of a non-financial asset takes into account a market participant's ability to generate economic benefits by using the asset in its highest and best use or by selling it to another market participant that would use the asset in its highest and best use.

All assets and liabilities for which fair value is measured or disclosed in the financial statements are categorized within the fair value hierarchy, described as follows, based on the lowest level input that is significant to the fair value measurement as a whole:

• ·Level 1 — Quoted (unadjusted) market prices in active markets for identical assets or liabilities

• ·Level 2 —Valuation techniques for which the lowest level input that is significant to the fair value measurement is directly or indirectly observable

• ·Level 3 —Valuation techniques for which the lowest level input that is significant to the fair value measurement is unobservable

Revenue recognition

Revenue is recognized to the extent that it is probable that the economic benefits will flow to the Company and the revenue can be reliably measured, regardless of when the payment is made. Revenue is measured at the fair value of the consideration received or receivable, taking into account contractually defined terms of payment and excluding any taxes or duty. Amounts disclosed as revenue are net of returns, trade allowances, rebates and amounts collected on behalf of third parties.

The specific recognition criteria described below must also be met before revenue is recognized.

Sale of goods

Revenue from the sale of goods is recognized when the significant risks and rewards of ownership of the goods have passed to the buyer. Revenues represent the invoiced value of goods shipped and services rendered by the Company during the year, net of any trade and quantity discounts.

22

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

5    Summary of significant accounting policies (continued)

Expenses

Cost of sales

All expenses are recognized on an accrual basis. Operating costs are recognized on a historical cost basis. Production costs and direct manufacturing expenses are classified as cost of sales. This includes raw material, direct labor and other attributable overhead costs. Other costs such as selling costs are recorded as selling and distribution expenses while all remaining other costs are presented as general and administrative expenses.

General and administrative expenses

These pertain to operation expenses which are not directly related to the production of any goods or services. These also include allocations of general overheads which are not specifically attributed to cost of sales or selling and distribution expenses.

Selling and distribution expenses

These include any costs incurred to carry out or facilitate all selling activities at the Company. These costs typically include salaries of the sales staff, marketing and distribution and logistics expense. These also include allocations of certain general overheads.

Allocation of overheads between cost of sales, selling and distribution expenses, and general and administrative expenses, where required, is made on a consistent basis.

Finance income

Earnings on time deposits are recognized on an accrual basis.

Dividends

The Company recognizes a liability to make cash distribution when the distribution is authorized and the distribution is no longer at the discretion of the Company. As per the corporate laws in KSA, a distribution is authorized when it is approved by the shareholders. A corresponding amount is recognized directly in equity. Interim dividends, if any, are recorded when approved by the Board of Directors.

6    FIRST-TIME ADOPTION OF IFRS

For all periods up to and including the year ended December 31, 2016, the Company prepared its financial statements in accordance with Generally Accepted Accounting Principles (GAAP) issued by SOCPA in KSA (“SOCPA GAAP”). As noted in note 2.1, these financial statements are the Company’s first such financial statements in accordance with the IFRS as endorsed in KSA.

Accordingly, the Company has applied the IFRS as endorsed in KSA for preparation of its financial statements for the year beginning January 1, 2017, as well as for presenting the relevant comparative year data. In compliance with requirements of IFRS 1 endorsed in KSA, the Company’s opening statement of financial position was prepared as at January 1, 2016 after incorporating required adjustments to reflect the transition to IFRS as endorsed in KSA from the previous SOCPA GAAP. The Company has analyzed the impact on the statement of financial positions as at January 1, 2016, December 31, 2016 and following are the significant adjustments in transitioning from SOCPA GAAP to IFRS as endorsed in KSA.

23

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

6    FIRST-TIME ADOPTION OF IFRS (continued)

The following is a reconciliation of the Company’s statement of changes in equity at December 31, 2016:

	Note	Share capital	Statutory reserve	Other reserves	Retained earnings	Total
Balance as per SOCPA GAAP		558,000	279,000	-	559,906	1,396,906
IFRS adoption adjustments
-   Actuarial valuations of employees benefit	A	-	-	11,417	(63,367)	(51,950)
-   Deferred tax	B	-	-	-	20,328	20,328
-   Impairment of property, plant and equipment	C	-	-	-	(669,007)	(669,007)
-   Impact due to componentization of property, plant and equipment	C	-	-	-	38,509	38,509
-   Impact of property, plant and equipment expensed out	C	-	-	-	(45,581)	(45,581)
-   Others, net	D, E, F	-	-	-	(20,471)	(20,471)
Total adjustment to equity		-	-	11,417	(739,589)	(728,172)
Balance as per IFRS as endorsed in KSA		558,000	279,000	11,417	(179,683)	668,734

The following is a reconciliation of the Company’s statement of changes in equity at the transition date of January 1, 2016:

	Note	Share capital	Statutory reserve	Other reserves	Retained earnings	Total
Balance as per SOCPA GAAP		558,000	279,000	-	223,056	1,060,056
IFRS adoption adjustments
-   Actuarial valuations of employees benefit	A	-	-	-	(56,397)	(56,397)
-   Deferred tax	B	-	-	-	23,146	23,146
-   Impact due to componentization of property, plant and equipment	C	-	-	-	46,912	46,912
-   Impact of property, plant and equipment expensed out	C	-	-	-	(42,843)	(42,843)
-   Others, net	D, E, F	-	-	-	(17,612)	(17,612)
Total adjustment to equity		-	-	-	(46,794)	(46,794)
Balance as per IFRS as endorsed in KSA		558,000	279,000	-	176,262	1,013,262

The Company’s reconciliation of total statement of income for the year ended December 31, 2016:

	Note	For the year ended 31 December 2016
Net income under SOCPA GAAP		785,818
IFRS adoption adjustments
-Actuarial valuations of employee benefits	A	(6,970)
-Recognition of deferred tax asset	B	(2,818)
-Impairment of property, plant and equipment	C	(669,007)
-Componentization of property, plant and equipment	C	(8,403)
-Property, plant and equipment expensed out	C	(2,738)
-Reclassification of zakat and income tax to income statement	H	(79,233)
-Others, net	D, E, F	(2,859)
Total adjustment to income statement		(772,028)
Net income under IFRS as endorsed in KSA		13,790

24

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

6    FIRST-TIME ADOPTION OF IFRS (continued)

Estimates

The estimates at December 31, 2016 are consistent with those made for the same dates in accordance with SOCPA (after adjustments to reflect any differences in accounting policies) apart from actuarial valuation in end of service benefits, post-employment medical benefits and continuous service award. Refer Note 3.1.3, where application of SOCPA did not require estimation:

The impacts on cash flows were:

	SOCPA GAAP for the year ended 31 December 2016	IFRS as endorsed in KSA for the year ended 31 December 2016	Difference
Net cash from operating activities	616,111	645,561	29,450
Net cash used in investing activities	(487,189)	(517,909)	(30,720)
Net cash from in financing activities	40,515	40,515	-

6A    Employees benefits

(i) Under IFRS, end of service benefits (“EOSB”) and post-employment medical benefits are required to be calculated using actuarial assumptions. Historically, the Company has calculated these obligations based on the current provision. This change resulted in an increase in the EOSB and post-employment medical benefits liability balances on the transition date and the closing date December 31, 2016 and a decrease in retained earnings and income for the year ended December 31, 2016.

(ii) Under IFRS, accumulated paid absences are those that are carried forward and can be used in future years if the current year’s entitlement is not used in full. The obligation arising in respect of these accumulating absences is required to be recognized under IFRS irrespective of whether the absences are vesting or non-vesting. This change has resulted in an increase in accrual for vacation pay and a decrease in retained earnings and income for the year ended December 31, 2016 respectively.

(iii) Under IFRS, the Company's continuous service award meets the criteria of other long term employees’ benefit and the obligation with respect to the entitlement of employees is required to be recognized using actuarial assumptions.

This change has resulted in increase in the continuous service award benefit liability balance on the transition date and the year December 31, 2016 and a decrease in retained earnings and income for the year ended December 31, 2016 respectively.

(iv) Under IFRS, accruals are required for annual short-term employee benefits. These include education expenses paid or reimbursed for employee's dependents and airfare allowances for employees' travel to home countries. This change has resulted in an increase in accruals, increase in prepayments and a net impact on the retained earnings. Historically, these expenses were recognized when they were paid or reimbursed.

6B    Deferred taxes

Deferred taxes arise due to taxable and deductible temporary differences between the carrying amounts of the Company’s assets and liabilities and their tax bases as per the requirements of IAS-12 “Income Taxes”.

6C    Property, plant and equipment

The adjustments in property, plant and equipment relate to the following:

(i) Under IFRS, contractual license obtained to produce specific product is typically considered as an identifiable intangible asset. Historically, these have been capitalized as part of the related property, plant and equipment and assets under construction. This change has resulted in an increase in intangible assets and a decrease in the property plant and equipment.

25

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

6    FIRST-TIME ADOPTION OF IFRS (continued)

6C    Property, plant and equipment (continued)

(ii) Under IFRS, an arrangement that comprises a transaction or a series of related transactions, that does not take the legal form of a lease but conveys a right to use an asset in return for a payment or series of payments qualifies for recognition as a finance lease. Certain lease arrangements within the Company quality for recognition as finance leases under IFRS. This resulted in an increase in finance lease payables, an increase in related property, plant and equipment and a decrease in retained earnings.

(iii) Under IFRS, property, plant and equipment needs to be componentized and their useful lives separately identified. Historically, there was no such requirement. Accordingly, an assessment was made by the Company which resulted in adjusted accumulated depreciation and retained earnings on the IFRS transition date reflecting the change in classification and useful lives.

(iv) Under IFRS, vehicles that are exclusively used by employees and eventually owned by them needs to be classified as a prepaid employee benefit. This resulted in a decrease in property, plant and equipment and an increase in other assets.

(v) Under IFRS, for joint operated production arrangements, the Company that controls and manages all the relevant activities related to the assets recognizes the full amount of the asset at cost in its books. Previously, these were recognized at the proportion of funds provided by the Company. This resulted in an increase in property, plant and equipment and an increase in production advance liability (other long-term liabilities).

6D    Intangible assets

Under IFRS, home ownership receivables as well as the related site development costs is considered as a benefit provided to employees against their services. The site development costs had historically been recorded as intangible assets. As a result of this change, amounts have been reclassified from intangible assets to other non-current assets.

6E    Prepayments and other assets

Under IFRS, an arrangement that comprises a transaction or a series of related transactions that does not take the legal form of a lease but conveys a right to use an asset in return for a payment or series of payments qualifies for recognition as a finance lease (classified in other assets).

Current portion of furniture allowance which is amortized over five years has been separated from non-current assets.

6F    Inventories

(i) Under IFRS, costs which are not directly related to the production of inventories are not capitalized in the inventory costing and instead are expensed. On the transition date, this change has resulted a decrease in inventories and a decrease in retained earnings at the transition date.

(ii) Under IFRS, inventory that is lent or borrowed does not form part of the inventory balance and has to be recognized as a receivable or payable depending upon the swap arrangement. The adjustment resulted in net decrease in inventory and recognition of receivable and payable.

6G    Cash and cash equivalents

Adjustment relates to savings (thrift) plan for which contributions have been recorded as an employee contribution payable. The cash contributed in respect of this liability is held in separate bank accounts not used in Company’s operations. On the transition date, this change has resulted in decrease in cash and cash equivalents and decrease in employee benefits (long-term liabilities).

6H    Reclassification of zakat and income tax to income statement

In line with “IAS 12 – Income Tax”, income tax was previously required to be recorded under retained earnings, have been reclassified to statement of income. The same treatment has been followed for zakat.

26

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

7    Property, plant and equipment

	For the year ended 31 December 2017
	Buildings	Plant and equipment	Furniture and fixtures	Vehicles	Assets under finance lease	Assets under construction	Total
Cost:
At the beginning of the year	319,658	3,379,733	53,297	14,589	6,599	2,260,233	6,034,109
Additions	1,177	17,421	572	3,401	-	243,632	266,203
Transfers	11,487	90,690	85	75	-	(102,337)	-
Transferred to other non-current assets	-	-	-	-	-	(8,896)	(8,896)
At the end of the year	332,322	3,487,844	53,954	18,065	6,599	2,392,632	6,291,416
Accumulated depreciation and impairment:
At the beginning of the year	280,764	2,797,603	46,672	14,152	1,467	669,007	3,809,665
Depreciation	4,119	117,311	1,478	382	482	-	123,772
Impairment (note 7.2)	-	-	-	-	-	274,249	274,249
At the end of the year	284,883	2,914,914	48,150	14,534	1,949	943,256	4,207,686
Net book value:
As at December 31, 2017	47,439	572,930	5,804	3,531	4,650	1,449,376	2,083,730
As at December 31, 2016	38,894	582,130	6,625	437	5,132	1,591,226	2,224,444

27

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

7    Property, plant and equipment (continued)

	For the year ended 31 December 2016
	Buildings	Plant and equipment	Furniture and fixtures	Vehicles	Assets under finance lease	Assets under construction	Total
Cost:
At the beginning of the year	316,953	3,216,129	53,025	14,179	3,500	1,917,807	5,521,593
Additions	1,412	112,937	272	410	3,099	403,877	522,007
Transfers	1,293	50,667	-	-	-	(51,960)	-
Transferred to other non-current assets	-	-	-	-	-	(9,491)	(9,491)
At the end of the year	319,658	3,379,733	53,297	14,589	6,599	2,260,233	6,034,109
Accumulated depreciation and impairment:
At the beginning of the year	277,164	2,688,426	45,198	13,514	1,077	-	3,025,379
Depreciation	3,600	109,177	1,474	638	390	-	115,279
Impairment (note 7.2)	-	-	-	-	-	669,007	669,007
At the end of the year	280,764	2,797,603	46,672	14,152	1,467	669,007	3,809,665
Net book value:
As at December 31, 2016	38,894	582,130	6,625	437	5,132	1,591,226	2,224,444
As at January 1, 2016	39,789	527,703	7,827	665	2,423	1,917,807	2,496,214

The Company has renewed its industrial land lease agreement with the Royal Commission for Jubail and Yanbu for a period of 10 years commencing from 1 Jumada ‘I, 1432H (April 5, 2011).

During 2014, the Company entered into a sub-lease agreement with a related party to sub-lease portion of Company’s industrial land.

Assets under finance lease represented cost of specific assets constructed by related parties for supply of feedstock and utilities to the Company.

28

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

7    Property plant and equipment (continued)

Construction work in progress mainly represents the POM project under construction at December 31, 2017 amounted to SR 2,210 million (2016: SR 2,096.2 million). This comprise of construction costs under various agreements and directly attributable costs to bring the asset to the location and condition necessary for it to be capable of operating in a manner intended by the management. Directly attributable costs mainly include employee benefits, licensing fees, borrowing cost and engineering costs etc. The borrowing cost capitalized during the year ended December 31, 2017 amounted to SR 43.3 million (2016: SR 38.6 million), relating to non-conventional facilities. The related capital commitments are reported in note 28.

Due to significant decrease in selling prices, increase in project costs, increase in feedstock prices and increase in utilities prices, the management of the Company has carried out an impairment testing of its POM plant as per the requirements of IFRS. The value in use was determined as on December 31, 2017 and 2016 based on various assumptions. Based on the said impairment testing, the Company’s management determined the value in use of SR 983.3 million and SR 1,114.4 million as of December 31, 2017 and 2016 respectively which has resulted in the impairment loss of SR 274.2 million and SR 669 million as of December 31, 2017 and 2016 respectively. The said impairment loss has been recognized in cost of sales in the statement of income.

7.1    Allocation of depreciation and impairment charge for the year

	Note	For the year ended December 31, 2017	For the year ended December 31, 2016
Cost of sales
Depreciation		116,163	108,355
Impairment	7.2	274,249	669,007
General and administrative expenses		7,609	6,924
Total		398,021	784,286

8    Intangible assets

	For the year ended December 31, 2017
	Software	Under development	Total
Cost:
At the beginning of the year	38,174	14,475	52,649
Additions	1,821	55,462	57,283
At the end of the year	39,995	69,937	109,932
Accumulated amortization:
At the beginning of the year	27,781	-	27,781
Charge for the year	4,487	-	4,487
At the end of the year	32,268	-	32,268
Net book value:
As at December 31, 2017	7,727	69,937	77,664
As at December 31, 2016	10,393	14,475	24,868

29

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

8    Intangible assets (continued)

	For the year ended December 31, 2016
	Software	Under development	Total
Cost:
At the beginning of the year	35,549	14,475	50,024
Additions	2,625	-	2,625
At the end of the year	38,174	14,475	52,649
Accumulated amortization:
At the beginning of the year	23,504	-	23,504
Charge for the year	4,277	-	4,277
At the end of the year	27,781	-	27,781
Net book value:
As at December 31, 2016	10,393	14,475	24,868
As at January 1, 2016	12,045	14,475	26,520

9    Other non-current assets

These comprise mainly of receivable from employees on account of housing ownership program and housing loan program.

10    Inventories

	December 31, 2017	December 31, 2016	January 1, 2016
Finished goods	121,396	65,583	70,705
Raw materials	4,651	1,754	1,525
Spare parts	68,847	51,326	56,414
Goods in transit	2,702	4,362	2,936
	197,596	123,025	131,580
Less: Provision for slow moving and obsolete items	(23,934)	(21,906)	(19,552)
	173,662	101,119	112,028

Movements in the provision for obsolete inventories were as follows:

	For the year ended December 31, 2017	For the year ended December 31, 2016
Balance as at January 1	21,906	19,552
Charge for the year	2,028	2,354
Balance as at December 31	23,934	21,906

11    Trade and other receivables

	December 31, 2017	December 31, 2016	January 1, 2016
Receivables from related parties	334,923	265,590	230,698
Others	-	2,496	65
	334,923	268,086	230,763

30

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

11    Trade and other receivables (continued)

All sales are made to the Company’s shareholders, SABIC and Celanese Corporation, and its affiliates.

The aging analysis of trade receivable is as follows:

	Total	Neither past due nor impaired	< 30 days	30 – 60 days	60 – 90 days	90 – 120 days	>120 days
December 31, 2017	334,923	318,651	15,718	152	49	10	343
December 31, 2016	268,086	262,845	-	999	2,672	574	996
January 1, 2016	230,763	230,026	-	-	696	-	41

12    Prepayments and other current assets

	December 31, 2017	December 31, 2016	January 1, 2016
Related parties (note 26)	50,842	62,184	64,726
Prepaid expenses	26,105	26,820	20,846
Taxes refundable	-	1,886	-
Others	4,253	2,380	1,575
	81,200	93,270	87,147

13    Cash and cash equivalents

	Note	December 31, 2017	December 31, 2016	January 1, 2016
Time deposits
- With related party	13.1	986,250	-	-
- With banks		-	221,250	-
Bank balances		113,635	61,820	114,903
	13.2	1,099,885	283,070	114,903

13.1 Time deposits with related party represents with SABIC under centralized treasury agreement with profit

rate ranging 1.68% to 2.20% per annum having original maturities of less than three months.

13.2 All cash and cash equivalents are non-conventional.

13.3 Reconciliation to cash flow statement

The above figures reconcile to the amount of cash shown in the statement of cash flows at the end of the financial year. The table below provides details of amounts placed in various currencies.

	December 31, 2017	December 31, 2016	January 1, 2016
SAR	31,382	37,699	32,981
USD	1,068,503	245,371	81,922
	1,099,885	283,070	114,903

31

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

14    Share capital

	December 31, 2017	December 31, 2016	January 1, 2016
Authorized number of shares	7,420	7,420	7,420
Ordinary shares capital of SR 100,000 each (000)	742,000	742,000	742,000
Ordinary shares capital issued and fully paid (000)	558,000	558,000	558,000

15    Reserves

Statutory reserve

As required by the Memorandum of Association of the Company, 10% of the annual net income must be transferred to the statutory reserve until this reserve equals 50% of the paid up capital. However, as per the Saudi Arabia Regulations for Companies, the said requirement of 50% is now reduced to 30%. The reserve is not available for distribution.

Other reserves

The following table shows a breakdown of the balance sheet line item ‘other reserves’ and the movements in these reserves during the year.

	Actuarial gain/loss reserve
	December 31, 2017	December 31, 2016	January 1, 2016
At January 1	11,417	-	-
Other comprehensive income for the year	(4,303)	11,417	-
At December 31	7,114	11,417	-

16    Long-term borrowings

	Note	December 31, 2017	December 31, 2016	January 1, 2016
Commercial loans	16.1 & 16.2	1,396,392	1,421,246	1,008,962
Embedded finance leases		5,637	5,846	2,929
Total loans		1,402,029	1,427,092	1,011,891
Less: current portion:
Commercial loans	16.1 & 16.2	(187,627)	(187,423)	-
Embedded finance leases		(231)	(209)	(173)
		(187,858)	(187,632)	(173)
Long-term portion
Commercial loans	16.1 & 16.2	1,208,765	1,233,823	1,008,962
Embedded finance leases		5,406	5,637	2,756
		1,214,171	1,239,460	1,011,718

16.1 Long-term loans

During 2014, the Company entered into long-term loan agreements to finance POM plant expansion project. These loans are denominated in Saudi Riyals and US dollars carrying finance cost at 6 months SAIBOR + 0.74% and 6 months LIBOR + 1.25% respectively. The loan repayment is scheduled over semi-annual equal installments over a period of 12 and 7 years for Saudi Riyals and US dollars loans, respectively. The covenant of these loan agreements requires one of the Company’s partner to maintain certain ownership percentage in the Company for the duration of the agreements and certain other requirements.

32

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

16    Long-term borrowings (continued)

16.2    The aggregate repayment schedule of long-term borrowings is as follows:

	December 31, 2017	December 31, 2016
-2017	-	187,423
-2018	187,627	187,423
-2019	187,627	187,423
-2020	187,627	187,423
Thereafter	833,511	671,554
	1,396,392	1,421,246

17    Employees’ benefits

The provision of employee benefits can be broken down as follows:

	Note	December 31, 2017	December 31, 2016	January 1, 2016
Defined benefits obligations
Employee end of service benefits	17.1	180,400	161,069	171,675
Post-retirement medical benefits	17.1	8,594	3,812	3,944
		188,994	164,881	175,619
Other long-term employee benefits
Continuous service awards	17.1	1,497	1,218	1,077
Other benefits (saving plan)		5,519	4,818	4,310
		196,010	170,917	181,006

17.1 Measurement of end of service and other employees benefit obligations:

Defined benefits schemes and retiree health and benefits obligations are determined by actuarial valuations using a method based on projected end-of-career salaries (“The Projected Unit Credit Method”). Appropriate assumptions concerning mortality, employee turnover and interest rates are applied to determine the Company’s projected benefit obligation for other long-term employee benefits.

The following table represents the components of the defined benefits liability as at 31 December:

	For the year ended December 31, 2017
	End of Service Benefit Plan	Post-retirement medical benefits	Continues Service Awards
As at January 1	161,069	3,812	1,218
Charge recognized to income for the year
Current service cost	18,164	473	184
Interest cost	6,255	141	43
Charge recognized in other comprehensive income
Effect of change in financial assumptions	(1,763)	494	32
Effect of experience adjustments	1,775	3,807	(42)
Adjustments during the year	50	(44)	213
Payments during the year	(5,150)	(89)	(151)
As at December 31	180,400	8,594	1,497

33

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

17    Employees’ benefits (continued)

	For the year ended December 31, 2016
	End of Service Benefit Plan	Post-retirement medical benefits	Continues Service Awards
As at January 1	171,675	3,944	1077
Charge recognized to income for the year
Current service cost	18,329	412	153
Interest cost	6,729	136	41
Charge recognized in other comprehensive income
Effect of change in financial assumptions	1,764	217	-
Effect of experience adjustments	(12,764)	(634)	-
Adjustments during the year	774	(30)	30
Payments during the year	(25,438)	(233)	(83)
As at December 31	161,069	3,812	1,218

Major economic and actuarial assumptions used in Saudi Arabian benefits liabilities computation:

	End of Service Benefit Plan	Post-retirement medical benefits	Continues Service Awards
2017:
Discount rate per annum	3.6%	3.6%	3.6%
Salary increase rate per annum
- Executive	5%	-	-
- Non-Executive	6.5%	-	-
2016:
Discount rate per annum	4%	4%	4%
Salary increase rate per annum
- Executive	5%	-	-
- Non-Executive	7%	-	-

The sensitivity analysis of significant assumptions is as follows:

	End of Service Benefit Plan	Post-retirement medical benefits	Continues Service Awards
2017:
Discount rate
Increase by 25 basis points	170,091	8,085	1,235
Decrease by 25 basis points	179,968	8,726	1,276
Salary increase rate:
Increase by 25 basis points	179,895	8,397	1,255
Decrease by 25 basis points	170,134	8,397	1,255
2016:
Discount rate
Increase by 25 basis points	156,131	3,667	1,200
Decrease by 25 basis points	165,110	3,964	1,236
Salary increase rate:
Increase by 25 basis points	164,970	3,812	1,218
Decrease by 25 basis points	156,239	3,812	1,218

34

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

17    Employees’ benefits (continued)

The weighted average duration of the defined benefit obligation is 10-16 years. The expected maturity analysis of undiscounted end of service and post-employment medical benefits is as follows:

	Less than an year	Between 1-2 years	Between 2-5 years	Over 5 years	Total
2017:
End of service benefits	11,249	8,705	32,242	70,830	123,026
Post-retirement medical benefits	383	391	657	1,552	2,983
Service award	119	120	309	1,552	2,100
2016:
End of service benefits	7,752	11,029	30,047	68,787	117,615
Post-retirement medical benefits	119	120	309	678	1,226
Service award	217	171	397	826	1,611

18    Other non-current liabilities

	December 31, 2017	December 31, 2016	January 1, 2016
Production advances
Related parties	355,817	330,487	298,699
Third party	5,191	-	-
	361,008	330,487	298,699

These represent capital advances received from affiliated companies and a third party for their share of the capital cost of commonly used production facilities for truck loading and utilities, which is managed by the Company. These advances are being amortized to income over the useful lives of the related assets from date of capitalization.

19    Trade and other payables

	Note	December 31, 2017	December 31, 2016	January 1, 2016
Third parties		144,657	105,280	75,844
Related parties	26	66,781	48,000	42,065
		211,438	153,280	117,909

The Company’s exposure to currency and liquidity risk related to trade and other payables is disclosed in note 27.

20    Accrued and other current liabilities

	Note	December 31, 2017	December 31, 2016	January 1, 2016
Accrued liabilities		213,703	185,891	413,044
Accruals for related parties	26	27,422	68,111	18,853
Employees related liabilities		24,815	20,105	16,919
Mark-up payable		210	6,532	-
Others		581	373	10,294
		266,731	281,012	459,110

21    Zakat and income tax

	Note	December 31, 2017	December 31, 2016	January 1, 2016
Zakat payable	21.1	16,328	9,751	18,667
Income tax payable	21.2	47,966	-	9,798
Others		-	95	-
		64,294	9,846	28,465

35

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

21    Zakat and income tax (continued)

21.1    Zakat

A.    The principal elements of the zakat base are as follows:

	For the year ended December 31, 2017
Non-current assets	2,213,898
Spare parts and supplies	68,847
Non-current liabilities	1,771,189
Opening shareholders’ equity	668,734
Net income before zakat	850,990

Some of the amounts were adjusted in arriving at the zakat base for the years ended December 31, 2017 and 2016 by using 50% share of the Saudi partner.

The zakat for the year ended December 2016 was based on financial statements for the year ended December 31, 2016 prepared under SOCPA.

B.    The movement in zakat provision

The zakat is based on the financial statements of the Company. The movement in Company’s zakat provisions is as follows:

	For the year ended December 31, 2017	For the year ended December 31, 2016
At beginning of the year	9,751	18,667
Charged during the year	16,328	9,197
Excess provision for the prior years – net	(2,532)	(7,257)
Paid during the year	(7,219)	(10,856)
At end of the year	16,328	9,751

C.    Outstanding assessment and zakat status

The Company has submitted its zakat declarations till 2016 and obtained its certificate for this year. Zakat and income tax assessments have been finalized with GAZT up to 2013. During 2016, the GAZT issued final assessments for the years 2011 to 2013 with additional zakat, income tax and delay fines amounting to SAR 0.7 million which were paid by the Company in 2017. The GAZT did not issue assessments for the year 2014 onwards as these years are in process by the GAZT. Additional liabilities that may become payable in connection with zakat, income taxes, delay fines and costs related to the appeals, if any, will be borne by the partners of the Company.

21.2    Income Tax

A. The major components of income tax in the statement of profit and loss can be broken down as follows for the year ended 31 December:

	For the year ended December 31, 2017	For the year ended December 31, 2016
Current income tax
Current year	105,137	78,583
Adjustments in respect of current income tax of previous year	(2,356)	(1,290)
Deferred income tax
(Decrease) / increase in deferred tax assets	(3,214)	2,818
Total income tax expense reported in the statement of profit and loss	99,567	80,111

36

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

21    Zakat and income tax (continued)

B. The movement in current income tax provision

The movement in Company’s tax provisions is as follows:

	For the year ended December 31, 2017	For the year ended December 31, 2016
At beginning of the year	(1,886)	9,798
Charged during the year	105,137	78,583
Excess provision for the prior years – net	(2,356)	(1,290)
Paid during the year	(52,929)	(88,977)
At end of the year	47,966	(1,886)

C. The numerical tax charge reconciliation of income tax expense derived from the accounting profit is presented as follows:

	For the year ended December 31, 2017
Profit before income tax	850,990
Adjustments for amounts which are not deductible / (taxable) in calculating taxable income
Net difference in depreciation and amortization charge	173,260
Reversal of provisions for employee benefits	25,093
Reversal of allowance for inventory obsolescence	2,028
Net taxable profit	1,051,371
Income tax as per tax rate	20	%
Shareholding percentage	50	%
Income tax charge for the year	105,137

Some of the amounts were adjusted in arriving at the taxable net income for the year ended December 31, 2017 and 2016 by using 50% share of the Non-saudi partner.

The income tax charge for the year ended December 2016 was based on financial statements for the year ended December 31, 2016 prepared under SOCPA.

D. Components of deferred tax are as follows:

	December 31, 2017	December 31, 2016
Difference in accounting and tax base of:
Tangible assets	944	491
Employees benefits	19,601	17,647
Provisions	2,997	2,190
	23,542	20,328

37

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

22    Expenses and income

Based on the nature of the expenses, cost of sales and general and administrative expenses include the following expense for the year ended 31 December:

22.1    Cost of sales

	Note	For the year ended December 31, 2017	For the year ended December 31, 2016
Raw materials, consumables and change in finished products		1,398,009	986,985
Employees costs		104,921	103,653
Depreciation	7.1	116,163	108,355
Impairment	7.1	274,249	669,007
Others		94,261	95,301
		1,987,603	1,963,301

22.2    General and administrative expenses

	Note	For the year ended December 31, 2017	For the year ended December 31, 2016
Employees related costs		36,591	35,944
Shared Services Charges		22,978	22,768
Depreciation and amortization	7.1 & 8	12,096	6,924
General services		10,937	11,481
Training and development		9,854	5,564
Research and technology cost		9,141	6,528
Others		5,720	18,493
		107,317	107,702

22.3    Financial income

	For the year ended December 31, 2017	For the year ended December 31, 2016
On time deposits and advance with a related party	18,772	3,279
On time deposits with banks	128	345
	18,900	3,624

22.4    Finance cost

	For the year ended December 31, 2017	For the year ended December 31, 2016
On defined benefit plans	6,244	6,906
On embedded finance leases	1,031	710
On loans and borrowings	372	1,658
	7,647	9,274

38

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

23    Financial assets and financial liabilities

		As at December 31
Financial assets	Total	Loans and receivables	Held to maturity	Assets at fair value through the profit and loss	Derivatives used for hedging	Available for sale
2017:
Trade and other receivable	334,923	334,923	-	-	-	-
Cash and cash equivalents – Non-conventional	1,099,885	1,099,885	-	-	-	-
	1,434,808	1,434,808	-	-	-	-
2016:
Trade and other receivables	268,086	268,086	-	-	-	-
Cash and cash equivalents – Non-conventional	283,070	283,070	-	-	-	-
	551,156	551,156	-	-	-	-

The Company's exposure to various risks associated with the financial instruments is discussed in note 27. The maximum exposure to credit risk at the end of the reporting year is the carrying amount of each class of financial assets mentioned above.

Financial Liabilities	As at December 31
	Total	Liabilities at amortized cost
2017:
Loans and borrowings – non-conventional	1,402,029	1,402,029
Trade and other payables	211,438	211,438
	1,613,467	1,613,467
2016:
Loans and borrowings – non-conventional	1,427,092	1,427,092
Trade and other payables	153,280	153,280
	1,580,372	1,580,372

24    Fair value measurement

Fair value is the amount for which an asset could be exchanged, or a liability settled between knowledgeable willing parties in an arm’s length transaction. As the financial statements are prepared under the historical cost convention, differences can arise between the book values and fair value estimates. Management believes that the fair values of the financial assets and liabilities are not materially different from their carrying values.

As of December 31, 2017, 2016 and January 1, 2016 none of the financial instruments of the Company have been carried at fair value.

39

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

25    Conventional & non-conventional financing & investments

	December 31, 2017	December 31, 2016
Cash and cash equivalents – non-conventional
Current Murabaha (including fixed term deposits) – with related party	986,250
Current Murabaha (including fixed term deposits) – with banks	-	221,250
Current accounts (excluding fixed term deposits)	113,635	61,820
	1,099,885	283,070
Borrowings
Embedded finance leases – conventional	5,637	5,846
Murabaha facilities - non-conventional	1,396,392	1,421,246
	1,402,029	1,427,092
Borrowing cost capitalized – non-conventional
Murabaha facilities	43,325	38,617
Financial income – non-conventional
Murabaha with related parties (time deposits and advances)	18,772	3,279
Murabaha with banks (time deposits)	128	345
	18,900	3,624
Finance cost -conventional
Interest expenses related to defined benefit plans	6,244	6,906
Interest expenses on embedded finance leases	1,031	710
	7,275	7,616
Murabaha facilities (non-conventional)	372	1,658
	7,647	9,274

26    Related party transactions and balances

26.1 Related Party Transactions

Shareholders of the Company are detailed in note 1.

	Transactions during the year
	Sales, services to related parties	Purchases from related parties	Financial income from a related party	Dividends
2017:
SABIC and its affiliates	3,059,730	504,755	18,772	-
Foreign partner	37,268	21,874	-	-
2016:
SABIC and its affiliates	2,243,061	489,651	3,279	212,547
Foreign partner	-	19,956	-	157,188

40

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

26    Related party transactions and balances (continued)

Significant transaction with related parties was as follows:

a) The Company has a service level agreement with SABIC (Shared Services Organization – SSO) for the provision of accounting, warehousing, human resources, information technology (ERP/SAP), transporting and arranging for delivery of materials related to the Company's spare parts, engineering, procurement and related services and other general services to the Company. The Company also has legal service and centralized treasury agreements with SABIC.

b) The Company also has logistic service agreements with SABIC affiliates (SABTANK & SSCS).

c) The Company has a service level agreement with Celanese Corporation for the provision of technical, engineering and commissioning support services to the Company.

d) Advances to SABIC represent the amount paid by the Company according to shared service agreement to finance the purchase of the Company’s materials and services.

e) The partners also provide the Company with certain required technical, research and development, administrative and other services in accordance with executed agreements. The Company has a Technology and Innovation Service agreement with SABIC, under which SABIC provides research and development services to the Company. The Company is required to pay an annual fee under the agreement, which is calculated at one percent of Methanol sales plus the lesser of US $ 1 million or one percent of MTBE sales, which is charged to general and administrative expenses in the statement of income. The Company also has POM licensing/sub-licensing agreement with SABIC, Celanese Corporation and Celanese Corporation affiliates.

f) The majority of Company's products are sold to SABIC and foreign partner’s affiliates, under marketing and off-take agreements. Upon delivery of the product, sales are recorded at net provisional price which are subsequently adjusted, on a monthly basis, to actual selling prices received by SABIC and foreign partner’s affiliates from its customers after deducting shipping, distribution and selling cost, and a marketing fee to cover all other marketing expenses.

Prices and terms of payments for the above transactions are approved by the Company's management.

Terms and conditions of transactions with related parties

The sales to and purchases from related parties are made at terms equivalent to those that prevail in arm’s length transactions. Outstanding balances at the year ended 31 December 2017 are unsecured, interest free and settled in cash. There have been no guarantees provided or received for any related party receivables or payables. For the year ended 31 December 2017, the Company has not recorded any impairment of receivables relating to amounts owed by related parties.

26.2 List of related parties and nature of relationship

Name	Relationship
Saudi Arabian Basic Industries Corporation (SABIC)	Partner
CTE Petrochemicals Company	Partner
Arabian Petrochemical Company and its subsidiaries (Petrokemya Group)	Partners’ affiliate
Saudi Iron and Steel Company (Hadeed)	Partners’ affiliate
SABIC Terminal Services Company Limited (Sabtank)	Partners’ affiliate
SABIC Supply Chain Services Limited Company (SSCS)	Partners’ affiliate
Saudi Petrochemical Company (Sadaf)	Partners’ affiliate
Saudi European Petrochemical Company (Ibn Zahr)	Partners’ affiliate
Jubail United Petrochemical Company (United)	Partners’ affiliate
National Chemical Fertiliser Company (Ibn Al-Baytar)	Partners’ affiliate
National Industrial Gases Company (Gas)	Partners’ affiliate

41

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

26    Related party transactions and balances (continued)

Yanbu National Petrochemical Company (Yansab)	Partners’ affiliate
Saudi Methanol Company (Ar-Razi)	Partners’ affiliate
Al-Jubail Fertiliser Company (Al-Bayroni)	Partners’ affiliate
Saudi Yanbu Petrochemical Company (Yanpet)	Partners’ affiliate
Eastern Petrochemical Company (Sharq)	Partners’ affiliate
26.2 List of related parties and nature of relationship (continued)
Name	Relationship
Al-Jubail Petrochemical Company (Kemya)	Partners’ affiliate
Saudi Japanese Acrylonitrile Company (Shrouq)	Partners’ affiliate
Saudi Methacrylates Company (Samac)	Partners’ affiliate
Arabian Industrial Fibers Company (Ibn Rushd)	Partners’ affiliate
Saudi Arabian Fertiliser Company (Safco)	Partners’ affiliate
Saudi Kayan Petrochemical Company (Saudi Kayan)	Partners’ affiliate
Celanese Corporation	Partners’ Parent Company
Celanese Europe BV	Partners’ affiliate
Celanese (Nanjing) Diversified Chemicals Co. Ltd.	Partners’ affiliate
Celanese (Shanghai) International Trading Co. Ltd.	Partners’ affiliate
Celanese Production Germany GmbH & Co KG	Partners’ affiliate

26.3    Transactions with Entities controlled by Saudi Government

	Transactions during the year		Balances
	Sales of goods	Purchases of goods and services	Amounts owed by entities controlled by Saudi Government	Amounts owed to entities controlled by Saudi Government
2017	-	1,518,379	-	139,921
2016	-	1,251,863	2,496	100,255

26.4    Key management personnel compensation

Remuneration for the year ended 31 December of key management can be detailed as follows:

	For the year ended December 31, 2017	For the year ended December 31, 2016
Short-term employee benefits	9,833	8,395
Long-term benefits	1,146	1,197
	10,979	9,592

In addition to their remunerations to key management personnel, the Company also provides non-cash benefits to key management personnel and contributes to a post-employment defined benefit plan on their behalf.

27    Financial risk management

Overview

Risk management activities are governed at Partners level. The Company has exposure to the following risks from its use of financial instruments:

• Credit risk

• Liquidity risk

• Market risk

42

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

27    Financial risk management (continued)

This note presents information about the Company’s exposure to each of the above risks, the Company’s objectives, policies and processes for measuring and managing risk, and the Company’s management of capital. Further quantitative disclosures are included throughout these financial statements.

Risk management framework

The management has overall responsibility for the establishment and oversight of the Company’s risk management framework.

The Company’s risk management practices are established to identify and analyze the risks faced by the Company, to set appropriate risk limits and controls, and to monitor risks and adherence to limits. Risk management practices are reviewed regularly to reflect changes in market conditions and the Company’s activities. The Company, through its training and management standards and procedures, aims to develop a disciplined and constructive control environment in which all employees understand their roles and obligations.

The Company’s Board oversees how management monitors the Company’s risk.

Credit risk

Credit risk is the risk of financial loss to the Company if a customer or counterparty to a financial instrument fails to meet its contractual obligations, and arises principally from the Company’s receivables from customers.

Credit risk concentration

Credit risk concentrations arise when a number of counterparties are engaged in similar business activities, or activities in the same geographical region, or have economic features that would cause their ability to meet contractual obligations to be similarly affected by changes in economic, political or other conditions. Concentrations indicate the relative sensitivity of the Company’s performance to developments affecting a particular industry. This type of risk management activities are governed at Partners level.

Trade and other receivables

The Company trades only with the Partners’ and its affiliates under off take marketing agreements. In addition, receivable balances are monitored on ongoing basis and the Company’s exposure to bad debts is not significant.

Purchase limits are established for each partner under off take agreements and the partners are lifting quantities as per their entitlement.

Time deposits

Management actively monitors credit ratings. Currently, the Company has time deposits with SABIC only.

Guarantees

The Company monitors its risk to shortage of funds using cash flow forecasting to assess the impacts of operational activities on overall liquidity availability. The Company’s objective is to maintain a balance between continuity of funding and flexibility through the use of bank overdrafts and the revolving credit facilities under a short-term facility agreement with a bank.

Credit risk quality

External rating of cash and cash equivalents	A1	A3	Baa1	Others *	Total
Carrying value as at December 31,
2017	113,635	-	-	986,250	1,099,885
2016	61,821	105,000	116,249	-	283,070

* These are time deposits placed with SABIC.

43

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

27    Financial risk management (continued)

Liquidity risk

Liquidity risk is the risk that the Company will encounter difficulty in meeting the obligations associated with its financial liabilities that are settled by delivering cash or another financial asset. The Company’s approach to

managing liquidity is to ensure, as far as possible, that it will always have sufficient liquidity to meet its liabilities when due, under both normal and stressed conditions, without incurring unacceptable losses or risking damage to the Company’s reputation.

The Company ensures that it has sufficient cash on demand to meet expected operational expenses, including the servicing of financial obligations; this excludes the potential impact of extreme circumstances that cannot reasonably be predicted and force majeure events, such as natural disasters. In addition, the Company has line of credit.

The table below summarizes the maturity profile of the Company’s financial liabilities based on contractual undiscounted payments:

	December 31
	Within 1 year	Between 1-5 years	More than 5 years	Total
2017:
Interest bearing loans and borrowings	187,627	750,508	458,257	1,396,392
Trade and other payable	211,438	-	-	211,438
	399,065	750,508	458,257	1,607,830
2016:
Interest bearing loans and borrowings	187,423	749,692	484,131	1,421,246
Trade and other payables	153,280	-	-	153,280
	340,703	749,692	484,131	1,574,526

Market risk

Market risk is the risk that changes in market prices, such as foreign exchange rates and interest rates will affect the Company’s income or the value of its holding of financial instruments. The objective of market risk management is to manage and control market risk exposures within acceptable parameters, while optimizing the return.

Currency risk

The Company exposure to currency risk is insignificant as majority of the transactions are denominated in US dollars, which is pegged to Saudi Riyals historically. In respect of other monetary assets and liabilities denominated in foreign currencies, the Company ensures that its net exposure is kept to an acceptable level by buying or selling foreign currencies at spot rates when necessary to address short-term imbalances.

Exposure to foreign currency risk at the end of the reporting year was as follows:

	USD	EUR	GBP	CHF	AED	CAD	Others	Total
2017:
Cash and cash equivalents	1,068,503	-	-	-	-	-	-	1,068,503
Trade and other receivables	317,294	-	-	-	-	-	-	317,294
Term loan	(817,714)	-	-	-	-	-	-	(817,714)
Trade and other payables	(167,033)	(1,646)	(28)	-	(32)	(16)	(6)	(168,761)
Total net monetary exposure	401,050	(1,646)	(28)	-	(32)	(16)	(6)	399,322

44

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

27    Financial risk management (continued)

Currency risk (continued)

	USD	EUR	GBP	CHF	AED	CAD	Others	Total
2016:
Cash and bank	245,371	-	-	-	-	-	-	245,371
Fixed term deposits		-	-	-	-	-	-
Trade and other receivables	259,292	-	-	-	-	-	-	259,292
Term loan	(791,583)	-	-	-	-	-	-	(791,583)
Trade and other Payables	(103,338)	(2,218)	(28)	(91)	(26)	(16)	(1)	(105,718)
Total net monetary exposure	(390,258)	(2,218)	(28)	(91)	(26)	(16)	(1)	(392,638)

Interest rate risk

Interest rate risk is the risk that the fair value or future cash flows of a financial instrument will fluctuate because of changes in market interest rates. The Company’s exposure to the risk of changes in market rates relates primarily to the Company’s long-term debt obligations with floating interest rates.

The Company monitors the fluctuations in market rates upon significant changes and assess the impact on Company’s performance.

Commodity risk

The Company is exposed to the impact of market fluctuations of the price of various inputs to production, mainly butane, natural gas and utilities. From time to time, the Company manages some elements of commodity price risk through the use of fixed price contracts which are regulated by government. Butane price is relatively co-related to sales price of the final product (MTBE).

Capital management

Capital is equity attributable to the Partners of the Company. The primary objective to the Company’s capital management is to support its business and maximize shareholders value.

The Board’s policy is to maintain an optimum capital base so as to maintain Partners and creditors confidence and to sustain future development of the business. The Company manages its capital structure and makes adjustments to it, in light of change in economic conditions. The Board of Directors also monitors the level of dividends. The Company’s net debt to equity ratio at the end of the reporting year was as follows:

	December 31, 2017	December 31, 2016
Total liabilities	2,501,510	2,372,634
Less: cash and cash equivalents	(1,099,885)	(283,070)
Net debt	1,401,625	2,089,564
Total equity	1,402,058	668,734
Net Debt to equity ratio as of 31 December	1	3

28    Commitments and contingencies

Capital commitments

At 31 December 2017, the Company had commitments of SR 306.8 million (2016: SR 287.7 million and January 1, 2016: SR 308.7 million) relating to capital expenditures.

Contingent liabilities

The Company’s bankers have issued, on its behalf, bank guarantees amounting to SR 2 million (2016: 2 million) in the normal course of business.

45

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

28    Commitments and contingencies (continued)

Contingent liabilities (continued)

During the year, the Company received a claim from its engineering, procurement and construction (“EPC”) vendor related to POM Project. The Company has a right to liquidity damages, per agreements with the EPC vendor. The Company is currently under discussion with EPC vendor for the claim and counter claim. The resultant outcome for the claim and counter claim cannot be estimated at this stage; accordingly no provision has been recorded in these financial statements.

The Company is involved in litigation matters in the ordinary course of business, which are being defended. While the ultimate results of these matters cannot be determined with certainty, the Company’s management does not expect that they will have a material adverse effect on the financial statements of the Company.

Operating lease commitments

The Company has entered into operating leases on certain motor vehicles and items of machinery. Future minimum rentals payable under non-cancellable operating leases as at 31 December are, as follows:

	December 31, 2017	December 31, 2016	January 1, 2016
Within one year	11,353	12,043	9,124
After one year but not more than five years	33,545	44,993	40,295
	44,898	57,036	49,419

29 Summary of principal differences between IFRS as endorsed in KSA and generally accepted accounting principles in the United States (US GAAP)

The Company is a Saudi limited liability company registered in KSA and prepares its financial statements in accordance with IFRS as endorsed in KSA. IFRS as endorsed in KSA varies in certain respects from US GAAP. The material differences between accounting principles, practices and methods under IFRS as endorsed in KSA and US GAAP and their effect on net income, other comprehensive income and equity for the years ended December 31, 2017 and 2016 are presented below, with an explanation of the adjustments.  There are no material effects on the statements of financial position or cash flows under IFRS as endorsed in KSA for the purposes of reconciliation to US GAAP, other than the corresponding impact of below stated adjustments.

(a)Reconciliation of net income for the year

	December 31, 2017	December 31, 2016
Net income under IFRS as endorsed in KSA	737,627	13,790
Adjustments:
(i)   Impairment	274,249	669,007
(ii) Actuarial valuation adjustments for end of service benefits,  net of related deferred income tax impact	2,381	(17,847)
Net income under US GAAP	1,014,257	664,950

(b)Reconciliation of other comprehensive income for the year

	December 31, 2017	December 31, 2016
Other comprehensive income under IFRS as endorsed in KSA	(4,303)	11,417
Adjustments:
(i) Actuarial valuation adjustments for end of service benefits,      net of related deferred income tax impact	24,675	83,870
Other comprehensive income under US GAAP	20,372	95,287

46

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

29 Summary of principal differences between IFRS as endorsed in KSA and generally accepted accounting principles in the United States (US GAAP) (continued)

(c)Reconciliation of equity

	December 31, 2017	December 31, 2016
Equity under IFRS as endorsed in KSA	1,402,058	668,734
Adjustments:
(i) Impairment	943,256	669,007
(ii) Actuarial valuation adjustments for end of service benefits,       net of related deferred income tax impact	(9,558)	(36,616)
Equity under US GAAP	2,335,756	1,301,125

(d)  Summary of reconciling items to US GAAP

(i)Impairment

IFRS as endorsed in KSA requires impairment testing of all non-current assets where impairment indicators exist. Management performed impairment testing of its POM plant under construction as of December 31, 2017 and 2016. The resultant value in use computed for the POM plant under construction resulted in undiscounted cash flows higher than the carrying value of the POM plant under construction; accordingly, no impairment loss was recorded under US GAAP. IFRS as endorsed in KSA requires to compute value in use considering discounted cash flow technique. The discounted cash flows resulted in value in use lower than the carrying amount of the POM plant under construction, accordingly impairment loss of SAR 274.2 million was recorded during December 31, 2017 (2016: SAR 669 million) in the accompanying statement of income.. As of December 31, 2017 and 2016, POM plant was under construction. Impairment loss recorded in these financial statements prepared in accordance with IFRS as endorsed in KSA has no depreciation differential impact on net income reported under IFRS as endorsed in KSA compared to net income reported under US GAAP.

(ii)Actuarial valuation adjustment for end of service benefits

Management performed actuarial valuation for the defined benefit plan (end of service benefits) previously for the purpose of preparing reconciliation between previously enacted Saudi GAAP and US GAAP. During transition to IFRS as endorsed in KSA, actuarial valuation were performed for the defined benefit plan (end of service benefits) in accordance with requirements of IFRS as endorsed in KSA. For the purpose of reconciling IFRS as endorsed in KSA compared to US GAAP, the actuarial valuation adjustment differential (including related deferred income tax) between IFRS as endorsed in KSA and US GAAP are included in the reconciliation of net income, other comprehensive income and equity.

30    Comparative figures

For all periods up to and including the year ended December 31, 2016, the Company prepared its financial statements in accordance with Generally Accepted Accounting Principles (GAAP) issued by SOCPA in KSA. As noted in note 2.1, these financial statements are the Company’s first such financial statements in accordance with the IFRS as endorsed in KSA.

Accordingly, the Company has applied the IFRS as endorsed in KSA for preparation of its financial statements for the year beginning January 1, 2017, as well as for presenting the relevant comparative year data. In compliance with requirements of IFRS 1 endorsed in KSA, the Company’s opening statement of financial position was prepared as at January 1, 2016 after incorporating required adjustments to reflect the transition to IFRS as endorsed in KSA from the previous SOCPA GAAP. The Company has analyzed the impact on the statement of financial positions as at January 1, 2016 and December 31, 2016 and significant adjustments in transitioning from SOCPA GAAP to IFRS as endorsed in KSA are disclosed in note 6 of these financial statements.

Accordingly, summary of principal differences between IFRS as endorsed in KSA and US GAAP are included in note 29 of these financial statements for the years ended December 31, 2017 and 2016 which includes adjustments described in note 6 of these financial statements and adjustments related to principal differences between IFRS as endorsed in KSA and US GAAP.

47

NATIONAL METHANOL COMPANY (IBN SINA)

(A SAUDI LIMITED LIABILITY COMPANY)

NOTES TO THE FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2017 AND 2016

(All amounts in Saudi Riyals (‘000) unless otherwise stated)

31    Subsequent events

In the opinion of management, there have been no significant subsequent events since the year ended December 31, 2017 that would have a material impact on the financial position of the Company as reflected in these financial statements.

32    Approval of financial statements

These financial statements have been approved by the management of the Company on February 9, 2018.

48

XML

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2017	Feb. 02, 2018	Jun. 30, 2017
Document And Entity Information [Abstract]
Entity Registrant Name	CELANESE CORPORATION
Entity Central Index Key	0001306830
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		135,817,634
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 13,017,711,601

XML

Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net sales	$ 6,140	$ 5,389	$ 5,674
Cost of sales	(4,625)	(3,984)	(4,356)
Gross profit	1,515	1,405	1,318
Selling, general and administrative expenses	(456)	(416)	(506)
Amortization of intangible assets	(20)	(9)	(11)
Research and development expenses	(72)	(78)	(119)
Other (charges) gains, net	(60)	(11)	(351)
Foreign exchange gain (loss), net	(1)	(1)	4
Gain (loss) on disposition of businesses and assets, net	(5)	3	(9)
Operating profit (loss)	901	893	326
Equity in net earnings (loss) of affiliates	183	155	181
Interest expense	(122)	(120)	(119)
Refinancing expense	0	(6)	0
Interest income	2	2	1
Dividend income - cost investments	108	108	107
Other income (expense), net	3	(2)	(8)
Earnings (loss) from continuing operations before tax	1,075	1,030	488
Income tax (provision) benefit	(213)	(122)	(201)
Earnings (loss) from continuing operations	862	908	287
Earnings (loss) from operation of discontinued operations	(16)	(3)	(3)
Gain (loss) on disposition of discontinued operations	0	0	0
Income tax (provision) benefit from discontinued operations	3	1	1
Earnings (loss) from discontinued operations	(13)	(2)	(2)
Net earnings (loss)	849	906	285
Net (earnings) loss attributable to noncontrolling interests	(6)	(6)	19
Net earnings (loss) attributable to Celanese Corporation	843	900	304
Amounts attributable to Celanese Corporation
Earnings (loss) from continuing operations	856	902	306
Earnings (loss) from discontinued operations	(13)	(2)	(2)
Net earnings (loss)	$ 843	$ 900	$ 304
Earnings (loss) per common share - basic
Continuing operations	$ 6.21	$ 6.22	$ 2.03
Discontinued operations	(0.10)	(0.01)	(0.01)
Net earnings (loss) - basic	6.11	6.21	2.02
Earnings (loss) per common share - diluted
Continuing operations	6.19	6.19	2.01
Discontinued operations	(0.10)	(0.01)	(0.01)
Net earnings (loss) - diluted	$ 6.09	$ 6.18	$ 2.00
Weighted average shares - basic	137,902,667	144,939,433	150,838,050
Weighted average shares - diluted	138,317,395	145,668,181	152,287,955

XML

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net earnings (loss)	$ 849	$ 906	$ 285
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	(1)	0	0
Foreign currency translation	174	(11)	(188)
Gain (loss) on cash flow hedges	(1)	5	2
Pension and postretirement benefits	9	(4)	3
Total other comprehensive income (loss), net of tax	181	(10)	(183)
Total comprehensive income (loss), net of tax	1,030	896	102
Comprehensive (income) loss attributable to noncontrolling interests	(6)	(6)	19
Comprehensive income (loss) attributable to Celanese Corporation	$ 1,024	$ 890	$ 121

XML

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2017		Dec. 31, 2016
Current Assets
Cash and cash equivalents (variable interest entity restricted - 2017: $19; 2016: $18)	$ 576		$ 638
Trade receivables - third party and affiliates (net of allowance for doubtful accounts - 2017: $9; 2016: $6; variable interest entity restricted - 2017: $5; 2016: $4)	986		801
Non-trade receivables, net	244		223
Inventories	900		720
Marketable securities, at fair value	32		30
Other assets	54		60
Total current assets	2,792		2,472
Investments in affiliates	976		852
Property, plant and equipment (net of accumulated depreciation - 2017: $2,584; 2016: $2,239; variable interest entity restricted - 2017: $697; 2016: $734)	3,762		3,577
Deferred income taxes	366		159
Other assets (variable interest entity restricted - 2017: $6; 2016: $9)	338		307
Goodwill	1,003	[1]	796
Intangible assets, net (variable interest entity restricted - 2017: $25; 2016: $26)	301		194
Total assets	9,538		8,357
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	326		118
Trade payables - third party and affiliates	807		625
Other liabilities	354		322
Income taxes payable	72		12
Total current liabilities	1,559		1,077
Long-term debt, net of unamortized deferred financing costs	3,315		2,890
Deferred income taxes	211		130
Uncertain tax positions	156		131
Benefit obligations	585		893
Other liabilities	413		215
Commitments and Contingencies
Stockholders' Equity
Preferred stock, $0.01 par value, 100,000,000 shares authorized (2017 and 2016: 0 issued and outstanding)	0		0
Treasury stock, at cost (2017: 32,387,713 shares; 2016: 26,950,910 shares)	(2,031)		(1,531)
Additional paid-in capital	175		157
Retained earnings	4,920		4,320
Accumulated other comprehensive income (loss), net	(177)		(358)
Total Celanese Corporation stockholders' equity	2,887		2,588
Noncontrolling interests	412		433
Total equity	3,299		3,021
Total liabilities and equity	9,538		8,357
Series A common stock, $0.0001 par value, 400,000,000 shares authorized (2017: 168,156,969 issued and 135,769,256 outstanding; 2016: 167,611,357 issued and 140,660,447 outstanding)
Stockholders' Equity
Common stock	0		0
Series B common stock, $0.0001 par value, 100,000,000 shares authorized (2017 and 2016: 0 issued and outstanding)
Stockholders' Equity
Common stock	$ 0		$ 0

[1] There were $0 million of accumulated impairment losses as of December 31, 2017.

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Current Assets
Allowance for doubtful accounts - trade receivables	$ 9	$ 6
Accumulated depreciation	2,584	2,239
Cash and cash equivalents (variable interest entity restricted - 2017: $19; 2016: $18)	576	638
Trade receivables - third party and affiliates (net of allowance for doubtful accounts - 2017: $9; 2016: $6; variable interest entity restricted - 2017: $5; 2016: $4)	986	801
Property, plant and equipment (net of accumulated depreciation - 2017: $2,584; 2016: $2,239; variable interest entity restricted - 2017: $697; 2016: $734)	3,762	3,577
Other assets (variable interest entity restricted - 2017: $6; 2016: $9)	338	307
Intangible assets, net (variable interest entity restricted - 2017: $25; 2016: $26)	$ 301	$ 194
Stockholders' Equity
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Treasury stock, shares	32,387,713	26,950,910
Common stock, par value	$ 0.0001
Series A common stock, $0.0001 par value, 400,000,000 shares authorized (2017: 168,156,969 issued and 135,769,256 outstanding; 2016: 167,611,357 issued and 140,660,447 outstanding)
Stockholders' Equity
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	400,000,000	400,000,000
Common stock, shares issued	168,156,969	167,611,357
Common stock, shares outstanding	135,769,256	140,660,447
Series B common stock, $0.0001 par value, 100,000,000 shares authorized (2017 and 2016: 0 issued and outstanding)
Stockholders' Equity
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	0	0
Common stock, shares outstanding	0	0
Variable Interest Entity, Primary Beneficiary [Member]
Current Assets
Cash and cash equivalents (variable interest entity restricted - 2017: $19; 2016: $18)	$ 19	$ 18
Trade receivables - third party and affiliates (net of allowance for doubtful accounts - 2017: $9; 2016: $6; variable interest entity restricted - 2017: $5; 2016: $4)	5	4
Property, plant and equipment (net of accumulated depreciation - 2017: $2,584; 2016: $2,239; variable interest entity restricted - 2017: $697; 2016: $734)	697	734
Other assets (variable interest entity restricted - 2017: $6; 2016: $9)	6	9
Intangible assets, net (variable interest entity restricted - 2017: $25; 2016: $26)	$ 25	$ 26

XML

Consolidated Statements of Equity - USD ($) $ in Millions	Total		Series A Common Stock [Member]	Treasury Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss), Net [Member]	Noncontrolling Interests [Member]	InfraServ Gmbh & Co. Hoechst KG [Member]
Cumulative Effect on Retained Earnings, Net of Tax						$ 0
Balance as of the beginning of the period, shares at Dec. 31, 2014			152,902,710	13,266,625
Balance as of the beginning of the period at Dec. 31, 2014								$ 260
Balance as of the beginning of the year at Dec. 31, 2014			$ 0	$ (611)	$ 103	3,491	$ (165)
Stock option exercises, net of tax			$ 0		5
Stock option exercises, shares			94,147
Purchases of treasury stock, shares			(6,649,865)
Purchases of treasury stock			$ 0
Stock awards, shares			435,305
Stock awards			$ 0
Purchases of treasury stock, shares	6,640,601	[1]		6,649,865
Purchases of treasury stock, including related fees	$ (420)			$ (420)
Stock-based compensation, net of tax					28
Net earnings (loss) attributable to Celanese Corporation	304					304
Series A common stock dividends						(174)
Other comprehensive income (loss), net of tax	(183)						(183)
Balance as of the end of the year at Dec. 31, 2015	2,378		$ 0	$ (1,031)	136	3,621	(348)
Balance as of the end of the period, shares at Dec. 31, 2015			146,782,297	19,916,490
Net earnings (loss) attributable to noncontrolling interests	(19)							(19)
(Distributions to) contributions from noncontrolling interests								210
Balance as of the end of the period at Dec. 31, 2015								451
Total equity at Dec. 31, 2015	$ 2,829
Dividends, Share-based Compensation, Paid-in-kind						0
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests									$ 0
Cumulative Effect on Retained Earnings, Net of Tax						0
Stock option exercises, net of tax			$ 0		13
Stock option exercises, shares			194,872
Purchases of treasury stock, shares			(7,034,420)
Purchases of treasury stock			$ 0
Stock awards, shares			717,698
Stock awards			$ 0
Purchases of treasury stock, shares	7,034,420			7,034,420
Purchases of treasury stock, including related fees	$ (500)			$ (500)
Stock-based compensation, net of tax					8
Net earnings (loss) attributable to Celanese Corporation	900					900
Series A common stock dividends						(201)
Other comprehensive income (loss), net of tax	(10)						(10)
Balance as of the end of the year at Dec. 31, 2016	2,588		$ 0	$ (1,531)	157	4,320	(358)
Balance as of the end of the period, shares at Dec. 31, 2016			140,660,447	26,950,910
Net earnings (loss) attributable to noncontrolling interests	6							6
(Distributions to) contributions from noncontrolling interests								(24)
Balance as of the end of the period at Dec. 31, 2016	433							433
Total equity at Dec. 31, 2016	$ 3,021
Dividends, Share-based Compensation, Paid-in-kind						0
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests									0
Cumulative Effect on Retained Earnings, Net of Tax						(1)
Stock option exercises, net of tax			$ 0		1
Stock option exercises, shares			20,151
Purchases of treasury stock, shares			(5,436,803)
Purchases of treasury stock			$ 0
Stock awards, shares			525,461
Stock awards			$ 0
Purchases of treasury stock, shares	5,436,803			5,436,803
Purchases of treasury stock, including related fees	$ (500)			$ (500)
Stock-based compensation, net of tax					23
Net earnings (loss) attributable to Celanese Corporation	843					843
Series A common stock dividends						(241)
Other comprehensive income (loss), net of tax	181						181
Balance as of the end of the year at Dec. 31, 2017	2,887		$ 0	$ (2,031)	$ 175	4,920	$ (177)
Balance as of the end of the period, shares at Dec. 31, 2017			135,769,256	32,387,713
Net earnings (loss) attributable to noncontrolling interests	6							6
(Distributions to) contributions from noncontrolling interests								(27)
Balance as of the end of the period at Dec. 31, 2017	412							$ 412
Total equity at Dec. 31, 2017	$ 3,299
Dividends, Share-based Compensation, Paid-in-kind						$ (1)
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests									$ (6)

[1] The year ended December 31, 2015 excludes 9,264 shares withheld from an executive officer to cover statutory minimum withholding requirements for personal income taxes related to the vesting of restricted stock. Restricted stock awards are considered outstanding at the time of issuance. Accordingly, the shares withheld are treated as treasury shares.

XML

Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Activities
Net earnings (loss)	$ 849	$ 906	$ 285
Adjustments to reconcile net earnings (loss) to net cash provided by (used in) operating activities
Asset impairments	0	2	126
Depreciation, amortization and accretion	310	295	363
Pension and postretirement net periodic benefit cost	(80)	(54)	(52)
Pension and postretirement contributions	(363)	(350)	(63)
Actuarial (gain) loss on pension and postretirement plans	46	103	127
Pension curtailments and settlements, net	0	0	(3)
Deferred income taxes, net	(152)	83	42
(Gain) loss on disposition of businesses and assets, net	5	2	8
Stock-based compensation	47	31	40
Undistributed earnings in unconsolidated affiliates	(52)	(24)	(5)
Other, net	12	15	7
Operating cash provided by (used in) discontinued operations	8	2	(2)
Changes in operating assets and liabilities
Trade receivables - third party and affiliates, net	(110)	(59)	61
Inventories	(97)	8	62
Other assets	(7)	39	(17)
Trade payables - third party and affiliates	126	7	(111)
Other liabilities	261	(113)	(6)
Net cash provided by (used in) operating activities	803	893	862
Investing Activities
Capital expenditures on property, plant and equipment	(267)	(246)	(232)
Acquisitions, net of cash acquired	(269)	(178)	(6)
Proceeds from sale of businesses and assets, net	1	12	4
Capital expenditures related to Fairway Methanol LLC	0	0	(288)
Other, net	(14)	(27)	(36)
Net cash provided by (used in) investing activities	(549)	(439)	(558)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	111	(352)	350
Proceeds from short-term borrowings	182	53	80
Repayments of short-term borrowings	(124)	(90)	(83)
Proceeds from long-term debt	351	1,509	0
Repayments of long-term debt	(77)	(1,127)	(24)
Purchases of treasury stock, including related fees	(500)	(500)	(420)
Stock option exercises	1	6	3
Series A common stock dividends	(241)	(201)	(174)
(Distributions to) contributions from noncontrolling interests	(27)	(24)	214
Other, net	(27)	(33)	(12)
Net cash provided by (used in) financing activities	(351)	(759)	(66)
Exchange rate effects on cash and cash equivalents	35	(24)	(51)
Net increase (decrease) in cash and cash equivalents	(62)	(329)	187
Cash and cash equivalents as of beginning of period	638	967	780
Cash and cash equivalents as of end of period	$ 576	$ 638	$ 967

XML

Description of the Company and Basis of Presentation

12 Months Ended

Dec. 31, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Description of the Company and Basis of Presentation

Description of the Company and Basis of Presentation

Description of the Company

Celanese Corporation and its subsidiaries (collectively, the "Company") is a global technology and specialty materials company. The Company's business involves processing chemical raw materials, such as methanol, carbon monoxide and ethylene, and natural products, including wood pulp, into value-added chemicals, thermoplastic polymers and other chemical-based products.

Definitions

In this Annual Report on Form 10-K ("Annual Report"), the term "Celanese" refers to Celanese Corporation, a Delaware corporation, and not its subsidiaries. The term "Celanese US" refers to the Company's subsidiary, Celanese US Holdings LLC, a Delaware limited liability company, and not its subsidiaries.

Basis of Presentation

The consolidated financial statements contained in this Annual Report were prepared in accordance with accounting principles generally accepted in the United States of America ("US GAAP") for all periods presented and include the accounts of the Company, its majority owned subsidiaries over which the Company exercises control and, when applicable, variable interest entities in which the Company is the primary beneficiary. The consolidated financial statements and other financial information included in this Annual Report, unless otherwise specified, have been presented to separately show the effects of discontinued operations.

In the ordinary course of business, the Company enters into contracts and agreements relative to a number of topics, including acquisitions, dispositions, joint ventures, supply agreements, product sales and other arrangements. The Company endeavors to describe those contracts or agreements that are material to its business, results of operations or financial position. The Company may also describe some arrangements that are not material but in which the Company believes investors may have an interest or which may have been included in a Form 8-K filing. Investors should not assume the Company has described all contracts and agreements relative to the Company's business in this Annual Report.

For those consolidated ventures in which the Company owns or is exposed to less than 100% of the economics, the outside stockholders' interests are shown as noncontrolling interests.

The Company has reclassified certain prior period amounts to conform to the current period's presentation.

XML

Summary of Accounting Policies

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Summary of Accounting Policies

Summary of Accounting Policies

Critical Accounting Policies

Recoverability of Goodwill and Indefinite-Lived Assets

The Company assesses the recoverability of the carrying amount of its reporting unit goodwill and indefinite-lived intangible assets either qualitatively or quantitatively annually during the third quarter of its fiscal year using June 30 balances or whenever events or changes in circumstances indicate that the carrying amount of the asset may not be fully recoverable. The Company assesses the recoverability of finite-lived intangible assets in the same manner as for property, plant and equipment. Impairment losses are generally recorded in Other (charges) gains, net in the consolidated statements of operations.

Recoverability of the carrying amount of goodwill is measured at the reporting unit level. In performing a quantitative analysis, the Company measures the recoverability of goodwill for each reporting unit using a discounted cash flow model incorporating discount rates commensurate with the risks involved, which is classified as a Level 3 fair value measurement. The key assumptions used in the discounted cash flow valuation model include discount rates, growth rates, tax rates, cash flow projections and terminal value rates. Discount rates, growth rates and cash flow projections are the most sensitive and susceptible to change as they require significant management judgment. Discount rates used are similar to the rates estimated by the weighted average cost of capital ("WACC") considering any differences in company-specific risk factors. The Company may engage third-party valuation consultants to assist with this process.

Management tests indefinite-lived intangible assets for impairment quantitatively utilizing the relief from royalty method under the income approach to determine the estimated fair value for each indefinite-lived intangible asset, which is classified as a Level 3 fair value measurement. The relief from royalty method estimates the Company's theoretical royalty savings from ownership of the intangible asset. The key assumptions used in this model include discount rates, royalty rates, growth rates, tax rates, sales projections and terminal value rates. Discount rates, royalty rates, growth rates and sales projections are the assumptions most sensitive and susceptible to change as they require significant management judgment. Discount rates used are similar to the rates estimated by the WACC considering any differences in company-specific risk factors. Royalty rates are established by management and are periodically substantiated by third-party valuation consultants.

Environmental Liabilities

The Company manufactures and sells a diverse line of chemical products throughout the world. Accordingly, the Company's operations are subject to various hazards incidental to the production of industrial chemicals including the use, handling, processing, storage and transportation of hazardous materials. The Company recognizes losses and accrues liabilities relating to environmental matters if available information indicates that it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. Depending on the nature of the site, the Company accrues through 15 years, unless the Company has government orders or other agreements that extend beyond 15 years. The Company estimates environmental liabilities on a case-by-case basis using the most current status of available facts, existing technology, presently enacted laws and regulations and prior experience in remediation of contaminated sites. Recoveries of environmental costs from other parties are recorded as assets when their receipt is deemed probable.

An environmental reserve related to cleanup of a contaminated site might include, for example, a provision for one or more of the following types of costs: site investigation and testing costs, cleanup costs, costs related to soil and water contamination resulting from tank ruptures and post-remediation monitoring costs. These undiscounted reserves do not take into account any claims or recoveries from insurance. The measurement of environmental liabilities is based on the Company's periodic estimate of what it will cost to perform each of the elements of the remediation effort. The Company utilizes third parties to assist in the management and development of cost estimates for its sites. Changes to environmental regulations or other factors affecting environmental liabilities are reflected in the consolidated financial statements in the period in which they occur.

Pension and Other Postretirement Obligations

The Company recognizes a balance sheet asset or liability for each of its pension and other postretirement benefit plans equal to the plan's funded status as of a December 31 measurement date. The amounts recognized in the consolidated financial statements related to pension and other postretirement benefits are determined on an actuarial basis. Various assumptions are used in the calculation of the actuarial valuation of the employee benefit plans. These assumptions include the discount rate, compensation levels, expected long-term rates of return on plan assets and trends in health care costs. In addition, actuarial consultants use factors such as withdrawal and mortality rates to estimate the projected benefit obligation.

The Company applies the long-term expected rate of return to the fair value of plan assets and immediately recognizes in operating results the change in fair value of plan assets and net actuarial gains and losses annually in the fourth quarter of each fiscal year and whenever a plan is required to be remeasured. Events requiring a plan remeasurement will be recognized in the quarter in which such remeasurement event occurs. The remaining components of pension and other postretirement plan net periodic benefit costs are recorded on a quarterly basis.

The Company allocates the service cost and amortization of prior service cost (or credit) components of its pension and postretirement plans to its business segments. Interest cost, expected return on assets and net actuarial gains and losses are considered financing activities managed at the corporate level and are recorded to Other Activities. The Company believes the expense allocation appropriately matches the cost incurred for active employees to the respective business segment.

Other postretirement benefit plans provide medical and life insurance benefits to retirees who meet minimum age and service requirements. The key determinants of the accumulated postretirement benefit obligation ("APBO") are the discount rate and the health care cost trend rate.

• Discount Rate

As of the measurement date, the Company determines the appropriate discount rate used to calculate the present value of future cash flows currently expected to be required to settle the pension and other postretirement benefit obligations. The discount rate is generally based on the yield on high-quality corporate fixed-income securities.

In the US, the rate used to discount pension and other postretirement benefit plan liabilities is based on a yield curve developed from market data of over 300 Aa-grade non-callable bonds at the measurement date. This yield curve has discount rates that vary based on the duration of the obligations. The estimated future cash flows for the pension and other benefit obligations were matched to the corresponding rates on the yield curve to derive a weighted average discount rate.

The Company determines its discount rates in the Euro zone using the iBoxx Euro Corporate AA Bond indices with appropriate adjustments for the duration of the plan obligations. In other international locations, the Company determines its discount rates based on the yields of high quality government bonds with a duration appropriate to the duration of the plan obligations.

• Change in estimate regarding pension and other postretirement benefits

Beginning in 2016, the Company elected to change the method used to estimate the service and interest cost components of net periodic benefit cost for its significant defined benefit pension plans and other postretirement benefit plans. Previously, the Company estimated the service and interest cost components utilizing a single weighted average discount rate derived from the yield curve used to measure the benefit obligation at the beginning of the period. The Company elected to use a full yield curve approach in the estimation of these components of net periodic benefit cost by applying the specific spot rates along the yield curve used in the determination of the benefit obligation to the relevant projected cash flows. This change improves the correlation between projected benefit cash flows and the corresponding yield curve spot rates and provides a more precise measurement of service and interest costs. This change did not affect the measurement of the Company's total benefit obligations as the change in service and interest cost was completely offset in the annual actuarial (gain) loss reported. The Company accounted for this change prospectively as a change in estimate beginning in 2016.

• Expected Long-Term Rate of Return on Assets

The Company determines the long-term expected rate of return on plan assets by considering the current target asset allocation, as well as the historical and expected rates of return on various asset categories in which the plans are invested. A single long-term expected rate of return on plan assets is then calculated for each plan as the weighted average of the target asset allocation and the long-term expected rate of return assumptions for each asset category within each plan.

The expected rate of return is assessed annually and is based on long-term relationships among major asset classes and the level of incremental returns that can be earned by the successful implementation of different active investment management strategies. Equity returns are based on estimates of long-term inflation rate, real rate of return, 10-year Treasury bond premium over cash and historical equity risk premium. Fixed income returns are based on maturity, historical long-term inflation, real rate of return and credit spreads.

• Investment Policies and Strategies

The investment objectives for the Company's pension plans are to earn, over a moving twenty-year period, a long-term expected rate of return, net of investment fees and transaction costs, sufficient to satisfy the benefit obligations of the plan, while at the same time maintaining adequate liquidity to pay benefit obligations and proper expenses, and meet any other cash needs, in the short- to medium-term.

The equity and debt securities objectives are to provide diversified exposure across the US and global equity markets and to manage the risks and returns of the plans through the use of multiple managers and strategies. The fixed income strategy is designed to reduce liability-related interest rate risk by investing in bonds that match the duration and credit quality of the plan liabilities. Derivatives-based strategies may be used to mitigate investment risks.

The financial objectives of the qualified pension plans are established in conjunction with a comprehensive review of each plan's liability structure. The Company's asset allocation policy is based on detailed asset/liability analysis. In developing investment policy and financial goals, consideration is given to each plan's demographics, the returns and risks associated with current and alternative investment strategies and the current and projected cash, expense and funding ratios of each plan. Investment policies must also comply with local statutory requirements as determined by each country. A formal asset/liability study of each plan is undertaken every three to five years or whenever there has been a material change in plan demographics, benefit structure or funding status and investment market. The Company has adopted a long-term investment horizon such that the risk and duration of investment losses are weighed against the long-term potential for appreciation of assets. Although there cannot be complete assurance that these objectives will be realized, it is believed that the likelihood for their realization is reasonably high, based upon the asset allocation chosen and the historical and expected performance of the asset classes utilized by the plans. The intent is for investments to be broadly diversified across asset classes, investment styles, market sectors, investment managers, developed and emerging markets and securities in order to moderate portfolio volatility and risk. Investments may be in separate accounts, commingled trusts, mutual funds and other pooled asset portfolios provided they all conform to fiduciary standards.

External investment managers are hired to manage pension assets. Investment consultants assist with the screening process for each new manager hired. Over the long-term, the investment portfolio is expected to earn returns that exceed a composite of market indices that are weighted to match each plan's target asset allocation. The portfolio return should also (over the long-term) meet or exceed the return used for actuarial calculations in order to meet the future needs of each plan.

Commitments and Contingencies

Due to the inherent subjectivity of assessments and unpredictability of outcomes of legal proceedings, the Company's litigation accruals and estimates of possible loss or range of possible loss ("Possible Loss") may not represent the ultimate loss to the Company from legal proceedings. For reasonably possible loss contingencies that may be material, the Company estimates its Possible Loss when determinable, considering that the Company could incur no loss in certain matters.

For some matters, the Company is unable, at this time, to estimate its Possible Loss that is reasonably possible of occurring. Generally, the less progress that has been made in the proceedings or the broader the range of potential results, the more difficult it is for the Company to estimate the Possible Loss that is reasonably possible the Company could incur. The Company may disclose certain information related to a plaintiff's claim against the Company alleged in the plaintiff's pleadings or otherwise publicly available. While information of this type may provide insight into the potential magnitude of a matter, it does not necessarily represent the Company's estimate of reasonably possible or probable loss. Some of the Company's exposure in legal matters may be offset by applicable insurance coverage. The Company does not consider the possible availability of insurance coverage in determining the amounts of any accruals or any estimates of Possible Loss. Thus, the Company's exposure and ultimate losses may be higher or lower, and possibly materially so, than the Company's litigation accruals and estimates of Possible Loss.

Income Taxes

The provision for income taxes is determined using the asset and liability approach of accounting for income taxes. Under this approach, deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes and net operating loss and tax credit carryforwards. The amount of deferred taxes on these temporary differences is determined using the tax rates that are expected to apply to the period when the asset is realized or the liability is settled, as applicable, based on tax rates and laws in the respective tax jurisdiction enacted as of the balance sheet date.

The Company reviews its deferred tax assets for recoverability and establishes a valuation allowance based on historical taxable income, projected future taxable income, applicable tax strategies and the expected timing of the reversals of existing temporary differences. A valuation allowance is provided when it is more likely than not (likelihood of greater than 50%) that some portion or all of the deferred tax assets will not be realized.

The Company considers many factors when evaluating and estimating its tax positions and tax benefits, which may require periodic adjustments and which may not accurately anticipate actual outcomes. Tax positions are recognized only when it is more likely than not (likelihood of greater than 50%), based on technical merits, that the positions will be sustained upon examination. Tax positions that meet the more-likely-than-not threshold are measured using a probability weighted approach as the largest amount of tax benefit that is greater than 50% likely of being realized upon settlement. Whether the more-likely-than-not recognition threshold is met for a tax position is a matter of judgment based on the individual facts and circumstances of that position evaluated in light of all available evidence.

The Company recognizes interest and penalties related to uncertain tax positions in Income tax (provision) benefit in the consolidated statements of operations.

Other Accounting Policies

Consolidation Principles

The consolidated financial statements have been prepared in accordance with US GAAP for all periods presented and include the accounts of the Company and its majority owned subsidiaries over which the Company exercises control. All intercompany accounts and transactions have been eliminated in consolidation.

Estimates and Assumptions

The preparation of consolidated financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of net sales, expenses and allocated charges during the reporting period. Significant estimates pertain to impairments of goodwill, intangible assets and other long-lived assets, purchase price allocations, restructuring costs and other (charges) gains, net, income taxes, pension and other postretirement benefits, asset retirement obligations, environmental liabilities and loss contingencies, among others. Actual results could differ from those estimates.

Purchase Accounting

The Company recognizes the identifiable tangible and intangible assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date. The excess of purchase price over the aggregate fair values is recorded as goodwill. Intangible assets are valued using the relief from royalty, multi-period excess earnings and discounted cash flow methodologies, which are considered Level 3 measurements. The relief from royalty method estimates the Company's theoretical royalty savings from ownership of the intangible asset. Key assumptions used in this method include discount rates, royalty rates, growth rates, sales projections and terminal value rates. Key assumptions used in the multi-period excess earnings method include discount rates, retention rates, growth rates, sales projections, expense projections and contributory asset charges. Key assumptions used in the discounted cash flow valuation model include discount rates, growth rates, tax rates, cash flow projections and terminal value rates. All of these methodologies require significant management judgment and, therefore, are susceptible to change. The Company calculates the fair value of the identifiable tangible and intangible assets acquired and liabilities assumed to allocate the purchase price at the acquisition date. The Company may use the assistance of third-party valuation consultants.

Fair Value Measurements

The Company determines fair value based on the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities required to be recorded at fair value, the Company considers assumptions that market participants would use when pricing the asset or liability. Market participant assumptions are categorized by a three-tiered fair value hierarchy which prioritizes the inputs used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurement) and the lowest priority to unobservable inputs (Level 3 measurement). This hierarchy requires entities to maximize the use of observable inputs and minimize the use of unobservable inputs. If a financial instrument uses inputs that fall in different levels of the hierarchy, the instrument will be categorized based upon the lowest level of input that is significant to the fair value calculation. Valuations for fund investments, such as common/collective trusts, registered investment companies and short-term investment funds, which do not have readily determinable fair values, are typically estimated using a net asset value provided by a third party as a practical expedient.

The levels of inputs used to measure fair value are as follows:

Level 1 - unadjusted quoted prices for identical assets or liabilities in active markets accessible by the Company

Level 2 - inputs that are observable in the marketplace other than those inputs classified as Level 1

Level 3 - inputs that are unobservable in the marketplace and significant to the valuation

Cash and Cash Equivalents

All highly liquid investments with original maturities of three months or less are considered cash equivalents.

Allowance for Doubtful Accounts

The Company maintains allowances for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments. The Company believes, based on historical results, the likelihood of actual write-offs having a material impact on financial results is low. The allowance for doubtful accounts is estimated using factors such as customer credit ratings, past collection history and general risk profile. Receivables are charged against the allowance for doubtful accounts when it is probable that the receivable will not be recovered.

Inventories

Inventories, including stores and supplies, are stated at the lower of cost and net realizable value. Cost for inventories is determined using the first-in, first-out ("FIFO") method. Cost includes raw materials, direct labor and manufacturing overhead. Cost for stores and supplies is primarily determined by the average cost method.

Investments

• Marketable Securities

The cost of available-for-sale securities sold is determined using the specific identification method.

• Investments in Affiliates

Investments where the Company can exercise significant influence over operating and financial policies of an investee, which is generally considered when an investor owns 20% or more of the voting stock of an investee, are accounted for under the equity method of accounting. Investments where the Company does not exercise significant influence are accounted for under the cost method of accounting. The Company determined it cannot exercise significant influence over certain investments where the Company owns greater than a 20% interest due to local government investment in and influence over these entities, limitations on the Company's involvement in the day-to-day operations and the present inability of the entities to provide timely financial information prepared in accordance with US GAAP. Accordingly, these investments are accounted for under the cost method of accounting.

In certain instances, the financial information of the Company's equity investees is not available on a timely basis. Accordingly, the Company records its proportional share of the investee's earnings or losses on a consistent lag of no more than one quarter.

When required to assess the recoverability of its investments in affiliates, the Company estimates fair value using a discounted cash flow model. The Company may engage third-party valuation consultants to assist with this process.

Property, Plant and Equipment, Net

Land is recorded at historical cost. Buildings, machinery and equipment, including capitalized interest, and property under capital lease agreements, are recorded at cost less accumulated depreciation. The Company records depreciation and amortization in its consolidated statements of operations as either Cost of sales, Selling, general and administrative expenses or Research and development expenses consistent with the utilization of the underlying assets. Depreciation is calculated on a straight-line basis over the following estimated useful lives of depreciable assets:

Land improvements	20 years
Buildings and improvements	30 years
Machinery and equipment	20 years

Leasehold improvements are amortized over 10 years or the remaining life of the respective lease, whichever is shorter.

Accelerated depreciation is recorded when the estimated useful life is shortened. Ordinary repair and maintenance costs, including costs for planned maintenance turnarounds, that do not extend the useful life of the asset are charged to earnings as incurred. Fully depreciated assets are retained in property and depreciation accounts until sold or otherwise disposed. In the case of disposals, assets and related depreciation are removed from the accounts, and the net amounts, less proceeds from disposal, are included in earnings.

The Company assesses the recoverability of the carrying amount of its property, plant and equipment whenever events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be recoverable. An impairment loss would be assessed when estimated undiscounted future cash flows from the operation and disposition of the asset group are less than the carrying amount of the asset group. Asset groups have identifiable cash flows and are largely independent of other asset groups. Measurement of an impairment loss is based on the excess of the carrying amount of the asset group over its fair value. The Company calculates the fair value using a discounted cash flow model incorporating discount rates commensurate with the risks involved for the asset group, which is classified as a Level 3 fair value measurement. The key assumptions used in the discounted cash flow valuation model include discount rates, growth rates, tax rates, cash flow projections and terminal value rates. Discount rates, growth rates and cash flow projections involve significant judgment and are based on management's estimate of current and forecasted market conditions and cost structure. Impairment losses are generally recorded in Other (charges) gains, net in the consolidated statements of operations.

Definite-lived Intangible Assets

Customer-related intangible assets and other intangible assets with finite lives are amortized on a straight-line basis over their estimated useful lives, which range from three to 30 years.

Derivative and Hedging Instruments

The Company manages its exposures to interest rates, foreign exchange rates and commodity prices through a risk management program that includes the use of derivative financial instruments. The Company does not use derivative financial instruments for speculative trading purposes. The fair value of derivative instruments other than foreign currency forwards and swaps is recorded as an asset or liability on a net basis at the balance sheet date.

• Foreign Exchange Risk Management

Certain subsidiaries of the Company have assets and liabilities denominated in currencies other than their respective functional currencies, which creates foreign exchange risk. The Company also is exposed to foreign currency fluctuations on transactions with third-party entities as well as intercompany transactions. The Company minimizes its exposure to foreign currency fluctuations by entering into foreign currency forwards and swaps. These foreign currency forwards and swaps are not designated as hedges. Gains and losses on foreign currency forwards and swaps entered into to offset foreign exchange impacts on intercompany balances are included in Other income (expense), net in the consolidated statements of operations. Gains and losses on foreign currency forwards and swaps entered into to offset foreign exchange impacts on all other assets and liabilities are included in Foreign exchange gain (loss), net in the consolidated statements of operations.

The Company uses non-derivative financial instruments that may give rise to foreign currency transaction gains or losses to hedge the foreign currency exposure of net investments in foreign operations. Accordingly, the effective portion of gains and losses from remeasurement of the non-derivative financial instrument is included in foreign currency translation within Accumulated other comprehensive income (loss), net in the consolidated balance sheets. Gains and losses are reclassified to earnings in the period the hedged investment is sold or liquidated.

• Commodity Risk Management

The Company has exposure to the prices of commodities in its procurement of certain raw materials. The Company manages its exposure to commodity risk primarily through the use of long-term supply agreements, multi-year purchasing and sales agreements and forward purchase contracts. The Company regularly assesses its practice of using forward purchase contracts and other raw material hedging instruments in accordance with changes in economic conditions. Forward purchases and swap contracts for raw materials are principally settled through physical delivery of the commodity. For qualifying contracts, the Company has elected to apply the normal purchases and normal sales exception based on the probability at the inception and throughout the term of the contract that the Company would not net settle and the transaction would result in the physical delivery of the commodity. Accordingly, realized gains and losses on these contracts are included in the cost of the commodity upon the settlement of the contract.

The Company also uses commodity swaps to hedge the risk of fluctuating price changes in certain raw materials and in which physical settlement does not occur. These commodity swaps fix the variable fee component of the price of certain commodities. All or a portion of these commodity swap agreements may be designated as cash flow hedges. Accordingly, to the extent the cash flow hedge was effective, changes in the fair value of commodity swaps are included in gain (loss) from cash flow hedges within Accumulated other comprehensive income (loss), net in the consolidated balance sheets. Gains and losses are reclassified to earnings in the period that the hedged item affected earnings.

Insurance Loss Reserves

The Company has two wholly-owned insurance companies (the "Captives") that are used as a form of self-insurance for liability and workers compensation risks. Capitalization of the Captives is determined by regulatory guidelines. Premiums written are recognized as revenue based on policy periods. One of the Captives also insures certain third-party risks. The Captives use reinsurance arrangements to reduce their risks, however these arrangements do not relieve the Captives from their obligations to policyholders. The financial condition of the Captives' reinsurers are monitored to minimize exposure to insolvencies. However, failure of the reinsurers to honor their obligations could result in losses to the Captives.

Claim reserves are established when sufficient information is available to indicate a specific policy is involved and the Company can reasonably estimate its liability. These reserves are based on management estimates and periodic actuarial valuations. In addition, reserves have been established to cover exposures for both known and unreported claims. Estimates of these liabilities are reviewed and updated regularly, however it is possible that actual results could differ significantly from the recorded liabilities.

Asset Retirement Obligations

Periodically, the Company will conclude a site no longer has an indeterminate life based on long-lived asset impairment triggering events and decisions made by the Company. Accordingly, the Company will record asset retirement obligations associated with such sites. To measure the fair value of the asset retirement obligations, the Company will use the expected present value technique, which is classified as a Level 3 fair value measurement. The expected present value technique uses a set of cash flows that represent the probability-weighted average of all possible cash flows based on the Company's judgment. The Company uses the following inputs to determine the fair value of the asset retirement obligations based on the Company's experience with fulfilling obligations of this type and the Company's knowledge of market conditions: (a) labor costs; (b) allocation of overhead costs; (c) profit on labor and overhead costs; (d) effect of inflation on estimated costs and profits; (e) risk premium for bearing the uncertainty inherent in cash flows, other than inflation; (f) time value of money represented by the risk-free interest rate commensurate with the timing of the associated cash flows; and (g) nonperformance risk relating to the liability, which includes the Company's own credit risk. The asset retirement obligations are accreted to their undiscounted values until the time at which they are expected to be settled.

The Company has identified but not recognized asset retirement obligations related to certain of its existing operating facilities. Examples of these types of obligations include demolition, decommissioning, disposal and restoration activities. Legal obligations exist in connection with the retirement of these assets upon closure of the facilities or abandonment of the existing operations. However, the Company currently plans on continuing operations at these facilities indefinitely and therefore, a reasonable estimate of fair value cannot be determined at this time. In the event the Company considers plans to abandon or cease operations at these sites, an asset retirement obligation will be reassessed at that time. If certain operating facilities were to close, the related asset retirement obligations could significantly affect the Company's results of operations and cash flows.

Deferred Financing Costs

Deferred financing costs are amortized using a method that approximates the effective interest rate method over the term of the related debt into Interest expense in the consolidated statements of operations. Upon the extinguishment of the related debt, any unamortized deferred financing costs are immediately expensed and included in Refinancing expense in the consolidated statements of operations. Upon the modification of the related debt, a portion of unamortized deferred financing costs may be immediately expensed and included in Refinancing expense in the consolidated statements of operations. Direct costs of refinancing activities are immediately expensed and included in Refinancing expense in the consolidated statements of operations.

Revenue Recognition

The Company recognizes revenue when title and risk of loss have been transferred to the customer, generally at the time of shipment of products, and provided that four basic criteria are met: (a) persuasive evidence of an arrangement exists; (b) delivery has occurred or services have been rendered; (c) the fee is fixed or determinable; and (d) collectibility is reasonably assured. Shipping and handling fees billed to customers in a sales transaction are recorded in Net sales and shipping and handling costs incurred are recorded in Cost of sales.

Research and Development

The costs of research and development are charged as an expense in the period in which they are incurred.

Management Compensation Plans

Share-based compensation expense is measured at the grant date, based on the fair value of the award, and is recognized over the participant's requisite service period. Upon termination of a participant's employment with the Company by reason of death or disability, retirement or by the Company without cause (as defined in the respective award agreements), a prorated award will generally vest on the original vesting date. The prorated award is calculated based on the time lapsed between the grant date and the date of termination, reduced by awards previously vested. Upon the termination of a Participant's employment with the Company for any other reason, any unvested portion of the award shall be forfeited and canceled without consideration.

• Restricted Stock Units ("RSUs")

Performance-based RSUs. The Company generally grants performance-based RSUs to the Company's executive officers and certain employees annually in February. The Company may also grant performance-based RSUs to certain new employees or to employees who assume positions of increasing responsibility at the time those events occur. The fair value of the Company's performance-based RSUs with a performance condition is equal to the average of the high and low price of the Company's Series A common stock, par value $0.0001 per share ("Common Stock"), on the grant date less the present value of the expected dividends not received during the vesting period. Outstanding performance-based RSUs granted prior to 2016 generally vest in two equal tranches with the final tranche vesting three years from the grant date. Outstanding performance-based RSUs granted in 2016 and thereafter generally cliff-vest three years from the date of grant. Compensation expense for performance-based RSUs granted prior to 2016 is recognized over the vesting period of the respective grant based on the accelerated attribution method, and compensation expense for performance-based RSUs granted in 2016 and thereafter is recognized over the vesting period of the respective grant on a straight-line basis. Historically, the Company recognized share-based compensation net of estimated forfeitures over the vesting period of the respective grant. Effective January 1, 2017, the Company elected to change its accounting policy to recognize forfeitures as they occur. The new forfeiture policy election was adopted using a modified retrospective approach with a cumulative effect adjustment of $1 million to Retained earnings as of January 1, 2017. See Note 3 for further information.

The number of performance-based RSUs that ultimately vest is dependent on one or both of the following according to the terms of the specific award agreement: the achievement of (a) internal profitability targets (performance condition) and (b) market performance targets measured by the comparison of the Company's stock performance versus a defined peer group (market condition). Based on the achievement of internal profitability targets, the ultimate number of shares of the Company's Common Stock issued will range from zero to stretch, with stretch defined individually under each award, net of shares used to cover minimum statutory personal income taxes withheld. Performance-based RSUs are canceled to the extent actual results do not meet minimum internal profitability measures, as defined individually under each award.

Time-based RSUs. The Company grants non-employee Directors time-based RSUs annually that generally vest one year from the grant date. The Company also grants time-based RSUs to the Company's executives and certain employees that generally vest ratably over three years. The fair value of the time-based RSUs is equal to the average of the high and low price of the Company's Common Stock on the grant date less the present value of the expected dividends not received during the vesting period. Compensation expense for time-based RSUs less estimated forfeitures is recognized over the vesting period of the respective grant on a straight-line basis.

The Company's RSUs are net settled by withholding shares of the Company's Common Stock to cover minimum statutory income taxes and remitting the remaining shares of the Company's Common Stock to an individual brokerage account. Authorized shares of the Company's Common Stock are used to settle RSUs.

Under the 2009 Global Incentive Plan ("2009 GIP"), the Company may not grant RSUs with the right to participate in dividends or dividend equivalents.

Functional and Reporting Currencies

For the Company's international operations where the functional currency is other than the US dollar, assets and liabilities are translated using period-end exchange rates, while the statement of operations amounts are translated using the average exchange rates for the respective period. Differences arising from the translation of assets and liabilities in comparison with the translation of the previous periods or from initial recognition during the period are included as a separate component of Accumulated other comprehensive income (loss), net.

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Recent Accounting Pronouncements

12 Months Ended

Dec. 31, 2017

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

Recent Accounting Pronouncements

Recent Accounting Pronouncements

The following table provides a brief description of recent Accounting Standard Updates ("ASU") issued by the Financial Accounting Standards Board ("FASB"):

Standard	Description	Effective Date	Effect on the Financial Statements or Other Significant Matters
In August 2017, the FASB issued ASU 2017-12, Targeted Improvements to Accounting for Hedging Activities.	The new guidance improves the financial reporting of hedging relationships to better portray the economic results of an entity's risk management activities in its financial statements through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results.	January 1, 2019. Early adoption is permitted.	The Company plans to early adopt the new guidance during the three months ended March 31, 2018, but does not expect adoption will have a material impact on the Company's financial statements and related disclosures.
In March 2017, the FASB issued ASU 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost.	The new guidance clarifies the presentation and classification of the components of net periodic benefit costs in the consolidated statement of operations.	January 1, 2018. Early adoption is permitted.	The adoption of the new guidance will result in the reclassification of ($44) million, $41 million and $59 million of non-operating pension cost (credit) into non-operating pension cost (credit) below Operating profit, primarily impacting the Other Activities segment, for the years ended December 31, 2017, 2016 and 2015, respectively. The reclassification will not impact Earnings from continuing operations before taxes. Further, the adoption will not have a material impact on the Company's financial statement disclosures.
In January 2017, the FASB issued ASU 2017-04, Intangibles: Goodwill and Other: Simplifying the Test for Goodwill Impairment.	The new guidance simplifies subsequent measurement of goodwill by eliminating Step 2 from the goodwill impairment test.	January 1, 2020. Early adoption is permitted.	The Company adopted the new guidance during the three months ended September 30, 2017, as part of the FASB's simplification initiative. The adoption of the new guidance did not have a material impact to the Company.
In October 2016, the FASB issued ASU 2016-16, Intra-Entity Transfers of Assets Other Than Inventory.	The new guidance requires the income tax consequences of an intra-entity transfer of assets other than inventory to be recognized when the transfer occurs rather than deferring until an outside sale has occurred.	January 1, 2018. Early adoption is permitted.	The adoption of the new guidance will not have a material impact on the Company's financial statements and related disclosures.
In August 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments.	The new guidance clarifies the presentation and classification of certain cash receipts and cash payments in the statement of cash flows.	January 1, 2018. Early adoption is permitted.	The adoption of the new guidance will not have a material impact on the Company's financial statements and related disclosures.
In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting.	The new guidance simplifies several aspects of the accounting for share-based payment transactions, including the timing of recognizing income tax consequences, classification of awards as either equity or liabilities, calculation of compensation expense and classification on the statement of cash flows.	January 1, 2017. Early adoption is permitted.	The Company adopted the new guidance effective January 1, 2017, as part of the FASB's simplification initiative. The adoption of the new guidance did not have a material impact to the Company. The Company changed its accounting policy regarding the recognition of stock-based compensation expense as part of the adoption (Note 2).

Standard	Description	Effective Date	Effect on the Financial Statements or Other Significant Matters
In February 2016, the FASB issued ASU 2016-02, Leases.	The new guidance supersedes the lease guidance under FASB Accounting Standards Codification ("ASC") Topic 840, Leases, resulting in the creation of FASB ASC Topic 842, Leases. The guidance requires a lessee to recognize in the statement of financial position a liability to make lease payments and a right-of-use asset representing its right to use the underlying asset for the lease term for both finance and operating leases.	January 1, 2019. Early adoption is permitted.	The Company is currently evaluating its population of leases, and is continuing to assess all potential impacts of the standard, but currently believes the most significant impact relates to its accounting for manufacturing and logistics equipment, and real estate operating leases. The Company anticipates recognition of additional assets and corresponding liabilities related to leases upon adoption, but cannot quantify these at this time. The Company plans to adopt the standard effective January 1, 2019.
In January 2016, the FASB issued ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities.	The new guidance updates certain aspects of recognition, measurement, presentation and disclosure of financial instruments.	January 1, 2018. Early adoption is permitted.	The Company plans to adopt the guidance effective January 1, 2018, and will apply the modified retrospective approach with a cumulative-effect adjustment of less than $1 million to Retained earnings.
In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers.Since that date, the FASB has issued additional ASUs clarifying certain aspects of ASU 2014-09.	The new guidance requires entities to recognize revenue in a way that depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The new guidance provides alternative methods of adoption. Subsequent guidance issued after May 2014 did not change the core principle of ASU 2014-09.	January 1, 2018. Earlier adoption was permitted, but not before December 15, 2016.	The Company will adopt the revenue guidance effective January 1, 2018, using the modified retrospective approach. The Company has completed its assessment, and the impact from adoption is less than $1 million to the consolidated financial statements and related disclosures. Further, the Company does not expect a significant change to the manner or timing of recognizing revenue as a majority of its revenue transactions are recognized when product is delivered.

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Acquisitions, Dispositions and Plant Closures

12 Months Ended

Dec. 31, 2017

Acquisitions, Dispositions and Plant Closures [Abstract]

Acquisitions, Dispositions and Plant Closures [Text Block]

Acquisitions, Dispositions and Plant Closures

Acquisitions

• Acetate Tow Joint Venture

On June 18, 2017, Celanese, through various subsidiaries, entered into an agreement with affiliates of The Blackstone Group L.P. (the "Blackstone Entities") to form a joint venture which combines substantially all of the operations of the Company's cellulose derivatives business and the operations of the Rhodia Acetow cellulose acetate business formerly operated by Solvay S.A. and acquired by the Blackstone Entities on June 1, 2017. The Company's cellulose derivatives operations are included in the Consumer Specialties segment. The combined business will operate under a common governance structure through two separate joint ventures, each of which will be owned ultimately 70% and 30% by Celanese and the Blackstone Entities, respectively. One venture will primarily be comprised of the US operations being contributed and the other will be comprised of the remaining international operations being contributed. Closing of the transaction is subject to customary closing conditions, including: (i) waiting periods, clearances and/or approvals of the European Union and other jurisdictions requiring antitrust or similar approvals, and (ii) completion of the internal reorganization of the Company's cellulose derivatives business to facilitate the closing and operation of the joint venture post-closing. The agreement may be terminated by Celanese and/or the Blackstone Entities under certain limited circumstances, including if the closing is not consummated within one year of signing, which date may be extended by an additional 90 days, under certain circumstances. Pursuant to the terms of the agreement, once approved and upon closing, the Company is expecting to consolidate the joint venture results, subject to the Blackstone Entities' noncontrolling interest. The Company has received regulatory approval in four out of six jurisdictions requiring approval, and the European Commission ("EC") has moved into its Phase II investigation of the ongoing merger review process. Under the standard review process of a Phase II investigation, the Company received a statement of objections from the EC. This statement of objections sets out the provisional position of the EC and does not prejudge the final outcome of the case.

In connection with the agreement, the joint venture obtained commitments for credit facilities aggregating $2.4 billion to be entered into by the joint venture entities at the closing consisting of (i) senior secured ($135 million) and senior unsecured ($65 million) revolving credit facilities in an aggregate principal amount of $200 million, (ii) senior secured term loan facilities in an aggregate principal amount of $1.0 billion, (iii) a senior unsecured bridge facility in an aggregate principal amount of $800 million, which bridge facility will backstop the proposed issuance of $800 million senior unsecured notes by a joint venture subsidiary, and (iv) a senior unsecured term loan facility in an aggregate principal amount of $400 million. The credit facilities will be guaranteed by certain of the subsidiaries of the respective borrowers; however, only the $65 million senior unsecured revolving credit facility and the $400 million senior unsecured term loan credit facility will be guaranteed by Celanese. Approximately $2.2 billion of the proceeds of the debt financing are expected to be used, in part, to repay certain of the parties' existing indebtedness and a $1.6 billion dividend to the Company.

• Nilit Plastics

On May 3, 2017, using cash on hand and borrowings under the Company's senior unsecured revolving credit facility, the Company acquired the nylon compounding division of Nilit Group ("Nilit"), an independent producer of high performance nylon resins, fibers and compounds. Celanese acquired the nylon compounding product portfolio, customer agreements and manufacturing, technology and commercial facilities. The acquisition of Nilit increases the Company's global engineered materials product platforms, extends the operational model, technical and industry solutions capabilities and expands project pipelines. The acquisition was accounted for as a business combination and the acquired operations are included in the Advanced Engineered Materials segment.

Pro forma financial information since the respective acquisition date has not been provided as the acquisition did not have a material impact on the Company's financial information. The Company allocated the purchase price of the acquisition to identifiable assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date. The excess of the purchase price over the aggregate fair values was recorded as goodwill. The Company calculated the fair value of the assets acquired using the income, market, or cost approach (or a combination thereof). Fair values were determined based on Level 3 inputsincluding estimated future cash flows, discount rates, royalty rates, growth rates, sales projections, retention rates and terminal values, all of which require significant management judgment and are susceptible to change. The purchase price allocation is based upon preliminary information and is subject to change if additional information about the facts and circumstances that existed at the acquisition date becomes available. The final fair value of the net assets acquired may result in adjustments to the assets and liabilities, including goodwill. During the year endedDecember 31, 2017, the Company made certain adjustments to its purchase price allocation to adjust taxes and working capital, which resulted in a $2 million reduction to goodwill initially recorded. Any subsequent measurement period adjustments are not expected to have a material impact on the Company's results of operations.

The preliminary purchase price allocation for the Nilit acquisition is as follows:

	As of May 3, 2017
	(In $ millions)
Cash and cash equivalents	4
Trade receivables - third party and affiliates	21
Inventories	37
Property, plant and equipment, net	36
Intangible assets (Note 11)	104
Goodwill (Note 11)(1)	136
Other assets	11
Total fair value of assets acquired	349
Trade payables - third party and affiliates	(8	)
Total debt (Note 14)	(12	)
Deferred income taxes	(26	)
Benefit obligations	(15	)
Other liabilities(2)	(45	)
Total fair value of liabilities assumed	(106	)
Net assets acquired	243

______________________________

⁽¹⁾  Goodwill consists of expected revenue and operating synergies resulting from the acquisition. None of the goodwill is deductible for income tax purposes.

⁽²⁾  Includes a $29 million acquisition payment to Nilit Group after the date of close, which was paid as of June 30, 2017.

During the year endedDecember 31, 2017, transaction related costs of $3 million were expensed as incurred to Selling, general and administrative expenses in the consolidated statements of operations. The amount of pro forma Net earnings (loss) of Nilit included in the Company's consolidated statement of operations was less than 1% (unaudited) of its consolidated Net earnings (loss) had the acquisition occurred as of the beginning of 2017. The amount of Nilit Net earnings (loss) consolidated by the Company since the acquisition date was not material.

• SO.F.TER. S.r.l.

In December 2016, the Company acquired 100% of the stock of the Forli, Italy based SO.F.TER. S.r.l. ("SOFTER"), a leading thermoplastic compounder. The acquisition of SOFTER increases the Company's global engineered materials product platforms, extends the operational model, technical and industry solutions capabilities and expands project pipelines. The acquisition was accounted for as a business combination and the acquired operations are included in the Advanced Engineered Materials segment. The Company allocated the purchase price of the acquisition to identifiable assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date. The purchase price allocation was based on preliminary information. During the year endedDecember 31, 2017, the Company made certain adjustments to its purchase price allocation to adjust property, plant and equipment, inventory, accounts receivable and taxes, which resulted in a $6 million reduction to goodwill initially recorded.

Plant Closures

• Lanaken, Belgium

In December 2015, the Company announced it had ceased 50% of its manufacturing operations at its acetate tow facility in Lanaken, Belgium. The exit costs related to the capacity reduction at its Lanaken facility are included in Other (charges) gains, net in the consolidated statements of operations (Note 18). The Lanaken, Belgium operations are included in the Company's Consumer Specialties segment.

• Tarragona, Spain

In December 2015, the Company announced the sale of its conventional emulsions production facility. The Company was unable to find a credible buyer for the vinyl acetate ethylene ("VAE") emulsions facility, resulting in its closure. The Company completed the information and consultation process with employee representatives pursuant to which the Company ceased all manufacturing operations at the VAE emulsions facility. The exit costs, including long-lived asset impairment losses, related to the closure of the Tarragona VAE facility and the sale of the conventional facility are included in Other (charges) gains, net in the consolidated statements of operations (Note 18). The Tarragona, Spain operations are included in the Company's Industrial Specialties segment.

• Meredosia, Illinois

In December 2015, the Company ceased operation of its VAE emulsions facility in Meredosia, Illinois. The exit costs, including long-lived asset impairment losses, related to the closure of the VAE facility are included in Other (charges) gains, net in the consolidated statements of operations (Note 18). The Meredosia, Illinois operations are included in the Company's Industrial Specialties segment.

During the year ended December 31, 2015, the Company also recorded $39 million in accelerated depreciation expense related to property, plant and equipment no longer in use at the Company's ethanol technology development unit in Clear Lake, Texas. The accelerated depreciation is included in Research and development expenses in the consolidated statements of operations and is included in the Company's Acetyl Intermediates segment.

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Ventures and Variable Interest Entities

12 Months Ended

Dec. 31, 2017

Ventures and Variable Interest Entities [Abstract]

Ventures and Variable Interest Entities

Ventures and Variable Interest Entities

Consolidated Variable Interest Entities

The Company has a joint venture, Fairway Methanol LLC ("Fairway"), with Mitsui & Co., Ltd., of Tokyo, Japan ("Mitsui"), in which the Company owns 50% of Fairway, for the production of methanol at the Company's integrated chemical plant in Clear Lake, Texas. The methanol unit utilizes natural gas in the US Gulf Coast region as a feedstock and benefits from the existing infrastructure at the Company's Clear Lake facility. Both Mitsui and the Company supply their own natural gas to Fairway in exchange for methanol tolling under a cost-plus off-take arrangement.

The Company determined that Fairway is a variable interest entity ("VIE") in which the Company is the primary beneficiary. Under the terms of the joint venture agreements, the Company provides site services and day-to-day operations for the methanol facility. In addition, the joint venture agreements provide that the Company indemnifies Mitsui for environmental obligations that exceed a specified threshold, as well as an equity option between the partners. Accordingly, the Company consolidates the venture and records a noncontrolling interest for the share of the venture owned by Mitsui. Fairway is included in the Company's Acetyl Intermediates segment.

The carrying amount of the assets and liabilities associated with Fairway included in the consolidated balance sheets are as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Cash and cash equivalents	19	18
Trade receivables, net - third party & affiliates	9	8
Property, plant and equipment (net of accumulated depreciation - 2017: $90; 2016: $50)	697	734
Intangible assets (net of accumulated amortization - 2017: $2; 2016: $1)	25	26
Other assets	6	9
Total assets(1)	756	795
Trade payables	16	15
Other liabilities(2)	4	2
Total debt	5	5
Deferred income taxes	3	2
Total liabilities	28	24

______________________________

⁽¹⁾  Assets can only be used to settle the obligations of Fairway.

⁽²⁾  Primarily represents amounts owed by Fairway to the Company for reimbursement of expenditures.

Nonconsolidated Variable Interest Entities

The Company holds variable interests in entities that supply certain raw materials and services to the Company. The variable interests primarily relate to cost-plus contractual arrangements with the suppliers and recovery of capital expenditures for certain plant assets plus a rate of return on such assets. Liabilities for such supplier recoveries of capital expenditures have been recorded as capital lease obligations. The entities are not consolidated because the Company is not the primary beneficiary of the entities as it does not have the power to direct the activities of the entities that most significantly impact the entities' economic performance. The Company's maximum exposure to loss as a result of its involvement with these VIEs as of December 31, 2017 relates primarily to the recovery of capital expenditures for certain property, plant and equipment.

The carrying amount of the assets and liabilities associated with the obligations to nonconsolidated VIEs, as well as the maximum exposure to loss relating to these nonconsolidated VIEs are as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Property, plant and equipment, net	53	60
Trade payables	25	53
Current installments of long-term debt	18	10
Long-term debt	76	91
Total liabilities	119	154
Maximum exposure to loss	164	240

The difference between the total liabilities associated with obligations to unconsolidated VIEs and the maximum exposure to loss primarily represents take-or-pay obligations for services included in the Company's unconditional purchase obligations (Note 24).

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Marketable Securities, at Fair Value

12 Months Ended

Dec. 31, 2017

Investments, Debt and Equity Securities [Abstract]

Marketable Securities, at Fair Value

Marketable Securities, at Fair Value

The Company's nonqualified trusts hold available-for-sale securities for funding requirements of the Company's nonqualified pension plans (Note 15) as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Amortized cost	32	30
Gross unrealized gain	—	—
Gross unrealized loss	—	—
Fair value	32	30

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Receivables, Net

12 Months Ended

Dec. 31, 2017

Receivables [Abstract]

Receivables, Net

Receivables, Net

	As of December 31,
	2017		2016
	(In $ millions)
Trade receivables - third party and affiliates	995		807
Allowance for doubtful accounts - third party and affiliates	(9	)	(6	)
Trade receivables - third party and affiliates, net	986		801

	As of December 31,
	2017	2016
	(In $ millions)
Non-income taxes receivable	81	83
Reinsurance receivables	16	16
Income taxes receivable	64	43
Other	83	81
Non-trade receivables, net	244	223

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Inventories

12 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Inventories

Inventories

	As of December 31,
	2017	2016
	(In $ millions)
Finished goods	591	506
Work-in-process	57	45
Raw materials and supplies	252	169
Total	900	720

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Investments in Affiliates

12 Months Ended

Dec. 31, 2017

Investments in and Advances to Affiliates, Schedule of Investments [Abstract]

Investments in Affiliates

Investments in Affiliates

Entities in which the Company has an investment accounted for under the cost or equity method of accounting are considered affiliates; any transactions or balances with such companies are considered affiliate transactions.

Equity Method

Equity method investments and ownership interests by business segment are as follows:

	Ownership as of December 31,		Carrying Value as of December 31,		Share of Earnings (Loss) Year Ended December 31,				Dividends and Other Distributions Year Ended December 31,
	2017	2016	2017	2016	2017	2016	2015		2017		2016		2015
	(In percentages)		(In $ millions)
Advanced Engineered Materials
Ibn Sina	25	25	178	113	58	38	88		(1	)	(18	)	(98	)
InfraServ GmbH & Co. Hoechst KG(1)	32	—	139	—	19	—	—		(26	)	—		—
Fortron Industries LLC	50	50	111	100	17	9	11		(6	)	(9	)	(8	)
Korea Engineering Plastics Co., Ltd.	50	50	155	137	25	25	16		(25	)	(11	)	(10	)
Polyplastics Co., Ltd.	45	45	170	156	57	50	35		(64	)	(54	)	(20	)
Other Activities(2)
InfraServ GmbH & Co. Gendorf KG(3)	39	39	41	38	4	7	7		(5	)	(5	)	(5	)
InfraServ GmbH & Co. Hoechst KG(1)	—	32	—	132	—	22	21		—		(30	)	(32	)
InfraServ GmbH & Co. Knapsack KG(3)	27	27	20	18	2	4	4		(4	)	(4	)	(3	)
Consumer Specialties
Sherbrooke Capital Health and Wellness, L.P.(4)	10	10	3	3	1	—	(1	)	—		—		—
Total			817	697	183	155	181		(131	)	(131	)	(176	)

______________________________

⁽¹⁾  InfraServ GmbH & Co. Hoechst KG is owned primarily by an entity included in the Company's Advanced Engineered Materials segment. Prior to 2017, InfraServ GmbH & Co. Hoechst KG was owned primarily by an entity included in the Company's Other Activities segment. The Company's Consumer Specialties segment and Acetyl Intermediates segment also each hold an ownership percentage.

⁽²⁾  InfraServ real estate service companies ("InfraServ Entities") own and operate sites in Frankfurt am Main-Hoechst, Gendorf and Knapsack, Germany. The InfraServ Entities were created to own land and property and to provide various technical and administrative services at these manufacturing locations.

⁽³⁾  See Note 29 for further information.

⁽⁴⁾  The Company accounts for its ownership interest in Sherbrooke Capital Health and Wellness, L.P. under the equity method of accounting because the Company is able to exercise significant influence.

Cost Method

Cost method investments and ownership interests by business segment are as follows:

	Ownership as of December 31,		Carrying Value as of December 31,		Dividend Income for the Year Ended December 31,
	2017	2016	2017	2016	2017	2016	2015
	(In percentages)		(In $ millions)
Consumer Specialties
Kunming Cellulose Fibers Co. Ltd.	30	30	14	14	12	14	14
Nantong Cellulose Fibers Co. Ltd.	31	31	109	106	81	80	79
Zhuhai Cellulose Fibers Co. Ltd.	30	30	30	30	14	13	13
Other Activities
InfraServ GmbH & Co. Wiesbaden KG	8	8	5	5	1	1	1
Other			1	—	—	—	—
Total			159	155	108	108	107

Transactions with Affiliates

The Company owns manufacturing facilities at the InfraServ location in Frankfurt am Main-Hoechst, Germany and has contractual agreements with the InfraServ Entities and certain other equity affiliates and investees accounted for under the cost method. These contractual agreements primarily relate to energy purchases, site services and purchases of product for consumption and resale.

Transactions and balances with affiliates are as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Purchases	250	203	195
Sales	—	2	—

	As of December 31,
	2017	2016
	(In $ millions)
Non-trade receivables	21	26
Total due from affiliates	21	26
Short-term borrowings(1)	32	17
Trade payables	36	45
Current Other liabilities	8	8
Total due to affiliates	76	70

______________________________

⁽¹⁾  The Company has agreements with certain affiliates whereby excess affiliate cash is lent to and managed by the Company at variable interest rates governed by those agreements.

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Property, Plant and Equipment, Net

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment, Net [Abstract]

Property, Plant and Equipment, Net

Property, Plant and Equipment, Net

	As of December 31,
	2017		2016
	(In $ millions)
Land	47		38
Land improvements	72		70
Buildings and building improvements	758		695
Machinery and equipment	5,101		4,753
Construction in progress	368		260
Gross asset value	6,346		5,816
Accumulated depreciation	(2,584	)	(2,239	)
Net book value	3,762		3,577

Assets under capital leases, net, included in the amounts above are as follows:

	As of December 31,
	2017		2016
	(In $ millions)
Buildings	14		13
Machinery and equipment	296		291
Accumulated depreciation	(179	)	(149	)
Net book value	131		155

Capitalized interest costs and depreciation expense are as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Capitalized interest	6	5	15
Depreciation expense	285	281	346

During 2017 and 2016, certain long-lived assets were impaired (Note 18). No long-lived assets were impaired during 2015.

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Goodwill and Intangible Assets, Net

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets, Net

Goodwill and Intangible Assets, Net

Goodwill

	Advanced Engineered Materials		Consumer Specialties		Industrial Specialties		Acetyl Intermediates		Total
	(In $ millions)
As of December 31, 2015	282		230		39		154		705
Acquisitions (Note 4)	106		—		—		—		106
Exchange rate changes	(3	)	(5	)	(1	)	(6	)	(15	)
As of December 31, 2016	385		225		38		148		796
Acquisitions (Note 4)	128		—		—		—		128
Exchange rate changes	42		12		2		23		79
As of December 31, 2017(1)	555		237		40		171		1,003

______________________________

⁽¹⁾  There were $0 million of accumulated impairment losses as of December 31, 2017.

In connection with the Company's annual goodwill impairment assessment, the Company did not record an impairment loss to goodwill during the nine months ended September 30, 2017 as the estimated fair value for each of the Company's reporting units exceeded the carrying amount of the underlying assets by a substantial margin (Note 2). No events or changes in circumstances occurred during the three months ended December 31, 2017 that would indicate that the carrying amount of the assets may not be fully recoverable. Accordingly, no additional impairment analysis was performed during that period.

Intangible Assets, Net

Finite-lived intangible assets are as follows:

	Licenses		Customer- Related Intangible Assets		Developed Technology		Covenants Not to Compete and Other		Total
	(In $ millions)
Gross Asset Value
As of December 31, 2015	38		456		35		50		579
Acquisitions (Note 4)	—		64		—		3		67		(1)
Exchange rate changes	(2	)	(11	)	—		—		(13	)
As of December 31, 2016	36		509		35		53		633
Acquisitions (Note 4)	—		73		9		—		82		(2)
Exchange rate changes	2		58		1		1		62
As of December 31, 2017	38		640		45		54		777
Accumulated Amortization
As of December 31, 2015	(25	)	(449	)	(25	)	(29	)	(528	)
Amortization	(3	)	(2	)	(2	)	(2	)	(9	)
Exchange rate changes	1		11		1		—		13
As of December 31, 2016	(27	)	(440	)	(26	)	(31	)	(524	)
Amortization	(4	)	(11	)	(3	)	(2	)	(20	)
Exchange rate changes	(2	)	(45	)	(1	)	1		(47	)
As of December 31, 2017	(33	)	(496	)	(30	)	(32	)	(591	)
Net book value	5		144		15		22		186

______________________________

⁽¹⁾  Primarily related to intangible assets acquired from SOFTER (Note 4) during the year ended December 31, 2016, with a weighted average amortization period of 12 years.

⁽²⁾  Primarily related to intangible assets acquired from Nilit (Note 4) during the year ended December 31, 2017, with a weighted average amortization period of 14 years.

Indefinite-lived intangible assets are as follows:

	Trademarks and Trade Names
	(In $ millions)
As of December 31, 2015	74
Acquisitions (Note 4)	12
Exchange rate changes	(1	)
As of December 31, 2016	85
Acquisitions (Note 4)	22
Exchange rate changes	8
As of December 31, 2017	115

In connection with the Company's annual indefinite-lived intangible assets impairment assessment, the Company did not record an impairment loss to indefinite-lived intangible assets during the nine months ended September 30, 2017 as the estimated fair value for each of the Company's indefinite-lived intangible assets exceeded the carrying amount of the underlying asset by a substantial margin (Note 2). No events or changes in circumstances occurred during the three months ended December 31, 2017 that would indicate that the carrying amount of the assets may not be fully recoverable. Accordingly, no additional impairment analysis was performed during that period.

The Company's trademarks and trade names have an indefinite life. For the year ended December 31, 2017, the Company did not renew or extend any intangible assets.

Estimated amortization expense for the succeeding five fiscal years is as follows:

	(In $ millions)
2018	19
2019	17
2020	15
2021	15
2022	14

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Current Other Liabilities

12 Months Ended

Dec. 31, 2017

Other Liabilities, Current [Abstract]

Current Other Liabilities

Current Other Liabilities

	As of December 31,
	2017	2016
	(In $ millions)
Asset retirement obligations	19	9
Benefit obligations (Note 15)	30	31
Customer rebates	65	51
Derivatives (Note 22)	3	3
Environmental (Note 16)	14	14
Insurance	5	6
Interest	17	15
Restructuring (Note 18)	5	16
Salaries and benefits	113	97
Sales and use tax/foreign withholding tax payable	16	21
Other	67	59
Total	354	322

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Noncurrent Other Liabilities

12 Months Ended

Dec. 31, 2017

Other Liabilities, Noncurrent [Abstract]

Noncurrent Other Liabilities

Noncurrent Other Liabilities

	As of December 31,
	2017	2016
	(In $ millions)
Asset retirement obligations	7	20
Deferred proceeds	47	41
Deferred revenue	6	9
Environmental (Note 16)	59	50
Income taxes payable (Note 19)	197	6
Insurance	43	46
Other	54	43
Total	413	215

Changes in asset retirement obligations are as follows:

	Year Ended December 31,
	2017		2016		2015
	(In $ millions)
Balance at beginning of year	29		36		37
Additions(1)	—		2		—
Accretion	1		1		1
Payments	(5	)	(10	)	(4	)
Revisions to cash flow estimates(2)	1		—		2
Balance at end of year	26		29		36

______________________________

⁽¹⁾  Primarily relates to sites which management no longer considers to have an indeterminate life.

⁽²⁾  Primarily relates to revisions to the estimated cost and timing of future obligations.

Included in the asset retirement obligations for the years ended December 31, 2017 and 2016 is $10 million and $10 million, respectively, related to indemnifications received for a business acquired in 2005. The corresponding $10 million receivable is included in Non-trade receivables, net in the consolidated balance sheet as of December 31, 2017.

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Debt

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Debt

Debt

	As of December 31,
	2017	2016
	(In $ millions)
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates
Current installments of long-term debt	63	27
Short-term borrowings, including amounts due to affiliates(1)	86	68
Short-term SOFTER bank loans (Note 4)(2)	—	23
Revolving credit facility(3)	97	—
Accounts receivable securitization facility(4)	80	—
Total	326	118

______________________________

⁽¹⁾  The weighted average interest rate was 2.8% and 3.1% as of December 31, 2017 and 2016, respectively.

⁽²⁾  The weighted average interest rate was 1.2% as of December 31, 2016.

⁽³⁾  The weighted average interest rate was 4.1% as of December 31, 2017.

⁽⁴⁾  The weighted average interest rate was 2.1% as of December 31, 2017.

	As of December 31,
	2017		2016
	(In $ millions)
Long-Term Debt
Senior unsecured term loan due 2021(1)	494		500
Senior unsecured notes due 2019, interest rate of 3.250%	360		316
Senior unsecured notes due 2021, interest rate of 5.875%	400		400
Senior unsecured notes due 2022, interest rate of 4.625%	500		500
Senior unsecured notes due 2023, interest rate of 1.125%	897		788
Senior unsecured notes due 2025, interest rate of 1.250%	359		—
Pollution control and industrial revenue bonds due at various dates through 2030, interest rates ranging from 4.05% to 5.00%	169		170
SOFTER bank loans due at various dates through 2021(Note 4)(2)	—		47
Nilit bank loans due at various dates through 2026 (Note 4)(3)	11		—
Obligations under capital leases due at various dates through 2054	208		217
Subtotal	3,398		2,938
Unamortized debt issuance costs(4)	(20	)	(21	)
Current installments of long-term debt	(63	)	(27	)
Total	3,315		2,890

______________________________

⁽¹⁾  The margin for borrowings under the senior unsecured term loan due 2021 was 1.5% above LIBOR at current Celanese credit ratings.

⁽²⁾  The weighted average interest rate was 1.6% as of December 31, 2016.

⁽³⁾  The weighted average interest rate was 1.3% as of December 31, 2017.

⁽⁴⁾  Related to the Company's long-term debt, excluding obligations under capital leases.

Senior Credit Facilities

In July 2016, Celanese, Celanese US and certain subsidiaries entered into a new senior credit agreement (the "Credit Agreement") consisting of a $500 million senior unsecured term loan and a $1.0 billion senior unsecured revolving credit facility (with a letter of credit sublimit), each maturing in 2021. The Credit Agreement is guaranteed by Celanese, Celanese US and substantially all of its domestic subsidiaries ("the Subsidiary Guarantors").

The Company's debt balances and amounts available for borrowing under its senior unsecured revolving credit facility are as follows:

	As of December 31, 2017
	(In $ millions)
Revolving Credit Facility
Borrowings outstanding(1)	97
Letters of credit issued	—
Available for borrowing(2)	903

______________________________

⁽¹⁾  The Company borrowed $528 million and repaid $431 million under its senior unsecured revolving credit facility during the year ended December 31, 2017.

⁽²⁾  The margin for borrowings under the senior unsecured revolving credit facility were 1.5% above LIBOR at current Company credit ratings.

Senior Notes

The Company has outstanding senior unsecured notes, issued in public offerings registered under the Securities Act of 1933 ("Securities Act"), as amended (collectively, the "Senior Notes"). The Senior Notes were issued by Celanese US and are guaranteed on a senior unsecured basis by Celanese and the Subsidiary Guarantors. Celanese US may redeem some or all of each of the Senior Notes, prior to their respective maturity dates, at a redemption price of 100% of the principal amount, plus a "make-whole" premium as specified in the applicable indenture, plus accrued and unpaid interest, if any, to the redemption date.

On December 11, 2017, Celanese US completed an offering of €300 million in principal amount of 1.250% senior unsecured notes due February 11, 2025 (the "1.250% Notes") in a public offering registered under the Securities Act. The 1.250% Notes were issued under a base indenture dated May 6, 2011. The 1.250% Notes were issued at a discount to par at a price of 99.810%, which is being amortized to Interest expense in the consolidated statements of operations over the term of the 1.250% Notes. Commencing November 11, 2024 through the redemption date, February 11, 2025, Celanese US may redeem some or all of the 1.250% Notes at any time and from time to time at a redemption price of 100% of the principal amount, plus accrued and unpaid interest, if any, to the redemption date.

In September 2016, Celanese US completed an offering of €750 million in principal amount of 1.125% senior unsecured notes due September 26, 2023 (the "1.125% Notes") in a public offering registered under the Securities Act. The 1.125% Notes were issued under a base indenture dated May 6, 2011. The 1.125% Notes were issued at a discount to par at a price of 99.713%, which is being amortized to Interest expense in the consolidated statements of operations over the term of the 1.125% Notes. Net proceeds from the sale of the 1.125% Notes were used to repay $411 million of outstanding borrowings under the new senior unsecured revolving credit facility and for general corporate purposes. Commencing June 26, 2023 through the redemption date, September 26, 2023, Celanese US may redeem some or all of the 1.125% Notes at any time and from time to time at a redemption price of 100% of the principal amount, plus accrued and unpaid interest, if any, to the redemption date.

SOFTER Bank Loans

In January 2017, the Company repaid $69 million of the $70 million SOFTER bank loans outstanding at December 31, 2016 with cash on hand.

Accounts Receivable Securitization Facility

The Company has a US accounts receivable securitization facility involving receivables of certain of its domestic subsidiaries of the Company transferred to a wholly-owned, "bankruptcy remote" special purpose subsidiary of the Company ("SPE"). The securitization facility, which permits cash borrowings and letters of credit, expires in July 2019. All of the SPE's assets have been pledged to the administrative agent in support of the SPE's obligations under the facility.

The Company's debt balances and amounts available for borrowing under its securitization facility are as follows:

	As of December 31, 2017
	(In $ millions)
Accounts Receivable Securitization Facility
Borrowings outstanding(1)	80
Letters of credit issued	29
Available for borrowing	11
Total borrowing base	120
Maximum borrowing base(2)	120

______________________________

⁽¹⁾  The Company borrowed $85 million and repaid $5 million during the year ended December 31, 2017.

⁽²⁾  Outstanding accounts receivable transferred to the SPE was $158 million.

Principal payments scheduled to be made on the Company's debt, including short-term borrowings, are as follows:

	(In $ millions)
2018	326
2019	437
2020	80
2021	794
2022	526
Thereafter	1,498
Total	3,661

Net deferred financing costs are as follows:

	(In $ millions)
As of December 31, 2014	27
Financing costs deferred	—
Accelerated amortization due to refinancing activity	—
Amortization	(5	)
As of December 31, 2015(1)	22
Financing costs deferred(2)	13
Accelerated amortization due to refinancing activity(3)	(3	)
Amortization	(5	)
As of December 31, 2016(1)	27
Financing costs deferred(4)	1
Accelerated amortization due to refinancing activity	—
Amortization	(4	)
As of December 31, 2017(1)	24

____________________________

⁽¹⁾  Includes $4 million, $6 million and $4 million as of December 31,2017, 2016 and 2015, respectively, related to the Company's revolving credit facility and accounts receivables securitization facility, which are included in noncurrent Other assets in the consolidated balance sheets.

⁽²⁾  Includes $5 million, $6 million and $2 million related to the Credit Agreement, the 1.125% Notes and the pollution control and industrial revenue bonds, respectively, all of which are being amortized through the term of the respective financing arrangement.

⁽³⁾  Includes $2 million and $1 million related to the senior secured credit facilities and the pollution control and industrial revenue bonds, respectively, which are included in Refinancing expense in the consolidated statement of operations during the year ended December 31, 2016.

⁽⁴⁾  Related to the 1.250% Notes, which are being amortized through the term of the 1.250% Notes.

Covenants

The Company's material financing arrangements contain customary covenants, including the maintenance of certain financial ratios, events of default and change of control provisions. Failure to comply with these covenants, or the occurrence of any other event of default, could result in acceleration of the borrowings and other financial obligations. The Company is in compliance with all of the covenants related to its debt agreements as of December 31, 2017.

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Benefit Obligations

12 Months Ended

Dec. 31, 2017

Retirement Benefits [Abstract]

Benefit Obligations

Benefit Obligations

Pension Obligations 

The Company sponsors defined benefit pension plans in North America, Europe and Asia. Independent trusts or insurance companies administer the majority of these plans. Pension obligations are established for benefits payable in the form of retirement, disability and surviving dependent pensions. The commitments result from participation in defined contribution and defined benefit plans, primarily in the US. Benefits are dependent on years of service and the employee's compensation. Supplemental retirement benefits provided to certain employees are nonqualified for US tax purposes. Separate nonqualified trusts have been established for certain US nonqualified plan obligations. Pension costs under the Company's retirement plans are actuarially determined.

In October 2014, the Company offered a limited-time, voluntary program to certain participants of the Company's US qualified defined benefit pension plan with a vested benefit who terminated from the Company on or before May 31, 2014. The limited-time opportunity ended in November 2014 and included an offer of a single lump sum payment in December 2014 or to begin monthly annuity payments, regardless of age, or to continue to defer benefits until retirement age. If an election was not made by the eligible participant, the participant will begin receiving payments when otherwise eligible under the terms of the US qualified defined benefit pension plan.

Effective June 2014, the Company's US qualified defined benefit plan was amended and benefits offered to all current union participants of the Cash Balance Plan (hired on or after January 1, 2001) at the Company's Narrows, Virginia facility have been frozen and the US qualified defined benefit plan was closed to future union participants at the facility. Accumulated benefits earned and service rendered through May 2014 under the Plan provisions for the Cash Balance Plan Participants will continue to be considered for purposes of determining retirement benefits. Effective May 2014, the Company's US qualified defined benefit plan was amended and benefits offered to all current union participants of the Flat Rate Plan at the Company's Narrows, Virginia facility have been frozen and the US qualified defined benefit plan was closed to future union participants at the facility. Accumulated benefits earned and service rendered through December 2014 under the Plan provisions for the Flat Rate Plan Participants will continue to be considered for purposes of determining retirement benefits and eligibility for early retirement. These actions did not result in a curtailment gain or loss as the projected benefit obligation does not rely on salary assumptions.

Effective December 2013, benefits offered to all US non-union eligible employees in the Company's US qualified defined benefit pension plan have been frozen and the US qualified defined benefit pension plan was closed to new participants. Accumulated benefits earned and service rendered through December 31, 2013 under the US qualified defined benefit pension plan provisions will continue to be considered for purposes of determining retirement benefits and eligibility for early retirement.

The Company participates in a multiemployer defined benefit plan and a multiemployer defined contribution plan in Germany covering certain employees. The Company's contributions to the multiemployer defined benefit plan are based on specified percentages of employee contributions as outlined in a works council agreement, covering all German entity employees hired prior to January 1, 2012. As of January 1, 2012, the multiemployer defined benefit pension plan described above was closed to new employees. Qualifying employees hired in Germany after December 31, 2011 are covered by a multiemployer defined contribution plan. The Company's contributions to the multiemployer defined contribution plan are based on specified percentages of employee contributions, similar to the multiemployer defined benefit plan, but at a lower rate.

Statutory regulations and the works council agreement require the contributions to fully fund the multiemployer plans. The risks of participating in the multiemployer plans are different from single-employer plans in the following aspects:

• Assets contributed to the multiemployer plan by one employer may be used to provide benefits to employees of other participating employers.

• If a participating employer stops contributing to the plan, any underfunding may be borne by the remaining participants, especially since regulations strictly enforce funding requirements.

• If the Company chooses to stop participating in the multiemployer plan, the Company may be required to pay the plan an amount based on the underfunded status of the plan, referred to as the withdrawal liability.

Based on the 2017 unaudited and 2016 audited multiemployer defined benefit plan's financial statements, the plan is 100% funded in 2017, 2016 and 2015. The number of employees covered by the Company's multiemployer defined benefit plan remained relatively stable year over year from 2015 to 2017, resulting in minimal changes to employer contributions. Participation in the German multiemployer defined benefit plan is not considered individually significant to the Company.

Contributions made by the Company to the German multiemployer plan are as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Multiemployer defined benefit plan	7	7	6

Other Postretirement Obligations

Certain retired employees receive postretirement health care and life insurance benefits under plans sponsored by the Company, which has the right to modify or terminate these plans at any time. The cost for coverage is shared between the Company and the retiree. The cost of providing retiree health care and life insurance benefits is actuarially determined and accrued over the service period of the active employee group. The Company's policy is to fund benefits as claims and premiums are paid. The US postretirement health care plan was closed to new participants effective January 1, 2006.

Postemployment Obligations

The Company provides benefits to certain employees after employment but prior to retirement, including severance and disability-related benefits offered pursuant to ongoing benefit arrangements. The cost of providing postemployment benefits is actuarially determined and recorded when the obligation is probable of occurring and can be reasonably estimated.

Postemployment obligations are as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Postemployment benefits	8	9

Defined Contribution Plans

The Company sponsors various defined contribution plans in North America, Europe and Asia covering certain employees. Employees may contribute to these plans and the Company will match these contributions in varying amounts. The Company's matching contribution to the defined contribution plans are based on specified percentages of employee contributions.

Beginning in 2014, the Company took the following actions as it relates to the US defined contribution plan:

• Increased its employer match for those employees participating in the US defined contribution plan;

• Added an annual retirement contribution for US employees who are employed as of December 31st each year (or have died during that year), regardless of whether the employee contributes to the US defined contribution plan; and

• For certain eligible US employees, provides an incremental retirement contribution through 2017, based on years of service and specified percentages of eligible compensation.

The amount of costs recognized for the Company's defined contribution plans are as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Defined contribution plans	40	43	44

Summarized information on the Company's pension and postretirement benefit plans is as follows:

	Pension Benefits As of December 31,				Postretirement Benefits As of December 31,
	2017		2016		2017		2016
	(In $ millions)
Change in Projected Benefit Obligation
Projected benefit obligation as of beginning of period	3,610		3,635		67		66
Service cost	9		8		1		—
Interest cost	107		113		1		2
Participant contributions	—		—		—		—
Plan amendments	—		—		—		—
Net actuarial (gain) loss(1)	151		102		(2	)	3
Divestitures	—		—		—		—
Settlements	(1	)	(1	)	—		—
Benefits paid	(233	)	(232	)	(4	)	(4	)
Federal subsidy on Medicare Part D	—		—		—		—
Curtailments	—		—		—		—
Special termination benefits	1		3		—		—
Exchange rate changes	69		(18	)	3		—
Other(2)	15		—		—		—
Projected benefit obligation as of end of period	3,728		3,610		66		67
Change in Plan Assets
Fair value of plan assets as of beginning of period	2,784		2,508		—		—
Actual return on plan assets	302		177		—		—
Employer contributions	359		346		4		4
Participant contributions	—		—		—		—
Settlements	(1	)	(1	)	—		—
Benefits paid(3)	(233	)	(232	)	(4	)	(4	)
Exchange rate changes	40		(14	)	—		—
Fair value of plan assets as of end of period	3,251		2,784		—		—
Funded status as of end of period	(477	)	(826	)	(66	)	(67	)
Amounts Recognized in the Consolidated Balance Sheets Consist of:
Noncurrent Other assets	64		22		—		—
Current Other liabilities	(24	)	(25	)	(5	)	(5	)
Benefit obligations	(517	)	(823	)	(61	)	(62	)
Net amount recognized	(477	)	(826	)	(66	)	(67	)
Amounts Recognized in Accumulated Other Comprehensive Income Consist of:
Net actuarial (gain) loss(4)	9		18		—		—
Prior service (benefit) cost	(1	)	(1	)	1		(1	)
Net amount recognized(5)	8		17		1		(1	)

______________________________

⁽¹⁾  Primarily relates to change in discount rates.

⁽²⁾  Primarily relates to the acquisition of Nilit (Note 4).

⁽³⁾  Includes benefit payments to nonqualified pension plans of $22 million and $22 million as of December 31, 2017 and 2016, respectively.

⁽⁴⁾  Relates to the pension plans of the Company's equity method investments.

⁽⁵⁾  Amount shown net of an income tax benefit of $6 million and $4 million as of December 31, 2017 and 2016, respectively, in the consolidated statements of equity (Note 17).

The percentage of US and international projected benefit obligation at the end of the period is as follows:

	Pension Benefits As of December 31,		Postretirement Benefits As of December 31,
	2017	2016	2017	2016
	(In percentages)
US plans	83	85	54	57
International plans	17	15	46	43
Total	100	100	100	100

The percentage of US and international fair value of plan assets at the end of the period is as follows:

	Pension Benefits As of December 31,
	2017	2016
	(In percentages)
US plans	88	88
International plans	12	12
Total	100	100

Pension plans with projected benefit obligations in excess of plan assets are as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Projected benefit obligation	882	3,559
Fair value of plan assets	341	2,711

Pension plans with accumulated benefit obligations in excess of plan assets are as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Accumulated benefit obligation	861	3,538
Fair value of plan assets	338	2,708

The accumulated benefit obligation for all defined benefit pension plans is as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Accumulated benefit obligation	3,710	3,591

Beginning in 2016, the Company adopted a full yield curve approach to estimate the service and interest cost components of net periodic benefit cost (Note 2). The Company's adoption of the full yield curve approach reduced 2016 service and interest cost by $29 million as compared to the previous single weighted average discount rate method.

The components of net periodic benefit cost are as follows:

	Pension Benefits Year Ended December 31,						Postretirement Benefits Year Ended December 31,
	2017		2016		2015		2017		2016		2015
	(In $ millions)
Service cost	9		8		12		1		—		1
Interest cost	107		113		139		1		2		3
Expected return on plan assets	(198	)	(177	)	(209	)	—		—		—
Amortization of prior service cost / (credit)	—		—		—		(1	)	(3	)	—
Recognized actuarial (gain) loss	48		101		134		(2	)	2		(7	)
Curtailment (gain) loss	—		—		(3	)	—		—		—
Settlement (gain) loss	—		—		—		—		—		—
Special termination benefit	1		3		2		—		—		—
Total	(33	)	48		75		(1	)	1		(3	)

Amortization of Accumulated other comprehensive income (loss), net into net periodic benefit cost in 2018 is expected to be as follows:

	Pension Benefits	Postretirement Benefits
	(In $ millions)
Prior service cost	—	—

The Company maintains nonqualified pension plans funded with nonqualified trusts for certain US employees as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Nonqualified Trust Assets
Marketable securities, at fair value	32	30
Noncurrent Other assets, consisting of insurance contracts	42	49
Nonqualified Pension Obligations
Current Other liabilities	22	22
Benefit obligations	237	241

Expense relating to the nonqualified pension plans included in net periodic benefit cost, excluding returns on the assets held by the nonqualified trusts, is as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Total	18	18	—	(1)

______________________________

⁽¹⁾  Actuarial gain offset interest cost.

Valuation

The principal weighted average assumptions used to determine benefit obligation are as follows:

	Pension Benefits As of December 31,		Postretirement Benefits As of December 31,
	2017	2016	2017	2016
	(In percentages)
Discount Rate Obligations
US plans	3.5	3.9	3.4	3.8
International plans	2.1	2.1	3.2	3.3
Combined	3.3	3.7	3.2	3.4
Rate of Compensation Increase
US plans	N/A	N/A
International plans	2.8	2.8
Combined	2.8	2.8

The principal weighted average assumptions used to determine net periodic benefit cost are as follows:

	Pension Benefits Year Ended December 31,			Postretirement Benefits Year Ended December 31,
	2017	2016	2015	2017	2016	2015
	(In percentages)
Discount Rate Obligations
US plans	3.9	4.2	3.9	3.8	4.0	3.7
International plans	2.1	2.6	2.4	3.3	3.6	3.5
Combined	3.7	4.0	3.7	3.4	3.9	3.6
Discount Rate Service Cost(1)
US plans	1.2	4.5	3.9	4.0	4.2	3.7
International plans	2.5	3.1	2.4	3.4	3.8	3.5
Combined	2.5	3.1	3.7	2.9	3.8	3.6
Discount Rate Interest Cost(1)
US plans	3.3	3.4	3.9	3.1	3.1	3.7
International plans	1.7	2.2	2.4	2.9	3.1	3.5
Combined	3.1	3.2	3.7	2.9	3.1	3.6
Expected Return on Plan Assets
US plans	7.5	7.5	8.0
International plans	5.9	6.1	6.0
Combined	7.3	7.3	7.8
Rate of Compensation Increase
US plans	N/A	N/A	N/A
International plans	2.8	2.7	2.8
Combined	2.8	2.7	2.8

______________________________

⁽¹⁾  Beginning in 2016, weighted-average discount rates reflect the adoption of the full yield curve approach.

The Company's health care cost trend assumptions for US postretirement medical plan's net periodic benefit cost are as follows:

	As of December 31,
	2017	2016	2015
	(In percentages, except year)
Health care cost trend rate assumed for next year	9.0	9.5	10.0
Health care cost trend ultimate rate	5.0	5.0	5.0
Health care cost trend ultimate rate year	2026	2026	2026

Assumed health care cost trend rates for US postretirement medical plans have a significant effect on the amounts reported for the health care plans.

The impact of a one percentage point change in the assumed health care cost trend is as follows:

	Trend Rate Change
	Decreases 1%	Increases 1%
	(In $ millions)
Postretirement obligations	2	2
Service and interest cost	—	—

Plan Assets

The weighted average target asset allocations for the Company's pension plans in 2017 are as follows:

	US Plans	International Plans
	(In percentages)
Bonds - domestic to plans	75	59
Equities - domestic to plans	8	16
Equities - international to plans	7	—
Other	10	25
Total	100	100

On average, the actual return on the US qualified defined pension plans' assets over the long-term (20 years) has exceeded the expected long-term rate of asset return assumption. The US qualified defined benefit plans' actual return on assets for the year ended December 31, 2017 was 11.4% versus an expected long-term rate of asset return assumption of 7.5%. The expected long-term rate of asset return assumption used to determine 2018 net periodic benefit cost is 6.8% for the US qualified defined benefit plans.

The Company's defined benefit plan assets are measured at fair value on a recurring basis (Note 2) as follows:

Cash and Cash Equivalents: Foreign and domestic currencies as well as short term securities are valued at cost plus accrued interest, which approximates fair value.

Equity securities, treasuries and corporate debt: Valued at the closing price reported on the active market in which the individual securities are traded. Automated quotes are provided by multiple pricing services and validated by the plan custodian. These securities are traded on exchanges as well as in the over the counter market.

Registered Investment Companies: Composed of various mutual funds and other investment companies whose diversified portfolio is comprised of foreign and domestic equities, fixed income securities, and short-term investments. Investments are valued at the net asset value of units held by the plan at year-end.

Common/Collective Trusts: Composed of various funds whose diversified portfolio is comprised of foreign and domestic equities, fixed income securities, and short-term investments. Investments are valued at the net asset value of units held by the plan at year-end.

Derivatives: Derivative financial instruments are valued in the market using discounted cash flow techniques. These techniques incorporate Level 1 and Level 2 fair value measurement inputs such as interest rates and foreign currency exchange rates. These market inputs are utilized in the discounted cash flow calculation considering the instrument's term, notional amount, discount rate and credit risk. Significant inputs to the derivative valuation for interest rate swaps, foreign currency forwards and swaps, and options are observable in the active markets and are classified as Level 2 in the fair value measurement hierarchy.

Mortgage backed securities: Fair value is estimated based on valuations obtained from third-party pricing services for identical or comparable assets. Mortgage Backed Securities are traded in the over the counter broker/dealer market.

Insurance contracts: Valued at contributions made, plus earnings, less participant withdrawals and administrative expenses, which approximates fair value.

Short-term investment funds: Composed of various funds whose portfolio is comprised of foreign and domestic currencies as well as short-term securities. Investments are valued at the net asset value of units held by the plan at year-end.

Other: Composed of real estate investment trust common stock valued at closing price as reported on the active market in which the individual securities are traded.

	Fair Value Measurement
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Total
	As of December 31,
	2017	2016	2017	2016	2017	2016
	(In $ millions)
Assets
Cash and cash equivalents	5	2	—	—	5	2
Derivatives
Swaps	—	—	8	2	8	2
Equity securities
US companies	—	260	—	—	—	260
International companies	72	345	—	—	72	345
Fixed income
Corporate debt	—	—	776	798	776	798
Treasuries, other debt	48	37	1,411	793	1,459	830
Mortgage backed securities	—	—	7	7	7	7
Insurance contracts	—	—	36	31	36	31
Other	4	24	1	—	5	24
Total investments, at fair value(1)	129	668	2,239	1,631	2,368	2,299
Liabilities
Derivatives
Swaps	—	—	7	2	7	2
Other	—	—	—	1	—	1
Total liabilities	—	—	7	3	7	3
Total net assets(2)	129	668	2,232	1,628	2,361	2,296

______________________________

⁽¹⁾  In accordance with ASU 2015-07 (Note 2), certain investments that are measured at fair value using the NAV per share practical expedient have not been classified in the fair value hierarchy. Total investments, at fair value, for the year ended December 31, 2017 excludes investments in common/collective trusts, registered investment companies and short-term investment funds with fair values of $727 million, $60 million and $96 million, respectively. Total investments, at fair value, for the year ended December 31, 2016 excludes investments in common/collective trusts, registered investment companies and short-term investment funds with fair values of $195 million, $134 million and $149 million, respectively.

⁽²⁾  Total net assets excludes non-financial plan receivables and payables of $25 million and $18 million, respectively, as of December 31, 2017 and $20 million and $10 million, respectively, as of December 31, 2016. Non-financial items include due to/from broker, interest receivables and accrued expenses.

Benefit obligation funding is as follows:

	Total Expected 2018
	(In $ millions)
Cash contributions to defined benefit pension plans	23
Benefit payments to nonqualified pension plans	21
Benefit payments to other postretirement benefit plans	5

The Company's estimates of its US defined benefit pension plan contributions reflect the provisions of the Pension Protection Act of 2006.

Pension and postretirement benefits expected to be paid are as follows:

	Pension Benefit Payments(1)	Company Portion of Postretirement Benefit Cost(2)
	(In $ millions)
2018	235	5
2019	233	5
2020	231	4
2021	227	4
2022	224	4
2023-2027	1,090	18

______________________________

⁽¹⁾  Payments are expected to be made primarily from plan assets.

⁽²⁾  Payments are expected to be made primarily from Company assets.

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Environmental

12 Months Ended

Dec. 31, 2017

Environmental Remediation Obligations [Abstract]

Environmental

Environmental

The Company is subject to environmental laws and regulations worldwide that impose limitations on the discharge of pollutants into the air and water, establish standards for the treatment, storage and disposal of solid and hazardous wastes, and impose record keeping and notification requirements. Failure to timely comply with these laws and regulations may expose the Company to penalties. The Company believes that it is in substantial compliance with all applicable environmental laws and regulations and engages in an on going process of updating its controls to mitigate compliance risks. The Company is also subject to retained environmental obligations specified in various contractual agreements arising from the divestiture of certain businesses by the Company or one of its predecessor companies.

The components of environmental remediation reserves are as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Demerger obligations (Note 24)	28	18
Divestiture obligations (Note 24)	17	16
Active sites	15	16
US Superfund sites	11	11
Other environmental remediation reserves	2	3
Total	73	64

Remediation

Due to its industrial history and through retained contractual and legal obligations, the Company has the obligation to remediate specific areas on its own sites as well as on divested, demerger, orphan or US Superfund sites (as defined below). In addition, as part of the demerger agreement between the Company and Hoechst AG ("Hoechst"), a specified portion of the responsibility for environmental liabilities from a number of Hoechst divestitures was transferred to the Company (Note 24). Certain of these sites, at which the Company maintains continuing involvement, were and continue to be designated as discontinued operations when closed. The Company provides for such obligations when the event of loss is probable and reasonably estimable. The Company believes that environmental remediation costs will not have a material adverse effect on the financial position of the Company, but may have a material adverse effect on the results of operations or cash flows in any given period.

The Company did not record any insurance recoveries during 2017 or have any receivables for insurance recoveries related to these matters as of December 31, 2017. As of December 31, 2017 and 2016, there were receivables of $3 million and $2 million, respectively, from the former owner of the Company's Spondon, Derby, United Kingdom acetate flake, tow and film business, which was acquired in 2007.

German InfraServ Entities

The Company's InfraServ Entities (Note 9) are liable for any residual contamination and other pollution because they own the real estate on which the individual facilities operate. In addition, Hoechst, and its legal successors, as the responsible party under German public law, is liable to third parties for all environmental damage that occurred while it was still the owner of the plants and real estate (Note 24). The contribution agreements entered into in 1997 between Hoechst and the respective operating companies, as part of the divestiture of these companies, provide that the operating companies will indemnify Hoechst, and its legal successors, against environmental liabilities resulting from the transferred businesses. Additionally, the InfraServ Entities have agreed to indemnify Hoechst, and its legal successors, against any environmental liability arising out of or in connection with environmental pollution of any site.

The InfraServ partnership agreements provide that, as between the partners, each partner is responsible for any contamination caused predominantly by such partner. Any liability, which cannot be attributed to an InfraServ partner and for which no third party is responsible, is required to be borne by the InfraServ partnership. Also, under lease agreements entered into by an InfraServ partner as landlord, the tenants agreed to pay certain remediation costs on a pro rata basis.

If an InfraServ partner defaults on its respective indemnification obligations to eliminate residual contamination, the owners of the remaining participation in the InfraServ companies have agreed to fund such liabilities, subject to a number of limitations. To the extent that any liabilities are not satisfied by either the InfraServ Entities or their owners, these liabilities are to be borne by the Company in accordance with the demerger agreement. However, Hoechst, and its legal successors, will reimburse the Company for two-thirds of any such costs. Likewise, in certain circumstances the Company could be responsible for the elimination of residual contamination on several sites that were not transferred to InfraServ companies, in which case Hoechst, and its legal successors, must also reimburse the Company for two-thirds of any costs so incurred.

The Company's ownership interest and environmental liability participation percentages for such liabilities, which cannot be attributed to an InfraServ partner are as follows:

	As of December 31, 2017
	Ownership	Liability	Reserves(1)
	(In percentages)		(In $ millions)
InfraServ GmbH & Co. Gendorf KG(2)	39	10	9
InfraServ GmbH & Co. Hoechst KG	32	40	71
InfraServ GmbH & Co. Knapsack KG(2)	27	22	1

______________________________

⁽¹⁾  Gross reserves maintained by the respective InfraServ entity.

⁽²⁾  See Note 29 for further information.

US Superfund Sites

In the US, the Company may be subject to substantial claims brought by US federal or state regulatory agencies or private individuals pursuant to statutory authority or common law. In particular, the Company has a potential liability under the US Federal Comprehensive Environmental Response, Compensation and Liability Act of 1980, as amended, and related state laws (collectively referred to as "Superfund") for investigation and cleanup costs at certain sites. At most of these sites, numerous companies, including the Company, or one of its predecessor companies, have been notified that the US Environmental Protection Agency ("EPA"), state governing bodies or private individuals consider such companies to be potentially responsible parties ("PRP") under Superfund or related laws. The proceedings relating to these sites are in various stages. The cleanup process has not been completed at most sites, and the status of the insurance coverage for some of these proceedings is uncertain. Consequently, the Company cannot accurately determine its ultimate liability for investigation or cleanup costs at these sites.

As events progress at each site for which it has been named a PRP, the Company accrues, as appropriate, a liability for site cleanup. Such liabilities include all costs that are probable and can be reasonably estimated. In establishing these liabilities, the Company considers the contaminants of concern, the potential impact thereof, the relationship of contaminants of concern to its current and historic operations, its shipment of waste to a site, its percentage of total waste shipped to the site, the types of wastes involved, the conclusions of any studies, the magnitude of any remedial actions that may be necessary and the number and viability of other PRPs. Often the Company joins with other PRPs to sign joint defense agreements that settle, among PRPs, each party's percentage allocation of costs at the site. Although the ultimate liability may differ from the estimate, the Company routinely reviews the liabilities and revises the estimate, as appropriate, based on the most current information available.

One such site is the Diamond Alkali Superfund Site, which is comprised of a number of sub-sites, including the Lower Passaic River Study Area, which is the lower 17-mile stretch of the Passaic River ("Lower Passaic River Site"), and the Newark Bay Area. The Company and 70 other companies are parties to a May 2007 Administrative Order on Consent with the EPA to perform a Remedial Investigation/Feasibility Study ("RI/FS") at the Lower Passaic River Site in order to identify the levels of contaminants and potential cleanup actions, including the potential migration of contaminants between the Lower Passaic River Site and the Newark Bay Area. Work on the RI/FS is ongoing, with a goal to complete it in 2018.

On March 3, 2016, the EPA issued its final Record of Decision concerning the remediation of the lower 8.3 miles of the Lower Passaic River Site ("Lower 8.3 Miles"). Pursuant to the EPA's Record of Decision, the Lower 8.3 Miles must be dredged bank to bank and an engineered cap must be installed at an EPA estimated cost of approximately $1.4 billion. The Company owned and/or operated facilities in the vicinity of the Lower 8.3 Miles, but has found no evidence that it contributed any of the primary contaminants of concern to the Passaic River. The Company is vigorously defending this matter and currently believes that its ultimate allocable share of the cleanup costs with respect to the Lower Passaic River Site, estimated at less than 1%, will not be material to the Company's results of operations, cash flows or financial position.

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Stockholders' Equity

12 Months Ended

Dec. 31, 2017

Stockholders' Equity Note [Abstract]

Stockholders' Equity

Stockholders' Equity

Common Stock

The Company's Board of Directors follows a policy of declaring, subject to legally available funds, a quarterly cash dividend on each share of the Company's Common Stock, unless the Company's Board of Directors, in its sole discretion, determines otherwise.

The Company's Board of Directors approved increases in the Company's Common Stock cash dividend rates as follows:

	Increase	Quarterly Common Stock Cash Dividend	Annual Common Stock Cash Dividend	Effective Date
	(In percentages)	(In $ per share)
April 2015	20	0.30	1.20	May 2015
April 2016	20	0.36	1.44	May 2016
April 2017	28	0.46	1.84	May 2017

On February 8, 2018, the Company declared a quarterly cash dividend of $0.46 per share on its Common Stock amounting to $62 million. The cash dividend will be paid on March 2, 2018 to holders of record as of February 20, 2018.

Treasury Stock

The Company's Board of Directors authorizes repurchases of Common Stock from time to time. These authorizations give management discretion in determining the timing and conditions under which shares may be repurchased. This repurchase program does not have an expiration date.

The share repurchase activity pursuant to this authorization is as follows:

	Year Ended December 31,							Total From February 2008 Through December 31, 2017
	2017		2016		2015
Shares repurchased	5,436,803		7,034,420		6,640,601		(1)	39,779,019
Average purchase price per share	$	91.97	$	71.08	$	63.31		$	58.71
Amount spent on repurchased shares (in millions)	$	500	$	500	$	420		$	2,335
Aggregate Board of Directors repurchase authorizations during the period (in millions)(2)	$	1,500	$	—	$	1,000		$	3,866

______________________________

⁽¹⁾  The year ended December 31, 2015 excludes 9,264 shares withheld from an executive officer to cover statutory minimum withholding requirements for personal income taxes related to the vesting of restricted stock. Restricted stock awards are considered outstanding at the time of issuance. Accordingly, the shares withheld are treated as treasury shares.

⁽²⁾  These authorizations give management discretion in determining the timing and conditions under which shares may be repurchased. This repurchase program began in February 2008 and does not have an expiration date.

The purchase of treasury stock reduces the number of shares outstanding. The repurchased shares may be used by the Company for compensation programs utilizing the Company's stock and other corporate purposes. The Company accounts for treasury stock using the cost method and includes treasury stock as a component of stockholders' equity.

Other Comprehensive Income (Loss), Net

	Year Ended December 31,
	2017					2016					2015
	Gross Amount	Income Tax (Provision) Benefit		Net Amount		Gross Amount		Income Tax (Provision) Benefit	Net Amount		Gross Amount		Income Tax (Provision) Benefit		Net Amount
	(In $ millions)
Unrealized gain (loss) on marketable securities	—	(1	)	(1	)	—		—	—		—		—		—
Foreign currency translation	162	12		174		(22	)	11	(11	)	(193	)	5		(188	)
Gain (loss) on cash flow hedges	—	(1	)	(1	)	5		—	5		3		(1	)	2
Pension and postretirement benefits	7	2		9		(5	)	1	(4	)	4		(1	)	3
Total	169	12		181		(22	)	12	(10	)	(186	)	3		(183	)

Adjustments to Accumulated other comprehensive income (loss), net, are as follows:

	Unrealized Gain (Loss) on Marketable Securities (Note 6)		Foreign Currency Translation		Gain (Loss) from Cash Flow Hedges (Note 22)		Pension and Postretirement Benefits (Note 15)		Accumulated Other Comprehensive Income (Loss), Net
	(In $ millions)
As of December 31, 2014	1		(151	)	(4	)	(11	)	(165	)
Other comprehensive income (loss) before reclassifications	—		(193	)	(2	)	6		(189	)
Amounts reclassified from accumulated other comprehensive income (loss)	—		—		5		(2	)	3
Income tax (provision) benefit	—		5		(1	)	(1	)	3
As of December 31, 2015	1		(339	)	(2	)	(8	)	(348	)
Other comprehensive income (loss) before reclassifications	—		(22	)	7		(3	)	(18	)
Amounts reclassified from accumulated other comprehensive income (loss)	—		—		(2	)	(2	)	(4	)
Income tax (provision) benefit	—		11		—		1		12
As of December 31, 2016	1		(350	)	3		(12	)	(358	)
Other comprehensive income (loss) before reclassifications	—		162		4		8		174
Amounts reclassified from accumulated other comprehensive income (loss)	—		—		(4	)	(1	)	(5	)
Income tax (provision) benefit	(1	)	12		(1	)	2		12
As of December 31, 2017	—		(176	)	2		(3	)	(177	)

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Other (Charges) Gains, Net

12 Months Ended

Dec. 31, 2017

Restructuring and Related Activities [Abstract]

Other (Charges) Gains, Net

Other (Charges) Gains, Net

	Year Ended December 31,
	2017		2016		2015
	(In $ millions)
Employee termination benefits (Note 4)(1)	(4	)	(11	)	(53	)
InfraServ ownership change	(4	)	—		—
Asset impairments	—		(2	)	(126	)
Other plant/office closures	(52	)	—		—
Singapore contract termination	—		—		(174	)
Commercial disputes	—		2		2
Total	(60	)	(11	)	(351	)

______________________________

⁽¹⁾  Includes $1 million and $3 million of special termination benefits included in Benefit obligations in the consolidated balance sheet as of December 31, 2017 and 2016, respectively.

2017

During the year endedDecember 31, 2017, the Company recorded $4 million of employee termination benefits primarily related to the Company's ongoing efforts to align its businesses around its core value drivers.

A partner in the Company's InfraServ equity affiliate investments exercised an option right, which was disputed, to purchase additional ownership interests in the InfraServ entities from the Company. The purchase of these interests will reduce the Company's ownership interests in InfraServ GmbH & Co. Gendorf KG and InfraServ GmbH & Co. Knapsack KG from 39% and 27%, to 30% and 22%, respectively. Accordingly, during the year endedDecember 31, 2017, the Company reduced the carrying value of these investments by $4 million. In addition, the Company has reserved certain amounts for dividends received from the investments since the exercise notification was received. These InfraServ investments are primarily owned by entities included in the Other Activities segment. See Note 29 for further information.

During the year endedDecember 31, 2017, the Company provided notice of termination of a contract with a key raw materials supplier at its ethanol production unit in Nanjing, China. As a result, the Company recorded an estimated $51 million of plant/office closure costs primarily consisting of a $22 million contract termination charge and a $21 million reduction to its non-income tax receivable. The Nanjing, China ethanol production unit is included in the Company's Acetyl Intermediates segment.

2016

During the year ended December 31, 2016, the Company recorded $11 million of employee termination benefits primarily related to the Company's ongoing efforts to align its businesses around its core value drivers.

2015

During the year ended December 31, 2015, the Company recorded $21 million of employee termination benefits related to the Company's ongoing efforts to align its businesses around its core value drivers. In addition, the Company recorded $24 million of employee termination benefits related to a 50% capacity reduction at its Lanaken, Belgium acetate tow facility (Note 4).

In addition, during the year ended December 31, 2015, the Company recorded $6 million of employee termination benefits and $1 million of long-lived asset impairment losses related to the closure of its VAE emulsions facility in Tarragona, Spain (Note 4). In addition, the Company recorded $1 million of employee termination benefits and $1 million of long-lived asset impairment losses related to the closure of its VAE emulsions facility in Meredosia, Illinois (Note 4). The long-lived asset impairment losses related to both VAE facilities were measured at the dates of impairment to write-off the related property, plant and equipment at each facility (Note 2 and Note 4).

During the three months ended December 31, 2015, the Company determined its ethanol production unit at its acetyl facility in Nanjing, China should be assessed for impairment based on market conditions affecting demand for ethanol and downstream products, the cost to operate the unit and contractual obligations. As a result, the Company concluded that certain long-lived ethanol related assets were fully impaired. Accordingly, the Company recorded long-lived asset impairment losses, measured at the date of impairment (Note 2), of $123 million to fully write-off certain ethanol related assets. The Nanjing, China asset impairment is included in the Company's Acetyl Intermediates segment.

In December 2015, the Company made a payment terminating an existing agreement with a raw materials supplier in Singapore and recognized a $174 million charge, which reflects a discounted amount previously owed under that contract. This termination payment was determined not to have future economic benefit, and the contract's original terms substantially contributed to cumulative losses which resulted in a full impairment of the production assets in 2013. This charge is recorded in Other (charges) gains net, which is included in the Company's Acetyl Intermediates segment.

The changes in the restructuring reserves by business segment are as follows:

	Advanced Engineered Materials		Consumer Specialties		Industrial Specialties		Acetyl Intermediates		Other		Total
	(In $ millions)
Employee Termination Benefits
As of December 31, 2015	3		14		6		1		6		30
Additions	2		2		2		1		3		10
Cash payments	(3	)	(6	)	(6	)	(1	)	(5	)	(21	)
Other changes	(1	)	—		—		—		(1	)	(2	)
Exchange rate changes	—		(1	)	—		—		—		(1	)
As of December 31, 2016	1		9		2		1		3		16
Additions	1		2		—		—		1		4
Cash payments	(1	)	(3	)	(2	)	—		(2	)	(8	)
Other changes	—		(8	)	—		—		(1	)	(9	)
Exchange rate changes	—		—		—		—		—		—
As of December 31, 2017	1		—		—		1		1		3
Other Plant/Office Closures
As of December 31, 2015	—		—		—		—		—		—
Additions	—		—		—		—		—		—
Cash payments	—		—		—		—		—		—
Other changes	—		—		—		—		—		—
Exchange rate changes	—		—		—		—		—		—
As of December 31, 2016	—		—		—		—		—		—
Additions	—		—		—		29		—		29
Cash payments	—		—		—		(24	)	—		(24	)
Other changes	—		—		—		(3	)	—		(3	)
Exchange rate changes	—		—		—		—		—		—
As of December 31, 2017	—		—		—		2		—		2
Total	1		—		—		3		1		5

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Income Taxes

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

On December 22, 2017, the Tax Cuts and Jobs Act (the "TCJA") was enacted and is effective January 1, 2018. ASC 740, Accounting for Income Taxes, requires companies to recognize the effects of tax law changes in the period of enactment. This overhaul of the US tax law made a number of substantial changes, including the reduction of the corporate tax rate from 35% to 21%, establishing a dividends received deduction for dividends paid by foreign subsidiaries to the US, elimination or limitation of certain deductions (interest, domestic production activities and executive compensation), imposing a mandatory tax on previously unrepatriated earnings accumulated offshore since 1986 and establishing global minimum income tax and base erosion tax provisions related to offshore activities and affiliated party payments.

The deemed repatriation of previously unremitted foreign earnings, of which the Company had approximately $3.0 billion as of December 31, 2017, will be taxed at 8% to the extent those earnings were reinvested in non-cash foreign assets, while previously unremitted earnings that have not been reinvested, computed based upon a two-year historical average of foreign cash and cash equivalents balances, will be taxed at 15.5%. The Company estimated its gross charge for the deemed repatriation of foreign earnings to be approximately $370 million. The deemed repatriation requires the recognition of both unrepatriated earnings, as well as various existing offshore foreign tax credits and attributes, resulting in an estimated net charge for the deemed repatriation of $197 million recorded in 2017. In addition to offshore foreign tax credits, existing foreign tax credit carryforwards in the US will be available to offset this tax charge. Due to the availability of foreign tax credit carryforwards, the Company does not expect a material cash impact from this repatriation provision and any remaining portion of the tax not covered by tax credits will be paid in installments over an eight year period.

The Company was also required to adjust the recorded amounts of its US deferred tax assets and liabilities resulting from the reduction in the US corporate tax rate and the impact of the dividends received deduction provisions on its deferred tax liabilities related to outside basis differences in certain joint venture investments. As a result of these changes, the Company recognized a tax benefit of approximately $107 million in 2017.

The global minimum income tax and base erosion provisions are effective for taxable years beginning after December 31, 2017. The Company does not currently expect these provisions to have a material impact on its tax rate. Based on initial guidance from the FASB, the Company has elected not to record deferred taxes related to future liabilities due to the minimum tax on global low taxed intangible income.

Due to the timing of the new tax law and the substantial changes it brings, the Staff of the Securities and Exchange Commission (the "SEC") issued Staff Accounting Bulletin No. 118 ("SAB 118"), which provides registrants a measurement period to report the impact of the new US tax law. During the measurement period, provisional amounts for the effects of the law are recorded to the extent a reasonable estimate can be made. To the extent that all information necessary is not available, prepared or analyzed, companies may recognize provisional estimated amounts for a period of up to one year following enactment of the TCJA.

The Company has recorded provisional amounts for several of the impacts of the new tax law including: the deemed repatriation tax on post-1986 accumulated earnings and profits, the deferred tax rate change effect of the new law, gross foreign tax credit carryforwards and related valuation allowances to offset foreign tax credit carryforwards. Certain items or estimates that result in impacts of the TCJA being provisional include: detailed foreign earnings calculations for the most recent period, projected foreign cash balances for certain foreign subsidiaries and finalized computations of foreign tax credit availability. In addition, the Company's 2017 US federal income tax return will not be finalized until later in 2018, and while historically this process has resulted in offsetting changes in estimates in current and deferred taxes for items which are timing related, the reduction of the US tax rate will result in adjustments to the Company's income tax (provision) benefit when recorded. Finally, the Company considers it likely that further technical guidance regarding certain of the new provisions included in the TCJA, as well as clarity regarding state income tax conformity to current federal tax code, may be issued.

Income Tax Provision

Earnings (loss) from continuing operations before tax by jurisdiction are as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
US	262	326	231
International	813	704	257
Total	1,075	1,030	488

The income tax provision (benefit) consists of the following:

	Year Ended December 31,
	2017		2016		2015
	(In $ millions)
Current
US	201		(22	)	28
International	158		60		152
Total	359		38		180
Deferred
US	(110	)	108		54
International	(36	)	(24	)	(33	)
Total	(146	)	84		21
Total	213		122		201

A reconciliation of the significant differences between the US federal statutory tax rate of 35% and the effective income tax rate on income from continuing operations is as follows:

	Year Ended December 31,
	2017		2016		2015
	(In $ millions, except percentages)
Income tax provision computed at US federal statutory tax rate	376		361		171
Change in valuation allowance	218		(18	)	124
Equity income and dividends	(87	)	(60	)	(33	)
(Income) expense not resulting in tax impact, net	(157	)	(152	)	(32	)
US tax effect of foreign earnings and dividends	521		302		15
Foreign tax credits	(759	)	(293	)	(4	)
Other foreign tax rate differentials	(38	)	(48	)	(47	)
Legislative changes	116		4		9
State income taxes, net of federal benefit	12		8		6
Other, net	11		18		(8	)
Income tax provision (benefit)	213		122		201
Effective income tax rate	20	%	12	%	41	%

As a result of the TCJA, US federal and state income taxes have been recorded on undistributed foreign earnings accumulated from 1986 through December 31, 2017. Based on the provisions of the law, the Company's previously taxed income for its foreign subsidiaries significantly exceeds its cash balances offshore. The Company has not recorded a deferred tax liability for foreign withholding or other foreign local tax that would be due when cash is repatriated to the US as such foreign earnings are considered permanently reinvested in the business or may be remitted substantially free of any additional local taxes. The determination of the amount of the unrecognized deferred tax liability related to the undistributed earnings is not practicable.

The higher effective tax rate for the year endedDecember 31, 2017 is primarily due to the impact of the TCJA (which is recorded in the Change in valuation allowance and Legislative changes lines, in the effective tax rate reconciliation above), increased losses in jurisdictions with no tax benefit and current year taxes related to internal restructuring for the Company's proposed acetate tow joint venture with Blackstone (Note 4) (which is recorded in the US tax effect of foreign earnings and dividends and the Foreign tax credits lines, above). The increases in losses without tax benefit primarily relate to $51 million of plant/office closure costs related to the Company's notice of termination of a contract with a key raw materials supplier at its ethanol production unit in Nanjing, China (Note 18), which is recorded in the Change in valuation allowance line above.

The lower effective tax rate for the year endedDecember 31, 2016 was primarily due to the settlement of uncertain tax positions and technical clarifications in Germany and the US of $55 million, which was recorded in the Other, net line above.

The higher effective rate for the year ended December 31, 2015 was due to increased losses in jurisdictions with no tax benefit. The increased losses primarily related to a $123 million long-lived asset impairment recorded to fully write-off certain ethanol related assets at the Company's acetyl facility in Nanjing, China and a $174 million charge related to the termination of a raw materials contract with a supplier in Singapore (Note 18), which was recorded in the Change in valuation allowance line above. These losses without tax benefit impacted 2015, but did not recur in 2016. The tax impact of these events was partially offset by decreases in uncertain tax positions of $29 million due to audit closures and technical jurisdictional clarifications, which was recorded in the Other, net line above.

During 2017, the Company undertook various internal reorganization transactions to separate certain assets to reorganize the holdings of its various foreign subsidiaries in preparation for contribution of those assets to its proposed acetate tow joint venture with Blackstone (Note 4). As a result, the Company generated additional net foreign tax credit carryforwards of approximately $240 million, the gross impacts of which are reflected in the Foreign tax credit line and the US tax effect of foreign earnings lines above in the effective tax rate reconciliation, that will be carried forward to future tax periods. These new credit carryforwards, as well as balances carried into 2017, were evaluated for realizability under the provisions of the TCJA. Due to the TCJA and uncertainty as to future sources of general limitation foreign source income to allow for utilization of these credits, the Company recorded a valuation allowance on these foreign tax credits in the amount of $164 million, which is recorded in the Change in valuation allowance line in the effective tax rate reconciliation.

Deferred Income Taxes

Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the consolidated deferred tax assets and liabilities are as follows:

	As of December 31,
	2017		2016
	(In $ millions)
Deferred Tax Assets
Pension and postretirement obligations(1)	143		313
Accrued expenses	50		61
Inventory	10		11
Net operating loss	703		661
Tax credit carryforwards(2)	478		136
Other	192		161
Subtotal	1,576		1,343
Valuation allowance(3)	(618	)	(386	)
Total	958		957
Deferred Tax Liabilities
Depreciation and amortization	307		366
Investments in affiliates	427		475
Other	69		87
Total	803		928
Net deferred tax assets (liabilities)	155		29

______________________________

⁽¹⁾  For the year ended December 31, 2017, the pension and postretirement obligations decreased primarily due to $316 million in employer contributions made to the US defined benefit plans (Note 15).

⁽²⁾  For the year ended December 31, 2017, the tax credit carryforwards increased primarily due to internal reorganization transactions made in preparation for the proposed acetate tow joint venture with Blackstone discussed herein and Note 4.

⁽³⁾  Includes deferred tax asset valuation allowances for the Company's deferred tax assets in the US, Luxembourg, Spain, China, Singapore, the United Kingdom, Canada and France. These valuation allowances relate primarily to net operating loss carryforward benefits and other net deferred tax assets, all of which may not be realizable. For the year ended December 31, 2017, the valuation allowance increased primarily due to the impact of the TCJA on excess foreign tax credits.

Net Operating Loss Carryforwards and Tax Credit Carryforwards

As of December 31, 2017, the Company has US federal net operating loss carryforwards of $35 million that are subject to limitation. These net operating loss carryforwards begin to expire in 2021. As of December 31, 2017, the Company also had state net operating loss carryforwards, net of federal tax impact, of $42 million, $38 million of which are offset by a valuation allowance due to uncertain recoverability. The Company also has foreign net operating loss carryforwards as of December 31, 2017 of $2.6 billion primarily for Luxembourg, Spain, Canada, China, Singapore and the United Kingdom, with various expiration dates. Net operating loss carryforwards of $473 million in China are set to expire beginning in 2018 through 2022. Net operating losses in most other foreign jurisdictions do not have an expiration date.

The Company's tax credit carryforwards primarily consist of $452 million of foreign tax credit carryforwards, which are partially offset by a valuation allowance of $164 million due to uncertain recoverability and $21 million of alternative minimum tax credit carryforwards in the US. The foreign tax credit carryforwards are subject to a ten-year carryforward period and will begin to expire in 2027 if not utilized prior to that time. The alternative minimum tax credits are subject to annual limitation due to prior ownership changes, but have an unlimited carryforward period and will be used to offset federal tax liability in future years.

Uncertain Tax Positions

Activity related to uncertain tax positions is as follows:

	Year Ended December 31,
	2017		2016		2015
	(In $ millions)
As of the beginning of the year	114		158		228
Increases in tax positions for the current year	14		9		13
Increases in tax positions for prior years(1)	4		11		76
Decreases in tax positions for prior years	(7	)	(9	)	(126	)
Decreases due to settlements	(6	)	(55	)	(33	)
As of the end of the year	119		114		158
Total uncertain tax positions that if recognized would impact the effective tax rate	100		87		144
Total amount of interest expense (benefit) and penalties recognized in the consolidated statements of operations(2)	6		(16	)	(12	)
Total amount of interest expense and penalties recognized in the consolidated balance sheets	38		26		43

______________________________

⁽¹⁾  Includes uncertain tax positions related to the Nilit acquisition (Note 4) of $4 million for the year ended December 31, 2017.

⁽²⁾  This amount reflects interest on uncertain tax positions and release of certain tax positions as a result of audit closure that was reflected in the consolidated statements of operations. In addition, for the years ended December 31, 2016 and 2015, the Company also paid an additional $1 million and $12 million, respectively, of previously accrued amounts due to settlements of tax examinations.

The Company primarily operates in the US, Germany, Belgium, Canada, China, Mexico and Singapore. Examinations are ongoing in a number of these jurisdictions. The Company's US tax returns for the years 2009 through 2015 are currently under audit by the US Internal Revenue Service. Outside of the US, the Company's German tax returns for the years 2008 through 2015 are under audit as well as certain of the Company's other subsidiaries within their respective jurisdictions.

The decrease in uncertain tax positions for the year ended December 31, 2016 is primarily due to audit closures and technical judicial clarifications. While it is reasonably possible that a further change in the unrecognized tax benefits may occur within the next twelve months related to the settlement of one or more of these audits, the Company is unable to estimate the amount of any such change.

In connection with the Company's US federal income tax audit for 2009 and 2010, the Company has received $192 million of proposed pre-tax adjustments related to various intercompany charges. In January 2018, the Company received proposed pre-tax adjustments for its 2011 and 2012 audit cycle in the amount of $198 million. In the event the Company is wholly unsuccessful in its defense and absent expected off-setting adjustments from foreign tax authorities, the proposed adjustments would result in the consumption of approximately $136 million of prior foreign tax credit carryforwards. The Company believes these proposed adjustments to be without merit and is vigorously defending its position.

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Management Compensation Plans

12 Months Ended

Dec. 31, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Management Compensation Plans

Management Compensation Plans 

General Plan Description

The Company issues stock-based awards under its 2009 GIP, which enables the compensation committee of the Board of Directors to award incentive and nonqualified stock options, stock appreciation rights, shares of Common Stock, restricted stock awards, RSUs and incentive bonuses (which may be paid in cash or stock or a combination thereof), any of which may be performance-based, with vesting and other award provisions that provide effective incentive to Company employees (including officers), non-management directors and other service providers.

Total shares available for awards and total shares subject to outstanding awards are as follows:

	As of December 31, 2017
	Shares Available for Awards	Shares Subject to Outstanding Awards
2009 GIP	5,663,628	1,701,713

The Company realized income tax benefits from stock option exercises and RSU vestings as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Income tax benefit realized	9	7	2

Restricted Stock Units

A summary of changes in nonvested performance-based RSUs outstanding is as follows:

	Number of Units		Weighted Average Grant Date Fair Value
	(In thousands)		(In $)
As of December 31, 2016	1,085		53.36
Granted	314		83.52
Additional performance-based RSUs granted(1)	225		48.70
Vested	(527	)	49.36
Canceled	(150	)	53.21
Forfeited	(87	)	62.36
As of December 31, 2017	860		64.71

______________________________

⁽¹⁾  Represents additional performance-based RSU grants in 2014 that were awarded in 2017 as a result of achieving internal profitability targets.

The fair value of shares vested for performance-based RSUs is as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Total	42	64	27

A summary of changes in nonvested time-based RSUs outstanding is as follows:

	Number of Units		Weighted Average  Grant Date Fair Value
	(In thousands)		(In $)
As of December 31, 2016	344		67.42
Granted	159		86.20
Vested	(123	)	67.78
Forfeited	(29	)	68.29
As of December 31, 2017	351		75.75

The fair value of shares vested for time-based RSUs is as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Total	12	4	6

As of December 31, 2017, there was $52 million of unrecognized compensation cost related to RSUs, excluding actual forfeitures, which is expected to be recognized over a weighted average period of two years.

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Leases

12 Months Ended

Dec. 31, 2017

Leases [Abstract]

Leases

Leases

Future minimum lease payments under non-cancelable rental and lease agreements, which have initial or remaining terms in excess of one year are as follows:

	As of December 31, 2017
	Capital Leases
	(In $ millions)
2018	53
2019	46
2020	45
2021	44
2022	33
Later years	114
Sublease income	—
Minimum lease commitments	335
Less amounts representing interest	(127	)
Present value of net minimum lease obligations	208

	As of December 31, 2017
	Operating Leases
	(In $ millions)
2018	54
2019	47
2020	37
2021	28
2022	22
Later years	155
Sublease income	—
Minimum lease commitments	343

The Company expects that, in the normal course of business, leases that expire will be renewed or replaced by other leases.

Rent expense recorded under all operating leases is as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Total	159	154	154

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Derivative Financial Instruments

12 Months Ended

Dec. 31, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

Derivative Financial Instruments

Cash Flow Hedges

Cross-currency Swaps

In March 2015, the Company settled its cross-currency swap agreements with notional values of $250 million/€193 million, expiring on September 11, 2020, and $225 million/€162 million, expiring on April 17, 2019, in exchange for cash of $88 million. The Company classifies cash flows from derivative instruments designated as cash flow hedges in the same category of the consolidated statement of cash flows as the cash flows from the items being hedged. Accordingly, the settlement of the cross-currency swap agreements was included in Net cash provided by (used in) operating activities in the consolidated statement of cash flows for the year ended December 31, 2015.

Net Investment Hedges

The total notional amount of foreign currency denominated debt designated as a net investment hedge of net investments in foreign operations are as follows:

	As of December 31,
	2017	2016
	(In € millions)
Total	1,050	850

Foreign Currency Forwards and Swaps

Each of the contracts included in the table below will have approximately offsetting effects from actual underlying payables, receivables, intercompany loans or other assets or liabilities subject to foreign exchange remeasurement. The total US dollar equivalents of net foreign exchange exposure related to (short) long foreign exchange forward contracts outstanding by currency are as follows:

	2017 Maturity
	(In $ millions)
Currency
Brazilian real	(13	)
British pound sterling	(93	)
Canadian dollar	36
Euro	(6	)
Hungarian forint	10
Korean won	10
Singapore dollar	32
Swedish krona	(4	)
Total	(28	)

Gross notional values of the foreign currency forwards and swaps are as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Total	740	508

Hedging activity for foreign currency forwards and commodity swaps is as follows:

	Year Ended December 31,			Statement of Operations Classification
	2017	2016	2015
	(In $ millions)
Hedging activities	4	2	2	Cost of sales
Ineffective portion of hedging activities	—	—	—	Other income (expense), net

Information regarding changes in the fair value of the Company's derivative and non-derivative instruments is as follows:

	Gain (Loss) Recognized in Other Comprehensive Income (Loss)				Gain (Loss) Recognized in Earnings (Loss)					Statement of Operations Classification
	Year Ended December 31,				Year Ended December 31,
	2017		2016	2015	2017		2016	2015
	(In $ millions)
Designated as Cash Flow Hedges
Commodity swaps	4		7	—	5		2	—		Cost of sales
Cross-currency swaps	—		—	—	—		—	46		Other income (expense), net or Foreign exchange gain (loss)
Foreign currency forwards	(1	)	—	—	(1	)	—	—		Cost of sales
Total	3		7	—	4		2	46
Designated as a Net Investment Hedge
Foreign currency denominated debt (Note 14)	(119	)	61	48	—		—	—		N/A
Foreign currency forwards	2		—	—	—		—	—		N/A
Total	(117	)	61	48	—		—	—
Not Designated as Hedges
Interest rate swaps	—		—	—	—		—	(1	)	Interest expense
Foreign currency forwards and swaps	—		—	—	2		14	(82	)	Foreign exchange gain (loss), net; Other income (expense), net
Total	—		—	—	2		14	(83	)

See Note 23 for additional information regarding the fair value of the Company's derivative instruments.

Certain of the Company's commodity swaps and foreign currency forwards and swaps permit the Company to net settle all contracts with the counterparty through a single payment in an agreed upon currency in the event of default or early termination of the contract, similar to a master netting arrangement.

Information regarding the gross amounts of the Company's derivative instruments and the amounts offset in the consolidated balance sheets is as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Derivative Assets
Gross amount recognized	13	14
Gross amount offset in the consolidated balance sheets	4	4
Net amount presented in the consolidated balance sheets	9	10
Gross amount not offset in the consolidated balance sheets	3	2
Net amount	6	8

	As of December 31,
	2017	2016
	(In $ millions)
Derivative Liabilities
Gross amount recognized	7	7
Gross amount offset in the consolidated balance sheets	4	4
Net amount presented in the consolidated balance sheets	3	3
Gross amount not offset in the consolidated balance sheets	3	2
Net amount	—	1

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Fair Value Measurements

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

The Company's financial assets and liabilities are measured at fair value on a recurring basis (Note 2) as follows:

Derivatives. Derivative financial instruments include commodity swaps and foreign currency forwards and swaps and are valued in the market using discounted cash flow techniques. These techniques incorporate Level 1 and Level 2 fair value measurement inputs such as interest rates and foreign currency exchange rates. These market inputs are utilized in the discounted cash flow calculation considering the instrument's term, notional amount, discount rate and credit risk. Significant inputs to the derivative valuation for commodity swaps and foreign currency forwards and swaps are observable in the active markets and are classified as Level 2 in the fair value measurement hierarchy.

	Fair Value Measurement										Balance Sheet Classification
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)				Total
	As of December 31,
	2017	2016	2017		2016		2017		2016
	(In $ millions)
Derivatives Designated as Cash Flow Hedges
Commodity swaps	—	—	2		5		2		5		Current Other assets
Commodity swaps	—	—	2		—		2		—		Noncurrent Other assets
Derivatives Not Designated as Hedges
Foreign currency forwards and swaps	—	—	5		5		5		5		Current Other assets
Total assets	—	—	9		10		9		10
Derivatives Not Designated as Hedges
Foreign currency forwards and swaps	—	—	(3	)	(3	)	(3	)	(3	)	Current Other liabilities
Total liabilities	—	—	(3	)	(3	)	(3	)	(3	)

Carrying values and fair values of financial instruments that are not carried at fair value are as follows:

			Fair Value Measurement
	Carrying Amount		Significant Other Observable Inputs (Level 2)		Unobservable Inputs (Level 3)		Total
	As of December 31,
	2017	2016	2017	2016	2017	2016	2017	2016
	(In $ millions)
Cost investments	159	155	—	—	—	—	—	—
Insurance contracts in nonqualified trusts	42	49	42	49	—	—	42	49
Long-term debt, including current installments of long-term debt	3,398	2,938	3,299	2,826	208	217	3,507	3,043

In general, the cost investments included in the table above are not publicly traded and their fair values are not readily determinable; however, the Company believes the carrying values approximate or are less than the fair values. Insurance contracts in nonqualified trusts consist of long-term fixed income securities, which are valued using independent vendor pricing models with observable inputs in the active market and therefore represent a Level 2 fair value measurement. The fair value of long-term debt is based on valuations from third-party banks and market quotations and is classified as Level 2 in the fair value measurement hierarchy. The fair value of obligations under capital leases, which are included in long-term debt, is based on lease payments and discount rates, which are not observable in the market and therefore represents a Level 3 fair value measurement.

As of December 31, 2017 and 2016, the fair values of cash and cash equivalents, receivables, trade payables, short-term borrowings and the current installments of long-term debt approximate carrying values due to the short-term nature of these instruments. These items have been excluded from the table with the exception of the current installments of long-term debt.

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Commitments and Contingencies

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Commitments

Guarantees

The Company has agreed to guarantee or indemnify third parties for environmental and other liabilities pursuant to a variety of agreements, including asset and business divestiture agreements, leases, settlement agreements and various agreements with affiliated companies. Although many of these obligations contain monetary and/or time limitations, others do not provide such limitations.

As indemnification obligations often depend on the occurrence of unpredictable future events, the future costs associated with them cannot be determined at this time.

The Company has accrued for all probable and reasonably estimable losses associated with all known matters or claims. These known obligations include the following:

• Demerger Obligations

In connection with the Hoechst demerger, the Company agreed to indemnify Hoechst, and its legal successors, for various liabilities under the demerger agreement, including for environmental liabilities associated with contamination arising either from environmental damage in general ("Category A") or under 19 divestiture agreements entered into by Hoechst prior to the demerger ("Category B") (Note 16).

The Company's obligation to indemnify Hoechst, and its legal successors, is capped under Category B at €250 million. If and to the extent the environmental damage should exceed €750 million in aggregate, the Company's obligation to indemnify Hoechst and its legal successors applies, but is then limited to 33.33% of the remediation cost without further limitations. Cumulative payments under the divestiture agreements as of December 31, 2017 are $80 million. Most of the divestiture agreements have become time barred and/or any notified environmental damage claims have been partially settled.

The Company has also undertaken in the demerger agreement to indemnify Hoechst and its legal successors for (i) 33.33% of any and all Category A liabilities that result from Hoechst being held as the responsible party pursuant to public law or current or future environmental law or by third parties pursuant to private or public law related to contamination and (ii) liabilities that Hoechst is required to discharge, including tax liabilities, which are associated with businesses that were included in the demerger but were not demerged due to legal restrictions on the transfers of such items. These indemnities do not provide for any monetary or time limitations. The Company has not been requested by Hoechst to make any payments in connection with this indemnification. Accordingly, the Company has not made any payments to Hoechst and its legal successors.

Based on the Company's evaluation of currently available information, including the lack of requests for indemnification, the Company cannot estimate the Possible Loss for the remaining demerger obligations, if any, in excess of amounts accrued.

• Divestiture Obligations

The Company and its predecessor companies agreed to indemnify third-party purchasers of former businesses and assets for various pre-closing conditions, as well as for breaches of representations, warranties and covenants. Such liabilities also include environmental liability, product liability, antitrust and other liabilities. These indemnifications and guarantees represent standard contractual terms associated with typical divestiture agreements and, other than environmental liabilities, the Company does not believe that they expose the Company to any significant risk (Note 16).

The Company has divested numerous businesses, investments and facilities through agreements containing indemnifications or guarantees to the purchasers. Many of the obligations contain monetary and/or time limitations, which extend through 2037. The aggregate amount of outstanding indemnifications and guarantees provided for under these agreements is $122 million as of December 31, 2017. Other agreements do not provide for any monetary or time limitations.

Based on the Company's evaluation of currently available information, including the number of requests for indemnification or other payment received by the Company, the Company cannot estimate the Possible Loss for the remaining divestiture obligations, if any, in excess of amounts accrued.

Purchase Obligations

In the normal course of business, the Company enters into various purchase commitments for goods and services. The Company maintains a number of "take-or-pay" contracts for purchases of raw materials, utilities and other services. Certain of the contracts contain a contract termination buy-out provision that allows for the Company to exit the contracts for amounts less than the remaining take-or-pay obligations. Additionally, the Company has other outstanding commitments representing maintenance and service agreements, energy and utility agreements, consulting contracts and software agreements. As of December 31, 2017, the Company had unconditional purchase obligations of $1.8 billion, which extend through 2036.

Contingencies

The Company is involved in legal and regulatory proceedings, lawsuits, claims and investigations incidental to the normal conduct of business, relating to such matters as product liability, land disputes, contracts, employment, antitrust or competition compliance, intellectual property, personal injury and other actions in tort, workers' compensation, chemical exposure, asbestos exposure, taxes, trade compliance, acquisitions and divestitures, claims of legacy stockholders, past waste disposal practices and release of chemicals into the environment. The Company is actively defending those matters where the Company is named as a defendant and, based on the current facts, does not believe the outcomes from these matters would be material to the Company's results of operations, cash flows or financial position.

European Commission

In May 2017, the Company learned that the European Commission has opened a competition law investigation involving certain subsidiaries of the Company with respect to certain ethylene purchases. The Company is cooperating with the European Commission. Because the investigation is on-going and the many uncertainties and variables involved, the Company is unable at this time to determine the outcome of this investigation and whether, and in what amount, any potential fines would be assessed.

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Supplemental Cash Flow Information

12 Months Ended

Dec. 31, 2017

Supplemental Cash Flow Information [Abstract]

Supplemental Cash Flow Information

Supplemental Cash Flow Information 

	Year Ended December 31,
	2017		2016	2015
	(In $ millions)
Interest paid, net of amounts capitalized	130		130	120
Taxes paid, net of refunds	123		129	151
Noncash Investing and Financing Activities
Accrued capital expenditures	14		1	(37	)
Asset retirement obligations	2		2	3
Capital lease obligations	—		—	6
Fair value adjustment to securities available for sale, net of tax	(1	)	—	—
Distribution to noncontrolling interests (Note 5)	—		—	(4	)

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Segment Information

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Segment Information

Segment Information

Business Segments

The Company operates through business segments according to the nature and economic characteristics of its products and customer relationships, as well as the manner in which the information is used internally by the Company's key decision maker, who is the Company's Chief Executive Officer.

The Company's business segments are as follows:

• Advanced Engineered Materials

The Company's Advanced Engineered Materials segment includes the engineered materials business and certain strategic affiliates. The engineered materials business develops, produces and supplies a broad portfolio of high performance specialty polymers for automotive and medical applications, as well as industrial products and consumer electronics. Together with its strategic affiliates, the Company's engineered materials business is a leading participant in the global specialty polymers industry. The primary products of Advanced Engineered Materials are used in a broad range of end-use products including fuel system components, automotive safety systems, medical applications, electronics, appliances, industrial products, battery separators, conveyor belts, filtration equipment, coatings, and electrical applications and products.

• Consumer Specialties

The Company's Consumer Specialties segment includes the cellulose derivatives and food ingredients businesses, which serve consumer-driven applications. These operating segments are aggregated by the Company into one reportable segment based on similar economic characteristics and similar production processes, classes of customers and selling and distribution practices. The Company's cellulose derivatives business is a leading global producer and supplier of acetate tow and acetate flake, primarily used in filter products applications. The Company's food ingredients business is a leading global supplier of acesulfame potassium for the food and beverage industry and is a leading producer of food protection ingredients, such as potassium sorbate and sorbic acid. The Company's food ingredients business produces and sells Sunett^® high intensity sweeteners.

• Industrial Specialties

The Company's Industrial Specialties segment includes the emulsion polymers and EVA polymers businesses, which are operating segments aggregated by the Company into one reportable segment based on similar products, production processes, classes of customers and selling and distribution practices as well as economic similarities over a normal business cycle. The Company's emulsion polymers business is a leading global producer of vinyl acetate-based emulsions and develops products and application technologies to improve performance, create value and drive innovation in applications such as paints and coatings, adhesives, construction, glass fiber, textiles and paper. The Company's EVA polymers business is a leading North American manufacturer of a full range of specialty ethylene vinyl acetate resins and compounds, as well as select grades of low-density polyethylene. The Company's EVA polymers' products are used in many applications, including flexible packaging films, lamination film products, hot melt adhesives, automotive parts and carpeting.

• Acetyl Intermediates

The Company's Acetyl Intermediates segment includes the intermediate chemistry business, which produces and supplies acetyl products, including acetic acid, vinyl acetate monomer, acetic anhydride and acetate esters. These products are generally used as starting materials for colorants, paints, adhesives, coatings and pharmaceuticals. The Acetyl Intermediates segment also produces organic solvents and intermediates for pharmaceutical, agricultural and chemical products.

• Other Activities

Other Activities primarily consists of corporate center costs, including administrative activities such as finance, information technology and human resource functions, interest income and expense associated with financing activities and results of the Company's captive insurance companies. Other Activities also includes the components of net periodic benefit cost (interest cost, expected return on assets and net actuarial gains and losses) for the Company's defined benefit pension plans and other postretirement plans not allocated to the Company's business segments.

The business segment management reporting and controlling systems are based on the same accounting policies as those described in the summary of significant accounting policies (Note 2).

Sales transactions between business segments are generally recorded at values that approximate third-party selling prices.

	Advanced Engineered Materials		Consumer Specialties			Industrial Specialties			Acetyl Intermediates			Other Activities		Eliminations		Consolidated
	(In $ millions)
	Year Ended December 31, 2017
Net sales	2,096		785		(1)	1,023		(2)	2,669		(3)	—		(433	)	6,140
Other (charges) gains, net (Note 18)	(2	)	(2	)		—			(52	)		(4	)	—		(60	)
Operating profit (loss)	383		218			87			424			(211	)	—		901
Equity in net earnings (loss) of affiliates	168		3			—			6			6		—		183
Depreciation and amortization	108		44			38			105			10		—		305
Capital expenditures	75		42			30			120			14		—		281		(4)
	As of December 31, 2017
Goodwill and intangible assets, net	798		258			46			202			—		—		1,304
Total assets	3,672		1,357			861			2,657			991		—		9,538
	Year Ended December 31, 2016
Net sales	1,444		929		(1)	979		(2)	2,441		(3)	—		(404	)	5,389
Other (charges) gains, net (Note 18)	(2	)	(2	)		(3	)		(3	)		(1	)	—		(11	)
Operating profit (loss)	350		302			105			340			(205	)	1		893
Equity in net earnings (loss) of affiliates	122		3			—			6			24		—		155
Depreciation and amortization	92		45			34			107			12		—		290
Capital expenditures	73		38			57			67			12		—		247		(4)
	As of December 31, 2016
Goodwill and intangible assets, net	517		244			46			183			—		—		990
Total assets	2,792		1,324			758			2,440			1,043		—		8,357
	Year Ended December 31, 2015
Net sales	1,326		969		(1)	1,082		(2)	2,744		(3)	—		(447	)	5,674
Other (charges) gains, net (Note 18)	(7	)	(25	)		(10	)		(300	)		(9	)	—		(351	)
Operating profit (loss)	235		262			72			(3	)		(240	)	—		326
Equity in net earnings (loss) of affiliates	150		2			—			6			23		—		181
Depreciation and amortization	99		60			64			123			11		—		357
Capital expenditures	73		65			56			282			7		—		483		(4)

______________________________

⁽¹⁾  Includes intersegment sales of $2 million, $0 million and $0 million for the year ended December 31, 2017, 2016 and 2015, respectively.

⁽²⁾  Includes intersegment sales of $4 million, $3 million and $0 million for the years ended December 31, 2017, 2016 and 2015, respectively.

⁽³⁾  Includes intersegment sales of $427 million, $401 million and $447 million for the years ended December 31, 2017, 2016 and 2015, respectively.

⁽⁴⁾  Includes an increase in accrued capital expenditures of $14 million, an increase of $1 million and a decrease of $37 million for the years ended December 31, 2017, 2016 and 2015, respectively.

Geographical Area Information

The net sales based on the geographic location of the Company's facilities are as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Belgium	295	408	417
Canada	92	123	162
China	833	745	800
Germany	1,776	1,540	1,779
Italy	259	13	—
Mexico	257	214	204
Singapore	867	758	703
US	1,572	1,451	1,463
Other	189	137	146
Total	6,140	5,389	5,674

Property, plant and equipment, net based on the geographic location of the Company's facilities is as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Belgium	57	55
Canada	128	132
China	363	359
Germany	979	868
Italy	51	45
Mexico	162	159
Singapore	87	90
US	1,857	1,798
Other	78	71
Total	3,762	3,577

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Earnings (Loss) Per Share

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Earnings (Loss) Per Share

Earnings (Loss) Per Share

	Year Ended December 31,
	2017		2016		2015
	(In $ millions, except share data)
Amounts attributable to Celanese Corporation
Earnings (loss) from continuing operations	856		902		306
Earnings (loss) from discontinued operations	(13	)	(2	)	(2	)
Net earnings (loss)	843		900		304
Weighted average shares - basic	137,902,667		144,939,433		150,838,050
Incremental shares attributable to equity awards(1)	414,728		728,748		1,449,905
Weighted average shares - diluted	138,317,395		145,668,181		152,287,955

______________________________

⁽¹⁾  Excludes 29, 836 and 2,903 equity award shares for the years ended December 31, 2017, 2016 and 2015, respectively, as their effect would have been antidilutive.

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Consolidating Guarantor Financial Information

12 Months Ended

Dec. 31, 2017

Consolidating Guarantor Financial Information [Abstract]

Consolidating Guarantor Financial Information

Consolidating Guarantor Financial Information

The Senior Notes were issued by Celanese US ("Issuer") and are guaranteed by Celanese Corporation ("Parent Guarantor") and the Subsidiary Guarantors (Note 14). The Issuer and Subsidiary Guarantors are 100% owned subsidiaries of the Parent Guarantor. The Parent Guarantor and Subsidiary Guarantors have guaranteed the Notes fully and unconditionally and jointly and severally.

For cash management purposes, the Company transfers cash between the Parent Guarantor, Issuer, Subsidiary Guarantors and non-guarantors through intercompany financing arrangements, contributions or declaration of dividends between the respective parent and its subsidiaries. The transfer of cash under these activities facilitates the ability of the recipient to make specified third-party payments for principal and interest on the Company's outstanding debt, Common Stock dividends and Common Stock repurchases. The consolidating statements of cash flow present such intercompany financing activities, contributions and dividends consistent with how such activity would be presented in a stand-alone statement of cash flows.

The Company has not presented separate financial information and other disclosures for each of its Subsidiary Guarantors because it believes such financial information and other disclosures would not provide investors with any additional information that would be material in evaluating the sufficiency of the guarantees.

For the year ended December 31, 2015, $54 million in interest expense was allocated from the Issuer to Subsidiary Guarantors.

The consolidating financial information for the Parent Guarantor, the Issuer, the Subsidiary Guarantors and the non-guarantors are as follows:

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF OPERATIONS

	Year Ended December 31, 2017
	Parent Guarantor	Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net sales	—	—		2,240		5,013		(1,113	)	6,140
Cost of sales	—	—		(1,717	)	(4,016	)	1,108		(4,625	)
Gross profit	—	—		523		997		(5	)	1,515
Selling, general and administrative expenses	—	—		(135	)	(321	)	—		(456	)
Amortization of intangible assets	—	—		(4	)	(16	)	—		(20	)
Research and development expenses	—	—		(31	)	(41	)	—		(72	)
Other (charges) gains, net	—	—		(7	)	(53	)	—		(60	)
Foreign exchange gain (loss), net	—	—		—		(1	)	—		(1	)
Gain (loss) on disposition of businesses and assets, net	—	—		(8	)	3		—		(5	)
Operating profit (loss)	—	—		338		568		(5	)	901
Equity in net earnings (loss) of affiliates	843	867		591		166		(2,284	)	183
Interest expense	—	(20	)	(104	)	(30	)	32		(122	)
Refinancing expense	—	—		—		—		—		—
Interest income	—	25		4		5		(32	)	2
Dividend income - cost investments	—	—		—		111		(3	)	108
Other income (expense), net	—	(3	)	2		4		—		3
Earnings (loss) from continuing operations before tax	843	869		831		824		(2,292	)	1,075
Income tax (provision) benefit	—	(26	)	(62	)	(125	)	—		(213	)
Earnings (loss) from continuing operations	843	843		769		699		(2,292	)	862
Earnings (loss) from operation of discontinued operations	—	—		(2	)	(14	)	—		(16	)
Gain (loss) on disposition of discontinued operations	—	—		—		—		—		—
Income tax (provision) benefit from discontinued operations	—	—		1		2		—		3
Earnings (loss) from discontinued operations	—	—		(1	)	(12	)	—		(13	)
Net earnings (loss)	843	843		768		687		(2,292	)	849
Net (earnings) loss attributable to noncontrolling interests	—	—		—		(6	)	—		(6	)
Net earnings (loss) attributable to Celanese Corporation	843	843		768		681		(2,292	)	843

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF OPERATIONS

	Year Ended December 31, 2016
	Parent Guarantor	Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net sales	—	—		2,162		4,322		(1,095	)	5,389
Cost of sales	—	—		(1,657	)	(3,428	)	1,101		(3,984	)
Gross profit	—	—		505		894		6		1,405
Selling, general and administrative expenses	—	—		(112	)	(304	)	—		(416	)
Amortization of intangible assets	—	—		(5	)	(4	)	—		(9	)
Research and development expenses	—	—		(32	)	(46	)	—		(78	)
Other (charges) gains, net	—	—		—		(11	)	—		(11	)
Foreign exchange gain (loss), net	—	—		—		(1	)	—		(1	)
Gain (loss) on disposition of businesses and assets, net	—	—		(8	)	17		(6	)	3
Operating profit (loss)	—	—		348		545		—		893
Equity in net earnings (loss) of affiliates	898	939		653		146		(2,481	)	155
Interest expense	—	(16	)	(94	)	(29	)	19		(120	)
Refinancing expense	—	(4	)	(2	)	—		—		(6	)
Interest income	—	12		4		5		(19	)	2
Dividend income - cost investments	—	—		—		107		1		108
Other income (expense), net	—	(1	)	1		(2	)	—		(2	)
Earnings (loss) from continuing operations before tax	898	930		910		772		(2,480	)	1,030
Income tax (provision) benefit	2	(32	)	(53	)	(36	)	(3	)	(122	)
Earnings (loss) from continuing operations	900	898		857		736		(2,483	)	908
Earnings (loss) from operation of discontinued operations	—	—		(2	)	(1	)	—		(3	)
Gain (loss) on disposition of discontinued operations	—	—		—		—		—		—
Income tax (provision) benefit from discontinued operations	—	—		—		1		—		1
Earnings (loss) from discontinued operations	—	—		(2	)	—		—		(2	)
Net earnings (loss)	900	898		855		736		(2,483	)	906
Net (earnings) loss attributable to noncontrolling interests	—	—		—		(6	)	—		(6	)
Net earnings (loss) attributable to Celanese Corporation	900	898		855		730		(2,483	)	900

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF OPERATIONS

	Year Ended December 31, 2015
	Parent Guarantor	Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net sales	—	—		2,410		4,485		(1,221	)	5,674
Cost of sales	—	—		(1,729	)	(3,897	)	1,270		(4,356	)
Gross profit	—	—		681		588		49		1,318
Selling, general and administrative expenses	—	—		(242	)	(264	)	—		(506	)
Amortization of intangible assets	—	—		(5	)	(6	)	—		(11	)
Research and development expenses	—	—		(78	)	(41	)	—		(119	)
Other (charges) gains, net	—	—		(5	)	(346	)	—		(351	)
Foreign exchange gain (loss), net	—	—		—		4		—		4
Gain (loss) on disposition of businesses and assets, net	—	—		(6	)	(3	)	—		(9	)
Operating profit (loss)	—	—		345		(68	)	49		326
Equity in net earnings (loss) of affiliates	302	314		84		162		(681	)	181
Interest expense	—	(77	)	(76	)	(36	)	70		(119	)
Refinancing expense	—	—		—		—		—		—
Interest income	—	18		40		13		(70	)	1
Dividend income - cost investments	—	—		—		107		—		107
Other income (expense), net	—	(2	)	2		(8	)	—		(8	)
Earnings (loss) from continuing operations before tax	302	253		395		170		(632	)	488
Income tax (provision) benefit	2	49		(133	)	(98	)	(21	)	(201	)
Earnings (loss) from continuing operations	304	302		262		72		(653	)	287
Earnings (loss) from operation of discontinued operations	—	—		(3	)	—		—		(3	)
Gain (loss) on disposition of discontinued operations	—	—		—		—		—		—
Income tax (provision) benefit from discontinued operations	—	—		1		—		—		1
Earnings (loss) from discontinued operations	—	—		(2	)	—		—		(2	)
Net earnings (loss)	304	302		260		72		(653	)	285
Net (earnings) loss attributable to noncontrolling interests	—	—		—		19		—		19
Net earnings (loss) attributable to Celanese Corporation	304	302		260		91		(653	)	304

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME (LOSS)

	Year Ended December 31, 2017
	Parent Guarantor		Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net earnings (loss)	843		843		768		687		(2,292	)	849
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	(1	)	(1	)	(1	)	(1	)	3		(1	)
Foreign currency translation	174		174		226		268		(668	)	174
Gain (loss) from cash flow hedges	(1	)	(1	)	(1	)	(1	)	3		(1	)
Pension and postretirement benefits	9		9		7		10		(26	)	9
Total other comprehensive income (loss), net of tax	181		181		231		276		(688	)	181
Total comprehensive income (loss), net of tax	1,024		1,024		999		963		(2,980	)	1,030
Comprehensive (income) loss attributable to noncontrolling interests	—		—		—		(6	)	—		(6	)
Comprehensive income (loss) attributable to Celanese Corporation	1,024		1,024		999		957		(2,980	)	1,024

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME (LOSS)

	Year Ended December 31, 2016
	Parent Guarantor		Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net earnings (loss)	900		898		855		736		(2,483	)	906
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	—		—		—		—		—		—
Foreign currency translation	(11	)	(11	)	(65	)	(73	)	149		(11	)
Gain (loss) from cash flow hedges	5		5		5		5		(15	)	5
Pension and postretirement benefits	(4	)	(4	)	(4	)	(2	)	10		(4	)
Total other comprehensive income (loss), net of tax	(10	)	(10	)	(64	)	(70	)	144		(10	)
Total comprehensive income (loss), net of tax	890		888		791		666		(2,339	)	896
Comprehensive (income) loss attributable to noncontrolling interests	—		—		—		(6	)	—		(6	)
Comprehensive income (loss) attributable to Celanese Corporation	890		888		791		660		(2,339	)	890

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME (LOSS)

	Year Ended December 31, 2015
	Parent Guarantor		Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net earnings (loss)	304		302		260		72		(653	)	285
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	—		—		—		—		—		—
Foreign currency translation	(188	)	(188	)	(181	)	(231	)	600		(188	)
Gain (loss) from cash flow hedges	2		2		5		1		(8	)	2
Pension and postretirement benefits	3		3		3		2		(8	)	3
Total other comprehensive income (loss), net of tax	(183	)	(183	)	(173	)	(228	)	584		(183	)
Total comprehensive income (loss), net of tax	121		119		87		(156	)	(69	)	102
Comprehensive (income) loss attributable to noncontrolling interests	—		—		—		19		—		19
Comprehensive income (loss) attributable to Celanese Corporation	121		119		87		(137	)	(69	)	121

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING BALANCE SHEET

	As of December 31, 2017
	Parent Guarantor	Issuer	Subsidiary Guarantors	Non- Guarantors	Eliminations		Consolidated
	(In $ millions)
ASSETS
Current Assets
Cash and cash equivalents	—	—	230	346	—		576
Trade receivables - third party and affiliates	—	—	89	988	(91	)	986
Non-trade receivables, net	38	482	279	385	(940	)	244
Inventories, net	—	—	277	672	(49	)	900
Marketable securities, at fair value	—	—	32	—	—		32
Other assets	—	60	12	93	(111	)	54
Total current assets	38	542	919	2,484	(1,191	)	2,792
Investments in affiliates	2,850	4,283	3,916	861	(10,934	)	976
Property, plant and equipment, net	—	—	1,145	2,617	—		3,762
Deferred income taxes	—	6	206	158	(4	)	366
Other assets	—	1,295	171	165	(1,293	)	338
Goodwill	—	—	314	689	—		1,003
Intangible assets, net	—	—	48	253	—		301
Total assets	2,888	6,126	6,719	7,227	(13,422	)	9,538
LIABILITIES AND EQUITY
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	—	76	148	369	(267	)	326
Trade payables - third party and affiliates	—	1	300	598	(92	)	807
Other liabilities	—	71	302	273	(292	)	354
Deferred income taxes	—	—	—	—	—		—
Income taxes payable	—	—	471	92	(491	)	72
Total current liabilities	—	148	1,221	1,332	(1,142	)	1,559
Noncurrent Liabilities
Long-term debt, net of unamortized deferred financing costs	—	3,128	1,254	233	(1,300	)	3,315
Deferred income taxes	—	—	—	215	(4	)	211
Uncertain tax positions	—	—	1	157	(2	)	156
Benefit obligations	—	—	277	308	—		585
Other liabilities	—	—	255	158	—		413
Total noncurrent liabilities	—	3,128	1,787	1,071	(1,306	)	4,680
Total Celanese Corporation stockholders' equity	2,888	2,850	3,711	4,412	(10,974	)	2,887
Noncontrolling interests	—	—	—	412	—		412
Total equity	2,888	2,850	3,711	4,824	(10,974	)	3,299
Total liabilities and equity	2,888	6,126	6,719	7,227	(13,422	)	9,538

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING BALANCE SHEET

	As of December 31, 2016
	Parent Guarantor	Issuer	Subsidiary Guarantors	Non- Guarantors	Eliminations		Consolidated
	(In $ millions)
ASSETS
Current Assets
Cash and cash equivalents	—	—	51	587	—		638
Trade receivables - third party and affiliates	—	—	107	819	(125	)	801
Non-trade receivables, net	40	499	249	308	(873	)	223
Inventories, net	—	—	239	526	(45	)	720
Marketable securities, at fair value	—	—	30	—	—		30
Other assets	—	42	25	76	(83	)	60
Total current assets	40	541	701	2,316	(1,126	)	2,472
Investments in affiliates	2,548	4,029	3,655	752	(10,132	)	852
Property, plant and equipment, net	—	—	1,049	2,528	—		3,577
Deferred income taxes	—	—	91	86	(18	)	159
Other assets	—	705	133	156	(687	)	307
Goodwill	—	—	314	482	—		796
Intangible assets, net	—	—	48	146	—		194
Total assets	2,588	5,275	5,991	6,466	(11,963	)	8,357
LIABILITIES AND EQUITY
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	—	6	133	250	(271	)	118
Trade payables - third party and affiliates	—	—	226	524	(125	)	625
Other liabilities	—	58	167	262	(165	)	322
Deferred income taxes	—	—	—	—	—		—
Income taxes payable	—	—	454	75	(517	)	12
Total current liabilities	—	64	980	1,111	(1,078	)	1,077
Noncurrent Liabilities
Long-term debt, net of unamortized deferred financing costs	—	2,647	727	210	(694	)	2,890
Deferred income taxes	—	16	—	132	(18	)	130
Uncertain tax positions	—	—	3	130	(2	)	131
Benefit obligations	—	—	636	257	—		893
Other liabilities	—	—	74	142	(1	)	215
Total noncurrent liabilities	—	2,663	1,440	871	(715	)	4,259
Total Celanese Corporation stockholders' equity	2,588	2,548	3,571	4,051	(10,170	)	2,588
Noncontrolling interests	—	—	—	433	—		433
Total equity	2,588	2,548	3,571	4,484	(10,170	)	3,021
Total liabilities and equity	2,588	5,275	5,991	6,466	(11,963	)	8,357

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF CASH FLOWS

	Year Ended December 31, 2017
	Parent Guarantor		Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net cash provided by (used in) operating activities	740		868		425		593		(1,823	)	803
Investing Activities
Capital expenditures on property, plant and equipment	—		—		(176	)	(91	)	—		(267	)
Acquisitions, net of cash acquired	—		(11	)	(12	)	(274	)	28		(269	)
Proceeds from sale of businesses and assets, net	—		—		9		20		(28	)	1
Capital expenditures related to Fairway Methanol LLC	—		—		—		—		—		—
Return of capital from subsidiary	—		16		241		—		(257	)	—
Contributions to subsidiary	—		—		—		—		—		—
Intercompany loan receipts (disbursements)	—		(530	)	(25	)	—		555		—
Other, net	—		—		(2	)	(12	)	—		(14	)
Net cash provided by (used in) investing activities	—		(525	)	35		(357	)	298		(549	)
Financing Activities
Short-term borrowings (repayments), net	—		56		15		51		(11	)	111
Proceeds from short-term borrowings	—		—		—		182		—		182
Repayments of short-term borrowings	—		—		—		(124	)	—		(124	)
Proceeds from long-term debt	—		351		530		14		(544	)	351
Repayments of long-term debt	—		(6	)	(2	)	(69	)	—		(77	)
Purchases of treasury stock, including related fees	(500	)	—		—		—		—		(500	)
Dividends to parent	—		(741	)	(802	)	(280	)	1,823		—
Contributions from parent	—		—		—		—		—		—
Stock option exercises	1		—		—		—		—		1
Series A common stock dividends	(241	)	—		—		—		—		(241	)
Return of capital to parent	—		—		—		(257	)	257		—
(Distributions to) contributions from noncontrolling interests	—		—		—		(27	)	—		(27	)
Other, net	—		(3	)	(22	)	(2	)	—		(27	)
Net cash provided by (used in) financing activities	(740	)	(343	)	(281	)	(512	)	1,525		(351	)
Exchange rate effects on cash and cash equivalents	—		—		—		35		—		35
Net increase (decrease) in cash and cash equivalents	—		—		179		(241	)	—		(62	)
Cash and cash equivalents as of beginning of period	—		—		51		587		—		638
Cash and cash equivalents as of end of period	—		—		230		346		—		576

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF CASH FLOWS

	Year Ended December 31, 2016
	Parent Guarantor		Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net cash provided by (used in) operating activities	695		711		(21	)	872		(1,364	)	893
Investing Activities
Capital expenditures on property, plant and equipment	—		—		(139	)	(107	)	—		(246	)
Acquisitions, net of cash acquired	—		—		—		(178	)	—		(178	)
Proceeds from sale of businesses and assets, net	—		—		1		11		—		12
Capital expenditures related to Fairway Methanol LLC	—		—		—		—		—		—
Return of capital from subsidiary	—		145		758		—		(903	)	—
Contributions to subsidiary	—		—		—		—		—		—
Intercompany loan receipts (disbursements)	—		(283	)	19		90		174		—
Other, net	—		—		(10	)	(17	)	—		(27	)
Net cash provided by (used in) investing activities	—		(138	)	629		(201	)	(729	)	(439	)
Financing Activities
Short-term borrowings (repayments), net	—		(371	)	1		(1	)	19		(352	)
Proceeds from short-term borrowings	—		—		—		53		—		53
Repayments of short-term borrowings	—		—		—		(90	)	—		(90	)
Proceeds from long-term debt	—		1,589		746		—		(826	)	1,509
Repayments of long-term debt	—		(1,083	)	(635	)	(42	)	633		(1,127	)
Purchases of treasury stock, including related fees	(500	)	—		—		—		—		(500	)
Dividends to parent	—		(695	)	(669	)	—		1,364		—
Contributions from parent	—		—		—		—		—		—
Stock option exercises	6		—		—		—		—		6
Series A common stock dividends	(201	)	—		—		—		—		(201	)
Return of capital to parent	—		—		—		(903	)	903		—
(Distributions to) contributions from noncontrolling interests	—		—		—		(24	)	—		(24	)
Other, net	—		(13	)	(21	)	1		—		(33	)
Net cash provided by (used in) financing activities	(695	)	(573	)	(578	)	(1,006	)	2,093		(759	)
Exchange rate effects on cash and cash equivalents	—		—		—		(24	)	—		(24	)
Net increase (decrease) in cash and cash equivalents	—		—		30		(359	)	—		(329	)
Cash and cash equivalents as of beginning of period	—		—		21		946		—		967
Cash and cash equivalents as of end of period	—		—		51		587		—		638

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF CASH FLOWS

	Year Ended December 31, 2015
	Parent Guarantor		Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net cash provided by (used in) operating activities	591		536		529		422		(1,216	)	862
Investing Activities
Capital expenditures on property, plant and equipment	—		—		(128	)	(104	)	—		(232	)
Acquisitions, net of cash acquired	—		—		(3	)	(3	)	—		(6	)
Proceeds from sale of businesses and assets, net	—		—		—		4		—		4
Capital expenditures related to Fairway Methanol LLC	—		—		(20	)	(268	)	—		(288	)
Return of capital from subsidiary	—		—		—		—		—		—
Contributions to subsidiary	—		—		(120	)	—		120		—
Intercompany loan receipts (disbursements)	—		(333	)	(33	)	(15	)	381		—
Other, net	—		—		(12	)	(24	)	—		(36	)
Net cash provided by (used in) investing activities	—		(333	)	(316	)	(410	)	501		(558	)
Financing Activities
Short-term borrowings (repayments), net	—		383		—		—		(33	)	350
Proceeds from short-term borrowings	—		—		—		80		—		80
Repayments of short-term borrowings	—		—		—		(83	)	—		(83	)
Proceeds from long-term debt	—		15		406		—		(421	)	—
Repayments of long-term debt	—		(9	)	(74	)	(14	)	73		(24	)
Purchases of treasury stock, including related fees	(420	)	—		—		—		—		(420	)
Dividends to parent	—		(592	)	(624	)	—		1,216		—
Contributions from parent	—		—		—		120		(120	)	—
Stock option exercises	3		—		—		—		—		3
Series A common stock dividends	(174	)	—		—		—		—		(174	)
Return of capital to parent	—		—		—		—		—		—
(Distributions to) contributions from noncontrolling interests	—		—		—		214		—		214
Other, net	—		—		(10	)	(2	)	—		(12	)
Net cash provided by (used in) financing activities	(591	)	(203	)	(302	)	315		715		(66	)
Exchange rate effects on cash and cash equivalents	—		—		—		(51	)	—		(51	)
Net increase (decrease) in cash and cash equivalents	—		—		(89	)	276		—		187
Cash and cash equivalents as of beginning of period	—		—		110		670		—		780
Cash and cash equivalents as of end of period	—		—		21		946		—		967

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Subsequent Events

12 Months Ended

Dec. 31, 2017

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

On February 1, 2018, using $158 million of cash on hand and borrowings under the Company's senior unsecured revolving credit facility, the Company completed the acquisition of 100% of the ownership interests of Omni Plastics, L.L.C. and its subsidiaries ("Omni Plastics"). Omni Plastics specializes in custom compounding of various engineered thermoplastic materials. The acquisition further strengthens the Company's global asset base by adding compounding capacity in the Americas. The acquisition will be accounted for as a business combination, and the acquired operations will be included in the Advanced Engineered Materials segment beginning in the first quarter of 2018. The Company has not presented a purchase price allocation related to the fair values of assets acquired and liabilities assumed because the initial accounting for the acquisition was incomplete as of the issuance date of the financial statements. The acquisition is not expected to be material to the Company's 2018 financial position or results of operations.

Subsequent to December 31, 2017, the Company settled its dispute concerning the exercise of an option right by a partner in two of the Company's InfraServ affiliate investments. As a result of the settlement, effective upon processing by the commercial register (estimated February 2018), the Company’s share of ownership in InfraServ GmbH & Co. Gendorf KG will be reduced from 39% to 30% and in Infraserv GmbH & Co. Knapsack KG from 27% to 22%. The shares will be transferred against net payment of approximately €4 million, after taking into account dividends received by the Company since option exercise.

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Summary of Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Purchase Accounting

Purchase Accounting

The Company recognizes the identifiable tangible and intangible assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date. The excess of purchase price over the aggregate fair values is recorded as goodwill. Intangible assets are valued using the relief from royalty, multi-period excess earnings and discounted cash flow methodologies, which are considered Level 3 measurements. The relief from royalty method estimates the Company's theoretical royalty savings from ownership of the intangible asset. Key assumptions used in this method include discount rates, royalty rates, growth rates, sales projections and terminal value rates. Key assumptions used in the multi-period excess earnings method include discount rates, retention rates, growth rates, sales projections, expense projections and contributory asset charges. Key assumptions used in the discounted cash flow valuation model include discount rates, growth rates, tax rates, cash flow projections and terminal value rates. All of these methodologies require significant management judgment and, therefore, are susceptible to change. The Company calculates the fair value of the identifiable tangible and intangible assets acquired and liabilities assumed to allocate the purchase price at the acquisition date. The Company may use the assistance of third-party valuation consultants.

Asset impairments goodwill and other intangible assets

Recoverability of Goodwill and Indefinite-Lived Assets

The Company assesses the recoverability of the carrying amount of its reporting unit goodwill and indefinite-lived intangible assets either qualitatively or quantitatively annually during the third quarter of its fiscal year using June 30 balances or whenever events or changes in circumstances indicate that the carrying amount of the asset may not be fully recoverable. The Company assesses the recoverability of finite-lived intangible assets in the same manner as for property, plant and equipment. Impairment losses are generally recorded in Other (charges) gains, net in the consolidated statements of operations.

Recoverability of the carrying amount of goodwill is measured at the reporting unit level. In performing a quantitative analysis, the Company measures the recoverability of goodwill for each reporting unit using a discounted cash flow model incorporating discount rates commensurate with the risks involved, which is classified as a Level 3 fair value measurement. The key assumptions used in the discounted cash flow valuation model include discount rates, growth rates, tax rates, cash flow projections and terminal value rates. Discount rates, growth rates and cash flow projections are the most sensitive and susceptible to change as they require significant management judgment. Discount rates used are similar to the rates estimated by the weighted average cost of capital ("WACC") considering any differences in company-specific risk factors. The Company may engage third-party valuation consultants to assist with this process.

Management tests indefinite-lived intangible assets for impairment quantitatively utilizing the relief from royalty method under the income approach to determine the estimated fair value for each indefinite-lived intangible asset, which is classified as a Level 3 fair value measurement. The relief from royalty method estimates the Company's theoretical royalty savings from ownership of the intangible asset. The key assumptions used in this model include discount rates, royalty rates, growth rates, tax rates, sales projections and terminal value rates. Discount rates, royalty rates, growth rates and sales projections are the assumptions most sensitive and susceptible to change as they require significant management judgment. Discount rates used are similar to the rates estimated by the WACC considering any differences in company-specific risk factors. Royalty rates are established by management and are periodically substantiated by third-party valuation consultants.

Asset Retirement Obligations

Asset Retirement Obligations

Periodically, the Company will conclude a site no longer has an indeterminate life based on long-lived asset impairment triggering events and decisions made by the Company. Accordingly, the Company will record asset retirement obligations associated with such sites. To measure the fair value of the asset retirement obligations, the Company will use the expected present value technique, which is classified as a Level 3 fair value measurement. The expected present value technique uses a set of cash flows that represent the probability-weighted average of all possible cash flows based on the Company's judgment. The Company uses the following inputs to determine the fair value of the asset retirement obligations based on the Company's experience with fulfilling obligations of this type and the Company's knowledge of market conditions: (a) labor costs; (b) allocation of overhead costs; (c) profit on labor and overhead costs; (d) effect of inflation on estimated costs and profits; (e) risk premium for bearing the uncertainty inherent in cash flows, other than inflation; (f) time value of money represented by the risk-free interest rate commensurate with the timing of the associated cash flows; and (g) nonperformance risk relating to the liability, which includes the Company's own credit risk. The asset retirement obligations are accreted to their undiscounted values until the time at which they are expected to be settled.

The Company has identified but not recognized asset retirement obligations related to certain of its existing operating facilities. Examples of these types of obligations include demolition, decommissioning, disposal and restoration activities. Legal obligations exist in connection with the retirement of these assets upon closure of the facilities or abandonment of the existing operations. However, the Company currently plans on continuing operations at these facilities indefinitely and therefore, a reasonable estimate of fair value cannot be determined at this time. In the event the Company considers plans to abandon or cease operations at these sites, an asset retirement obligation will be reassessed at that time. If certain operating facilities were to close, the related asset retirement obligations could significantly affect the Company's results of operations and cash flows.

Environmental liabilities

Environmental Liabilities

The Company manufactures and sells a diverse line of chemical products throughout the world. Accordingly, the Company's operations are subject to various hazards incidental to the production of industrial chemicals including the use, handling, processing, storage and transportation of hazardous materials. The Company recognizes losses and accrues liabilities relating to environmental matters if available information indicates that it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. Depending on the nature of the site, the Company accrues through 15 years, unless the Company has government orders or other agreements that extend beyond 15 years. The Company estimates environmental liabilities on a case-by-case basis using the most current status of available facts, existing technology, presently enacted laws and regulations and prior experience in remediation of contaminated sites. Recoveries of environmental costs from other parties are recorded as assets when their receipt is deemed probable.

An environmental reserve related to cleanup of a contaminated site might include, for example, a provision for one or more of the following types of costs: site investigation and testing costs, cleanup costs, costs related to soil and water contamination resulting from tank ruptures and post-remediation monitoring costs. These undiscounted reserves do not take into account any claims or recoveries from insurance. The measurement of environmental liabilities is based on the Company's periodic estimate of what it will cost to perform each of the elements of the remediation effort. The Company utilizes third parties to assist in the management and development of cost estimates for its sites. Changes to environmental regulations or other factors affecting environmental liabilities are reflected in the consolidated financial statements in the period in which they occur.

Pension and other postretirement obligations

Pension and Other Postretirement Obligations

The Company recognizes a balance sheet asset or liability for each of its pension and other postretirement benefit plans equal to the plan's funded status as of a December 31 measurement date. The amounts recognized in the consolidated financial statements related to pension and other postretirement benefits are determined on an actuarial basis. Various assumptions are used in the calculation of the actuarial valuation of the employee benefit plans. These assumptions include the discount rate, compensation levels, expected long-term rates of return on plan assets and trends in health care costs. In addition, actuarial consultants use factors such as withdrawal and mortality rates to estimate the projected benefit obligation.

The Company applies the long-term expected rate of return to the fair value of plan assets and immediately recognizes in operating results the change in fair value of plan assets and net actuarial gains and losses annually in the fourth quarter of each fiscal year and whenever a plan is required to be remeasured. Events requiring a plan remeasurement will be recognized in the quarter in which such remeasurement event occurs. The remaining components of pension and other postretirement plan net periodic benefit costs are recorded on a quarterly basis.

The Company allocates the service cost and amortization of prior service cost (or credit) components of its pension and postretirement plans to its business segments. Interest cost, expected return on assets and net actuarial gains and losses are considered financing activities managed at the corporate level and are recorded to Other Activities. The Company believes the expense allocation appropriately matches the cost incurred for active employees to the respective business segment.

Other postretirement benefit plans provide medical and life insurance benefits to retirees who meet minimum age and service requirements. The key determinants of the accumulated postretirement benefit obligation ("APBO") are the discount rate and the health care cost trend rate.

• Discount Rate

As of the measurement date, the Company determines the appropriate discount rate used to calculate the present value of future cash flows currently expected to be required to settle the pension and other postretirement benefit obligations. The discount rate is generally based on the yield on high-quality corporate fixed-income securities.

In the US, the rate used to discount pension and other postretirement benefit plan liabilities is based on a yield curve developed from market data of over 300 Aa-grade non-callable bonds at the measurement date. This yield curve has discount rates that vary based on the duration of the obligations. The estimated future cash flows for the pension and other benefit obligations were matched to the corresponding rates on the yield curve to derive a weighted average discount rate.

The Company determines its discount rates in the Euro zone using the iBoxx Euro Corporate AA Bond indices with appropriate adjustments for the duration of the plan obligations. In other international locations, the Company determines its discount rates based on the yields of high quality government bonds with a duration appropriate to the duration of the plan obligations.

• Change in estimate regarding pension and other postretirement benefits

Beginning in 2016, the Company elected to change the method used to estimate the service and interest cost components of net periodic benefit cost for its significant defined benefit pension plans and other postretirement benefit plans. Previously, the Company estimated the service and interest cost components utilizing a single weighted average discount rate derived from the yield curve used to measure the benefit obligation at the beginning of the period. The Company elected to use a full yield curve approach in the estimation of these components of net periodic benefit cost by applying the specific spot rates along the yield curve used in the determination of the benefit obligation to the relevant projected cash flows. This change improves the correlation between projected benefit cash flows and the corresponding yield curve spot rates and provides a more precise measurement of service and interest costs. This change did not affect the measurement of the Company's total benefit obligations as the change in service and interest cost was completely offset in the annual actuarial (gain) loss reported. The Company accounted for this change prospectively as a change in estimate beginning in 2016.

• Expected Long-Term Rate of Return on Assets

The Company determines the long-term expected rate of return on plan assets by considering the current target asset allocation, as well as the historical and expected rates of return on various asset categories in which the plans are invested. A single long-term expected rate of return on plan assets is then calculated for each plan as the weighted average of the target asset allocation and the long-term expected rate of return assumptions for each asset category within each plan.

The expected rate of return is assessed annually and is based on long-term relationships among major asset classes and the level of incremental returns that can be earned by the successful implementation of different active investment management strategies. Equity returns are based on estimates of long-term inflation rate, real rate of return, 10-year Treasury bond premium over cash and historical equity risk premium. Fixed income returns are based on maturity, historical long-term inflation, real rate of return and credit spreads.

• Investment Policies and Strategies

The investment objectives for the Company's pension plans are to earn, over a moving twenty-year period, a long-term expected rate of return, net of investment fees and transaction costs, sufficient to satisfy the benefit obligations of the plan, while at the same time maintaining adequate liquidity to pay benefit obligations and proper expenses, and meet any other cash needs, in the short- to medium-term.

The equity and debt securities objectives are to provide diversified exposure across the US and global equity markets and to manage the risks and returns of the plans through the use of multiple managers and strategies. The fixed income strategy is designed to reduce liability-related interest rate risk by investing in bonds that match the duration and credit quality of the plan liabilities. Derivatives-based strategies may be used to mitigate investment risks.

The financial objectives of the qualified pension plans are established in conjunction with a comprehensive review of each plan's liability structure. The Company's asset allocation policy is based on detailed asset/liability analysis. In developing investment policy and financial goals, consideration is given to each plan's demographics, the returns and risks associated with current and alternative investment strategies and the current and projected cash, expense and funding ratios of each plan. Investment policies must also comply with local statutory requirements as determined by each country. A formal asset/liability study of each plan is undertaken every three to five years or whenever there has been a material change in plan demographics, benefit structure or funding status and investment market. The Company has adopted a long-term investment horizon such that the risk and duration of investment losses are weighed against the long-term potential for appreciation of assets. Although there cannot be complete assurance that these objectives will be realized, it is believed that the likelihood for their realization is reasonably high, based upon the asset allocation chosen and the historical and expected performance of the asset classes utilized by the plans. The intent is for investments to be broadly diversified across asset classes, investment styles, market sectors, investment managers, developed and emerging markets and securities in order to moderate portfolio volatility and risk. Investments may be in separate accounts, commingled trusts, mutual funds and other pooled asset portfolios provided they all conform to fiduciary standards.

External investment managers are hired to manage pension assets. Investment consultants assist with the screening process for each new manager hired. Over the long-term, the investment portfolio is expected to earn returns that exceed a composite of market indices that are weighted to match each plan's target asset allocation. The portfolio return should also (over the long-term) meet or exceed the return used for actuarial calculations in order to meet the future needs of each plan.

Commitments and contingencies

Commitments and Contingencies

Due to the inherent subjectivity of assessments and unpredictability of outcomes of legal proceedings, the Company's litigation accruals and estimates of possible loss or range of possible loss ("Possible Loss") may not represent the ultimate loss to the Company from legal proceedings. For reasonably possible loss contingencies that may be material, the Company estimates its Possible Loss when determinable, considering that the Company could incur no loss in certain matters.

For some matters, the Company is unable, at this time, to estimate its Possible Loss that is reasonably possible of occurring. Generally, the less progress that has been made in the proceedings or the broader the range of potential results, the more difficult it is for the Company to estimate the Possible Loss that is reasonably possible the Company could incur. The Company may disclose certain information related to a plaintiff's claim against the Company alleged in the plaintiff's pleadings or otherwise publicly available. While information of this type may provide insight into the potential magnitude of a matter, it does not necessarily represent the Company's estimate of reasonably possible or probable loss. Some of the Company's exposure in legal matters may be offset by applicable insurance coverage. The Company does not consider the possible availability of insurance coverage in determining the amounts of any accruals or any estimates of Possible Loss. Thus, the Company's exposure and ultimate losses may be higher or lower, and possibly materially so, than the Company's litigation accruals and estimates of Possible Loss.

Income taxes

Income Taxes

The provision for income taxes is determined using the asset and liability approach of accounting for income taxes. Under this approach, deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes and net operating loss and tax credit carryforwards. The amount of deferred taxes on these temporary differences is determined using the tax rates that are expected to apply to the period when the asset is realized or the liability is settled, as applicable, based on tax rates and laws in the respective tax jurisdiction enacted as of the balance sheet date.

The Company reviews its deferred tax assets for recoverability and establishes a valuation allowance based on historical taxable income, projected future taxable income, applicable tax strategies and the expected timing of the reversals of existing temporary differences. A valuation allowance is provided when it is more likely than not (likelihood of greater than 50%) that some portion or all of the deferred tax assets will not be realized.

The Company considers many factors when evaluating and estimating its tax positions and tax benefits, which may require periodic adjustments and which may not accurately anticipate actual outcomes. Tax positions are recognized only when it is more likely than not (likelihood of greater than 50%), based on technical merits, that the positions will be sustained upon examination. Tax positions that meet the more-likely-than-not threshold are measured using a probability weighted approach as the largest amount of tax benefit that is greater than 50% likely of being realized upon settlement. Whether the more-likely-than-not recognition threshold is met for a tax position is a matter of judgment based on the individual facts and circumstances of that position evaluated in light of all available evidence.

The Company recognizes interest and penalties related to uncertain tax positions in Income tax (provision) benefit in the consolidated statements of operations.

Consolidation principles

Consolidation Principles

The consolidated financial statements have been prepared in accordance with US GAAP for all periods presented and include the accounts of the Company and its majority owned subsidiaries over which the Company exercises control. All intercompany accounts and transactions have been eliminated in consolidation.

Estimates and assumptions

Estimates and Assumptions

The preparation of consolidated financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of net sales, expenses and allocated charges during the reporting period. Significant estimates pertain to impairments of goodwill, intangible assets and other long-lived assets, purchase price allocations, restructuring costs and other (charges) gains, net, income taxes, pension and other postretirement benefits, asset retirement obligations, environmental liabilities and loss contingencies, among others. Actual results could differ from those estimates.

Fair Value Measurement

Fair Value Measurements

The Company determines fair value based on the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities required to be recorded at fair value, the Company considers assumptions that market participants would use when pricing the asset or liability. Market participant assumptions are categorized by a three-tiered fair value hierarchy which prioritizes the inputs used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurement) and the lowest priority to unobservable inputs (Level 3 measurement). This hierarchy requires entities to maximize the use of observable inputs and minimize the use of unobservable inputs. If a financial instrument uses inputs that fall in different levels of the hierarchy, the instrument will be categorized based upon the lowest level of input that is significant to the fair value calculation. Valuations for fund investments, such as common/collective trusts, registered investment companies and short-term investment funds, which do not have readily determinable fair values, are typically estimated using a net asset value provided by a third party as a practical expedient.

The levels of inputs used to measure fair value are as follows:

Level 1 - unadjusted quoted prices for identical assets or liabilities in active markets accessible by the Company

Level 2 - inputs that are observable in the marketplace other than those inputs classified as Level 1

Level 3 - inputs that are unobservable in the marketplace and significant to the valuation

Cash and Cash Equivalents

Cash and Cash Equivalents

All highly liquid investments with original maturities of three months or less are considered cash equivalents.

Allowance for doubtful accounts

Allowance for Doubtful Accounts

The Company maintains allowances for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments. The Company believes, based on historical results, the likelihood of actual write-offs having a material impact on financial results is low. The allowance for doubtful accounts is estimated using factors such as customer credit ratings, past collection history and general risk profile. Receivables are charged against the allowance for doubtful accounts when it is probable that the receivable will not be recovered.

Inventories

Inventories

Inventories, including stores and supplies, are stated at the lower of cost and net realizable value. Cost for inventories is determined using the first-in, first-out ("FIFO") method. Cost includes raw materials, direct labor and manufacturing overhead. Cost for stores and supplies is primarily determined by the average cost method.

Investments in marketable securities

Investments

• Marketable Securities

The cost of available-for-sale securities sold is determined using the specific identification method.

Investments in affiliates

Investments in Affiliates

Investments where the Company can exercise significant influence over operating and financial policies of an investee, which is generally considered when an investor owns 20% or more of the voting stock of an investee, are accounted for under the equity method of accounting. Investments where the Company does not exercise significant influence are accounted for under the cost method of accounting. The Company determined it cannot exercise significant influence over certain investments where the Company owns greater than a 20% interest due to local government investment in and influence over these entities, limitations on the Company's involvement in the day-to-day operations and the present inability of the entities to provide timely financial information prepared in accordance with US GAAP. Accordingly, these investments are accounted for under the cost method of accounting.

In certain instances, the financial information of the Company's equity investees is not available on a timely basis. Accordingly, the Company records its proportional share of the investee's earnings or losses on a consistent lag of no more than one quarter.

When required to assess the recoverability of its investments in affiliates, the Company estimates fair value using a discounted cash flow model. The Company may engage third-party valuation consultants to assist with this process.

Property, plant and equipment, net

Property, Plant and Equipment, Net

Land is recorded at historical cost. Buildings, machinery and equipment, including capitalized interest, and property under capital lease agreements, are recorded at cost less accumulated depreciation. The Company records depreciation and amortization in its consolidated statements of operations as either Cost of sales, Selling, general and administrative expenses or Research and development expenses consistent with the utilization of the underlying assets. Depreciation is calculated on a straight-line basis over the following estimated useful lives of depreciable assets:

Land improvements	20 years
Buildings and improvements	30 years
Machinery and equipment	20 years

Leasehold improvements are amortized over 10 years or the remaining life of the respective lease, whichever is shorter.

Accelerated depreciation is recorded when the estimated useful life is shortened. Ordinary repair and maintenance costs, including costs for planned maintenance turnarounds, that do not extend the useful life of the asset are charged to earnings as incurred. Fully depreciated assets are retained in property and depreciation accounts until sold or otherwise disposed. In the case of disposals, assets and related depreciation are removed from the accounts, and the net amounts, less proceeds from disposal, are included in earnings.

The Company assesses the recoverability of the carrying amount of its property, plant and equipment whenever events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be recoverable. An impairment loss would be assessed when estimated undiscounted future cash flows from the operation and disposition of the asset group are less than the carrying amount of the asset group. Asset groups have identifiable cash flows and are largely independent of other asset groups. Measurement of an impairment loss is based on the excess of the carrying amount of the asset group over its fair value. The Company calculates the fair value using a discounted cash flow model incorporating discount rates commensurate with the risks involved for the asset group, which is classified as a Level 3 fair value measurement. The key assumptions used in the discounted cash flow valuation model include discount rates, growth rates, tax rates, cash flow projections and terminal value rates. Discount rates, growth rates and cash flow projections involve significant judgment and are based on management's estimate of current and forecasted market conditions and cost structure. Impairment losses are generally recorded in Other (charges) gains, net in the consolidated statements of operations.

Intangible Assets, Finite-Lived, Policy [Policy Text Block]

Definite-lived Intangible Assets

Customer-related intangible assets and other intangible assets with finite lives are amortized on a straight-line basis over their estimated useful lives, which range from three to 30 years.

Derivative and hedging instruments

Derivative and Hedging Instruments

The Company manages its exposures to interest rates, foreign exchange rates and commodity prices through a risk management program that includes the use of derivative financial instruments. The Company does not use derivative financial instruments for speculative trading purposes. The fair value of derivative instruments other than foreign currency forwards and swaps is recorded as an asset or liability on a net basis at the balance sheet date.

• Foreign Exchange Risk Management

Certain subsidiaries of the Company have assets and liabilities denominated in currencies other than their respective functional currencies, which creates foreign exchange risk. The Company also is exposed to foreign currency fluctuations on transactions with third-party entities as well as intercompany transactions. The Company minimizes its exposure to foreign currency fluctuations by entering into foreign currency forwards and swaps. These foreign currency forwards and swaps are not designated as hedges. Gains and losses on foreign currency forwards and swaps entered into to offset foreign exchange impacts on intercompany balances are included in Other income (expense), net in the consolidated statements of operations. Gains and losses on foreign currency forwards and swaps entered into to offset foreign exchange impacts on all other assets and liabilities are included in Foreign exchange gain (loss), net in the consolidated statements of operations.

The Company uses non-derivative financial instruments that may give rise to foreign currency transaction gains or losses to hedge the foreign currency exposure of net investments in foreign operations. Accordingly, the effective portion of gains and losses from remeasurement of the non-derivative financial instrument is included in foreign currency translation within Accumulated other comprehensive income (loss), net in the consolidated balance sheets. Gains and losses are reclassified to earnings in the period the hedged investment is sold or liquidated.

• Commodity Risk Management

The Company has exposure to the prices of commodities in its procurement of certain raw materials. The Company manages its exposure to commodity risk primarily through the use of long-term supply agreements, multi-year purchasing and sales agreements and forward purchase contracts. The Company regularly assesses its practice of using forward purchase contracts and other raw material hedging instruments in accordance with changes in economic conditions. Forward purchases and swap contracts for raw materials are principally settled through physical delivery of the commodity. For qualifying contracts, the Company has elected to apply the normal purchases and normal sales exception based on the probability at the inception and throughout the term of the contract that the Company would not net settle and the transaction would result in the physical delivery of the commodity. Accordingly, realized gains and losses on these contracts are included in the cost of the commodity upon the settlement of the contract.

The Company also uses commodity swaps to hedge the risk of fluctuating price changes in certain raw materials and in which physical settlement does not occur. These commodity swaps fix the variable fee component of the price of certain commodities. All or a portion of these commodity swap agreements may be designated as cash flow hedges. Accordingly, to the extent the cash flow hedge was effective, changes in the fair value of commodity swaps are included in gain (loss) from cash flow hedges within Accumulated other comprehensive income (loss), net in the consolidated balance sheets. Gains and losses are reclassified to earnings in the period that the hedged item affected earnings.

Insurance loss reserves

The Company also uses commodity swaps to hedge the risk of fluctuating price changes in certain raw materials and in which physical settlement does not occur. These commodity swaps fix the variable fee component of the price of certain commodities. All or a portion of these commodity swap agreements may be designated as cash flow hedges. Accordingly, to the extent the cash flow hedge was effective, changes in the fair value of commodity swaps are included in gain (loss) from cash flow hedges within Accumulated other comprehensive income (loss), net in the consolidated balance sheets. Gains and losses are reclassified to earnings in the period that the hedged item affected earnings.

Insurance Loss Reserves

The Company has two wholly-owned insurance companies (the "Captives") that are used as a form of self-insurance for liability and workers compensation risks. Capitalization of the Captives is determined by regulatory guidelines. Premiums written are recognized as revenue based on policy periods. One of the Captives also insures certain third-party risks. The Captives use reinsurance arrangements to reduce their risks, however these arrangements do not relieve the Captives from their obligations to policyholders. The financial condition of the Captives' reinsurers are monitored to minimize exposure to insolvencies. However, failure of the reinsurers to honor their obligations could result in losses to the Captives.

Claim reserves are established when sufficient information is available to indicate a specific policy is involved and the Company can reasonably estimate its liability. These reserves are based on management estimates and periodic actuarial valuations. In addition, reserves have been established to cover exposures for both known and unreported claims. Estimates of these liabilities are reviewed and updated regularly, however it is possible that actual results could differ significantly from the recorded liabilities.

Deferred Financing Costs

Deferred Financing Costs

Deferred financing costs are amortized using a method that approximates the effective interest rate method over the term of the related debt into Interest expense in the consolidated statements of operations. Upon the extinguishment of the related debt, any unamortized deferred financing costs are immediately expensed and included in Refinancing expense in the consolidated statements of operations. Upon the modification of the related debt, a portion of unamortized deferred financing costs may be immediately expensed and included in Refinancing expense in the consolidated statements of operations. Direct costs of refinancing activities are immediately expensed and included in Refinancing expense in the consolidated statements of operations.

Revenue recognition

Revenue Recognition

The Company recognizes revenue when title and risk of loss have been transferred to the customer, generally at the time of shipment of products, and provided that four basic criteria are met: (a) persuasive evidence of an arrangement exists; (b) delivery has occurred or services have been rendered; (c) the fee is fixed or determinable; and (d) collectibility is reasonably assured. Shipping and handling fees billed to customers in a sales transaction are recorded in Net sales and shipping and handling costs incurred are recorded in Cost of sales.

Research and development

Research and Development

The costs of research and development are charged as an expense in the period in which they are incurred.

Management compensation plans

Management Compensation Plans

Share-based compensation expense is measured at the grant date, based on the fair value of the award, and is recognized over the participant's requisite service period. Upon termination of a participant's employment with the Company by reason of death or disability, retirement or by the Company without cause (as defined in the respective award agreements), a prorated award will generally vest on the original vesting date. The prorated award is calculated based on the time lapsed between the grant date and the date of termination, reduced by awards previously vested. Upon the termination of a Participant's employment with the Company for any other reason, any unvested portion of the award shall be forfeited and canceled without consideration.

• Restricted Stock Units ("RSUs")

Performance-based RSUs. The Company generally grants performance-based RSUs to the Company's executive officers and certain employees annually in February. The Company may also grant performance-based RSUs to certain new employees or to employees who assume positions of increasing responsibility at the time those events occur. The fair value of the Company's performance-based RSUs with a performance condition is equal to the average of the high and low price of the Company's Series A common stock, par value $0.0001 per share ("Common Stock"), on the grant date less the present value of the expected dividends not received during the vesting period. Outstanding performance-based RSUs granted prior to 2016 generally vest in two equal tranches with the final tranche vesting three years from the grant date. Outstanding performance-based RSUs granted in 2016 and thereafter generally cliff-vest three years from the date of grant. Compensation expense for performance-based RSUs granted prior to 2016 is recognized over the vesting period of the respective grant based on the accelerated attribution method, and compensation expense for performance-based RSUs granted in 2016 and thereafter is recognized over the vesting period of the respective grant on a straight-line basis. Historically, the Company recognized share-based compensation net of estimated forfeitures over the vesting period of the respective grant. Effective January 1, 2017, the Company elected to change its accounting policy to recognize forfeitures as they occur. The new forfeiture policy election was adopted using a modified retrospective approach with a cumulative effect adjustment of $1 million to Retained earnings as of January 1, 2017. See Note 3 for further information.

The number of performance-based RSUs that ultimately vest is dependent on one or both of the following according to the terms of the specific award agreement: the achievement of (a) internal profitability targets (performance condition) and (b) market performance targets measured by the comparison of the Company's stock performance versus a defined peer group (market condition). Based on the achievement of internal profitability targets, the ultimate number of shares of the Company's Common Stock issued will range from zero to stretch, with stretch defined individually under each award, net of shares used to cover minimum statutory personal income taxes withheld. Performance-based RSUs are canceled to the extent actual results do not meet minimum internal profitability measures, as defined individually under each award.

Time-based RSUs. The Company grants non-employee Directors time-based RSUs annually that generally vest one year from the grant date. The Company also grants time-based RSUs to the Company's executives and certain employees that generally vest ratably over three years. The fair value of the time-based RSUs is equal to the average of the high and low price of the Company's Common Stock on the grant date less the present value of the expected dividends not received during the vesting period. Compensation expense for time-based RSUs less estimated forfeitures is recognized over the vesting period of the respective grant on a straight-line basis.

The Company's RSUs are net settled by withholding shares of the Company's Common Stock to cover minimum statutory income taxes and remitting the remaining shares of the Company's Common Stock to an individual brokerage account. Authorized shares of the Company's Common Stock are used to settle RSUs.

Under the 2009 Global Incentive Plan ("2009 GIP"), the Company may not grant RSUs with the right to participate in dividends or dividend equivalents.

Functional and reporting currencies

Functional and Reporting Currencies

For the Company's international operations where the functional currency is other than the US dollar, assets and liabilities are translated using period-end exchange rates, while the statement of operations amounts are translated using the average exchange rates for the respective period. Differences arising from the translation of assets and liabilities in comparison with the translation of the previous periods or from initial recognition during the period are included as a separate component of Accumulated other comprehensive income (loss), net.

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Summary of Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Schedule of Estimated Useful Lives of Depreciable Assets [Table Text Block]

Depreciation is calculated on a straight-line basis over the following estimated useful lives of depreciable assets:

Land improvements	20 years
Buildings and improvements	30 years
Machinery and equipment	20 years

Leasehold improvements are amortized over 10 years or the remaining life of the respective lease, whichever is shorter.

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Acquisitions, Dispositions and Plant Closures Schedule of Acquisitions (Tables)

12 Months Ended

Dec. 31, 2017

Business Acquisition [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

The preliminary purchase price allocation for the Nilit acquisition is as follows:

	As of May 3, 2017
	(In $ millions)
Cash and cash equivalents	4
Trade receivables - third party and affiliates	21
Inventories	37
Property, plant and equipment, net	36
Intangible assets (Note 11)	104
Goodwill (Note 11)(1)	136
Other assets	11
Total fair value of assets acquired	349
Trade payables - third party and affiliates	(8	)
Total debt (Note 14)	(12	)
Deferred income taxes	(26	)
Benefit obligations	(15	)
Other liabilities(2)	(45	)
Total fair value of liabilities assumed	(106	)
Net assets acquired	243

______________________________

⁽¹⁾  Goodwill consists of expected revenue and operating synergies resulting from the acquisition. None of the goodwill is deductible for income tax purposes.

⁽²⁾  Includes a $29 million acquisition payment to Nilit Group after the date of close, which was paid as of June 30, 2017.

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Ventures and Variable Interest Entities (Tables)

12 Months Ended

Dec. 31, 2017

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity [Line Items]

Schedule of Variable Interest Entities

The carrying amount of the assets and liabilities associated with Fairway included in the consolidated balance sheets are as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Cash and cash equivalents	19	18
Trade receivables, net - third party & affiliates	9	8
Property, plant and equipment (net of accumulated depreciation - 2017: $90; 2016: $50)	697	734
Intangible assets (net of accumulated amortization - 2017: $2; 2016: $1)	25	26
Other assets	6	9
Total assets(1)	756	795
Trade payables	16	15
Other liabilities(2)	4	2
Total debt	5	5
Deferred income taxes	3	2
Total liabilities	28	24

______________________________

⁽¹⁾  Assets can only be used to settle the obligations of Fairway.

⁽²⁾  Primarily represents amounts owed by Fairway to the Company for reimbursement of expenditures.

Variable Interest Entity, Not Primary Beneficiary [Member]

Variable Interest Entity [Line Items]

Schedule of Variable Interest Entities

The carrying amount of the assets and liabilities associated with the obligations to nonconsolidated VIEs, as well as the maximum exposure to loss relating to these nonconsolidated VIEs are as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Property, plant and equipment, net	53	60
Trade payables	25	53
Current installments of long-term debt	18	10
Long-term debt	76	91
Total liabilities	119	154
Maximum exposure to loss	164	240

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Marketable Securities, at Fair Value (Tables)

12 Months Ended

Dec. 31, 2017

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-sale Securities Reconciliation

The Company's nonqualified trusts hold available-for-sale securities for funding requirements of the Company's nonqualified pension plans (Note 15) as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Amortized cost	32	30
Gross unrealized gain	—	—
Gross unrealized loss	—	—
Fair value	32	30

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Receivables, Net Receivables, Net (Tables)

12 Months Ended

Dec. 31, 2017

Receivables [Abstract]

Schedule of Trade Receivables - Third Party and Affiliates, Net

	As of December 31,
	2017		2016
	(In $ millions)
Trade receivables - third party and affiliates	995		807
Allowance for doubtful accounts - third party and affiliates	(9	)	(6	)
Trade receivables - third party and affiliates, net	986		801

Schedule of Non-trade Receivables, Net

	As of December 31,
	2017	2016
	(In $ millions)
Non-income taxes receivable	81	83
Reinsurance receivables	16	16
Income taxes receivable	64	43
Other	83	81
Non-trade receivables, net	244	223

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Inventories (Tables)

12 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Schedule of Inventories

	As of December 31,
	2017	2016
	(In $ millions)
Finished goods	591	506
Work-in-process	57	45
Raw materials and supplies	252	169
Total	900	720

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Investments in Affiliates (Tables)

12 Months Ended

Dec. 31, 2017

Investments in and Advances to Affiliates, Schedule of Investments [Abstract]

Schedule of Equity Method Investments

Equity method investments and ownership interests by business segment are as follows:

	Ownership as of December 31,		Carrying Value as of December 31,		Share of Earnings (Loss) Year Ended December 31,				Dividends and Other Distributions Year Ended December 31,
	2017	2016	2017	2016	2017	2016	2015		2017		2016		2015
	(In percentages)		(In $ millions)
Advanced Engineered Materials
Ibn Sina	25	25	178	113	58	38	88		(1	)	(18	)	(98	)
InfraServ GmbH & Co. Hoechst KG(1)	32	—	139	—	19	—	—		(26	)	—		—
Fortron Industries LLC	50	50	111	100	17	9	11		(6	)	(9	)	(8	)
Korea Engineering Plastics Co., Ltd.	50	50	155	137	25	25	16		(25	)	(11	)	(10	)
Polyplastics Co., Ltd.	45	45	170	156	57	50	35		(64	)	(54	)	(20	)
Other Activities(2)
InfraServ GmbH & Co. Gendorf KG(3)	39	39	41	38	4	7	7		(5	)	(5	)	(5	)
InfraServ GmbH & Co. Hoechst KG(1)	—	32	—	132	—	22	21		—		(30	)	(32	)
InfraServ GmbH & Co. Knapsack KG(3)	27	27	20	18	2	4	4		(4	)	(4	)	(3	)
Consumer Specialties
Sherbrooke Capital Health and Wellness, L.P.(4)	10	10	3	3	1	—	(1	)	—		—		—
Total			817	697	183	155	181		(131	)	(131	)	(176	)

______________________________

⁽¹⁾  InfraServ GmbH & Co. Hoechst KG is owned primarily by an entity included in the Company's Advanced Engineered Materials segment. Prior to 2017, InfraServ GmbH & Co. Hoechst KG was owned primarily by an entity included in the Company's Other Activities segment. The Company's Consumer Specialties segment and Acetyl Intermediates segment also each hold an ownership percentage.

⁽²⁾  InfraServ real estate service companies ("InfraServ Entities") own and operate sites in Frankfurt am Main-Hoechst, Gendorf and Knapsack, Germany. The InfraServ Entities were created to own land and property and to provide various technical and administrative services at these manufacturing locations.

⁽³⁾  See Note 29 for further information.

⁽⁴⁾  The Company accounts for its ownership interest in Sherbrooke Capital Health and Wellness, L.P. under the equity method of accounting because the Company is able to exercise significant influence.

Schedule of Cost Method Investments

Cost method investments and ownership interests by business segment are as follows:

	Ownership as of December 31,		Carrying Value as of December 31,		Dividend Income for the Year Ended December 31,
	2017	2016	2017	2016	2017	2016	2015
	(In percentages)		(In $ millions)
Consumer Specialties
Kunming Cellulose Fibers Co. Ltd.	30	30	14	14	12	14	14
Nantong Cellulose Fibers Co. Ltd.	31	31	109	106	81	80	79
Zhuhai Cellulose Fibers Co. Ltd.	30	30	30	30	14	13	13
Other Activities
InfraServ GmbH & Co. Wiesbaden KG	8	8	5	5	1	1	1
Other			1	—	—	—	—
Total			159	155	108	108	107

Schedule of Transactions with Affiliates

Transactions and balances with affiliates are as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Purchases	250	203	195
Sales	—	2	—

Schedule of Balances with Affiliates

	As of December 31,
	2017	2016
	(In $ millions)
Non-trade receivables	21	26
Total due from affiliates	21	26
Short-term borrowings(1)	32	17
Trade payables	36	45
Current Other liabilities	8	8
Total due to affiliates	76	70

______________________________

⁽¹⁾  The Company has agreements with certain affiliates whereby excess affiliate cash is lent to and managed by the Company at variable interest rates governed by those agreements.

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Property, Plant and Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment, Net [Abstract]

Schedule of Property, Plant and Equipment, Net

	As of December 31,
	2017		2016
	(In $ millions)
Land	47		38
Land improvements	72		70
Buildings and building improvements	758		695
Machinery and equipment	5,101		4,753
Construction in progress	368		260
Gross asset value	6,346		5,816
Accumulated depreciation	(2,584	)	(2,239	)
Net book value	3,762		3,577

Schedule of Assets Under Capital Leases

Assets under capital leases, net, included in the amounts above are as follows:

	As of December 31,
	2017		2016
	(In $ millions)
Buildings	14		13
Machinery and equipment	296		291
Accumulated depreciation	(179	)	(149	)
Net book value	131		155

Schedule of Capitalized Interest and Depreciation Expense

Capitalized interest costs and depreciation expense are as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Capitalized interest	6	5	15
Depreciation expense	285	281	346

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Goodwill and Intangible Assets, Net (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

Goodwill

	Advanced Engineered Materials		Consumer Specialties		Industrial Specialties		Acetyl Intermediates		Total
	(In $ millions)
As of December 31, 2015	282		230		39		154		705
Acquisitions (Note 4)	106		—		—		—		106
Exchange rate changes	(3	)	(5	)	(1	)	(6	)	(15	)
As of December 31, 2016	385		225		38		148		796
Acquisitions (Note 4)	128		—		—		—		128
Exchange rate changes	42		12		2		23		79
As of December 31, 2017(1)	555		237		40		171		1,003

______________________________

⁽¹⁾  There were $0 million of accumulated impairment losses as of December 31, 2017.

Schedule of Finite-Lived Intangible Assets, Net

Finite-lived intangible assets are as follows:

	Licenses		Customer- Related Intangible Assets		Developed Technology		Covenants Not to Compete and Other		Total
	(In $ millions)
Gross Asset Value
As of December 31, 2015	38		456		35		50		579
Acquisitions (Note 4)	—		64		—		3		67		(1)
Exchange rate changes	(2	)	(11	)	—		—		(13	)
As of December 31, 2016	36		509		35		53		633
Acquisitions (Note 4)	—		73		9		—		82		(2)
Exchange rate changes	2		58		1		1		62
As of December 31, 2017	38		640		45		54		777
Accumulated Amortization
As of December 31, 2015	(25	)	(449	)	(25	)	(29	)	(528	)
Amortization	(3	)	(2	)	(2	)	(2	)	(9	)
Exchange rate changes	1		11		1		—		13
As of December 31, 2016	(27	)	(440	)	(26	)	(31	)	(524	)
Amortization	(4	)	(11	)	(3	)	(2	)	(20	)
Exchange rate changes	(2	)	(45	)	(1	)	1		(47	)
As of December 31, 2017	(33	)	(496	)	(30	)	(32	)	(591	)
Net book value	5		144		15		22		186

______________________________

⁽¹⁾  Primarily related to intangible assets acquired from SOFTER (Note 4) during the year ended December 31, 2016, with a weighted average amortization period of 12 years.

⁽²⁾  Primarily related to intangible assets acquired from Nilit (Note 4) during the year ended December 31, 2017, with a weighted average amortization period of 14 years.

Schedule of Indefinite-Lived Intangible Assets, Net

Indefinite-lived intangible assets are as follows:

	Trademarks and Trade Names
	(In $ millions)
As of December 31, 2015	74
Acquisitions (Note 4)	12
Exchange rate changes	(1	)
As of December 31, 2016	85
Acquisitions (Note 4)	22
Exchange rate changes	8
As of December 31, 2017	115

Schedule of Estimated Amortization Expense

Estimated amortization expense for the succeeding five fiscal years is as follows:

	(In $ millions)
2018	19
2019	17
2020	15
2021	15
2022	14

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Current Other Liabilities (Tables)

12 Months Ended

Dec. 31, 2017

Other Liabilities, Current [Abstract]

Schedule of Current Other Liabilities

	As of December 31,
	2017	2016
	(In $ millions)
Asset retirement obligations	19	9
Benefit obligations (Note 15)	30	31
Customer rebates	65	51
Derivatives (Note 22)	3	3
Environmental (Note 16)	14	14
Insurance	5	6
Interest	17	15
Restructuring (Note 18)	5	16
Salaries and benefits	113	97
Sales and use tax/foreign withholding tax payable	16	21
Other	67	59
Total	354	322

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Noncurrent Other Liabilities (Tables)

12 Months Ended

Dec. 31, 2017

Other Liabilities, Noncurrent [Abstract]

Schedule of Noncurrent Other Liabilities

	As of December 31,
	2017	2016
	(In $ millions)
Asset retirement obligations	7	20
Deferred proceeds	47	41
Deferred revenue	6	9
Environmental (Note 16)	59	50
Income taxes payable (Note 19)	197	6
Insurance	43	46
Other	54	43
Total	413	215

Schedule of Changes in Asset Retirement Obligations

Changes in asset retirement obligations are as follows:

	Year Ended December 31,
	2017		2016		2015
	(In $ millions)
Balance at beginning of year	29		36		37
Additions(1)	—		2		—
Accretion	1		1		1
Payments	(5	)	(10	)	(4	)
Revisions to cash flow estimates(2)	1		—		2
Balance at end of year	26		29		36

______________________________

⁽¹⁾  Primarily relates to sites which management no longer considers to have an indeterminate life.

⁽²⁾  Primarily relates to revisions to the estimated cost and timing of future obligations.

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Debt (Tables)

12 Months Ended

Dec. 31, 2017

Line of Credit Facility [Line Items]

Schedule of Short-term Debt

	As of December 31,
	2017	2016
	(In $ millions)
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates
Current installments of long-term debt	63	27
Short-term borrowings, including amounts due to affiliates(1)	86	68
Short-term SOFTER bank loans (Note 4)(2)	—	23
Revolving credit facility(3)	97	—
Accounts receivable securitization facility(4)	80	—
Total	326	118

______________________________

⁽¹⁾  The weighted average interest rate was 2.8% and 3.1% as of December 31, 2017 and 2016, respectively.

⁽²⁾  The weighted average interest rate was 1.2% as of December 31, 2016.

⁽³⁾  The weighted average interest rate was 4.1% as of December 31, 2017.

⁽⁴⁾  The weighted average interest rate was 2.1% as of December 31, 2017.

Schedule of Long-term Debt

	As of December 31,
	2017		2016
	(In $ millions)
Long-Term Debt
Senior unsecured term loan due 2021(1)	494		500
Senior unsecured notes due 2019, interest rate of 3.250%	360		316
Senior unsecured notes due 2021, interest rate of 5.875%	400		400
Senior unsecured notes due 2022, interest rate of 4.625%	500		500
Senior unsecured notes due 2023, interest rate of 1.125%	897		788
Senior unsecured notes due 2025, interest rate of 1.250%	359		—
Pollution control and industrial revenue bonds due at various dates through 2030, interest rates ranging from 4.05% to 5.00%	169		170
SOFTER bank loans due at various dates through 2021(Note 4)(2)	—		47
Nilit bank loans due at various dates through 2026 (Note 4)(3)	11		—
Obligations under capital leases due at various dates through 2054	208		217
Subtotal	3,398		2,938
Unamortized debt issuance costs(4)	(20	)	(21	)
Current installments of long-term debt	(63	)	(27	)
Total	3,315		2,890

______________________________

⁽¹⁾  The margin for borrowings under the senior unsecured term loan due 2021 was 1.5% above LIBOR at current Celanese credit ratings.

⁽²⁾  The weighted average interest rate was 1.6% as of December 31, 2016.

⁽³⁾  The weighted average interest rate was 1.3% as of December 31, 2017.

⁽⁴⁾  Related to the Company's long-term debt, excluding obligations under capital leases.

Schedule of Net Deferred Financing Costs

Net deferred financing costs are as follows:

	(In $ millions)
As of December 31, 2014	27
Financing costs deferred	—
Accelerated amortization due to refinancing activity	—
Amortization	(5	)
As of December 31, 2015(1)	22
Financing costs deferred(2)	13
Accelerated amortization due to refinancing activity(3)	(3	)
Amortization	(5	)
As of December 31, 2016(1)	27
Financing costs deferred(4)	1
Accelerated amortization due to refinancing activity	—
Amortization	(4	)
As of December 31, 2017(1)	24

____________________________

⁽¹⁾  Includes $4 million, $6 million and $4 million as of December 31,2017, 2016 and 2015, respectively, related to the Company's revolving credit facility and accounts receivables securitization facility, which are included in noncurrent Other assets in the consolidated balance sheets.

⁽²⁾  Includes $5 million, $6 million and $2 million related to the Credit Agreement, the 1.125% Notes and the pollution control and industrial revenue bonds, respectively, all of which are being amortized through the term of the respective financing arrangement.

⁽³⁾  Includes $2 million and $1 million related to the senior secured credit facilities and the pollution control and industrial revenue bonds, respectively, which are included in Refinancing expense in the consolidated statement of operations during the year ended December 31, 2016.

Schedule of Principle Payments

Principal payments scheduled to be made on the Company's debt, including short-term borrowings, are as follows:

	(In $ millions)
2018	326
2019	437
2020	80
2021	794
2022	526
Thereafter	1,498
Total	3,661

Accounts Receivable Securitization Facility [Member]

Line of Credit Facility [Line Items]

Schedule of Balances Available for Borrowing

The Company's debt balances and amounts available for borrowing under its securitization facility are as follows:

	As of December 31, 2017
	(In $ millions)
Accounts Receivable Securitization Facility
Borrowings outstanding(1)	80
Letters of credit issued	29
Available for borrowing	11
Total borrowing base	120
Maximum borrowing base(2)	120

______________________________

⁽¹⁾  The Company borrowed $85 million and repaid $5 million during the year ended December 31, 2017.

⁽²⁾  Outstanding accounts receivable transferred to the SPE was $158 million.

Senior Unsecured Revolving Credit Facility [Member]

Line of Credit Facility [Line Items]

Schedule of Balances Available for Borrowing

The Company's debt balances and amounts available for borrowing under its senior unsecured revolving credit facility are as follows:

	As of December 31, 2017
	(In $ millions)
Revolving Credit Facility
Borrowings outstanding(1)	97
Letters of credit issued	—
Available for borrowing(2)	903

______________________________

⁽¹⁾  The Company borrowed $528 million and repaid $431 million under its senior unsecured revolving credit facility during the year ended December 31, 2017.

⁽²⁾  The margin for borrowings under the senior unsecured revolving credit facility were 1.5% above LIBOR at current Company credit ratings.

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Benefit Obligations (Tables)

12 Months Ended

Dec. 31, 2017

Retirement Benefits [Abstract]

Schedule of Contributions to Multiemployer Defined Benefit Pension Plans

Contributions made by the Company to the German multiemployer plan are as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Multiemployer defined benefit plan	7	7	6

Schedule of Postemployment Obligations

Postemployment obligations are as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Postemployment benefits	8	9

Schedule of Contributions to Defined Contribution Plans

The amount of costs recognized for the Company's defined contribution plans are as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Defined contribution plans	40	43	44

Schedule of Company's Pension and Post Retirement Benefit Plans

Summarized information on the Company's pension and postretirement benefit plans is as follows:

	Pension Benefits As of December 31,				Postretirement Benefits As of December 31,
	2017		2016		2017		2016
	(In $ millions)
Change in Projected Benefit Obligation
Projected benefit obligation as of beginning of period	3,610		3,635		67		66
Service cost	9		8		1		—
Interest cost	107		113		1		2
Participant contributions	—		—		—		—
Plan amendments	—		—		—		—
Net actuarial (gain) loss(1)	151		102		(2	)	3
Divestitures	—		—		—		—
Settlements	(1	)	(1	)	—		—
Benefits paid	(233	)	(232	)	(4	)	(4	)
Federal subsidy on Medicare Part D	—		—		—		—
Curtailments	—		—		—		—
Special termination benefits	1		3		—		—
Exchange rate changes	69		(18	)	3		—
Other(2)	15		—		—		—
Projected benefit obligation as of end of period	3,728		3,610		66		67
Change in Plan Assets
Fair value of plan assets as of beginning of period	2,784		2,508		—		—
Actual return on plan assets	302		177		—		—
Employer contributions	359		346		4		4
Participant contributions	—		—		—		—
Settlements	(1	)	(1	)	—		—
Benefits paid(3)	(233	)	(232	)	(4	)	(4	)
Exchange rate changes	40		(14	)	—		—
Fair value of plan assets as of end of period	3,251		2,784		—		—
Funded status as of end of period	(477	)	(826	)	(66	)	(67	)
Amounts Recognized in the Consolidated Balance Sheets Consist of:
Noncurrent Other assets	64		22		—		—
Current Other liabilities	(24	)	(25	)	(5	)	(5	)
Benefit obligations	(517	)	(823	)	(61	)	(62	)
Net amount recognized	(477	)	(826	)	(66	)	(67	)
Amounts Recognized in Accumulated Other Comprehensive Income Consist of:
Net actuarial (gain) loss(4)	9		18		—		—
Prior service (benefit) cost	(1	)	(1	)	1		(1	)
Net amount recognized(5)	8		17		1		(1	)

______________________________

⁽¹⁾  Primarily relates to change in discount rates.

⁽²⁾  Primarily relates to the acquisition of Nilit (Note 4).

⁽³⁾  Includes benefit payments to nonqualified pension plans of $22 million and $22 million as of December 31, 2017 and 2016, respectively.

⁽⁴⁾  Relates to the pension plans of the Company's equity method investments.

⁽⁵⁾  Amount shown net of an income tax benefit of $6 million and $4 million as of December 31, 2017 and 2016, respectively, in the consolidated statements of equity (Note 17).

Schedule of Percentage of US and International Projected Benefit Obligation

The percentage of US and international projected benefit obligation at the end of the period is as follows:

	Pension Benefits As of December 31,		Postretirement Benefits As of December 31,
	2017	2016	2017	2016
	(In percentages)
US plans	83	85	54	57
International plans	17	15	46	43
Total	100	100	100	100

Schedule of Percentage of US and International Fair Value of Plan Assets

The percentage of US and international fair value of plan assets at the end of the period is as follows:

	Pension Benefits As of December 31,
	2017	2016
	(In percentages)
US plans	88	88
International plans	12	12
Total	100	100

Schedule of Pension Plans with Projected Benefit Obligations in Excess of Plan Assets

Pension plans with projected benefit obligations in excess of plan assets are as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Projected benefit obligation	882	3,559
Fair value of plan assets	341	2,711

Schedule of Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets

ension plans with accumulated benefit obligations in excess of plan assets are as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Accumulated benefit obligation	861	3,538
Fair value of plan assets	338	2,708

Schedule of Accumulated Benefit Obligation for All Defined Benefit Pension Plans

The accumulated benefit obligation for all defined benefit pension plans is as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Accumulated benefit obligation	3,710	3,591

Schedule of Net Periodic Benefit Costs

The components of net periodic benefit cost are as follows:

	Pension Benefits Year Ended December 31,						Postretirement Benefits Year Ended December 31,
	2017		2016		2015		2017		2016		2015
	(In $ millions)
Service cost	9		8		12		1		—		1
Interest cost	107		113		139		1		2		3
Expected return on plan assets	(198	)	(177	)	(209	)	—		—		—
Amortization of prior service cost / (credit)	—		—		—		(1	)	(3	)	—
Recognized actuarial (gain) loss	48		101		134		(2	)	2		(7	)
Curtailment (gain) loss	—		—		(3	)	—		—		—
Settlement (gain) loss	—		—		—		—		—		—
Special termination benefit	1		3		2		—		—		—
Total	(33	)	48		75		(1	)	1		(3	)

Schedule of Amortization of Accumulated Other Comprehensive Income (Loss), Net Into Net Periodic Benefit Cost

Amortization of Accumulated other comprehensive income (loss), net into net periodic benefit cost in 2018 is expected to be as follows:

	Pension Benefits	Postretirement Benefits
	(In $ millions)
Prior service cost	—	—

Schedule of Nonqualified Pension Plans Funded with Nonqualified Trusts

The Company maintains nonqualified pension plans funded with nonqualified trusts for certain US employees as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Nonqualified Trust Assets
Marketable securities, at fair value	32	30
Noncurrent Other assets, consisting of insurance contracts	42	49
Nonqualified Pension Obligations
Current Other liabilities	22	22
Benefit obligations	237	241

Schedule of Expense Related to Nonqualified Pension Plans Included in Net Periodic Benefit Cost, Excluding Returns on Assets

Expense relating to the nonqualified pension plans included in net periodic benefit cost, excluding returns on the assets held by the nonqualified trusts, is as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Total	18	18	—	(1)

______________________________

⁽¹⁾  Actuarial gain offset interest cost.

Schedule of Principle Weighted Average Assumptions Used to Determine Benefit Obligations and Benefit Cost

The principal weighted average assumptions used to determine benefit obligation are as follows:

	Pension Benefits As of December 31,		Postretirement Benefits As of December 31,
	2017	2016	2017	2016
	(In percentages)
Discount Rate Obligations
US plans	3.5	3.9	3.4	3.8
International plans	2.1	2.1	3.2	3.3
Combined	3.3	3.7	3.2	3.4
Rate of Compensation Increase
US plans	N/A	N/A
International plans	2.8	2.8
Combined	2.8	2.8

The principal weighted average assumptions used to determine net periodic benefit cost are as follows:

	Pension Benefits Year Ended December 31,			Postretirement Benefits Year Ended December 31,
	2017	2016	2015	2017	2016	2015
	(In percentages)
Discount Rate Obligations
US plans	3.9	4.2	3.9	3.8	4.0	3.7
International plans	2.1	2.6	2.4	3.3	3.6	3.5
Combined	3.7	4.0	3.7	3.4	3.9	3.6
Discount Rate Service Cost(1)
US plans	1.2	4.5	3.9	4.0	4.2	3.7
International plans	2.5	3.1	2.4	3.4	3.8	3.5
Combined	2.5	3.1	3.7	2.9	3.8	3.6
Discount Rate Interest Cost(1)
US plans	3.3	3.4	3.9	3.1	3.1	3.7
International plans	1.7	2.2	2.4	2.9	3.1	3.5
Combined	3.1	3.2	3.7	2.9	3.1	3.6
Expected Return on Plan Assets
US plans	7.5	7.5	8.0
International plans	5.9	6.1	6.0
Combined	7.3	7.3	7.8
Rate of Compensation Increase
US plans	N/A	N/A	N/A
International plans	2.8	2.7	2.8
Combined	2.8	2.7	2.8

______________________________

⁽¹⁾  Beginning in 2016, weighted-average discount rates reflect the adoption of the full yield curve approach.

Schedule of Health Care Cost Trend Rates

The Company's health care cost trend assumptions for US postretirement medical plan's net periodic benefit cost are as follows:

	As of December 31,
	2017	2016	2015
	(In percentages, except year)
Health care cost trend rate assumed for next year	9.0	9.5	10.0
Health care cost trend ultimate rate	5.0	5.0	5.0
Health care cost trend ultimate rate year	2026	2026	2026

Schedule of Impact of One-Percentage-Point Change in Assumed Health Care Cost Trend

The impact of a one percentage point change in the assumed health care cost trend is as follows:

	Trend Rate Change
	Decreases 1%	Increases 1%
	(In $ millions)
Postretirement obligations	2	2
Service and interest cost	—	—

Schedule of Weighted Average Target Asset Allocations

The weighted average target asset allocations for the Company's pension plans in 2017 are as follows:

	US Plans	International Plans
	(In percentages)
Bonds - domestic to plans	75	59
Equities - domestic to plans	8	16
Equities - international to plans	7	—
Other	10	25
Total	100	100

Schedule of Fair Values of Pension Plan Assets

Other: Composed of real estate investment trust common stock valued at closing price as reported on the active market in which the individual securities are traded.

	Fair Value Measurement
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Total
	As of December 31,
	2017	2016	2017	2016	2017	2016
	(In $ millions)
Assets
Cash and cash equivalents	5	2	—	—	5	2
Derivatives
Swaps	—	—	8	2	8	2
Equity securities
US companies	—	260	—	—	—	260
International companies	72	345	—	—	72	345
Fixed income
Corporate debt	—	—	776	798	776	798
Treasuries, other debt	48	37	1,411	793	1,459	830
Mortgage backed securities	—	—	7	7	7	7
Insurance contracts	—	—	36	31	36	31
Other	4	24	1	—	5	24
Total investments, at fair value(1)	129	668	2,239	1,631	2,368	2,299
Liabilities
Derivatives
Swaps	—	—	7	2	7	2
Other	—	—	—	1	—	1
Total liabilities	—	—	7	3	7	3
Total net assets(2)	129	668	2,232	1,628	2,361	2,296

______________________________

⁽¹⁾  In accordance with ASU 2015-07 (Note 2), certain investments that are measured at fair value using the NAV per share practical expedient have not been classified in the fair value hierarchy. Total investments, at fair value, for the year ended December 31, 2017 excludes investments in common/collective trusts, registered investment companies and short-term investment funds with fair values of $727 million, $60 million and $96 million, respectively. Total investments, at fair value, for the year ended December 31, 2016 excludes investments in common/collective trusts, registered investment companies and short-term investment funds with fair values of $195 million, $134 million and $149 million, respectively.

⁽²⁾  Total net assets excludes non-financial plan receivables and paya

Schedule of Company Commitments to Fund Benefit Obligations

Benefit obligation funding is as follows:

	Total Expected 2018
	(In $ millions)
Cash contributions to defined benefit pension plans	23
Benefit payments to nonqualified pension plans	21
Benefit payments to other postretirement benefit plans	5

Schedule of Pension Benefits Expected to be Paid from the Plans or From the Company's Assets

Pension and postretirement benefits expected to be paid are as follows:

	Pension Benefit Payments(1)	Company Portion of Postretirement Benefit Cost(2)
	(In $ millions)
2018	235	5
2019	233	5
2020	231	4
2021	227	4
2022	224	4
2023-2027	1,090	18

______________________________

⁽¹⁾  Payments are expected to be made primarily from plan assets.

⁽²⁾  Payments are expected to be made primarily from Company assets.

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Environmental (Tables)

12 Months Ended

Dec. 31, 2017

Environmental Remediation Obligations [Abstract]

Schedule of Environmental Remediation Reserves

The components of environmental remediation reserves are as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Demerger obligations (Note 24)	28	18
Divestiture obligations (Note 24)	17	16
Active sites	15	16
US Superfund sites	11	11
Other environmental remediation reserves	2	3
Total	73	64

Schedule of Environmental Ownership and Liability Percentages

The Company's ownership interest and environmental liability participation percentages for such liabilities, which cannot be attributed to an InfraServ partner are as follows:

	As of December 31, 2017
	Ownership	Liability	Reserves(1)
	(In percentages)		(In $ millions)
InfraServ GmbH & Co. Gendorf KG(2)	39	10	9
InfraServ GmbH & Co. Hoechst KG	32	40	71
InfraServ GmbH & Co. Knapsack KG(2)	27	22	1

______________________________

⁽¹⁾  Gross reserves maintained by the respective InfraServ entity.

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Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2017

Stockholders' Equity Note [Abstract]

Schedule of Dividend Increases

The Company's Board of Directors approved increases in the Company's Common Stock cash dividend rates as follows:

	Increase	Quarterly Common Stock Cash Dividend	Annual Common Stock Cash Dividend	Effective Date
	(In percentages)	(In $ per share)
April 2015	20	0.30	1.20	May 2015
April 2016	20	0.36	1.44	May 2016
April 2017	28	0.46	1.84	May 2017

Schedule of Treasury Stock

These authorizations give management discretion in determining the timing and conditions under which shares may be repurchased. This repurchase program does not have an expiration date.

The share repurchase activity pursuant to this authorization is as follows:

	Year Ended December 31,							Total From February 2008 Through December 31, 2017
	2017		2016		2015
Shares repurchased	5,436,803		7,034,420		6,640,601		(1)	39,779,019
Average purchase price per share	$	91.97	$	71.08	$	63.31		$	58.71
Amount spent on repurchased shares (in millions)	$	500	$	500	$	420		$	2,335
Aggregate Board of Directors repurchase authorizations during the period (in millions)(2)	$	1,500	$	—	$	1,000		$	3,866

______________________________

⁽¹⁾  The year ended December 31, 2015 excludes 9,264 shares withheld from an executive officer to cover statutory minimum withholding requirements for personal income taxes related to the vesting of restricted stock. Restricted stock awards are considered outstanding at the time of issuance. Accordingly, the shares withheld are treated as treasury shares.

⁽²⁾  These authorizations give management discretion in determining the timing and conditions under which shares may be repurchased. This repurchase program began in February 2008 and does not have an expiration date.

Schedule of Components of Other Comprehensive Income (Loss), Net

	Year Ended December 31,
	2017					2016					2015
	Gross Amount	Income Tax (Provision) Benefit		Net Amount		Gross Amount		Income Tax (Provision) Benefit	Net Amount		Gross Amount		Income Tax (Provision) Benefit		Net Amount
	(In $ millions)
Unrealized gain (loss) on marketable securities	—	(1	)	(1	)	—		—	—		—		—		—
Foreign currency translation	162	12		174		(22	)	11	(11	)	(193	)	5		(188	)
Gain (loss) on cash flow hedges	—	(1	)	(1	)	5		—	5		3		(1	)	2
Pension and postretirement benefits	7	2		9		(5	)	1	(4	)	4		(1	)	3
Total	169	12		181		(22	)	12	(10	)	(186	)	3		(183	)

Schedule of Adjustments to Accumulated Other Comprehensive Income (Loss), Net

Adjustments to Accumulated other comprehensive income (loss), net, are as follows:

	Unrealized Gain (Loss) on Marketable Securities (Note 6)		Foreign Currency Translation		Gain (Loss) from Cash Flow Hedges (Note 22)		Pension and Postretirement Benefits (Note 15)		Accumulated Other Comprehensive Income (Loss), Net
	(In $ millions)
As of December 31, 2014	1		(151	)	(4	)	(11	)	(165	)
Other comprehensive income (loss) before reclassifications	—		(193	)	(2	)	6		(189	)
Amounts reclassified from accumulated other comprehensive income (loss)	—		—		5		(2	)	3
Income tax (provision) benefit	—		5		(1	)	(1	)	3
As of December 31, 2015	1		(339	)	(2	)	(8	)	(348	)
Other comprehensive income (loss) before reclassifications	—		(22	)	7		(3	)	(18	)
Amounts reclassified from accumulated other comprehensive income (loss)	—		—		(2	)	(2	)	(4	)
Income tax (provision) benefit	—		11		—		1		12
As of December 31, 2016	1		(350	)	3		(12	)	(358	)
Other comprehensive income (loss) before reclassifications	—		162		4		8		174
Amounts reclassified from accumulated other comprehensive income (loss)	—		—		(4	)	(1	)	(5	)
Income tax (provision) benefit	(1	)	12		(1	)	2		12
As of December 31, 2017	—		(176	)	2		(3	)	(177	)

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Other (Charges) Gains, Net (Tables)

12 Months Ended

Dec. 31, 2017

Restructuring and Related Activities [Abstract]

Schedule of Other (Charges) Gains, Net

	Year Ended December 31,
	2017		2016		2015
	(In $ millions)
Employee termination benefits (Note 4)(1)	(4	)	(11	)	(53	)
InfraServ ownership change	(4	)	—		—
Asset impairments	—		(2	)	(126	)
Other plant/office closures	(52	)	—		—
Singapore contract termination	—		—		(174	)
Commercial disputes	—		2		2
Total	(60	)	(11	)	(351	)

______________________________

⁽¹⁾  Includes $1 million and $3 million of special termination benefits included in Benefit obligations in the consolidated balance sheet as of December 31, 2017 and 2016, respectively.

Schedule of Restructuring Reserve

The changes in the restructuring reserves by business segment are as follows:

	Advanced Engineered Materials		Consumer Specialties		Industrial Specialties		Acetyl Intermediates		Other		Total
	(In $ millions)
Employee Termination Benefits
As of December 31, 2015	3		14		6		1		6		30
Additions	2		2		2		1		3		10
Cash payments	(3	)	(6	)	(6	)	(1	)	(5	)	(21	)
Other changes	(1	)	—		—		—		(1	)	(2	)
Exchange rate changes	—		(1	)	—		—		—		(1	)
As of December 31, 2016	1		9		2		1		3		16
Additions	1		2		—		—		1		4
Cash payments	(1	)	(3	)	(2	)	—		(2	)	(8	)
Other changes	—		(8	)	—		—		(1	)	(9	)
Exchange rate changes	—		—		—		—		—		—
As of December 31, 2017	1		—		—		1		1		3
Other Plant/Office Closures
As of December 31, 2015	—		—		—		—		—		—
Additions	—		—		—		—		—		—
Cash payments	—		—		—		—		—		—
Other changes	—		—		—		—		—		—
Exchange rate changes	—		—		—		—		—		—
As of December 31, 2016	—		—		—		—		—		—
Additions	—		—		—		29		—		29
Cash payments	—		—		—		(24	)	—		(24	)
Other changes	—		—		—		(3	)	—		(3	)
Exchange rate changes	—		—		—		—		—		—
As of December 31, 2017	—		—		—		2		—		2
Total	1		—		—		3		1		5

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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Schedule of Earnings (Loss) from Continuing Operations Before Tax by Jurisdiction

Earnings (loss) from continuing operations before tax by jurisdiction are as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
US	262	326	231
International	813	704	257
Total	1,075	1,030	488

Schedule of Income Tax Provision (Benefit)

The income tax provision (benefit) consists of the following:

	Year Ended December 31,
	2017		2016		2015
	(In $ millions)
Current
US	201		(22	)	28
International	158		60		152
Total	359		38		180
Deferred
US	(110	)	108		54
International	(36	)	(24	)	(33	)
Total	(146	)	84		21
Total	213		122		201

Schedule of Effective Tax Rate Reconciliation

A reconciliation of the significant differences between the US federal statutory tax rate of 35% and the effective income tax rate on income from continuing operations is as follows:

	Year Ended December 31,
	2017		2016		2015
	(In $ millions, except percentages)
Income tax provision computed at US federal statutory tax rate	376		361		171
Change in valuation allowance	218		(18	)	124
Equity income and dividends	(87	)	(60	)	(33	)
(Income) expense not resulting in tax impact, net	(157	)	(152	)	(32	)
US tax effect of foreign earnings and dividends	521		302		15
Foreign tax credits	(759	)	(293	)	(4	)
Other foreign tax rate differentials	(38	)	(48	)	(47	)
Legislative changes	116		4		9
State income taxes, net of federal benefit	12		8		6
Other, net	11		18		(8	)
Income tax provision (benefit)	213		122		201
Effective income tax rate	20	%	12	%	41	%

Schedule of Consolidated Deferred Tax Assets and Liabilities

Significant components of the consolidated deferred tax assets and liabilities are as follows:

	As of December 31,
	2017		2016
	(In $ millions)
Deferred Tax Assets
Pension and postretirement obligations(1)	143		313
Accrued expenses	50		61
Inventory	10		11
Net operating loss	703		661
Tax credit carryforwards(2)	478		136
Other	192		161
Subtotal	1,576		1,343
Valuation allowance(3)	(618	)	(386	)
Total	958		957
Deferred Tax Liabilities
Depreciation and amortization	307		366
Investments in affiliates	427		475
Other	69		87
Total	803		928
Net deferred tax assets (liabilities)	155		29

______________________________

⁽¹⁾  For the year ended December 31, 2017, the pension and postretirement obligations decreased primarily due to $316 million in employer contributions made to the US defined benefit plans (Note 15).

⁽²⁾  For the year ended December 31, 2017, the tax credit carryforwards increased primarily due to internal reorganization transactions made in preparation for the proposed acetate tow joint venture with Blackstone discussed herein and Note 4.

⁽³⁾  Includes deferred tax asset valuation allowances for the Company's deferred tax assets in the US, Luxembourg, Spain, China, Singapore, the United Kingdom, Canada and France. These valuation allowances relate primarily to net operating loss carryforward benefits and other net deferred tax assets, all of which may not be realizable.

Schedule of Activity Related to Uncertain Tax Positions

Activity related to uncertain tax positions is as follows:

	Year Ended December 31,
	2017		2016		2015
	(In $ millions)
As of the beginning of the year	114		158		228
Increases in tax positions for the current year	14		9		13
Increases in tax positions for prior years(1)	4		11		76
Decreases in tax positions for prior years	(7	)	(9	)	(126	)
Decreases due to settlements	(6	)	(55	)	(33	)
As of the end of the year	119		114		158
Total uncertain tax positions that if recognized would impact the effective tax rate	100		87		144
Total amount of interest expense (benefit) and penalties recognized in the consolidated statements of operations(2)	6		(16	)	(12	)
Total amount of interest expense and penalties recognized in the consolidated balance sheets	38		26		43

______________________________

⁽¹⁾  Includes uncertain tax positions related to the Nilit acquisition (Note 4) of $4 million for the year ended December 31, 2017.

⁽²⁾  This amount reflects interest on uncertain tax positions and release of certain tax positions as a result of audit closure that was reflected in the consolidated statements of operations. In addition, for the years ended December 31, 2016 and 2015, the Company also paid an additional $1 million and $12 million, respectively, of previously accrued amounts due to settlements of tax examinations.

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Management Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2017

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Total Shares Available for and Subject to Awards

Total shares available for awards and total shares subject to outstanding awards are as follows:

	As of December 31, 2017
	Shares Available for Awards	Shares Subject to Outstanding Awards
2009 GIP	5,663,628	1,701,713

Schedule of Realized Income Tax Benefits from Stock Option Exercises and RSU Vestings

The Company realized income tax benefits from stock option exercises and RSU vestings as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Income tax benefit realized	9	7	2

Schedule of Summary of Changes in Performance-based RSUs Outstanding

A summary of changes in nonvested performance-based RSUs outstanding is as follows:

	Number of Units		Weighted Average Grant Date Fair Value
	(In thousands)		(In $)
As of December 31, 2016	1,085		53.36
Granted	314		83.52
Additional performance-based RSUs granted(1)	225		48.70
Vested	(527	)	49.36
Canceled	(150	)	53.21
Forfeited	(87	)	62.36
As of December 31, 2017	860		64.71

______________________________

⁽¹⁾  Represents additional performance-based RSU grants in 2014 that were awarded in 2017 as a result of achieving internal profitability targets.

Schedule of Summary of Changes in Time-based RSUs Outstanding

A summary of changes in nonvested time-based RSUs outstanding is as follows:

	Number of Units		Weighted Average  Grant Date Fair Value
	(In thousands)		(In $)
As of December 31, 2016	344		67.42
Granted	159		86.20
Vested	(123	)	67.78
Forfeited	(29	)	68.29
As of December 31, 2017	351		75.75

Performance Shares [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Fair Value of Shares Vested

The fair value of shares vested for performance-based RSUs is as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Total	42	64	27

Time Restricted Stock Units (RSUs) [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Fair Value of Shares Vested

The fair value of shares vested for time-based RSUs is as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Total	12	4	6

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Leases (Tables)

12 Months Ended

Dec. 31, 2017

Leases [Abstract]

Schedule of Future Minimum Lease Payments for Capital Leases

Future minimum lease payments under non-cancelable rental and lease agreements, which have initial or remaining terms in excess of one year are as follows:

	As of December 31, 2017
	Capital Leases
	(In $ millions)
2018	53
2019	46
2020	45
2021	44
2022	33
Later years	114
Sublease income	—
Minimum lease commitments	335
Less amounts representing interest	(127	)
Present value of net minimum lease obligations	208

Schedule of Future Minimum Rental Payments for Operating Leases

	As of December 31, 2017
	Operating Leases
	(In $ millions)
2018	54
2019	47
2020	37
2021	28
2022	22
Later years	155
Sublease income	—
Minimum lease commitments	343

Schedule of Rent Expense

Rent expense recorded under all operating leases is as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Total	159	154	154

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Derivative Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2017

Derivative [Line Items]

Schedule of Notional Amounts of Net Foreign Exchange Exposure by Currency

The total US dollar equivalents of net foreign exchange exposure related to (short) long foreign exchange forward contracts outstanding by currency are as follows:

	2017 Maturity
	(In $ millions)
Currency
Brazilian real	(13	)
British pound sterling	(93	)
Canadian dollar	36
Euro	(6	)
Hungarian forint	10
Korean won	10
Singapore dollar	32
Swedish krona	(4	)
Total	(28	)

Schedule of Derivatives Instruments Activity

Hedging activity for foreign currency forwards and commodity swaps is as follows:

	Year Ended December 31,			Statement of Operations Classification
	2017	2016	2015
	(In $ millions)
Hedging activities	4	2	2	Cost of sales
Ineffective portion of hedging activities	—	—	—	Other income (expense), net

Schedule of Changes in Fair Value of Derivatives

Information regarding changes in the fair value of the Company's derivative and non-derivative instruments is as follows:

	Gain (Loss) Recognized in Other Comprehensive Income (Loss)				Gain (Loss) Recognized in Earnings (Loss)					Statement of Operations Classification
	Year Ended December 31,				Year Ended December 31,
	2017		2016	2015	2017		2016	2015
	(In $ millions)
Designated as Cash Flow Hedges
Commodity swaps	4		7	—	5		2	—		Cost of sales
Cross-currency swaps	—		—	—	—		—	46		Other income (expense), net or Foreign exchange gain (loss)
Foreign currency forwards	(1	)	—	—	(1	)	—	—		Cost of sales
Total	3		7	—	4		2	46
Designated as a Net Investment Hedge
Foreign currency denominated debt (Note 14)	(119	)	61	48	—		—	—		N/A
Foreign currency forwards	2		—	—	—		—	—		N/A
Total	(117	)	61	48	—		—	—
Not Designated as Hedges
Interest rate swaps	—		—	—	—		—	(1	)	Interest expense
Foreign currency forwards and swaps	—		—	—	2		14	(82	)	Foreign exchange gain (loss), net; Other income (expense), net
Total	—		—	—	2		14	(83	)

Offsetting Assets

Information regarding the gross amounts of the Company's derivative instruments and the amounts offset in the consolidated balance sheets is as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Derivative Assets
Gross amount recognized	13	14
Gross amount offset in the consolidated balance sheets	4	4
Net amount presented in the consolidated balance sheets	9	10
Gross amount not offset in the consolidated balance sheets	3	2
Net amount	6	8

Offsetting Liabilities

	As of December 31,
	2017	2016
	(In $ millions)
Derivative Liabilities
Gross amount recognized	7	7
Gross amount offset in the consolidated balance sheets	4	4
Net amount presented in the consolidated balance sheets	3	3
Gross amount not offset in the consolidated balance sheets	3	2
Net amount	—	1

Foreign Exchange Forward [Member]

Derivative [Line Items]

Schedule of Notional Amounts of Foreign Currency Derivatives

Gross notional values of the foreign currency forwards and swaps are as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Total	740	508

Foreign Currency Denominated Debt [Member] | Net Investment Hedging [Member]

Derivative [Line Items]

Schedule of Notional Amounts of Foreign Currency Derivatives

The total notional amount of foreign currency denominated debt designated as a net investment hedge of net investments in foreign operations are as follows:

	As of December 31,
	2017	2016
	(In € millions)
Total	1,050	850

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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis

De

Schedule of Carrying Values and Fair Values of Financial Instruments

Carrying values and fair values of financial instruments that are not carried at fair value are as follows:

			Fair Value Measurement
	Carrying Amount		Significant Other Observable Inputs (Level 2)		Unobservable Inputs (Level 3)		Total
	As of December 31,
	2017	2016	2017	2016	2017	2016	2017	2016
	(In $ millions)
Cost investments	159	155	—	—	—	—	—	—
Insurance contracts in nonqualified trusts	42	49	42	49	—	—	42	49
Long-term debt, including current installments of long-term debt	3,398	2,938	3,299	2,826	208	217	3,507	3,043

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Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2017

Supplemental Cash Flow Information [Abstract]

Schedule of Supplemental Cash Flow Information

	Year Ended December 31,
	2017		2016	2015
	(In $ millions)
Interest paid, net of amounts capitalized	130		130	120
Taxes paid, net of refunds	123		129	151
Noncash Investing and Financing Activities
Accrued capital expenditures	14		1	(37	)
Asset retirement obligations	2		2	3
Capital lease obligations	—		—	6
Fair value adjustment to securities available for sale, net of tax	(1	)	—	—
Distribution to noncontrolling interests (Note 5)	—		—	(4	)

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Segment Information (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Schedule of Business Segments

	Advanced Engineered Materials		Consumer Specialties			Industrial Specialties			Acetyl Intermediates			Other Activities		Eliminations		Consolidated
	(In $ millions)
	Year Ended December 31, 2017
Net sales	2,096		785		(1)	1,023		(2)	2,669		(3)	—		(433	)	6,140
Other (charges) gains, net (Note 18)	(2	)	(2	)		—			(52	)		(4	)	—		(60	)
Operating profit (loss)	383		218			87			424			(211	)	—		901
Equity in net earnings (loss) of affiliates	168		3			—			6			6		—		183
Depreciation and amortization	108		44			38			105			10		—		305
Capital expenditures	75		42			30			120			14		—		281		(4)
	As of December 31, 2017
Goodwill and intangible assets, net	798		258			46			202			—		—		1,304
Total assets	3,672		1,357			861			2,657			991		—		9,538
	Year Ended December 31, 2016
Net sales	1,444		929		(1)	979		(2)	2,441		(3)	—		(404	)	5,389
Other (charges) gains, net (Note 18)	(2	)	(2	)		(3	)		(3	)		(1	)	—		(11	)
Operating profit (loss)	350		302			105			340			(205	)	1		893
Equity in net earnings (loss) of affiliates	122		3			—			6			24		—		155
Depreciation and amortization	92		45			34			107			12		—		290
Capital expenditures	73		38			57			67			12		—		247		(4)
	As of December 31, 2016
Goodwill and intangible assets, net	517		244			46			183			—		—		990
Total assets	2,792		1,324			758			2,440			1,043		—		8,357
	Year Ended December 31, 2015
Net sales	1,326		969		(1)	1,082		(2)	2,744		(3)	—		(447	)	5,674
Other (charges) gains, net (Note 18)	(7	)	(25	)		(10	)		(300	)		(9	)	—		(351	)
Operating profit (loss)	235		262			72			(3	)		(240	)	—		326
Equity in net earnings (loss) of affiliates	150		2			—			6			23		—		181
Depreciation and amortization	99		60			64			123			11		—		357
Capital expenditures	73		65			56			282			7		—		483		(4)

______________________________

⁽¹⁾  Includes intersegment sales of $2 million, $0 million and $0 million for the year ended December 31, 2017, 2016 and 2015, respectively.

⁽²⁾  Includes intersegment sales of $4 million, $3 million and $0 million for the years ended December 31, 2017, 2016 and 2015, respectively.

⁽³⁾  Includes intersegment sales of $427 million, $401 million and $447 million for the years ended December 31, 2017, 2016 and 2015, respectively.

⁽⁴⁾  Includes an increase in accrued capital expenditures of $14 million, an increase of $1 million and a decrease of $37 million for the years ended December 31, 2017, 2016 and 2015, respectively.

Schedule of Geographical Segments

mation

The net sales based on the geographic location of the Company's facilities are as follows:

	Year Ended December 31,
	2017	2016	2015
	(In $ millions)
Belgium	295	408	417
Canada	92	123	162
China	833	745	800
Germany	1,776	1,540	1,779
Italy	259	13	—
Mexico	257	214	204
Singapore	867	758	703
US	1,572	1,451	1,463
Other	189	137	146
Total	6,140	5,389	5,674

Property, plant and equipment, net based on the geographic location of the Company's facilities is as follows:

	As of December 31,
	2017	2016
	(In $ millions)
Belgium	57	55
Canada	128	132
China	363	359
Germany	979	868
Italy	51	45
Mexico	162	159
Singapore	87	90
US	1,857	1,798
Other	78	71
Total	3,762	3,577

XML

Earnings (Loss) Per Share (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Schedule of Earnings (Loss) Per Share

	Year Ended December 31,
	2017		2016		2015
	(In $ millions, except share data)
Amounts attributable to Celanese Corporation
Earnings (loss) from continuing operations	856		902		306
Earnings (loss) from discontinued operations	(13	)	(2	)	(2	)
Net earnings (loss)	843		900		304
Weighted average shares - basic	137,902,667		144,939,433		150,838,050
Incremental shares attributable to equity awards(1)	414,728		728,748		1,449,905
Weighted average shares - diluted	138,317,395		145,668,181		152,287,955

______________________________

⁽¹⁾  Excludes 29, 836 and 2,903 equity award shares for the years ended December 31, 2017, 2016 and 2015, respectively, as their effect would have been antidilutive.

XML

Consolidating Guarantor Financial Information (Tables)

12 Months Ended

Dec. 31, 2017

Consolidating Guarantor Financial Information [Abstract]

Schedule of Consolidating Statements of Operations

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF OPERATIONS

	Year Ended December 31, 2017
	Parent Guarantor	Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net sales	—	—		2,240		5,013		(1,113	)	6,140
Cost of sales	—	—		(1,717	)	(4,016	)	1,108		(4,625	)
Gross profit	—	—		523		997		(5	)	1,515
Selling, general and administrative expenses	—	—		(135	)	(321	)	—		(456	)
Amortization of intangible assets	—	—		(4	)	(16	)	—		(20	)
Research and development expenses	—	—		(31	)	(41	)	—		(72	)
Other (charges) gains, net	—	—		(7	)	(53	)	—		(60	)
Foreign exchange gain (loss), net	—	—		—		(1	)	—		(1	)
Gain (loss) on disposition of businesses and assets, net	—	—		(8	)	3		—		(5	)
Operating profit (loss)	—	—		338		568		(5	)	901
Equity in net earnings (loss) of affiliates	843	867		591		166		(2,284	)	183
Interest expense	—	(20	)	(104	)	(30	)	32		(122	)
Refinancing expense	—	—		—		—		—		—
Interest income	—	25		4		5		(32	)	2
Dividend income - cost investments	—	—		—		111		(3	)	108
Other income (expense), net	—	(3	)	2		4		—		3
Earnings (loss) from continuing operations before tax	843	869		831		824		(2,292	)	1,075
Income tax (provision) benefit	—	(26	)	(62	)	(125	)	—		(213	)
Earnings (loss) from continuing operations	843	843		769		699		(2,292	)	862
Earnings (loss) from operation of discontinued operations	—	—		(2	)	(14	)	—		(16	)
Gain (loss) on disposition of discontinued operations	—	—		—		—		—		—
Income tax (provision) benefit from discontinued operations	—	—		1		2		—		3
Earnings (loss) from discontinued operations	—	—		(1	)	(12	)	—		(13	)
Net earnings (loss)	843	843		768		687		(2,292	)	849
Net (earnings) loss attributable to noncontrolling interests	—	—		—		(6	)	—		(6	)
Net earnings (loss) attributable to Celanese Corporation	843	843		768		681		(2,292	)	843

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF OPERATIONS

	Year Ended December 31, 2016
	Parent Guarantor	Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net sales	—	—		2,162		4,322		(1,095	)	5,389
Cost of sales	—	—		(1,657	)	(3,428	)	1,101		(3,984	)
Gross profit	—	—		505		894		6		1,405
Selling, general and administrative expenses	—	—		(112	)	(304	)	—		(416	)
Amortization of intangible assets	—	—		(5	)	(4	)	—		(9	)
Research and development expenses	—	—		(32	)	(46	)	—		(78	)
Other (charges) gains, net	—	—		—		(11	)	—		(11	)
Foreign exchange gain (loss), net	—	—		—		(1	)	—		(1	)
Gain (loss) on disposition of businesses and assets, net	—	—		(8	)	17		(6	)	3
Operating profit (loss)	—	—		348		545		—		893
Equity in net earnings (loss) of affiliates	898	939		653		146		(2,481	)	155
Interest expense	—	(16	)	(94	)	(29	)	19		(120	)
Refinancing expense	—	(4	)	(2	)	—		—		(6	)
Interest income	—	12		4		5		(19	)	2
Dividend income - cost investments	—	—		—		107		1		108
Other income (expense), net	—	(1	)	1		(2	)	—		(2	)
Earnings (loss) from continuing operations before tax	898	930		910		772		(2,480	)	1,030
Income tax (provision) benefit	2	(32	)	(53	)	(36	)	(3	)	(122	)
Earnings (loss) from continuing operations	900	898		857		736		(2,483	)	908
Earnings (loss) from operation of discontinued operations	—	—		(2	)	(1	)	—		(3	)
Gain (loss) on disposition of discontinued operations	—	—		—		—		—		—
Income tax (provision) benefit from discontinued operations	—	—		—		1		—		1
Earnings (loss) from discontinued operations	—	—		(2	)	—		—		(2	)
Net earnings (loss)	900	898		855		736		(2,483	)	906
Net (earnings) loss attributable to noncontrolling interests	—	—		—		(6	)	—		(6	)
Net earnings (loss) attributable to Celanese Corporation	900	898		855		730		(2,483	)	900

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF OPERATIONS

	Year Ended December 31, 2015
	Parent Guarantor	Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net sales	—	—		2,410		4,485		(1,221	)	5,674
Cost of sales	—	—		(1,729	)	(3,897	)	1,270		(4,356	)
Gross profit	—	—		681		588		49		1,318
Selling, general and administrative expenses	—	—		(242	)	(264	)	—		(506	)
Amortization of intangible assets	—	—		(5	)	(6	)	—		(11	)
Research and development expenses	—	—		(78	)	(41	)	—		(119	)
Other (charges) gains, net	—	—		(5	)	(346	)	—		(351	)
Foreign exchange gain (loss), net	—	—		—		4		—		4
Gain (loss) on disposition of businesses and assets, net	—	—		(6	)	(3	)	—		(9	)
Operating profit (loss)	—	—		345		(68	)	49		326
Equity in net earnings (loss) of affiliates	302	314		84		162		(681	)	181
Interest expense	—	(77	)	(76	)	(36	)	70		(119	)
Refinancing expense	—	—		—		—		—		—
Interest income	—	18		40		13		(70	)	1
Dividend income - cost investments	—	—		—		107		—		107
Other income (expense), net	—	(2	)	2		(8	)	—		(8	)
Earnings (loss) from continuing operations before tax	302	253		395		170		(632	)	488
Income tax (provision) benefit	2	49		(133	)	(98	)	(21	)	(201	)
Earnings (loss) from continuing operations	304	302		262		72		(653	)	287
Earnings (loss) from operation of discontinued operations	—	—		(3	)	—		—		(3	)
Gain (loss) on disposition of discontinued operations	—	—		—		—		—		—
Income tax (provision) benefit from discontinued operations	—	—		1		—		—		1
Earnings (loss) from discontinued operations	—	—		(2	)	—		—		(2	)
Net earnings (loss)	304	302		260		72		(653	)	285
Net (earnings) loss attributable to noncontrolling interests	—	—		—		19		—		19
Net earnings (loss) attributable to Celanese Corporation	304	302		260		91		(653	)	304

Schedule of Consolidating Statements of Comprehensive Income (Loss)

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME (LOSS)

	Year Ended December 31, 2017
	Parent Guarantor		Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net earnings (loss)	843		843		768		687		(2,292	)	849
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	(1	)	(1	)	(1	)	(1	)	3		(1	)
Foreign currency translation	174		174		226		268		(668	)	174
Gain (loss) from cash flow hedges	(1	)	(1	)	(1	)	(1	)	3		(1	)
Pension and postretirement benefits	9		9		7		10		(26	)	9
Total other comprehensive income (loss), net of tax	181		181		231		276		(688	)	181
Total comprehensive income (loss), net of tax	1,024		1,024		999		963		(2,980	)	1,030
Comprehensive (income) loss attributable to noncontrolling interests	—		—		—		(6	)	—		(6	)
Comprehensive income (loss) attributable to Celanese Corporation	1,024		1,024		999		957		(2,980	)	1,024

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME (LOSS)

	Year Ended December 31, 2016
	Parent Guarantor		Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net earnings (loss)	900		898		855		736		(2,483	)	906
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	—		—		—		—		—		—
Foreign currency translation	(11	)	(11	)	(65	)	(73	)	149		(11	)
Gain (loss) from cash flow hedges	5		5		5		5		(15	)	5
Pension and postretirement benefits	(4	)	(4	)	(4	)	(2	)	10		(4	)
Total other comprehensive income (loss), net of tax	(10	)	(10	)	(64	)	(70	)	144		(10	)
Total comprehensive income (loss), net of tax	890		888		791		666		(2,339	)	896
Comprehensive (income) loss attributable to noncontrolling interests	—		—		—		(6	)	—		(6	)
Comprehensive income (loss) attributable to Celanese Corporation	890		888		791		660		(2,339	)	890

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME (LOSS)

	Year Ended December 31, 2015
	Parent Guarantor		Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net earnings (loss)	304		302		260		72		(653	)	285
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	—		—		—		—		—		—
Foreign currency translation	(188	)	(188	)	(181	)	(231	)	600		(188	)
Gain (loss) from cash flow hedges	2		2		5		1		(8	)	2
Pension and postretirement benefits	3		3		3		2		(8	)	3
Total other comprehensive income (loss), net of tax	(183	)	(183	)	(173	)	(228	)	584		(183	)
Total comprehensive income (loss), net of tax	121		119		87		(156	)	(69	)	102
Comprehensive (income) loss attributable to noncontrolling interests	—		—		—		19		—		19
Comprehensive income (loss) attributable to Celanese Corporation	121		119		87		(137	)	(69	)	121

Schedule of Consolidating Balance Sheets

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING BALANCE SHEET

	As of December 31, 2017
	Parent Guarantor	Issuer	Subsidiary Guarantors	Non- Guarantors	Eliminations		Consolidated
	(In $ millions)
ASSETS
Current Assets
Cash and cash equivalents	—	—	230	346	—		576
Trade receivables - third party and affiliates	—	—	89	988	(91	)	986
Non-trade receivables, net	38	482	279	385	(940	)	244
Inventories, net	—	—	277	672	(49	)	900
Marketable securities, at fair value	—	—	32	—	—		32
Other assets	—	60	12	93	(111	)	54
Total current assets	38	542	919	2,484	(1,191	)	2,792
Investments in affiliates	2,850	4,283	3,916	861	(10,934	)	976
Property, plant and equipment, net	—	—	1,145	2,617	—		3,762
Deferred income taxes	—	6	206	158	(4	)	366
Other assets	—	1,295	171	165	(1,293	)	338
Goodwill	—	—	314	689	—		1,003
Intangible assets, net	—	—	48	253	—		301
Total assets	2,888	6,126	6,719	7,227	(13,422	)	9,538
LIABILITIES AND EQUITY
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	—	76	148	369	(267	)	326
Trade payables - third party and affiliates	—	1	300	598	(92	)	807
Other liabilities	—	71	302	273	(292	)	354
Deferred income taxes	—	—	—	—	—		—
Income taxes payable	—	—	471	92	(491	)	72
Total current liabilities	—	148	1,221	1,332	(1,142	)	1,559
Noncurrent Liabilities
Long-term debt, net of unamortized deferred financing costs	—	3,128	1,254	233	(1,300	)	3,315
Deferred income taxes	—	—	—	215	(4	)	211
Uncertain tax positions	—	—	1	157	(2	)	156
Benefit obligations	—	—	277	308	—		585
Other liabilities	—	—	255	158	—		413
Total noncurrent liabilities	—	3,128	1,787	1,071	(1,306	)	4,680
Total Celanese Corporation stockholders' equity	2,888	2,850	3,711	4,412	(10,974	)	2,887
Noncontrolling interests	—	—	—	412	—		412
Total equity	2,888	2,850	3,711	4,824	(10,974	)	3,299
Total liabilities and equity	2,888	6,126	6,719	7,227	(13,422	)	9,538

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING BALANCE SHEET

	As of December 31, 2016
	Parent Guarantor	Issuer	Subsidiary Guarantors	Non- Guarantors	Eliminations		Consolidated
	(In $ millions)
ASSETS
Current Assets
Cash and cash equivalents	—	—	51	587	—		638
Trade receivables - third party and affiliates	—	—	107	819	(125	)	801
Non-trade receivables, net	40	499	249	308	(873	)	223
Inventories, net	—	—	239	526	(45	)	720
Marketable securities, at fair value	—	—	30	—	—		30
Other assets	—	42	25	76	(83	)	60
Total current assets	40	541	701	2,316	(1,126	)	2,472
Investments in affiliates	2,548	4,029	3,655	752	(10,132	)	852
Property, plant and equipment, net	—	—	1,049	2,528	—		3,577
Deferred income taxes	—	—	91	86	(18	)	159
Other assets	—	705	133	156	(687	)	307
Goodwill	—	—	314	482	—		796
Intangible assets, net	—	—	48	146	—		194
Total assets	2,588	5,275	5,991	6,466	(11,963	)	8,357
LIABILITIES AND EQUITY
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	—	6	133	250	(271	)	118
Trade payables - third party and affiliates	—	—	226	524	(125	)	625
Other liabilities	—	58	167	262	(165	)	322
Deferred income taxes	—	—	—	—	—		—
Income taxes payable	—	—	454	75	(517	)	12
Total current liabilities	—	64	980	1,111	(1,078	)	1,077
Noncurrent Liabilities
Long-term debt, net of unamortized deferred financing costs	—	2,647	727	210	(694	)	2,890
Deferred income taxes	—	16	—	132	(18	)	130
Uncertain tax positions	—	—	3	130	(2	)	131
Benefit obligations	—	—	636	257	—		893
Other liabilities	—	—	74	142	(1	)	215
Total noncurrent liabilities	—	2,663	1,440	871	(715	)	4,259
Total Celanese Corporation stockholders' equity	2,588	2,548	3,571	4,051	(10,170	)	2,588
Noncontrolling interests	—	—	—	433	—		433
Total equity	2,588	2,548	3,571	4,484	(10,170	)	3,021
Total liabilities and equity	2,588	5,275	5,991	6,466	(11,963	)	8,357

Schedule of Consolidating Cash Flow Statements

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF CASH FLOWS

	Year Ended December 31, 2017
	Parent Guarantor		Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net cash provided by (used in) operating activities	740		868		425		593		(1,823	)	803
Investing Activities
Capital expenditures on property, plant and equipment	—		—		(176	)	(91	)	—		(267	)
Acquisitions, net of cash acquired	—		(11	)	(12	)	(274	)	28		(269	)
Proceeds from sale of businesses and assets, net	—		—		9		20		(28	)	1
Capital expenditures related to Fairway Methanol LLC	—		—		—		—		—		—
Return of capital from subsidiary	—		16		241		—		(257	)	—
Contributions to subsidiary	—		—		—		—		—		—
Intercompany loan receipts (disbursements)	—		(530	)	(25	)	—		555		—
Other, net	—		—		(2	)	(12	)	—		(14	)
Net cash provided by (used in) investing activities	—		(525	)	35		(357	)	298		(549	)
Financing Activities
Short-term borrowings (repayments), net	—		56		15		51		(11	)	111
Proceeds from short-term borrowings	—		—		—		182		—		182
Repayments of short-term borrowings	—		—		—		(124	)	—		(124	)
Proceeds from long-term debt	—		351		530		14		(544	)	351
Repayments of long-term debt	—		(6	)	(2	)	(69	)	—		(77	)
Purchases of treasury stock, including related fees	(500	)	—		—		—		—		(500	)
Dividends to parent	—		(741	)	(802	)	(280	)	1,823		—
Contributions from parent	—		—		—		—		—		—
Stock option exercises	1		—		—		—		—		1
Series A common stock dividends	(241	)	—		—		—		—		(241	)
Return of capital to parent	—		—		—		(257	)	257		—
(Distributions to) contributions from noncontrolling interests	—		—		—		(27	)	—		(27	)
Other, net	—		(3	)	(22	)	(2	)	—		(27	)
Net cash provided by (used in) financing activities	(740	)	(343	)	(281	)	(512	)	1,525		(351	)
Exchange rate effects on cash and cash equivalents	—		—		—		35		—		35
Net increase (decrease) in cash and cash equivalents	—		—		179		(241	)	—		(62	)
Cash and cash equivalents as of beginning of period	—		—		51		587		—		638
Cash and cash equivalents as of end of period	—		—		230		346		—		576

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF CASH FLOWS

	Year Ended December 31, 2016
	Parent Guarantor		Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net cash provided by (used in) operating activities	695		711		(21	)	872		(1,364	)	893
Investing Activities
Capital expenditures on property, plant and equipment	—		—		(139	)	(107	)	—		(246	)
Acquisitions, net of cash acquired	—		—		—		(178	)	—		(178	)
Proceeds from sale of businesses and assets, net	—		—		1		11		—		12
Capital expenditures related to Fairway Methanol LLC	—		—		—		—		—		—
Return of capital from subsidiary	—		145		758		—		(903	)	—
Contributions to subsidiary	—		—		—		—		—		—
Intercompany loan receipts (disbursements)	—		(283	)	19		90		174		—
Other, net	—		—		(10	)	(17	)	—		(27	)
Net cash provided by (used in) investing activities	—		(138	)	629		(201	)	(729	)	(439	)
Financing Activities
Short-term borrowings (repayments), net	—		(371	)	1		(1	)	19		(352	)
Proceeds from short-term borrowings	—		—		—		53		—		53
Repayments of short-term borrowings	—		—		—		(90	)	—		(90	)
Proceeds from long-term debt	—		1,589		746		—		(826	)	1,509
Repayments of long-term debt	—		(1,083	)	(635	)	(42	)	633		(1,127	)
Purchases of treasury stock, including related fees	(500	)	—		—		—		—		(500	)
Dividends to parent	—		(695	)	(669	)	—		1,364		—
Contributions from parent	—		—		—		—		—		—
Stock option exercises	6		—		—		—		—		6
Series A common stock dividends	(201	)	—		—		—		—		(201	)
Return of capital to parent	—		—		—		(903	)	903		—
(Distributions to) contributions from noncontrolling interests	—		—		—		(24	)	—		(24	)
Other, net	—		(13	)	(21	)	1		—		(33	)
Net cash provided by (used in) financing activities	(695	)	(573	)	(578	)	(1,006	)	2,093		(759	)
Exchange rate effects on cash and cash equivalents	—		—		—		(24	)	—		(24	)
Net increase (decrease) in cash and cash equivalents	—		—		30		(359	)	—		(329	)
Cash and cash equivalents as of beginning of period	—		—		21		946		—		967
Cash and cash equivalents as of end of period	—		—		51		587		—		638

CELANESE CORPORATION AND SUBSIDIARIES

CONSOLIDATING STATEMENT OF CASH FLOWS

	Year Ended December 31, 2015
	Parent Guarantor		Issuer		Subsidiary Guarantors		Non- Guarantors		Eliminations		Consolidated
	(In $ millions)
Net cash provided by (used in) operating activities	591		536		529		422		(1,216	)	862
Investing Activities
Capital expenditures on property, plant and equipment	—		—		(128	)	(104	)	—		(232	)
Acquisitions, net of cash acquired	—		—		(3	)	(3	)	—		(6	)
Proceeds from sale of businesses and assets, net	—		—		—		4		—		4
Capital expenditures related to Fairway Methanol LLC	—		—		(20	)	(268	)	—		(288	)
Return of capital from subsidiary	—		—		—		—		—		—
Contributions to subsidiary	—		—		(120	)	—		120		—
Intercompany loan receipts (disbursements)	—		(333	)	(33	)	(15	)	381		—
Other, net	—		—		(12	)	(24	)	—		(36	)
Net cash provided by (used in) investing activities	—		(333	)	(316	)	(410	)	501		(558	)
Financing Activities
Short-term borrowings (repayments), net	—		383		—		—		(33	)	350
Proceeds from short-term borrowings	—		—		—		80		—		80
Repayments of short-term borrowings	—		—		—		(83	)	—		(83	)
Proceeds from long-term debt	—		15		406		—		(421	)	—
Repayments of long-term debt	—		(9	)	(74	)	(14	)	73		(24	)
Purchases of treasury stock, including related fees	(420	)	—		—		—		—		(420	)
Dividends to parent	—		(592	)	(624	)	—		1,216		—
Contributions from parent	—		—		—		120		(120	)	—
Stock option exercises	3		—		—		—		—		3
Series A common stock dividends	(174	)	—		—		—		—		(174	)
Return of capital to parent	—		—		—		—		—		—
(Distributions to) contributions from noncontrolling interests	—		—		—		214		—		214
Other, net	—		—		(10	)	(2	)	—		(12	)
Net cash provided by (used in) financing activities	(591	)	(203	)	(302	)	315		715		(66	)
Exchange rate effects on cash and cash equivalents	—		—		—		(51	)	—		(51	)
Net increase (decrease) in cash and cash equivalents	—		—		(89	)	276		—		187
Cash and cash equivalents as of beginning of period	—		—		110		670		—		780
Cash and cash equivalents as of end of period	—		—		21		946		—		967

XML

Description of the Company and Basis of Presentation (Narrative) (Details)	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Consolidated subsidiaries ownership percentage	100.00%

XML

Summary of Accounting Policies (Investments in Affiliates Narrative) (Details)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Subsidiary reporting period lag	one quarter

XML

Summary of Accounting Policies (Schedule of Estimated Useful Lives of Depreciable Assets) (Details)	12 Months Ended
	Dec. 31, 2017
Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	20 years
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	30 years
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	20 years
Maximum [Member] | Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	10 years

XML

Summary of Accounting Policies (Goodwill and Other Intangible Assets Narrative) (Details)	12 Months Ended
	Dec. 31, 2017
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, estimated useful lives	3 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, estimated useful lives	30 years

XML

Summary of Accounting Policies (Insurance Loss Reserves Narrative) (Details)	Dec. 31, 2017
Accounting Policies [Abstract]
Number of wholly-owned insurance companies	2

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Summary of Accounting Policies (Environmental Liabilities Narrative) (Details)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Environmental liabilities accrual period	15 years

XML

Summary of Accounting Policies (Pension and Other Postretirement Obligations) (Details)	Dec. 31, 2017
Accounting Policies [Abstract]
Number of Aa-grade non-callable bonds	300

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Summary of Accounting Policies Summary of Accounting Policies (Management Compensation Plans Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Jan. 01, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, par value		$ 0.0001
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Range of number of shares that will vest		zero to stretch
Director [Member] | RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		1 year
Employee [Member] | RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Series A common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, par value		$ 0.0001	$ 0.0001
Retained Earnings [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax	$ 1	$ (1)	$ 0	$ 0

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Summary of Accounting Policies (Income Taxes Narrative) (Details)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Valuation Allowance, Methodologies and Assumptions	A valuation allowance is provided when it is more likely than not (likelihood of greater than 50%) that some portion or all of the deferred tax assets will not be realized. Tax positions that meet the more-likely-than-not threshold are measured using a probability weighted approach as the largest amount of tax benefit that is greater than 50% likely of being realized upon settlement.

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Accounting Pronouncements (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ (44)	$ 41	$ 59
Subsequent Event [Member] | Accounting Standards Update 2016-01 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption				$ 1
Subsequent Event [Member] | Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption				$ 1

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Acquisitions, Dispositions and Plant Closures (Schedule of Business Acquisitions, by Acquisition) (Details) - USD ($)			12 Months Ended
		May 03, 2017	Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Business Acquisition, Goodwill, Expected Tax Deductible Amount		$ 0
Goodwill			$ 1,003,000,000	[1]	$ 796,000,000	$ 705,000,000
Advanced Engineered Materials [Member]
Business Acquisition [Line Items]
Goodwill			555,000,000	[1]	$ 385,000,000	$ 282,000,000
Nilit [Member]
Business Acquisition [Line Items]
Post-acquisition payment		29,000,000
Cash and cash equivalents		4,000,000
Trade receivables - third party and affiliates		21,000,000
Inventories		37,000,000
Property, plant and equipment, net		36,000,000
Intangible assets (Note 11)		104,000,000
Goodwill	[2]	136,000,000
Other assets(2)		11,000,000
Total fair value of assets acquired		349,000,000
Trade payables - third party and affiliates		(8,000,000)
Total debt (Note 14)		(12,000,000)
Deferred income taxes		(26,000,000)
Benefit obligations		(15,000,000)
Other liabilities(2)	[3]	(45,000,000)
Total fair value of liabilities assumed		(106,000,000)
Net assets acquired		$ 243,000,000
Business Combination, Acquisition Related Costs			3,000,000
Business Combination, Net Earnings as a Percent of Acquirer's Net earnings		1.00%
Nilit [Member] | Advanced Engineered Materials [Member]
Business Acquisition [Line Items]
Goodwill, Purchase Accounting Adjustments			(2,000,000)
SO.F.TER. S.p.A. [Member] | Advanced Engineered Materials [Member]
Business Acquisition [Line Items]
Goodwill, Purchase Accounting Adjustments			$ (6,000,000)

[1] There were $0 million of accumulated impairment losses as of December 31, 2017.

[2] Goodwill consists of expected revenue and operating synergies resulting from the acquisition. None of the goodwill is deductible for income tax purposes.

[3] Includes a $29 million acquisition payment to Nilit Group after the date of close, which was paid as of June 30, 2017.

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Acquisitions, Dispositions and Plant Closures Acquisition Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jun. 18, 2017	May 03, 2017	Dec. 01, 2016
Business Acquisition [Line Items]
Debt, Long-term and Short-term, Combined Amount		$ 3,661
Cash Dividends Paid to Parent Company		0	$ 0	$ 0
Nilit [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs		3
Business Combination, Net Earnings as a Percent of Acquirer's Net earnings						1.00%
Advanced Engineered Materials [Member] | Nilit [Member]
Business Acquisition [Line Items]
Goodwill, Purchase Accounting Adjustments		(2)
Advanced Engineered Materials [Member] | SO.F.TER. S.p.A. [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired							100.00%
Goodwill, Purchase Accounting Adjustments		$ (6)
Scenario, Plan [Member] | AcetateTowJointVenture [Member]
Business Acquisition [Line Items]
Debt, Long-term and Short-term, Combined Amount					$ 2,400
Proceeds from (Repayments of) Debt	$ 2,200
Scenario, Plan [Member] | Celanese [Member] | AcetateTowJointVenture [Member]
Business Acquisition [Line Items]
Acetate Tow JV Ownership Percentages		70.00%
Cash Dividends Paid to Parent Company	$ 1,600
Scenario, Plan [Member] | Blackstone [Member] | AcetateTowJointVenture [Member]
Business Acquisition [Line Items]
Acetate Tow JV Ownership Percentages		30.00%
Senior Secured JV Revolving Credit Facility [Member] | Scenario, Plan [Member] | AcetateTowJointVenture [Member]
Business Acquisition [Line Items]
Debt, Long-term and Short-term, Combined Amount					135
Senior Unsecured JV Revolving Credit Facility [Member] | Scenario, Plan [Member] | AcetateTowJointVenture [Member]
Business Acquisition [Line Items]
Debt, Long-term and Short-term, Combined Amount					65
Revolving Credit Facility [Member] | Scenario, Plan [Member] | AcetateTowJointVenture [Member]
Business Acquisition [Line Items]
Debt, Long-term and Short-term, Combined Amount					200
Senior Unsecured JV bridge facility [Member] | Scenario, Plan [Member] | AcetateTowJointVenture [Member]
Business Acquisition [Line Items]
Debt, Long-term and Short-term, Combined Amount					800
Senior Secured JV term loan [Member] | Scenario, Plan [Member] | AcetateTowJointVenture [Member]
Business Acquisition [Line Items]
Debt, Long-term and Short-term, Combined Amount					1,000
Senior Unsecured JV term loan facility [Member] | Scenario, Plan [Member] | AcetateTowJointVenture [Member]
Business Acquisition [Line Items]
Debt, Long-term and Short-term, Combined Amount					$ 400

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Acquisitions, Dispositions and Plant Closures (Plant Closure Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 01, 2015
Consumer Specialties [Member] | Lanaken, Belgium
Restructuring Cost and Reserve [Line Items]
Capacity Reduction Percentage	50.00%	50.00%
Research and Development Expense [Member] | Acetyl Intermediates [Member] | Clear Lake, TX [Member]
Restructuring Cost and Reserve [Line Items]
Other Depreciation and Amortization	$ 39

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Ventures and Variable Interest Entities (Schedule of Variable Interest Entities) (Details) - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Variable Interest Entity [Line Items]
Cash and cash equivalents		$ 576	$ 638	$ 967	$ 780
Trade receivables - third party and affiliates		986	801
Property, plant and equipment (net of accumulated depreciation - 2017: $90; 2016: $50)		3,762	3,577
Accumulated depreciation		2,584	2,239
Intangible assets, net		301	194
Accumulated amortization		591	524	$ 528
Other assets		338	307
Total assets		9,538	8,357
Trade payables		807	625
Current liabilities		1,559	1,077
Deferred income taxes		211	130
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Cash and cash equivalents		19	18
Trade receivables - third party and affiliates		5	4
Property, plant and equipment (net of accumulated depreciation - 2017: $90; 2016: $50)		697	734
Intangible assets, net		25	26
Other assets		6	9
Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Property, plant and equipment (net of accumulated depreciation - 2017: $90; 2016: $50)		53	60
Trade payables		25	53
Current installments of long-term debt		18	10
Long-term debt		76	91
Total liabilities		119	154
Maximum exposure to loss		164	240
Fairway Methanol LLC [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Cash and cash equivalents		19	18
Trade receivables - third party and affiliates		9	8
Property, plant and equipment (net of accumulated depreciation - 2017: $90; 2016: $50)		697	734
Accumulated depreciation		90	50
Intangible assets, net		25	26
Accumulated amortization		2	1
Other assets		6	9
Total assets	[1]	756	795
Trade payables		16	15
Current liabilities	[2]	4	2
Long-term debt		5	5
Deferred income taxes		3	2
Total liabilities		$ 28	$ 24

[1] Assets can only be used to settle the obligations of Fairway.

[2] Primarily represents amounts owed by Fairway to the Company for reimbursement of expenditures.

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Ventures and Variable Interest Entities (Narrative) (Details)	12 Months Ended
	Dec. 31, 2017
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Ownership percentage	50.00%

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Marketable Securities, at Fair Value (Schedule of Available-for-sale Securities) (Details) - Mutual Funds [Member] - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 32	$ 30
Gross unrealized gain	0	0
Gross unrealized loss	0	0
Fair value	$ 32	$ 30

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Receivables, Net Receivables, Net (Schedule of Trade Receivables - Third Party and Affiliates, Net) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Receivables [Abstract]
Trade receivables - third party and affiliates	$ 995	$ 807
Allowance for doubtful accounts - third party and affiliates	(9)	(6)
Trade receivables - third party and affiliates, net	$ 986	$ 801

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Receivables, Net Receivables, Net (Schedule of Non-trade Receivables, Net) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Receivables [Abstract]
Non-income taxes receivable	$ 81	$ 83
Reinsurance receivables	16	16
Income taxes receivable	64	43
Other	83	81
Non-trade receivables, net	$ 244	$ 223

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Inventories (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Finished goods	$ 591	$ 506
Work-in-process	57	45
Raw materials and supplies	252	169
Total	$ 900	$ 720

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Investments in Affiliates (Schedule of Equity Method Investments) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Carrying value		$ 817	$ 697
Share of earnings (loss)		183	155	$ 181
Dividends and other distributions		$ (131)	$ (131)	(176)
National Methonal Company (Ibn Sina) [Member] | Advanced Engineered Materials [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage		25.00%	25.00%
Carrying value		$ 178	$ 113
Share of earnings (loss)		58	38	88
Dividends and other distributions		$ (1)	$ (18)	(98)
Fortron Industries LLC [Member] | Advanced Engineered Materials [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage		50.00%	50.00%
Carrying value		$ 111	$ 100
Share of earnings (loss)		17	9	11
Dividends and other distributions		$ (6)	$ (9)	(8)
Korea Engineering Plastics Co., Ltd. [Member] | Advanced Engineered Materials [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage		50.00%	50.00%
Carrying value		$ 155	$ 137
Share of earnings (loss)		25	25	16
Dividends and other distributions		$ (25)	$ (11)	(10)
Polyplastics Co., Ltd. [Member] | Advanced Engineered Materials [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage		45.00%	45.00%
Carrying value		$ 170	$ 156
Share of earnings (loss)		57	50	35
Dividends and other distributions		$ (64)	$ (54)	(20)
InfraServ GmbH & Co. Gendorf KG [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage		39.00%
InfraServ GmbH & Co. Gendorf KG [Member] | Other Activities [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage	[1],[2]	39.00%	39.00%
Carrying value	[1],[2]	$ 41	$ 38
Share of earnings (loss)	[1],[2]	4	7	7
Dividends and other distributions	[1],[2]	$ (5)	$ (5)	(5)
InfraServ Gmbh & Co. Hoechst KG [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage		32.00%
InfraServ Gmbh & Co. Hoechst KG [Member] | Advanced Engineered Materials [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage	[3]	32.00%	0.00%
Carrying value	[3]	$ 139	$ 0
Share of earnings (loss)	[3]	19	0	0
Dividends and other distributions	[3]	$ (26)	$ 0	0
InfraServ Gmbh & Co. Hoechst KG [Member] | Other Activities [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage	[1],[3]	0.00%	32.00%
Carrying value	[1],[3]	$ 0	$ 132
Share of earnings (loss)	[1],[3]	0	22	21
Dividends and other distributions	[1],[3]	$ 0	$ (30)	(32)
InfraServ GmbH & Co. Knapsack KG [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage		27.00%
InfraServ GmbH & Co. Knapsack KG [Member] | Other Activities [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage	[1],[2]	27.00%	27.00%
Carrying value	[1],[2]	$ 20	$ 18
Share of earnings (loss)	[1],[2]	2	4	4
Dividends and other distributions	[1],[2]	$ (4)	$ (4)	(3)
Sherbrooke Capital Health and Wellness, L.P. [Member] | Consumer Specialties [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage	[4]	10.00%	10.00%
Carrying value	[4]	$ 3	$ 3
Share of earnings (loss)	[4]	1	0	(1)
Dividends and other distributions	[4]	$ 0	$ 0	$ 0

[1] InfraServ real estate service companies ("InfraServ Entities") own and operate sites in Frankfurt am Main-Hoechst, Gendorf and Knapsack, Germany. The InfraServ Entities were created to own land and property and to provide various technical and administrative services at these manufacturing locations.

[2] See Note 29 for further information.

[3] InfraServ GmbH & Co. Hoechst KG is owned primarily by an entity included in the Company's Advanced Engineered Materials segment. Prior to 2017, InfraServ GmbH & Co. Hoechst KG was owned primarily by an entity included in the Company's Other Activities segment. The Company's Consumer Specialties segment and Acetyl Intermediates segment also each hold an ownership percentage.

[4] The Company accounts for its ownership interest in Sherbrooke Capital Health and Wellness, L.P. under the equity method of accounting because the Company is able to exercise significant influence.

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Investments in Affiliates (Schedule of Cost Method Investments) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule of Cost-method Investments [Line Items]
Carrrying value	$ 159	$ 155
Dividend income	$ 108	$ 108	$ 107
Kunming Cellulose Fibers Co. Ltd. [Member] | Consumer Specialties [Member]
Schedule of Cost-method Investments [Line Items]
Ownership percentage	30.00%	30.00%
Carrrying value	$ 14	$ 14
Dividend income	$ 12	$ 14	14
Nantong Cellulose Fibers Co. Ltd. [Member] | Consumer Specialties [Member]
Schedule of Cost-method Investments [Line Items]
Ownership percentage	31.00%	31.00%
Carrrying value	$ 109	$ 106
Dividend income	$ 81	$ 80	79
Zhuhai Cellulose Fibers Co. Ltd. [Member] | Consumer Specialties [Member]
Schedule of Cost-method Investments [Line Items]
Ownership percentage	30.00%	30.00%
Carrrying value	$ 30	$ 30
Dividend income	$ 14	$ 13	13
InfraServ GmbH & Co. Wiesbaden KG [Member] | Other Activities [Member]
Schedule of Cost-method Investments [Line Items]
Ownership percentage	8.00%	8.00%
Carrrying value	$ 5	$ 5
Dividend income	1	1	1
Other Cost Method Investee [Member]
Schedule of Cost-method Investments [Line Items]
Carrrying value	1	0
Dividend income	$ 0	$ 0	$ 0

XML

Investments in Affiliates (Schedule of Transactions with Affiliates) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Purchases	$ 250	$ 203	$ 195
Sales	$ 0	$ 2	$ 0

XML

Investments in Affiliates (Schedule of Balances with Affiliates) (Details) - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Non-trade receivables		$ 21	$ 26
Total due from affiliates		21	26
Short-term borrowings	[1]	32	17
Trade payables		36	45
Current Other liabilities		8	8
Total due to affiliates		$ 76	$ 70

[1] The Company has agreements with certain affiliates whereby excess affiliate cash is lent to and managed by the Company at variable interest rates governed by those agreements.

XML

Property, Plant and Equipment, Net (Schedule of Property, Plant and Equipment, Net) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Gross asset value	$ 6,346	$ 5,816
Accumulated depreciation	(2,584)	(2,239)
Net book value	3,762	3,577
Land [Member]
Property, Plant and Equipment [Line Items]
Gross asset value	47	38
Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Gross asset value	72	70
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Gross asset value	758	695
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Gross asset value	5,101	4,753
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Gross asset value	$ 368	$ 260

XML

Property, Plant and Equipment, Net (Schedule of Assets Under Capital Leases) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Capital Leased Assets [Line Items]
Accumulated depreciation	$ (179)	$ (149)
Net book value	131	155
Buildings [Member]
Capital Leased Assets [Line Items]
Gross capital leased asset value	14	13
Machinery and Equipment [Member]
Capital Leased Assets [Line Items]
Gross capital leased asset value	$ 296	$ 291

XML

Property, Plant and Equipment, Net (Schedule of Capitalized Interest and Depreciation Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment, Net [Abstract]
Capitalized interest	$ 6	$ 5	$ 15
Depreciation expense	$ 285	$ 281	$ 346

XML

Goodwill and Intangible Assets, Net (Schedule of Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015
Goodwill
Acquisitions (Note 4)	$ 128		$ 106
Exchange rate changes	79		(15)
Accumulated impairment losses	0
Net book value	1,003	[1]	796	$ 705
Advanced Engineered Materials [Member]
Goodwill
Acquisitions (Note 4)	128		106
Exchange rate changes	42		(3)
Net book value	555	[1]	385	282
Consumer Specialties [Member]
Goodwill
Acquisitions (Note 4)	0		0
Exchange rate changes	12		(5)
Net book value	237	[1]	225	230
Industrial Specialties [Member]
Goodwill
Acquisitions (Note 4)	0		0
Exchange rate changes	2		(1)
Net book value	40	[1]	38	39
Acetyl Intermediates [Member]
Goodwill
Acquisitions (Note 4)	0		0
Exchange rate changes	23		(6)
Net book value	$ 171	[1]	$ 148	$ 154

[1] There were $0 million of accumulated impairment losses as of December 31, 2017.

XML

Goodwill and Intangible Assets, Net (Schedule of Finite-Lived Intangible Assets, Net) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Finite-Lived intangible Assets Rollforward
Acquisitions (Note 4)	$ 82	[1]	$ 67	[2]
Acquisitions (Note 5)	82	[1]	67	[2]
Exchange rate changes	62		(13)
Gross asset value	777		633		$ 579
Amortization	(20)		(9)		(11)
Exchange rate changes	(47)		13
Accumulated amortization	(591)		(524)		(528)
Net book value	186
Licenses [Member]
Finite-Lived intangible Assets Rollforward
Acquisitions (Note 4)	0		0
Acquisitions (Note 5)	0		0
Exchange rate changes	2		(2)
Gross asset value	38		36		38
Amortization	(4)		(3)
Exchange rate changes	(2)		1
Accumulated amortization	(33)		(27)		(25)
Net book value	5
Customer-Related Intangible Assets [Member]
Finite-Lived intangible Assets Rollforward
Acquisitions (Note 4)	73		64
Acquisitions (Note 5)	73		64
Exchange rate changes	58		(11)
Gross asset value	640		509		456
Amortization	(11)		(2)
Exchange rate changes	(45)		11
Accumulated amortization	(496)		(440)		(449)
Net book value	144
Developed Technology [Member]
Finite-Lived intangible Assets Rollforward
Acquisitions (Note 4)	9		0
Acquisitions (Note 5)	9		0
Exchange rate changes	1		0
Gross asset value	45		35		35
Amortization	(3)		(2)
Exchange rate changes	(1)		1
Accumulated amortization	(30)		(26)		(25)
Net book value	15
Covenants Not to Compete and Other [Member]
Finite-Lived intangible Assets Rollforward
Acquisitions (Note 4)	0		3
Acquisitions (Note 5)	0		3
Exchange rate changes	1		0
Gross asset value	54		53		50
Amortization	(2)		(2)
Exchange rate changes	1		0
Accumulated amortization	(32)		$ (31)		$ (29)
Net book value	$ 22
SO.F.TER. S.p.A. [Member]
Finite-Lived intangible Assets Rollforward
Weighted average life of intangible assets acquired			12 years
Nilit [Member]
Finite-Lived intangible Assets Rollforward
Weighted average life of intangible assets acquired	14 years

[1] Primarily related to intangible assets acquired from Nilit (Note 4) during the year ended December 31, 2017, with a weighted average amortization period of 14 years.

[2] Primarily related to intangible assets acquired from SOFTER (Note 4) during the year ended December 31, 2016, with a weighted average amortization period of 12 years.

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Goodwill and Intangible Assets, Net (Schedule of Indefinite-Lived Intangible Assets, Net) (Details) - Trademarks and Trade Names [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Gross Asset Value
Gross asset value	$ 85	$ 74
Acquisitions (Note 4)	22	12
Exchange rate changes	8	(1)
Gross asset value	$ 115	$ 85

XML

Goodwill and Intangible Assets, Net (Schedule of Estimated Amortization Expense) (Details) $ in Millions	Dec. 31, 2017 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2018	$ 19
2019	17
2020	15
2021	15
2022	$ 14

XML

Current Other Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Other Liabilities, Current [Abstract]
Asset retirement obligations	$ 19	$ 9
Benefit obligations (Note 15)	30	31
Customer rebates	65	51
Derivatives (Note 22)	3	3
Environmental (Note 16)	14	14
Insurance	5	6
Interest	17	15
Restructuring (Note 18)	5	16
Salaries and benefits	113	97
Sales and use tax/foreign withholding tax payable	16	21
Other	67	59
Total	$ 354	$ 322

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Noncurrent Other Liabilities (Schedule of Noncurrent Other Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Other Liabilities, Noncurrent [Abstract]
Asset retirement obligations	$ 7	$ 20
Deferred proceeds	47	41
Deferred revenue	6	9
Environmental (Note 16)	59	50
Income taxes payable (Note 19)	197	6
Insurance	43	46
Other	54	43
Total	$ 413	$ 215

XML

Noncurrent Other Liabilities (Schedule of Changes in Asset Retirement Obligations) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other Liabilities, Noncurrent [Abstract]
Balance at beginning of year		$ 29	$ 36	$ 37
Additions	[1]	0	2	0
Accretion		1	1	1
Payments		(5)	(10)	(4)
Revisions to cash flow estimates	[2]	1	0	2
Balance at end of year		$ 26	$ 29	$ 36

[1] Primarily relates to sites which management no longer considers to have an indeterminate life.

[2] Primarily relates to revisions to the estimated cost and timing of future obligations.

XML

Noncurrent Other Liabilities (Schedule of Changes in Asset Retirement Obligations Narrative) (Details) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Other Liabilities, Noncurrent [Abstract]
Asset retirement obligation, liability for assets or businesses acquired	$ 10	$ 10
Asset retirement obligation, recoveries long-term receivable noncurrent other assets	$ 10

XML

Debt (Schedule of Short-term Debt) (Details) - USD ($) $ in Millions		Dec. 31, 2017		Dec. 31, 2016
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates
Current installments of long-term debt		$ 63		$ 27
Short-term borrowings, including amounts due to affiliates	[1]	86		68
Total		$ 326		$ 118
Weighted average interest rate, short-term borrowings		2.80%		3.10%
Bank Loans Acquired from SOFTER [Member]
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates
Short-term SOFTER bank loans (Note 4)	[2]	$ 0		$ 23
Weighted average interest rate, short-term borrowings				1.20%
Revolving Credit Facility [Member]
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates
Line of Credit, Current	[4]	$ 97	[3]	$ 0
Weighted average interest rate, short-term borrowings		4.10%
Accounts Receivable Securitization Facility [Member]
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates
Line of Credit, Current	[6]	$ 80	[5]	$ 0
Weighted average interest rate, short-term borrowings		2.10%

[1] The weighted average interest rate was 2.8% and 3.1% as of December 31, 2017 and 2016, respectively.

[2] The weighted average interest rate was 1.2% as of December 31, 2016.

[3] The Company borrowed $528 million and repaid $431 million under its senior unsecured revolving credit facility during the year ended December 31, 2017

[4] The weighted average interest rate was 4.1% as of December 31, 2017.

[5] The Company borrowed $85 million and repaid $5 million during the year ended December 31, 2017.

[6] The weighted average interest rate was 2.1% as of December 31, 2017.

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Debt (Schedule of Long-term Debt) (Details) € in Millions, $ in Millions				12 Months Ended
		Dec. 31, 2017 USD ($)		Dec. 31, 2017 USD ($)		Dec. 11, 2017 EUR (€)	Dec. 31, 2016 USD ($)		Sep. 26, 2016 EUR (€)	Jul. 15, 2016 USD ($)	Dec. 31, 2015 USD ($)	[1]	Dec. 31, 2014 USD ($)
Long-Term Debt
Subtotal		$ 3,398		$ 3,398			$ 2,938
Unamortized debt issuance costs		(24)	[1]	(24)	[1]		(27)	[1]			$ (22)		$ (27)
Current installments of long-term debt		(63)		(63)			(27)
Total		3,315		$ 3,315			2,890
Debt Instrument, Redemption Price, Percentage				100.00%
Senior Unsecured Term Loan Due 2021 [Member]
Long-Term Debt
Secured Debt	[2]									$ 500
Senior unsecured notes	[2]	494		$ 494			500
Maturity Date				Jul. 15, 2021
Senior Unsecured Notes Due 2019 [Member]
Long-Term Debt
Senior unsecured notes		$ 360		$ 360			316
Maturity Date				Oct. 15, 2019
Interest Rate		3.25%		3.25%
Senior Unsecured Notes Due 2021 [Member]
Long-Term Debt
Senior unsecured notes		$ 400		$ 400			400
Maturity Date				Jun. 15, 2021
Interest Rate		5.875%		5.875%
Senior Unsecured Notes Due 2022 [Member]
Long-Term Debt
Senior unsecured notes		$ 500		$ 500			500
Maturity Date				Nov. 15, 2022
Interest Rate		4.625%		4.625%
Senior Unsecured Notes Due 2023 [Member]
Long-Term Debt
Senior unsecured notes		$ 897		$ 897			788
Maturity Date				Sep. 26, 2023
Interest Rate		1.125%		1.125%
Debt Instrument, Redemption Price, Percentage				100.00%
Long-term Debt, Gross | €									€ 750
Percentage of Face									99.713%
Senior Unsecured Notes Due 2025 [Member]
Long-Term Debt
Senior unsecured notes		$ 359		$ 359			0
Maturity Date				Dec. 11, 2025
Interest Rate		1.25%		1.25%
Debt Instrument, Redemption Price, Percentage				100.00%
Long-term Debt, Gross | €						€ 300
Percentage of Face						99.81%
Pollution Control and Industrial Revenue Bonds [Member]
Long-Term Debt
Year of maturity, range end				Nov. 01, 2030
Refunding loan for pollution control and industrial revenue bonds [Member]
Long-Term Debt
Pollution control and industrial revenue bonds due at various dates through 2030, interest rates ranging from 5.70% to 6.70%		$ 169		$ 169			$ 170
Year of maturity, range end				Dec. 31, 2030
Bank Loans Acquired from SOFTER [Member]
Debt Instrument [Line Items]
Long-term Debt, Weighted Average Interest Rate, at Point in Time							1.60%
Long-Term Debt
Pollution control and industrial revenue bonds due at various dates through 2030, interest rates ranging from 5.70% to 6.70%		$ 0	[3]	$ 0	[3]		$ 47
Year of maturity, range end		Dec. 31, 2021
Nilit [Member]
Debt Instrument [Line Items]
Long-term Debt, Weighted Average Interest Rate, at Point in Time		1.30%		1.30%
Long-Term Debt
Pollution control and industrial revenue bonds due at various dates through 2030, interest rates ranging from 5.70% to 6.70%		$ 11	[4]	$ 11	[4]		0
Obligations Under Capital Leases [Member]
Long-Term Debt
Year of maturity, range end				Mar. 31, 2054
Obligations under capital leases due at various dates through 2054		208		$ 208			217
Long-term Debt [Member]
Long-Term Debt
Unamortized debt issuance costs	[5]	$ (20)		$ (20)			$ (21)
Minimum [Member] | Pollution Control and Industrial Revenue Bonds [Member]
Long-Term Debt
Interest Rate		5.70%		5.70%
Minimum [Member] | Refunding loan for pollution control and industrial revenue bonds [Member]
Long-Term Debt
Interest Rate		4.05%		4.05%
Maximum [Member] | Pollution Control and Industrial Revenue Bonds [Member]
Long-Term Debt
Interest Rate		6.70%		6.70%
Maximum [Member] | Refunding loan for pollution control and industrial revenue bonds [Member]
Long-Term Debt
Interest Rate		5.00%		5.00%
London Interbank Offered Rate (LIBOR) [Member] | Senior Unsecured Term Loan Due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.50%

[1] Includes $4 million, $6 million and $4 million as of December 31, 2017, 2016 and 2015, respectively, related to the Company's revolving credit facility and accounts receivables securitization facility, which are included in noncurrent Other assets in the consolidated balance sheets.

[2] The margin for borrowings under the senior unsecured term loan due 2021 was 1.5% above LIBOR at current Celanese credit ratings.

[3] The weighted average interest rate was 1.6% as of December 31, 2016.

[4] The weighted average interest rate was 1.3% as of December 31, 2017.

[5] Related to the Company's long-term debt, excluding obligations under capital leases.

XML

Debt (Senior Credit Facilities Narrative) (Details) - USD ($) $ in Millions			12 Months Ended
		Sep. 26, 2016	Dec. 31, 2017	Jul. 15, 2016
Senior Unsecured Term Loan Due 2021 [Member]
Debt Instrument [Line Items]
Secured Debt	[1]			$ 500
Revolving Credit Facility [Member] | Senior Unsecured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity				$ 1,000
Proceeds from Lines of Credit			$ 528
Repayments of Lines of Credit		$ 411	$ 431

[1] The margin for borrowings under the senior unsecured term loan due 2021 was 1.5% above LIBOR at current Celanese credit ratings.

XML

Debt (Schedule of Balances Available for Borrowing) (Details) - USD ($) $ in Millions					12 Months Ended
		Dec. 31, 2017		Sep. 26, 2016	Dec. 31, 2017		Dec. 31, 2016
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Borrowings outstanding	[2]	$ 97	[1]		$ 97	[1]	$ 0
Letters of credit issued		0			0
Available for borrowing	[3]	$ 903			903
Revolving Credit Facility [Member] | Senior Unsecured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Proceeds from Lines of Credit					528
Repayments of Lines of Credit				$ 411	$ 431
London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member] | Senior Unsecured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.50%

[1] The Company borrowed $528 million and repaid $431 million under its senior unsecured revolving credit facility during the year ended December 31, 2017

[2] The weighted average interest rate was 4.1% as of December 31, 2017.

[3] The margin for borrowings under the senior unsecured revolving credit facility were 1.5% above LIBOR at current Company credit ratings.

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Debt Debt (Senior Notes Narrative) (Details) € in Millions, $ in Millions		12 Months Ended
	Sep. 26, 2016 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)		Dec. 31, 2015 USD ($)	Dec. 11, 2017 EUR (€)	Sep. 26, 2016 EUR (€)
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage		100.00%
Write off of Deferred Debt Issuance Cost		$ 0	$ 3	[1]	$ 0
Senior Unsecured Notes Due 2023 [Member]
Debt Instrument [Line Items]
Senior unsecured notes		$ 897	788
Debt Instrument, Redemption Price, Percentage		100.00%
Long-term Debt, Gross | €							€ 750
Percentage of Face							99.713%
Interest Rate		1.125%
Senior Unsecured Notes Due 2019 [Member]
Debt Instrument [Line Items]
Senior unsecured notes		$ 360	316
Interest Rate		3.25%
Senior Unsecured Notes Due 2025 [Member]
Debt Instrument [Line Items]
Senior unsecured notes		$ 359	$ 0
Debt Instrument, Redemption Price, Percentage		100.00%
Long-term Debt, Gross | €						€ 300
Percentage of Face						99.81%
Interest Rate		1.25%
Revolving Credit Facility [Member] | Senior Unsecured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Repayments of Lines of Credit	$ 411	$ 431

[1] Includes $2 million and $1 million related to the senior secured credit facilities and the pollution control and industrial revenue bonds, respectively, which are included in Refinancing expense in the consolidated statement of operations during the year ended December 31, 2016.

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Debt Debt (SOFTER Bank Loans Narrative) (Details) - USD ($) $ in Millions	1 Months Ended
	Jan. 31, 2017	Dec. 31, 2017
Debt Instrument [Line Items]
Debt, Long-term and Short-term, Combined Amount		$ 3,661
Bank Loans Acquired from SOFTER [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 69
Debt, Long-term and Short-term, Combined Amount		$ 70

XML

Debt Debt (Accounts Receivable Securitization Facility) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017		Dec. 31, 2016
Debt Instrument [Line Items]
Cash Flows Between Transferor and Transferee, Proceeds from New Transfers		$ 158
Accounts Receivable Securitization Facility [Member]
Debt Instrument [Line Items]
Line of Credit, Current	[2]	80	[1]	$ 0
Letters of credit issued		29
Available for borrowing		11
Line of Credit Facility, Current Borrowing Capacity		120
Line of Credit Facility, Maximum Borrowing Capacity	[3]	120
Secured Debt [Member] | Accounts Receivable Securitization Facility [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Debt		85
Repayments of Lines of Credit		$ 5

[1] The Company borrowed $85 million and repaid $5 million during the year ended December 31, 2017.

[2] The weighted average interest rate was 2.1% as of December 31, 2017.

[3] Outstanding accounts receivable transferred to the SPE was $158 million.

XML

Debt (Schedule of Principle Payments) (Details) $ in Millions	Dec. 31, 2017 USD ($)
Debt Disclosure [Abstract]
2018	$ 326
2019	437
2020	80
2021	794
2022	526
Thereafter	1,498
Total	$ 3,661

XML

Debt (Schedule of Net Deferred Financing Costs) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Debt Instrument [Line Items]
Deferred Finance Costs, Net		$ 27	[1]	$ 22	[1]	$ 27
Financing costs deferred		1	[2]	13	[3]	0
Accelerated amortization due to refinancing activity		0		(3)	[4]	0
Amortization		(4)		(5)		(5)
Deferred Finance Costs, Net	[1]	24		27		22
New Credit Agreement [Member]
Debt Instrument [Line Items]
Financing costs deferred	[3]			5
Senior Unsecured Notes Due 2023 [Member]
Debt Instrument [Line Items]
Financing costs deferred	[3]			6
Refunding loan for pollution control and industrial revenue bonds [Member]
Debt Instrument [Line Items]
Financing costs deferred	[3]			2
Amended Credit Agreement [Member]
Debt Instrument [Line Items]
Accelerated amortization due to refinancing activity	[4]			(2)
Pollution Control and Industrial Revenue Bonds [Member]
Debt Instrument [Line Items]
Accelerated amortization due to refinancing activity	[4]			(1)
Other Noncurrent Assets [Member] | RevolvingCreditandAccountsReceivableSecuritizationFacilities [Member]
Debt Instrument [Line Items]
Deferred Finance Costs, Net	[1]	6		4
Deferred Finance Costs, Net	[1]	$ 4		$ 6		$ 4

[1] Includes $4 million, $6 million and $4 million as of December 31, 2017, 2016 and 2015, respectively, related to the Company's revolving credit facility and accounts receivables securitization facility, which are included in noncurrent Other assets in the consolidated balance sheets.

[2] Related to the 1.250% Notes, which are being amortized through the term of the 1.250% Notes.

[3] Includes $5 million, $6 million and $2 million related to the Credit Agreement, the 1.125% Notes and the pollution control and industrial revenue bonds, respectively, all of which are being amortized through the term of the respective financing arrangement.

[4] Includes $2 million and $1 million related to the senior secured credit facilities and the pollution control and industrial revenue bonds, respectively, which are included in Refinancing expense in the consolidated statement of operations during the year ended December 31, 2016.

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Benefit Obligations (Schedule of Contributions to Multiemployer Defined Benefit Pension Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Retirement Benefits [Abstract]
Multiemployer defined benefit plan	$ 7	$ 7	$ 6

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Benefit Obligations (Schedule of Other Postemployment Obligations) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Retirement Benefits [Abstract]
Postemployment benefits	$ 8	$ 9

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Benefit Obligations Benefit Obligations (Schedule of Contributions to Defined Contribution Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Retirement Benefits [Abstract]
Defined contribution plans	$ 40	$ 43	$ 44

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Benefit Obligations (Schedule of Company's Pension and Post Retirement Benefit Plans) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Amounts Recognized in Accumulated Other Comprehensive Income Consist of:
Net amount recognized		$ (9)	$ 4	$ (3)
Other comprehensive (income) loss, tax effect		6	4
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Benefits Paid	[1]	(233)	(232)
Change in Projected Benefit Obligation
Projected benefit obligation as of beginning of period		3,610	3,635
Service cost		9	8	12
Interest cost		107	113	139
Participant contributions		0	0
Plan amendments		0	0
Net actuarial (gain) loss	[2]	151	102
Defined Benefit Plan, Benefit Obligation, Divestiture		0	0
Settlements		(1)	(1)
Defined Benefit Plan, Benefit Obligation, Benefits Paid		(233)	(232)
Federal subsidy on Medicare Part D		0	0
Curtailments		0	0
Special termination benefits		1	3
Exchange rate changes		69	(18)
Other	[3]	15	0
Projected benefit obligation as of end of period		3,728	3,610	3,635
Change in Plan Assets
Fair value of plan assets as of beginning of period		2,784	2,508
Actual return on plan assets		302	177
Employer contributions		359	346
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant		0	0
Settlements		(1)	(1)
Exchange rate changes		40	(14)
Fair value of plan assets as of end of period		3,251	2,784	2,508
Funded status as of end of period		(477)	(826)
Amounts Recognized in the Consolidated Balance Sheets Consist of:
Noncurrent Other assets		64	22
Current Other liabilities		(24)	(25)
Benefit obligations		(517)	(823)
Net amount recognized		(477)	(826)
Amounts Recognized in Accumulated Other Comprehensive Income Consist of:
Net actuarial (gain) loss	[4]	9	18
Prior service (benefit) cost		(1)	(1)
Net amount recognized	[5]	8	17
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Benefits Paid	[1]	(4)	(4)
Change in Projected Benefit Obligation
Projected benefit obligation as of beginning of period		67	66
Service cost		1	0	1
Interest cost		1	2	3
Participant contributions		0	0
Plan amendments		0	0
Net actuarial (gain) loss	[2]	(2)	3
Defined Benefit Plan, Benefit Obligation, Divestiture		0	0
Settlements		0	0
Defined Benefit Plan, Benefit Obligation, Benefits Paid		(4)	(4)
Federal subsidy on Medicare Part D		0	0
Curtailments		0	0
Special termination benefits		0	0
Exchange rate changes		3	0
Other	[3]	0	0
Projected benefit obligation as of end of period		66	67	66
Change in Plan Assets
Fair value of plan assets as of beginning of period		0	0
Actual return on plan assets		0	0
Employer contributions		4	4
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant		0	0
Settlements		0	0
Exchange rate changes		0	0
Fair value of plan assets as of end of period		0	0	$ 0
Funded status as of end of period		(66)	(67)
Amounts Recognized in the Consolidated Balance Sheets Consist of:
Noncurrent Other assets		0	0
Current Other liabilities		(5)	(5)
Benefit obligations		(61)	(62)
Net amount recognized		(66)	(67)
Amounts Recognized in Accumulated Other Comprehensive Income Consist of:
Net actuarial (gain) loss	[4]	0	0
Prior service (benefit) cost		1	(1)
Net amount recognized	[5]	1	(1)
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Benefits Paid		$ (22)	$ (22)

[1] Includes benefit payments to nonqualified pension plans of $22 million and $22 million as of December 31, 2017 and 2016, respectively.

[2] Primarily relates to change in discount rates.

[3] Primarily relates to the acquisition of Nilit (Note 4).

[4] Relates to the pension plans of the Company's equity method investments.

[5] Amount shown net of an income tax benefit of $6 million and $4 million as of December 31, 2017 and 2016, respectively, in the consolidated statements of equity (Note 17).

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Benefit Obligations (Schedule of Percentage of US and International Projected Benefit Obligation) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Benefits Paid	$ 233	$ 232
Percentage of projected benefit obligation	100.00%	100.00%
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Benefits Paid	$ 4	$ 4
Percentage of projected benefit obligation	100.00%	100.00%
Domestic Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of projected benefit obligation	83.00%	85.00%
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of projected benefit obligation	54.00%	57.00%
Foreign Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of projected benefit obligation	17.00%	15.00%
Foreign Plan [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of projected benefit obligation	46.00%	43.00%

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Benefit Obligations (Schedule of Percentage of US and International Fair Value of Plan Assets) (Details)	Dec. 31, 2017	Dec. 31, 2016
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Assets Percentage	100.00%	100.00%
Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Assets Percentage	88.00%	88.00%
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Assets Percentage	12.00%	12.00%

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Benefit Obligations (Schedule of Pension Plans with Projected Benefit Obligations in Excess of Plan Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Retirement Benefits [Abstract]
Projected benefit obligation	$ 882	$ 3,559
Fair value of plan assets	$ 341	$ 2,711

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Benefit Obligations (Schedule of Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Retirement Benefits [Abstract]
Accumulated benefit obligation	$ 861	$ 3,538
Fair value of plan assets	$ 338	$ 2,708

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Benefit Obligations (Schedule of Accumulated Benefit Obligation for All Defined Benefit Pension Plans) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Retirement Benefits [Abstract]
Accumulated benefit obligation	$ 3,710	$ 3,591

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Benefit Obligations (Schedule of Net Periodic Benefit Costs Recognized) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Recognized actuarial (gain) loss	$ 46	$ 103	$ 127
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	9	8	12
Interest cost	107	113	139
Expected return on plan assets	(198)	(177)	(209)
Amortization of prior service cost / (credit)	0	0	0
Recognized actuarial (gain) loss	48	101	134
Curtailment (gain) loss	0	0	(3)
Settlement (gain) loss	0	0	0
Special termination benefit	1	3	2
Total	(33)	48	75
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	0	1
Interest cost	1	2	3
Expected return on plan assets	0	0	0
Amortization of prior service cost / (credit)	(1)	(3)	0
Recognized actuarial (gain) loss	(2)	2	(7)
Curtailment (gain) loss	0	0	0
Settlement (gain) loss	0	0	0
Special termination benefit	0	0	0
Total	$ (1)	$ 1	$ (3)

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Benefit Obligations (Schedule of Amortization of Accumulated Other Comprehensive Income (Loss), Net Into Net Periodic Benefit Cost) (Details) $ in Millions	Dec. 31, 2017 USD ($)
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Prior service cost	$ 0
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Prior service cost	$ 0

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Benefit Obligations (Schedule of Nonqualified Pension Plans Funded with Nonqualified Trusts) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Noncurrent Other assets, consisting of insurance contracts	$ 42	$ 49
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Noncurrent Other assets, consisting of insurance contracts	42	49
Current Other liabilities	22	22
Benefit obligations	237	241
Supplemental Employee Retirement Plan [Member] | Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Marketable securities, at fair value	$ 32	$ 30

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Benefit Obligations (Schedule of Expense Related to Nonqualified Pension Plans Included in Net Periodic Benefit Cost, Excluding Returns on Assets) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total		$ (33)	$ 48	$ 75
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total		(1)	1	(3)
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	[1]	$ 18	$ 18	$ 0

[1] Actuarial gain offset interest cost.

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Benefit Obligations (Pension and Other Postretirement Obligations Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Pension and postretirement net periodic benefit cost	$ (80)	$ (54)	$ (52)
Multiemployer plans, funded status	At least 80 percent	At least 80 percent	At least 80 percent
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Settlement gain (loss)	$ 0	$ 0	$ 0
Curtailment gain (loss)	0	0	3
Amortization of prior service cost (credit)	0	0	0
Lump-sum buyout payments	1	1
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Settlement gain (loss)	0	0	0
Curtailment gain (loss)	0	0	0
Amortization of prior service cost (credit)	(1)	(3)	$ 0
Lump-sum buyout payments	$ 0	0
Change in Assumptions for Defined Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and postretirement net periodic benefit cost		$ 29

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Benefit Obligations (Schedule of Principle Weighted Average Assumptions Used to Determine Benefit Obligations and Benefit Cost) (Details)		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate obligations		3.30%	3.70%
Rate of compensation increase		2.80%	2.80%
Discount rate NPBC		3.70%	4.00%	3.70%
Discount rate NPBC - service cost	[1]	2.50%	3.10%	3.70%
Discount rate NPBC - interest cost	[1]	3.10%	3.20%	3.70%
Expected return on plan assets		7.30%	7.30%	7.80%
Rate of compensation increase NPBC		2.80%	2.70%	2.80%
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate obligations		3.20%	3.40%
Discount rate NPBC		3.40%	3.90%	3.60%
Discount rate NPBC - service cost	[1]	2.90%	3.80%	3.60%
Discount rate NPBC - interest cost	[1]	2.90%	3.10%	3.60%
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase		2.80%	2.80%
Expected return on plan assets		5.90%	6.10%	6.00%
Rate of compensation increase NPBC		2.80%	2.70%	2.80%
Foreign Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate obligations		2.10%	2.10%
Discount rate NPBC		2.10%	2.60%	2.40%
Discount rate NPBC - service cost	[1]	2.50%	3.10%	2.40%
Discount rate NPBC - interest cost	[1]	1.70%	2.20%	2.40%
Foreign Plan [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate obligations		3.20%	3.30%
Discount rate NPBC		3.30%	3.60%	3.50%
Discount rate NPBC - service cost	[1]	3.40%	3.80%	3.50%
Discount rate NPBC - interest cost	[1]	2.90%	3.10%	3.50%
Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets		7.50%	7.50%	8.00%
Domestic Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate obligations		3.50%	3.90%
Discount rate NPBC		3.90%	4.20%	3.90%
Discount rate NPBC - service cost	[1]	1.20%	4.50%	3.90%
Discount rate NPBC - interest cost	[1]	3.30%	3.40%	3.90%
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate obligations		3.40%	3.80%
Discount rate NPBC		3.80%	4.00%	3.70%
Discount rate NPBC - service cost	[1]	4.00%	4.20%	3.70%
Discount rate NPBC - interest cost	[1]	3.10%	3.10%	3.70%

[1] eighted-average discount rates reflect the adoption of the full yield curve approach.

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Benefit Obligations Benefit Obligations (Schedule of US Health Care Cost Trend Rates) (Details) - Domestic Plan [Member] - Postretirement Health Coverage [Member]	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
ScheduleofHealthCareCostTrend [Line Items]
Health care cost trend rate assumed for next year	9.00%	9.50%	10.00%
Health care cost trend ultimate rate	5.00%	5.00%	5.00%
Health care cost trend ultimate rate year	2026	2026	2026

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Benefit Obligations (Schedule of Impact of One-Percentage-Point Change in Assumed Health Care Cost Trend) (Details) - Other Postretirement Benefits Plan [Member] - Domestic Plan [Member] $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Postretirement obligations, impact of 1% decrease	$ 2
Postretirement obligations, impact of 1% increase	2
Service and interest cost, impact of 1% decrease	0
Service and interest cost, impact of 1% increase	$ 0

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Benefit Obligations (Valuation Narrative) (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets	7.30%	7.30%	7.80%

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Benefit Obligations (Schedule of Weighted Average Target Asset Allocations) (Details)	Dec. 31, 2017
Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	100.00%
Domestic Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	75.00%
Domestic Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	8.00%
Domestic Plan [Member] | Equity Securities International To Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	7.00%
Domestic Plan [Member] | Other Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	10.00%
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	100.00%
Foreign Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	59.00%
Foreign Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	16.00%
Foreign Plan [Member] | Equity Securities International To Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	0.00%
Foreign Plan [Member] | Other Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	25.00%

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Benefit Obligations (Schedule of Fair Values of Pension Plan Assets) (Details) - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets, fair value non-financial receivables		$ 25	$ 20
Pension plan assets, fair value non-financial payables		18	10
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets	[1]	(2,361)	(2,296)
Total liabilities [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		7	3
Swaps [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		7	2
Other [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		0	1
Total plan assets [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets	[2]	(2,368)	(2,299)
Cash and Cash quivalents [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(5)	(2)
Equities [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(727)	(195)
Swaps [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(8)	(2)
US Companies [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		0	(260)
International Companies [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(72)	(345)
Corporate Debt [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(776)	(798)
Treasuries, Other Debt [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(1,459)	(830)
Mortgage Backed Securities [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(7)	(7)
Registered Investment Companies [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(60)	(134)
Short-term Investments [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(96)	(149)
Insurance Contracts [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(36)	(31)
Other [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(5)	(24)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets	[1]	(129)	(668)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Total liabilities [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Swaps [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Other [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Total plan assets [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets	[2]	(129)	(668)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Cash and Cash quivalents [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(5)	(2)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Swaps [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | US Companies [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		0	(260)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | International Companies [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(72)	(345)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Corporate Debt [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Treasuries, Other Debt [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(48)	(37)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Mortgage Backed Securities [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Insurance Contracts [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Other [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(4)	(24)
Significant Other Observable Inputs (Level 2) [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets	[1]	(2,232)	(1,628)
Significant Other Observable Inputs (Level 2) [Member] | Total liabilities [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		7	3
Significant Other Observable Inputs (Level 2) [Member] | Swaps [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		7	2
Significant Other Observable Inputs (Level 2) [Member] | Other [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		0	1
Significant Other Observable Inputs (Level 2) [Member] | Total plan assets [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets	[2]	(2,239)	(1,631)
Significant Other Observable Inputs (Level 2) [Member] | Cash and Cash quivalents [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		0	0
Significant Other Observable Inputs (Level 2) [Member] | Swaps [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(8)	(2)
Significant Other Observable Inputs (Level 2) [Member] | US Companies [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		0	0
Significant Other Observable Inputs (Level 2) [Member] | International Companies [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		0	0
Significant Other Observable Inputs (Level 2) [Member] | Corporate Debt [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(776)	(798)
Significant Other Observable Inputs (Level 2) [Member] | Treasuries, Other Debt [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(1,411)	(793)
Significant Other Observable Inputs (Level 2) [Member] | Mortgage Backed Securities [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(7)	(7)
Significant Other Observable Inputs (Level 2) [Member] | Insurance Contracts [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(36)	(31)
Significant Other Observable Inputs (Level 2) [Member] | Other [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		$ (1)	$ 0

[1] Total net assets excludes non-financial plan receivables and payables of $25 million and $18 million, respectively, as of December 31, 2017 and $20 million and $10 million, respectively, as of December 31, 2016. Non-financial items include due to/from broker, interest receivables and accrued expenses.

[2] In accordance with ASU 2015-07 (Note 2), certain investments that are measured at fair value using the NAV per share practical expedient have not been classified in the fair value hierarchy. Total investments, at fair value, for the year ended December 31, 2017 excludes investments in common/collective trusts, registered investment companies and short-term investment funds with fair values of $727 million, $60 million and $96 million, respectively. Total investments, at fair value, for the year ended December 31, 2016 excludes investments in common/collective trusts, registered investment companies and short-term investment funds with fair values of $195 million, $134 million and $149 million, respectively.

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Benefit Obligations Benefit Obligations (Schedule of Pension Contributions Expected to be Contributed to the Plans) (Details) $ in Millions	Dec. 31, 2017 USD ($)
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 23
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	5
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 21

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Benefit Obligations (Schedule of Pension Benefits Expected to be Paid from the Plans or From the Company's Assets) (Details) $ in Millions	Dec. 31, 2017 USD ($)
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
2018	$ 235	[1]
2019	233	[1]
2020	231	[1]
2021	227	[1]
2022	224	[1]
2023-2027	1,090	[1]
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
2018	5	[2]
2019	5	[2]
2020	4	[2]
2021	4	[2]
2022	4	[2]
2023-2027	$ 18	[2]

[1] Payments are expected to be made primarily from plan assets.

[2] Payments are expected to be made primarily from Company assets.

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Benefit Obligations (Plan Assets Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets		7.30%	7.30%	7.80%
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year		$ 23
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year		$ 5
Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets		11.40%
Expected return on plan assets		7.50%	7.50%	8.00%
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets		5.90%	6.10%	6.00%
Scenario, Forecast [Member] | Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets	6.80%

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Environmental (Schedule of Environmental Remediation Reserves) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Environmental Remediation Obligations [Abstract]
Demerger obligations (Note 24)	$ 28	$ 18
Divestiture obligations (Note 24)	17	16
Active sites	15	16
US Superfund sites	11	11
Other environmental remediation reserves	2	3
Total	$ 73	$ 64

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Environmental (Remediation Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Spondon, UK, Former Owner [Member] | Consumer Specialties [Member]
Environmental Disclosure [Line Items]
Environmental insurance recoveries receivable	$ 3	$ 2

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Environmental (Schedule of Environmental Ownership and Liability Percentages) (Details) - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016
Environmental Disclosure [Line Items]
Reserves		$ 73	$ 64
InfraServ GmbH & Co. Gendorf KG [Member]
Environmental Disclosure [Line Items]
Ownership percentage		39.00%
Liability percentage		10.00%
Reserves	[1]	$ 9
InfraServ Gmbh & Co. Hoechst KG [Member]
Environmental Disclosure [Line Items]
Ownership percentage		32.00%
Liability percentage		40.00%
Reserves	[1]	$ 71
InfraServ GmbH & Co. Knapsack KG [Member]
Environmental Disclosure [Line Items]
Ownership percentage		27.00%
Liability percentage		22.00%
Reserves	[1]	$ 1

[1] Gross reserves maintained by the respective InfraServ entity.

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Environmental (German Infraservs Narrative) (Details)	Dec. 31, 2017
Environmental Remediation Obligations [Abstract]
Demerger obligations indemnification percentage	66.66%
Other demerger obligations indemnification percentage	66.66%

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Environmental Environmental (US Superfund Sites Narrative) (Details) - Passaic River, New Jersey [Member] $ in Billions		12 Months Ended
	Mar. 03, 2016 USD ($)	Dec. 31, 2017
Site Contingency [Line Items]
Number of Parties included in USEPA order		70
EPA Estimated Cost	$ 1.4
Environmental Liability Percentage		1.00%

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Stockholders' Equity (Schedule of Dividend Increases) (Details) - $ / shares	1 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2015
Schedule of Dividend Increases [Line Items]
Percent increase in common stock dividend	28.00%	20.00%	20.00%
Common Stock, Dividends, Per Share, Board Increase Announcement, Quarterly	$ 0.46	$ 0.36	$ 0.30
Common stock, Dividends, Per Share, Board Increase Announcement, Annual	$ 1.84	$ 1.44	$ 1.20

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Stockholders' Equity (Schedule of Treasury Stock) (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended				119 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015		Dec. 31, 2017
Class of Stock [Line Items]
Share repurchase plan, authorized repurchase amount	[1]	$ 3,866				$ 3,866
Shares repurchased		5,436,803	7,034,420	6,640,601	[2]	39,779,019
Average purchase price per share		$ 91.97	$ 71.08	$ 63.31		$ 58.71
Amount spent on repurchased shares (in millions)		$ 500	$ 500	$ 420		$ 2,335
Aggregate Board of Directors repurchase authorizations during the period	[1]	$ 1,500	$ 0	$ 1,000
Restricted Stock [Member]
Class of Stock [Line Items]
Shares withheld, tax withholding				9,264

[1] These authorizations give management discretion in determining the timing and conditions under which shares may be repurchased. This repurchase program began in February 2008 and does not have an expiration date.

[2] The year ended December 31, 2015 excludes 9,264 shares withheld from an executive officer to cover statutory minimum withholding requirements for personal income taxes related to the vesting of restricted stock. Restricted stock awards are considered outstanding at the time of issuance. Accordingly, the shares withheld are treated as treasury shares.

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Stockholders' Equity (Schedule of Components of Other Comprehensive Income (Loss), Net) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Comprehensive Income (Loss) [Line Items]
Unrealized gain (loss) on marketable securities, gross amount	$ 0	$ 0	$ 0
Unrealized gain (loss) on marketable securities, income tax (provision) benefit	(1)	0	0
Unrealized gain (loss) on marketable securities, net amount	(1)	0	0
Foreign currency translation, gross amount	162	(22)	(193)
Foreign currency translation, income tax (provision) benefit	12	11	5
Foreign currency translation, net amount	174	(11)	(188)
Gain (loss) on cash flow hedges, gross amount	0	5	3
Gain (loss) on cash flow hedges, income tax (provision) benefit	(1)	0	(1)
Gain (loss) on cash flow hedges, net amount	(1)	5	2
Pension and postretirement benefits, gross amount	7	(5)	4
Pension and postretirement benefits, income tax (provision) benefit	2	1	(1)
Pension and postretirement benefits, net amount	9	(4)	3
Total other comprehensive income (loss), gross amount	169	(22)	(186)
Total other comprehensive income (loss), income tax (provision) benefit	12	12	3
Total other comprehensive income (loss), net of tax	$ 181	$ (10)	$ (183)

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Stockholders' Equity (Schedule of Adjustments to Accumulated Other Comprehensive Income (Loss), Net) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of the beginning of the period	$ (358)	$ (348)	$ (165)
Other comprehensive income (loss) before reclassifications	174	(18)	(189)
Amounts reclassified from accumulated other comprehensive income (loss)	(5)	(4)	3
Income tax (provision) benefit	12	12	3
Balance as of the end of the period	(177)	(358)	(348)
Unrealized Gain (Loss) on Marketable Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of the beginning of the period	1	1	1
Other comprehensive income (loss) before reclassifications	0	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0
Income tax (provision) benefit	(1)	0	0
Balance as of the end of the period	0	1	1
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of the beginning of the period	(350)	(339)	(151)
Other comprehensive income (loss) before reclassifications	162	(22)	(193)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0
Income tax (provision) benefit	12	11	5
Balance as of the end of the period	(176)	(350)	(339)
Gain (Loss) from Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of the beginning of the period	3	(2)	(4)
Other comprehensive income (loss) before reclassifications	4	7	(2)
Amounts reclassified from accumulated other comprehensive income (loss)	(4)	(2)	5
Income tax (provision) benefit	(1)	0	(1)
Balance as of the end of the period	2	3	(2)
Pension and Postretirement Benefits [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of the beginning of the period	(12)	(8)	(11)
Other comprehensive income (loss) before reclassifications	8	(3)	6
Amounts reclassified from accumulated other comprehensive income (loss)	(1)	(2)	(2)
Income tax (provision) benefit	2	1	(1)
Balance as of the end of the period	$ (3)	$ (12)	$ (8)

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Stockholders' Equity (Narrative) (Details) - Subsequent Event [Member] $ / shares in Units, $ in Millions	Feb. 08, 2018 USD ($) $ / shares
Equity, Class of Treasury Stock [Line Items]
Quarterly cash dividend per share | $ / shares	$ 0.46
Cash dividend | $	$ 62

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Other (Charges) Gains, Net (Schedule of Other (Charges) Gains, Net) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Impairment of equity method investment		$ 4		$ 0		$ 0
Other plant/office closures		(52)		0		0
Asset impairments		0		(2)		(126)
Employee termination benefits (Note 4)(1)		(4)	[1]	(11)	[1]	(53)
Other (charges) gains, net		(60)		(11)		(351)
Singapore contract termination		0		0		(174)
Commercial disputes		0		2		$ 2
Acetyl Intermediates [Member]
Restructuring Cost and Reserve [Line Items]
Other plant/office closures		(51)
Acetyl Intermediates [Member] | Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Other plant/office closures		(22)
Acetyl Intermediates [Member] | Non-income tax receivable adjustment [Member]
Restructuring Cost and Reserve [Line Items]
Other plant/office closures		(21)
Pension Plan [Member]
Restructuring Cost and Reserve [Line Items]
Special Termination Benefits recorded in Benefit Obligations		$ 1		$ 3
InfraServ GmbH & Co. Knapsack KG [Member]
Restructuring Cost and Reserve [Line Items]
Equity Method Investment, Ownership Percentage		27.00%
InfraServ GmbH & Co. Knapsack KG [Member] | Other Activities [Member]
Restructuring Cost and Reserve [Line Items]
Equity Method Investment, Ownership Percentage	[2],[3]	27.00%		27.00%
InfraServ GmbH & Co. Gendorf KG [Member]
Restructuring Cost and Reserve [Line Items]
Equity Method Investment, Ownership Percentage		39.00%
InfraServ GmbH & Co. Gendorf KG [Member] | Other Activities [Member]
Restructuring Cost and Reserve [Line Items]
Equity Method Investment, Ownership Percentage	[2],[3]	39.00%		39.00%
InfraServ GmbH & Co. Knapsack KG and InfraServ GmbH & Co. Gendorf KG [Member] | Other Activities [Member]
Restructuring Cost and Reserve [Line Items]
Impairment of equity method investment		$ 4

[1] Includes $1 million and $3 million of special termination benefits included in Benefit obligations in the consolidated balance sheet as of December 31, 2017 and 2016, respectively.

[2] InfraServ real estate service companies ("InfraServ Entities") own and operate sites in Frankfurt am Main-Hoechst, Gendorf and Knapsack, Germany. The InfraServ Entities were created to own land and property and to provide various technical and administrative services at these manufacturing locations.

[3] See Note 29 for further information.

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Other (Charges) Gains, Net (Schedule of Restructuring Reserves) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Reserve as of the end of the period	$ 5
Total	5
Employee Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Reserve as of the beginning of the period	16	$ 30
Additions	4	10
Cash payments	(8)	(21)
Other changes	(9)	(2)
Exchange rate changes	0	(1)
Reserve as of the end of the period	3	16
Total	16	30
Plant/Office Closures [Member]
Restructuring Cost and Reserve [Line Items]
Reserve as of the beginning of the period	0	0
Additions	29	0
Cash payments	(24)	0
Other changes	(3)	0
Exchange rate changes	0	0
Reserve as of the end of the period	2	0
Total	0	0
Advanced Engineered Materials [Member]
Restructuring Cost and Reserve [Line Items]
Reserve as of the end of the period	1
Total	1
Advanced Engineered Materials [Member] | Employee Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Reserve as of the beginning of the period	1	3
Additions	1	2
Cash payments	(1)	(3)
Other changes	0	(1)
Exchange rate changes	0	0
Reserve as of the end of the period	1	1
Total	1	3
Advanced Engineered Materials [Member] | Plant/Office Closures [Member]
Restructuring Cost and Reserve [Line Items]
Reserve as of the beginning of the period	0	0
Additions	0	0
Cash payments	0	0
Other changes	0	0
Exchange rate changes	0	0
Reserve as of the end of the period	0	0
Total	0	0
Consumer Specialties [Member]
Restructuring Cost and Reserve [Line Items]
Reserve as of the end of the period	0
Total	0
Consumer Specialties [Member] | Employee Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Reserve as of the beginning of the period	9	14
Additions	2	2
Cash payments	(3)	(6)
Other changes	(8)	0
Exchange rate changes	0	(1)
Reserve as of the end of the period	0	9
Total	9	14
Consumer Specialties [Member] | Plant/Office Closures [Member]
Restructuring Cost and Reserve [Line Items]
Reserve as of the beginning of the period	0	0
Additions	0	0
Cash payments	0	0
Other changes	0	0
Exchange rate changes	0	0
Reserve as of the end of the period	0	0
Total	0	0
Industrial Specialties [Member]
Restructuring Cost and Reserve [Line Items]
Reserve as of the end of the period	0
Total	0
Industrial Specialties [Member] | Employee Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Reserve as of the beginning of the period	2	6
Additions	0	2
Cash payments	(2)	(6)
Other changes	0	0
Exchange rate changes	0	0
Reserve as of the end of the period	0	2
Total	2	6
Industrial Specialties [Member] | Plant/Office Closures [Member]
Restructuring Cost and Reserve [Line Items]
Reserve as of the beginning of the period	0	0
Additions	0	0
Cash payments	0	0
Other changes	0	0
Exchange rate changes	0	0
Reserve as of the end of the period	0	0
Total	0	0
Acetyl Intermediates [Member]
Restructuring Cost and Reserve [Line Items]
Reserve as of the end of the period	3
Total	3
Acetyl Intermediates [Member] | Employee Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Reserve as of the beginning of the period	1	1
Additions	0	1
Cash payments	0	(1)
Other changes	0	0
Exchange rate changes	0	0
Reserve as of the end of the period	1	1
Total	1	1
Acetyl Intermediates [Member] | Plant/Office Closures [Member]
Restructuring Cost and Reserve [Line Items]
Reserve as of the beginning of the period	0	0
Additions	29	0
Cash payments	(24)	0
Other changes	(3)	0
Exchange rate changes	0	0
Reserve as of the end of the period	2	0
Total	0	0
Other [Member]
Restructuring Cost and Reserve [Line Items]
Reserve as of the end of the period	1
Total	1
Other [Member] | Employee Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Reserve as of the beginning of the period	3	6
Additions	1	3
Cash payments	(2)	(5)
Other changes	(1)	(1)
Exchange rate changes	0	0
Reserve as of the end of the period	1	3
Total	3	6
Other [Member] | Plant/Office Closures [Member]
Restructuring Cost and Reserve [Line Items]
Reserve as of the beginning of the period	0	0
Additions	0	0
Cash payments	0	0
Other changes	0	0
Exchange rate changes	0	0
Reserve as of the end of the period	0	0
Total	$ 0	$ 0

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Other (Charges) Gains, Net (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015	Dec. 01, 2015
Other (Charges) Gains, Net [Line Items]
Commercial disputes			$ 0		$ 2		$ 2
Employee termination benefits			(4)	[1]	(11)	[1]	(53)
Asset impairments			0		(2)		(126)
Singapore contract termination			0		0		(174)
Employee Termination Benefits [Member]
Other (Charges) Gains, Net [Line Items]
Employee termination benefits					(11)		(21)
Lanaken, Belgium | Consumer Specialties [Member]
Other (Charges) Gains, Net [Line Items]
Employee termination benefits							$ (24)
Capacity Reduction Percentage	50.00%	50.00%					50.00%	50.00%
Meredosia, IL [Member] | Industrial Specialties [Member]
Other (Charges) Gains, Net [Line Items]
Employee termination benefits							$ (1)
Asset impairments							(1)
Nanjing, China [Member]
Other (Charges) Gains, Net [Line Items]
Asset impairments							(123)
Nanjing, China [Member] | Acetyl Intermediates [Member]
Other (Charges) Gains, Net [Line Items]
Asset impairments		$ (123)
SINGAPORE
Other (Charges) Gains, Net [Line Items]
Singapore contract termination							(174)
SINGAPORE | Acetyl Intermediates [Member]
Other (Charges) Gains, Net [Line Items]
Singapore contract termination	$ (174)
Tarragona, Spain [Member] | Industrial Specialties [Member]
Other (Charges) Gains, Net [Line Items]
Employee termination benefits							(6)
Asset impairments							$ (1)
Pension Plan [Member]
Other (Charges) Gains, Net [Line Items]
Special Termination Benefits recorded in Benefit Obligations			$ 1		$ 3

[1] Includes $1 million and $3 million of special termination benefits included in Benefit obligations in the consolidated balance sheet as of December 31, 2017 and 2016, respectively.

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Income Taxes (Schedule of Earnings (Loss) from Continuing Operations Before Tax by Jurisdiction) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
US	$ 262	$ 326	$ 231
International	813	704	257
Earnings (loss) from continuing operations before tax	$ 1,075	$ 1,030	$ 488
Effective income tax rate	20.00%	12.00%	41.00%

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Income Taxes (Schedule of Income Tax Provision (Benefit)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
US	$ 201	$ (22)	$ 28
International	158	60	152
Total	359	38	180
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
US	(110)	108	54
International	(36)	(24)	(33)
Total	(146)	84	21
Income tax provision (benefit)	$ 213	$ 122	$ 201

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Income Taxes Income Taxes (Schedule of Effective Tax Rate Reconciliation) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Line Items]
Income tax provision computed at US federal statutory tax rate	$ 376	$ 361	$ 171
Change in valuation allowance	218	(18)	124
Equity income and dividends	(87)	(60)	(33)
(Income) expense not resulting in tax impact, net	(157)	(152)	(32)
US tax effect of foreign earnings and dividends	521	302	15
Foreign tax credits	(759)	(293)	(4)
Other foreign tax rate differentials	(38)	(48)	(47)
Legislative changes	116	4	9
State income taxes, net of federal benefit	12	8	6
Other, net	11	18	(8)
Income tax provision (benefit)	$ 213	$ 122	$ 201
Effective income tax rate	20.00%	12.00%	41.00%

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Income Taxes (Income Tax Provision Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Tax Credit Carryforward [Line Items]
Plant Office Closures			$ 52	$ 0	$ 0
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities			6	55	33
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions					29
Asset impairments			0	(2)	(126)
Singapore contract termination			0	$ 0	$ (174)
Tax Credit Carryforward, Amount			240
Tax Credit Carryforward, Valuation Allowance			164
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Transition Tax for Accumulated Foreign Earnings, Provisional Income Tax Expense (Benefit)			370
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Transition Tax for Accumulated Foreign Earnings, Provisional Income Tax Expense (Benefit) Net			197
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Change in Tax Rate, Deferred Tax Liability, Provisional Income Tax (Expense) Benefit			107
Accumulated but undistributed earnings permanently reinvested in business			$ 3,000
Effective income tax rate			20.00%	12.00%	41.00%
SINGAPORE
Tax Credit Carryforward [Line Items]
Singapore contract termination					$ (174)
Nanjing, China [Member]
Tax Credit Carryforward [Line Items]
Asset impairments					$ (123)
Acetyl Intermediates [Member]
Tax Credit Carryforward [Line Items]
Plant Office Closures			$ 51
Acetyl Intermediates [Member] | SINGAPORE
Tax Credit Carryforward [Line Items]
Singapore contract termination	$ (174)
Acetyl Intermediates [Member] | Nanjing, China [Member]
Tax Credit Carryforward [Line Items]
Asset impairments		$ (123)

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Income Taxes (Schedule of Consolidated Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Defined Contribution Plan, Employer Discretionary Contribution Amount		$ 316
Deferred Tax Assets
Pension and postretirement obligations	[1]	143	$ 313
Accrued expenses		50	61
Inventory		10	11
Net operating loss		703	661
Tax credit carryforwards	[2]	478	136
Other		192	161
Subtotal		1,576	1,343
Valuation allowance	[3]	(618)	(386)
Total		958	957
Deferred Tax Liabilities
Depreciation and amortization		307	366
Investments in affiliates		427	475
Other		69	87
Total		803	928
Net deferred tax assets (liabilities)		$ 155	$ 29

[1] For the year ended December 31, 2017, the pension and postretirement obligations decreased primarily due to $316 million in employer contributions made to the US defined benefit plans (Note 15).

[2] For the year ended December 31, 2017, the tax credit carryforwards increased primarily due to internal reorganization transactions made in preparation for the proposed acetate tow joint venture with Blackstone discussed herein and Note 4.

[3] Includes deferred tax asset valuation allowances for the Company's deferred tax assets in the US, Luxembourg, Spain, China, Singapore, the United Kingdom, Canada and France. These valuation allowances relate primarily to net operating loss carryforward benefits and other net deferred tax assets, all of which may not be realizable. For the year ended December 31, 2017, the valuation allowance increased primarily due to the impact of the TCJA on excess foreign tax credits.

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Income Taxes (Net Operating Loss Carryforwards and Tax Credit Carryforwards Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($)
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Amount	$ 452
Tax Credit Carryforward, Valuation Allowance	164
Alternative Minimum Tax Credit Carryforwards, Before Tax	$ 21
Tax Credit Carryforward, Expiration Date	Dec. 31, 2027
US Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 35
State [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	42
Valuation allowance offset for State net operating loss carryforwards due to uncertain recoverability	38
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	2,600
CHINA
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 473
Minimum [Member] | US Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward expiration	Dec. 31, 2021
Minimum [Member] | CHINA
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward expiration	Dec. 31, 2018
Maximum [Member] | CHINA
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward expiration	Dec. 31, 2022

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Income Taxes (Schedule of Reconciliation of Unrecognized Tax Benefits Included in Uncertain Tax Positions) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits	$ 114		$ 158		$ 228		$ 119	$ 114	$ 158
As of the beginning of the year	114		158		228
Increases in tax positions for the current year	14		9		13
Increases in tax positions for prior years(1)	4	[1]	11		76
Decreases in tax positions for prior years	(7)		(9)		(126)
Decreases due to settlements	(6)		(55)		(33)
As of the end of the year	119		114		158
Total uncertain tax positions that if recognized would impact the effective tax rate							100	87	144
Total amount of interest expense (benefit) and penalties recognized in the consolidated statements of operations(2)	6		(16)	[2]	(12)	[2]
Total amount of interest expense and penalties recognized in the consolidated balance sheets							38	$ 26	$ 43
Decreases in interest and penalties due to settlements			$ (1)		$ (12)
Nilit [Member]
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits	4						$ 4
As of the end of the year	$ 4

[1] Includes uncertain tax positions related to the Nilit acquisition (Note 4) of $4 million for the year ended December 31, 2017.

[2] This amount reflects interest on uncertain tax positions and release of certain tax positions as a result of audit closure that was reflected in the consolidated statements of operations. In addition, for the years ended December 31, 2016 and 2015, the Company also paid an additional $1 million and $12 million, respectively, of previously accrued amounts due to settlements of tax examinations.

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Income Taxes (Uncertain Tax Positions Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Jan. 31, 2018
Income Tax Examination [Line Items]
Income Tax Examination, pre-tax adjustments proposed	$ 192
Income Tax Examination, Estimate of Possible Loss	$ 136
Subsequent Event [Member]
Income Tax Examination [Line Items]
Income Tax Examination, pre-tax adjustments proposed		$ 198

XML

Management Compensation Plans (Schedule of Total Shares Available for and Subject to Awards) (Details) - Global Incentive Plan 2009 [Member]	Dec. 31, 2017 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Available for Awards	5,663,628
Shares Subject to Outstanding Awards	1,701,713

XML

Management Compensation Plans (Schedule of Realized Income Tax Benefits from Stock Option Exercises and RSU Vestings) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options	$ 9	$ 7	$ 2

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Management Compensation Plans (Schedule of Summary of Changes in Performance-based RSUs Outstanding) (Details) - Performance Shares [Member] shares in Thousands	12 Months Ended
	Dec. 31, 2017 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
As of beginning of period, number of units | shares	1,085
Vested, number of units | shares	(527)
Canceled, number of units | shares	(150)
Forfeited, number of units | shares	(87)
As of end of period, number of units | shares	860
As of beginning of period, weighted average fair value | $ / shares	$ 53.36
Vested, weighted average fair value | $ / shares	49.36
Canceled, weighted average fair value | $ / shares	53.21
Forfeited, weighted average fair value | $ / shares	62.36
As of end of period, weighted average fair value | $ / shares	$ 64.71
2015 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, number of units | shares	314
Granted, weighted average fair value | $ / shares	$ 83.52
2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, number of units | shares	225	[1]
Granted, weighted average fair value | $ / shares	$ 48.70	[1]

[1] Represents additional performance-based RSU grants in 2014 that were awarded in 2017 as a result of achieving internal profitability targets.

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Management Compensation Plans (Schedule of Fair Value of Shares Vested for Performance-based RSUs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total	$ 42	$ 64	$ 27

XML

Management Compensation Plans (Schedule of Summary of Changes in Time-based RSUs Outstanding) (Details) - Employee [Member] - Time Restricted Stock Units (RSUs) [Member] shares in Thousands	12 Months Ended
	Dec. 31, 2017 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
As of beginning of period, number of units | shares	344
Granted, number of units | shares	159
Vested, number of units | shares	(123)
Forfeited, number of units | shares	(29)
As of end of period, number of units | shares	351
As of beginning of period, weighted average fair value | $ / shares	$ 67.42
Granted, weighted average fair value | $ / shares	86.20
Vested, weighted average fair value | $ / shares	67.78
Forfeited, weighted average fair value | $ / shares	68.29
As of end of period, weighted average fair value | $ / shares	$ 75.75

XML

Management Compensation Plans (Schedule of Fair Value of Shares Vested for Time-based RSUs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Time Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total	$ 12	$ 4	$ 6

XML

Management Compensation Plans (Restricted Stock Units Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($)
Performance Restricted and Time Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 52
Weighted average term to recognize compensation expense	2 years
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Range of number of shares that will vest	zero to stretch
Director [Member] | Time Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Employee [Member] | Time Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years

XML

Leases (Schedule of Future Minimum Lease Payments for Capital Leases) (Details) $ in Millions	Dec. 31, 2017 USD ($)
Leases [Abstract]
2018	$ 53
2019	46
2020	45
2021	44
2022	33
Later years	114
Sublease income	0
Minimum lease commitments	335
Less amounts representing interest	(127)
Present value of net minimum lease obligations	$ 208

XML

Leases (Schedule of Future Minimum Rental Payments for Operating Leases) (Details) $ in Millions	Dec. 31, 2017 USD ($)
Leases [Abstract]
2018	$ 54
2019	47
2020	37
2021	28
2022	22
Later years	155
Sublease income	0
Minimum lease commitments	$ 343

XML

Leases (Schedule of Rent Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Leases [Abstract]
Total	$ 159	$ 154	$ 154

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Derivative Financial Instruments Derivative Financial Instruments (Schedule of Cross Currency Swaps) (Details) - 1 months ended Mar. 31, 2015 € in Millions, $ in Millions	USD ($)	EUR (€)
Swap Derivative 4 Point 27 Percent Maturing September 11, 2020 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Value	$ 250
Swap Derivative 2 Point 63 Percent Maturing September 11, 2020 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Value | €		€ 193
Swap Derivative 3 Point 62 Percent Maturing April 17, 2019 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Value | €		€ 162
Swap Derivative 2 Point 77 Percent Maturing April 17, 2019 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Value	225
Cross-currency swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Cash Received on Hedge	$ 88

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Derivative Financial Instruments (Schedule of Notional Amounts of Net Foreign Exchange Exposure by Currency) (Details) - Foreign Exchange Contract [Member] $ in Millions	Dec. 31, 2017 USD ($)
Derivative [Line Items]
Total	$ (28)
Brazilian Real [Member]
Derivative [Line Items]
Total	(13)
British Pound Sterling [Member]
Derivative [Line Items]
Total	(93)
Canadian Dollar [Member]
Derivative [Line Items]
Total	36
Euro [Member]
Derivative [Line Items]
Total	(6)
Hungarian Forint [Member]
Derivative [Line Items]
Total	10
Indonesia, Rupiahs
Derivative [Line Items]
Total	(4)
Korea (South), Won
Derivative [Line Items]
Total	10
Singapore Dollar [Member]
Derivative [Line Items]
Total	$ 32

XML

Derivative Financial Instruments (Schedule of Notional Amounts of Foreign Currency Derivatives) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Foreign Exchange Contract [Member]
Derivative [Line Items]
Total	$ 740	$ 508

XML

Derivative Financial Instruments (Schedule of Interest Rate Swap Activity Recorded in the Consolidated Financial Statements) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Cost of Goods and Services Sold	$ 4,625	$ 3,984	$ 4,356
Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Cost of Goods and Services Sold	4	2	2
Ineffective portion - Other income (expense), net	$ 0	$ 0	$ 0

XML

Derivative Financial Instruments (Schedule of Changes in Fair Value of Derivatives) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Commodity [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain (loss) recognized in Other comprehensive income (loss)	$ 4	$ 7	$ 0
Commodity [Member] | Cost of Sales [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain (loss) recognized in Earnings (loss)	5	2	0
Foreign currency forwards and swaps
Derivative [Line Items]
Notional Value	740	508
Foreign currency forwards and swaps | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain (loss) recognized in Other comprehensive income (loss)	(1)	0
Foreign currency forwards and swaps | Derivatives Not Designated as Hedges [Member]
Derivative [Line Items]
Gain (loss) recognized in Other comprehensive income (loss)	0	0	0
Foreign currency forwards and swaps | Cost of Sales [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain (loss) recognized in Earnings (loss)	(1)	0	0
Foreign currency forwards and swaps | Foreign Currency Gain (Loss) [Member] | Derivatives Not Designated as Hedges [Member]
Derivative [Line Items]
Gain (loss) recognized in Earnings (loss)	2	14	(82)
Foreign currency forwards and swaps | Net Investment Hedging [Member]
Derivative [Line Items]
Gain (loss) recognized in Other comprehensive income (loss)	2	0	0
Amount of Ineffectiveness on Net Investment Hedges	0	0	0
Interest rate swaps | Derivatives Not Designated as Hedges [Member]
Derivative [Line Items]
Gain (loss) recognized in Other comprehensive income (loss)	0	0	0
Interest rate swaps | Interest Expense [Member] | Derivatives Not Designated as Hedges [Member]
Derivative [Line Items]
Gain (loss) recognized in Earnings (loss)	0	0	(1)
Cross-currency swaps | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain (loss) recognized in Other comprehensive income (loss)	0	0	0
Cross-currency swaps | Foreign Currency Gain (Loss) [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain (loss) recognized in Earnings (loss)	0	0	46
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain (loss) recognized in Other comprehensive income (loss)	3	7	0
Gain (loss) recognized in Earnings (loss)	4	2	46
Derivatives Not Designated as Hedges [Member]
Derivative [Line Items]
Gain (loss) recognized in Other comprehensive income (loss)	0	0	0
Gain (loss) recognized in Earnings (loss)	2	14	(83)
Foreign Currency Denominated Debt [Member] | Net Investment Hedging [Member]
Derivative [Line Items]
Gain (Loss) On Non-Derivative Used In Net Investment Hedge	(119)	61	48
Amount of Ineffectiveness on Net Investment Hedges	0	0	0
Term C-2 and C-3 Loan Facilities [Member] | Net Investment Hedging [Member]
Derivative [Line Items]
Gain (Loss) On Non-Derivative Used In Net Investment Hedge	$ (117)	$ 61	$ 48

XML

Derivative Financial Instruments (Schedule of Offsetting Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Derivative Asset [Abstract]
Gross amount recognized	$ 13	$ 14
Gross amount offset in the consolidated balance sheets	4	4
Net amount presented in the consolidated balance sheets	9	10
Gross amount not offset in the consolidated balance sheets	3	2
Net amount	$ 6	$ 8

XML

Derivative Financial Instruments (Schedule of Offsetting Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Derivative Liability [Abstract]
Gross amount recognized	$ 7	$ 7
Gross amount offset in the consolidated balance sheets	4	4
Net amount presented in the consolidated balance sheets	3	3
Gross amount not offset in the consolidated balance sheets	3	2
Net amount	$ 0	$ 1

XML

Derivative Financial Instruments (Narrative) (Details) - 1 months ended Mar. 31, 2015 € in Millions, $ in Millions	USD ($)	EUR (€)
Swap Derivative 4 Point 27 Percent Maturing September 11, 2020 [Member]
Derivative [Line Items]
Notional Value	$ 250
Swap Derivative 2 Point 63 Percent Maturing September 11, 2020 [Member]
Derivative [Line Items]
Notional Value | €		€ 193
Swap Derivative 2 Point 77 Percent Maturing April 17, 2019 [Member]
Derivative [Line Items]
Notional Value	225
Swap Derivative 3 Point 62 Percent Maturing April 17, 2019 [Member]
Derivative [Line Items]
Notional Value | €		€ 162
Cross-currency swaps
Derivative [Line Items]
Derivative, Cash Received on Hedge	$ 88

XML

Derivative Financial Instruments Schedule of Notional Amounts of Net Investment Hedges (Details) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Net Investment Hedging [Member] | Foreign Currency Denominated Debt [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount of Nonderivative Instruments	€ 1,050	€ 850

XML

Fair Value Measurements (Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	$ 6	$ 8
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	9	10
Total liabilities	(3)	(3)
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	0	0
Total liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	9	10
Total liabilities	(3)	(3)
Other Current Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Derivatives Not Designated as Hedges [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency forwards and swaps	(3)	(3)
Other Current Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Derivatives Not Designated as Hedges [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency forwards and swaps	0	0
Other Current Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Derivatives Not Designated as Hedges [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency forwards and swaps	(3)	(3)
Other Current Assets [Member] | Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	2	5
Other Current Assets [Member] | Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0	0
Other Current Assets [Member] | Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	2	5
Other Current Assets [Member] | Fair Value, Measurements, Recurring [Member] | Derivatives Not Designated as Hedges [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency forwards and swaps	5	5
Other Current Assets [Member] | Fair Value, Measurements, Recurring [Member] | Derivatives Not Designated as Hedges [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency forwards and swaps	0	0
Other Current Assets [Member] | Fair Value, Measurements, Recurring [Member] | Derivatives Not Designated as Hedges [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency forwards and swaps	5	5
Other Noncurrent Assets [Member] | Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	2	0
Other Noncurrent Assets [Member] | Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0	0
Other Noncurrent Assets [Member] | Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	$ 2	$ 0

XML

Fair Value Measurements (Schedule of Carrying Values and Fair Values of Financial Instruments) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cost investments, carrying amount	$ 159	$ 155
Cost investments, fair value	0	0
Insurance contracts in nonqualified pension trusts, carrying amount	42	49
Insurance contracts in nonqualified pension trusts, fair value	42	49
Long-term debt, including current installments of long-term debt, carrying amount	3,398	2,938
Long-term debt, including current installments of long-term debt, fair value	3,507	3,043
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cost investments, fair value	0	0
Insurance contracts in nonqualified pension trusts, fair value	42	49
Long-term debt, including current installments of long-term debt, fair value	3,299	2,826
Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cost investments, fair value	0	0
Insurance contracts in nonqualified pension trusts, fair value	0	0
Long-term debt, including current installments of long-term debt, fair value	$ 208	$ 217

XML

Commitments and Contingencies (Guarantees - Demerger and Divesture Obligations Narrative) (Details) € in Millions, $ in Millions	12 Months Ended	218 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2017 EUR (€)
Indemnification Agreements Hoechst [Member]
Loss Contingencies [Line Items]
Number of divestiture agreements	19	19	19
Indemnification floor amount | €			€ 250
Indemnification ceiling amount | €			€ 750
Indemnification percentage exceeding ceiling amount	33.33%	33.33%	33.33%
Loss contingency accrual, carrying value, payments | $		$ 80
Indemnification percentage, other	33.33%	33.33%	33.33%
Divestiture Agreements [Member]
Loss Contingencies [Line Items]
Divestiture obligations range, years	2037
Guarantee obligations, maximum exposure | $	$ 122	$ 122

XML

Commitments and Contingencies (Purchase Obligations Narrative) (Details) $ in Billions	12 Months Ended
	Dec. 31, 2017 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Term of unrecorded unconditional purchase obligations	Dec. 31, 2036
Unrecorded unconditional purchase obligations	$ 1.8

XML

Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Supplemental Cash Flow Information [Abstract]
Interest paid, net of amounts capitalized	$ 130	$ 130	$ 120
Taxes paid, net of refunds	123	129	151
Noncash Investing and Financing Activities
Accrued capital expenditures	14	1	(37)
Asset retirement obligations	2	2	3
Capital lease obligations	0	0	6
Fair value adjustment to securities available for sale, net of tax	(1)	0
Distribution to noncontrolling interests (Note 5)	$ 0	$ 0	$ (4)

XML

Segment Information (Schedule of Business Segments) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Net sales		$ 6,140	$ 5,389	$ 5,674
Other (charges) gains, net		(60)	(11)	(351)
Operating profit (loss)		901	893	326
Equity in net earnings (loss) of affiliates		183	155	181
Depreciation and amortization		305	290	357
Capital expenditures	[1]	281	247	483
Goodwill and intangible assets, net		1,304	990
Total assets		9,538	8,357
Increase (decrease) in accrued capital expenditures		14	1	(37)
Operating Segments [Member] | Advanced Engineered Materials [Member]
Segment Reporting Information [Line Items]
Net sales		2,096	1,444	1,326
Other (charges) gains, net		(2)	(2)	(7)
Operating profit (loss)		383	350	235
Equity in net earnings (loss) of affiliates		168	122	150
Depreciation and amortization		108	92	99
Capital expenditures		75	73	73
Goodwill and intangible assets, net		798	517
Total assets		3,672	2,792
Operating Segments [Member] | Consumer Specialties [Member]
Segment Reporting Information [Line Items]
Net sales	[2]	785	929	969
Other (charges) gains, net		(2)	(2)	(25)
Operating profit (loss)		218	302	262
Equity in net earnings (loss) of affiliates		3	3	2
Depreciation and amortization		44	45	60
Capital expenditures		42	38	65
Goodwill and intangible assets, net		258	244
Total assets		1,357	1,324
Operating Segments [Member] | Industrial Specialties [Member]
Segment Reporting Information [Line Items]
Net sales	[3]	1,023	979	1,082
Other (charges) gains, net		0	(3)	(10)
Operating profit (loss)		87	105	72
Equity in net earnings (loss) of affiliates		0	0	0
Depreciation and amortization		38	34	64
Capital expenditures		30	57	56
Goodwill and intangible assets, net		46	46
Total assets		861	758
Operating Segments [Member] | Acetyl Intermediates [Member]
Segment Reporting Information [Line Items]
Net sales	[4]	2,669	2,441	2,744
Other (charges) gains, net		(52)	(3)	(300)
Operating profit (loss)		424	340	(3)
Equity in net earnings (loss) of affiliates		6	6	6
Depreciation and amortization		105	107	123
Capital expenditures		120	67	282
Goodwill and intangible assets, net		202	183
Total assets		2,657	2,440
Corporate, Non-Segment [Member] | Other Activities [Member]
Segment Reporting Information [Line Items]
Net sales		0	0	0
Other (charges) gains, net		(4)	(1)	(9)
Operating profit (loss)		(211)	(205)	(240)
Equity in net earnings (loss) of affiliates		6	24	23
Depreciation and amortization		10	12	11
Capital expenditures		14	12	7
Goodwill and intangible assets, net		0	0
Total assets		991	1,043
Intersegment [Member]
Segment Reporting Information [Line Items]
Net sales		(433)	(404)	(447)
Other (charges) gains, net		0	0	0
Operating profit (loss)		0	1	0
Equity in net earnings (loss) of affiliates		0	0	0
Depreciation and amortization		0	0	0
Capital expenditures		0	0	0
Goodwill and intangible assets, net		0	0
Total assets		0	0
Intersegment [Member] | Consumer Specialties [Member]
Segment Reporting Information [Line Items]
Net sales		2	0	0
Intersegment [Member] | Industrial Specialties [Member]
Segment Reporting Information [Line Items]
Net sales		4	3	0
Intersegment [Member] | Acetyl Intermediates [Member]
Segment Reporting Information [Line Items]
Net sales		$ 427	$ 401	$ 447

[1] Includes an increase in accrued capital expenditures of $14 million, an increase of $1 million and a decrease of $37 million for the years ended December 31, 2017, 2016 and 2015, respectively.

[2] Includes intersegment sales of $2 million, $0 million and $0 million for the year ended December 31, 2017, 2016 and 2015, respectively.

[3] Includes intersegment sales of $4 million, $3 million and $0 million for the years ended December 31, 2017, 2016 and 2015, respectively.

[4] Includes intersegment sales of $427 million, $401 million and $447 million for the years ended December 31, 2017, 2016 and 2015, respectively.

XML

Segment Information (Schedule of Geographical Segments) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 6,140	$ 5,389	$ 5,674
Property, plant and equipment, net	3,762	3,577
BELGIUM
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	295	408	417
Property, plant and equipment, net	57	55
CANADA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	92	123	162
Property, plant and equipment, net	128	132
CHINA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	833	745	800
Property, plant and equipment, net	363	359
GERMANY
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	1,776	1,540	1,779
Property, plant and equipment, net	979	868
ITALY
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	259	13	0
Property, plant and equipment, net	51	45
MEXICO
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	257	214	204
Property, plant and equipment, net	162	159
SINGAPORE
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	867	758	703
Property, plant and equipment, net	87	90
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	1,572	1,451	1,463
Property, plant and equipment, net	1,857	1,798
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	189	137	$ 146
Property, plant and equipment, net	$ 78	$ 71

XML

Earnings (Loss) Per Share (Schedule of Earnings (Loss) Per Share) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Amounts attributable to Celanese Corporation
Earnings (loss) from continuing operations		$ 856	$ 902	$ 306
Earnings (loss) from discontinued operations		(13)	(2)	(2)
Net earnings (loss)		$ 843	$ 900	$ 304
Weighted average shares - basic		137,902,667	144,939,433	150,838,050
Incremental shares attributable to equity awards	[1]	414,728	728,748	1,449,905
Weighted average shares - diluted		138,317,395	145,668,181	152,287,955
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		29	836	2,903

[1] Excludes 29, 836 and 2,903 equity award shares for the years ended December 31, 2017, 2016 and 2015, respectively, as their effect would have been antidilutive.

XML

Consolidating Guarantor Financial Information (Schedule of Consolidating Statements of Operations) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 6,140	$ 5,389	$ 5,674
Cost of sales	(4,625)	(3,984)	(4,356)
Gross profit	1,515	1,405	1,318
Selling, general and administrative expenses	(456)	(416)	(506)
Amortization of intangible assets	(20)	(9)	(11)
Research and development expenses	(72)	(78)	(119)
Other (charges) gains, net	(60)	(11)	(351)
Foreign exchange gain (loss), net	(1)	(1)	4
Gain (loss) on disposition of businesses and assets, net	(5)	3	(9)
Operating profit (loss)	901	893	326
Equity in net earnings (loss) of affiliates	183	155	181
Interest expense	(122)	(120)	(119)
Refinancing expense	0	(6)	0
Interest income	2	2	1
Dividend income - cost investments	108	108	107
Other income (expense), net	3	(2)	(8)
Earnings (loss) from continuing operations before tax	1,075	1,030	488
Income tax (provision) benefit	(213)	(122)	(201)
Earnings (loss) from continuing operations	862	908	287
Earnings (loss) from operation of discontinued operations	(16)	(3)	(3)
Gain (loss) on disposition of discontinued operations	0	0	0
Income tax (provision) benefit from discontinued operations	3	1	1
Earnings (loss) from discontinued operations	(13)	(2)	(2)
Net earnings (loss)	849	906	285
Net (earnings) loss attributable to noncontrolling interests	(6)	(6)	19
Net earnings (loss) attributable to Celanese Corporation	843	900	304
Parent Guarantor [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	0	0	0
Cost of sales	0	0	0
Gross profit	0	0	0
Selling, general and administrative expenses	0	0	0
Amortization of intangible assets	0	0	0
Research and development expenses	0	0	0
Other (charges) gains, net	0	0	0
Foreign exchange gain (loss), net	0	0	0
Gain (loss) on disposition of businesses and assets, net	0	0	0
Operating profit (loss)	0	0	0
Equity in net earnings (loss) of affiliates	843	898	302
Interest expense	0	0	0
Refinancing expense	0	0	0
Interest income	0	0	0
Dividend income - cost investments	0	0	0
Other income (expense), net	0	0	0
Earnings (loss) from continuing operations before tax	843	898	302
Income tax (provision) benefit	0	2	2
Earnings (loss) from continuing operations	843	900	304
Earnings (loss) from operation of discontinued operations	0	0	0
Gain (loss) on disposition of discontinued operations	0	0	0
Income tax (provision) benefit from discontinued operations	0	0	0
Earnings (loss) from discontinued operations	0	0	0
Net earnings (loss)	843	900	304
Net (earnings) loss attributable to noncontrolling interests	0	0	0
Net earnings (loss) attributable to Celanese Corporation	843	900	304
Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	0	0	0
Cost of sales	0	0	0
Gross profit	0	0	0
Selling, general and administrative expenses	0	0	0
Amortization of intangible assets	0	0	0
Research and development expenses	0	0	0
Other (charges) gains, net	0	0	0
Foreign exchange gain (loss), net	0	0	0
Gain (loss) on disposition of businesses and assets, net	0	0	0
Operating profit (loss)	0	0	0
Equity in net earnings (loss) of affiliates	867	939	314
Interest expense	(20)	(16)	(77)
Refinancing expense	0	(4)	0
Interest income	25	12	18
Dividend income - cost investments	0	0	0
Other income (expense), net	(3)	(1)	(2)
Earnings (loss) from continuing operations before tax	869	930	253
Income tax (provision) benefit	(26)	(32)	49
Earnings (loss) from continuing operations	843	898	302
Earnings (loss) from operation of discontinued operations	0	0	0
Gain (loss) on disposition of discontinued operations	0	0	0
Income tax (provision) benefit from discontinued operations	0	0	0
Earnings (loss) from discontinued operations	0	0	0
Net earnings (loss)	843	898	302
Net (earnings) loss attributable to noncontrolling interests	0	0	0
Net earnings (loss) attributable to Celanese Corporation	843	898	302
Subsidiary Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	2,240	2,162	2,410
Cost of sales	(1,717)	(1,657)	(1,729)
Gross profit	523	505	681
Selling, general and administrative expenses	(135)	(112)	(242)
Amortization of intangible assets	(4)	(5)	(5)
Research and development expenses	(31)	(32)	(78)
Other (charges) gains, net	(7)	0	(5)
Foreign exchange gain (loss), net	0	0	0
Gain (loss) on disposition of businesses and assets, net	(8)	(8)	(6)
Operating profit (loss)	338	348	345
Equity in net earnings (loss) of affiliates	591	653	84
Interest expense	(104)	(94)	(76)
Refinancing expense	0	(2)	0
Interest income	4	4	40
Dividend income - cost investments	0	0	0
Other income (expense), net	2	1	2
Earnings (loss) from continuing operations before tax	831	910	395
Income tax (provision) benefit	(62)	(53)	(133)
Earnings (loss) from continuing operations	769	857	262
Earnings (loss) from operation of discontinued operations	(2)	(2)	(3)
Gain (loss) on disposition of discontinued operations	0	0	0
Income tax (provision) benefit from discontinued operations	1	0	1
Earnings (loss) from discontinued operations	(1)	(2)	(2)
Net earnings (loss)	768	855	260
Net (earnings) loss attributable to noncontrolling interests	0	0	0
Net earnings (loss) attributable to Celanese Corporation	768	855	260
Non-Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	5,013	4,322	4,485
Cost of sales	(4,016)	(3,428)	(3,897)
Gross profit	997	894	588
Selling, general and administrative expenses	(321)	(304)	(264)
Amortization of intangible assets	(16)	(4)	(6)
Research and development expenses	(41)	(46)	(41)
Other (charges) gains, net	(53)	(11)	(346)
Foreign exchange gain (loss), net	(1)	(1)	4
Gain (loss) on disposition of businesses and assets, net	3	17	(3)
Operating profit (loss)	568	545	(68)
Equity in net earnings (loss) of affiliates	166	146	162
Interest expense	(30)	(29)	(36)
Refinancing expense	0	0	0
Interest income	5	5	13
Dividend income - cost investments	111	107	107
Other income (expense), net	4	(2)	(8)
Earnings (loss) from continuing operations before tax	824	772	170
Income tax (provision) benefit	(125)	(36)	(98)
Earnings (loss) from continuing operations	699	736	72
Earnings (loss) from operation of discontinued operations	(14)	(1)	0
Gain (loss) on disposition of discontinued operations	0	0	0
Income tax (provision) benefit from discontinued operations	2	1	0
Earnings (loss) from discontinued operations	(12)	0	0
Net earnings (loss)	687	736	72
Net (earnings) loss attributable to noncontrolling interests	(6)	(6)	19
Net earnings (loss) attributable to Celanese Corporation	681	730	91
Consolidation Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	(1,113)	(1,095)	(1,221)
Cost of sales	1,108	1,101	1,270
Gross profit	(5)	6	49
Selling, general and administrative expenses	0	0	0
Amortization of intangible assets	0	0	0
Research and development expenses	0	0	0
Other (charges) gains, net	0	0	0
Foreign exchange gain (loss), net	0	0	0
Gain (loss) on disposition of businesses and assets, net	0	(6)	0
Operating profit (loss)	(5)	0	49
Equity in net earnings (loss) of affiliates	(2,284)	(2,481)	(681)
Interest expense	32	19	70
Refinancing expense	0	0	0
Interest income	(32)	(19)	(70)
Dividend income - cost investments	(3)	1	0
Other income (expense), net	0	0	0
Earnings (loss) from continuing operations before tax	(2,292)	(2,480)	(632)
Income tax (provision) benefit	0	(3)	(21)
Earnings (loss) from continuing operations	(2,292)	(2,483)	(653)
Earnings (loss) from operation of discontinued operations	0	0	0
Gain (loss) on disposition of discontinued operations	0	0	0
Income tax (provision) benefit from discontinued operations	0	0	0
Earnings (loss) from discontinued operations	0	0	0
Net earnings (loss)	(2,292)	(2,483)	(653)
Net (earnings) loss attributable to noncontrolling interests	0	0	0
Net earnings (loss) attributable to Celanese Corporation	$ (2,292)	$ (2,483)	$ (653)

XML

Consolidating Guarantor Financial Information (Schedule of Consolidating Statements of Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Net earnings (loss)	$ 849	$ 906	$ 285
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	(1)	0	0
Foreign currency translation	174	(11)	(188)
Gain (loss) on cash flow hedges	(1)	5	2
Pension and postretirement benefits	9	(4)	3
Total other comprehensive income (loss), net of tax	181	(10)	(183)
Total comprehensive income (loss), net of tax	1,030	896	102
Comprehensive (income) loss attributable to noncontrolling interests	(6)	(6)	19
Comprehensive income (loss) attributable to Celanese Corporation	1,024	890	121
Parent Guarantor [Member]
Condensed Financial Statements, Captions [Line Items]
Net earnings (loss)	843	900	304
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	(1)	0	0
Foreign currency translation	174	(11)	(188)
Gain (loss) on cash flow hedges	(1)	5	2
Pension and postretirement benefits	9	(4)	3
Total other comprehensive income (loss), net of tax	181	(10)	(183)
Total comprehensive income (loss), net of tax	1,024	890	121
Comprehensive (income) loss attributable to noncontrolling interests	0	0	0
Comprehensive income (loss) attributable to Celanese Corporation	1,024	890	121
Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Net earnings (loss)	843	898	302
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	(1)	0	0
Foreign currency translation	174	(11)	(188)
Gain (loss) on cash flow hedges	(1)	5	2
Pension and postretirement benefits	9	(4)	3
Total other comprehensive income (loss), net of tax	181	(10)	(183)
Total comprehensive income (loss), net of tax	1,024	888	119
Comprehensive (income) loss attributable to noncontrolling interests	0	0	0
Comprehensive income (loss) attributable to Celanese Corporation	1,024	888	119
Subsidiary Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net earnings (loss)	768	855	260
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	(1)	0	0
Foreign currency translation	226	(65)	(181)
Gain (loss) on cash flow hedges	(1)	5	5
Pension and postretirement benefits	7	(4)	3
Total other comprehensive income (loss), net of tax	231	(64)	(173)
Total comprehensive income (loss), net of tax	999	791	87
Comprehensive (income) loss attributable to noncontrolling interests	0	0	0
Comprehensive income (loss) attributable to Celanese Corporation	999	791	87
Non-Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net earnings (loss)	687	736	72
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	(1)	0	0
Foreign currency translation	268	(73)	(231)
Gain (loss) on cash flow hedges	(1)	5	1
Pension and postretirement benefits	10	(2)	2
Total other comprehensive income (loss), net of tax	276	(70)	(228)
Total comprehensive income (loss), net of tax	963	666	(156)
Comprehensive (income) loss attributable to noncontrolling interests	(6)	(6)	19
Comprehensive income (loss) attributable to Celanese Corporation	957	660	(137)
Consolidation Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net earnings (loss)	(2,292)	(2,483)	(653)
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	3	0	0
Foreign currency translation	(668)	149	600
Gain (loss) on cash flow hedges	3	(15)	(8)
Pension and postretirement benefits	(26)	10	(8)
Total other comprehensive income (loss), net of tax	(688)	144	584
Total comprehensive income (loss), net of tax	(2,980)	(2,339)	(69)
Comprehensive (income) loss attributable to noncontrolling interests	0	0	0
Comprehensive income (loss) attributable to Celanese Corporation	$ (2,980)	$ (2,339)	$ (69)

XML

Consolidating Guarantor Financial Information (Schedule of Consolidating Balance Sheets) (Details) - USD ($) $ in Millions	Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current Assets
Cash and cash equivalents	$ 576		$ 638	$ 967	$ 780
Trade receivables - third party and affiliates	986		801
Non-trade receivables, net	244		223
Inventories, net	900		720
Marketable securities, at fair value	32		30
Other assets	54		60
Total current assets	2,792		2,472
Investments in affiliates	976		852
Property, plant and equipment, net	3,762		3,577
Deferred income taxes	366		159
Other assets	338		307
Goodwill	1,003	[1]	796	705
Intangible assets, net	301		194
Total assets	9,538		8,357
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	326		118
Trade payables - third party and affiliates	807		625
Other liabilities	354		322
Deferred income taxes	0		0
Income taxes payable	72		12
Total current liabilities	1,559		1,077
Noncurrent Liabilities
Long-term debt, net of unamortized deferred financing costs	3,315		2,890
Deferred income taxes	211		130
Uncertain tax positions	156		131
Benefit obligations	585		893
Other liabilities	413		215
Total noncurrent liabilities	4,680		4,259
Total Celanese Corporation stockholders' equity	2,887		2,588	2,378
Noncontrolling interests	412		433
Total equity	3,299		3,021	2,829
Total liabilities and equity	9,538		8,357
Parent Guarantor [Member]
Current Assets
Cash and cash equivalents	0		0	0	0
Trade receivables - third party and affiliates	0		0
Non-trade receivables, net	38		40
Inventories, net	0		0
Marketable securities, at fair value	0		0
Other assets	0		0
Total current assets	38		40
Investments in affiliates	2,850		2,548
Property, plant and equipment, net	0		0
Deferred income taxes	0		0
Other assets	0		0
Goodwill	0		0
Intangible assets, net	0		0
Total assets	2,888		2,588
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	0		0
Trade payables - third party and affiliates	0		0
Other liabilities	0		0
Deferred income taxes	0		0
Income taxes payable	0		0
Total current liabilities	0		0
Noncurrent Liabilities
Long-term debt, net of unamortized deferred financing costs	0		0
Deferred income taxes	0		0
Uncertain tax positions	0		0
Benefit obligations	0		0
Other liabilities	0		0
Total noncurrent liabilities	0		0
Total Celanese Corporation stockholders' equity	2,888		2,588
Noncontrolling interests	0		0
Total equity	2,888		2,588
Total liabilities and equity	2,888		2,588
Issuer [Member]
Current Assets
Cash and cash equivalents	0		0	0	0
Trade receivables - third party and affiliates	0		0
Non-trade receivables, net	482		499
Inventories, net	0		0
Marketable securities, at fair value	0		0
Other assets	60		42
Total current assets	542		541
Investments in affiliates	4,283		4,029
Property, plant and equipment, net	0		0
Deferred income taxes	6		0
Other assets	1,295		705
Goodwill	0		0
Intangible assets, net	0		0
Total assets	6,126		5,275
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	76		6
Trade payables - third party and affiliates	1		0
Other liabilities	71		58
Deferred income taxes	0		0
Income taxes payable	0		0
Total current liabilities	148		64
Noncurrent Liabilities
Long-term debt, net of unamortized deferred financing costs	3,128		2,647
Deferred income taxes	0		16
Uncertain tax positions	0		0
Benefit obligations	0		0
Other liabilities	0		0
Total noncurrent liabilities	3,128		2,663
Total Celanese Corporation stockholders' equity	2,850		2,548
Noncontrolling interests	0		0
Total equity	2,850		2,548
Total liabilities and equity	6,126		5,275
Subsidiary Guarantors [Member]
Current Assets
Cash and cash equivalents	230		51	21	110
Trade receivables - third party and affiliates	89		107
Non-trade receivables, net	279		249
Inventories, net	277		239
Marketable securities, at fair value	32		30
Other assets	12		25
Total current assets	919		701
Investments in affiliates	3,916		3,655
Property, plant and equipment, net	1,145		1,049
Deferred income taxes	206		91
Other assets	171		133
Goodwill	314		314
Intangible assets, net	48		48
Total assets	6,719		5,991
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	148		133
Trade payables - third party and affiliates	300		226
Other liabilities	302		167
Deferred income taxes	0		0
Income taxes payable	471		454
Total current liabilities	1,221		980
Noncurrent Liabilities
Long-term debt, net of unamortized deferred financing costs	1,254		727
Deferred income taxes	0		0
Uncertain tax positions	1		3
Benefit obligations	277		636
Other liabilities	255		74
Total noncurrent liabilities	1,787		1,440
Total Celanese Corporation stockholders' equity	3,711		3,571
Noncontrolling interests	0		0
Total equity	3,711		3,571
Total liabilities and equity	6,719		5,991
Non-Guarantors [Member]
Current Assets
Cash and cash equivalents	346		587	946	670
Trade receivables - third party and affiliates	988		819
Non-trade receivables, net	385		308
Inventories, net	672		526
Marketable securities, at fair value	0		0
Other assets	93		76
Total current assets	2,484		2,316
Investments in affiliates	861		752
Property, plant and equipment, net	2,617		2,528
Deferred income taxes	158		86
Other assets	165		156
Goodwill	689		482
Intangible assets, net	253		146
Total assets	7,227		6,466
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	369		250
Trade payables - third party and affiliates	598		524
Other liabilities	273		262
Deferred income taxes	0		0
Income taxes payable	92		75
Total current liabilities	1,332		1,111
Noncurrent Liabilities
Long-term debt, net of unamortized deferred financing costs	233		210
Deferred income taxes	215		132
Uncertain tax positions	157		130
Benefit obligations	308		257
Other liabilities	158		142
Total noncurrent liabilities	1,071		871
Total Celanese Corporation stockholders' equity	4,412		4,051
Noncontrolling interests	412		433
Total equity	4,824		4,484
Total liabilities and equity	7,227		6,466
Consolidation Eliminations [Member]
Current Assets
Cash and cash equivalents	0		0	$ 0	$ 0
Trade receivables - third party and affiliates	(91)		(125)
Non-trade receivables, net	(940)		(873)
Inventories, net	(49)		(45)
Marketable securities, at fair value	0		0
Other assets	(111)		(83)
Total current assets	(1,191)		(1,126)
Investments in affiliates	(10,934)		(10,132)
Property, plant and equipment, net	0		0
Deferred income taxes	(4)		(18)
Other assets	(1,293)		(687)
Goodwill	0		0
Intangible assets, net	0		0
Total assets	(13,422)		(11,963)
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	(267)		(271)
Trade payables - third party and affiliates	(92)		(125)
Other liabilities	(292)		(165)
Deferred income taxes	0		0
Income taxes payable	(491)		(517)
Total current liabilities	(1,142)		(1,078)
Noncurrent Liabilities
Long-term debt, net of unamortized deferred financing costs	(1,300)		(694)
Deferred income taxes	(4)		(18)
Uncertain tax positions	(2)		(2)
Benefit obligations	0		0
Other liabilities	0		(1)
Total noncurrent liabilities	(1,306)		(715)
Total Celanese Corporation stockholders' equity	(10,974)		(10,170)
Noncontrolling interests	0		0
Total equity	(10,974)		(10,170)
Total liabilities and equity	$ (13,422)		$ (11,963)

[1] There were $0 million of accumulated impairment losses as of December 31, 2017.

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Consolidating Guarantor Financial Information (Schedule of Consolidating Cash Flow Statements) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 803	$ 893	$ 862
Investing Activities
Capital expenditures on property, plant and equipment	(267)	(246)	(232)
Acquisitions, net of cash acquired	(269)	(178)	(6)
Proceeds from sale of businesses and assets, net	1	12	4
Capital expenditures related to Fairway Methanol LLC	0	0	(288)
Return of capital from subsidiary	0	0	0
Contributions to subsidiary	0	0	0
Intercompany loan receipts (disbursements)	0	0	0
Other, net	(14)	(27)	(36)
Net cash provided by (used in) investing activities	(549)	(439)	(558)
Financing Activities
Short-term borrowings (repayments), net	111	(352)	350
Proceeds from short-term borrowings	182	53	80
Repayments of short-term borrowings	(124)	(90)	(83)
Proceeds from long-term debt	351	1,509	0
Repayments of long-term debt	(77)	(1,127)	(24)
Purchases of treasury stock, including related fees	(500)	(500)	(420)
Dividends to parent	0	0	0
Contributions from parent	0	0	0
Stock option exercises	1	6	3
Series A common stock dividends	(241)	(201)	(174)
Return of capital to parent	0	0	0
(Distributions to) contributions from noncontrolling interests	(27)	(24)	214
Other, net	(27)	(33)	(12)
Net cash provided by (used in) financing activities	(351)	(759)	(66)
Exchange rate effects on cash and cash equivalents	35	(24)	(51)
Net increase (decrease) in cash and cash equivalents	(62)	(329)	187
Cash and cash equivalents as of beginning of period	638	967	780
Cash and cash equivalents as of end of period	576	638	967
Parent Guarantor [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	740	695	591
Investing Activities
Capital expenditures on property, plant and equipment	0	0	0
Acquisitions, net of cash acquired	0	0	0
Proceeds from sale of businesses and assets, net	0	0	0
Capital expenditures related to Fairway Methanol LLC	0	0	0
Return of capital from subsidiary	0	0	0
Contributions to subsidiary	0	0	0
Intercompany loan receipts (disbursements)	0	0	0
Other, net	0	0	0
Net cash provided by (used in) investing activities	0	0	0
Financing Activities
Short-term borrowings (repayments), net	0	0	0
Proceeds from short-term borrowings	0	0	0
Repayments of short-term borrowings	0	0	0
Proceeds from long-term debt	0	0	0
Repayments of long-term debt	0	0	0
Purchases of treasury stock, including related fees	(500)	(500)	(420)
Dividends to parent	0	0	0
Contributions from parent	0	0	0
Stock option exercises	1	6	3
Series A common stock dividends	(241)	(201)	(174)
Return of capital to parent	0	0	0
(Distributions to) contributions from noncontrolling interests	0	0	0
Other, net	0	0	0
Net cash provided by (used in) financing activities	(740)	(695)	(591)
Exchange rate effects on cash and cash equivalents	0	0	0
Net increase (decrease) in cash and cash equivalents	0	0	0
Cash and cash equivalents as of beginning of period	0	0	0
Cash and cash equivalents as of end of period	0	0	0
Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	868	711	536
Investing Activities
Capital expenditures on property, plant and equipment	0	0	0
Acquisitions, net of cash acquired	(11)	0	0
Proceeds from sale of businesses and assets, net	0	0	0
Capital expenditures related to Fairway Methanol LLC	0	0	0
Return of capital from subsidiary	16	145	0
Contributions to subsidiary	0	0	0
Intercompany loan receipts (disbursements)	(530)	(283)	(333)
Other, net	0	0	0
Net cash provided by (used in) investing activities	(525)	(138)	(333)
Financing Activities
Short-term borrowings (repayments), net	56	(371)	383
Proceeds from short-term borrowings	0	0	0
Repayments of short-term borrowings	0	0	0
Proceeds from long-term debt	351	1,589	15
Repayments of long-term debt	(6)	(1,083)	(9)
Purchases of treasury stock, including related fees	0	0	0
Dividends to parent	741	695	592
Contributions from parent	0	0	0
Stock option exercises	0	0	0
Series A common stock dividends	0	0	0
Return of capital to parent	0	0	0
(Distributions to) contributions from noncontrolling interests	0	0	0
Other, net	(3)	(13)	0
Net cash provided by (used in) financing activities	(343)	(573)	(203)
Exchange rate effects on cash and cash equivalents	0	0	0
Net increase (decrease) in cash and cash equivalents	0	0	0
Cash and cash equivalents as of beginning of period	0	0	0
Cash and cash equivalents as of end of period	0	0	0
Subsidiary Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	425	(21)	529
Investing Activities
Capital expenditures on property, plant and equipment	(176)	(139)	(128)
Acquisitions, net of cash acquired	(12)	0	(3)
Proceeds from sale of businesses and assets, net	9	1	0
Capital expenditures related to Fairway Methanol LLC	0	0	(20)
Return of capital from subsidiary	241	758	0
Contributions to subsidiary	0	0	(120)
Intercompany loan receipts (disbursements)	(25)	19	(33)
Other, net	(2)	(10)	(12)
Net cash provided by (used in) investing activities	35	629	(316)
Financing Activities
Short-term borrowings (repayments), net	15	1	0
Proceeds from short-term borrowings	0	0	0
Repayments of short-term borrowings	0	0	0
Proceeds from long-term debt	530	746	406
Repayments of long-term debt	(2)	(635)	(74)
Purchases of treasury stock, including related fees	0	0	0
Dividends to parent	802	669	624
Contributions from parent	0	0	0
Stock option exercises	0	0	0
Series A common stock dividends	0	0	0
Return of capital to parent	0	0	0
(Distributions to) contributions from noncontrolling interests	0	0	0
Other, net	(22)	(21)	(10)
Net cash provided by (used in) financing activities	(281)	(578)	(302)
Exchange rate effects on cash and cash equivalents	0	0	0
Net increase (decrease) in cash and cash equivalents	179	30	(89)
Cash and cash equivalents as of beginning of period	51	21	110
Cash and cash equivalents as of end of period	230	51	21
Non-Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	593	872	422
Investing Activities
Capital expenditures on property, plant and equipment	(91)	(107)	(104)
Acquisitions, net of cash acquired	(274)	(178)	(3)
Proceeds from sale of businesses and assets, net	20	11	4
Capital expenditures related to Fairway Methanol LLC	0	0	(268)
Return of capital from subsidiary	0	0	0
Contributions to subsidiary	0	0	0
Intercompany loan receipts (disbursements)	0	90	(15)
Other, net	(12)	(17)	(24)
Net cash provided by (used in) investing activities	(357)	(201)	(410)
Financing Activities
Short-term borrowings (repayments), net	51	(1)	0
Proceeds from short-term borrowings	182	53	80
Repayments of short-term borrowings	(124)	(90)	(83)
Proceeds from long-term debt	14	0	0
Repayments of long-term debt	(69)	(42)	(14)
Purchases of treasury stock, including related fees	0	0	0
Dividends to parent	280	0	0
Contributions from parent	0	0	120
Stock option exercises	0	0	0
Series A common stock dividends	0	0	0
Return of capital to parent	(257)	(903)	0
(Distributions to) contributions from noncontrolling interests	(27)	(24)	214
Other, net	(2)	1	(2)
Net cash provided by (used in) financing activities	(512)	(1,006)	315
Exchange rate effects on cash and cash equivalents	35	(24)	(51)
Net increase (decrease) in cash and cash equivalents	(241)	(359)	276
Cash and cash equivalents as of beginning of period	587	946	670
Cash and cash equivalents as of end of period	346	587	946
Consolidation Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(1,823)	(1,364)	(1,216)
Investing Activities
Capital expenditures on property, plant and equipment	0	0	0
Acquisitions, net of cash acquired	28	0	0
Proceeds from sale of businesses and assets, net	(28)	0	0
Capital expenditures related to Fairway Methanol LLC	0	0	0
Return of capital from subsidiary	(257)	(903)	0
Contributions to subsidiary	0	0	120
Intercompany loan receipts (disbursements)	555	174	381
Other, net	0	0	0
Net cash provided by (used in) investing activities	298	(729)	501
Financing Activities
Short-term borrowings (repayments), net	(11)	19	(33)
Proceeds from short-term borrowings	0	0	0
Repayments of short-term borrowings	0	0	0
Proceeds from long-term debt	(544)	(826)	(421)
Repayments of long-term debt	0	633	73
Purchases of treasury stock, including related fees	0	0	0
Dividends to parent	(1,823)	(1,364)	(1,216)
Contributions from parent	0	0	(120)
Stock option exercises	0	0	0
Series A common stock dividends	0	0	0
Return of capital to parent	257	903	0
(Distributions to) contributions from noncontrolling interests	0	0	0
Other, net	0	0	0
Net cash provided by (used in) financing activities	1,525	2,093	715
Exchange rate effects on cash and cash equivalents	0	0	0
Net increase (decrease) in cash and cash equivalents	0	0	0
Cash and cash equivalents as of beginning of period	0	0	0
Cash and cash equivalents as of end of period	$ 0	$ 0	$ 0

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Consolidating Guarantor Financial Information (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2015
Consolidating Guarantor Financial Information [Abstract]
Issuer and subsidiary guarantors, ownership percentage	100.00%
Interest Allocated To Subsidiary Guarantor		$ 54

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Subsequent Events (Details) € in Millions, $ in Millions	Feb. 28, 2018 EUR (€)	Feb. 01, 2018 USD ($)	Dec. 31, 2017
Omni Plastics [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Payments to Acquire Businesses, Gross | $		$ 158
Advanced Engineered Materials [Member] | Omni Plastics [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired		100.00%
InfraServ GmbH & Co. Knapsack KG [Member]
Subsequent Event [Line Items]
Equity Method Investment, Ownership Percentage			27.00%
InfraServ GmbH & Co. Gendorf KG [Member]
Subsequent Event [Line Items]
Equity Method Investment, Ownership Percentage			39.00%
InfraServ GmbH & Co. Knapsack KG and InfraServ GmbH & Co. Gendorf KG [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Proceeds from Legal Settlements | €	€ 4
Maximum [Member] | InfraServ GmbH & Co. Knapsack KG [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Equity Method Investment, Ownership Percentage	27.00%
Maximum [Member] | InfraServ GmbH & Co. Gendorf KG [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Equity Method Investment, Ownership Percentage	39.00%
Minimum [Member] | InfraServ GmbH & Co. Knapsack KG [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Equity Method Investment, Ownership Percentage	22.00%
Minimum [Member] | InfraServ GmbH & Co. Gendorf KG [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Equity Method Investment, Ownership Percentage	30.00%