Celanese (CE) 10-K 7 Feb 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Jan. 31, 2019	Jun. 30, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	CELANESE CORPORATION
Entity Central Index Key	1,306,830
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Smaller Reporting Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		128,100,117
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 14,934,861,283

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Net sales	$ 7,155	$ 6,140	$ 5,389
Cost of sales	(5,183)	(4,629)	(3,984)
Gross profit	1,972	1,511	1,405
Selling, general and administrative expenses	(546)	(496)	(378)
Amortization of intangible assets	(24)	(20)	(9)
Research and development expenses	(72)	(73)	(78)
Other (charges) gains, net	9	(59)	(8)
Foreign exchange gain (loss), net	0	(1)	(1)
Gain (loss) on disposition of businesses and assets, net	(5)	(5)	3
Operating profit (loss)	1,334	857	934
Equity in net earnings (loss) of affiliates	233	183	155
Non-operating pension and other postretirement employee benefit (expense) income	(62)	44	(41)
Interest expense	(125)	(122)	(120)
Refinancing expense	(1)	0	(6)
Interest income	6	2	2
Dividend income - equity investments	117	108	108
Other income (expense), net	8	3	(2)
Earnings (loss) from continuing operations before tax	1,510	1,075	1,030
Income tax (provision) benefit	(292)	(213)	(122)
Earnings (loss) from continuing operations	1,218	862	908
Earnings (loss) from operation of discontinued operations	(5)	(16)	(3)
Gain (loss) on disposition of discontinued operations	0	0	0
Income tax (provision) benefit from discontinued operations	0	3	1
Earnings (loss) from discontinued operations	(5)	(13)	(2)
Net earnings (loss)	1,213	849	906
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	6	6	6
Net (earnings) loss attributable to noncontrolling interests	(6)	(6)	(6)
Net earnings (loss) attributable to Celanese Corporation	1,207	843	900
Amounts attributable to Celanese Corporation
Earnings (loss) from continuing operations	1,212	856	902
Earnings (loss) from discontinued operations	(5)	(13)	(2)
Net earnings (loss) attributable to Celanese Corporation	$ 1,207	$ 843	$ 900
Earnings (loss) per common share - basic
Continuing operations	$ 9.03	$ 6.21	$ 6.22
Discontinued operations	(0.04)	(0.10)	(0.01)
Net earnings (loss) - basic	8.99	6.11	6.21
Earnings (loss) per common share - diluted
Continuing operations	8.95	6.19	6.19
Discontinued operations	(0.04)	(0.10)	(0.01)
Net earnings (loss) - diluted	$ 8.91	$ 6.09	$ 6.18
Weighted average shares - basic	134,305,269	137,902,667	144,939,433
Weighted average shares - diluted	135,416,858	138,317,395	145,668,181

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 1,213	$ 849	$ 906
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	0	(1)	0
Foreign currency translation	(60)	174	(11)
Gain (loss) on cash flow hedges	(10)	(1)	5
Pension and postretirement benefits	0	9	(4)
Total other comprehensive income (loss), net of tax	(70)	181	(10)
Total comprehensive income (loss), net of tax	1,143	1,030	896
Comprehensive (income) loss attributable to noncontrolling interests	(6)	(6)	(6)
Comprehensive income (loss) attributable to Celanese Corporation	$ 1,137	$ 1,024	$ 890

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2018		Dec. 31, 2017
Current Assets
Cash and cash equivalents (variable interest entity restricted - 2018: $24; 2017: $19)	$ 439		$ 576
Trade receivables - third party and affiliates (net of allowance for doubtful accounts - 2018: $10; 2017: $9; variable interest entity restricted - 2018: $6; 2017: $5)	1,017		986
Non-trade receivables, net	301		244
Inventories	1,046		900
Marketable securities, at fair value	31		32
Other assets	40		54
Total current assets	2,874		2,792
Investments in affiliates	979		976
Property, plant and equipment (net of accumulated depreciation - 2018: $2,803; 2017: $2,584; variable interest entity restricted - 2018: $659; 2017: $697)	3,719		3,762
Deferred income taxes	84		366
Other assets (variable interest entity restricted - 2018: $5; 2017: $6)	290		338
Goodwill	1,057	[1]	1,003
Intangible assets, net (variable interest entity restricted - 2018: $23; 2017: $25)	310		301
Total assets	9,313		9,538
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	561		326
Trade payables - third party and affiliates	819		807
Other liabilities	343		354
Income taxes payable	56		72
Total current liabilities	1,779		1,559
Long-term debt, net of unamortized deferred financing costs	2,970		3,315
Deferred income taxes	255		211
Uncertain tax positions	158		156
Benefit obligations	564		585
Other liabilities	208		413
Commitments and Contingencies
Stockholders' Equity
Preferred stock, $0.01 par value, 100,000,000 shares authorized (2018 and 2017: 0 issued and outstanding)	0		0
Common stock, $0.0001 par value, 400,000,000 shares authorized (2018: 168,418,954 issued and 128,095,849 outstanding; 2017: 168,156,969 issued and 135,769,256 outstanding)	0		0
Treasury stock, at cost (2018: 40,323,105 shares; 2017: 32,387,713 shares)	(2,849)		(2,031)
Additional paid-in capital	233		175
Retained earnings	5,847		4,920
Accumulated other comprehensive income (loss), net	(247)		(177)
Total Celanese Corporation stockholders' equity	2,984		2,887
Noncontrolling interests	395		412
Total equity	3,379		3,299
Total liabilities and equity	$ 9,313		$ 9,538
[1]	There were $0 million of accumulated impairment losses as of December 31, 2018.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Current Assets
Allowance for doubtful accounts - trade receivables	$ 10	$ 9
Accumulated depreciation	2,803	2,584
Cash and cash equivalents (variable interest entity restricted - 2018: $24; 2017: $19)	439	576
Trade receivables - third party and affiliates (net of allowance for doubtful accounts - 2018: $10; 2017: $9; variable interest entity restricted - 2018: $6; 2017: $5)	1,017	986
Property, plant and equipment (net of accumulated depreciation - 2018: $2,803; 2017: $2,584; variable interest entity restricted - 2018: $659; 2017: $697)	3,719	3,762
Intangible assets, net (variable interest entity restricted - 2018: $23; 2017: $25)	310	301
Other assets (variable interest entity restricted - 2018: $5; 2017: $6)	$ 290	$ 338
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	40,323,105	32,387,713
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	400,000,000	400,000,000
Common stock, shares issued	168,418,954	168,156,969
Common stock, shares outstanding	128,095,849	135,769,256
Variable Interest Entity, Primary Beneficiary [Member]
Current Assets
Cash and cash equivalents (variable interest entity restricted - 2018: $24; 2017: $19)	$ 24	$ 19
Trade receivables - third party and affiliates (net of allowance for doubtful accounts - 2018: $10; 2017: $9; variable interest entity restricted - 2018: $6; 2017: $5)	6	5
Property, plant and equipment (net of accumulated depreciation - 2018: $2,803; 2017: $2,584; variable interest entity restricted - 2018: $659; 2017: $697)	659	697
Intangible assets, net (variable interest entity restricted - 2018: $23; 2017: $25)	23	25
Other assets (variable interest entity restricted - 2018: $5; 2017: $6)	$ 5	$ 6

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($) $ in Millions	Total		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, 2015			146,782,297	19,916,490
Balance as of the beginning of the period at Dec. 31, 2015								$ 451
Balance as of the beginning of the year at Dec. 31, 2015			$ 0	$ (1,031)	$ 136	3,621	$ (348)
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
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
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
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)
Cumulative Effect on Retained Earnings, Net of Tax						0
Stock option exercises, net of tax			$ 0		0
Stock option exercises, shares			0
Purchases of treasury stock, shares			(7,935,392)
Purchases of treasury stock			$ 0
Stock awards, shares			261,985
Stock awards			$ 0
Purchases of treasury stock, shares	7,933,692	[1]		7,935,392
Purchases of treasury stock, including related fees	$ (817)			$ (818)
Stock-based compensation, net of tax					58
Net earnings (loss) attributable to Celanese Corporation	1,207					1,207
Common stock dividends						(280)
Other comprehensive income (loss), net of tax	(70)						(70)
Balance as of the end of the year at Dec. 31, 2018	2,984		$ 0	$ (2,849)	$ 233	5,847	$ (247)
Balance as of the end of the period, shares at Dec. 31, 2018			128,095,849	40,323,105
Net earnings (loss) attributable to noncontrolling interests	6							6
(Distributions to) contributions from noncontrolling interests								(23)
Balance as of the end of the period at Dec. 31, 2018	395							$ 395
Total equity at Dec. 31, 2018	$ 3,379
Dividends, Share-based Compensation, Paid-in-kind						$ 0
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests									$ 0
[1]	Excludes 1,700 common shares reacquired pursuant to an employee clawback agreement.

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Cash Flows [Abstract]
Net earnings (loss)	$ 1,213	$ 849	$ 906
Adjustments to reconcile net earnings (loss) to net cash provided by (used in) operating activities
Asset impairments	0	0	2
Depreciation, amortization and accretion	349	310	295
Pension and postretirement net periodic benefit cost	(92)	(80)	(54)
Pension and postretirement contributions	(47)	(363)	(350)
Actuarial (gain) loss on pension and postretirement plans	165	46	103
Pension curtailments and settlements, net	(1)	0	0
Deferred income taxes, net	137	(152)	83
(Gain) loss on disposition of businesses and assets, net	7	5	2
Stock-based compensation	71	47	31
Undistributed earnings in unconsolidated affiliates	(12)	(52)	(24)
Other, net	26	12	15
Operating cash provided by (used in) discontinued operations	(10)	8	2
Changes in operating assets and liabilities
Trade receivables - third party and affiliates, net	(48)	(110)	(59)
Inventories	(158)	(97)	8
Other assets	(113)	(7)	39
Trade payables - third party and affiliates	15	126	7
Other liabilities	56	261	(113)
Net cash provided by (used in) operating activities	1,558	803	893
Investing Activities
Capital expenditures on property, plant and equipment	(337)	(267)	(246)
Acquisitions, net of cash acquired	(144)	(269)	(178)
Proceeds from sale of businesses and assets, net	13	1	12
Other, net	(39)	(14)	(27)
Net cash provided by (used in) investing activities	(507)	(549)	(439)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	(38)	111	(352)
Proceeds from short-term borrowings	51	182	53
Repayments of short-term borrowings	(78)	(124)	(90)
Proceeds from long-term debt	561	351	1,509
Repayments of long-term debt	(536)	(77)	(1,127)
Purchases of treasury stock, including related fees	(805)	(500)	(500)
Stock option exercises	0	1	6
Common stock dividends	(280)	(241)	(201)
(Distributions to) contributions from noncontrolling interests	(23)	(27)	(24)
Other, net	(17)	(27)	(33)
Net cash provided by (used in) financing activities	(1,165)	(351)	(759)
Exchange rate effects on cash and cash equivalents	(23)	35	(24)
Net increase (decrease) in cash and cash equivalents	(137)	(62)	(329)
Cash and cash equivalents as of beginning of period	576	638	967
Cash and cash equivalents as of end of period	$ 439	$ 576	$ 638

Description of the Company and

Description of the Company and Basis of Presentation	12 Months Ended
	Dec. 31, 2018
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 produces high performance engineered polymers that are used in a variety of high-value applications, as well as acetyl products, which are intermediate chemicals for nearly all major industries. The Company also engineers and manufactures a wide variety of products essential to everyday living. The Company's 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. 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 primarily due to (1) adoption of ASU 2017-07 (defined below in Note 3 ) and (2) to conform to the presentation of the Company's current reportable segments ( Note 26 ).

Summary of Accounting Policies

Summary of Accounting Policies	12 Months Ended
	Dec. 31, 2018
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. Legal Proceedings 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 in equity securities 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 in equity securities where the Company does not exercise significant influence are accounted for at fair value or, if such investments do not have a readily determinable fair value, an election may be made to measure them at cost after considering observable price changes for similar instruments, minus impairment, if any. 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. Further, these investments were determined not to have a readily determinable fair value. Accordingly, these investments are accounted for using the alternative measure described above. 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. • Interest Rate Risk Management The Company entered into a forward-starting interest rate swap to mitigate the risk of variability in the benchmark interest rate for an expected debt issuance in 2021. The interest rate swap agreement is designated as a cash flow hedge. Accordingly, to the extent the cash flow hedge is effective, changes in the fair value of the interest rate swap are included in gain (loss) from cash flow hedges within Accumulated other comprehensive income (loss), net in the consolidated balance sheets. Hedge accounting is discontinued when the interest rate swap is no longer effective in offsetting cash flows attributable to the hedged risk, the interest rate swap expires or the cash flow hedge is dedesignated because it is no longer probable that the forecasted transaction will occur according to the original strategy. • 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

Recent Accounting Pronouncement

Recent Accounting Pronouncements	12 Months Ended
	Dec. 31, 2018
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 2018, the FASB issued ASU 2018-14, Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans. The new guidance modifies the disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans by removing disclosures that no longer are considered cost beneficial, clarifying the specific requirements of disclosures and adding disclosure requirements identified as relevant. January 1, 2020. Early adoption is permitted. The Company is currently evaluating the impact of adoption on its financial statement disclosures. In February 2018, the FASB issued ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The new guidance allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act and will improve the usefulness of information reported to financial statement users. January 1, 2019. Early adoption is permitted. The Company has completed its assessment and will adopt the new guidance effective January 1, 2019. The adoption of the new guidance will not have a material impact to the Company. 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 adopted the new guidance effective January 1, 2018, as part of the FASB's simplification initiative. The adoption of the new guidance did not have a material impact to the Company. 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. The Company adopted the new guidance effective January 1, 2018, using the retrospective transition method, as part of the FASB's simplification initiative. See Adoption of ASU 2017-07 section below for additional information. 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. The Company adopted the new guidance effective January 1, 2018, as part of the FASB's simplification initiative. The adoption of the new guidance did not have a material impact to the Company. 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. The Company adopted the new guidance effective January 1, 2018, as part of the FASB's simplification initiative. The adoption of the new guidance did not have a material impact to the Company. In February 2016, the FASB issued ASU 2016-02, Leases. Since that date, the FASB has issued additional ASUs clarifying certain aspects of ASU 2016-02. 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. Subsequent guidance issued after February 2016 did not change the core principle of ASU 2016-02. January 1, 2019. Early adoption is permitted. The Company has substantially completed evaluating its population of leases, and the most significant impact relates to its accounting for manufacturing and logistics equipment, and real estate operating leases. The Company currently anticipates recognition of additional assets and corresponding liabilities related to leases of approximately $225 million upon adoption. The Company plans to adopt the standard effective January 1, 2019, utilizing the modified retrospective transition method. Standard Description Effective Date Effect on the Financial Statements or Other Significant Matters 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. The Company adopted the new guidance effective January 1, 2018, using the modified retrospective approach, as part of the FASB's simplification initiative. The new guidance resulted in a cumulative-effect adjustment of less than $1 million to January 1, 2018 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. The Company adopted the new guidance effective January 1, 2018, using the modified retrospective approach, as part of the FASB's simplification initiative. The adoption of the new guidance resulted in less than $1 million impact to the consolidated financial statements and related disclosures (See Note 27 ). Adoption of ASU 2017-07 ASU 2017-07 requires an entity to report the service cost component of net benefit cost in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the statement of operations separately from the service cost component and outside a subtotal of Operating profit (loss). The new guidance represents a change in accounting principle. The Company adopted ASU 2017-07 on January 1, 2018 using the retrospective transition method. The adoption of this accounting standard resulted in a change in certain previously reported amounts, as follows: Year Ended December 31, 2017 As previously reported Adoption of ASU 2017-07 As Adjusted (In $ millions) Cost of sales (4,625 ) (4 ) (4,629 ) Selling, general and administrative expenses (456 ) (40 ) (496 ) Research and development expenses (72 ) (1 ) (73 ) Other (charges) gains, net (60 ) 1 (59 ) Operating profit (loss) 901 (44 ) 857 Non-operating pension and other postretirement employee benefit (expense) income — 44 44 Year Ended December 31, 2016 As previously reported Adoption of ASU 2017-07 As Adjusted (In $ millions) Selling, general and administrative expenses (416 ) 38 (378 ) Other (charges) gains, net (11 ) 3 (8 ) Operating profit (loss) 893 41 934 Non-operating pension and other postretirement employee benefit (expense) income — (41 ) (41 )

Acquisitions, Dispositions and

Acquisitions, Dispositions and Plant Closures	12 Months Ended
	Dec. 31, 2018
Acquisitions, Dispositions and Plant Closures [Abstract]
Acquisitions, Dispositions and Plant Closures [Text Block]	Acquisitions, Dispositions and Plant Closures Acquisitions • Omni Plastics On February 1, 2018, using cash on hand and borrowings under the Company's senior unsecured revolving credit facility, the Company acquired 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 was accounted for as a business combination and the acquired operations are included in the 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 of certain assets were determined based on Level 3 inputs including 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 was 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. However, 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 Omni Plastics acquisition is as follows: As of (In $ millions) Cash and cash equivalents 2 Trade receivables - third party and affiliates 12 Inventories 13 Property, plant and equipment, net 19 Intangible assets ( Note 11 ) 35 Goodwill ( Note 11 ) (1) 84 Other assets 1 Total fair value of assets acquired 166 Trade payables - third party and affiliates (8 ) Total debt ( Note 14 ) (12 ) Total fair value of liabilities assumed (20 ) Net assets acquired 146 ______________________________ (1) Goodwill consists of expected revenue and operating synergies resulting from the acquisition, all of which is deductible for income tax purposes. The amount of pro forma Net earnings (loss) of Omni Plastics 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 2018. The amount of Omni Plastics' Net earnings (loss) consolidated by the Company since the acquisition date was not material. • Acetate Tow Joint Venture In June 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 would combine substantially all of the operations of the Company's Acetate Tow business and the operations of the Rhodia Acetow cellulose acetate business formerly operated by Solvay S.A. and acquired by the Blackstone Entities in June 2017. The parties were subsequently unable to reach an agreement with the European Commission on acceptable conditions to allow the proposed joint venture to proceed. The demands by the European Commission eliminated the primary advantages of the transaction. As a result, on March 19, 2018, the Company and the Blackstone Entities abandoned their agreement to form the proposed joint venture. • Nilit Plastics In May 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 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 measurement period, 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. Plant Closures • Ocotlán, Mexico On June 6, 2018, the Company announced the consolidation of its global acetate manufacturing operations by initiating the closure of its acetate tow manufacturing unit in Ocotlán, Mexico. The acetate flake unit will remain operational and is unaffected by these actions. The Ocotlán, Mexico operations are included in the Company's Acetate Tow segment. The exit and shutdown costs related to this closure are as follows: Year Ended December 31, 2018 (In $ millions) Restructuring (1) 2 Accelerated depreciation expense 15 Loss on disposition of assets, net 1 Other 1 Total 19 ______________________________ (1) Included in Other (charges) gains, net in the consolidated statement of operations ( Note 18 ). The Company does not expect to incur significant exit and shutdown costs in 2019.

Ventures and Variable Interest

Ventures and Variable Interest Entities	12 Months Ended
	Dec. 31, 2018
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 Chain 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, 2018 2017 (In $ millions) Cash and cash equivalents 24 19 Trade receivables, net - third party & affiliates 11 9 Property, plant and equipment (net of accumulated depreciation - 2018: $130; 2017: $90) 659 697 Intangible assets (net of accumulated amortization - 2018: $3; 2017: $2) 23 25 Other assets 5 6 Total assets (1) 722 756 Trade payables 16 16 Other liabilities (2) 4 4 Total debt 5 5 Deferred income taxes 3 3 Total liabilities 28 28 ______________________________ (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, 2018 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, 2018 2017 (In $ millions) Property, plant and equipment, net 42 53 Trade payables 27 25 Current installments of long-term debt 14 18 Long-term debt 57 76 Total liabilities 98 119 Maximum exposure to loss 133 164 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 ).

Marketable Securities, at Fair

Marketable Securities, at Fair Value	12 Months Ended
	Dec. 31, 2018
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, 2018 2017 (In $ millions) Amortized cost 31 32 Gross unrealized gain — — Gross unrealized loss — — Fair value 31 32

Receivables, Net

Receivables, Net	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Receivables, Net	Receivables, Net As of December 31, 2018 2017 (In $ millions) Trade receivables - third party and affiliates 1,027 995 Allowance for doubtful accounts - third party and affiliates (10 ) (9 ) Trade receivables - third party and affiliates, net 1,017 986 As of December 31, 2018 2017 (In $ millions) Non-income taxes receivable 176 81 Reinsurance receivables 14 16 Income taxes receivable 26 64 Other 85 83 Non-trade receivables, net 301 244

Inventories

Inventories	12 Months Ended
	Dec. 31, 2018
Inventory Disclosure [Abstract]
Inventories	Inventories As of December 31, 2018 2017 (In $ millions) Finished goods 697 591 Work-in-process 70 57 Raw materials and supplies 279 252 Total 1,046 900

Investments in Affiliates

Investments in Affiliates	12 Months Ended
	Dec. 31, 2018
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 equity method of accounting or equity investments without readily determinable fair values 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 December 31, Carrying December 31, Share of December 31, Dividends and December 31, 2018 2017 2018 2017 2018 2017 2016 2018 2017 2016 (In percentages) (In $ millions) Engineered Materials Ibn Sina 25 25 164 178 96 58 38 (112 ) (1 ) (18 ) InfraServ GmbH & Co. Hoechst KG (1) 32 32 129 139 20 19 — (25 ) (26 ) — Fortron Industries LLC 50 50 122 111 14 17 9 (3 ) (6 ) (9 ) Korea Engineering Plastics Co., Ltd. 50 50 150 155 29 25 25 (27 ) (25 ) (11 ) Polyplastics Co., Ltd. 45 45 196 170 64 57 50 (45 ) (64 ) (54 ) Sherbrooke Capital Health and (2) 10 10 2 3 — 1 — — — — Other Activities (3) InfraServ GmbH & Co. Gendorf KG (4) 30 39 36 41 7 4 7 (5 ) (5 ) (5 ) InfraServ GmbH & Co. Hoechst KG (1) — — — — — — 22 — — (30 ) InfraServ GmbH & Co. Knapsack KG (4) 22 27 16 20 3 2 4 (4 ) (4 ) (4 ) Total 815 817 233 183 155 (221 ) (131 ) (131 ) ______________________________ (1) InfraServ GmbH & Co. Hoechst KG is owned primarily by an entity included in the Company's 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 Acetyl Chain segment also holds an ownership percentage. (2) 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. (3) 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. (4) See Note 18 for further information. Financial information for Ibn Sina is not provided to the Company on a timely basis and as a result, the Company's proportional share is reported on a one quarter lag. Accordingly, summarized financial information for Ibn Sina is as follows: As of September 30, 2018 2017 (In $ millions) Current assets 448 410 Noncurrent assets 825 833 Current liabilities 200 194 Noncurrent liabilities 450 499 Twelve Months Ended September 30, 2018 2017 2016 (In $ millions) Revenues 913 759 563 Gross profit 396 306 208 Net income 322 256 171 Equity Investments Without Readily Determinable Fair Values Equity investments without readily determinable fair values and ownership interests by business segment are as follows: Ownership December 31, Carrying as of December 31, Dividend December 31, 2018 2017 2018 2017 2018 2017 2016 (In percentages) (In $ millions) Acetate Tow Kunming Cellulose Fibers Co. Ltd. 30 30 14 14 12 12 14 Nantong Cellulose Fibers Co. Ltd. 31 31 115 109 87 81 80 Zhuhai Cellulose Fibers Co. Ltd. 30 30 30 30 13 14 13 Other Activities InfraServ GmbH & Co. Wiesbaden KG 8 8 5 5 1 1 1 Other — 1 4 — — Total 164 159 117 108 108 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 at cost less impairment, adjusted for observable price changes for an identical or similar investment of the same issuer. 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, 2018 2017 2016 (In $ millions) Purchases 305 250 203 Sales and other credits 117 77 43 Interest expense 1 — — As of December 31, 2018 2017 (In $ millions) Non-trade receivables 29 21 Total due from affiliates 29 21 Short-term borrowings (1) 50 32 Trade payables 46 36 Current Other liabilities 11 8 Total due to affiliates 107 76 ______________________________ (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.

Property, Plant and Equipment,

Property, Plant and Equipment, Net	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment, Net [Abstract]
Property, Plant and Equipment, Net	Property, Plant and Equipment, Net As of December 31, 2018 2017 (In $ millions) Land 46 47 Land improvements 77 72 Buildings and building improvements 760 758 Machinery and equipment 5,223 5,101 Construction in progress 416 368 Gross asset value 6,522 6,346 Accumulated depreciation (2,803 ) (2,584 ) Net book value 3,719 3,762 Assets under capital leases, net, included in the amounts above are as follows: As of December 31, 2018 2017 (In $ millions) Buildings 14 14 Machinery and equipment 279 296 Accumulated depreciation (188 ) (179 ) Net book value 105 131 Capitalized interest costs and depreciation expense are as follows: Year Ended December 31, 2018 2017 2016 (In $ millions) Capitalized interest 10 6 5 Depreciation expense 319 285 281 No long-lived assets were impaired during 2018 . During 2017 and 2016 , certain long-lived assets were impaired ( Note 18 ).

Goodwill and Intangible Assets,

Goodwill and Intangible Assets, Net	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets, Net	oodwill and Intangible Assets, Net Goodwill Engineered Acetate Tow Acetyl Total (In $ millions) As of December 31, 2016 462 148 186 796 Acquisitions ( Note 4 ) 128 — — 128 Exchange rate changes 53 1 25 79 As of December 31, 2017 643 149 211 1,003 Acquisitions ( Note 4 ) 84 — — 84 Exchange rate changes (20 ) (1 ) (9 ) (30 ) As of December 31, 2018 (1) 707 148 202 1,057 ______________________________ (1) There were $0 million of accumulated impairment losses as of December 31, 2018 . 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, 2018 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, 2018 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, 2016 36 509 35 53 633 Acquisitions ( Note 4 ) — 73 9 — 82 (1) Exchange rate changes 2 58 1 1 62 As of December 31, 2017 38 640 45 54 777 Acquisitions ( Note 4 ) — 32 — 3 35 (2) Renewals 6 (3 ) — — — 6 Exchange rate changes (2 ) (21 ) (1 ) (1 ) (25 ) As of December 31, 2018 42 651 44 56 793 Accumulated Amortization 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 ) Amortization (2 ) (16 ) (3 ) (3 ) (24 ) Exchange rate changes 2 17 1 — 20 As of December 31, 2018 (33 ) (495 ) (32 ) (35 ) (595 ) Net book value 9 156 12 21 198 ______________________________ (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 Omni Plastics ( Note 4 ) during the year ended December 31, 2018 , with a weighted average amortization period of 11 years . (3) During the year ended December 31, 2018 , the Company extended a research and development technology agreement license, which will be amortized over a period of 5 years. Indefinite-lived intangible assets are as follows: Trademarks and Trade Names (In $ millions) As of December 31, 2016 85 Acquisitions ( Note 4 ) 22 Exchange rate changes 8 As of December 31, 2017 115 Acquisitions ( Note 4 ) — Exchange rate changes (3 ) As of December 31, 2018 112 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, 2018 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, 2018 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. Estimated amortization expense for the succeeding five fiscal years is as follows: (In $ millions) 2019 22 2020 20 2021 19 2022 17 2023 15

Current Other Liabilities

Current Other Liabilities	12 Months Ended
	Dec. 31, 2018
Other Liabilities, Current [Abstract]
Current Other Liabilities	Current Other Liabilities As of December 31, 2018 2017 (In $ millions) Asset retirement obligations 3 19 Benefit obligations ( Note 15 ) 30 30 Customer rebates 76 65 Derivatives ( Note 22 ) 7 3 Environmental ( Note 16 ) 20 14 Insurance 4 5 Interest 21 17 Restructuring ( Note 18 ) 4 5 Salaries and benefits 119 113 Sales and use tax/foreign withholding tax payable 22 16 Other 37 67 Total 343 354

Noncurrent Other Liabilities

Noncurrent Other Liabilities	12 Months Ended
	Dec. 31, 2018
Other Liabilities, Noncurrent [Abstract]
Noncurrent Other Liabilities	Noncurrent Other Liabilities As of December 31, 2018 2017 (In $ millions) Asset retirement obligations 13 7 Deferred proceeds 44 47 Deferred revenue 7 6 Derivatives ( Note 22 ) 11 — Environmental ( Note 16 ) 49 59 Income taxes payable ( Note 19 ) — 197 Insurance 37 43 Other 47 54 Total 208 413 Changes in asset retirement obligations are as follows: Year Ended December 31, 2018 2017 2016 (In $ millions) Balance at beginning of year 26 29 36 Additions (1) 2 — 2 Accretion — 1 1 Payments (4 ) (5 ) (10 ) Revisions to cash flow estimates (2) (8 ) 1 — Balance at end of year 16 26 29 ______________________________ (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 year ended 2017 was $10 million related to indemnifications received for a business acquired in 2005. The corresponding indemnification receivable is included in Non-trade receivables, net in the consolidated balance sheet as of December 31, 2017. The asset retirement obligation related to the indemnification receivable was completed during 2018.

Debt

Debt	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Debt	Debt As of December 31, 2018 2017 (In $ millions) Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates Current installments of long-term debt 367 63 Short-term borrowings, including amounts due to affiliates (1) 77 86 Revolving credit facility (2) 40 97 Accounts receivable securitization facility (3) 77 80 Total 561 326 ______________________________ (1) The weighted average interest rate was 3.2% and 3.4% as of December 31, 2018 and 2017 , respectively. (2) The weighted average interest rate was 6.0% and 4.1% as of December 31, 2018 and 2017 , respectively. (3) The weighted average interest rate was 3.1% and 2.1% as of December 31, 2018 and 2017 , respectively. As of December 31, 2018 2017 (In $ millions) Long-Term Debt Senior unsecured term loan due 2021 (1) — 494 Senior unsecured notes due 2019, interest rate of 3.250% 343 360 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% 857 897 Senior unsecured notes due 2025, interest rate of 1.250% 343 359 Senior unsecured notes due 2027, interest rate of 2.125% 568 — Pollution control and industrial revenue bonds due at various dates through 2030, interest rates ranging from 4.05% to 5.00% 167 169 Nilit bank loans due at various dates through 2026 ( Note 4 ) (2) 10 11 Obligations under capital leases due at various dates through 2054 167 208 Subtotal 3,355 3,398 Unamortized debt issuance costs (3) (18 ) (20 ) Current installments of long-term debt (367 ) (63 ) Total 2,970 3,315 ______________________________ (1) The margin for borrowings under the senior unsecured term loan due 2021 was 1.5% above LIBOR at Celanese credit ratings as of December 31, 2017 . (2) The weighted average interest rate was 1.3% and 1.3% as of December 31, 2018 and 2017 , respectively. (3) 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, 2018 (In $ millions) Revolving Credit Facility Borrowings outstanding (1) 40 Letters of credit issued — Available for borrowing 960 ______________________________ (1) The Company borrowed $940 million and repaid $997 million under its senior unsecured revolving credit facility during the year ended December 31, 2018 . See Note 30 for further information. 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 November 5, 2018, Celanese US completed an offering of €500 million in principal amount of 2.125% senior unsecured notes due March 1, 2027 (the " 2.125% Notes") in a public offering registered under the Securities Act. The 2.125% Notes were issued under a base indenture dated May 6, 2011. The 2.125% Notes were issued at a discount to par at a price of 99.231% , which is being amortized to Interest expense in the consolidated statements of operations over the term of the 2.125% Notes. Net proceeds from the sale of the 2.125% Notes were used to repay $463 million of the senior unsecured term loan and for general corporate purposes. In December 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. 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. 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, 2018 (In $ millions) Accounts Receivable Securitization Facility Borrowings outstanding (1) 77 Letters of credit issued 29 Available for borrowing 14 Total borrowing base 120 Maximum borrowing base (2) 120 ______________________________ (1) The Company borrowed $25 million and repaid $28 million during the year ended December 31, 2018 . (2) Outstanding accounts receivable transferred to the SPE was $185 million . Other Financing Arrangements On June 25, 2018, the Company entered into a factoring agreement with a global financial institution to sell certain accounts receivable on a non-recourse basis. These transactions are treated as a sale and are accounted for as a reduction in accounts receivable because the agreement transfers effective control over and risk related to the receivables to the buyer. The Company has no continuing involvement in the transferred receivables, other than collection and administrative responsibilities and, once sold, the accounts receivable are no longer available to satisfy creditors in the event of bankruptcy. The Company de-recognized $117 million of accounts receivable during the year ended December 31, 2018 . Principal payments scheduled to be made on the Company's debt, including short-term borrowings, are as follows: (In $ millions) 2019 561 2020 27 2021 430 2022 524 2023 875 Thereafter 1,132 Total 3,549 Net deferred financing costs are as follows: (In $ millions) As of December 31, 2015 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 Financing costs deferred (5) 4 Accelerated amortization due to refinancing activity (1 ) Amortization (6 ) As of December 31, 2018 (1) 21 ____________________________ (1) Includes $3 million , $4 million and $6 million as of December 31, 2018 , 2017 and 2016 , 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. (5) Related to the 2.125% Notes, which are being amortized through the term of the 2.125% 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, 2018 .

Benefit Obligations

Benefit Obligations	12 Months Ended
	Dec. 31, 2018
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 2018 unaudited and 2017 audited multiemployer defined benefit plan's financial statements, the plan is 100% funded in 2018 , 2017 and 2016 . The number of employees covered by the Company's multiemployer defined benefit plan remained relatively stable year over year from 2016 to 2018 , 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, 2018 2017 2016 (In $ millions) Multiemployer defined benefit plan 8 7 7 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, 2018 2017 (In $ millions) Postemployment benefits 8 8 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, 2018 2017 2016 (In $ millions) Defined contribution plans 40 40 43 Summarized information on the Company's pension and postretirement benefit plans is as follows: Pension Benefits Postretirement Benefits 2018 2017 2018 2017 (In $ millions) Change in Projected Benefit Obligation Projected benefit obligation as of beginning of period 3,728 3,610 66 67 Service cost 9 9 1 1 Interest cost 104 107 2 1 Net actuarial (gain) loss (1) (163 ) 151 (4 ) (2 ) Settlements — (1 ) — — Benefits paid (235 ) (233 ) (4 ) (4 ) Curtailments (1 ) — — — Special termination benefits 2 1 — — Exchange rate changes (32 ) 69 (2 ) 3 Other (2) — 15 — — Projected benefit obligation as of end of period 3,412 3,728 59 66 Change in Plan Assets Fair value of plan assets as of beginning of period 3,251 2,784 — — Actual return on plan assets (124 ) 302 — — Employer contributions 43 359 4 4 Settlements — (1 ) — — Benefits paid (3) (235 ) (233 ) (4 ) (4 ) Exchange rate changes (20 ) 40 — — Fair value of plan assets as of end of period 2,915 3,251 — — Funded status as of end of period (497 ) (477 ) (59 ) (66 ) Amounts Recognized in the Consolidated Balance Sheets Consist of: Noncurrent Other assets 30 64 — — Current Other liabilities (24 ) (24 ) (5 ) (5 ) Benefit obligations (503 ) (517 ) (54 ) (61 ) Net amount recognized (497 ) (477 ) (59 ) (66 ) Amounts Recognized in Accumulated Other Comprehensive Income Consist of: Net actuarial (gain) loss (4) 8 9 — — Prior service (benefit) cost — (1 ) — 1 Net amount recognized (5) 8 8 — 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, 2018 and 2017 , respectively. (4) Relates to the pension plans of the Company's equity method investments. (5) Amount shown net of an income tax benefit of $5 million and $6 million as of December 31, 2018 and 2017 , 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 Postretirement Benefits 2018 2017 2018 2017 (In percentages) US plans 82 83 57 54 International plans 18 17 43 46 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 2018 2017 (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, 2018 2017 (In $ millions) Projected benefit obligation 840 882 Fair value of plan assets 314 341 Pension plans with accumulated benefit obligations in excess of plan assets are as follows: As of December 31, 2018 2017 (In $ millions) Accumulated benefit obligation 749 861 Fair value of plan assets 243 338 The accumulated benefit obligation for all defined benefit pension plans is as follows: As of December 31, 2018 2017 (In $ millions) Accumulated benefit obligation 3,390 3,710 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 Postretirement Benefits 2018 2017 2016 2018 2017 2016 (In $ millions) Service cost 9 9 8 1 1 — Interest cost 104 107 113 2 1 2 Expected return on plan assets (210 ) (198 ) (177 ) — — — Amortization of prior service cost / (credit) — — — — (1 ) (3 ) Recognized actuarial (gain) loss 169 48 101 (4 ) (2 ) 2 Curtailment (gain) loss (1 ) — — — — — Special termination benefit 2 1 3 — — — Total 73 (33 ) 48 (1 ) (1 ) 1 Amortization of Accumulated other comprehensive income (loss), net into net periodic benefit cost in 2019 is expected to be as follows: Pension Benefits Postretirement Benefits (In $ millions) Prior service cost — — Total — — The Company maintains nonqualified pension plans funded with nonqualified trusts for certain US employees as follows: As of December 31, 2018 2017 (In $ millions) Nonqualified Trust Assets Marketable securities, at fair value 31 32 Noncurrent Other assets, consisting of insurance contracts 37 42 Nonqualified Pension Obligations Current Other liabilities 21 22 Benefit obligations 213 237 (Income) 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, 2018 2017 2016 (In $ millions) Total (3 ) 18 18 Valuation The principal weighted average assumptions used to determine benefit obligation are as follows: Pension Benefits Postretirement Benefits 2018 2017 2018 2017 (In percentages) Discount Rate Obligations US plans 4.2 3.5 4.1 3.4 International plans 2.1 2.1 3.4 3.2 Combined 3.8 3.3 3.8 3.2 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 Postretirement Benefits 2018 2017 2016 2018 2017 2016 (In percentages) Discount Rate Obligations US plans 3.5 3.9 4.2 3.4 3.8 4.0 International plans 2.1 2.1 2.6 3.2 3.3 3.6 Combined 3.3 3.7 4.0 3.2 3.4 3.9 Discount Rate Service Cost (1) US plans 1.9 1.2 4.5 3.7 4.0 4.2 International plans 2.3 2.5 3.1 3.3 3.4 3.8 Combined 2.2 2.5 3.1 2.9 2.9 3.8 Discount Rate Interest Cost (1) US plans 3.1 3.3 3.4 3.0 3.1 3.1 International plans 1.7 1.7 2.2 2.9 2.9 3.1 Combined 2.9 3.1 3.2 2.9 2.9 3.1 Expected Return on Plan Assets US plans 6.8 7.5 7.5 International plans 5.9 5.9 6.1 Combined 6.7 7.3 7.3 Rate of Compensation Increase US plans N/A N/A N/A International plans 2.8 2.8 2.7 Combined 2.8 2.8 2.7 ______________________________ (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, 2018 2017 2016 (In percentages, except year) Health care cost trend rate assumed for next year 8.5 9.0 9.5 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 1.5 1.8 Service and interest cost — — Plan Assets The weighted average target asset allocations for the Company's pension plans in 2018 are as follows: US Plans International Plans (In percentages) Bonds - domestic to plans 80 59 Equities - domestic to plans 10 16 Equities - international to plans 10 — Other — 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, 2018 was (4.1)% versus an expected long-term rate of asset return assumption of 6.8% . The expected long-term rate of asset return assumption used to determine 2019 net periodic benefit cost is 6.7% 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, 2018 2017 2018 2017 2018 2017 (In $ millions) Assets Cash and cash equivalents 2 5 — — 2 5 Derivatives Swaps — — 3 8 3 8 Equity securities International companies 59 72 — — 59 72 Fixed income Corporate debt — — 691 776 691 776 Treasuries, other debt 127 48 1,293 1,411 1,420 1,459 Mortgage backed securities — — 8 7 8 7 Insurance contracts — — 35 36 35 36 Other 4 4 1 1 5 5 Total investments, at fair value (1) 192 129 2,031 2,239 2,223 2,368 Liabilities Derivatives Swaps — — 3 7 3 7 Total liabilities — — 3 7 3 7 Total net assets (2) 192 129 2,028 2,232 2,220 2,361 ______________________________ (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, 2018 excludes investments in common/collective trusts, registered investment companies and short-term investment funds with fair values of $595 million , $54 million and $29 million , respectively. 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. (2) Total net assets excludes non-financial plan receivables and payables of $36 million and $19 million , respectively, as of December 31, 2018 and $25 million and $18 million , respectively, as of December 31, 2017 . Non-financial items include due to/from broker, interest receivables and accrued expenses. Benefit obligation funding is as follows: Total Expected 2019 (In $ millions) Cash contributions to defined benefit pension plans 22 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) 2019 234 5 2020 232 4 2021 227 4 2022 225 4 2023 224 4 2024-2028 1,072 18 ______________________________ (1) Payments are expected to be made primarily from plan assets. (2) Payments are expected to be made primarily from Company assets.

Environmental

Environmental	12 Months Ended
	Dec. 31, 2018
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 ongoing 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, 2018 2017 (In $ millions) Demerger obligations ( Note 24 ) 26 28 Divestiture obligations ( Note 24 ) 16 17 Active sites 14 15 US Superfund sites 11 11 Other environmental remediation reserves 2 2 Total 69 73 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 2018 or have any receivables for insurance recoveries related to these matters as of December 31, 2018 . As of December 31, 2018 and 2017 , there were receivables of $3 million and $3 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, 2018 Ownership Liability Reserves (1) (In percentages) (In $ millions) InfraServ GmbH & Co. Gendorf KG 30 10 8 InfraServ GmbH & Co. Hoechst KG 32 40 69 InfraServ GmbH & Co. Knapsack KG 22 22 1 ______________________________ (1) Gross reserves maintained by the respective InfraServ entity. 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 the 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 ("LPRSA"), 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. In March 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 contaminants of concern to the Passaic River. On June 30, 2018, Occidental Chemical Corporation ("OCC"), the successor to the Diamond Alkali Company, sued a subsidiary of the Company and 119 other parties alleging claims for joint and several damages, contribution and declaratory relief under Section 107 and 113 of Superfund for costs to clean up the LPRSA portion of the Diamond Alkali Superfund Site, Occidental Chemical Corporation v. 21st Century Fox America, Inc., et al , No. 2:18-CV-11273-JLL-JAD (U.S. District Court New Jersey), alleging that each of the defendants owned or operated a facility that contributed contamination to the LPRSA. With respect to the Company, the OCC lawsuit is limited to the former Celanese facility that Essex County, New Jersey has agreed to indemnify the Company for and does not change the Company's estimated liability for LPRSA cleanup costs. The Company is vigorously defending these matters 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.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2018
Stockholders' Equity Note [Abstract]
Stockholders' Equity	Stockholders' Equity Common Stock On September 17, 2018, the Company filed with the Secretary of State of Delaware a Certificate of Amendment (the "Certificate of Amendment") to its Second Amended and Restated Certificate of Incorporation, as amended, to remove all references to the Company's Series B Common Stock, par value $0.0001 per share, therefrom and to redesignate the Company's Series A Common Stock, par value $0.0001 per share, as "Common Stock." Following the filing of the Certificate of Amendment, the Company no longer has series of its class of 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 amount available to the Company to pay cash dividends is not currently restricted by its existing senior credit facility and its indentures governing its senior unsecured notes. Any decision to declare and pay dividends in the future will be made at the discretion of the Company's Board of Directors and will depend on, among other things, the results of operations, cash requirements, financial condition, contractual restrictions and other factors that the Company's Board of Directors may deem relevant. 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 2016 20 0.36 1.44 May 2016 April 2017 28 0.46 1.84 May 2017 April 2018 17 0.54 2.16 May 2018 On February 6, 2019 , the Company declared a quarterly cash dividend of $0.54 per share on its Common Stock amounting to $69 million . The cash dividend will be paid on March 1, 2019 to holders of record as of February 19, 2019 . 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 2018 2017 2016 Shares repurchased 7,933,692 (1) 5,436,803 7,034,420 47,712,711 Average purchase price per share $ 103.01 $ 91.97 $ 71.08 $ 66.08 Amount spent on repurchased shares (in millions) $ 817 $ 500 $ 500 $ 3,153 Aggregate Board of Directors repurchase authorizations during the period (in millions) (2) $ — $ 1,500 $ — $ 3,866 ______________________________ (1) Excludes 1,700 common shares reacquired pursuant to an employee clawback agreement. (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, 2018 2017 2016 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 (65 ) 5 (60 ) 162 12 174 (22 ) 11 (11 ) Gain (loss) on cash flow hedges (12 ) 2 (10 ) — (1 ) (1 ) 5 — 5 Pension and postretirement benefits 1 (1 ) — 7 2 9 (5 ) 1 (4 ) Total (76 ) 6 (70 ) 169 12 181 (22 ) 12 (10 ) 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, 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 ) Other comprehensive income (loss) before reclassifications — (65 ) (11 ) 1 (75 ) Amounts reclassified from accumulated other comprehensive income (loss) — — (1 ) — (1 ) Income tax (provision) benefit — 5 2 (1 ) 6 As of December 31, 2018 — (236 ) (8 ) (3 ) (247 )

Other (Charges) Gains, Net

Other (Charges) Gains, Net	12 Months Ended
	Dec. 31, 2018
Restructuring and Related Activities [Abstract]
Other (Charges) Gains, Net	Other (Charges) Gains, Net Year Ended December 31, 2018 2017 2016 (In $ millions) Restructuring ( Note 4 ) (4 ) (3 ) (8 ) InfraServ ownership change — (4 ) — Asset impairments — — (2 ) Plant/office closures 13 (52 ) — Commercial disputes — — 2 Total 9 (59 ) (8 ) 2018 During the year ended December 31, 2018 , the Company recorded a $13 million gain within plant/office closures related to a non-income tax receivable refund from Nanjing, China, in its Acetyl Chain segment. During the year ended December 31, 2018 , 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. 2017 During the year ended December 31, 2017 , the Company recorded $3 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 to purchase additional ownership interests in the InfraServ entities from the Company. The purchase of these interests reduced 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 ended December 31, 2017, the Company reduced the carrying value of these investments by $4 million . These InfraServ investments are primarily owned by entities included in the Other Activities segment. During the year ended December 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 $52 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 Chain segment. 2016 During the year ended December 31, 2016, the Company recorded $8 million of employee termination benefits primarily related to the Company's ongoing efforts to align its businesses around its core value drivers. The changes in the restructuring reserves by business segment are as follows: Engineered Materials Acetate Tow Acetyl Chain Other Total (In $ millions) Employee Termination Benefits As of December 31, 2016 2 8 3 3 16 Additions 1 2 — 1 4 Cash payments (2 ) (2 ) (2 ) (2 ) (8 ) Other changes — (8 ) — (1 ) (9 ) Exchange rate changes — — — — — As of December 31, 2017 1 — 1 1 3 Additions — 2 2 — 4 Cash payments (1 ) — (1 ) (1 ) (3 ) Other changes — — — — — Exchange rate changes — — — — — As of December 31, 2018 — 2 2 — 4 Other Plant/Office Closures 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 Additions — — — — — Cash payments — — (2 ) — (2 ) Other changes — — — — — Exchange rate changes — — — — — As of December 31, 2018 — — — — — Total — 2 2 — 4

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes On December 31, 2017, the Tax Cuts and Jobs Act (the "TCJA") was enacted and was effective January 1, 2018. In accordance with ASC 740, Accounting for Income Taxes , which 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 accumulated approximately $3.0 billion as of December 31, 2017, was taxed at 8% to the extent those earnings were reinvested in non-cash foreign assets, while previously unremitted earnings that had not been reinvested, computed based upon a two-year historical average of foreign cash and cash equivalents balances, was taxed at 15.5% . The Company recorded a net charge of $197 million for this deemed repatriation in 2017, for which it does not expect a material cash outlay due to available foreign tax credit carryforwards. 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 were effective for taxable years beginning after December 31, 2017 . The Company has elected to not record deferred taxes related to the future tax effects expected from the global minimum income tax. The US Treasury issued several proposed regulations supplementing the TCJA in 2018, including detailed guidance clarifying the calculation of the mandatory tax on previously unrepatriated earnings, application of the existing foreign tax credit rules to newly created categories and expanding details for application of the base erosion tax on affiliate payments. These proposed regulations are intended to be applied retroactively and would not materially impact the Company's 2018 tax rate if finalized in current form. The Company currently does not expect these regulations to have a material impact on income tax expense upon final adoption. The US Treasury's proposed 2018 regulations also seek to clarify the application of the TCJA provisions for the limitation of interest expense, including treatment of depreciation and other deductions in arriving at adjusted taxable income and application of the rules to controlled foreign affiliates. These regulations remain open for comment and are not effective until published in the federal register. As a result, the Company will monitor their impact to the Company's filing positions and will record the impacts as discrete income tax expense adjustments in the period that the guidance is finalized. Due to the timing and significance of the TCJA, the Staff of the Securities and Exchange Commission (the "SEC") issued Staff Accounting Bulletin No. 118 ("SAB 118"), which provided registrants a measurement period through 2018 to report the impact of the new US tax law. In 2017, the Company previously 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 offsetting foreign tax credit carryforwards. In 2018, the Company recorded additional income tax expense resulting from a decrease in SAB 118 provisional estimates of foreign tax credits (net of associated valuation allowances) of $66 million and an income tax benefit of $7 million that resulted from adjusting provisional estimates of the deferred tax rate change effects of the TCJA. The Company also recorded a decrease to the SAB 118 provisional estimates of deemed repatriation tax under the new law of $59 million , which was entirely offset by US foreign tax credit carryforwards. As of December 31, 2018, the Company has completed its accounting for the TCJA, including the proposed 2018 clarifying guidance. Income Tax Provision Earnings (loss) from continuing operations before tax by jurisdiction are as follows: Year Ended December 31, 2018 2017 2016 (In $ millions) US 480 262 326 International 1,030 813 704 Total 1,510 1,075 1,030 The income tax provision (benefit) consists of the following: Year Ended December 31, 2018 2017 2016 (In $ millions) Current US (184 ) 201 (22 ) International 143 158 60 Total (41 ) 359 38 Deferred US 314 (110 ) 108 International 19 (36 ) (24 ) Total 333 (146 ) 84 Total 292 213 122 A reconciliation of the significant differences between the US federal statutory tax rate of 21% ( 35% for 2017 and 2016) and the effective income tax rate on income from continuing operations is as follows: Year Ended December 31, 2018 2017 2016 (In $ millions, except percentages) Income tax provision computed at US federal statutory tax rate 317 376 361 Change in valuation allowance 94 218 (18 ) Equity income and dividends (48 ) (87 ) (60 ) (Income) expense not resulting in tax impact, net (51 ) (157 ) (152 ) US tax effect of foreign earnings and dividends 25 521 302 Foreign tax credits (20 ) (759 ) (293 ) Other foreign tax rate differentials 17 (38 ) (48 ) Legislative changes (59 ) 116 4 State income taxes, net of federal benefit 4 12 8 Other, net 13 11 18 Income tax provision (benefit) 292 213 122 Effective income tax rate 19 % 20 % 12 % 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 offshore cash balances. The Company has not recorded a deferred tax liability for foreign withholding or other foreign local tax that would be due when cash is actually repatriated to the US because those 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 effective tax rate for the year ended December 31, 2018 was comparable to the effective tax rate for the year ended December 31, 2017 . The effective tax rate for 2018 was slightly less than the statutory US tax rate primarily due to the positive impact from jurisdictional mix of earnings, largely offset by increased valuation allowances established on certain deferred tax assets, particularly related to increases in provisionally recorded estimates of valuation allowances on foreign tax credits in the US and net operating loss carryforwards in Luxembourg, due to certain restructuring transactions completed to facilitate future repatriation of cash to the US. The higher effective tax rate for the year ended December 31, 2017, compared to the effective tax rate for the year ended December 31, 2016, was primarily due to the impact of the TCJA (reflected in the Change in valuation allowance and Legislative changes lines, above), increased losses in jurisdictions with no tax benefit and current year taxes related to the restructuring of the Company's Acetate Tow segment (reflected 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 related to $52 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 was recorded in the Change in valuation allowance line above. During 2017, the Company undertook various reorganization transactions to separate certain Acetate Tow assets to reorganize the holdings of its various foreign subsidiaries. As a result, the Company generated additional net foreign tax credit carryforwards of approximately $240 million , the gross impacts of which were reflected in the Foreign tax credits line and the US tax effect of foreign earnings lines above, that will be carried forward to future tax periods. These new credit carryforwards, as well as other credits carried forward 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 was reflected in the Change in valuation allowance line in the effective tax rate reconciliation above. The lower effective tax rate for the year ended December 31, 2016 was primarily due to the settlement of uncertain tax positions and technical clarifications in Germany and the US of $55 million , reflected in the Other, net line above. 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, 2018 2017 (In $ millions) Deferred Tax Assets Pension and postretirement obligations 138 143 Accrued expenses 61 50 Inventory 13 10 Net operating loss carryforwards 616 703 Tax credit carryforwards (1) 330 478 Other 195 192 Subtotal 1,353 1,576 Valuation allowance (2) (899 ) (618 ) Total 454 958 Deferred Tax Liabilities Depreciation and amortization 375 307 Investments in affiliates 203 427 Other 47 69 Total 625 803 Net deferred tax assets (liabilities) (171 ) 155 ______________________________ (1) For the year ended December 31, 2018 , the tax credit carryforwards decreased primarily due to the consumption of US foreign tax credits resulting from the deemed repatriation tax required by the TCJA. (2) Includes deferred tax asset valuation allowances for the Company's deferred tax assets in the US, Luxembourg, Spain, China, 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. Tax Carryforwards • Net Operating Loss Carryforwards As of December 31, 2018 , the Company had available US federal net operating loss carryforwards of $33 million that are subject to limitation. These net operating loss carryforwards begin to expire in 2021 . As of December 31, 2018 , the Company also had available state net operating loss carryforwards, net of federal tax impact, of $73 million , $65 million of which are offset by a valuation allowance due to uncertain recoverability. The Company also has foreign net operating loss carryforwards available as of December 31, 2018 of $2.1 billion primarily for Luxembourg, China and Spain, with various expiration dates. Net operating loss carryforwards of $450 million in China are scheduled to expire beginning in 2019 through 2021 . Net operating losses in most other foreign jurisdictions do not have an expiration date. • Tax Credit Carryforwards The Company had available $301 million of foreign tax credit carryforwards, which are mostly offset by a valuation allowance of $277 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 expire beginning in 2027 . The alternative minimum tax credits are subject to annual limitation due to prior ownership changes, but have an unlimited carryforward period and can be used to offset federal tax liability in future years. The Company evaluates its deferred tax assets on a quarterly basis to determine whether a valuation allowance is necessary. Realization of deferred tax assets ultimately depends on the existence of sufficient taxable income in the applicable carryback or carryforward periods. Changes in the Company's estimates of future taxable income and prudent and feasible tax planning strategies will affect the estimate of the realization of the tax benefits of these foreign tax carryforwards. As such, the Company is currently evaluating tax planning strategies to enable use of the foreign tax credit carryforwards that may decrease the Company's effective tax rate in future periods as the valuation allowance is reversed. Uncertain Tax Positions Activity related to uncertain tax positions is as follows: Year Ended December 31, 2018 2017 2016 (In $ millions) As of the beginning of the year 119 114 158 Increases in tax positions for the current year 61 14 9 Increases in tax positions for prior years (1) 4 4 11 Decreases in tax positions for prior years (21 ) (7 ) (9 ) Decreases due to settlements (1 ) (6 ) (55 ) As of the end of the year 162 119 114 Total uncertain tax positions that if recognized would impact the effective tax rate 154 100 87 Total amount of interest expense (benefit) and penalties recognized in the consolidated statements of operations (2) 1 6 (16 ) Total amount of interest expense and penalties recognized in the consolidated balance sheets 38 38 26 ______________________________ (1) Includes uncertain tax positions related to the Nilit acquisition ( Note 4 ) of $4 million for the year ended December 31, 2018 . (2) This amount reflects interest on uncertain tax positions and release of certain tax positions as a result of an audit closure that was reflected in the consolidated statements of operations. 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 increase in uncertain tax positions for the year ended December 31, 2018 was primarily due to progress of tax examinations. 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 . The Company has entered the appeals process for the 2009 and 2010 exam cycle. 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 foreign tax credit carryforwards. The Company believes these proposed adjustments to be without merit and is vigorously defending its position.

Management Compensation Plans

Management Compensation Plans	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Management Compensation Plans	Management Compensation Plans General Plan Description On April 19, 2018, the stockholders of the Company approved the 2018 GIP, effective April 23, 2018 (the "Effective Date"). Upon the Effective Date, no additional awards will be made under the 2009 Global Incentive Plan, as amended (the "2009 GIP"). The total number of shares of Common Stock for which awards may be granted under the 2018 GIP shall be (i) 2,500,000 new shares of Common Stock plus (ii) the number of shares of Common Stock available for future awards under the 2009 GIP as of the Effective Date, and (iii) the number of shares of Common Stock that are subject to outstanding equity awards under the 2009 GIP as of the Effective Date but may again become available for grants of awards under the 2018 GIP if an outstanding award under the 2009 GIP terminates by expiration, forfeiture, cancellation or otherwise without the issuance of such shares for awards not involving shares of Common Stock as provided in the 2018 GIP. The 2018 GIP enables the compensation committee of the Board of Directors (and the Board of Directors as to non-management 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, 2018 Shares Available for Awards Shares Subject to Outstanding Awards 2018 GIP 7,256,282 50,003 2009 GIP — 1,995,089 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, 2017 860 64.71 Granted 227 94.54 Vested (73 ) 53.23 Canceled (140 ) 53.24 Forfeited (62 ) 75.43 As of December 31, 2018 812 75.25 The fair value of shares vested for performance-based RSUs is as follows: Year Ended December 31, 2018 2017 2016 (In $ millions) Total 8 42 64 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, 2017 351 75.75 Granted 283 93.62 Vested (201 ) 78.56 Forfeited (47 ) 81.44 As of December 31, 2018 386 86.69 The fair value of shares vested for time-based RSUs is as follows: Year Ended December 31, 2018 2017 2016 (In $ millions) Total 21 12 4 The weighted average grant date fair value of RSUs granted is as follows: Year Ended December 31, 2018 2017 2016 (In $ millions) Total 48 59 75 As of December 31, 2018 , there was $62 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. The Company realized income tax benefits from RSU vestings as follows: Year Ended December 31, 2018 2017 2016 (In $ millions) Income tax benefit realized 7 9 7

Leases

Leases	12 Months Ended
	Dec. 31, 2018
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, 2018 Capital Leases (In $ millions) 2019 42 2020 42 2021 40 2022 32 2023 23 Later years 88 Sublease income — Minimum lease commitments 267 Less amounts representing interest (100 ) Present value of net minimum lease obligations 167 As of December 31, 2018 Operating Leases (In $ millions) 2019 43 2020 34 2021 25 2022 23 2023 21 Later years 130 Sublease income — Minimum lease commitments 276 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, 2018 2017 2016 (In $ millions) Total 96 91 77

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments Derivatives Designated As Hedges Cash Flow Hedges The total notional amount of the forward-starting interest rate swap designated as a cash flow hedge is as follows: As of December 31, 2018 2017 (In $ millions) Total 400 — 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, 2018 2017 (In € millions) Total 1,550 1,050 Derivatives Not Designated As Hedges 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: 2019 Maturity (In $ millions) Currency Brazilian real (14 ) British pound sterling (84 ) Canadian dollar 33 Chinese yuan (74 ) Euro 106 Hungarian forint 11 Indonesian rupiah (13 ) Japanese yen (2 ) Korean won 15 Mexican peso (68 ) Singapore dollar 41 Swedish krona (6 ) Total (55 ) Gross notional values of the foreign currency forwards and swaps are as follows: As of December 31, 2018 2017 (In $ millions) Total 1,071 740 Hedging activity for foreign currency forwards and commodity swaps is as follows: Year Ended December 31, Statement of Operations Classification 2018 2017 2016 (In $ millions) Hedging activities 1 4 2 Cost of sales; Interest expense 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, 2018 2017 2016 2018 2017 2016 (In $ millions) Designated as Cash Flow Hedges Commodity swaps (2 ) 4 7 1 5 2 Cost of sales Interest rate swaps (10 ) — — — — — Interest expense Foreign currency forwards 1 (1 ) — — (1 ) — Cost of sales Total (11 ) 3 7 1 4 2 Designated as Net Investment Hedges Foreign currency denominated debt ( Note 14 ) 51 (119 ) 61 — — — N/A Foreign currency forwards — 2 — — — — N/A Total 51 (117 ) 61 — — — Not Designated as Hedges Foreign currency forwards and swaps — — — 13 2 14 Foreign exchange gain (loss), net; Other income (expense), net Total — — — 13 2 14 See Note 23 for additional information regarding the fair value of the Company's derivative instruments. Certain of the Company's commodity swaps, interest rate 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, 2018 2017 (In $ millions) Derivative Assets Gross amount recognized 11 13 Gross amount offset in the consolidated balance sheets 2 4 Net amount presented in the consolidated balance sheets 9 9 Gross amount not offset in the consolidated balance sheets 3 3 Net amount 6 6 As of December 31, 2018 2017 (In $ millions) Derivative Liabilities Gross amount recognized 20 7 Gross amount offset in the consolidated balance sheets 2 4 Net amount presented in the consolidated balance sheets 18 3 Gross amount not offset in the consolidated balance sheets 3 3 Net amount 15 —

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2018
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 interest rate swaps, 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, interest rate 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, 2018 2017 2018 2017 2018 2017 (In $ millions) Derivatives Designated as Cash Flow Hedges Commodity swaps — — 1 2 1 2 Current Other assets Commodity swaps — — — 2 — 2 Noncurrent Other assets Derivatives Not Designated as Hedges Foreign currency forwards and swaps — — 8 5 8 5 Current Other assets Total assets — — 9 9 9 9 Derivatives Designated as Cash Flow Hedges Commodity swaps — — (1 ) — (1 ) — Noncurrent Other liabilities Interest rate swaps — — (10 ) — (10 ) — Noncurrent Other liabilities Derivatives Not Designated as Hedges Foreign currency forwards and swaps — — (7 ) (3 ) (7 ) (3 ) Current Other liabilities Total liabilities — — (18 ) (3 ) (18 ) (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, 2018 2017 2018 2017 2018 2017 2018 2017 (In $ millions) Equity investments without readily determinable fair values 164 159 — — — — — — Insurance contracts in nonqualified trusts 37 42 37 42 — — 37 42 Long-term debt, including current installments of long-term debt 3,355 3,398 3,204 3,299 168 208 3,372 3,507 In general, the equity 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, 2018 and 2017 , 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.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
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, 2018 are $89 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 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 $116 million as of December 31, 2018 . 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 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, 2018 , the Company had unconditional purchase obligations of $1.4 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 Investigation 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.

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	12 Months Ended
	Dec. 31, 2018
Supplemental Cash Flow Information [Abstract]
Supplemental Cash Flow Information	Supplemental Cash Flow Information Year Ended December 31, 2018 2017 2016 (In $ millions) Interest paid, net of amounts capitalized 133 130 130 Taxes paid, net of refunds 100 123 129 Noncash Investing and Financing Activities Accrued treasury stock repurchases 13 — — Accrued capital expenditures (4 ) 14 1 Asset retirement obligations (7 ) 2 2 Fair value adjustment to securities available for sale, net of tax — (1 ) —

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Segment Information	Segment Information Business Segments Effective January 1, 2018, the Company reorganized its operating and reportable segments to align with recent structural and management reporting changes. The changes reflect the movement of its food ingredients business from the Consumer Specialties reportable segment into the Engineered Materials reportable segment. In addition, the former Consumer Specialties reportable segment was renamed the Acetate Tow segment, and the former Advanced Engineered Materials reportable segment was renamed the Engineered Materials segment. This reorganization better reflects how the Company manages its food ingredients' related products commercially. Engineered Materials and food ingredients are both project-based models that focus on delivering customized solutions and are led by the same senior management team. Effective December 31, 2018, the Company further reorganized its operating and reportable segments to align with recent structural and management reporting changes. The change reflects the resegmentation of the former Industrial Specialties and former Acetyl Intermediates operating and reportable segments, to the Acetyl Chain operating and reportable segment. This reorganization reflects the culmination of a shift in operating strategy and organizational hierarchy, with a focus on integration, collaboration and maximization of value creation through its global optionality and integrated chain model of the underlying businesses along the Acetyl Chain segment. 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: • Engineered Materials The Company's Engineered Materials segment includes the engineered materials business, our food ingredients 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 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. It is also 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. • Acetate Tow The Company's Acetate Tow segment serves consumer-driven applications and is a leading global producer and supplier of acetate tow and acetate flake, primarily used in filter products applications. • Acetyl Chain The Company's Acetyl Chain segment includes the integrated chain of intermediate chemistry, emulsion polymers and ethylene vinyl acetate ("EVA") polymers businesses, 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 intermediate chemistry business 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. It also produces organic solvents and intermediates for pharmaceutical, agricultural and chemical products. 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 EVA 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. • 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. Engineered Materials Acetate Tow Acetyl Chain Other Activities Eliminations Consolidated (In $ millions) Year Ended December 31, 2018 Net sales 2,593 649 (1) 4,042 (2) — (129 ) 7,155 Other (charges) gains, net ( Note 18 ) — (2 ) 11 — — 9 Operating profit (loss) 460 130 1,024 (280 ) — 1,334 Equity in net earnings (loss) of affiliates 218 — 6 9 — 233 Depreciation and amortization 126 58 148 11 — 343 Capital expenditures 105 29 182 17 — 333 (3) As of December 31, 2018 Goodwill and intangible assets, net 974 153 240 — — 1,367 Total assets 4,012 1,032 3,471 798 — 9,313 Year Ended December 31, 2017 - As Adjusted ( Note 3 ) Net sales 2,213 668 (1) 3,371 (2) — (112 ) 6,140 Other (charges) gains, net ( Note 18 ) (2 ) (2 ) (52 ) (3 ) — (59 ) Operating profit (loss) 412 189 509 (253 ) — 857 Equity in net earnings (loss) of affiliates 171 — 6 6 — 183 Depreciation and amortization 111 41 143 10 — 305 Capital expenditures 78 39 150 14 — 281 (3) As of December 31, 2017 Goodwill and intangible assets, net 902 154 248 — — 1,304 Total assets 3,866 1,163 3,518 991 — 9,538 Year Ended December 31, 2016 - As Adjusted ( Note 3 ) Net sales 1,552 821 (1) 3,132 (2) — (116 ) 5,389 Other (charges) gains, net ( Note 18 ) (2 ) (1 ) (5 ) — — (8 ) Operating profit (loss) 377 276 443 (163 ) 1 934 Equity in net earnings (loss) of affiliates 125 — 6 24 — 155 Depreciation and amortization 95 42 141 12 — 290 Capital expenditures 75 36 124 12 — 247 (3) ______________________________ (1) Includes intersegment sales of $0 million , $2 million , and $0 million for the years ended December 31, 2018 , 2017 and 2016 , respectively. (2) Includes intersegment sales of $129 million , $110 million and $116 million for the years ended December 31, 2018 , 2017 and 2016 , respectively. (3) Includes a decrease in accrued capital expenditures of $4 million for the year ended December 31, 2018 and an increase in accrued capital expenditures of $14 million and $1 million for the years ended December 31, 2017 and 2016 , respectively. Geographical Area Information The net sales to external customers based on geographic location are as follows: Year Ended December 31, 2018 2017 2016 (In $ millions) Belgium 261 295 408 Canada 115 92 123 China 1,070 833 745 Germany 2,335 1,776 1,540 Mexico 307 257 214 Singapore 997 867 758 US 1,769 1,572 1,451 Other 301 448 150 Total 7,155 6,140 5,389 Property, plant and equipment, net based on the geographic location of the Company's facilities is as follows: As of December 31, 2018 2017 (In $ millions) Belgium 54 57 Canada 114 128 China 331 363 Germany 903 979 Mexico 144 162 Singapore 83 87 US 1,961 1,857 Other 129 129 Total 3,719 3,762

Revenue (Notes)

Revenue (Notes)	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue	Revenue Disaggregated Revenue In general, the Company's business segmentation is aligned according to the nature and economic characteristics of its products and customer relationships and provides meaningful disaggregation of each business segment's results of operations. The Company manages its Engineered Materials business segment through its project management pipeline, which is comprised of a broad range of projects which are solutions-based and are tailored to each customers' unique needs. Projects are identified and selected based on success rate and may involve a number of different polymers per project for use in multiple end-use applications. Therefore, the Company is agnostic toward products and end-use markets for the Engineered Materials business segment. Within the Acetate Tow business segment, the Company's primary product is acetate tow, which is managed through contracts with a few major tobacco companies and accounts for a significant amount of filters used in cigarette production worldwide. The Company manages its Acetyl Chain business segment by leveraging its ability to sell chemicals externally to end-use markets or downstream to its emulsion polymers business. Decisions to sell externally and geographically or downstream and along the Acetyl Chain are based on market demand, trade flows and maximizing the value of its chemicals. Therefore, the Company's strategic focus is on executing within this integrated chain model and less on driving product-specific revenue. Further disaggregation of Net sales by business segment and geographic destination is as follows: Year Ended December 31, 2018 (In $ millions) Engineered Materials North America 770 Europe and Africa 1,216 Asia-Pacific 532 South America 75 Total 2,593 Acetate Tow North America 133 Europe and Africa 260 Asia-Pacific 217 South America 39 Total 649 Acetyl Chain North America 1,145 Europe and Africa 1,236 Asia-Pacific 1,411 South America 121 Total (1) 3,913 ______________________________ (1) Excludes intersegment sales of $129 million for the year ended December 31, 2018 .

Earnings (Loss) Per Share

Earnings (Loss) Per Share	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Earnings (Loss) Per Share	Earnings (Loss) Per Share Year Ended December 31, 2018 2017 2016 (In $ millions, except share data) Amounts attributable to Celanese Corporation Earnings (loss) from continuing operations 1,212 856 902 Earnings (loss) from discontinued operations (5 ) (13 ) (2 ) Net earnings (loss) 1,207 843 900 Weighted average shares - basic 134,305,269 137,902,667 144,939,433 Incremental shares attributable to equity awards (1) 1,111,589 414,728 728,748 Weighted average shares - diluted 135,416,858 138,317,395 145,668,181 ______________________________ (1) Excludes 0 , 29 and 836 equity award shares for the years ended December 31, 2018 , 2017 and 2016 , respectively, as their effect would have been antidilutive.

Consolidating Guarantor Financi

Consolidating Guarantor Financial Information	12 Months Ended
	Dec. 31, 2018
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. 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, 2018 Parent Guarantor Issuer Subsidiary Guarantors Non- Guarantors Eliminations Consolidated (In $ millions) Net sales — — 2,387 5,954 (1,186 ) 7,155 Cost of sales — — (1,898 ) (4,471 ) 1,186 (5,183 ) Gross profit — — 489 1,483 — 1,972 Selling, general and administrative expenses — — (213 ) (333 ) — (546 ) Amortization of intangible assets — — (8 ) (16 ) — (24 ) Research and development expenses — — (30 ) (42 ) — (72 ) Other (charges) gains, net — — — 9 — 9 Foreign exchange gain (loss), net — (3 ) — 3 — — Gain (loss) on disposition of businesses and assets, net — — (10 ) 5 — (5 ) Operating profit (loss) — (3 ) 228 1,109 — 1,334 Equity in net earnings (loss) of affiliates 1,207 1,202 1,033 220 (3,429 ) 233 Non-operating pension and other postretirement employee benefit (expense) income — — (28 ) (34 ) — (62 ) Interest expense — (30 ) (118 ) (33 ) 56 (125 ) Refinancing expense — (1 ) — — — (1 ) Interest income — 45 7 10 (56 ) 6 Dividend income - equity investments — — — 113 4 117 Other income (expense), net — 5 1 3 (1 ) 8 Earnings (loss) from continuing operations before tax 1,207 1,218 1,123 1,388 (3,426 ) 1,510 Income tax (provision) benefit — (11 ) (106 ) (176 ) 1 (292 ) Earnings (loss) from continuing operations 1,207 1,207 1,017 1,212 (3,425 ) 1,218 Earnings (loss) from operation of discontinued operations — — 3 (8 ) — (5 ) Gain (loss) on disposition of discontinued operations — — — — — — Income tax (provision) benefit from discontinued operations — — (1 ) 1 — — Earnings (loss) from discontinued operations — — 2 (7 ) — (5 ) Net earnings (loss) 1,207 1,207 1,019 1,205 (3,425 ) 1,213 Net (earnings) loss attributable to noncontrolling interests — — — (6 ) — (6 ) Net earnings (loss) attributable to Celanese Corporation 1,207 1,207 1,019 1,199 (3,425 ) 1,207 CELANESE CORPORATION AND SUBSIDIARIES CONSOLIDATING STATEMENT OF OPERATIONS Year Ended December 31, 2017 - As Adjusted ( Note 3 ) Parent Guarantor Issuer Subsidiary Guarantors Non- Guarantors Eliminations Consolidated (In $ millions) Net sales — — 2,240 5,013 (1,113 ) 6,140 Cost of sales — — (1,723 ) (4,014 ) 1,108 (4,629 ) Gross profit — — 517 999 (5 ) 1,511 Selling, general and administrative expenses — — (189 ) (307 ) — (496 ) Amortization of intangible assets — — (4 ) (16 ) — (20 ) Research and development expenses — — (32 ) (41 ) — (73 ) Other (charges) gains, net — — (6 ) (53 ) — (59 ) Foreign exchange gain (loss), net — — — (1 ) — (1 ) Gain (loss) on disposition of businesses and assets, net — — (8 ) 3 — (5 ) Operating profit (loss) — — 278 584 (5 ) 857 Equity in net earnings (loss) of affiliates 843 867 591 166 (2,284 ) 183 Non-operating pension and other postretirement employee benefit (expense) income — — 60 (16 ) — 44 Interest expense — (20 ) (104 ) (30 ) 32 (122 ) Refinancing expense — — — — — — Interest income — 25 4 5 (32 ) 2 Dividend income - equity 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 - As Adjusted ( Note 3 ) Parent Guarantor Issuer Subsidiary Guarantors Non- Guarantors Eliminations Consolidated (In $ millions) Net sales — — 2,162 4,322 (1,095 ) 5,389 Cost of sales — — (1,658 ) (3,427 ) 1,101 (3,984 ) Gross profit — — 504 895 6 1,405 Selling, general and administrative expenses — — (113 ) (265 ) — (378 ) Amortization of intangible assets — — (5 ) (4 ) — (9 ) Research and development expenses — — (32 ) (46 ) — (78 ) Other (charges) gains, net — — — (8 ) — (8 ) Foreign exchange gain (loss), net — — — (1 ) — (1 ) Gain (loss) on disposition of businesses and assets, net — — (8 ) 17 (6 ) 3 Operating profit (loss) — — 346 588 — 934 Equity in net earnings (loss) of affiliates 898 939 653 146 (2,481 ) 155 Non-operating pension and other postretirement employee benefit (expense) income — — 2 (43 ) — (41 ) Interest expense — (16 ) (94 ) (29 ) 19 (120 ) Refinancing expense — (4 ) (2 ) — — (6 ) Interest income — 12 4 5 (19 ) 2 Dividend income - equity 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 COMPREHENSIVE INCOME (LOSS) Year Ended December 31, 2018 Parent Guarantor Issuer Subsidiary Guarantors Non- Guarantors Eliminations Consolidated (In $ millions) Net earnings (loss) 1,207 1,207 1,019 1,205 (3,425 ) 1,213 Other comprehensive income (loss), net of tax Unrealized gain (loss) on marketable securities — — 6 13 (19 ) — Foreign currency translation (60 ) (60 ) (90 ) (109 ) 259 (60 ) Gain (loss) from cash flow hedges (10 ) (10 ) (2 ) (1 ) 13 (10 ) Pension and postretirement benefits — — — — — — Total other comprehensive income (loss), net of tax (70 ) (70 ) (86 ) (97 ) 253 (70 ) Total comprehensive income (loss), net of tax 1,137 1,137 933 1,108 (3,172 ) 1,143 Comprehensive (income) loss attributable to noncontrolling interests — — — (6 ) — (6 ) Comprehensive income (loss) attributable to Celanese Corporation 1,137 1,137 933 1,102 (3,172 ) 1,137 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 BALANCE SHEET As of December 31, 2018 Parent Guarantor Issuer Subsidiary Guarantors Non- Guarantors Eliminations Consolidated (In $ millions) ASSETS Current Assets Cash and cash equivalents — — 30 409 — 439 Trade receivables - third party and affiliates — — 96 1,040 (119 ) 1,017 Non-trade receivables, net 40 551 797 697 (1,784 ) 301 Inventories, net — — 329 765 (48 ) 1,046 Marketable securities, at fair value — — 31 — — 31 Other assets — 24 10 37 (31 ) 40 Total current assets 40 575 1,293 2,948 (1,982 ) 2,874 Investments in affiliates 3,503 4,820 4,678 855 (12,877 ) 979 Property, plant and equipment, net — — 1,289 2,430 — 3,719 Deferred income taxes — — — 86 (2 ) 84 Other assets — 1,658 142 461 (1,971 ) 290 Goodwill — — 399 658 — 1,057 Intangible assets, net — — 132 178 — 310 Total assets 3,543 7,053 7,933 7,616 (16,832 ) 9,313 LIABILITIES AND EQUITY Current Liabilities Short-term borrowings and current installments of long-term debt - third party and affiliates 544 333 465 258 (1,039 ) 561 Trade payables - third party and affiliates 13 1 342 583 (120 ) 819 Other liabilities 1 87 267 258 (270 ) 343 Income taxes payable — — 475 88 (507 ) 56 Total current liabilities 558 421 1,549 1,187 (1,936 ) 1,779 Noncurrent Liabilities Long-term debt, net of unamortized deferred financing costs — 3,104 1,679 127 (1,940 ) 2,970 Deferred income taxes — 15 85 157 (2 ) 255 Uncertain tax positions — — 6 152 — 158 Benefit obligations — — 250 314 — 564 Other liabilities 1 10 99 138 (40 ) 208 Total noncurrent liabilities 1 3,129 2,119 888 (1,982 ) 4,155 Total Celanese Corporation stockholders' equity 2,984 3,503 4,265 5,146 (12,914 ) 2,984 Noncontrolling interests — — — 395 — 395 Total equity 2,984 3,503 4,265 5,541 (12,914 ) 3,379 Total liabilities and equity 3,543 7,053 7,933 7,616 (16,832 ) 9,313 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 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 STATEMENT OF CASH FLOWS Year Ended December 31, 2018 Parent Guarantor Issuer Subsidiary Guarantors Non- Guarantors Eliminations Consolidated (In $ millions) Net cash provided by (used in) operating activities 1,085 560 259 833 (1,179 ) 1,558 Investing Activities Capital expenditures on property, plant and equipment — — (225 ) (112 ) — (337 ) Acquisitions, net of cash acquired — — (144 ) — — (144 ) Proceeds from sale of businesses and assets, net — — — 13 — 13 Return of capital from subsidiary — — 233 — (233 ) — Contributions to subsidiary — — (25 ) — 25 — Intercompany loan receipts (disbursements) — (427 ) (66 ) (285 ) 778 — Other, net — — (8 ) (31 ) — (39 ) Net cash provided by (used in) investing activities — (427 ) (235 ) (415 ) 570 (507 ) Financing Activities Short-term borrowings (repayments), net — 61 18 (51 ) (66 ) (38 ) Proceeds from short-term borrowings — — — 51 — 51 Repayments of short-term borrowings — — — (78 ) — (78 ) Proceeds from long-term debt — 846 427 — (712 ) 561 Repayments of long-term debt — (494 ) (26 ) (16 ) — (536 ) Purchases of treasury stock, including related fees (805 ) — — — — (805 ) Dividends to parent — (541 ) (633 ) (5 ) 1,179 — Contributions from parent — — — 25 (25 ) — Stock option exercises — — — — — — Common stock dividends (280 ) — — — — (280 ) Return of capital to parent — — — (233 ) 233 — (Distributions to) contributions from noncontrolling interests — — — (23 ) — (23 ) Other, net — (5 ) (10 ) (2 ) — (17 ) Net cash provided by (used in) financing activities (1,085 ) (133 ) (224 ) (332 ) 609 (1,165 ) Exchange rate effects on cash and cash equivalents — — — (23 ) — (23 ) Net increase (decrease) in cash and cash equivalents — — (200 ) 63 — (137 ) Cash and cash equivalents as of beginning of period — — 230 346 — 576 Cash and cash equivalents as of end of period — — 30 409 — 439 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 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 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 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 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

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On January 7, 2019, Celanese, Celanese US and certain subsidiary borrowers entered into a new credit agreement with a group of lenders. The new agreement is substantially the same as the prior Credit Agreement, except that the facility was increased to $1.25 billion and the maturity date was extended to January 2024. On January 2, 2019, using cash on hand, the Company completed the acquisition of 100% of the ownership interests of Next Polymers Ltd., an India-based engineering thermoplastics ("ETP") compounder. The acquisition strengthens the Company's position in the Indian ETP market and further expands the Company's global manufacturing footprint. The acquisition will be accounted for as a business combination, and the acquired operations will be included in the Engineered Materials segment beginning in the first quarter of 2019. 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 2019 financial position or results of operations.

Summary of Accounting Policies

Summary of Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
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	Legal Proceedings 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 in equity securities 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 in equity securities where the Company does not exercise significant influence are accounted for at fair value or, if such investments do not have a readily determinable fair value, an election may be made to measure them at cost after considering observable price changes for similar instruments, minus impairment, if any. 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. Further, these investments were determined not to have a readily determinable fair value. Accordingly, these investments are accounted for using the alternative measure described above. 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. • Interest Rate Risk Management The Company entered into a forward-starting interest rate swap to mitigate the risk of variability in the benchmark interest rate for an expected debt issuance in 2021. The interest rate swap agreement is designated as a cash flow hedge. Accordingly, to the extent the cash flow hedge is effective, changes in the fair value of the interest rate swap are included in gain (loss) from cash flow hedges within Accumulated other comprehensive income (loss), net in the consolidated balance sheets. Hedge accounting is discontinued when the interest rate swap is no longer effective in offsetting cash flows attributable to the hedged risk, the interest rate swap expires or the cash flow hedge is dedesignated because it is no longer probable that the forecasted transaction will occur according to the original strategy. • 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 Revenue is recognized when performance obligations under the terms of a contract with a customer are satisfied. The majority of the Company's contracts have a single performance obligation to transfer products. Accordingly, the Company recognizes revenue when title and risk of loss have been transferred to the customer, generally at the time of shipment of products. Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring products and is generally based upon a negotiated, formula, list or fixed price. The Company sells its products both directly to customers and through distributors generally under agreements with payment terms typically less than 90 days.
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 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 generally cliff-vest three years from the date of grant. Compensation expense for performance-based RSUs 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. 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 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 2018 Global Incentive Plan ("2018 GIP"), the Company may not grant RSUs with the right to participate in dividends or dividend equivalents prior to vesting.
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.
Shipping and Handling Cost, Policy [Policy Text Block]	The Company has elected to account for shipping and handling as activities to fulfill the promise to transfer the good. As such, 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.
Revenue, Transaction Price Measurement, Tax Exclusion [Policy Text Block]	The Company has elected to exclude from Net sales any value add, sales and other taxes which it collects concurrent with revenue-producing activities.

Summary of Accounting Policie_2

Summary of Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
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.

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements (Tables)	12 Months Ended
	Dec. 31, 2018
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles	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 2018, the FASB issued ASU 2018-14, Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans. The new guidance modifies the disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans by removing disclosures that no longer are considered cost beneficial, clarifying the specific requirements of disclosures and adding disclosure requirements identified as relevant. January 1, 2020. Early adoption is permitted. The Company is currently evaluating the impact of adoption on its financial statement disclosures. In February 2018, the FASB issued ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The new guidance allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act and will improve the usefulness of information reported to financial statement users. January 1, 2019. Early adoption is permitted. The Company has completed its assessment and will adopt the new guidance effective January 1, 2019. The adoption of the new guidance will not have a material impact to the Company. 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 adopted the new guidance effective January 1, 2018, as part of the FASB's simplification initiative. The adoption of the new guidance did not have a material impact to the Company. 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. The Company adopted the new guidance effective January 1, 2018, using the retrospective transition method, as part of the FASB's simplification initiative. See Adoption of ASU 2017-07 section below for additional information. 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. The Company adopted the new guidance effective January 1, 2018, as part of the FASB's simplification initiative. The adoption of the new guidance did not have a material impact to the Company. 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. The Company adopted the new guidance effective January 1, 2018, as part of the FASB's simplification initiative. The adoption of the new guidance did not have a material impact to the Company. In February 2016, the FASB issued ASU 2016-02, Leases. Since that date, the FASB has issued additional ASUs clarifying certain aspects of ASU 2016-02. 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. Subsequent guidance issued after February 2016 did not change the core principle of ASU 2016-02. January 1, 2019. Early adoption is permitted. The Company has substantially completed evaluating its population of leases, and the most significant impact relates to its accounting for manufacturing and logistics equipment, and real estate operating leases. The Company currently anticipates recognition of additional assets and corresponding liabilities related to leases of approximately $225 million upon adoption. The Company plans to adopt the standard effective January 1, 2019, utilizing the modified retrospective transition method. Standard Description Effective Date Effect on the Financial Statements or Other Significant Matters 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. The Company adopted the new guidance effective January 1, 2018, using the modified retrospective approach, as part of the FASB's simplification initiative. The new guidance resulted in a cumulative-effect adjustment of less than $1 million to January 1, 2018 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. The Company adopted the new guidance effective January 1, 2018, using the modified retrospective approach, as part of the FASB's simplification initiative. The adoption of the new guidance resulted in less than $1 million impact to the consolidated financial statements and related disclosures (See Note 27 ).
Schedule of Error Corrections and Prior Period Adjustments	Year Ended December 31, 2017 As previously reported Adoption of ASU 2017-07 As Adjusted (In $ millions) Cost of sales (4,625 ) (4 ) (4,629 ) Selling, general and administrative expenses (456 ) (40 ) (496 ) Research and development expenses (72 ) (1 ) (73 ) Other (charges) gains, net (60 ) 1 (59 ) Operating profit (loss) 901 (44 ) 857 Non-operating pension and other postretirement employee benefit (expense) income — 44 44 Year Ended December 31, 2016 As previously reported Adoption of ASU 2017-07 As Adjusted (In $ millions) Selling, general and administrative expenses (416 ) 38 (378 ) Other (charges) gains, net (11 ) 3 (8 ) Operating profit (loss) 893 41 934 Non-operating pension and other postretirement employee benefit (expense) income — (41 ) (41 )

Acquisitions, Dispositions an_2

Acquisitions, Dispositions and Plant Closures (Tables)	12 Months Ended
	Dec. 31, 2018
Acquisitions, Dispositions and Plant Closures [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The preliminary purchase price allocation for the Omni Plastics acquisition is as follows: As of (In $ millions) Cash and cash equivalents 2 Trade receivables - third party and affiliates 12 Inventories 13 Property, plant and equipment, net 19 Intangible assets ( Note 11 ) 35 Goodwill ( Note 11 ) (1) 84 Other assets 1 Total fair value of assets acquired 166 Trade payables - third party and affiliates (8 ) Total debt ( Note 14 ) (12 ) Total fair value of liabilities assumed (20 ) Net assets acquired 146 ______________________________ (1) Goodwill consists of expected revenue and operating synergies resulting from the acquisition, all of which is deductible for income tax purposes.
Schedule of Restructuring and Related Costs	The exit and shutdown costs related to this closure are as follows: Year Ended December 31, 2018 (In $ millions) Restructuring (1) 2 Accelerated depreciation expense 15 Loss on disposition of assets, net 1 Other 1 Total 19 ______________________________ (1) Included in Other (charges) gains, net in the consolidated statement of operations ( Note 18 ).

Ventures and Variable Interes_2

Ventures and Variable Interest Entities (Tables)	12 Months Ended
	Dec. 31, 2018
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, 2018 2017 (In $ millions) Cash and cash equivalents 24 19 Trade receivables, net - third party & affiliates 11 9 Property, plant and equipment (net of accumulated depreciation - 2018: $130; 2017: $90) 659 697 Intangible assets (net of accumulated amortization - 2018: $3; 2017: $2) 23 25 Other assets 5 6 Total assets (1) 722 756 Trade payables 16 16 Other liabilities (2) 4 4 Total debt 5 5 Deferred income taxes 3 3 Total liabilities 28 28 ______________________________ (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, 2018 2017 (In $ millions) Property, plant and equipment, net 42 53 Trade payables 27 25 Current installments of long-term debt 14 18 Long-term debt 57 76 Total liabilities 98 119 Maximum exposure to loss 133 164

Marketable Securities, at Fai_2

Marketable Securities, at Fair Value (Tables)	12 Months Ended
	Dec. 31, 2018
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, 2018 2017 (In $ millions) Amortized cost 31 32 Gross unrealized gain — — Gross unrealized loss — — Fair value 31 32

Receivables, Net Receivables, N

Receivables, Net Receivables, Net (Tables)	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Schedule of Trade Receivables - Third Party and Affiliates, Net	As of December 31, 2018 2017 (In $ millions) Trade receivables - third party and affiliates 1,027 995 Allowance for doubtful accounts - third party and affiliates (10 ) (9 ) Trade receivables - third party and affiliates, net 1,017 986
Schedule of Non-trade Receivables, Net	As of December 31, 2018 2017 (In $ millions) Non-income taxes receivable 176 81 Reinsurance receivables 14 16 Income taxes receivable 26 64 Other 85 83 Non-trade receivables, net 301 244

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2018
Inventory Disclosure [Abstract]
Schedule of Inventories	As of December 31, 2018 2017 (In $ millions) Finished goods 697 591 Work-in-process 70 57 Raw materials and supplies 279 252 Total 1,046 900

Investments in Affiliates (Tabl

Investments in Affiliates (Tables)	12 Months Ended
	Dec. 31, 2018
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 December 31, Carrying December 31, Share of December 31, Dividends and December 31, 2018 2017 2018 2017 2018 2017 2016 2018 2017 2016 (In percentages) (In $ millions) Engineered Materials Ibn Sina 25 25 164 178 96 58 38 (112 ) (1 ) (18 ) InfraServ GmbH & Co. Hoechst KG (1) 32 32 129 139 20 19 — (25 ) (26 ) — Fortron Industries LLC 50 50 122 111 14 17 9 (3 ) (6 ) (9 ) Korea Engineering Plastics Co., Ltd. 50 50 150 155 29 25 25 (27 ) (25 ) (11 ) Polyplastics Co., Ltd. 45 45 196 170 64 57 50 (45 ) (64 ) (54 ) Sherbrooke Capital Health and (2) 10 10 2 3 — 1 — — — — Other Activities (3) InfraServ GmbH & Co. Gendorf KG (4) 30 39 36 41 7 4 7 (5 ) (5 ) (5 ) InfraServ GmbH & Co. Hoechst KG (1) — — — — — — 22 — — (30 ) InfraServ GmbH & Co. Knapsack KG (4) 22 27 16 20 3 2 4 (4 ) (4 ) (4 ) Total 815 817 233 183 155 (221 ) (131 ) (131 ) ______________________________ (1) InfraServ GmbH & Co. Hoechst KG is owned primarily by an entity included in the Company's 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 Acetyl Chain segment also holds an ownership percentage. (2) 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. (3) 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. (4) See Note 18 for further information.
Schedule of summarized balance sheet information for Ibn Sina (National Methanol) [Table Text Block]	As of September 30, 2018 2017 (In $ millions) Current assets 448 410 Noncurrent assets 825 833 Current liabilities 200 194 Noncurrent liabilities 450 499
Schedule of Summarized Income Statement Financial Information for Ibn Sina (National Methanol) [Table Text Block]	Twelve Months Ended September 30, 2018 2017 2016 (In $ millions) Revenues 913 759 563 Gross profit 396 306 208 Net income 322 256 171
Schedule of equity securities without readily determinable fair value	Equity investments without readily determinable fair values and ownership interests by business segment are as follows: Ownership December 31, Carrying as of December 31, Dividend December 31, 2018 2017 2018 2017 2018 2017 2016 (In percentages) (In $ millions) Acetate Tow Kunming Cellulose Fibers Co. Ltd. 30 30 14 14 12 12 14 Nantong Cellulose Fibers Co. Ltd. 31 31 115 109 87 81 80 Zhuhai Cellulose Fibers Co. Ltd. 30 30 30 30 13 14 13 Other Activities InfraServ GmbH & Co. Wiesbaden KG 8 8 5 5 1 1 1 Other — 1 4 — — Total 164 159 117 108 108
Schedule of Transactions with Affiliates	Transactions and balances with affiliates are as follows: Year Ended December 31, 2018 2017 2016 (In $ millions) Purchases 305 250 203 Sales and other credits 117 77 43 Interest expense 1 — —
Schedule of Balances with Affiliates	As of December 31, 2018 2017 (In $ millions) Non-trade receivables 29 21 Total due from affiliates 29 21 Short-term borrowings (1) 50 32 Trade payables 46 36 Current Other liabilities 11 8 Total due to affiliates 107 76 ______________________________ (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.

Property, Plant and Equipment_2

Property, Plant and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment, Net [Abstract]
Schedule of Property, Plant and Equipment, Net	As of December 31, 2018 2017 (In $ millions) Land 46 47 Land improvements 77 72 Buildings and building improvements 760 758 Machinery and equipment 5,223 5,101 Construction in progress 416 368 Gross asset value 6,522 6,346 Accumulated depreciation (2,803 ) (2,584 ) Net book value 3,719 3,762
Schedule of Assets Under Capital Leases	Assets under capital leases, net, included in the amounts above are as follows: As of December 31, 2018 2017 (In $ millions) Buildings 14 14 Machinery and equipment 279 296 Accumulated depreciation (188 ) (179 ) Net book value 105 131
Schedule of Capitalized Interest and Depreciation Expense	Capitalized interest costs and depreciation expense are as follows: Year Ended December 31, 2018 2017 2016 (In $ millions) Capitalized interest 10 6 5 Depreciation expense 319 285 281

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets, Net (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	Goodwill Engineered Acetate Tow Acetyl Total (In $ millions) As of December 31, 2016 462 148 186 796 Acquisitions ( Note 4 ) 128 — — 128 Exchange rate changes 53 1 25 79 As of December 31, 2017 643 149 211 1,003 Acquisitions ( Note 4 ) 84 — — 84 Exchange rate changes (20 ) (1 ) (9 ) (30 ) As of December 31, 2018 (1) 707 148 202 1,057 ______________________________ (1) There were $0 million of accumulated impairment losses as of December 31, 2018 .
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, 2016 36 509 35 53 633 Acquisitions ( Note 4 ) — 73 9 — 82 (1) Exchange rate changes 2 58 1 1 62 As of December 31, 2017 38 640 45 54 777 Acquisitions ( Note 4 ) — 32 — 3 35 (2) Renewals 6 (3 ) — — — 6 Exchange rate changes (2 ) (21 ) (1 ) (1 ) (25 ) As of December 31, 2018 42 651 44 56 793 Accumulated Amortization 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 ) Amortization (2 ) (16 ) (3 ) (3 ) (24 ) Exchange rate changes 2 17 1 — 20 As of December 31, 2018 (33 ) (495 ) (32 ) (35 ) (595 ) Net book value 9 156 12 21 198 ______________________________ (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 Omni Plastics ( Note 4 ) during the year ended December 31, 2018 , with a weighted average amortization period of 11 years . (3) During the year ended December 31, 2018 , the Company extended a research and development technology agreement license, which will be amortized over a period of 5 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, 2016 85 Acquisitions ( Note 4 ) 22 Exchange rate changes 8 As of December 31, 2017 115 Acquisitions ( Note 4 ) — Exchange rate changes (3 ) As of December 31, 2018 112
Schedule of Estimated Amortization Expense	Estimated amortization expense for the succeeding five fiscal years is as follows: (In $ millions) 2019 22 2020 20 2021 19 2022 17 2023 15

Current Other Liabilities (Tabl

Current Other Liabilities (Tables)	12 Months Ended
	Dec. 31, 2018
Other Liabilities, Current [Abstract]
Schedule of Current Other Liabilities	As of December 31, 2018 2017 (In $ millions) Asset retirement obligations 3 19 Benefit obligations ( Note 15 ) 30 30 Customer rebates 76 65 Derivatives ( Note 22 ) 7 3 Environmental ( Note 16 ) 20 14 Insurance 4 5 Interest 21 17 Restructuring ( Note 18 ) 4 5 Salaries and benefits 119 113 Sales and use tax/foreign withholding tax payable 22 16 Other 37 67 Total 343 354

Noncurrent Other Liabilities (T

Noncurrent Other Liabilities (Tables)	12 Months Ended
	Dec. 31, 2018
Other Liabilities, Noncurrent [Abstract]
Schedule of Noncurrent Other Liabilities	As of December 31, 2018 2017 (In $ millions) Asset retirement obligations 13 7 Deferred proceeds 44 47 Deferred revenue 7 6 Derivatives ( Note 22 ) 11 — Environmental ( Note 16 ) 49 59 Income taxes payable ( Note 19 ) — 197 Insurance 37 43 Other 47 54 Total 208 413
Schedule of Changes in Asset Retirement Obligations	Changes in asset retirement obligations are as follows: Year Ended December 31, 2018 2017 2016 (In $ millions) Balance at beginning of year 26 29 36 Additions (1) 2 — 2 Accretion — 1 1 Payments (4 ) (5 ) (10 ) Revisions to cash flow estimates (2) (8 ) 1 — Balance at end of year 16 26 29 ______________________________ (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.

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2018
Line of Credit Facility [Line Items]
Schedule of Short-term Debt	As of December 31, 2018 2017 (In $ millions) Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates Current installments of long-term debt 367 63 Short-term borrowings, including amounts due to affiliates (1) 77 86 Revolving credit facility (2) 40 97 Accounts receivable securitization facility (3) 77 80 Total 561 326 ______________________________ (1) The weighted average interest rate was 3.2% and 3.4% as of December 31, 2018 and 2017 , respectively. (2) The weighted average interest rate was 6.0% and 4.1% as of December 31, 2018 and 2017 , respectively. (3) The weighted average interest rate was 3.1% and 2.1% as of December 31, 2018 and 2017 , respectively. As of December 31, 2018 2017 (In $ millions) Long-Term Debt Senior unsecured term loan due 2021 (1) — 494 Senior unsecured notes due 2019, interest rate of 3.250% 343 360 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% 857 897 Senior unsecured notes due 2025, interest rate of 1.250% 343 359 Senior unsecured notes due 2027, interest rate of 2.125% 568 — Pollution control and industrial revenue bonds due at various dates through 2030, interest rates ranging from 4.05% to 5.00% 167 169 Nilit bank loans due at various dates through 2026 ( Note 4 ) (2) 10 11 Obligations under capital leases due at various dates through 2054 167 208 Subtotal 3,355 3,398 Unamortized debt issuance costs (3) (18 ) (20 ) Current installments of long-term debt (367 ) (63 ) Total 2,970 3,315 ____
Schedule of Long-term Debt	As of December 31, 2018 2017 (In $ millions) Long-Term Debt Senior unsecured term loan due 2021 (1) — 494 Senior unsecured notes due 2019, interest rate of 3.250% 343 360 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% 857 897 Senior unsecured notes due 2025, interest rate of 1.250% 343 359 Senior unsecured notes due 2027, interest rate of 2.125% 568 — Pollution control and industrial revenue bonds due at various dates through 2030, interest rates ranging from 4.05% to 5.00% 167 169 Nilit bank loans due at various dates through 2026 ( Note 4 ) (2) 10 11 Obligations under capital leases due at various dates through 2054 167 208 Subtotal 3,355 3,398 Unamortized debt issuance costs (3) (18 ) (20 ) Current installments of long-term debt (367 ) (63 ) Total 2,970 3,315 ______________________________ (1) The margin for borrowings under the senior unsecured term loan due 2021 was 1.5% above LIBOR at Celanese credit ratings as of December 31, 2017 . (2) The weighted average interest rate was 1.3% and 1.3% as of December 31, 2018 and 2017 , respectively. (3) Related to the Company's long-term debt, excluding obligations under capital leases.
Schedule of Principle Payments	Principal payments scheduled to be made on the Company's debt, including short-term borrowings, are as follows: (In $ millions) 2019 561 2020 27 2021 430 2022 524 2023 875 Thereafter 1,132 Total 3,549
Schedule of Net Deferred Financing Costs	Net deferred financing costs are as follows: (In $ millions) As of December 31, 2015 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 Financing costs deferred (5) 4 Accelerated amortization due to refinancing activity (1 ) Amortization (6 ) As of December 31, 2018 (1) 21 ____________________________ (1) Includes $3 million , $4 million and $6 million as of December 31, 2018 , 2017 and 2016 , 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. (5) Related to the 2.125% Notes, which are being amortized through the term of the 2.125% Notes.
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, 2018 (In $ millions) Accounts Receivable Securitization Facility Borrowings outstanding (1) 77 Letters of credit issued 29 Available for borrowing 14 Total borrowing base 120 Maximum borrowing base (2) 120 ______________________________ (1) The Company borrowed $25 million and repaid $28 million during the year ended December 31, 2018 . (2) Outstanding accounts receivable transferred to the SPE was $185 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, 2018 (In $ millions) Revolving Credit Facility Borrowings outstanding (1) 40 Letters of credit issued — Available for borrowing 960 ______________________________ (1) The Company borrowed $940 million and repaid $997 million under its senior unsecured revolving credit facility during the year ended December 31, 2018 .

Benefit Obligations (Tables)

Benefit Obligations (Tables)	12 Months Ended
	Dec. 31, 2018
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, 2018 2017 2016 (In $ millions) Multiemployer defined benefit plan 8 7 7
Schedule of Postemployment Obligations	Postemployment obligations are as follows: As of December 31, 2018 2017 (In $ millions) Postemployment benefits 8 8
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, 2018 2017 2016 (In $ millions) Defined contribution plans 40 40 43
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 Postretirement Benefits 2018 2017 2018 2017 (In $ millions) Change in Projected Benefit Obligation Projected benefit obligation as of beginning of period 3,728 3,610 66 67 Service cost 9 9 1 1 Interest cost 104 107 2 1 Net actuarial (gain) loss (1) (163 ) 151 (4 ) (2 ) Settlements — (1 ) — — Benefits paid (235 ) (233 ) (4 ) (4 ) Curtailments (1 ) — — — Special termination benefits 2 1 — — Exchange rate changes (32 ) 69 (2 ) 3 Other (2) — 15 — — Projected benefit obligation as of end of period 3,412 3,728 59 66 Change in Plan Assets Fair value of plan assets as of beginning of period 3,251 2,784 — — Actual return on plan assets (124 ) 302 — — Employer contributions 43 359 4 4 Settlements — (1 ) — — Benefits paid (3) (235 ) (233 ) (4 ) (4 ) Exchange rate changes (20 ) 40 — — Fair value of plan assets as of end of period 2,915 3,251 — — Funded status as of end of period (497 ) (477 ) (59 ) (66 ) Amounts Recognized in the Consolidated Balance Sheets Consist of: Noncurrent Other assets 30 64 — — Current Other liabilities (24 ) (24 ) (5 ) (5 ) Benefit obligations (503 ) (517 ) (54 ) (61 ) Net amount recognized (497 ) (477 ) (59 ) (66 ) Amounts Recognized in Accumulated Other Comprehensive Income Consist of: Net actuarial (gain) loss (4) 8 9 — — Prior service (benefit) cost — (1 ) — 1 Net amount recognized (5) 8 8 — 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, 2018 and 2017 , respectively. (4) Relates to the pension plans of the Company's equity method investments. (5) Amount shown net of an income tax benefit of $5 million and $6 million as of December 31, 2018 and 2017 , 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 Postretirement Benefits 2018 2017 2018 2017 (In percentages) US plans 82 83 57 54 International plans 18 17 43 46 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 2018 2017 (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, 2018 2017 (In $ millions) Projected benefit obligation 840 882 Fair value of plan assets 314 341
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, 2018 2017 (In $ millions) Accumulated benefit obligation 749 861 Fair value of plan assets 243 338
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, 2018 2017 (In $ millions) Accumulated benefit obligation 3,390 3,710
Schedule of Net Periodic Benefit Costs	The components of net periodic benefit cost are as follows: Pension Benefits Postretirement Benefits 2018 2017 2016 2018 2017 2016 (In $ millions) Service cost 9 9 8 1 1 — Interest cost 104 107 113 2 1 2 Expected return on plan assets (210 ) (198 ) (177 ) — — — Amortization of prior service cost / (credit) — — — — (1 ) (3 ) Recognized actuarial (gain) loss 169 48 101 (4 ) (2 ) 2 Curtailment (gain) loss (1 ) — — — — — Special termination benefit 2 1 3 — — — Total 73 (33 ) 48 (1 ) (1 ) 1
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 2019 is expected to be as follows: Pension Benefits Postretirement Benefits (In $ millions) Prior service cost — — Total — —
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, 2018 2017 (In $ millions) Nonqualified Trust Assets Marketable securities, at fair value 31 32 Noncurrent Other assets, consisting of insurance contracts 37 42 Nonqualified Pension Obligations Current Other liabilities 21 22 Benefit obligations 213 237
Schedule of Expense Related to Nonqualified Pension Plans Included in Net Periodic Benefit Cost, Excluding Returns on Assets	xpense 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, 2018 2017 2016 (In $ millions) Total (3 ) 18 18
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 Postretirement Benefits 2018 2017 2018 2017 (In percentages) Discount Rate Obligations US plans 4.2 3.5 4.1 3.4 International plans 2.1 2.1 3.4 3.2 Combined 3.8 3.3 3.8 3.2 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 Postretirement Benefits 2018 2017 2016 2018 2017 2016 (In percentages) Discount Rate Obligations US plans 3.5 3.9 4.2 3.4 3.8 4.0 International plans 2.1 2.1 2.6 3.2 3.3 3.6 Combined 3.3 3.7 4.0 3.2 3.4 3.9 Discount Rate Service Cost (1) US plans 1.9 1.2 4.5 3.7 4.0 4.2 International plans 2.3 2.5 3.1 3.3 3.4 3.8 Combined 2.2 2.5 3.1 2.9 2.9 3.8 Discount Rate Interest Cost (1) US plans 3.1 3.3 3.4 3.0 3.1 3.1 International plans 1.7 1.7 2.2 2.9 2.9 3.1 Combined 2.9 3.1 3.2 2.9 2.9 3.1 Expected Return on Plan Assets US plans 6.8 7.5 7.5 International plans 5.9 5.9 6.1 Combined 6.7 7.3 7.3 Rate of Compensation Increase US plans N/A N/A N/A International plans 2.8 2.8 2.7 Combined 2.8 2.8 2.7 ______________________________ (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, 2018 2017 2016 (In percentages, except year) Health care cost trend rate assumed for next year 8.5 9.0 9.5 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 1.5 1.8 Service and interest cost — —
Schedule of Weighted Average Target Asset Allocations	The weighted average target asset allocations for the Company's pension plans in 2018 are as follows: US Plans International Plans (In percentages) Bonds - domestic to plans 80 59 Equities - domestic to plans 10 16 Equities - international to plans 10 — Other — 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, 2018 2017 2018 2017 2018 2017 (In $ millions) Assets Cash and cash equivalents 2 5 — — 2 5 Derivatives Swaps — — 3 8 3 8 Equity securities International companies 59 72 — — 59 72 Fixed income Corporate debt — — 691 776 691 776 Treasuries, other debt 127 48 1,293 1,411 1,420 1,459 Mortgage backed securities — — 8 7 8 7 Insurance contracts — — 35 36 35 36 Other 4 4 1 1 5 5 Total investments, at fair value (1) 192 129 2,031 2,239 2,223 2,368 Liabilities Derivatives Swaps — — 3 7 3 7 Total liabilities — — 3 7 3 7 Total net assets (2) 192 129 2,028 2,232 2,220 2,361 ______________________________ (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, 2018 excludes investments in common/collective trusts, registered investment companies and short-term investment funds with fair values of $595 million , $54 million and $29 million , respectively. 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. (2) Total net assets excludes non-financial plan receivables and payables of $36 million and $19 million , respectively, as of December 31, 2018 and $25 million and $18 million , respectively, as of December 31, 2017 . Non-financial items include due to/from broker, interest receivables and accrued expenses.
Schedule of Company Commitments to Fund Benefit Obligations	Benefit obligation funding is as follows: Total Expected 2019 (In $ millions) Cash contributions to defined benefit pension plans 22 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) 2019 234 5 2020 232 4 2021 227 4 2022 225 4 2023 224 4 2024-2028 1,072 18 ______________________________ (1) Payments are expected to be made primarily from plan assets. (2) Payments are expected to be made primarily from Company assets.

Environmental (Tables)

Environmental (Tables)	12 Months Ended
	Dec. 31, 2018
Environmental Remediation Obligations [Abstract]
Schedule of Environmental Remediation Reserves	The components of environmental remediation reserves are as follows: As of December 31, 2018 2017 (In $ millions) Demerger obligations ( Note 24 ) 26 28 Divestiture obligations ( Note 24 ) 16 17 Active sites 14 15 US Superfund sites 11 11 Other environmental remediation reserves 2 2 Total 69 73
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, 2018 Ownership Liability Reserves (1) (In percentages) (In $ millions) InfraServ GmbH & Co. Gendorf KG 30 10 8 InfraServ GmbH & Co. Hoechst KG 32 40 69 InfraServ GmbH & Co. Knapsack KG 22 22 1 ______________________________ (1) Gross reserves maintained by the respective InfraServ entity.

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2018
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 2016 20 0.36 1.44 May 2016 April 2017 28 0.46 1.84 May 2017 April 2018 17 0.54 2.16 May 2018
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 2018 2017 2016 Shares repurchased 7,933,692 (1) 5,436,803 7,034,420 47,712,711 Average purchase price per share $ 103.01 $ 91.97 $ 71.08 $ 66.08 Amount spent on repurchased shares (in millions) $ 817 $ 500 $ 500 $ 3,153 Aggregate Board of Directors repurchase authorizations during the period (in millions) (2) $ — $ 1,500 $ — $ 3,866 ______________________________ (1) Excludes 1,700 common shares reacquired pursuant to an employee clawback agreement. (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, 2018 2017 2016 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 (65 ) 5 (60 ) 162 12 174 (22 ) 11 (11 ) Gain (loss) on cash flow hedges (12 ) 2 (10 ) — (1 ) (1 ) 5 — 5 Pension and postretirement benefits 1 (1 ) — 7 2 9 (5 ) 1 (4 ) Total (76 ) 6 (70 ) 169 12 181 (22 ) 12 (10 )
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, 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 ) Other comprehensive income (loss) before reclassifications — (65 ) (11 ) 1 (75 ) Amounts reclassified from accumulated other comprehensive income (loss) — — (1 ) — (1 ) Income tax (provision) benefit — 5 2 (1 ) 6 As of December 31, 2018 — (236 ) (8 ) (3 ) (247 )

Other (Charges) Gains, Net (Tab

Other (Charges) Gains, Net (Tables)	12 Months Ended
	Dec. 31, 2018
Restructuring and Related Activities [Abstract]
Schedule of Other (Charges) Gains, Net	Year Ended December 31, 2018 2017 2016 (In $ millions) Restructuring ( Note 4 ) (4 ) (3 ) (8 ) InfraServ ownership change — (4 ) — Asset impairments — — (2 ) Plant/office closures 13 (52 ) — Commercial disputes — — 2 Total 9 (59 ) (8 )
Schedule of Restructuring Reserve	During the year ended December 31, 2016, the Company recorded $8 million of employee termination benefits primarily related to the Company's ongoing efforts to align its businesses around its core value drivers. The changes in the restructuring reserves by business segment are as follows: Engineered Materials Acetate Tow Acetyl Chain Other Total (In $ millions) Employee Termination Benefits As of December 31, 2016 2 8 3 3 16 Additions 1 2 — 1 4 Cash payments (2 ) (2 ) (2 ) (2 ) (8 ) Other changes — (8 ) — (1 ) (9 ) Exchange rate changes — — — — — As of December 31, 2017 1 — 1 1 3 Additions — 2 2 — 4 Cash payments (1 ) — (1 ) (1 ) (3 ) Other changes — — — — — Exchange rate changes — — — — — As of December 31, 2018 — 2 2 — 4 Other Plant/Office Closures 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 Additions — — — — — Cash payments — — (2 ) — (2 ) Other changes — — — — — Exchange rate changes — — — — — As of December 31, 2018 — — — — — Total — 2 2 — 4

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
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, 2018 2017 2016 (In $ millions) US 480 262 326 International 1,030 813 704 Total 1,510 1,075 1,030
Schedule of Income Tax Provision (Benefit)	The income tax provision (benefit) consists of the following: Year Ended December 31, 2018 2017 2016 (In $ millions) Current US (184 ) 201 (22 ) International 143 158 60 Total (41 ) 359 38 Deferred US 314 (110 ) 108 International 19 (36 ) (24 ) Total 333 (146 ) 84 Total 292 213 122
Schedule of Effective Tax Rate Reconciliation	A reconciliation of the significant differences between the US federal statutory tax rate of 21% ( 35% for 2017 and 2016) and the effective income tax rate on income from continuing operations is as follows: Year Ended December 31, 2018 2017 2016 (In $ millions, except percentages) Income tax provision computed at US federal statutory tax rate 317 376 361 Change in valuation allowance 94 218 (18 ) Equity income and dividends (48 ) (87 ) (60 ) (Income) expense not resulting in tax impact, net (51 ) (157 ) (152 ) US tax effect of foreign earnings and dividends 25 521 302 Foreign tax credits (20 ) (759 ) (293 ) Other foreign tax rate differentials 17 (38 ) (48 ) Legislative changes (59 ) 116 4 State income taxes, net of federal benefit 4 12 8 Other, net 13 11 18 Income tax provision (benefit) 292 213 122 Effective income tax rate 19 % 20 % 12 %
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, 2018 2017 (In $ millions) Deferred Tax Assets Pension and postretirement obligations 138 143 Accrued expenses 61 50 Inventory 13 10 Net operating loss carryforwards 616 703 Tax credit carryforwards (1) 330 478 Other 195 192 Subtotal 1,353 1,576 Valuation allowance (2) (899 ) (618 ) Total 454 958 Deferred Tax Liabilities Depreciation and amortization 375 307 Investments in affiliates 203 427 Other 47 69 Total 625 803 Net deferred tax assets (liabilities) (171 ) 155 ______________________________ (1) For the year ended December 31, 2018 , the tax credit carryforwards decreased primarily due to the consumption of US foreign tax credits resulting from the deemed repatriation tax required by the TCJA. (2) Includes deferred tax asset valuation allowances for the Company's deferred tax assets in the US, Luxembourg, Spain, China, 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, 2018 2017 2016 (In $ millions) As of the beginning of the year 119 114 158 Increases in tax positions for the current year 61 14 9 Increases in tax positions for prior years (1) 4 4 11 Decreases in tax positions for prior years (21 ) (7 ) (9 ) Decreases due to settlements (1 ) (6 ) (55 ) As of the end of the year 162 119 114 Total uncertain tax positions that if recognized would impact the effective tax rate 154 100 87 Total amount of interest expense (benefit) and penalties recognized in the consolidated statements of operations (2) 1 6 (16 ) Total amount of interest expense and penalties recognized in the consolidated balance sheets 38 38 26 ______________________________ (1) Includes uncertain tax positions related to the Nilit acquisition ( Note 4 ) of $4 million for the year ended December 31, 2018 . (2) This amount reflects interest on uncertain tax positions and release of certain tax positions as a result of an audit closure that was reflected in the consolidated statements of operations.

Management Compensation Plans (

Management Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2018
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, 2018 Shares Available for Awards Shares Subject to Outstanding Awards 2018 GIP 7,256,282 50,003 2009 GIP — 1,995,089
Schedule of Realized Income Tax Benefits from Stock Option Exercises and RSU Vestings	The Company realized income tax benefits from RSU vestings as follows: Year Ended December 31, 2018 2017 2016 (In $ millions) Income tax benefit realized 7 9 7
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, 2017 860 64.71 Granted 227 94.54 Vested (73 ) 53.23 Canceled (140 ) 53.24 Forfeited (62 ) 75.43 As of December 31, 2018 812 75.25
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, 2017 351 75.75 Granted 283 93.62 Vested (201 ) 78.56 Forfeited (47 ) 81.44 As of December 31, 2018 386 86.69
Schedule of Share-based Compensation, Restricted Stock Units, Weighted Average Grant Date Fair Value Activity	The weighted average grant date fair value of RSUs granted is as follows: Year Ended December 31, 2018 2017 2016 (In $ millions) Total 48 59 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, 2018 2017 2016 (In $ millions) Total 8 42 64
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, 2018 2017 2016 (In $ millions) Total 21 12 4

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2018
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, 2018 Capital Leases (In $ millions) 2019 42 2020 42 2021 40 2022 32 2023 23 Later years 88 Sublease income — Minimum lease commitments 267 Less amounts representing interest (100 ) Present value of net minimum lease obligations 167
Schedule of Future Minimum Rental Payments for Operating Leases	As of December 31, 2018 Operating Leases (In $ millions) 2019 43 2020 34 2021 25 2022 23 2023 21 Later years 130 Sublease income — Minimum lease commitments 276
Schedule of Rent Expense	Rent expense recorded under all operating leases is as follows: Year Ended December 31, 2018 2017 2016 (In $ millions) Total 96 91 77

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2018
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: 2019 Maturity (In $ millions) Currency Brazilian real (14 ) British pound sterling (84 ) Canadian dollar 33 Chinese yuan (74 ) Euro 106 Hungarian forint 11 Indonesian rupiah (13 ) Japanese yen (2 ) Korean won 15 Mexican peso (68 ) Singapore dollar 41 Swedish krona (6 ) Total (55 )
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 2018 2017 2016 (In $ millions) Hedging activities 1 4 2 Cost of sales; Interest expense 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, 2018 2017 2016 2018 2017 2016 (In $ millions) Designated as Cash Flow Hedges Commodity swaps (2 ) 4 7 1 5 2 Cost of sales Interest rate swaps (10 ) — — — — — Interest expense Foreign currency forwards 1 (1 ) — — (1 ) — Cost of sales Total (11 ) 3 7 1 4 2 Designated as Net Investment Hedges Foreign currency denominated debt ( Note 14 ) 51 (119 ) 61 — — — N/A Foreign currency forwards — 2 — — — — N/A Total 51 (117 ) 61 — — — Not Designated as Hedges Foreign currency forwards and swaps — — — 13 2 14 Foreign exchange gain (loss), net; Other income (expense), net Total — — — 13 2 14
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, 2018 2017 (In $ millions) Derivative Assets Gross amount recognized 11 13 Gross amount offset in the consolidated balance sheets 2 4 Net amount presented in the consolidated balance sheets 9 9 Gross amount not offset in the consolidated balance sheets 3 3 Net amount 6 6
Offsetting Liabilities	As of December 31, 2018 2017 (In $ millions) Derivative Liabilities Gross amount recognized 20 7 Gross amount offset in the consolidated balance sheets 2 4 Net amount presented in the consolidated balance sheets 18 3 Gross amount not offset in the consolidated balance sheets 3 3 Net amount 15 —
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, 2018 2017 (In $ millions) Total 1,071 740
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, 2018 2017 (In € millions) Total 1,550 1,050

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis	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, 2018 2017 2018 2017 2018 2017 (In $ millions) Derivatives Designated as Cash Flow Hedges Commodity swaps — — 1 2 1 2 Current Other assets Commodity swaps — — — 2 — 2 Noncurrent Other assets Derivatives Not Designated as Hedges Foreign currency forwards and swaps — — 8 5 8 5 Current Other assets Total assets — — 9 9 9 9 Derivatives Designated as Cash Flow Hedges Commodity swaps — — (1 ) — (1 ) — Noncurrent Other liabilities Interest rate swaps — — (10 ) — (10 ) — Noncurrent Other liabilities Derivatives Not Designated as Hedges Foreign currency forwards and swaps — — (7 ) (3 ) (7 ) (3 ) Current Other liabilities Total liabilities — — (18 ) (3 ) (18 ) (3 )
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, 2018 2017 2018 2017 2018 2017 2018 2017 (In $ millions) Equity investments without readily determinable fair values 164 159 — — — — — — Insurance contracts in nonqualified trusts 37 42 37 42 — — 37 42 Long-term debt, including current installments of long-term debt 3,355 3,398 3,204 3,299 168 208 3,372 3,507

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2018
Supplemental Cash Flow Information [Abstract]
Schedule of Supplemental Cash Flow Information	Year Ended December 31, 2018 2017 2016 (In $ millions) Interest paid, net of amounts capitalized 133 130 130 Taxes paid, net of refunds 100 123 129 Noncash Investing and Financing Activities Accrued treasury stock repurchases 13 — — Accrued capital expenditures (4 ) 14 1 Asset retirement obligations (7 ) 2 2 Fair value adjustment to securities available for sale, net of tax — (1 ) —

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Schedule of Business Segments	Engineered Materials Acetate Tow Acetyl Chain Other Activities Eliminations Consolidated (In $ millions) Year Ended December 31, 2018 Net sales 2,593 649 (1) 4,042 (2) — (129 ) 7,155 Other (charges) gains, net ( Note 18 ) — (2 ) 11 — — 9 Operating profit (loss) 460 130 1,024 (280 ) — 1,334 Equity in net earnings (loss) of affiliates 218 — 6 9 — 233 Depreciation and amortization 126 58 148 11 — 343 Capital expenditures 105 29 182 17 — 333 (3) As of December 31, 2018 Goodwill and intangible assets, net 974 153 240 — — 1,367 Total assets 4,012 1,032 3,471 798 — 9,313 Year Ended December 31, 2017 - As Adjusted ( Note 3 ) Net sales 2,213 668 (1) 3,371 (2) — (112 ) 6,140 Other (charges) gains, net ( Note 18 ) (2 ) (2 ) (52 ) (3 ) — (59 ) Operating profit (loss) 412 189 509 (253 ) — 857 Equity in net earnings (loss) of affiliates 171 — 6 6 — 183 Depreciation and amortization 111 41 143 10 — 305 Capital expenditures 78 39 150 14 — 281 (3) As of December 31, 2017 Goodwill and intangible assets, net 902 154 248 — — 1,304 Total assets 3,866 1,163 3,518 991 — 9,538 Year Ended December 31, 2016 - As Adjusted ( Note 3 ) Net sales 1,552 821 (1) 3,132 (2) — (116 ) 5,389 Other (charges) gains, net ( Note 18 ) (2 ) (1 ) (5 ) — — (8 ) Operating profit (loss) 377 276 443 (163 ) 1 934 Equity in net earnings (loss) of affiliates 125 — 6 24 — 155 Depreciation and amortization 95 42 141 12 — 290 Capital expenditures 75 36 124 12 — 247 (3) ______________________________ (1) Includes intersegment sales of $0 million , $2 million , and $0 million for the years ended December 31, 2018 , 2017 and 2016 , respectively. (2) Includes intersegment sales of $129 million , $110 million and $116 million for the years ended December 31, 2018 , 2017 and 2016 , respectively. (3) Includes a decrease in accrued capital expenditures of $4 million for the year ended December 31, 2018 and an increase in accrued capital expenditures of $14 million and $1 million for the years ended December 31, 2017 and 2016 , respectively.
Schedule of Geographical Segments	The net sales to external customers based on geographic location are as follows: Year Ended December 31, 2018 2017 2016 (In $ millions) Belgium 261 295 408 Canada 115 92 123 China 1,070 833 745 Germany 2,335 1,776 1,540 Mexico 307 257 214 Singapore 997 867 758 US 1,769 1,572 1,451 Other 301 448 150 Total 7,155 6,140 5,389 Property, plant and equipment, net based on the geographic location of the Company's facilities is as follows: As of December 31, 2018 2017 (In $ millions) Belgium 54 57 Canada 114 128 China 331 363 Germany 903 979 Mexico 144 162 Singapore 83 87 US 1,961 1,857 Other 129 129 Total 3,719 3,762

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	Further disaggregation of Net sales by business segment and geographic destination is as follows: Year Ended December 31, 2018 (In $ millions) Engineered Materials North America 770 Europe and Africa 1,216 Asia-Pacific 532 South America 75 Total 2,593 Acetate Tow North America 133 Europe and Africa 260 Asia-Pacific 217 South America 39 Total 649 Acetyl Chain North America 1,145 Europe and Africa 1,236 Asia-Pacific 1,411 South America 121 Total (1) 3,913 ______________________________ (1) Excludes intersegment sales of $129 million for the year ended December 31, 2018 .

Earnings (Loss) Per Share (Tabl

Earnings (Loss) Per Share (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Schedule of Earnings (Loss) Per Share	Year Ended December 31, 2018 2017 2016 (In $ millions, except share data) Amounts attributable to Celanese Corporation Earnings (loss) from continuing operations 1,212 856 902 Earnings (loss) from discontinued operations (5 ) (13 ) (2 ) Net earnings (loss) 1,207 843 900 Weighted average shares - basic 134,305,269 137,902,667 144,939,433 Incremental shares attributable to equity awards (1) 1,111,589 414,728 728,748 Weighted average shares - diluted 135,416,858 138,317,395 145,668,181 ______________________________ (1) Excludes 0 , 29 and 836 equity award shares for the years ended December 31, 2018 , 2017 and 2016 , respectively, as their effect would have been antidilutive.

Consolidating Guarantor Finan_2

Consolidating Guarantor Financial Information (Tables)	12 Months Ended
	Dec. 31, 2018
Consolidating Guarantor Financial Information [Abstract]
Schedule of Consolidating Statements of Operations	CELANESE CORPORATION AND SUBSIDIARIES CONSOLIDATING STATEMENT OF OPERATIONS Year Ended December 31, 2018 Parent Guarantor Issuer Subsidiary Guarantors Non- Guarantors Eliminations Consolidated (In $ millions) Net sales — — 2,387 5,954 (1,186 ) 7,155 Cost of sales — — (1,898 ) (4,471 ) 1,186 (5,183 ) Gross profit — — 489 1,483 — 1,972 Selling, general and administrative expenses — — (213 ) (333 ) — (546 ) Amortization of intangible assets — — (8 ) (16 ) — (24 ) Research and development expenses — — (30 ) (42 ) — (72 ) Other (charges) gains, net — — — 9 — 9 Foreign exchange gain (loss), net — (3 ) — 3 — — Gain (loss) on disposition of businesses and assets, net — — (10 ) 5 — (5 ) Operating profit (loss) — (3 ) 228 1,109 — 1,334 Equity in net earnings (loss) of affiliates 1,207 1,202 1,033 220 (3,429 ) 233 Non-operating pension and other postretirement employee benefit (expense) income — — (28 ) (34 ) — (62 ) Interest expense — (30 ) (118 ) (33 ) 56 (125 ) Refinancing expense — (1 ) — — — (1 ) Interest income — 45 7 10 (56 ) 6 Dividend income - equity investments — — — 113 4 117 Other income (expense), net — 5 1 3 (1 ) 8 Earnings (loss) from continuing operations before tax 1,207 1,218 1,123 1,388 (3,426 ) 1,510 Income tax (provision) benefit — (11 ) (106 ) (176 ) 1 (292 ) Earnings (loss) from continuing operations 1,207 1,207 1,017 1,212 (3,425 ) 1,218 Earnings (loss) from operation of discontinued operations — — 3 (8 ) — (5 ) Gain (loss) on disposition of discontinued operations — — — — — — Income tax (provision) benefit from discontinued operations — — (1 ) 1 — — Earnings (loss) from discontinued operations — — 2 (7 ) — (5 ) Net earnings (loss) 1,207 1,207 1,019 1,205 (3,425 ) 1,213 Net (earnings) loss attributable to noncontrolling interests — — — (6 ) — (6 ) Net earnings (loss) attributable to Celanese Corporation 1,207 1,207 1,019 1,199 (3,425 ) 1,207 CELANESE CORPORATION AND SUBSIDIARIES CONSOLIDATING STATEMENT OF OPERATIONS Year Ended December 31, 2017 - As Adjusted ( Note 3 ) Parent Guarantor Issuer Subsidiary Guarantors Non- Guarantors Eliminations Consolidated (In $ millions) Net sales — — 2,240 5,013 (1,113 ) 6,140 Cost of sales — — (1,723 ) (4,014 ) 1,108 (4,629 ) Gross profit — — 517 999 (5 ) 1,511 Selling, general and administrative expenses — — (189 ) (307 ) — (496 ) Amortization of intangible assets — — (4 ) (16 ) — (20 ) Research and development expenses — — (32 ) (41 ) — (73 ) Other (charges) gains, net — — (6 ) (53 ) — (59 ) Foreign exchange gain (loss), net — — — (1 ) — (1 ) Gain (loss) on disposition of businesses and assets, net — — (8 ) 3 — (5 ) Operating profit (loss) — — 278 584 (5 ) 857 Equity in net earnings (loss) of affiliates 843 867 591 166 (2,284 ) 183 Non-operating pension and other postretirement employee benefit (expense) income — — 60 (16 ) — 44 Interest expense — (20 ) (104 ) (30 ) 32 (122 ) Refinancing expense — — — — — — Interest income — 25 4 5 (32 ) 2 Dividend income - equity 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 - As Adjusted ( Note 3 ) Parent Guarantor Issuer Subsidiary Guarantors Non- Guarantors Eliminations Consolidated (In $ millions) Net sales — — 2,162 4,322 (1,095 ) 5,389 Cost of sales — — (1,658 ) (3,427 ) 1,101 (3,984 ) Gross profit — — 504 895 6 1,405 Selling, general and administrative expenses — — (113 ) (265 ) — (378 ) Amortization of intangible assets — — (5 ) (4 ) — (9 ) Research and development expenses — — (32 ) (46 ) — (78 ) Other (charges) gains, net — — — (8 ) — (8 ) Foreign exchange gain (loss), net — — — (1 ) — (1 ) Gain (loss) on disposition of businesses and assets, net — — (8 ) 17 (6 ) 3 Operating profit (loss) — — 346 588 — 934 Equity in net earnings (loss) of affiliates 898 939 653 146 (2,481 ) 155 Non-operating pension and other postretirement employee benefit (expense) income — — 2 (43 ) — (41 ) Interest expense — (16 ) (94 ) (29 ) 19 (120 ) Refinancing expense — (4 ) (2 ) — — (6 ) Interest income — 12 4 5 (19 ) 2 Dividend income - equity 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
Schedule of Consolidating Statements of Comprehensive Income (Loss)	CELANESE CORPORATION AND SUBSIDIARIES CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME (LOSS) Year Ended December 31, 2018 Parent Guarantor Issuer Subsidiary Guarantors Non- Guarantors Eliminations Consolidated (In $ millions) Net earnings (loss) 1,207 1,207 1,019 1,205 (3,425 ) 1,213 Other comprehensive income (loss), net of tax Unrealized gain (loss) on marketable securities — — 6 13 (19 ) — Foreign currency translation (60 ) (60 ) (90 ) (109 ) 259 (60 ) Gain (loss) from cash flow hedges (10 ) (10 ) (2 ) (1 ) 13 (10 ) Pension and postretirement benefits — — — — — — Total other comprehensive income (loss), net of tax (70 ) (70 ) (86 ) (97 ) 253 (70 ) Total comprehensive income (loss), net of tax 1,137 1,137 933 1,108 (3,172 ) 1,143 Comprehensive (income) loss attributable to noncontrolling interests — — — (6 ) — (6 ) Comprehensive income (loss) attributable to Celanese Corporation 1,137 1,137 933 1,102 (3,172 ) 1,137 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
Schedule of Consolidating Balance Sheets	CELANESE CORPORATION AND SUBSIDIARIES CONSOLIDATING BALANCE SHEET As of December 31, 2018 Parent Guarantor Issuer Subsidiary Guarantors Non- Guarantors Eliminations Consolidated (In $ millions) ASSETS Current Assets Cash and cash equivalents — — 30 409 — 439 Trade receivables - third party and affiliates — — 96 1,040 (119 ) 1,017 Non-trade receivables, net 40 551 797 697 (1,784 ) 301 Inventories, net — — 329 765 (48 ) 1,046 Marketable securities, at fair value — — 31 — — 31 Other assets — 24 10 37 (31 ) 40 Total current assets 40 575 1,293 2,948 (1,982 ) 2,874 Investments in affiliates 3,503 4,820 4,678 855 (12,877 ) 979 Property, plant and equipment, net — — 1,289 2,430 — 3,719 Deferred income taxes — — — 86 (2 ) 84 Other assets — 1,658 142 461 (1,971 ) 290 Goodwill — — 399 658 — 1,057 Intangible assets, net — — 132 178 — 310 Total assets 3,543 7,053 7,933 7,616 (16,832 ) 9,313 LIABILITIES AND EQUITY Current Liabilities Short-term borrowings and current installments of long-term debt - third party and affiliates 544 333 465 258 (1,039 ) 561 Trade payables - third party and affiliates 13 1 342 583 (120 ) 819 Other liabilities 1 87 267 258 (270 ) 343 Income taxes payable — — 475 88 (507 ) 56 Total current liabilities 558 421 1,549 1,187 (1,936 ) 1,779 Noncurrent Liabilities Long-term debt, net of unamortized deferred financing costs — 3,104 1,679 127 (1,940 ) 2,970 Deferred income taxes — 15 85 157 (2 ) 255 Uncertain tax positions — — 6 152 — 158 Benefit obligations — — 250 314 — 564 Other liabilities 1 10 99 138 (40 ) 208 Total noncurrent liabilities 1 3,129 2,119 888 (1,982 ) 4,155 Total Celanese Corporation stockholders' equity 2,984 3,503 4,265 5,146 (12,914 ) 2,984 Noncontrolling interests — — — 395 — 395 Total equity 2,984 3,503 4,265 5,541 (12,914 ) 3,379 Total liabilities and equity 3,543 7,053 7,933 7,616 (16,832 ) 9,313 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 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
Schedule of Consolidating Cash Flow Statements	CELANESE CORPORATION AND SUBSIDIARIES CONSOLIDATING STATEMENT OF CASH FLOWS Year Ended December 31, 2018 Parent Guarantor Issuer Subsidiary Guarantors Non- Guarantors Eliminations Consolidated (In $ millions) Net cash provided by (used in) operating activities 1,085 560 259 833 (1,179 ) 1,558 Investing Activities Capital expenditures on property, plant and equipment — — (225 ) (112 ) — (337 ) Acquisitions, net of cash acquired — — (144 ) — — (144 ) Proceeds from sale of businesses and assets, net — — — 13 — 13 Return of capital from subsidiary — — 233 — (233 ) — Contributions to subsidiary — — (25 ) — 25 — Intercompany loan receipts (disbursements) — (427 ) (66 ) (285 ) 778 — Other, net — — (8 ) (31 ) — (39 ) Net cash provided by (used in) investing activities — (427 ) (235 ) (415 ) 570 (507 ) Financing Activities Short-term borrowings (repayments), net — 61 18 (51 ) (66 ) (38 ) Proceeds from short-term borrowings — — — 51 — 51 Repayments of short-term borrowings — — — (78 ) — (78 ) Proceeds from long-term debt — 846 427 — (712 ) 561 Repayments of long-term debt — (494 ) (26 ) (16 ) — (536 ) Purchases of treasury stock, including related fees (805 ) — — — — (805 ) Dividends to parent — (541 ) (633 ) (5 ) 1,179 — Contributions from parent — — — 25 (25 ) — Stock option exercises — — — — — — Common stock dividends (280 ) — — — — (280 ) Return of capital to parent — — — (233 ) 233 — (Distributions to) contributions from noncontrolling interests — — — (23 ) — (23 ) Other, net — (5 ) (10 ) (2 ) — (17 ) Net cash provided by (used in) financing activities (1,085 ) (133 ) (224 ) (332 ) 609 (1,165 ) Exchange rate effects on cash and cash equivalents — — — (23 ) — (23 ) Net increase (decrease) in cash and cash equivalents — — (200 ) 63 — (137 ) Cash and cash equivalents as of beginning of period — — 230 346 — 576 Cash and cash equivalents as of end of period — — 30 409 — 439 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 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 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 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 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

Description of the Company an_2

Description of the Company and Basis of Presentation (Narrative) (Details)	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Consolidated subsidiaries ownership percentage	100.00%

Summary of Accounting Policie_3

Summary of Accounting Policies (Investments in Affiliates Narrative) (Details)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Subsidiary reporting period lag	one quarter

Summary of Accounting Policie_4

Summary of Accounting Policies (Schedule of Estimated Useful Lives of Depreciable Assets) (Details)	12 Months Ended
	Dec. 31, 2018
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

Summary of Accounting Policie_5

Summary of Accounting Policies (Goodwill and Other Intangible Assets Narrative) (Details)	12 Months Ended
	Dec. 31, 2018
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

Summary of Accounting Policie_6

Summary of Accounting Policies (Insurance Loss Reserves Narrative) (Details)	Dec. 31, 2018
Accounting Policies [Abstract]
Number of wholly-owned insurance companies	2

Summary of Accounting Policie_7

Summary of Accounting Policies (Environmental Liabilities Narrative) (Details)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Environmental liabilities accrual period	15 years

Summary of Accounting Policie_8

Summary of Accounting Policies (Pension and Other Postretirement Obligations) (Details)	Dec. 31, 2018
Accounting Policies [Abstract]
Number of Aa-grade non-callable bonds	300

Summary of Accounting Policie_9

Summary of Accounting Policies Summary of Accounting Policies (Management Compensation Plans Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	Jan. 01, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Sep. 17, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, par value		$ 0.0001	$ 0.0001		$ 0.0001
Vesting period		3 years
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
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
Retained Earnings [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax	$ 1	$ 0	$ (1)	$ 0

Summary of Accounting Polici_10

Summary of Accounting Policies Summary of Accounting Policies (Revenue Recognition) (Details) $ in Millions	Dec. 31, 2018USD ($)
Revenue Recognition [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 791
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue Recognition [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 204
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue Recognition [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 239
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue Recognition [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 148
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year

Accounting Pronouncements (Narr

Accounting Pronouncements (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of sales	$ (5,183)	$ (4,629)	$ (3,984)
Selling, General and Administrative Expense	(546)	(496)	(378)
Research and Development Expense	(72)	(73)	(78)
Other (charges) gains, net	9	(59)	(8)
Operating profit (loss)	1,334	857	934
Non-operating pension and other postretirement employee benefit (expense) income	(62)	44	(41)
Retained earnings	5,847	4,920
Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of sales		(4,625)
Selling, General and Administrative Expense		(456)	(416)
Research and Development Expense		(72)
Other (charges) gains, net		(60)	(11)
Operating profit (loss)		901	893
Non-operating pension and other postretirement employee benefit (expense) income		0	0
Accounting Standards Update 2017-07 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, General and Administrative Expense			38
Other (charges) gains, net			3
Operating profit (loss)			41
Non-operating pension and other postretirement employee benefit (expense) income			$ (41)
Accounting Standards Update 2017-07 [Member] | Restatement Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of sales		(4)
Selling, General and Administrative Expense		(40)
Research and Development Expense		(1)
Other (charges) gains, net		1
Operating profit (loss)		(44)
Non-operating pension and other postretirement employee benefit (expense) income		$ 44
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, liability	225
Operating lease, right-of-use asset	$ 225
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
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings				$ 1

Acquisitions, Dispositions an_3

Acquisitions, Dispositions and Plant Closures (Schedule of Business Acquisitions, by Acquisition) (Details) - USD ($) $ in Millions		Dec. 31, 2018	[1]	Feb. 01, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill		$ 1,057			$ 1,003	$ 796
Omni Plastics [Member]
Business Acquisition [Line Items]
Business acquisition, percentage of voting interests acquired				100.00%
Cash and cash equivalents				$ 2
Trade receivables - third party and affiliates				12
Inventories				13
Property, plant and equipment, net				19
Intangible assets (Note 11)				35
Goodwill	[2]			84
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets				1
Total fair value of assets acquired				166
Trade payables - third party and affiliates				(8)
Total debt (Note 14)				(12)
Total fair value of liabilities assumed				(20)
Net assets acquired				$ 146
Business Combination, Net Earnings as a Percent of Acquirer's Net earnings				1.00%
[1]	There were $0 million of accumulated impairment losses as of December 31, 2018.
[2]	Goodwill consists of expected revenue and operating synergies resulting from the acquisition, all of which is deductible for income tax purposes.

Acquisitions, Dispositions an_4

Acquisitions, Dispositions and Plant Closures Acquisition Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)
Engineered Materials [Member] | Nilit [Member]
Business Acquisition [Line Items]
Goodwill, purchase accounting adjustments	$ 2

Acquisitions, Dispositions an_5

Acquisitions, Dispositions and Plant Closures (Plant Closure Narrative) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring		$ 4	$ 3	$ 8
Loss on disposition of assets, net		5	$ 5	$ (3)
Ocotlán, Mexico
Restructuring Cost and Reserve [Line Items]
Restructuring	[1]	2
Accelerated depreciation expense		15
Loss on disposition of assets, net		1
Other		1
Plant Shutdown Costs		$ 19
[1]	Included in Other (charges) gains, net in the consolidated statement of operations (Note 18).

Ventures and Variable Interes_3

Ventures and Variable Interest Entities (Schedule of Variable Interest Entities) (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Variable Interest Entity [Line Items]
Cash and cash equivalents		$ 439	$ 576	$ 638	$ 967
Trade receivables - third party and affiliates		1,017	986
Property, plant and equipment (net of accumulated depreciation - 2018: $130; 2017: $90)		3,719	3,762
Accumulated depreciation		2,803	2,584
Intangible assets, net		310	301
Accumulated amortization		595	591	$ (524)
Other assets		290	338
Total assets		9,313	9,538
Trade payables		819	807
Current liabilities		1,779	1,559
Deferred income taxes		255	211
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Cash and cash equivalents		24	19
Trade receivables - third party and affiliates		6	5
Property, plant and equipment (net of accumulated depreciation - 2018: $130; 2017: $90)		659	697
Intangible assets, net		23	25
Other assets		5	6
Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Property, plant and equipment (net of accumulated depreciation - 2018: $130; 2017: $90)		42	53
Trade payables		27	25
Current installments of long-term debt		14	18
Long-term debt		57	76
Total liabilities		98	119
Maximum exposure to loss		133	164
Fairway Methanol LLC [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Cash and cash equivalents		24	19
Trade receivables - third party and affiliates		11	9
Property, plant and equipment (net of accumulated depreciation - 2018: $130; 2017: $90)		659	697
Accumulated depreciation		130	90
Intangible assets, net		23	25
Accumulated amortization		3	2
Other assets		5	6
Total assets	[1]	722	756
Trade payables		16	16
Current liabilities	[2]	4	4
Long-term debt		5	5
Deferred income taxes		3	3
Total liabilities		$ 28	$ 28
[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.

Ventures and Variable Interes_4

Ventures and Variable Interest Entities (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Ownership percentage	50.00%

Marketable Securities, at Fai_3

Marketable Securities, at Fair Value (Schedule of Available-for-sale Securities) (Details) - Mutual Funds [Member] - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Amortized cost	$ 31	$ 32
Gross unrealized gain	0	0
Gross unrealized loss	0	0
Fair value	$ 31	$ 32

Receivables, Net Receivables,_2

Receivables, Net Receivables, Net (Schedule of Trade Receivables - Third Party and Affiliates, Net) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Receivables [Abstract]
Trade receivables - third party and affiliates	$ 1,027	$ 995
Allowance for doubtful accounts - third party and affiliates	(10)	(9)
Trade receivables - third party and affiliates, net	$ 1,017	$ 986

Receivables, Net Receivables,_3

Receivables, Net Receivables, Net (Schedule of Non-trade Receivables, Net) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Receivables [Abstract]
Non-income taxes receivable	$ 176	$ 81
Reinsurance receivables	14	16
Income taxes receivable	26	64
Other	85	83
Non-trade receivables, net	$ 301	$ 244

Inventories (Details)

Inventories (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Finished goods	$ 697	$ 591
Work-in-process	70	57
Raw materials and supplies	279	252
Total	$ 1,046	$ 900

Investments in Affiliates (Sche

Investments in Affiliates (Schedule of Equity Method Investments) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Carrying value		$ 815	$ 817
Share of earnings (loss)		233	183	$ 155
Dividends and other distributions		$ (221)	$ (131)	(131)
National Methanol Company (Ibn Sina) [Member] | Engineered Materials [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage		25.00%	25.00%
Carrying value		$ 164	$ 178
Share of earnings (loss)		96	58	38
Dividends and other distributions		$ (112)	$ (1)	(18)
Fortron Industries LLC [Member] | Engineered Materials [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage		50.00%	50.00%
Carrying value		$ 122	$ 111
Share of earnings (loss)		14	17	9
Dividends and other distributions		$ (3)	$ (6)	(9)
Korea Engineering Plastics Co., Ltd. [Member] | Engineered Materials [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage		50.00%	50.00%
Carrying value		$ 150	$ 155
Share of earnings (loss)		29	25	25
Dividends and other distributions		$ (27)	$ (25)	(11)
Polyplastics Co., Ltd. [Member] | Engineered Materials [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage		45.00%	45.00%
Carrying value		$ 196	$ 170
Share of earnings (loss)		64	57	50
Dividends and other distributions		$ (45)	$ (64)	(54)
InfraServ GmbH & Co. Gendorf KG [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage		30.00%
InfraServ GmbH & Co. Gendorf KG [Member] | Other Activities [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage	[1],[2]	30.00%	39.00%
Carrying value	[1],[2]	$ 36	$ 41
Share of earnings (loss)	[1],[2]	7	4	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] | Engineered Materials [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage	[3]	32.00%	32.00%
Carrying value	[3]	$ 129	$ 139
Share of earnings (loss)	[3]	20	19	0
Dividends and other distributions	[3]	$ (25)	$ (26)	0
InfraServ Gmbh & Co. Hoechst KG [Member] | Other Activities [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage	[1],[3]	0.00%	0.00%
Carrying value	[1],[3]	$ 0	$ 0
Share of earnings (loss)	[1],[3]	0	0	22
Dividends and other distributions	[1],[3]	$ 0	$ 0	(30)
InfraServ GmbH & Co. Knapsack KG [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage		22.00%
InfraServ GmbH & Co. Knapsack KG [Member] | Other Activities [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage	[1],[2]	22.00%	27.00%
Carrying value	[1],[2]	$ 16	$ 20
Share of earnings (loss)	[1],[2]	3	2	4
Dividends and other distributions	[1],[2]	$ (4)	$ (4)	(4)
Sherbrooke Capital Health and Wellness, L.P. [Member] | Engineered Materials [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage	[4]	10.00%	10.00%
Carrying value	[4]	$ 2	$ 3
Share of earnings (loss)	[4]	0	1	0
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 18 for further information.
[3]	InfraServ GmbH & Co. Hoechst KG is owned primarily by an entity included in the Company's 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 Acetyl Chain segment also holds 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.

Investments in Affiliates (Sc_2

Investments in Affiliates (Schedule of Summarized Balance Sheet Information for Ibn Sina (National Methanol)) (Details) - National Methanol Company (Ibn Sina) [Member] - USD ($) $ in Millions	Sep. 30, 2018	Sep. 30, 2017
Schedule of summarized balance sheet information for Ibn Sina (National Methanol) [Line Items]
Current assets	$ 448	$ 410
Noncurrent assets	825	833
Current liabilities	200	194
Noncurrent liabilities	$ 450	$ 499

Investments in Affiliates (Sc_3

Investments in Affiliates (Schedule of Summarized Income Statement Information for Ibn Sina (National Methanol)) (Details) - National Methanol Company (Ibn Sina) [Member] - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Schedule of Summarized Income Statement Financial Information for Ibn Sina (National Methanol) [Line Items]
Revenues	$ 913	$ 759	$ 563
Gross profit	396	306	208
Net income	$ 322	$ 256	$ 171

Investments in Affiliates (Sc_4

Investments in Affiliates (Schedule of Equity Securities Without Readily Determinable Fair Value) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule of Investments [Line Items]
Carrying Value	$ 164	$ 159
Dividend income	117	108	$ 108
Other equity securities without readily determinable fair value investee [Member]
Schedule of Investments [Line Items]
Carrying Value	0	1
Dividend income	$ 4	$ 0	0
Acetate Tow [Member] | Kunming Cellulose Fibers Co. Ltd. [Member]
Schedule of Investments [Line Items]
Ownership percentage	30.00%	30.00%
Carrying Value	$ 14	$ 14
Dividend income	$ 12	$ 12	14
Acetate Tow [Member] | Nantong Cellulose Fibers Co. Ltd. [Member]
Schedule of Investments [Line Items]
Ownership percentage	31.00%	31.00%
Carrying Value	$ 115	$ 109
Dividend income	$ 87	$ 81	80
Acetate Tow [Member] | Zhuhai Cellulose Fibers Co. Ltd. [Member]
Schedule of Investments [Line Items]
Ownership percentage	30.00%	30.00%
Carrying Value	$ 30	$ 30
Dividend income	$ 13	$ 14	13
Other Activities [Member] | InfraServ GmbH & Co. Wiesbaden KG [Member]
Schedule of Investments [Line Items]
Ownership percentage	8.00%	8.00%
Carrying Value	$ 5	$ 5
Dividend income	$ 1	$ 1	$ 1

Investments in Affiliates (Sc_5

Investments in Affiliates (Schedule of Transactions with Affiliates) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Purchases	$ 305	$ 250	$ 203
Sales and other credits	117	77	$ 43
Interest expense	$ 1	$ 0

Investments in Affiliates (Sc_6

Investments in Affiliates (Schedule of Balances with Affiliates) (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Non-trade receivables		$ 29	$ 21
Total due from affiliates		29	21
Short-term borrowings	[1]	50	32
Trade payables		46	36
Current Other liabilities		11	8
Total due to affiliates		$ 107	$ 76
[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.

Property, Plant and Equipment_3

Property, Plant and Equipment, Net (Schedule of Property, Plant and Equipment, Net) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Gross asset value	$ 6,522	$ 6,346
Accumulated depreciation	(2,803)	(2,584)
Net book value	3,719	3,762
Land [Member]
Property, Plant and Equipment [Line Items]
Gross asset value	46	47
Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Gross asset value	77	72
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Gross asset value	760	758
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Gross asset value	5,223	5,101
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Gross asset value	$ 416	$ 368

Property, Plant and Equipment_4

Property, Plant and Equipment, Net (Schedule of Assets Under Capital Leases) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Capital Leased Assets [Line Items]
Accumulated depreciation	$ (188)	$ (179)
Net book value	105	131
Buildings [Member]
Capital Leased Assets [Line Items]
Gross capital leased asset value	14	14
Machinery and Equipment [Member]
Capital Leased Assets [Line Items]
Gross capital leased asset value	$ 279	$ 296

Property, Plant and Equipment_5

Property, Plant and Equipment, Net (Schedule of Capitalized Interest and Depreciation Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment, Net [Abstract]
Capitalized interest	$ 10	$ 6	$ 5
Depreciation expense	$ 319	$ 285	$ 281

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets, Net (Schedule of Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018		Dec. 31, 2017
Goodwill
Goodwill, beginning balance	$ 1,003		$ 796
Acquisitions (Note 4)	84		128
Exchange rate changes	(30)		79
Goodwill, ending balance	1,057	[1]	1,003
Accumulated impairment losses	0
Engineered Materials [Member]
Goodwill
Goodwill, beginning balance	643		462
Acquisitions (Note 4)	84		128
Exchange rate changes	(20)		53
Goodwill, ending balance	707	[1]	643
Acetate Tow [Member]
Goodwill
Goodwill, beginning balance	149		148
Acquisitions (Note 4)	0		0
Exchange rate changes	(1)		1
Goodwill, ending balance	148	[1]	149
Acetyl Chain [Member]
Goodwill
Goodwill, beginning balance	211		186
Acquisitions (Note 4)	0		0
Exchange rate changes	(9)		25
Goodwill, ending balance	$ 202	[1]	$ 211
[1]	There were $0 million of accumulated impairment losses as of December 31, 2018.

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets, Net (Schedule of Finite-Lived Intangible Assets, Net) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Finite-Lived intangible Assets Rollforward
Gross asset value		$ 793		$ 777		$ 633
Acquisitions (Note 4)		35	[1]	82	[2]
Renewals		6
Exchange rate changes		(25)		62
Amortization		(24)		(20)		(9)
Exchange rate changes		(20)		(47)
Accumulated amortization		(595)		(591)		524
Net book value		198
Licenses [Member]
Finite-Lived intangible Assets Rollforward
Gross asset value		42		38		36
Acquisitions (Note 4)		0		0
Renewals	[3]	6
Exchange rate changes		(2)		2
Amortization		(2)		(4)
Exchange rate changes		(2)		(2)
Accumulated amortization		(33)		(33)		27
Net book value		$ 9
Finite-lived intangible assets, estimated useful lives		5 years
Customer-Related Intangible Assets [Member]
Finite-Lived intangible Assets Rollforward
Gross asset value		$ 651		640		509
Acquisitions (Note 4)		32		73
Renewals		0
Exchange rate changes		(21)		58
Amortization		(16)		(11)
Exchange rate changes		(17)		(45)
Accumulated amortization		(495)		(496)		440
Net book value		156
Developed Technology [Member]
Finite-Lived intangible Assets Rollforward
Gross asset value		44		45		35
Acquisitions (Note 4)		0		9
Renewals		0
Exchange rate changes		(1)		1
Amortization		(3)		(3)
Exchange rate changes		(1)		(1)
Accumulated amortization		(32)		(30)		26
Net book value		12
Covenants Not to Compete and Other [Member]
Finite-Lived intangible Assets Rollforward
Gross asset value		56		54		53
Acquisitions (Note 4)		3		0
Renewals		0
Exchange rate changes		(1)		1
Amortization		(3)		(2)
Exchange rate changes		0		1
Accumulated amortization		(35)		$ (32)		$ 31
Net book value		$ 21
Nilit [Member]
Finite-Lived intangible Assets Rollforward
Weighted average life of intangible assets acquired				14 years
Omni Plastics [Member]
Finite-Lived intangible Assets Rollforward
Weighted average life of intangible assets acquired		11 years
[1]	Primarily related to intangible assets acquired from Omni Plastics (Note 4) during the year ended December 31, 2018, with a weighted average amortization period of 11 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.
[3]	During the year ended December 31, 2018, the Company extended a research and development technology agreement license, which will be amortized over a period of 5 years.

Goodwill and Intangible Asset_5

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, 2018	Dec. 31, 2017
Gross Asset Value
Gross asset value	$ 115	$ 85
Acquisitions (Note 4)	0	22
Exchange rate changes	3	8
Gross asset value	$ 112	$ 115

Goodwill and Intangible Asset_6

Goodwill and Intangible Assets, Net (Schedule of Estimated Amortization Expense) (Details) $ in Millions	Dec. 31, 2018USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2,019	$ 22
2,020	20
2,021	19
2,022	17
2,023	$ 15

Current Other Liabilities (Deta

Current Other Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Other Liabilities, Current [Abstract]
Asset retirement obligations	$ 3	$ 19
Benefit obligations (Note 15)	30	30
Customer rebates	76	65
Derivatives (Note 22)	7	3
Environmental (Note 16)	20	14
Insurance	4	5
Interest	21	17
Restructuring (Note 18)	4	5
Salaries and benefits	119	113
Sales and use tax/foreign withholding tax payable	22	16
Other	37	67
Total	$ 343	$ 354

Noncurrent Other Liabilities (S

Noncurrent Other Liabilities (Schedule of Noncurrent Other Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Other Liabilities, Noncurrent [Abstract]
Asset retirement obligations	$ 13	$ 7
Deferred proceeds	44	47
Deferred revenue	7	6
Derivatives (Note 22)	11	0
Environmental (Note 16)	49	59
Income taxes payable (Note 19)	0	197
Insurance	37	43
Other	47	54
Total	$ 208	$ 413

Noncurrent Other Liabilities _2

Noncurrent Other Liabilities (Schedule of Changes in Asset Retirement Obligations) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Liabilities, Noncurrent [Roll Forward]
Balance at beginning of year		$ 26	$ 29	$ 36
Additions	[1]	2	0	2
Accretion		0	1	1
Payments		(4)	(5)	(10)
Revisions to cash flow estimates	[2]	(8)	1	0
Balance at end of year		$ 16	$ 26	$ 29
[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.

Noncurrent Other Liabilities _3

Noncurrent Other Liabilities (Schedule of Changes in Asset Retirement Obligations Narrative) (Details) (Details) $ in Millions	Dec. 31, 2017USD ($)
Other Liabilities, Noncurrent [Abstract]
Asset retirement obligation, liability for assets or businesses acquired	$ 10

Debt (Schedule of Short-term De

Debt (Schedule of Short-term Debt) (Details) - USD ($) $ in Millions		Dec. 31, 2018		Dec. 31, 2017
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates
Current installments of long-term debt		$ 367		$ 63
Short-term borrowings, including amounts due to affiliates	[1]	77		86
Total		$ 561		$ 326
Weighted average interest rate, short-term borrowings		3.20%		3.40%
Revolving Credit Facility [Member]
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates
Line of Credit, Current	[3]	$ 40	[2]	$ 97
Weighted average interest rate, short-term borrowings		6.00%		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	[5]	$ 77	[4]	$ 80
Weighted average interest rate, short-term borrowings		3.10%		2.10%
[1]	The weighted average interest rate was 3.2% and 3.4% as of December 31, 2018 and 2017, respectively.
[2]	The Company borrowed $940 million and repaid $997 million under its senior unsecured revolving credit facility during the year ended December 31, 2018.
[3]	The weighted average interest rate was 6.0% and 4.1% as of December 31, 2018 and 2017, respectively.
[4]	The Company borrowed $25 million and repaid $28 million during the year ended December 31, 2018
[5]	The weighted average interest rate was 3.1% and 2.1% as of December 31, 2018 and 2017, respectively.

Debt (Schedule of Long-term Deb

Debt (Schedule of Long-term Debt) (Details) € in Millions, $ in Millions

Dec. 31, 2018USD ($)

Dec. 31, 2017USD ($)

Dec. 31, 2018USD ($)

Nov. 05, 2018EUR (€)

Dec. 11, 2017EUR (€)

Dec. 31, 2016USD ($)

[1]

Sep. 26, 2016EUR (€)

Jul. 15, 2016USD ($)

Dec. 31, 2015USD ($)

Long-Term Debt

Subtotal

$ 3,355

$ 3,398

$ 3,355

Unamortized debt issuance costs

(21)

[1]

(24)

[1]

(21)

[1]

$ (27)

$ (22)

Current installments of long-term debt

(367)

(63)

(367)

Total

2,970

3,315

$ 2,970

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]

0

494

$ 0

Maturity Date

Jul. 15, 2021

Senior Unsecured Notes Due 2019 [Member]

Long-Term Debt

Senior unsecured notes

$ 343

360

$ 343

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

$ 857

897

$ 857

Maturity Date

Sep. 26, 2023

Interest Rate

1.125%

1.125%

Long-term Debt, Gross | €

€ 750

Percentage of Face

99.713%

Senior Unsecured Notes Due 2025 [Member]

Long-Term Debt

Senior unsecured notes

$ 343

359

$ 343

Maturity Date

Dec. 11, 2025

Interest Rate

1.25%

1.25%

Long-term Debt, Gross | €

€ 300

Percentage of Face

99.81%

Senior Unsecured Notes Due 2027 [Member]

Long-Term Debt

Senior unsecured notes

$ 568

0

$ 568

Maturity Date

Mar. 1, 2027

Interest Rate

2.125%

2.125%

Long-term Debt, Gross | €

€ 500

Percentage of Face

99.231%

Pollution control and industrial revenue bonds due at various dates through 2030, interest rates ranging from 4.05% to 5.00% [Member]

Long-Term Debt

Other Long-term debt

$ 167

$ 169

$ 167

Year of maturity, range end

Nov. 1, 2030

Refunding loan for pollution control and industrial revenue bonds [Member]

Long-Term Debt

Year of maturity, range end

Dec. 31, 2030

Nilit bank loans due at various dates through 2026 (Note 4) [Member]

Debt Instrument [Line Items]

Long-term Debt, Weighted Average Interest Rate, at Point in Time

1.30%

1.30%

1.30%

Long-Term Debt

Other Long-term debt

[3]

$ 10

$ 11

$ 10

Year of maturity, range end

Dec. 31, 2026

Obligations Under Capital Leases [Member]

Long-Term Debt

Obligations under capital leases due at various dates through 2054

$ 167

208

$ 167

Year of maturity, range end

Mar. 31, 2054

Long-term Debt [Member]

Long-Term Debt

Unamortized debt issuance costs

[4]

$ (18)

$ (20)

$ (18)

Minimum [Member] | Pollution control and industrial revenue bonds due at various dates through 2030, interest rates ranging from 4.05% to 5.00% [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 due at various dates through 2030, interest rates ranging from 4.05% to 5.00% [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 $3 million, $4 million and $6 million as of December 31, 2018, 2017 and 2016, 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 Celanese credit ratings as of December 31, 2017.

[3]

The weighted average interest rate was 1.3% and 1.3% as of December 31, 2018 and 2017, respectively.

[4]

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

Debt (Senior Credit Facilities

Debt (Senior Credit Facilities Narrative) (Details) - USD ($) $ in Millions		Sep. 26, 2016	Dec. 31, 2018	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			$ 940
Repayments of Lines of Credit		$ 411	$ 997
[1]	The margin for borrowings under the senior unsecured term loan due 2021 was 1.5% above LIBOR at Celanese credit ratings as of December 31, 2017.

Debt (Schedule of Balances Avai

Debt (Schedule of Balances Available for Borrowing) (Details) - USD ($) $ in Millions		Sep. 26, 2016	Dec. 31, 2018		Dec. 31, 2017
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Borrowings outstanding	[2]		$ 40	[1]	$ 97
Letters of credit issued			0
Available for borrowing			960
Revolving Credit Facility [Member] | Senior Unsecured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Proceeds from Lines of Credit			940
Repayments of Lines of Credit		$ 411	$ 997
[1]	The Company borrowed $940 million and repaid $997 million under its senior unsecured revolving credit facility during the year ended December 31, 2018.
[2]	The weighted average interest rate was 6.0% and 4.1% as of December 31, 2018 and 2017, respectively.

Debt Debt (Senior Notes Narrati

Debt Debt (Senior Notes Narrative) (Details) € in Millions, $ in Millions	Nov. 05, 2018USD ($)	Sep. 26, 2016USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	[1]	Nov. 05, 2018EUR (€)	Dec. 11, 2017EUR (€)	Sep. 26, 2016EUR (€)
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage			100.00%
Write off of Deferred Debt Issuance Cost			$ 1	$ 0	$ 3
Senior Unsecured Notes Due 2023 [Member]
Debt Instrument [Line Items]
Senior unsecured notes			$ 857	897
Long-term Debt, Gross | €									€ 750
Percentage of Face									99.713%
Interest Rate			1.125%
Maturity Date			Sep. 26, 2023
Senior Unsecured Notes Due 2019 [Member]
Debt Instrument [Line Items]
Senior unsecured notes			$ 343	360
Interest Rate			3.25%
Maturity Date			Oct. 15, 2019
Senior Unsecured Notes Due 2025 [Member]
Debt Instrument [Line Items]
Senior unsecured notes			$ 343	359
Long-term Debt, Gross | €								€ 300
Percentage of Face								99.81%
Interest Rate			1.25%
Maturity Date			Dec. 11, 2025
Senior Unsecured Notes Due 2027 [Member]
Debt Instrument [Line Items]
Senior unsecured notes			$ 568	$ 0
Long-term Debt, Gross | €							€ 500
Percentage of Face							99.231%
Interest Rate			2.125%
Maturity Date			Mar. 1, 2027
Revolving Credit Facility [Member] | Senior Unsecured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Repayments of Lines of Credit		$ 411	$ 997
Senior Unsecured Term Loan Due 2021 [Member]
Debt Instrument [Line Items]
Repayments of Lines of Credit	$ 463
[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.

Debt Debt (Accounts Receivable

Debt Debt (Accounts Receivable Securitization Facility) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017
Debt Instrument [Line Items]
Cash Flows Between Transferor and Transferee, Proceeds from New Transfers		$ 185
Accounts Receivable Securitization Facility [Member]
Debt Instrument [Line Items]
Line of Credit, Current	[2]	77	[1]	$ 80
Letters of credit issued		29
Available for borrowing		14
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		25
Repayments of Lines of Credit		$ 28
[1]	The Company borrowed $25 million and repaid $28 million during the year ended December 31, 2018
[2]	The weighted average interest rate was 3.1% and 2.1% as of December 31, 2018 and 2017, respectively.
[3]	Outstanding accounts receivable transferred to the SPE was $185 million.

Debt (Schedule of Principle Pay

Debt (Schedule of Principle Payments) (Details) $ in Millions	Dec. 31, 2018USD ($)
Debt Disclosure [Abstract]
2,019	$ 561
2,020	27
2,021	430
2,022	524
2,023	875
Thereafter	1,132
Total	$ 3,549

Debt (Schedule of Net Deferred

Debt (Schedule of Net Deferred Financing Costs) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Debt Instrument [Line Items]
Deferred Finance Costs, Net		$ 24	[1]	$ 27	[1]	$ 22
Financing costs deferred		4	[2]	1	[3]	13	[4]
Accelerated amortization due to refinancing activity		(1)		0		(3)	[5]
Amortization		(6)		(4)		(5)
Deferred Finance Costs, Net	[1]	21		24		27
New Credit Agreement [Member]
Debt Instrument [Line Items]
Financing costs deferred	[4]					5
Senior Unsecured Notes Due 2023 [Member]
Debt Instrument [Line Items]
Financing costs deferred	[4]					6
Refunding loan for pollution control and industrial revenue bonds [Member]
Debt Instrument [Line Items]
Financing costs deferred	[4]					2
Amended Credit Agreement [Member]
Debt Instrument [Line Items]
Accelerated amortization due to refinancing activity	[5]					(2)
Pollution Control and Industrial Revenue Bonds [Member]
Debt Instrument [Line Items]
Accelerated amortization due to refinancing activity	[5]					(1)
Other Noncurrent Assets [Member] | RevolvingCreditandAccountsReceivableSecuritizationFacilities [Member]
Debt Instrument [Line Items]
Deferred Finance Costs, Net	[1]	4		6
Deferred Finance Costs, Net	[1]	$ 3		$ 4		$ 6
[1]	Includes $3 million, $4 million and $6 million as of December 31, 2018, 2017 and 2016, 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 2.125% Notes, which are being amortized through the term of the 2.125% Notes.
[3]	Related to the 1.250% Notes, which are being amortized through the term of the 1.250% Notes.
[4]	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.
[5]	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.

Debt Debt (Other Financing Arra

Debt Debt (Other Financing Arrangements) (Details) $ in Millions	Dec. 31, 2018USD ($)
Other Financing Arrangements [Abstract]
Transfer of Financial Assets Accounted for as Sales, Amount Derecognized	$ 117

Benefit Obligations (Schedule o

Benefit Obligations (Schedule of Contributions to Multiemployer Defined Benefit Pension Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Retirement Benefits [Abstract]
Multiemployer defined benefit plan	$ 8	$ 7	$ 7

Benefit Obligations (Schedule_2

Benefit Obligations (Schedule of Other Postemployment Obligations) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Retirement Benefits [Abstract]
Postemployment benefits	$ 8	$ 8

Benefit Obligations Benefit Obl

Benefit Obligations Benefit Obligations (Schedule of Contributions to Defined Contribution Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Retirement Benefits [Abstract]
Defined contribution plans	$ 40	$ 40	$ 43

Benefit Obligations (Schedule_3

Benefit Obligations (Schedule of Company's Pension and Post Retirement Benefit Plans) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Amounts Recognized in Accumulated Other Comprehensive Income Consist of:
Net amount recognized		$ 0	$ (9)	$ 4
Other comprehensive (income) loss, tax effect		5	6
Pension Plan [Member]
Change in Projected Benefit Obligation
Projected benefit obligation as of beginning of period		3,728	3,610
Service cost		9	9	8
Interest cost		104	107	113
Net actuarial (gain) loss	[1]	(163)	151
Settlements		0	(1)
Benefits paid		(235)	(233)
Curtailments		(1)	0
Special termination benefits		2	1
Exchange rate changes		(32)	69
Other	[2]	0	15
Projected benefit obligation as of end of period		3,412	3,728	3,610
Change in Plan Assets
Fair value of plan assets as of beginning of period		3,251	2,784
Actual return on plan assets		(124)	302
Employer contributions		43	359
Settlements		0	(1)
Benefits paid	[3]	(235)	(233)
Exchange rate changes		(20)	40
Fair value of plan assets as of end of period		2,915	3,251	2,784
Funded status as of end of period		(497)	(477)
Amounts Recognized in the Consolidated Balance Sheets Consist of:
Noncurrent Other assets		30	64
Current Other liabilities		(24)	(24)
Benefit obligations		(503)	(517)
Funded status as of end of period		(497)	(477)
Amounts Recognized in Accumulated Other Comprehensive Income Consist of:
Net actuarial (gain) loss	[4]	8	9
Prior service (benefit) cost		0	(1)
Net amount recognized	[5]	8	8
Other Postretirement Benefits Plan [Member]
Change in Projected Benefit Obligation
Projected benefit obligation as of beginning of period		66	67
Service cost		1	1	0
Interest cost		2	1	2
Net actuarial (gain) loss	[1]	(4)	(2)
Settlements		0	0
Benefits paid		(4)	(4)
Curtailments		0	0
Special termination benefits		0	0
Exchange rate changes		(2)	3
Other	[2]	0	0
Projected benefit obligation as of end of period		59	66	67
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
Settlements		0	0
Benefits paid	[3]	(4)	(4)
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		(59)	(66)
Amounts Recognized in the Consolidated Balance Sheets Consist of:
Noncurrent Other assets		0	0
Current Other liabilities		(5)	(5)
Benefit obligations		(54)	(61)
Funded status as of end of period		(59)	(66)
Amounts Recognized in Accumulated Other Comprehensive Income Consist of:
Net actuarial (gain) loss	[4]	0	0
Prior service (benefit) cost		0	1
Net amount recognized	[5]	0	1
Supplemental Employee Retirement Plan [Member]
Change in Plan Assets
Benefits paid		$ (22)	$ (22)
[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, 2018 and 2017, respectively.
[4]	Relates to the pension plans of the Company's equity method investments.
[5]	Amount shown net of an income tax benefit of $5 million and $6 million as of December 31, 2018 and 2017, respectively, in the consolidated statements of equity (Note 17).

Benefit Obligations (Schedule_4

Benefit Obligations (Schedule of Percentage of US and International Projected Benefit Obligation) (Details)	Dec. 31, 2018	Dec. 31, 2017
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of projected benefit obligation	100.00%	100.00%
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
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	82.00%	83.00%
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of projected benefit obligation	57.00%	54.00%
Foreign Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of projected benefit obligation	18.00%	17.00%
Foreign Plan [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of projected benefit obligation	43.00%	46.00%

Benefit Obligations (Schedule_5

Benefit Obligations (Schedule of Percentage of US and International Fair Value of Plan Assets) (Details)	Dec. 31, 2018	Dec. 31, 2017
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of US and international fair value of plan assets	100.00%	100.00%
Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of US and international fair value of plan assets	88.00%	88.00%
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of US and international fair value of plan assets	12.00%	12.00%

Benefit Obligations (Schedule_6

Benefit Obligations (Schedule of Pension Plans with Projected Benefit Obligations in Excess of Plan Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Retirement Benefits [Abstract]
Projected benefit obligation	$ 840	$ 882
Fair value of plan assets	$ 314	$ 341

Benefit Obligations (Schedule_7

Benefit Obligations (Schedule of Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Retirement Benefits [Abstract]
Accumulated benefit obligation	$ 749	$ 861
Fair value of plan assets	$ 243	$ 338

Benefit Obligations (Schedule_8

Benefit Obligations (Schedule of Accumulated Benefit Obligation for All Defined Benefit Pension Plans) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Retirement Benefits [Abstract]
Accumulated benefit obligation	$ 3,390	$ 3,710

Benefit Obligations (Schedule_9

Benefit Obligations (Schedule of Net Periodic Benefit Costs Recognized) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Actuarial (gain) loss on pension and postretirement plans	$ 165	$ 46	$ 103
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	9	9	8
Interest cost	104	107	113
Expected return on plan assets	(210)	(198)	(177)
Amortization of prior service cost / (credit)	0	0	0
Actuarial (gain) loss on pension and postretirement plans	169	48	101
Curtailment (gain) loss	(1)	0	0
Special termination benefit	2	1	3
Total	73	(33)	48
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	0
Interest cost	2	1	2
Expected return on plan assets	0	0	0
Amortization of prior service cost / (credit)	0	(1)	(3)
Actuarial (gain) loss on pension and postretirement plans	(4)	(2)	2
Curtailment (gain) loss	0	0	0
Special termination benefit	0	0	0
Total	$ (1)	$ (1)	$ 1

Benefit Obligations (Schedul_10

Benefit Obligations (Schedule of Amortization of Accumulated Other Comprehensive Income (Loss), Net Into Net Periodic Benefit Cost) (Details) $ in Millions	Dec. 31, 2018USD ($)
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Prior service cost	$ 0
Prior service cost, total	0
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Prior service cost	0
Prior service cost, total	$ 0

Benefit Obligations (Schedul_11

Benefit Obligations (Schedule of Nonqualified Pension Plans Funded with Nonqualified Trusts) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Noncurrent Other assets, consisting of insurance contracts	$ 37	$ 42
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Noncurrent Other assets, consisting of insurance contracts	37	42
Current Other liabilities	21	22
Benefit obligations	213	237
Supplemental Employee Retirement Plan [Member] | Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Marketable securities, at fair value	$ 31	$ 32

Benefit Obligations (Schedul_12

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, 2018	Dec. 31, 2017	Dec. 31, 2016
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	$ (3)	$ 18	$ 18

Benefit Obligations (Pension an

Benefit Obligations (Pension and Other Postretirement Obligations Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Pension and postretirement net periodic benefit cost	$ (92)	$ (80)	$ (54)
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]
Curtailment gain (loss)	$ 1	$ 0	$ 0
Amortization of prior service cost (credit)	0	0	0
Lump-sum buyout payments	0	1
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain (loss)	0	0	0
Amortization of prior service cost (credit)	0	(1)	(3)
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

Benefit Obligations (Schedul_13

Benefit Obligations (Schedule of Principle Weighted Average Assumptions Used to Determine Benefit Obligations and Benefit Cost) (Details)		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate obligations		3.80%	3.30%
Rate of compensation increase		2.80%	2.80%
Discount rate NPBC		3.30%	3.70%	4.00%
Discount rate NPBC - service cost	[1]	2.20%	2.50%	3.10%
Discount rate NPBC - interest cost	[1]	2.90%	3.10%	3.20%
Expected return on plan assets		6.70%	7.30%	7.30%
Rate of compensation increase NPBC		2.80%	2.80%	2.70%
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate obligations		3.80%	3.20%
Discount rate NPBC		3.20%	3.40%	3.90%
Discount rate NPBC - service cost	[1]	2.90%	2.90%	3.80%
Discount rate NPBC - interest cost	[1]	2.90%	2.90%	3.10%
Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets		6.80%	7.50%	7.50%
Domestic Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate obligations		4.20%	3.50%
Discount rate NPBC		3.50%	3.90%	4.20%
Discount rate NPBC - service cost	[1]	1.90%	1.20%	4.50%
Discount rate NPBC - interest cost	[1]	3.10%	3.30%	3.40%
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate obligations		4.10%	3.40%
Discount rate NPBC		3.40%	3.80%	4.00%
Discount rate NPBC - service cost	[1]	3.70%	4.00%	4.20%
Discount rate NPBC - interest cost	[1]	3.00%	3.10%	3.10%
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase		2.80%	2.80%
Expected return on plan assets		5.90%	5.90%	6.10%
Rate of compensation increase NPBC		2.80%	2.80%	2.70%
Foreign Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate obligations		2.10%	2.10%
Discount rate NPBC		2.10%	2.10%	2.60%
Discount rate NPBC - service cost	[1]	2.30%	2.50%	3.10%
Discount rate NPBC - interest cost	[1]	1.70%	1.70%	2.20%
Foreign Plan [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate obligations		3.40%	3.20%
Discount rate NPBC		3.20%	3.30%	3.60%
Discount rate NPBC - service cost	[1]	3.30%	3.40%	3.80%
Discount rate NPBC - interest cost	[1]	2.90%	2.90%	3.10%
[1]	Beginning in 2016, weighted-average discount rates reflect the adoption of the full yield curve approach.

Benefit Obligations Benefit O_2

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, 2018	Dec. 31, 2017	Dec. 31, 2016
ScheduleofHealthCareCostTrend [Line Items]
Health care cost trend rate assumed for next year	8.50%	9.00%	9.50%
Health care cost trend ultimate rate	5.00%	5.00%	5.00%
Health care cost trend ultimate rate year	2,026	2,026	2,026

Benefit Obligations (Schedul_14

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, 2018USD ($)
Defined Benefit Plan Disclosure [Line Items]
Postretirement obligations, impact of 1% decrease	$ 1.5
Postretirement obligations, impact of 1% increase	1.8
Service and interest cost, impact of 1% decrease	0
Service and interest cost, impact of 1% increase	$ 0

Benefit Obligations (Valuation

Benefit Obligations (Valuation Narrative) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets	6.70%	7.30%	7.30%

Benefit Obligations (Schedul_15

Benefit Obligations (Schedule of Weighted Average Target Asset Allocations) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	(4.10%)
Expected return on plan assets	6.80%	7.50%	7.50%
Weighted average target asset allocations	100.00%
Domestic Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	80.00%
Domestic Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	10.00%
Domestic Plan [Member] | Equity Securities International To Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	10.00%
Domestic Plan [Member] | Other Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average target asset allocations	0.00%
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets	5.90%	5.90%	6.10%
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%

Benefit Obligations (Schedul_16

Benefit Obligations (Schedule of Fair Values of Pension Plan Assets) (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets, fair value non-financial receivables		$ 36	$ 25
Pension plan assets, fair value non-financial payables		19	18
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets	[1]	2,220	2,361
Total liabilities [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(3)	(7)
Swaps [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(3)	(7)
Defined Benefit Plan, Equity Securities, Non-US [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		59	72
Defined Benefit Plan, Cash and Cash Equivalents [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		2	5
Total plan assets [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets	[2]	2,223	2,368
Equities [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		595	727
Swaps [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		3	8
Corporate Debt [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		691	776
Treasuries, Other Debt [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		1,420	1,459
Mortgage Backed Securities [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		8	7
Registered Investment Companies [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		54	60
Short-term Investments [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		29	96
Insurance Contracts [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		35	36
Other [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		5	5
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets	[1]	192	129
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] | Defined Benefit Plan, Equity Securities, Non-US [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		59	72
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		2	5
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]	192	129
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] | 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		127	48
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	4
Significant Other Observable Inputs (Level 2) [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets	[1]	2,028	2,232
Significant Other Observable Inputs (Level 2) [Member] | Total liabilities [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(3)	(7)
Significant Other Observable Inputs (Level 2) [Member] | Swaps [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		(3)	(7)
Significant Other Observable Inputs (Level 2) [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		0	0
Significant Other Observable Inputs (Level 2) [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		0	0
Significant Other Observable Inputs (Level 2) [Member] | Total plan assets [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets	[2]	2,031	2,239
Significant Other Observable Inputs (Level 2) [Member] | Swaps [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		3	8
Significant Other Observable Inputs (Level 2) [Member] | Corporate Debt [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		691	776
Significant Other Observable Inputs (Level 2) [Member] | Treasuries, Other Debt [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		1,293	1,411
Significant Other Observable Inputs (Level 2) [Member] | Mortgage Backed Securities [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		8	7
Significant Other Observable Inputs (Level 2) [Member] | Insurance Contracts [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		35	36
Significant Other Observable Inputs (Level 2) [Member] | Other [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net assets		$ 1	$ 1
[1]	Total net assets excludes non-financial plan receivables and payables of $36 million and $19 million, respectively, as of December 31, 2018 and $25 million and $18 million, respectively, as of December 31, 2017. 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, 2018 excludes investments in common/collective trusts, registered investment companies and short-term investment funds with fair values of $595 million, $54 million and $29 million, respectively. 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.

Benefit Obligations Benefit O_3

Benefit Obligations Benefit Obligations (Schedule of Pension Contributions Expected to be Contributed to the Plans) (Details) $ in Millions	Dec. 31, 2018USD ($)
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 22
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

Benefit Obligations (Schedul_17

Benefit Obligations (Schedule of Pension Benefits Expected to be Paid from the Plans or From the Company's Assets) (Details) $ in Millions	Dec. 31, 2018USD ($)
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
2,019	$ 234	[1]
2,020	232	[1]
2,021	227	[1]
2,022	225	[1]
2,023	224	[1]
2024-2028	1,072	[1]
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
2,019	5	[2]
2,020	4	[2]
2,021	4	[2]
2,022	4	[2]
2,023	4	[2]
2024-2028	$ 18	[2]
[1]	Payments are expected to be made primarily from plan assets.
[2]	Payments are expected to be made primarily from Company assets.

Benefit Obligations (Plan Asset

Benefit Obligations (Plan Assets Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets		6.70%	7.30%	7.30%
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year		$ 22
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		(4.10%)
Expected return on plan assets		6.80%	7.50%	7.50%
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets		5.90%	5.90%	6.10%
Scenario, Forecast [Member] | Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets	6.70%

Environmental (Schedule of Envi

Environmental (Schedule of Environmental Remediation Reserves) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Environmental Remediation Obligations [Abstract]
Demerger obligations (Note 24)	$ 26	$ 28
Divestiture obligations (Note 24)	16	17
Active sites	14	15
US Superfund sites	11	11
Other environmental remediation reserves	2	2
Total	$ 69	$ 73

Environmental (Remediation Narr

Environmental (Remediation Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Spondon, UK, Former Owner [Member] | Consumer Specialties [Member]
Environmental Disclosure [Line Items]
Environmental insurance recoveries receivable	$ 3	$ 3

Environmental (Schedule of En_2

Environmental (Schedule of Environmental Ownership and Liability Percentages) (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Environmental Disclosure [Line Items]
Reserves		$ 69	$ 73
InfraServ GmbH & Co. Gendorf KG [Member]
Environmental Disclosure [Line Items]
Ownership percentage		30.00%
Liability percentage		10.00%
Reserves	[1]	$ 8
InfraServ Gmbh & Co. Hoechst KG [Member]
Environmental Disclosure [Line Items]
Ownership percentage		32.00%
Liability percentage		40.00%
Reserves	[1]	$ 69
InfraServ GmbH & Co. Knapsack KG [Member]
Environmental Disclosure [Line Items]
Ownership percentage		22.00%
Liability percentage		22.00%
Reserves	[1]	$ 1
[1]	Gross reserves maintained by the respective InfraServ entity.

Environmental Environmental (US

Environmental Environmental (US Superfund Sites Narrative) (Details) - Passaic River, New Jersey [Member] $ in Billions	Mar. 03, 2016USD ($)	Dec. 31, 2018
Site Contingency [Line Items]
Number of Parties included in USEPA order		70
EPA Estimated Cost	$ 1.4
Environmental Liability Percentage		1.00%

Stockholders' Equity (Schedule

Stockholders' Equity (Schedule of Dividend Increases) (Details) - $ / shares	1 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2016
Stockholders' Equity Note [Abstract]
Percent increase in common stock dividend	17.00%	28.00%	20.00%
Quarterly Common Stock Cash Dividend	$ 0.54	$ 0.46	$ 0.36
Annual Common Stock Cash Dividend	$ 2.16	$ 1.84	$ 1.44

Stockholders' Equity (Schedul_2

Stockholders' Equity (Schedule of Treasury Stock) (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended				131 Months Ended
		Dec. 31, 2018		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018
Stockholders' Equity Note [Abstract]
Shares reacquired under clawback agreement		1,700
Shares repurchased		7,933,692	[1]	5,436,803	7,034,420	47,712,711
Average purchase price per share		$ 103.01		$ 91.97	$ 71.08	$ 66.08
Amount spent on repurchased shares (in millions)		$ 817		$ 500	$ 500	$ 3,153
Aggregate Board of Directors repurchase authorizations during the period	[2]	0		$ 1,500	$ 0
Share repurchase plan, authorized repurchase amount	[2]	$ 3,866				$ 3,866
[1]	Excludes 1,700 common shares reacquired pursuant to an employee clawback agreement.
[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.

Stockholders' Equity (Schedul_3

Stockholders' Equity (Schedule of Components of Other Comprehensive Income (Loss), Net) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
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	0	(1)	0
Unrealized gain (loss) on marketable securities, net amount	0	(1)	0
Foreign currency translation, gross amount	(65)	162	(22)
Foreign currency translation, income tax (provision) benefit	5	12	11
Foreign currency translation, net amount	(60)	174	(11)
Gain (loss) on cash flow hedges, gross amount	(12)	0	5
Gain (loss) on cash flow hedges, income tax (provision) benefit	2	(1)	0
Gain (loss) on cash flow hedges, net amount	(10)	(1)	5
Pension and postretirement benefits, gross amount	1	7	(5)
Pension and postretirement benefits, income tax (provision) benefit	(1)	2	1
Pension and postretirement benefits, net amount	0	9	(4)
Total other comprehensive income (loss), gross amount	(76)	169	(22)
Total other comprehensive income (loss), income tax (provision) benefit	6	12	12
Total other comprehensive income (loss), net of tax	$ (70)	$ 181	$ (10)

Stockholders' Equity (Schedul_4

Stockholders' Equity (Schedule of Adjustments to Accumulated Other Comprehensive Income (Loss), Net) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of the beginning of the period	$ (177)	$ (358)	$ (348)
Other comprehensive income (loss) before reclassifications	(75)	174	(18)
Amounts reclassified from accumulated other comprehensive income (loss)	(1)	(5)	(4)
Income tax (provision) benefit	6	12	12
Balance as of the end of the period	(247)	(177)	(358)
Unrealized Gain (Loss) on Marketable Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of the beginning of the period	0	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	0	(1)	0
Balance as of the end of the period	0	0	1
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of the beginning of the period	(176)	(350)	(339)
Other comprehensive income (loss) before reclassifications	(65)	162	(22)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0
Income tax (provision) benefit	5	12	11
Balance as of the end of the period	(236)	(176)	(350)
Gain (Loss) from Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of the beginning of the period	2	3	(2)
Other comprehensive income (loss) before reclassifications	(11)	4	7
Amounts reclassified from accumulated other comprehensive income (loss)	(1)	(4)	(2)
Income tax (provision) benefit	2	(1)	0
Balance as of the end of the period	(8)	2	3
Pension and Postretirement Benefits [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of the beginning of the period	(3)	(12)	(8)
Other comprehensive income (loss) before reclassifications	1	8	(3)
Amounts reclassified from accumulated other comprehensive income (loss)	0	(1)	(2)
Income tax (provision) benefit	(1)	2	1
Balance as of the end of the period	$ (3)	$ (3)	$ (12)

Stockholders' Equity (Narrative

Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	Feb. 06, 2019	Dec. 31, 2018	Sep. 17, 2018	Dec. 31, 2017
Equity, Class of Treasury Stock [Line Items]
Common stock, par value		$ 0.0001	$ 0.0001	$ 0.0001
Subsequent Event [Member]
Equity, Class of Treasury Stock [Line Items]
Quarterly cash dividend per share	$ 0.54
Cash dividend	$ 69
Series B common stock, $0.0001 par value, 100,000,000 shares authorized (2017 and 2016: 0 issued and outstanding)
Equity, Class of Treasury Stock [Line Items]
Common stock, par value			$ 0.0001

Other (Charges) Gains, Net (Sch

Other (Charges) Gains, Net (Schedule of Other (Charges) Gains, Net) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Feb. 28, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring (Note 4)		$ (4)	$ (3)	$ (8)
Impairment of equity method investment		0	4	0
Asset impairments		0	0	(2)
Plant/office closures		13	(52)	0
Commercial disputes		0	0	2
Other (charges) gains, net		$ 9	(59)	$ (8)
Acetyl Intermediates [Member]
Restructuring Cost and Reserve [Line Items]
Plant/office closures			(52)
Acetyl Intermediates [Member] | Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Plant/office closures			(22)
Acetyl Intermediates [Member] | Non-income tax receivable adjustment [Member]
Restructuring Cost and Reserve [Line Items]
Plant/office closures			$ (21)
InfraServ GmbH & Co. Knapsack KG [Member]
Restructuring Cost and Reserve [Line Items]
Ownership percentage		22.00%
InfraServ GmbH & Co. Knapsack KG [Member] | Other Activities [Member]
Restructuring Cost and Reserve [Line Items]
Ownership percentage	[1],[2]	22.00%	27.00%
InfraServ GmbH & Co. Gendorf KG [Member]
Restructuring Cost and Reserve [Line Items]
Ownership percentage		30.00%
InfraServ GmbH & Co. Gendorf KG [Member] | Other Activities [Member]
Restructuring Cost and Reserve [Line Items]
Ownership percentage	[1],[2]	30.00%	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
Maximum [Member] | InfraServ GmbH & Co. Knapsack KG [Member]
Restructuring Cost and Reserve [Line Items]
Ownership percentage					27.00%
Maximum [Member] | InfraServ GmbH & Co. Gendorf KG [Member]
Restructuring Cost and Reserve [Line Items]
Ownership percentage					39.00%
Minimum [Member] | InfraServ GmbH & Co. Knapsack KG [Member]
Restructuring Cost and Reserve [Line Items]
Ownership percentage					22.00%
Minimum [Member] | InfraServ GmbH & Co. Gendorf KG [Member]
Restructuring Cost and Reserve [Line Items]
Ownership percentage					30.00%
[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 18 for further information.

Other (Charges) Gains, Net (S_2

Other (Charges) Gains, Net (Schedule of Restructuring Reserves) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Restructuring Reserve [Roll Forward]
Reserve as of the end of the period	$ 4
Total	4
Employee Termination Benefits [Member]
Restructuring Reserve [Roll Forward]
Reserve as of the beginning of the period	3	$ 16
Additions	4	4
Cash payments	(3)	(8)
Other changes	0	9
Exchange rate changes	0	0
Reserve as of the end of the period	4	3
Total	3	16
Plant/Office Closures [Member]
Restructuring Reserve [Roll Forward]
Reserve as of the beginning of the period	2	0
Additions	0	29
Cash payments	(2)	(24)
Other changes	0	(3)
Exchange rate changes	0	0
Reserve as of the end of the period	0	2
Total	2	0
Other [Member]
Restructuring Reserve [Roll Forward]
Reserve as of the end of the period	0
Total	0
Other [Member] | Employee Termination Benefits [Member]
Restructuring Reserve [Roll Forward]
Reserve as of the beginning of the period	1	3
Additions	0	1
Cash payments	(1)	(2)
Other changes	0	1
Exchange rate changes	0	0
Reserve as of the end of the period	0	1
Total	1	3
Other [Member] | Plant/Office Closures [Member]
Restructuring Reserve [Roll Forward]
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
Engineered Materials [Member]
Restructuring Reserve [Roll Forward]
Reserve as of the end of the period	0
Total	0
Engineered Materials [Member] | Employee Termination Benefits [Member]
Restructuring Reserve [Roll Forward]
Reserve as of the beginning of the period	1	2
Additions	0	1
Cash payments	(1)	(2)
Other changes	0	0
Exchange rate changes	0	0
Reserve as of the end of the period	0	1
Total	1	2
Engineered Materials [Member] | Plant/Office Closures [Member]
Restructuring Reserve [Roll Forward]
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
Acetate Tow [Member]
Restructuring Reserve [Roll Forward]
Reserve as of the end of the period	2
Total	2
Acetate Tow [Member] | Employee Termination Benefits [Member]
Restructuring Reserve [Roll Forward]
Reserve as of the beginning of the period	0	8
Additions	2	2
Cash payments	0	(2)
Other changes	0	8
Exchange rate changes	0	0
Reserve as of the end of the period	2	0
Total	0	8
Acetate Tow [Member] | Plant/Office Closures [Member]
Restructuring Reserve [Roll Forward]
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 Chain [Member]
Restructuring Reserve [Roll Forward]
Reserve as of the end of the period	2
Total	2
Acetyl Chain [Member] | Employee Termination Benefits [Member]
Restructuring Reserve [Roll Forward]
Reserve as of the beginning of the period	1	3
Additions	2	0
Cash payments	(1)	(2)
Other changes	0	0
Exchange rate changes	0	0
Reserve as of the end of the period	2	1
Total	1	3
Acetyl Chain [Member] | Plant/Office Closures [Member]
Restructuring Reserve [Roll Forward]
Reserve as of the beginning of the period	2	0
Additions	0	29
Cash payments	(2)	(24)
Other changes	0	(3)
Exchange rate changes	0	0
Reserve as of the end of the period	0	2
Total	$ 2	$ 0

Other (Charges) Gains, Net (Nar

Other (Charges) Gains, Net (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other (Charges) Gains, Net [Line Items]
Commercial disputes	$ 0	$ 0	$ 2
Employee termination benefits	(4)	(3)	(8)
Asset impairments	$ 0	$ 0	(2)
Employee Termination Benefits [Member]
Other (Charges) Gains, Net [Line Items]
Employee termination benefits			$ (8)

Income Taxes (Schedule of Earni

Income Taxes (Schedule of Earnings (Loss) from Continuing Operations Before Tax by Jurisdiction) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
US	$ 480	$ 262	$ 326
International	1,030	813	704
Earnings (loss) from continuing operations before tax	$ 1,510	$ 1,075	$ 1,030

Income Taxes (Schedule of Incom

Income Taxes (Schedule of Income Tax Provision (Benefit)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current
US	$ (184)	$ 201	$ (22)
International	143	158	60
Total	(41)	359	38
Deferred
US	314	(110)	108
International	19	(36)	(24)
Total	333	(146)	84
Income tax provision (benefit)	$ 292	$ 213	$ 122

Income Taxes Income Taxes (Sche

Income Taxes Income Taxes (Schedule of Effective Tax Rate Reconciliation) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income tax provision computed at US federal statutory tax rate	$ 317	$ 376	$ 361
Change in valuation allowance	94	218	(18)
Equity income and dividends	(48)	(87)	(60)
(Income) expense not resulting in tax impact, net	(51)	(157)	(152)
US tax effect of foreign earnings and dividends	25	521	302
Foreign tax credits	(20)	(759)	(293)
Other foreign tax rate differentials	17	(38)	(48)
Legislative changes	(59)	116	4
State income taxes, net of federal benefit	4	12	8
Other, net	13	11	18
Income tax provision (benefit)	$ 292	$ 213	$ 122
Effective income tax rate	19.00%	20.00%	12.00%

Income Taxes (Income Tax Provis

Income Taxes (Income Tax Provision Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Tax Credit Carryforward [Line Items]
Plant Office Closures	$ (13)	$ 52	$ 0
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	1	6	55
Asset impairments	0	0	$ (2)
Tax Credit Carryforward, Amount		240
Tax Credit Carryforward, Valuation Allowance	277
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Transition Tax for Accumulated Foreign Earnings, Provisional Income Tax Expense (Benefit) Net	197
Deferred other tax expense (benefit)	66
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Change in Tax Rate, Deferred Tax Liability, Provisional Income Tax (Expense) Benefit	7	107
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Transition Tax for Accumulated Foreign Earnings, Provisional Income Tax Expense (Benefit)	$ 59
Accumulated but undistributed earnings permanently reinvested in business		$ 3,000
Effective income tax rate	19.00%	20.00%	12.00%
Foreign Tax Authority
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Valuation Allowance		$ 164
Acetyl Intermediates [Member]
Tax Credit Carryforward [Line Items]
Plant Office Closures		$ 52

Income Taxes (Schedule of Conso

Income Taxes (Schedule of Consolidated Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Deferred Tax Assets
Pension and postretirement obligations		$ 138	$ 143
Accrued expenses		61	50
Inventory		13	10
Net operating loss carryforwards		616	703
Tax credit carryforwards	[1]	330	478
Other		195	192
Subtotal		1,353	1,576
Valuation allowance	[2]	(899)	(618)
Total		454	958
Deferred Tax Liabilities
Depreciation and amortization		375	307
Investments in affiliates		203	427
Other		47	69
Total		625	803
Net deferred tax assets (liabilities)		$ (171)
Net deferred tax assets (liabilities)			$ 155
[1]	For the year ended December 31, 2018, the tax credit carryforwards decreased primarily due to the consumption of US foreign tax credits resulting from the deemed repatriation tax required by the TCJA.
[2]	Includes deferred tax asset valuation allowances for the Company's deferred tax assets in the US, Luxembourg, Spain, China, 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.

Income Taxes (Net Operating Los

Income Taxes (Net Operating Loss Carryforwards and Tax Credit Carryforwards Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Amount	$ 301
Tax Credit Carryforward, Valuation Allowance	277
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	$ 33
State [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	73
Valuation allowance offset for State net operating loss carryforwards due to uncertain recoverability	65
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	2,100
Tax Credit Carryforward, Valuation Allowance		$ 164
CHINA
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 450
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, 2019
Maximum [Member] | CHINA
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward expiration	Dec. 31, 2021

Income Taxes (Schedule of Recon

Income Taxes (Schedule of Reconciliation of Unrecognized Tax Benefits Included in Uncertain Tax Positions) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits		$ 119	$ 114	$ 158	$ 162	$ 119	$ 114
As of the beginning of the year		119	114	158
Increases in tax positions for the current year		61	14	9
Increases in tax positions for prior years(1)	[1]	4	4	11
Decreases in tax positions for prior years		(21)	(7)	(9)
Decreases due to settlements		(1)	(6)	(55)
As of the end of the year		162	119	114
Total uncertain tax positions that if recognized would impact the effective tax rate					154	100	87
Total amount of interest expense (benefit) and penalties recognized in the consolidated statements of operations(2)	[2]	1	$ 6	$ (16)
Total amount of interest expense and penalties recognized in the consolidated balance sheets					38	$ 38	$ 26
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, 2018.
[2]	This amount reflects interest on uncertain tax positions and release of certain tax positions as a result of an audit closure that was reflected in the consolidated statements of operations.

Income Taxes (Uncertain Tax Pos

Income Taxes (Uncertain Tax Positions Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Jan. 31, 2018	Dec. 31, 2017
Income Tax Examination [Line Items]
Income Tax Examination, pre-tax adjustments proposed		$ 198	$ 192
Income Tax Examination, Estimate of Possible Loss	$ 136

Management Compensation Plans_2

Management Compensation Plans (Schedule of Total Shares Available for and Subject to Awards) (Details)	Dec. 31, 2018shares
Global Incentive Plan 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Available for Awards	7,256,282
Shares Subject to Outstanding Awards	50,003
Global Incentive Plan 2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Available for Awards	0
Shares Subject to Outstanding Awards	1,995,089

Management Compensation Plans_3

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, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options	$ 7	$ 9	$ 7

Management Compensation Plans_4

Management Compensation Plans (General Plan Description Narrative) (Details)	Apr. 23, 2018shares
Global Incentive Plan 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	2,500,000

Management Compensation Plans_5

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, 2018$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
As of beginning of period, number of units | shares	860
Vested, number of units | shares	(73)
Canceled, number of units | shares	(140)
Forfeited, number of units | shares	(62)
As of end of period, number of units | shares	812
As of beginning of period, weighted average fair value | $ / shares	$ 64.71
Vested, weighted average fair value | $ / shares	53.23
Canceled, weighted average fair value | $ / shares	53.24
Forfeited, weighted average fair value | $ / shares	75.43
As of end of period, weighted average fair value | $ / shares	$ 75.25
2015 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, number of units | shares	227
Granted, weighted average fair value | $ / shares	$ 94.54

Management Compensation Plans_6

Management Compensation Plans (Schedule of Fair Value of Shares Vested for Performance-based RSUs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total	$ 8	$ 42	$ 64

Management Compensation Plans_7

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, 2018$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
As of beginning of period, number of units | shares	351
Granted, number of units | shares	283
Vested, number of units | shares	(201)
Forfeited, number of units | shares	(47)
As of end of period, number of units | shares	386
As of beginning of period, weighted average fair value | $ / shares	$ 75.75
Granted, weighted average fair value | $ / shares	93.62
Vested, weighted average fair value | $ / shares	78.56
Forfeited, weighted average fair value | $ / shares	81.44
As of end of period, weighted average fair value | $ / shares	$ 86.69

Management Compensation Plans_8

Management Compensation Plans (Schedule of Fair Value of Shares Vested for Time-based RSUs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Time Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total	$ 21	$ 12	$ 4

Management Compensation Plans_9

Management Compensation Plans (Schedule of Weighted Average Grant Date Fair Values of Stock Options) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value of RSUs granted	$ 48	$ 59	$ 75

Management Compensation Plan_10

Management Compensation Plans (Restricted Stock Units Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Performance Restricted and Time Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 62
Weighted average term to recognize compensation expense	2 years
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
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

Management Compensation Plans M

Management Compensation Plans Management Compensation Plans (Weighted average grant date fair value of RSUs granted) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value of RSUs granted	$ 48	$ 59	$ 75

Leases (Schedule of Future Mini

Leases (Schedule of Future Minimum Lease Payments for Capital Leases) (Details) $ in Millions	Dec. 31, 2018USD ($)
Leases [Abstract]
2,019	$ 42
2,020	42
2,021	40
2,022	32
2,023	23
Later years	88
Sublease income	0
Minimum lease commitments	267
Less amounts representing interest	(100)
Present value of net minimum lease obligations	$ 167

Leases (Schedule of Future Mi_2

Leases (Schedule of Future Minimum Rental Payments for Operating Leases) (Details) $ in Millions	Dec. 31, 2018USD ($)
Leases [Abstract]
2,019	$ 43
2,020	34
2,021	25
2,022	23
2,023	21
Later years	130
Sublease income	0
Minimum lease commitments	$ 276

Leases (Schedule of Rent Expens

Leases (Schedule of Rent Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Leases [Abstract]
Rent expense recorded under all operating leases	$ 96	$ 91	$ 77

Derivative Financial Instrume_3

Derivative Financial Instruments (Schedule of Interest Rate Swap Derivatives) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Cash Flow Hedging [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Notional Value	$ 400	$ 0

Derivative Financial Instrume_4

Derivative Financial Instruments (Schedule of Notional Amounts of Net Foreign Exchange Exposure by Currency) (Details) - Foreign Exchange Contract [Member] $ in Millions	Dec. 31, 2018USD ($)
Derivative [Line Items]
Total	$ (55)
Brazilian Real [Member]
Derivative [Line Items]
Total	(14)
British Pound Sterling [Member]
Derivative [Line Items]
Total	(84)
Canadian Dollar [Member]
Derivative [Line Items]
Total	33
China, Yuan Renminbi
Derivative [Line Items]
Total	(74)
Euro [Member]
Derivative [Line Items]
Total	106
Hungarian Forint [Member]
Derivative [Line Items]
Total	11
Indonesia, Rupiahs
Derivative [Line Items]
Total	(13)
Korea (South), Won
Derivative [Line Items]
Total	15
Japan, Yen
Derivative [Line Items]
Total	(2)
Mexico, Pesos
Derivative [Line Items]
Total	(68)
Singapore Dollar [Member]
Derivative [Line Items]
Total	41
Swedish Krona [Member]
Derivative [Line Items]
Total	$ (6)

Derivative Financial Instrume_5

Derivative Financial Instruments (Schedule of Notional Amounts of Foreign Currency Derivatives) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Foreign Exchange Contract [Member]
Derivative [Line Items]
Gross notional values of the foreign currency forwards and swaps	$ 1,071	$ 740

Derivative Financial Instrume_6

Derivative Financial Instruments (Schedule of Interest Rate Swap Activity Recorded in the Consolidated Financial Statements) (Details) - Designated as Hedging Instrument [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in Earnings (loss)	$ 1	$ 4	$ 2
Ineffective portion - Other income (expense), net	$ 0	$ 0	$ 0

Derivative Financial Instrume_7

Derivative Financial Instruments (Schedule of Changes in Fair Value of Derivatives) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Gain (loss) recognized in Other comprehensive income (loss)	$ (12)	$ 0	$ 5
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain (loss) recognized in Earnings (loss)	1	4	2
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)	13	2	14
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain (loss) recognized in Other comprehensive income (loss)	(10)	0	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
Interest Expense [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain (loss) recognized in Earnings (loss)	0	0	0
Foreign Currency Gain (Loss) [Member] | Foreign currency forwards and swaps | Derivatives Not Designated as Hedges [Member]
Derivative [Line Items]
Gain (loss) recognized in Earnings (loss)	13	2	14
Cash Flow Hedging [Member]
Derivative [Line Items]
Gain (loss) recognized in Other comprehensive income (loss)	(11)	3	7
Gain (loss) recognized in Earnings (loss)	1	4	2
Cash Flow Hedging [Member] | Commodity Contract [Member]
Derivative [Line Items]
Gain (loss) recognized in Other comprehensive income (loss)	(2)	4	7
Cash Flow Hedging [Member] | Foreign currency forwards and swaps
Derivative [Line Items]
Gain (loss) recognized in Other comprehensive income (loss)	1	(1)	0
Cash Flow Hedging [Member] | Cost of Sales [Member] | Commodity Contract [Member]
Derivative [Line Items]
Gain (loss) recognized in Earnings (loss)	1	5	2
Cash Flow Hedging [Member] | Cost of Sales [Member] | Foreign currency forwards and swaps
Derivative [Line Items]
Gain (loss) recognized in Earnings (loss)	0	(1)	0
Net Investment Hedging [Member] | Foreign currency forwards and swaps
Derivative [Line Items]
Gain (loss) recognized in Other comprehensive income (loss)	0	2	0
Amount of Ineffectiveness on Net Investment Hedges	0	0	0
Foreign Currency Denominated Debt [Member] | Net Investment Hedging [Member]
Derivative [Line Items]
Gain (Loss) On Non-Derivative Used In Net Investment Hedge	51	(119)	61
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	$ 51	$ (117)	$ 61

Derivative Financial Instrume_8

Derivative Financial Instruments (Schedule of Offsetting Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Derivative Asset [Abstract]
Gross amount recognized	$ 11	$ 13
Gross amount offset in the consolidated balance sheets	2	4
Net amount presented in the consolidated balance sheets	9	9
Gross amount not offset in the consolidated balance sheets	3	3
Net amount	$ 6	$ 6

Derivative Financial Instrume_9

Derivative Financial Instruments (Schedule of Offsetting Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Derivative Liability [Abstract]
Gross amount recognized	$ 20	$ 7
Gross amount offset in the consolidated balance sheets	2	4
Net amount presented in the consolidated balance sheets	18	3
Gross amount not offset in the consolidated balance sheets	3	3
Net amount	$ 15	$ 0

Derivative Financial Instrum_10

Derivative Financial Instruments Schedule of Notional Amounts of Net Investment Hedges (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017
Net Investment Hedging [Member] | Foreign Currency Denominated Debt [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of nonderivative instruments	€ 1,550	€ 1,050

Fair Value Measurements (Schedu

Fair Value Measurements (Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	$ 6	$ 6
Derivative liability	(15)	0
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	9	9
Total liabilities	(18)	(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	9
Total liabilities	(18)	(3)
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	8	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	8	5
Other Noncurrent Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Cash Flow Hedge Liability at Fair Value	(10)	0
Other Noncurrent Liabilities [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]
Interest Rate Cash Flow Hedge Liability at Fair Value	0	0
Other Noncurrent Liabilities [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]
Interest Rate Cash Flow Hedge Liability at Fair Value	(10)	0
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	(7)	(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	(7)	(3)
Commodity Contract [Member] | 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	1	2
Commodity Contract [Member] | 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
Commodity Contract [Member] | 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	1	2
Commodity Contract [Member] | 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	0	2
Commodity Contract [Member] | 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
Commodity Contract [Member] | 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	0	2
Commodity Contract [Member] | Other Noncurrent Liabilities [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 liability	(1)	0
Commodity Contract [Member] | Other Noncurrent Liabilities [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 liability	0	0
Commodity Contract [Member] | Other Noncurrent Liabilities [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 liability	$ (1)	$ 0

Fair Value Measurements (Sche_2

Fair Value Measurements (Schedule of Carrying Values and Fair Values of Financial Instruments) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Value	$ 164	$ 159
Equity Securities, FV-NI and without Readily Determinable Fair Value	0	0
Insurance contracts in nonqualified pension trusts, carrying amount	37	42
Insurance contracts in nonqualified pension trusts, fair value	37	42
Long-term debt, including current installments of long-term debt, carrying amount	3,355	3,398
Long-term debt, including current installments of long-term debt, fair value	3,372	3,507
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity Securities, FV-NI and without Readily Determinable Fair Value	0	0
Insurance contracts in nonqualified pension trusts, fair value	37	42
Long-term debt, including current installments of long-term debt, fair value	3,204	3,299
Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity Securities, FV-NI and without Readily Determinable 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	$ 168	$ 208

Commitments and Contingencies (

Commitments and Contingencies (Guarantees - Demerger and Divesture Obligations Narrative) (Details) € in Millions, $ in Millions	12 Months Ended	230 Months Ended
	Dec. 31, 2018USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2018EUR (€)
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 | $		$ 89
Indemnification percentage, other	33.33%	33.33%	33.33%
Divestiture Agreements [Member]
Loss Contingencies [Line Items]
Divestiture obligations range, years	2,037
Guarantee obligations, maximum exposure | $	$ 116	$ 116

Commitments and Contingencies_2

Commitments and Contingencies (Purchase Obligations Narrative) (Details) $ in Billions	12 Months Ended
	Dec. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
Term of unrecorded unconditional purchase obligations	Dec. 31, 2036
Unrecorded unconditional purchase obligations	$ 1.4

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Supplemental Cash Flow Information [Abstract]
Interest paid, net of amounts capitalized	$ 133	$ 130	$ 130
Taxes paid, net of refunds	100	123	129
Noncash Investing and Financing Activities
Accrued treasury stock repurchases	13	0	0
Accrued capital expenditures	(4)	14	1
Asset retirement obligations	(7)	(2)	(2)
Fair value adjustment to securities available for sale, net of tax	$ 0	$ (1)	$ 0

Segment Information (Schedule o

Segment Information (Schedule of Business Segments) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net sales		$ 7,155	$ 6,140	$ 5,389
Other (charges) gains, net		9	(59)	(8)
Operating profit (loss)		1,334	857	934
Equity in net earnings (loss) of affiliates		233	183	155
Depreciation and amortization		343	305	290
Capital expenditures	[1]	333	281	247
Goodwill and intangible assets, net		1,367	1,304
Total assets		9,313	9,538
Increase (decrease) in accrued capital expenditures		(4)	14	1
Acetate Tow [Member]
Segment Reporting Information [Line Items]
Net sales		649
Acetyl Chain [Member]
Segment Reporting Information [Line Items]
Net sales	[2]	3,913
Engineered Materials [Member]
Segment Reporting Information [Line Items]
Net sales		2,593
Operating Segments [Member] | Acetate Tow [Member]
Segment Reporting Information [Line Items]
Net sales	[3]	649	668	821
Other (charges) gains, net		(2)	(2)	(1)
Operating profit (loss)		130	189	276
Equity in net earnings (loss) of affiliates		0	0	0
Depreciation and amortization		58	41	42
Capital expenditures		29	39	36
Goodwill and intangible assets, net		153	154
Total assets		1,032	1,163
Operating Segments [Member] | Acetyl Chain [Member]
Segment Reporting Information [Line Items]
Net sales	[4]	4,042	3,371	3,132
Other (charges) gains, net		11	(52)	(5)
Operating profit (loss)		1,024	509	443
Equity in net earnings (loss) of affiliates		6	6	6
Depreciation and amortization		148	143	141
Capital expenditures		182	150	124
Goodwill and intangible assets, net		240	248
Total assets		3,471	3,518
Operating Segments [Member] | Engineered Materials [Member]
Segment Reporting Information [Line Items]
Net sales		2,593	2,213	1,552
Other (charges) gains, net		0	(2)	(2)
Operating profit (loss)		460	412	377
Equity in net earnings (loss) of affiliates		218	171	125
Depreciation and amortization		126	111	95
Capital expenditures		105	78	75
Goodwill and intangible assets, net		974	902
Total assets		4,012	3,866
Corporate, Non-Segment [Member] | Other Activities [Member]
Segment Reporting Information [Line Items]
Net sales		0	0	0
Other (charges) gains, net		0	(3)	0
Operating profit (loss)		(280)	(253)	(163)
Equity in net earnings (loss) of affiliates		9	6	24
Depreciation and amortization		11	10	12
Capital expenditures		17	14	12
Goodwill and intangible assets, net		0	0
Total assets		798	991
Intersegment [Member]
Segment Reporting Information [Line Items]
Net sales		(129)	(112)	(116)
Other (charges) gains, net		0	0	0
Operating profit (loss)		0	0	1
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] | Acetate Tow [Member]
Segment Reporting Information [Line Items]
Net sales		0	2	0
Intersegment [Member] | Acetyl Chain [Member]
Segment Reporting Information [Line Items]
Net sales		$ 129	$ 110	$ 116
[1]	Includes a decrease in accrued capital expenditures of $4 million for the year ended December 31, 2018 and an increase in accrued capital expenditures of $14 million and $1 million for the years ended December 31, 2017 and 2016, respectively.
[2]	Excludes intersegment sales of $129 million for the year ended December 31, 2018.
[3]	Includes intersegment sales of $0 million, $2 million, and $0 million for the years ended December 31, 2018, 2017 and 2016, respectively.
[4]	Includes intersegment sales of $129 million, $110 million and $116 million for the years ended December 31, 2018, 2017 and 2016, respectively.

Segment Information (Schedule_2

Segment Information (Schedule of Geographical Segments) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 7,155	$ 6,140	$ 5,389
Property, plant and equipment, net	3,719	3,762
BELGIUM
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	261	295	408
Property, plant and equipment, net	54	57
CANADA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	115	92	123
Property, plant and equipment, net	114	128
CHINA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	1,070	833	745
Property, plant and equipment, net	331	363
GERMANY
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	2,335	1,776	1,540
Property, plant and equipment, net	903	979
MEXICO
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	307	257	214
Property, plant and equipment, net	144	162
SINGAPORE
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	997	867	758
Property, plant and equipment, net	83	87
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	1,769	1,572	1,451
Property, plant and equipment, net	1,961	1,857
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	301	448	$ 150
Property, plant and equipment, net	$ 129	$ 129

Revenue Disaggregated Revenue (

Revenue Disaggregated Revenue (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Net sales		$ 7,155	$ 6,140	$ 5,389
Intersegment [Member]
Disaggregation of Revenue [Line Items]
Net sales		(129)	(112)	(116)
Engineered Materials [Member]
Disaggregation of Revenue [Line Items]
Net sales		2,593
Acetate Tow [Member]
Disaggregation of Revenue [Line Items]
Net sales		649
Acetate Tow [Member] | Intersegment [Member]
Disaggregation of Revenue [Line Items]
Net sales		0	2	0
Acetyl Chain [Member]
Disaggregation of Revenue [Line Items]
Net sales	[1]	3,913
Acetyl Chain [Member] | Intersegment [Member]
Disaggregation of Revenue [Line Items]
Net sales		129	$ 110	$ 116
North America [Member] | Engineered Materials [Member]
Disaggregation of Revenue [Line Items]
Net sales		770
North America [Member] | Acetate Tow [Member]
Disaggregation of Revenue [Line Items]
Net sales		133
North America [Member] | Acetyl Chain [Member]
Disaggregation of Revenue [Line Items]
Net sales		1,145
Europe and Africa | Engineered Materials [Member]
Disaggregation of Revenue [Line Items]
Net sales		1,216
Europe and Africa | Acetate Tow [Member]
Disaggregation of Revenue [Line Items]
Net sales		260
Europe and Africa | Acetyl Chain [Member]
Disaggregation of Revenue [Line Items]
Net sales		1,236
Asia Pacific [Member] | Engineered Materials [Member]
Disaggregation of Revenue [Line Items]
Net sales		532
Asia Pacific [Member] | Acetate Tow [Member]
Disaggregation of Revenue [Line Items]
Net sales		217
Asia Pacific [Member] | Acetyl Chain [Member]
Disaggregation of Revenue [Line Items]
Net sales		1,411
South America [Member] | Engineered Materials [Member]
Disaggregation of Revenue [Line Items]
Net sales		75
South America [Member] | Acetate Tow [Member]
Disaggregation of Revenue [Line Items]
Net sales		39
South America [Member] | Acetyl Chain [Member]
Disaggregation of Revenue [Line Items]
Net sales		$ 121
[1]	Excludes intersegment sales of $129 million for the year ended December 31, 2018.

Earnings (Loss) Per Share (Sche

Earnings (Loss) Per Share (Schedule of Earnings (Loss) Per Share) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Amounts attributable to Celanese Corporation
Earnings (loss) from continuing operations		$ 1,212	$ 856	$ 902
Earnings (loss) from discontinued operations		(5)	(13)	(2)
Net earnings (loss) attributable to Celanese Corporation		$ 1,207	$ 843	$ 900
Weighted average shares - basic		134,305,269	137,902,667	144,939,433
Incremental shares attributable to equity awards	[1]	1,111,589	414,728	728,748
Weighted average shares - diluted		135,416,858	138,317,395	145,668,181
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		0	29	836
[1]	Excludes 0, 29 and 836 equity award shares for the years ended December 31, 2018, 2017 and 2016, respectively, as their effect would have been antidilutive.

Consolidating Guarantor Finan_3

Consolidating Guarantor Financial Information (Schedule of Consolidating Statements of Operations) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 7,155	$ 6,140	$ 5,389
Cost of sales	(5,183)	(4,629)	(3,984)
Gross profit	1,972	1,511	1,405
Selling, general and administrative expenses	(546)	(496)	(378)
Amortization of intangible assets	(24)	(20)	(9)
Research and development expenses	(72)	(73)	(78)
Other (charges) gains, net	9	(59)	(8)
Foreign exchange gain (loss), net	0	(1)	(1)
Gain (loss) on disposition of businesses and assets, net	(5)	(5)	3
Operating profit (loss)	1,334	857	934
Equity in net earnings (loss) of affiliates	233	183	155
Non-operating pension and other postretirement employee benefit (expense) income	(62)	44	(41)
Interest expense	(125)	(122)	(120)
Refinancing expense	(1)	0	(6)
Interest income	6	2	2
Dividend income - equity investments	117	108	108
Other income (expense), net	8	3	(2)
Earnings (loss) from continuing operations before tax	1,510	1,075	1,030
Income tax (provision) benefit	(292)	(213)	(122)
Earnings (loss) from continuing operations	1,218	862	908
Earnings (loss) from operation of discontinued operations	(5)	(16)	(3)
Gain (loss) on disposition of discontinued operations	0	0	0
Income tax (provision) benefit from discontinued operations	0	3	1
Earnings (loss) from discontinued operations	(5)	(13)	(2)
Net earnings (loss)	1,213	849	906
Net (earnings) loss attributable to noncontrolling interests	(6)	(6)	(6)
Net earnings (loss) attributable to Celanese Corporation	1,207	843	900
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	1,207	843	898
Non-operating pension and other postretirement employee benefit (expense) income	0	0	0
Interest expense	0	0	0
Refinancing expense	0	0	0
Interest income	0	0	0
Dividend income - equity investments	0	0	0
Other income (expense), net	0	0	0
Earnings (loss) from continuing operations before tax	1,207	843	898
Income tax (provision) benefit	0	0	2
Earnings (loss) from continuing operations	1,207	843	900
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)	1,207	843	900
Net (earnings) loss attributable to noncontrolling interests	0	0	0
Net earnings (loss) attributable to Celanese Corporation	1,207	843	900
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	(3)	0	0
Gain (loss) on disposition of businesses and assets, net	0	0	0
Operating profit (loss)	(3)	0	0
Equity in net earnings (loss) of affiliates	1,202	867	939
Non-operating pension and other postretirement employee benefit (expense) income	0	0	0
Interest expense	(30)	(20)	(16)
Refinancing expense	(1)	0	(4)
Interest income	45	25	12
Dividend income - equity investments	0	0	0
Other income (expense), net	5	(3)	(1)
Earnings (loss) from continuing operations before tax	1,218	869	930
Income tax (provision) benefit	(11)	(26)	(32)
Earnings (loss) from continuing operations	1,207	843	898
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)	1,207	843	898
Net (earnings) loss attributable to noncontrolling interests	0	0	0
Net earnings (loss) attributable to Celanese Corporation	1,207	843	898
Subsidiary Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	2,387	2,240	2,162
Cost of sales	(1,898)	(1,723)	(1,658)
Gross profit	489	517	504
Selling, general and administrative expenses	(213)	(189)	(113)
Amortization of intangible assets	(8)	(4)	(5)
Research and development expenses	(30)	(32)	(32)
Other (charges) gains, net	0	(6)	0
Foreign exchange gain (loss), net	0	0	0
Gain (loss) on disposition of businesses and assets, net	(10)	(8)	(8)
Operating profit (loss)	228	278	346
Equity in net earnings (loss) of affiliates	1,033	591	653
Non-operating pension and other postretirement employee benefit (expense) income	(28)	60	2
Interest expense	(118)	(104)	(94)
Refinancing expense	0	0	(2)
Interest income	7	4	4
Dividend income - equity investments	0	0	0
Other income (expense), net	1	2	1
Earnings (loss) from continuing operations before tax	1,123	831	910
Income tax (provision) benefit	(106)	(62)	(53)
Earnings (loss) from continuing operations	1,017	769	857
Earnings (loss) from operation of discontinued operations	3	(2)	(2)
Gain (loss) on disposition of discontinued operations	0	0	0
Income tax (provision) benefit from discontinued operations	(1)	1	0
Earnings (loss) from discontinued operations	2	(1)	(2)
Net earnings (loss)	1,019	768	855
Net (earnings) loss attributable to noncontrolling interests	0	0	0
Net earnings (loss) attributable to Celanese Corporation	1,019	768	855
Non-Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	5,954	5,013	4,322
Cost of sales	(4,471)	(4,014)	(3,427)
Gross profit	1,483	999	895
Selling, general and administrative expenses	(333)	(307)	(265)
Amortization of intangible assets	(16)	(16)	(4)
Research and development expenses	(42)	(41)	(46)
Other (charges) gains, net	9	(53)	(8)
Foreign exchange gain (loss), net	3	(1)	(1)
Gain (loss) on disposition of businesses and assets, net	5	3	17
Operating profit (loss)	1,109	584	588
Equity in net earnings (loss) of affiliates	220	166	146
Non-operating pension and other postretirement employee benefit (expense) income	(34)	(16)	(43)
Interest expense	(33)	(30)	(29)
Refinancing expense	0	0	0
Interest income	10	5	5
Dividend income - equity investments	113	111	107
Other income (expense), net	3	4	(2)
Earnings (loss) from continuing operations before tax	1,388	824	772
Income tax (provision) benefit	(176)	(125)	(36)
Earnings (loss) from continuing operations	1,212	699	736
Earnings (loss) from operation of discontinued operations	(8)	(14)	(1)
Gain (loss) on disposition of discontinued operations	0	0	0
Income tax (provision) benefit from discontinued operations	1	2	1
Earnings (loss) from discontinued operations	(7)	(12)	0
Net earnings (loss)	1,205	687	736
Net (earnings) loss attributable to noncontrolling interests	(6)	(6)	(6)
Net earnings (loss) attributable to Celanese Corporation	1,199	681	730
Consolidation Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	(1,186)	(1,113)	(1,095)
Cost of sales	1,186	1,108	1,101
Gross profit	0	(5)	6
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	(6)
Operating profit (loss)	0	(5)	0
Equity in net earnings (loss) of affiliates	(3,429)	(2,284)	(2,481)
Non-operating pension and other postretirement employee benefit (expense) income	0	0	0
Interest expense	56	32	19
Refinancing expense	0	0	0
Interest income	(56)	(32)	(19)
Dividend income - equity investments	4	(3)	1
Other income (expense), net	(1)	0	0
Earnings (loss) from continuing operations before tax	(3,426)	(2,292)	(2,480)
Income tax (provision) benefit	1	0	(3)
Earnings (loss) from continuing operations	(3,425)	(2,292)	(2,483)
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)	(3,425)	(2,292)	(2,483)
Net (earnings) loss attributable to noncontrolling interests	0	0	0
Net earnings (loss) attributable to Celanese Corporation	$ (3,425)	$ (2,292)	$ (2,483)

Consolidating Guarantor Finan_4

Consolidating Guarantor Financial Information (Schedule of Consolidating Statements of Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Financial Statements, Captions [Line Items]
Net earnings (loss)	$ 1,213	$ 849	$ 906
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	0	(1)	0
Foreign currency translation	(60)	174	(11)
Gain (loss) on cash flow hedges	(10)	(1)	5
Pension and postretirement benefits	0	9	(4)
Total other comprehensive income (loss), net of tax	(70)	181	(10)
Total comprehensive income (loss), net of tax	1,143	1,030	896
Comprehensive (income) loss attributable to noncontrolling interests	(6)	(6)	(6)
Comprehensive income (loss) attributable to Celanese Corporation	1,137	1,024	890
Parent Guarantor [Member]
Condensed Financial Statements, Captions [Line Items]
Net earnings (loss)	1,207	843	900
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	0	(1)	0
Foreign currency translation	(60)	174	(11)
Gain (loss) on cash flow hedges	(10)	(1)	5
Pension and postretirement benefits	0	9	(4)
Total other comprehensive income (loss), net of tax	(70)	181	(10)
Total comprehensive income (loss), net of tax	1,137	1,024	890
Comprehensive (income) loss attributable to noncontrolling interests	0	0	0
Comprehensive income (loss) attributable to Celanese Corporation	1,137	1,024	890
Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Net earnings (loss)	1,207	843	898
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	0	(1)	0
Foreign currency translation	(60)	174	(11)
Gain (loss) on cash flow hedges	(10)	(1)	5
Pension and postretirement benefits	0	9	(4)
Total other comprehensive income (loss), net of tax	(70)	181	(10)
Total comprehensive income (loss), net of tax	1,137	1,024	888
Comprehensive (income) loss attributable to noncontrolling interests	0	0	0
Comprehensive income (loss) attributable to Celanese Corporation	1,137	1,024	888
Subsidiary Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net earnings (loss)	1,019	768	855
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	6	(1)	0
Foreign currency translation	(90)	226	(65)
Gain (loss) on cash flow hedges	(2)	(1)	5
Pension and postretirement benefits	0	7	(4)
Total other comprehensive income (loss), net of tax	(86)	231	(64)
Total comprehensive income (loss), net of tax	933	999	791
Comprehensive (income) loss attributable to noncontrolling interests	0	0	0
Comprehensive income (loss) attributable to Celanese Corporation	933	999	791
Non-Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net earnings (loss)	1,205	687	736
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	13	(1)	0
Foreign currency translation	(109)	268	(73)
Gain (loss) on cash flow hedges	(1)	(1)	5
Pension and postretirement benefits	0	10	(2)
Total other comprehensive income (loss), net of tax	(97)	276	(70)
Total comprehensive income (loss), net of tax	1,108	963	666
Comprehensive (income) loss attributable to noncontrolling interests	(6)	(6)	(6)
Comprehensive income (loss) attributable to Celanese Corporation	1,102	957	660
Consolidation Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net earnings (loss)	(3,425)	(2,292)	(2,483)
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities	(19)	3	0
Foreign currency translation	259	(668)	149
Gain (loss) on cash flow hedges	13	3	(15)
Pension and postretirement benefits	0	(26)	10
Total other comprehensive income (loss), net of tax	253	(688)	144
Total comprehensive income (loss), net of tax	(3,172)	(2,980)	(2,339)
Comprehensive (income) loss attributable to noncontrolling interests	0	0	0
Comprehensive income (loss) attributable to Celanese Corporation	$ (3,172)	$ (2,980)	$ (2,339)

Consolidating Guarantor Finan_5

Consolidating Guarantor Financial Information (Schedule of Consolidating Balance Sheets) (Details) - USD ($) $ in Millions	Dec. 31, 2018		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current Assets
Cash and cash equivalents	$ 439		$ 576	$ 638	$ 967
Trade receivables - third party and affiliates	1,017		986
Non-trade receivables, net	301		244
Inventories, net	1,046		900
Marketable securities, at fair value	31		32
Other assets	40		54
Total current assets	2,874		2,792
Investments in affiliates	979		976
Property, plant and equipment, net	3,719		3,762
Deferred income taxes	84		366
Other assets	290		338
Goodwill	1,057	[1]	1,003	796
Intangible assets, net	310		301
Total assets	9,313		9,538
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	561		326
Trade payables - third party and affiliates	819		807
Other liabilities	343		354
Income taxes payable	56		72
Total current liabilities	1,779		1,559
Noncurrent Liabilities
Long-term debt, net of unamortized deferred financing costs	2,970		3,315
Deferred income taxes	255		211
Uncertain tax positions	158		156
Benefit obligations	564		585
Other liabilities	208		413
Total noncurrent liabilities	4,155		4,680
Total Celanese Corporation stockholders' equity	2,984		2,887	2,588
Noncontrolling interests	395		412
Total equity	3,379		3,299	3,021
Total liabilities and equity	9,313		9,538
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	40		38
Inventories, net	0		0
Marketable securities, at fair value	0		0
Other assets	0		0
Total current assets	40		38
Investments in affiliates	3,503		2,850
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	3,543		2,888
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	544		0
Trade payables - third party and affiliates	13		0
Other liabilities	1		0
Income taxes payable	0		0
Total current liabilities	558		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	1		0
Total noncurrent liabilities	1		0
Total Celanese Corporation stockholders' equity	2,984		2,888
Noncontrolling interests	0		0
Total equity	2,984		2,888
Total liabilities and equity	3,543		2,888
Issuer [Member]
Current Assets
Cash and cash equivalents	0		0	0	0
Trade receivables - third party and affiliates	0		0
Non-trade receivables, net	551		482
Inventories, net	0		0
Marketable securities, at fair value	0		0
Other assets	24		60
Total current assets	575		542
Investments in affiliates	4,820		4,283
Property, plant and equipment, net	0		0
Deferred income taxes	0		6
Other assets	1,658		1,295
Goodwill	0		0
Intangible assets, net	0		0
Total assets	7,053		6,126
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	333		76
Trade payables - third party and affiliates	1		1
Other liabilities	87		71
Income taxes payable	0		0
Total current liabilities	421		148
Noncurrent Liabilities
Long-term debt, net of unamortized deferred financing costs	3,104		3,128
Deferred income taxes	15		0
Uncertain tax positions	0		0
Benefit obligations	0		0
Other liabilities	10		0
Total noncurrent liabilities	3,129		3,128
Total Celanese Corporation stockholders' equity	3,503		2,850
Noncontrolling interests	0		0
Total equity	3,503		2,850
Total liabilities and equity	7,053		6,126
Subsidiary Guarantors [Member]
Current Assets
Cash and cash equivalents	30		230	51	21
Trade receivables - third party and affiliates	96		89
Non-trade receivables, net	797		279
Inventories, net	329		277
Marketable securities, at fair value	31		32
Other assets	10		12
Total current assets	1,293		919
Investments in affiliates	4,678		3,916
Property, plant and equipment, net	1,289		1,145
Deferred income taxes	0		206
Other assets	142		171
Goodwill	399		314
Intangible assets, net	132		48
Total assets	7,933		6,719
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	465		148
Trade payables - third party and affiliates	342		300
Other liabilities	267		302
Income taxes payable	475		471
Total current liabilities	1,549		1,221
Noncurrent Liabilities
Long-term debt, net of unamortized deferred financing costs	1,679		1,254
Deferred income taxes	85		0
Uncertain tax positions	6		1
Benefit obligations	250		277
Other liabilities	99		255
Total noncurrent liabilities	2,119		1,787
Total Celanese Corporation stockholders' equity	4,265		3,711
Noncontrolling interests	0		0
Total equity	4,265		3,711
Total liabilities and equity	7,933		6,719
Non-Guarantors [Member]
Current Assets
Cash and cash equivalents	409		346	587	946
Trade receivables - third party and affiliates	1,040		988
Non-trade receivables, net	697		385
Inventories, net	765		672
Marketable securities, at fair value	0		0
Other assets	37		93
Total current assets	2,948		2,484
Investments in affiliates	855		861
Property, plant and equipment, net	2,430		2,617
Deferred income taxes	86		158
Other assets	461		165
Goodwill	658		689
Intangible assets, net	178		253
Total assets	7,616		7,227
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	258		369
Trade payables - third party and affiliates	583		598
Other liabilities	258		273
Income taxes payable	88		92
Total current liabilities	1,187		1,332
Noncurrent Liabilities
Long-term debt, net of unamortized deferred financing costs	127		233
Deferred income taxes	157		215
Uncertain tax positions	152		157
Benefit obligations	314		308
Other liabilities	138		158
Total noncurrent liabilities	888		1,071
Total Celanese Corporation stockholders' equity	5,146		4,412
Noncontrolling interests	395		412
Total equity	5,541		4,824
Total liabilities and equity	7,616		7,227
Consolidation Eliminations [Member]
Current Assets
Cash and cash equivalents	0		0	$ 0	$ 0
Trade receivables - third party and affiliates	(119)		(91)
Non-trade receivables, net	(1,784)		(940)
Inventories, net	(48)		(49)
Marketable securities, at fair value	0		0
Other assets	(31)		(111)
Total current assets	(1,982)		(1,191)
Investments in affiliates	(12,877)		(10,934)
Property, plant and equipment, net	0		0
Deferred income taxes	(2)		(4)
Other assets	(1,971)		(1,293)
Goodwill	0		0
Intangible assets, net	0		0
Total assets	(16,832)		(13,422)
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	(1,039)		(267)
Trade payables - third party and affiliates	(120)		(92)
Other liabilities	(270)		(292)
Income taxes payable	(507)		(491)
Total current liabilities	(1,936)		(1,142)
Noncurrent Liabilities
Long-term debt, net of unamortized deferred financing costs	(1,940)		(1,300)
Deferred income taxes	(2)		(4)
Uncertain tax positions	0		(2)
Benefit obligations	0		0
Other liabilities	(40)		0
Total noncurrent liabilities	(1,982)		(1,306)
Total Celanese Corporation stockholders' equity	(12,914)		(10,974)
Noncontrolling interests	0		0
Total equity	(12,914)		(10,974)
Total liabilities and equity	$ (16,832)		$ (13,422)
[1]	There were $0 million of accumulated impairment losses as of December 31, 2018.

Consolidating Guarantor Finan_6

Consolidating Guarantor Financial Information (Schedule of Consolidating Cash Flow Statements) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 1,558	$ 803	$ 893
Investing Activities
Capital expenditures on property, plant and equipment	(337)	(267)	(246)
Acquisitions, net of cash acquired	(144)	(269)	(178)
Proceeds from sale of businesses and assets, net	13	1	12
Return of capital from subsidiary	0	0	0
Contributions to subsidiary	0	0	0
Intercompany loan receipts (disbursements)	0	0	0
Other, net	(39)	(14)	(27)
Net cash provided by (used in) investing activities	(507)	(549)	(439)
Financing Activities
Short-term borrowings (repayments), net	(38)	111	(352)
Proceeds from short-term borrowings	51	182	53
Repayments of short-term borrowings	(78)	(124)	(90)
Proceeds from long-term debt	561	351	1,509
Repayments of long-term debt	(536)	(77)	(1,127)
Purchases of treasury stock, including related fees	(805)	(500)	(500)
Dividends to parent	0	0	0
Contributions from parent	0	0	0
Stock option exercises	0	1	6
Common stock dividends	(280)	(241)	(201)
Return of capital to parent	0	0	0
(Distributions to) contributions from noncontrolling interests	(23)	(27)	(24)
Other, net	(17)	(27)	(33)
Net cash provided by (used in) financing activities	(1,165)	(351)	(759)
Exchange rate effects on cash and cash equivalents	(23)	35	(24)
Net increase (decrease) in cash and cash equivalents	(137)	(62)	(329)
Cash and cash equivalents as of beginning of period	576	638	967
Cash and cash equivalents as of end of period	439	576	638
Parent Guarantor [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	1,085	740	695
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
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	(805)	(500)	(500)
Dividends to parent	0	0	0
Contributions from parent	0	0	0
Stock option exercises	0	1	6
Common stock dividends	(280)	(241)	(201)
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	(1,085)	(740)	(695)
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	560	868	711
Investing Activities
Capital expenditures on property, plant and equipment	0	0	0
Acquisitions, net of cash acquired	0	(11)	0
Proceeds from sale of businesses and assets, net	0	0	0
Return of capital from subsidiary	0	16	145
Contributions to subsidiary	0	0	0
Intercompany loan receipts (disbursements)	(427)	(530)	(283)
Other, net	0	0	0
Net cash provided by (used in) investing activities	(427)	(525)	(138)
Financing Activities
Short-term borrowings (repayments), net	61	56	(371)
Proceeds from short-term borrowings	0	0	0
Repayments of short-term borrowings	0	0	0
Proceeds from long-term debt	846	351	1,589
Repayments of long-term debt	(494)	(6)	(1,083)
Purchases of treasury stock, including related fees	0	0	0
Dividends to parent	541	741	695
Contributions from parent	0	0	0
Stock option exercises	0	0	0
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	(5)	(3)	(13)
Net cash provided by (used in) financing activities	(133)	(343)	(573)
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	259	425	(21)
Investing Activities
Capital expenditures on property, plant and equipment	(225)	(176)	(139)
Acquisitions, net of cash acquired	(144)	(12)	0
Proceeds from sale of businesses and assets, net	0	9	1
Return of capital from subsidiary	233	241	758
Contributions to subsidiary	(25)	0	0
Intercompany loan receipts (disbursements)	(66)	(25)	19
Other, net	(8)	(2)	(10)
Net cash provided by (used in) investing activities	(235)	35	629
Financing Activities
Short-term borrowings (repayments), net	18	15	1
Proceeds from short-term borrowings	0	0	0
Repayments of short-term borrowings	0	0	0
Proceeds from long-term debt	427	530	746
Repayments of long-term debt	(26)	(2)	(635)
Purchases of treasury stock, including related fees	0	0	0
Dividends to parent	633	802	669
Contributions from parent	0	0	0
Stock option exercises	0	0	0
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	(10)	(22)	(21)
Net cash provided by (used in) financing activities	(224)	(281)	(578)
Exchange rate effects on cash and cash equivalents	0	0	0
Net increase (decrease) in cash and cash equivalents	(200)	179	30
Cash and cash equivalents as of beginning of period	230	51	21
Cash and cash equivalents as of end of period	30	230	51
Non-Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	833	593	872
Investing Activities
Capital expenditures on property, plant and equipment	(112)	(91)	(107)
Acquisitions, net of cash acquired	0	(274)	(178)
Proceeds from sale of businesses and assets, net	13	20	11
Return of capital from subsidiary	0	0	0
Contributions to subsidiary	0	0	0
Intercompany loan receipts (disbursements)	(285)	0	90
Other, net	(31)	(12)	(17)
Net cash provided by (used in) investing activities	(415)	(357)	(201)
Financing Activities
Short-term borrowings (repayments), net	(51)	51	(1)
Proceeds from short-term borrowings	51	182	53
Repayments of short-term borrowings	(78)	(124)	(90)
Proceeds from long-term debt	0	14	0
Repayments of long-term debt	(16)	(69)	(42)
Purchases of treasury stock, including related fees	0	0	0
Dividends to parent	5	280	0
Contributions from parent	25	0	0
Stock option exercises	0	0	0
Common stock dividends	0	0	0
Return of capital to parent	(233)	(257)	(903)
(Distributions to) contributions from noncontrolling interests	(23)	(27)	(24)
Other, net	(2)	(2)	1
Net cash provided by (used in) financing activities	(332)	(512)	(1,006)
Exchange rate effects on cash and cash equivalents	(23)	35	(24)
Net increase (decrease) in cash and cash equivalents	63	(241)	(359)
Cash and cash equivalents as of beginning of period	346	587	946
Cash and cash equivalents as of end of period	409	346	587
Consolidation Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(1,179)	(1,823)	(1,364)
Investing Activities
Capital expenditures on property, plant and equipment	0	0	0
Acquisitions, net of cash acquired	0	28	0
Proceeds from sale of businesses and assets, net	0	(28)	0
Return of capital from subsidiary	(233)	(257)	(903)
Contributions to subsidiary	25	0	0
Intercompany loan receipts (disbursements)	778	555	174
Other, net	0	0	0
Net cash provided by (used in) investing activities	570	298	(729)
Financing Activities
Short-term borrowings (repayments), net	(66)	(11)	19
Proceeds from short-term borrowings	0	0	0
Repayments of short-term borrowings	0	0	0
Proceeds from long-term debt	(712)	(544)	(826)
Repayments of long-term debt	0	0	633
Purchases of treasury stock, including related fees	0	0	0
Dividends to parent	(1,179)	(1,823)	(1,364)
Contributions from parent	(25)	0	0
Stock option exercises	0	0	0
Common stock dividends	0	0	0
Return of capital to parent	233	257	903
(Distributions to) contributions from noncontrolling interests	0	0	0
Other, net	0	0	0
Net cash provided by (used in) financing activities	609	1,525	2,093
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

Consolidating Guarantor Finan_7

Consolidating Guarantor Financial Information (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018
Consolidating Guarantor Financial Information [Abstract]
Issuer and subsidiary guarantors, ownership percentage	100.00%

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ in Millions	Jan. 07, 2019	Jan. 02, 2019	Jul. 15, 2016
Next Polymers [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Business acquisition, percentage of voting interests acquired		100.00%
Senior Unsecured Revolving Credit Facility [Member] | Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 1,000
Senior Unsecured Revolving Credit Facility [Member] | Revolving Credit Facility [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,250