Union Carbide 10-K 11 Feb 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Feb. 11, 2019
Document and Entity Information [Abstract]
Entity Registrant Name	UNION CARBIDE CORP /NEW/
Entity Central Index Key	100,790
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-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 Common Stock, Shares Outstanding		935.51
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float	$ 0

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Net trade sales	$ 136	$ 143	$ 108
Net sales to related companies	5,310	5,022	4,811
Total Net Sales	5,446	5,165	4,919
Cost of sales	4,047	4,184	3,724
Research and development expenses	21	19	18
Selling, general and administrative expenses	6	6	7
Asbestos-related charge	0	0	(1,113)
Restructuring and asset related charges - net	(3)	(74)	(4)
Integration and separation costs	3	1	0
Equity in earnings of a nonconsolidated affiliate	0	0	2
Sundry income (expense) - net	(34)	(3)	27
Interest expense and amortization of debt discount	30	28	25
Income Before Income Taxes	1,302	850	57
Provision (Credit) for income taxes	247	645	(32)
Net Income Attributable to Union Carbide Corporation	$ 1,055	$ 205	$ 89

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net Income Attributable to Union Carbide Corporation	$ 1,055	$ 205	$ 89
Other Comprehensive Income (Loss), Net of Tax
Cumulative translation adjustments	2	3	(1)
Pension and other postretirement benefit plans	43	(35)	(91)
Net other comprehensive income	45	(32)	(92)
Comprehensive Income (Loss) Attributable to Union Carbide Corporation	$ 1,100	$ 173	$ (3)

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Current Assets
Cash and cash equivalents	$ 13	$ 13
Accounts receivable:
Trade (net of allowance for doubtful receivables 2018: $-; 2017: $-)	21	21
Related companies	1,029	972
Other	31	50
Income taxes receivable	330	281
Notes receivable from related companies	1,281	1,238
Inventories	304	278
Other current assets	15	35
Total current assets	3,024	2,888
Investments
Investments in related companies	639	639
Other investments	23	25
Noncurrent receivables	67	62
Noncurrent receivables from related companies	54	54
Total investments	783	780
Property
Property	7,430	7,309
Less accumulated depreciation	5,982	5,930
Net property	1,448	1,379
Other Assets
Intangible assets (net of accumulated amortization 2018: $87; 2017: $82)	25	25
Deferred income tax assets	463	511
Deferred charges and other assets	34	36
Total other assets	522	572
Total Assets	5,777	5,619
Current Liabilities
Notes payable to related companies	28	28
Notes payable - other	1	0
Long-term debt due within one year	1	1
Accounts payable:
Trade	247	270
Related companies	515	684
Other	39	22
Income taxes payable	24	24
Asbestos-related liabilities - current	118	132
Accrued and other current liabilities	163	174
Total current liabilities	1,136	1,335
Long-Term Debt	473	474
Other Noncurrent Liabilities
Pension and other postretirement benefits - noncurrent	979	1,054
Asbestos-related liabilities - noncurrent	1,142	1,237
Other noncurrent obligations	132	151
Total other noncurrent liabilities	2,253	2,442
Stockholders' Equity
Common stock (authorized: 1,000 shares of $0.01 par value each; issued: 935.51 shares)	0	0
Additional paid-in capital	138	138
Retained earnings	3,338	2,582
Accumulated other comprehensive loss	(1,561)	(1,352)
Union Carbide Corporation's stockholders' equity	1,915	1,368
Total Liabilities and Equity	$ 5,777	$ 5,619

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Current Assets
Allowance for doubtful accounts	$ 0	$ 0
Other Assets
Accumulated Amortization	$ 87	$ 82
Stockholders' Equity
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000	1,000
Common stock, shares issued (in shares)	935.51	935.51

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Activities
Net Income Attributable to Union Carbide Corporation	$ 1,055	$ 205	$ 89
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	207	200	190
Provision (Credit) for deferred income tax	35	414	(297)
Earnings of nonconsolidated affiliate in excess of dividends received	0	0	(1)
Net gain on sales of property and investments	0	(26)	(51)
Net gain on sale of ownership interest in nonconsolidated affiliate	0	(4)	0
Asbestos-related charge	0	0	1,113
Restructuring and asset related charges - net	3	74	4
Net periodic pension benefit cost	43	28	27
Pension contributions	(42)	(162)	(52)
Other, net	0	0	(1)
Changes in assets and liabilities:
Accounts and notes receivable	23	7	(7)
Related company receivables	(100)	44	132
Inventories	(26)	29	(4)
Accounts payable	(6)	36	18
Related company payables	(169)	166	45
Asbestos-related payments	(109)	(121)	(61)
Other assets and liabilities	(113)	(112)	(457)
Cash provided by operating activities	801	778	687
Investing Activities
Capital expenditures	(250)	(223)	(267)
Proceeds from sale of ownership interest in nonconsolidated affiliate	0	22	0
Changes in noncurrent receivable from related company	0	3	5
Proceeds from sales of property	0	18	60
Purchases of investments	(1)	(1)	(1)
Proceeds from sales of investments	3	9	5
Cash used for investing activities	(248)	(172)	(198)
Financing Activities
Dividends paid to parent	(553)	(603)	(500)
Changes in short-term notes payable	1	0	0
Payments on long-term debt	(1)	(1)	(1)
Cash used for financing activities	(553)	(604)	(501)
Summary
Increase (Decrease) in cash and cash equivalents	0	2	(12)
Cash and cash equivalents at beginning of year	13	11	23
Cash and cash equivalents at end of year	13	13	11
Supplemental Cash Flow Information
Interest, net of amounts capitalized	37	37	38
Income taxes	$ 269	$ 254	$ 697

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accum. Other Comp Loss
Beginning balance at Dec. 31, 2015	$ 2,301	$ 0	$ 138	$ 3,391	$ (1,228)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Union Carbide Corporation	89			89
Other comprehensive income (loss)	(92)				(92)
Dividends declared	(500)			(500)
Ending balance at Dec. 31, 2016	1,798	0	138	2,980	(1,320)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Union Carbide Corporation	205			205
Other comprehensive income (loss)	(32)				(32)
Dividends declared				(603)
Ending balance at Dec. 31, 2017	1,368	0	138	2,582	(1,352)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Union Carbide Corporation	1,055			1,055
Other comprehensive income (loss)	45				45
Dividends declared				(553)
Ending balance at Dec. 31, 2018	1,915	$ 0	$ 138	3,338	(1,561)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of accounting standard (Note 1)	$ 0			$ 254	$ (254)

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Principles of Consolidation and Basis of Presentation Except as otherwise indicated by the context, the terms "Corporation" and "UCC" as used herein mean Union Carbide Corporation and its consolidated subsidiaries. The accompanying consolidated financial statements of the Corporation were prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") and include the assets, liabilities, revenues and expenses of all majority-owned subsidiaries over which the Corporation exercises control and, when applicable, entities for which the Corporation has a controlling financial interest. Investments in nonconsolidated affiliates (20-50 percent owned companies, joint ventures and partnerships) are accounted for using the equity method. The Corporation is a wholly owned subsidiary of The Dow Chemical Company ("Dow"). In accordance with the accounting guidance for earnings per share, the presentation of earnings per share is not required in financial statements of wholly owned subsidiaries. The Corporation’s business activities comprise components of Dow’s global operations rather than stand-alone operations. Dow conducts its worldwide operations through principal product groups. Because there are no separable reportable business segments for UCC under the accounting guidance related to segment reporting and no detailed business information is provided to a chief operating decision maker regarding the Corporation’s stand-alone operations, the Corporation’s results are reported as a single operating segment. Effective August 31, 2017, pursuant to the merger of equals transaction contemplated by the Agreement and Plan of Merger, dated as of December 11, 2015, as amended on March 31, 2017, Dow and E. I. du Pont de Nemours and Company ("DuPont") each merged with subsidiaries of DowDuPont Inc. ("DowDuPont") and, as a result, Dow and DuPont became subsidiaries of DowDuPont (the "Merger"). See Note 3 for additional information. Intercompany transactions and balances are eliminated in consolidation. Transactions with the Corporation’s parent company, Dow, and other subsidiaries of Dow and DowDuPont, have been reflected as related company transactions in the consolidated financial statements. See Note 17 for additional information. Use of Estimates in Financial Statement Preparation The preparation of financial statements in accordance with U.S. GAAP requires the use of estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. The Corporation's consolidated financial statements include amounts that are based on management's best estimates and judgments. Actual results could differ from those estimates. Significant Accounting Policies Asbestos-Related Matters Accruals for asbestos-related matters, including defense and processing costs, are recorded based on an analysis of claim and resolution activity, defense spending and pending and future claims. These accruals are assessed at each balance sheet date to determine if the asbestos-related liability remains appropriate. Accruals for asbestos-related matters are included in the consolidated balance sheets in "Asbestos-related liabilities - current" and "Asbestos-related liabilities - noncurrent." See Note 13 for additional information. Legal Costs The Corporation expenses legal costs as incurred, with the exception of defense and processing costs associated with asbestos-related matters. Foreign Currency Translation While the Corporation's consolidated subsidiaries are primarily based in the United States, the Corporation has small subsidiaries in Asia Pacific and the rest of the world. For those subsidiaries, the local currency has been primarily used as the functional currency. Translation gains and losses of those operations that use local currency as the functional currency are included in the consolidated balance sheets in "Accumulated other comprehensive loss" ("AOCL"). Where the U.S. dollar is used as the functional currency, foreign currency gains and losses are reflected in income. Environmental Matters Accruals for environmental matters are recorded when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated based on current law and existing technologies. These accruals are adjusted periodically as assessment and remediation efforts progress or as additional technical or legal information becomes available. Accruals for environmental liabilities are included in the consolidated balance sheets in "Accrued and other current liabilities" and "Other noncurrent obligations" at undiscounted amounts. Accruals for related insurance or other third-party recoveries for environmental liabilities are recorded when it is probable that a recovery will be realized and are included in the consolidated balance sheets in "Accounts receivable - Other." Environmental costs are capitalized if the costs extend the life of the property, increase its capacity, and/or mitigate or prevent contamination from future operations. Environmental costs are also capitalized in recognition of legal asset retirement obligations resulting from the acquisition, construction and/or normal operation of a long-lived asset. Costs related to environmental contamination treatment and cleanup are charged to expense. Estimated future incremental operations, maintenance and management costs directly related to remediation are accrued when such costs are probable and reasonably estimable. Cash and Cash Equivalents Cash and cash equivalents include time deposits and investments with maturities of three months or less at the time of purchase. Financial Instruments The Corporation calculates the fair value of financial instruments using quoted market prices when available. When quoted market prices are not available for financial instruments, the Corporation uses standard pricing models with market-based inputs that take into account the present value of estimated future cash flows. Inventories Inventories are stated at the lower of cost or net realizable value. The method of determining cost for each subsidiary varies among last-in, first-out ("LIFO"); first-in, first-out ("FIFO"); and average cost, and is used consistently from year to year. The Corporation routinely exchanges and swaps raw materials and finished goods with other companies to reduce delivery time, freight and other transportation costs. These transactions are treated as non-monetary exchanges and are valued at cost. Property Land, buildings and equipment, including property under capital lease agreements, are carried at cost less accumulated depreciation. Depreciation is based on the estimated service lives of depreciable assets and is calculated using the straight-line method. Fully depreciated assets are retained in property and accumulated depreciation accounts until they are removed from service. In the case of disposals, assets and related accumulated depreciation are removed from the accounts, and the net amounts, less proceeds from disposal, are included in income. Impairment and Disposal of Long-Lived Assets The Corporation evaluates long-lived assets and certain identifiable intangible assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. When undiscounted future cash flows are not expected to be sufficient to recover an asset's carrying amount, the asset is written down to its fair value based on bids received from third parties or a discounted cash flow analysis based on market participant assumptions. Long-lived assets to be disposed of by sale, if material, are classified as held for sale and reported at the lower of carrying amount or fair value less cost to sell, and depreciation is ceased. Long-lived assets to be disposed of other than by sale are classified as held and used until they are disposed of and reported at the lower of carrying amount or fair value, and depreciation is recognized over the remaining useful life of the assets. Other Intangible Assets Finite-lived intangible assets such as purchased customer lists, developed technology, patents, trademarks and software, are amortized over their estimated useful lives, generally on a straight-line basis for periods ranging primarily from three to twenty years. Investments in Related Companies Investments in related companies consist of the Corporation's ownership interests in Dow subsidiaries located in North America and Latin America. The Corporation accounts for these investments using the cost method as it does not have significant influence over the operating and financial policies of these related companies. Revenue Effective January 1, 2018, the Corporation recognizes revenue in accordance with Accounting Standards Update ("ASU") 2014-09, "Revenue from Contracts with Customers (Topic 606)," and the associated ASUs (collectively, "Topic 606"). Substantially all of the Corporation's revenues are generated by sales to Dow. Revenue for product sales to related companies is recognized when the related company obtains control of the product, which occurs either at the time that production is complete or shipped free on board ("FOB") from UCC's manufacturing facility, in accordance with the sales agreement between the Corporation and Dow. The Corporation recognizes revenue for product sales to trade customers when its customer obtains control of promised goods or services, in an amount that reflects the consideration which the Corporation expects to receive in exchange for those goods or services. To determine revenue recognition for the arrangements that the Corporation determines are within the scope of Topic 606, the Corporation performs the following five steps: (1) identify the contract(s) with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract, and (5) recognize revenue when (or as) the entity satisfies a performance obligation. See Note 4 for additional information. In periods prior to the adoption of Topic 606, the Corporation's accounting policy for product sales was to recognize revenue as risk and title to the product transfered to the related company or customer. Revenue related to the initial licensing of patents and technology was recognized when earned; revenue related to running royalties was recognized according to licensee production levels. Severance Costs Management routinely reviews its operations around the world in an effort to ensure competitiveness across its operations and geographic regions. When the reviews result in a workforce reduction related to the shutdown of facilities or other optimization activities, severance benefits are provided to employees primarily under ongoing benefit arrangements. These severance costs are accrued once management commits to a plan of termination and it becomes probable that employees will be entitled to benefits at amounts that can be reasonably estimated. Integration and Separation Costs The Corporation classifies expenses related to the Merger as integration and separation costs. Merger-related costs include: costs incurred to prepare for and close the Merger, post-Merger integration expenses and costs incurred to prepare for the separation of Dow’s agriculture business, materials science business and specialty products business. Income Taxes The Corporation accounts for income taxes using the asset and liability method. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences of temporary differences between the carrying amounts and tax bases of assets and liabilities using enacted tax rates. The effect of a change in tax rates on deferred tax assets or liabilities is recognized in income in the period that includes the enactment date. The Corporation uses the portfolio approach for releasing income tax effects from AOCL. The Corporation is included in the same consolidated federal income tax group and consolidated income tax return as Dow. The Corporation accounts for its income taxes following the formula in the Dow-UCC Tax Sharing Agreement used to compute the amount due to Dow or UCC for UCC's share of taxable income and tax attributes on the consolidated income tax return. This method generally follows the separate return method. The amounts reported as income taxes payable or receivable represent the Corporation's payment obligation (or refundable amount) to Dow based on a theoretical tax liability calculated on a separate return method. The Corporation recognizes the financial statement effects of an uncertain income tax position when it is more likely than not, based on the technical merits, that the position will be sustained upon examination. The Corporation accrues for non-income tax contingencies when it is probable that a liability to a taxing authority has been incurred and the amount of the contingency can be reasonably estimated. Provision is made for taxes on undistributed earnings of foreign subsidiaries and related companies to the extent that such earnings are not deemed to be permanently invested. Changes in Financial Statement Presentation Consolidated Statements of Income In the first quarter of 2018, the Corporation adopted ASU 2017-07, "Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost," which required retrospective application for the reclassification of net periodic benefit costs, other than the service cost component, from "Cost of sales" to "Sundry income (expense) - net." See Note 2 for additional information. The following table summarizes the changes made to the consolidated statement of income for the years ended December 31, 2017 and 2016 : Summary of Changes to the Consolidated Statements of Income 2017 2016 In millions As Filed Updated As Filed Updated Cost of sales $ 4,176 $ 4,184 $ 3,713 $ 3,724 Sundry income (expense) - net $ (11 ) $ (3 ) $ 16 $ 27 Consolidated Statements of Equity The adoption of ASU 2018-02 in the second quarter of 2018 resulted in a $254 million increase to retained earnings due to the reclassification from accumulated other comprehensive loss for the effect of the federal corporate income tax rate change as a result of the Tax Cuts and Jobs Act of 2017 ("The Act") on the Corporation's pension plans. This adoption is reflected in the "Adoption of accounting standard" line in the consolidated statements of equity.

RECENT ACCOUNTING GUIDANCE

RECENT ACCOUNTING GUIDANCE	12 Months Ended
	Dec. 31, 2018
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Guidance	RECENT ACCOUNTING GUIDANCE In the fourth quarter of 2018, the Corporation early adopted ASU 2018-14, "Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20): Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans," which, as part of the Financial Accounting Standards Board ("FASB") disclosure framework project, removes disclosures that are no longer considered cost beneficial, clarifies the specific requirements of certain disclosures and adds new disclosure requirements that are considered relevant for employers that sponsor defined benefit pension and/or other postretirement benefit plans. The new standard is effective for fiscal years ending after December 15, 2020, and early adoption is permitted. The new guidance should be applied on a retrospective basis for all periods presented. See Note 15 for updated disclosures for defined benefit pension and other postretirement benefit plans. In the second quarter of 2018, the Corporation early adopted ASU 2018-02, "Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income," which allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from The Act, which was enacted on December 22, 2017, and requires certain disclosures about stranded tax effects. An entity has the option of applying the new guidance at the beginning of the period of adoption or retrospectively to each period (or periods) in which the tax effects related to items remaining in accumulated other comprehensive income are recognized. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, and early adoption is permitted, including adoption in an interim period for reporting periods in which the financial statements have not yet been issued. The Corporation's adoption of the new standard was applied prospectively at the beginning of the second quarter of 2018, with a reclassification of the stranded tax effects as a result of The Act from accumulated other comprehensive loss to retained earnings. See Note 1 for additional information. In the first quarter of 2018, the Corporation adopted ASU 2014-09, "Revenue from Contracts with Customers (Topic 606)," which is the new comprehensive revenue recognition standard that supersedes the revenue recognition requirements in Topic 605, "Revenue Recognition," and most industry specific guidance. The standard's core principle is that a company will recognize revenue when it transfers promised goods or services to a customer in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. In 2015 and 2016, the FASB issued additional ASUs related to Topic 606 that delayed the effective date of the guidance and clarified various aspects of the new revenue guidance, including principal versus agent considerations, identification of performance obligations, and accounting for licenses, and included other improvements and practical expedients. The new guidance was effective for annual and interim periods beginning after December 15, 2017. The Corporation elected to adopt the new guidance using the modified retrospective transition method for all contracts not completed as of the date of adoption, which requires the cumulative effect of applying the new revenue standard as an adjustment to the opening balance of retained earnings in the first period of adoption. As a result of adopting the new guidance, there were no adjustments required to retained earnings at the beginning of the first quarter of 2018 and there was no impact on the consolidated financial statements. The comparative periods have not been restated and continue to be accounted for under Topic 605. See Notes 1 and 4 for additional disclosures regarding the Corporation's contracts with customers as well as the impact of adopting Topic 606. In the first quarter of 2018, the Corporation adopted ASU 2016-16, "Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory," which requires an entity to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. The amendments were effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, and applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings at the beginning of the period of adoption. The adoption of this guidance did not have an impact on the consolidated financial statements. In the first quarter of 2018, the Corporation adopted ASU 2017-07, "Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost," which amends the requirements related to the income statement presentation of the components of net periodic benefit cost for employer sponsored defined benefit pension and other postretirement benefit plans. Under the new guidance, an entity must disaggregate and present the service cost component of net periodic benefit cost in the same income statement line item(s) as other employee compensation costs arising from services rendered during the period, and only the service cost component will be eligible for capitalization. Other components of net periodic benefit cost must be presented separately from the line item(s) that includes the service cost. The new standard was effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. Entities were required to use a retrospective transition method to adopt the requirement for separate income statement presentation of the service cost and other components, and a prospective transition method to adopt the requirement to limit the capitalization of benefit cost to the service component. In the first quarter of 2018, the Corporation used a retrospective transition method to reclassify net periodic benefit cost, other than the service component, from "Cost of sales" to "Sundry income (expense) - net" in the consolidated statements of income. See Note 1 for additional information. Accounting Guidance Issued But Not Adopted at December 31, 2018 In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)," and associated ASUs related to Topic 842, which requires organizations that lease assets to recognize on the balance sheet the assets and liabilities for the rights and obligations created by those leases. The new guidance requires that a lessee recognize assets and liabilities for leases, and recognition, presentation and measurement in the financial statements will depend on its classification as a finance or operating lease. In addition, the new guidance will require disclosures to help investors and other financial statement users better understand the amount, timing and uncertainty of cash flows arising from leases. Lessor accounting remains largely unchanged from current U.S. GAAP but does contain some targeted improvements to align with the new revenue recognition guidance issued in 2014 (Topic 606). The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, and early adoption is permitted. The Corporation has a cross-functional team in place to evaluate and implement the new guidance and the Corporation has substantially completed the implementation of a third-party software solution to facilitate compliance with accounting and reporting requirements. The team continues to review existing lease arrangements and has loaded a significant portion of the lease portfolio into the software. The Corporation continues to enhance accounting systems and update business processes and controls related to the new guidance for leases. Collectively, these activities are expected to facilitate the Corporation's ability to meet the new accounting and disclosure requirements upon adoption in the first quarter of 2019. The ASU allows for multiple methods of adoption. The Corporation will apply the transition requirements at the January 1, 2019, effective date rather than at the beginning of the earliest comparative period presented. This approach allows for a cumulative effect adjustment in the period of adoption, and prior periods will not be restated. The package of practical expedients permitted under the transition guidance will be adopted, which does not require reassessment of whether existing contracts contain a lease or whether classification or unamortized initial lease costs would be different under the new guidance. As an accounting policy election, the Corporation will exclude short-term leases (term of 12 months or less) from the balance sheet presentation and elect to account for non-lease components in a contract as part of the single lease component of all asset classes. The Corporation is finalizing the evaluation of the January 1, 2019, impact and estimates an increase for lease-related assets and liabilities, ranging from $100 million to $140 million in the consolidated balance sheets. The impact to the Corporation's consolidated statements of income and consolidated statements of cash flows is not expected to be material.

MERGER WITH DUPONT

MERGER WITH DUPONT	12 Months Ended
	Dec. 31, 2018
MERGER WITH DUPONT [Abstract]
Merger with DuPont	MERGER WITH DUPONT Effective August 31, 2017, Dow and DuPont completed the merger of equals transaction contemplated by the Agreement and Plan of Merger, dated as of December 11, 2015, as amended on March 31, 2017 (the "Merger Agreement"), by and among Dow, DuPont, DowDuPont, Diamond Merger Sub, Inc. and Orion Merger Sub, Inc. Pursuant to the Merger Agreement, (i) Diamond Merger Sub, Inc. was merged with and into Dow, with Dow surviving the merger as a subsidiary of DowDuPont (the "Diamond Merger") and (ii) Orion Merger Sub, Inc. was merged with and into DuPont, with DuPont surviving the merger as a subsidiary of DowDuPont (the "Orion Merger" and, together with the Diamond Merger, the "Mergers"). Following the consummation of the Mergers, each of Dow and DuPont became subsidiaries of DowDuPont (collectively, the "Merger"). Following the Merger, Dow and DuPont intend to pursue, subject to certain customary conditions, including, among others, the effectiveness of registration statements filed with the U.S. Securities and Exchange Commission ("SEC") and approval by the board of directors of DowDuPont ("DowDuPont Board"), the separation of the combined company's agriculture, materials science and specialty products businesses through one or more tax-efficient transactions ("Intended Business Separations"). On August 31, 2017, following the Diamond Merger, Dow requested that the New York Stock Exchange ("NYSE") withdraw the shares of Dow Common Stock from listing on the NYSE and file a Form 25 with the SEC to report that the shares of Dow Common Stock are no longer listed on the NYSE. The shares of Dow Common Stock were suspended from trading on the NYSE prior to the open of trading on September 1, 2017. In furtherance of the Intended Business Separations, Dow and DuPont are engaged in a series of internal reorganization and realignment steps (the “Internal Reorganization”) to realign their businesses into three subgroups: agriculture, materials science and specialty products. DowDuPont has also formed two wholly owned subsidiaries: Dow Holdings Inc. (“DHI”), to serve as a holding company for its materials science business, and Corteva, Inc. (“Corteva”), to serve as a holding company for its agriculture business. Following the separation and distribution of DHI, which is targeted to occur by April 1, 2019, DowDuPont, as the remaining company, which is referred to herein as “New DuPont,” will continue to hold the agriculture and specialty products businesses. New DuPont is then targeted to complete the separation and distribution of Corteva on June 1, 2019, resulting in New DuPont holding the specialty products businesses of DowDuPont. Following the distributions, DowDuPont will be known as DuPont. As part of the Internal Reorganization, 1) the assets and liabilities of the materials science business will be transferred or conveyed to legal entities that then will be aligned under DHI, 2) the assets and liabilities of the agriculture business will be transferred or conveyed to legal entities that then will be aligned under Corteva, and 3) the assets and liabilities of the specialty products business will be transferred or conveyed to legal entities that then will be aligned with New DuPont. Following the Internal Reorganization, DowDuPont expects to separately distribute DHI and Corteva through separate, pro rata U.S. federal tax-free spin-offs in which DowDuPont stockholders, at such time, would receive shares of common stock of DHI and of Corteva. It is expected that a portion of UCC's assets and liabilities aligned with the specialty products business will be transferred to and aligned with New DuPont as part of the Internal Reorganization. The Corporation does not expect the Internal Reorganization to have a material impact on the consolidated financial statements.

REVENUE

REVENUE	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue	REVENUE Substantially all of the Corporation's revenues are generated by intercompany sales to Dow. Products are sold to and purchased from Dow at market-based prices in accordance with the terms of Dow’s intercompany pricing policies. Approximately 99 percent of the Corporation's sales in 2018 , 2017 and 2016 related to sales of product; the remaining sales related to the licensing of patents and technology. The Corporation sells its products to Dow to simplify the customer interface process. Substantially all product sale contracts are short-term in nature and have original expected durations of one year or less. Revenue from product sales is recognized when Dow or the customer obtains control of the Corporation’s product, which occurs at a point in time, typically at the time production is complete or product is shipped FOB from UCC’s manufacturing facility for sales to Dow, or upon shipment for sales to trade customers. The Corporation’s payment terms are on average 40 to 60 days after invoicing. All shipping and handling activities that occur after control transfers to the customer are considered fulfillment activities. Certain long-term contracts include a series of distinct goods that are delivered continuously to the customer through a pipeline. For these types of product sales, the Corporation invoices the customer in an amount that directly corresponds with the value to the customer of the Corporation’s performance to date. As a result, revenue is recognized based on the amount billable to the customer in accordance with the right to invoice practical expedient. The transaction price for product sales includes estimates for the most likely amount of consideration to which the Corporation will be entitled based on historical award experience and the Corporation’s best judgment at the time. Taxes collected and remitted to governmental authorities are excluded from the transaction price. For contracts with multiple performance obligations, the Corporation allocates the transaction price to each performance obligation on the basis of relative standalone selling price, which is based on the price charged to customers or estimated using the expected cost plus margin method. Revenue related to the initial licensing of patents and technology is recognized when the performance obligation is satisfied. Revenue related to sales-based royalties to which the Corporation expects to be entitled is estimated based on historical sales. The Corporation’s contract liabilities include payments received in advance of performance under long-term contracts for product sales and royalties, and are realized when the associated revenue is recognized under the contract with remaining contract terms that range up to 22 years. The Corporation will have rights to future consideration for revenue recognized when product is delivered to the customer. The balance of contract liabilities at December 31, 2018 was $41 million ( $43 million at December 31, 2017 ) and was included in "Accrued and other current liabilities" and "Other noncurrent obligations" in the consolidated balance sheets. The Corporation disaggregates its revenue from contracts with customers by type of customer (sales to related parties and sales to trade customers) as presented on the consolidated statements of income and believes this disaggregation best depicts the nature, amount, timing and uncertainty of its revenue and cash flows. Substantially all of the product sales are made to the parent entity, Dow, and there are no unique economic factors that affect revenue recognition and cash flows associated with these product sales.

RESTRUCTURING AND ASSET RELATED

RESTRUCTURING AND ASSET RELATED CHARGES - NET	12 Months Ended
	Dec. 31, 2018
Restructuring and Related Activities [Abstract]
Restructuring and Asset Related Charges - Net	RESTRUCTURING AND ASSET RELATED CHARGES - NET 2017 Restructuring and Asset Related Charges In September 2017, the Corporation approved restructuring actions that are aligned with DowDuPont's synergy plans. As a result of these actions, the Corporation recorded a pretax restructuring charge for severance and related benefit costs of $8 million in the third quarter of 2017. In November 2017, the Corporation approved additional restructuring actions in connection with the restructuring program. A pretax restructuring charge for severance and related benefit costs of $2 million was recorded in the fourth quarter of 2017, as well as charges of $62 million for the write-off and write-down of manufacturing and facility assets at multiple UCC sites, including a steam unit in Institute, West Virginia. The impact of these charges was shown as "Restructuring and asset related charges - net" in the consolidated statements of income. At December 31, 2017, severance of $2 million had been paid, leaving a liability of $8 million . In addition to actions taken in 2017, the Corporation recorded pretax charges of $3 million in 2018 for additional restructuring charges for severance and related benefit costs. At December 31, 2018 , severance of $9 million had been paid, leaving a liability of $4 million . The impact of this charge was shown as “Restructuring and asset related charges - net” in the consolidated statements of income. These actions are expected to be substantially completed by the end of 2019. 2016 Restructuring On June 27, 2016, the Corporation approved actions to further improve cost effectiveness with additional workforce reductions. As a result of these actions, the Corporation recorded a pretax restructuring charge in the second quarter of 2016 consisting of severance and related benefit costs of $1 million for the separation of approximately 5 positions. In the fourth quarter of 2016, the Corporation recorded an additional charge of $2 million related to the separation of an additional 16 positions, and in the second quarter of 2017, an additional charge of $2 million was recorded to adjust the charge for severance and related benefit costs. The impact of these charges was shown as "Restructuring and asset related charges - net" in the consolidated statements of income. At December 31, 2017, the liability for severance and related benefit costs was zero , substantially completing the 2016 restructuring program. The Corporation expects to incur additional costs in the future related to restructuring activities, as UCC continually looks for ways to enhance the efficiency and cost effectiveness of its operations. Future costs are expected to include demolition costs related to the closed facilities; these will be recognized as incurred. The Corporation also expects to incur additional employee-related costs, including involuntary termination benefits, related to its other optimization activities. These costs cannot be reasonably estimated at this time.

SUPPLEMENTARY INFORMATION

SUPPLEMENTARY INFORMATION	12 Months Ended
	Dec. 31, 2018
Supplementary Information [Abstract]
Supplementary Information	SUPPLEMENTARY INFORMATION Sundry Income (Expense) - Net In millions 2018 2017 2016 Dow administrative and overhead fees 1 $ (30 ) $ (33 ) $ (27 ) Net commission expense - related company 1 (22 ) (22 ) (22 ) Net gain on sales of property — 23 50 Interest income 28 20 14 Non-operating pension and other postretirement benefit plan net credits (costs) 2 (1 ) 8 11 Net gain on sale of a nonconsolidated affiliate — 4 — Foreign exchange gain — — 1 Other - net (9 ) (3 ) — Total sundry income (expense) - net $ (34 ) $ (3 ) $ 27 1. See Note 17 for additional information. 2. Presented in accordance with ASU 2017-07. See Notes 1 , 2 and 15 for additional information. Accrued and Other Current Liabilities "Accrued and other current liabilities" in the consolidated balance sheets were $163 million at December 31, 2018 , and $174 million at December 31, 2017 . The current portion of the Corporation's accrued obligations for environmental matters, which is a component of "Accrued and other current liabilities," was $58 million at December 31, 2018 , and $67 million at December 31, 2017 (see Note 13 for additional information). No other component of "Accrued and other current liabilities" was more than 5 percent of total current liabilities.

INCOME TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES On December 22, 2017, The Act was enacted. The Act reduces the U.S. federal corporate income tax rate from 35 percent to 21 percent, requires companies to pay a one-time transition tax on earnings of certain foreign subsidiaries that were previously deferred, creates new provisions related to foreign sourced earnings, eliminates the domestic manufacturing deduction and moves to a hybrid territorial system. At December 31, 2017, the Corporation had not completed its accounting for the tax effects of The Act; however, the Corporation made a reasonable estimate of the effects on its existing deferred tax balances and the one-time transition tax. In accordance with Staff Accounting Bulletin 118 ("SAB 118"), income tax effects of The Act were refined upon obtaining, preparing and analyzing additional information during the measurement period. At December 31, 2018, the Corporation had completed its accounting for the tax effects of The Act. • As a result of The Act, the Corporation remeasured its U.S. federal deferred tax assets and liabilities based on the income tax rates at which they are expected to reverse in the future, which is generally 21 percent. The Corporation recorded a cumulative charge of $248 million ( $2 million benefit in 2018 and $250 million charge in 2017 ) to "Provision (Credit) for income taxes" in the consolidated statements of income with respect to the remeasurement of the Corporation's deferred tax balances. • The Act requires a mandatory deemed repatriation of post-1986 undistributed foreign earnings and profits ("E&P"), which results in a one-time transition tax. As a result, the cumulative provisional amount recorded for the transition tax liability for the Corporation's foreign subsidiaries was insignificant at December 31, 2018. • The Corporation recorded an indirect impact of The Act related to prepaid tax on intercompany sales of inventory. The amount related to the inventory was $2 million , recorded as a charge to "Provision (Credit) for income taxes" for the period ended December 31, 2018 . • For tax years beginning after December 31, 2017, The Act introduced new provisions for U.S. taxation of certain global intangible low-taxed income ("GILTI"). The Corporation has made the policy election to record any liability associated with GILTI in the period in which it is incurred. Geographic Allocation of Income and Provision (Credit) for Income Taxes In millions 2018 2017 2016 Income (Loss) before income taxes Domestic $ 1,305 $ 856 $ 49 Foreign (3 ) (6 ) 8 Income before income taxes $ 1,302 $ 850 $ 57 Current tax expense (benefit) Federal $ 166 $ 226 $ 265 State and local 6 2 (3 ) Foreign 40 3 3 Total current tax expense $ 212 $ 231 $ 265 Deferred tax expense (benefit) Federal 1 $ 27 $ 392 $ (285 ) State and local 8 22 (12 ) Total deferred tax expense (benefit) $ 35 $ 414 $ (297 ) Provision (Credit) for income taxes $ 247 $ 645 $ (32 ) Net income $ 1,055 $ 205 $ 89 1. 2018 and 2017 includes the impact of The Act; 2016 includes the impact of the asbestos-related charge. Reconciliation to U.S. Statutory Rate 2018 2017 2016 Statutory U.S. federal income tax rate 21.0 % 35.0 % 35.0 % U.S. manufacturing deductions — — (14.0 ) Unrecognized tax benefits (0.3 ) (0.4 ) (45.6 ) Foreign Derived Intangible Income ("FDII") deduction (2.2 ) — — Federal tax accrual adjustments (0.3 ) (1.1 ) (12.3 ) Impact of U.S. tax reform (0.2 ) 29.4 — Deferred intercompany gain — 11.4 — State and local tax impact 1.0 2.2 (24.6 ) Other - net — (0.6 ) 5.4 Effective Tax Rate 1 19.0 % 75.9 % (56.1 )% 1. The tax rate for 2018 was favorably impacted by The Act and the FDII deduction. The tax rate for 2017 was unfavorably impacted by The Act and the recognition of a deferred gain. The tax rate for 2016 was favorably impacted by the release of a reserve in excess of the settlement of an uncertain tax position and from the asbestos-related charge. A transaction for the sale of stock between the Corporation and Dow in 2014 created a gain that was initially deferred for tax purposes. This deferred gain became taxable as a result of activities executed in anticipation of the intended separation of DowDuPont into three publicly traded companies. As a result, in the third quarter of 2017, the Corporation increased “Income taxes payable” in the consolidated balance sheets and recorded a charge to "Provision (Credit) for income taxes" in the consolidated statements of income of $97 million . Deferred Tax Balances at Dec 31 2018 2017 In millions Assets Liabilities Assets Liabilities Property $ — $ 129 $ — $ 132 Tax loss and credit carryforwards 42 — 47 — Postretirement benefit obligations 234 — 251 — Other accruals and reserves 326 8 349 1 Inventory 8 — 8 — Other - net 11 2 9 1 Subtotal $ 621 $ 139 $ 664 $ 134 Valuation allowances 1 (19 ) — (19 ) — Total $ 602 $ 139 $ 645 $ 134 1. Primarily related to the realization of recorded tax benefits on state tax loss carryforwards from operations in the United States. Operating Loss and Tax Credit Carryforwards 2018 2017 In millions Asset Asset Operating loss carryforwards Expire within 5 years $ 31 $ 29 Expire after 5 years or indefinite expiration 5 12 Total operating loss carryforwards $ 36 $ 41 Tax credit carryforwards Expire within 5 years $ — $ 1 Expire after 5 years or indefinite expiration 6 5 Total tax credit carryforwards $ 6 $ 6 Undistributed earnings of foreign subsidiaries and related companies that are deemed to be permanently invested amounted to $35 million at December 31, 2018 and $9 million at December 31, 2017 . The unrecognized deferred tax liability on those earnings is not material. The following table provides a reconciliation of the Corporation's unrecognized tax benefits: Total Gross Unrecognized Tax Benefits In millions 2018 2017 2016 Total unrecognized tax benefits at Jan 1 $ 1 $ 1 $ 68 Increases related to positions taken on items from prior years — — 139 Settlement of uncertain tax positions with tax authorities — — (206 ) Total unrecognized tax benefits at Dec 31 $ 1 $ 1 $ 1 Total unrecognized tax benefits that, if recognized, would impact the effective tax rate $ 1 $ 1 $ 1 Total amount of interest and penalties (benefit) recognized in "Provision (Credit) for income taxes" $ (5 ) $ (6 ) $ (36 ) In the fourth quarter of 2016, a settlement in the amount of $206 million was reached for a tax matter regarding a historical change in the legal ownership structure of a nonconsolidated affiliate. As a result of the settlement, the Corporation recorded a net decrease to uncertain tax positions of $67 million in "Other noncurrent obligations" in the consolidated balance sheets. In the first quarter of 2018, a settlement was reached for a tax matter regarding fees paid to the Corporation by a foreign nonconsolidated affiliate. As a result, the Corporation recorded an increase of $40 million to "Income taxes receivable" and "Income taxes payable" in the consolidated balance sheets. There was no impact to the consolidated statements of income. In the second quarter of 2018, a payment of $40 million was made for the settlement of the tax matter. The Corporation is included in Dow's consolidated federal income tax group and DowDuPont's consolidated tax return. Current and deferred tax expenses are calculated for the Corporation as a stand-alone group and are allocated to the group from the consolidated totals, consistent with the Dow-UCC Tax Sharing Agreement. The Corporation is currently under examination in a number of tax jurisdictions, including the U.S. federal and various state jurisdictions. It is reasonably possible that these examinations may be resolved in the next twelve months. The impact on the Corporation’s results of operations is not expected to be material. Tax years that remain subject to examination for the Corporation's major tax jurisdictions are shown below: Tax Years Subject to Examination by Major Tax Jurisdiction at Dec 31, 2018 Earliest Open Year Jurisdiction United States: Federal income tax 2004 State and local income tax 2004 Inherent uncertainties exist in estimates of tax contingencies due to changes in tax law, both legislated and concluded through the various jurisdictions' tax court systems. It is the opinion of the Corporation's management that the possibility is remote that costs in excess of those accrued will have a material impact on the Corporation's consolidated financial statements.

INVENTORIES

INVENTORIES	12 Months Ended
	Dec. 31, 2018
Inventory Disclosure [Abstract]
Inventories	INVENTORIES The following table provides a breakdown of inventories: Inventories at Dec 31 In millions 2018 2017 Finished goods $ 264 $ 222 Work in process 45 47 Raw materials 45 48 Supplies 85 73 Total $ 439 $ 390 Adjustment of inventories to a LIFO basis (135 ) (112 ) Total inventories $ 304 $ 278 Inventories valued on a LIFO basis, principally U.S. chemicals and plastics product inventories, represented 60 percent of the total inventories at December 31, 2018 , and 70 percent of the total inventories at December 31, 2017 .

PROPERTY

PROPERTY	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Property	PROPERTY The following table provides a breakdown of property: Property at Dec 31 Estimated Useful Lives (Years) In millions 2018 2017 Land and land improvements 0-25 $ 285 $ 283 Buildings 5-50 412 402 Machinery and equipment 3-20 6,205 6,049 Other property 3-30 338 325 Construction in progress — 190 250 Total property $ 7,430 $ 7,309 The following table provides information regarding depreciation expense and capitalized interest: In millions 2018 2017 2016 Depreciation expense $ 179 $ 176 $ 166 Capitalized interest $ 7 $ 10 $ 13

INVESTMENTS IN RELATED COMPANIE

INVESTMENTS IN RELATED COMPANIES	12 Months Ended
	Dec. 31, 2018
Investments in Related Companies [Abstract]
Investments in Related Companies	INVESTMENTS IN RELATED COMPANIES The Corporation's ownership interests in related companies at December 31, 2018 and 2017 were as follows: Investments in Related Companies at Dec 31 Ownership Interest Investment Balance In millions 2018 2017 2018 2017 Dow International Holdings Company 12 % 12 % $ 633 $ 633 Dow Quimica Mexicana S.A. de C.V. 15 % 15 % 5 5 Other — % — % 1 1 Total Investments in Related Companies $ 639 $ 639

INTANGIBLE ASSETS

INTANGIBLE ASSETS	12 Months Ended
	Dec. 31, 2018
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Intangible Assets	INTANGIBLE ASSETS The following table provides information regarding the Corporation's intangible assets: Intangible Assets at Dec 31 2018 2017 In millions Gross Carrying Amount Accum Amort Net Gross Carrying Amount Accum Amort Net Intangible assets with finite lives: Licenses and developed technology $ 33 $ (33 ) $ — $ 33 $ (33 ) $ — Software 79 (54 ) 25 74 (49 ) 25 Total intangible assets $ 112 $ (87 ) $ 25 $ 107 $ (82 ) $ 25 The following table provides information regarding amortization expense: Amortization Expense In millions 2018 2017 2016 Software 1 $ 6 $ 5 $ 4 1. Included in “Cost of sales” in the consolidated statements of income. Total estimated amortization expense for the next five fiscal years is as follows: Estimated Amortization Expense for Next Five Years In millions 2019 $ 7 2020 $ 7 2021 $ 5 2022 $ 4 2023 $ 2

NOTES PAYABLE AND LONG-TERM DEB

NOTES PAYABLE AND LONG-TERM DEBT	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Notes Payable and Long-term Debt	NOTES PAYABLE AND LONG-TERM DEBT Notes Payable at Dec 31 In millions 2018 2017 Notes payable to banks and other lenders $ 1 $ — Notes payable to related companies 28 28 Total notes payable $ 29 $ 28 Year-end average interest rates 3.27 % 2.56 % Long-Term Debt at Dec 31 2018 Average Rate 2018 2017 Average Rate 2017 In millions Promissory notes and debentures: Debentures due 2023 7.875 % $ 175 7.875 % $ 175 Debentures due 2025 6.79 % 12 6.79 % 12 Debentures due 2025 7.50 % 150 7.50 % 150 Debentures due 2096 7.75 % 135 7.75 % 135 Capital lease obligations 7 8 Unamortized debt discount and issuance costs (5 ) (5 ) Long-term debt due within one year (1 ) (1 ) Total long-term debt $ 473 $ 474 Maturities of Long-Term Debt for Next Five Years at Dec 31, 2018 In millions 2019 $ 1 2020 $ 1 2021 $ 1 2022 $ 1 2023 $ 176 Debt Covenants and Default Provisions The Corporation's outstanding public debt has been issued under indentures which contain, among other provisions, covenants that the Corporation must comply with while the underlying notes are outstanding. Such covenants are typically based on the Corporation's size and financial position and include, subject to the exceptions and qualifications contained in the indentures, obligations not to (i) allow liens on principal U.S. manufacturing facilities, (ii) enter into sale and lease-back transactions with respect to principal U.S. manufacturing facilities, or (iii) merge into or consolidate with any other entity or sell or convey all or substantially all of its assets. Failure of the Corporation to comply with any of these covenants could, after the passage of any applicable grace period, result in a default under the applicable indenture which would allow the note holders to accelerate the due date of the outstanding principal and accrued interest on the subject notes.

COMMITMENTS AND CONTINGENT LIAB

COMMITMENTS AND CONTINGENT LIABILITIES	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	COMMITMENTS AND CONTINGENT LIABILITIES Environmental Matters Accruals for environmental matters are recorded when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated, based on current law and existing technologies. At December 31, 2018 , the Corporation had accrued obligations of $94 million for probable environmental remediation and restoration costs, including $16 million for the remediation of Superfund sites. These obligations were included in "Accrued and other current liabilities" and "Other noncurrent obligations" in the consolidated balance sheets. This is management's best estimate of the costs for remediation and restoration with respect to environmental matters for which the Corporation has accrued liabilities, although it is reasonably possible that the ultimate cost with respect to these particular matters could range up to approximately three and a half times that amount. Consequently, it is reasonably possible that environmental remediation and restoration costs in excess of amounts accrued could have a material impact on the Corporation's results of operations, financial condition and cash flows. It is the opinion of the Corporation's management that the possibility is remote that costs in excess of the range disclosed will have a material impact on the Corporation's results of operations, financial condition and cash flows. Inherent uncertainties exist in these estimates primarily due to unknown environmental conditions, changing governmental regulations and legal standards regarding liability, and emerging remediation technologies for handling site remediation and restoration. At December 31, 2017 , the Corporation had accrued obligations of $114 million for probable environmental remediation and restoration costs, including $19 million for the remediation of Superfund sites. In the fourth quarter of 2016, the Corporation recorded an adjustment to the environmental accrual, primarily resulting from the culmination of negotiations with regulators and/or final stages of certain remediation projects. These charges were included in "Cost of sales" in the consolidated statements of income. The following table summarizes the activity in the Corporation's accrued obligations for environmental matters for the years ended December 31, 2018 and 2017 : Accrued Liability for Environmental Matters In millions 2018 2017 Balance at Jan 1 $ 114 $ 145 Accrual adjustment 38 36 Payments against reserve (57 ) (68 ) Foreign currency impact (1 ) 1 Balance at Dec 31 $ 94 $ 114 The amounts charged to income on a pretax basis related to environmental remediation totaled $38 million in 2018 , $36 million in 2017 and $122 million in 2016 . Capital expenditures for environmental protection were $9 million in 2018 , $9 million in 2017 and $10 million in 2016 . Litigation The Corporation is involved in a number of legal proceedings and claims with both private and governmental parties. These cover a wide range of matters, including, but not limited to: product liability; trade regulation; governmental regulatory proceedings; health, safety and environmental matters; employment; patents; contracts; taxes; and commercial disputes. Asbestos-Related Matters Introduction The Corporation is and has been involved in a large number of asbestos-related suits filed primarily in state courts during the past four decades. These suits principally allege personal injury resulting from exposure to asbestos-containing products and frequently seek both actual and punitive damages. The alleged claims primarily relate to products that UCC sold in the past, alleged exposure to asbestos-containing products located on UCC’s premises and UCC’s responsibility for asbestos suits filed against a former UCC subsidiary, Amchem Products, Inc. ("Amchem"). In many cases, plaintiffs are unable to demonstrate that they have suffered any compensable loss as a result of such exposure, or that injuries incurred in fact resulted from exposure to the Corporation’s products. The Corporation expects more asbestos-related suits to be filed against UCC and Amchem in the future, and will aggressively defend or reasonably resolve, as appropriate, both pending and future claims. Estimating the Asbestos-Related Liability Based on a study completed by Ankura Consulting Group, LLC ("Ankura") in January 2003, the Corporation increased its December 31, 2002, asbestos-related liability for pending and future claims for a 15-year period ending in 2017 to $2.2 billion , excluding future defense and processing costs. Since then, the Corporation has compared current asbestos claim and resolution activity to the results of the most recent Ankura study at each balance sheet date to determine whether the accrual continues to be appropriate. In addition, the Corporation has requested Ankura to review the Corporation's historical asbestos claim and resolution activity each year since 2004 to determine the appropriateness of updating the most recent Ankura study. In October 2016, the Corporation requested Ankura to review its historical asbestos claim and resolution activity and determine the appropriateness of updating its December 2014 study. In response to the request, Ankura reviewed and analyzed asbestos-related claim and resolution data through September 30, 2016. The resulting study, completed by Ankura in December 2016, provided estimates for the undiscounted cost of disposing of pending and future claims against UCC and Amchem, excluding future defense and processing costs, for both a 15-year period and through the terminal year of 2049. Based on the study completed in December 2016 by Ankura, and the Corporation's own review of the asbestos claim and resolution activity, it was determined that an adjustment to the accrual was necessary. The Corporation determined that using the estimate through the terminal year of 2049 was more appropriate due to increasing knowledge and data about the costs to resolve claims and diminished volatility in filing rates. Using the range in the Ankura December 2016 study, which was estimated to be between $502 million and $565 million for the undiscounted cost of disposing of pending and future claims, the Corporation increased its asbestos-related liability for pending and future claims through the terminal year of 2049 by $104 million , included in "Asbestos-related charge" in the consolidated statements of income. In September 2014, the Corporation began to implement a strategy designed to reduce and to ultimately stabilize and forecast defense costs associated with asbestos-related matters. The strategy included a number of important changes including: invoicing protocols including capturing costs by plaintiff; review of existing counsel roles, work processes and workflow; and utilization of enterprise legal management software, which enabled claim-specific tracking of asbestos-related defense and processing costs. The Corporation reviewed the information generated from this new strategy and determined that it now had the ability to reasonably estimate asbestos-related defense and processing costs for the same periods that it estimates its asbestos-related liability for pending and future claims. The Corporation believes that including estimates of the liability for asbestos-related defense and processing costs provides a more complete assessment and measure of the liability associated with resolving asbestos-related matters, which the Corporation believes is preferable in these circumstances. In October 2016, in addition to the study for asbestos claim and resolution activity, the Corporation requested Ankura to review asbestos-related defense and processing costs and provide an estimate of a reasonable forecast of defense and processing costs associated with resolving pending and future asbestos-related claims facing UCC and Amchem for the same periods of time that the Corporation uses for estimating resolution costs. In December 2016, Ankura conducted the study and provided the Corporation with an estimate of future defense and processing costs for both a 15-year period and through the terminal year of 2049. The resulting study estimated asbestos-related defense and processing costs for pending and future asbestos claims to be between $1,009 million and $1,081 million through the terminal year of 2049. In the fourth quarter of 2016, the Corporation elected to change its method of accounting for asbestos-related defense and processing costs from expensing as incurred to estimating and accruing a liability. This change is believed to be preferable as asbestos-related defense and processing costs represent expenditures related to legacy activities that do not contribute to current or future revenue generating activities of the Corporation. The change is also reflective of the manner in which the Corporation manages its asbestos-related exposure, including careful monitoring of the correlation between defense spending and resolution costs. Together, these two sources of cost more accurately represent the "total cost" of resolving asbestos-related claims now and in the future. This accounting policy change was reflected as a change in accounting estimate effected by a change in accounting principle. As a result of this accounting policy change and based on the December 2016 Ankura study of asbestos-related defense and processing costs and the Corporation's own review of the data, a pretax charge for asbestos-related defense and processing costs of $1,009 million was recorded in the fourth quarter of 2016, included in "Asbestos-related charge" in the consolidated statements of income. In October 2017, the Corporation requested Ankura to review its historical asbestos claim and resolution activity (including asbestos-related defense and processing costs) and determine the appropriateness of updating its December 2016 study. In response to that request, Ankura reviewed and analyzed data through September 30, 2017. In December 2017, Ankura stated that an update of its December 2016 study would not provide a more likely estimate of future events than the estimate reflected in the study and, therefore, the estimate in that study remained applicable. Based on the Corporation's own review of the asbestos claim and resolution activity (including asbestos-related defense and processing costs) and Ankura's response, the Corporation determined that no change to the accrual was required. At December 31, 2017, the asbestos-related liability for pending and future claims against UCC and Amchem, including future asbestos-related defense and processing costs, was $1,369 million , and approximately 16 percent of the recorded liability related to pending claims and approximately 84 percent related to future claims. In October 2018, the Corporation requested Ankura to review its historical asbestos claim and resolution activity (including asbestos-related defense and processing costs) and determine the appropriateness of updating its December 2016 study. In response to that request, Ankura reviewed and analyzed data through September 30, 2018. The resulting study, completed by Ankura in December 2018, provided estimates for the undiscounted cost of disposing of pending and future claims against UCC and Amchem, including future defense and processing costs, through the terminal year of 2049. Based on the study completed in December 2018 by Ankura, and the Corporation's own review, it was determined that no adjustment to the accrual was required. At December 31, 2018, the asbestos-related liability for pending and future claims against UCC and Amchem, including future asbestos-related defense and processing costs, was $1,260 million , and approximately 16 percent of the recorded liability related to pending claims and approximately 84 percent related to future claims. Insurance Receivables The Corporation has receivables for insurance recoveries related to its asbestos liability as well as receivables for defense and resolution costs submitted to insurance carriers that have a settlement agreement in place regarding their asbestos-related insurance coverage. The Corporation continues to believe that its recorded receivable for insurance recoveries from all insurance carriers is probable of collection. At December 31, 2018 , the Corporation's receivable for insurance recoveries related to its asbestos liability was $10 million ( $37 million at December 31, 2017 ). Summary The Corporation's management believes the amounts recorded for the asbestos-related liability (including defense and processing costs) reflect reasonable and probable estimates of the liability based on current, known facts. However, future events, such as the number of new claims to be filed and/or received each year and the average cost of defending and disposing of each such claim, as well as the numerous uncertainties surrounding asbestos litigation in the United States, could cause the actual costs for the Corporation to be higher or lower than those projected or those recorded. Any such event could result in an increase or decrease in the recorded liability. Because of the uncertainties described above, the Corporation cannot estimate the full range of the cost of resolving pending and future asbestos-related claims facing UCC and Amchem. As a result, it is reasonably possible that an additional cost of disposing of asbestos-related claims, including future defense and processing costs, could have a material impact on the Corporation's results of operations and cash flows for a particular period and on the consolidated financial position. Other Litigation While it is not possible at this time to determine with certainty the ultimate outcome of any of the legal proceedings and claims referred to in this filing, management believes that the possibility is remote that the aggregate of all such other claims and lawsuits will have a material adverse impact on the results of operations, cash flows and financial position of the Corporation. Purchase Commitments The Corporation has outstanding purchase commitments and various commitments for take-or-pay or throughput agreements. The Corporation was not aware of any purchase commitments that were negotiated as part of a financing arrangement for the facilities that will provide the contracted goods or services or for the costs related to those goods or services at December 31, 2018 and 2017 . Operating Leases The Corporation has leases primarily for facilities and distribution equipment. The future minimum rental payments under leases with remaining noncancelable terms in excess of one year are as follows: Minimum Lease Commitments at Dec 31, 2018 In millions 2019 $ 18 2020 16 2021 14 2022 13 2023 13 2024 and thereafter 37 Total $ 111 Rental expenses under leases were $31 million in 2018 , $32 million in 2017 and $28 million in 2016 .

ACCUMULATED OTHER COMPREHENSIVE

ACCUMULATED OTHER COMPREHENSIVE LOSS	12 Months Ended
	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Loss	ACCUMULATED OTHER COMPREHENSIVE LOSS The following table summarizes the changes and after-tax balances of each component of accumulated other comprehensive loss ("AOCL") for the years ended December 31, 2018 , 2017 and 2016 : Accumulated Other Comprehensive Loss Cumulative Translation Adj Pension and Other Postretire Benefits Total Accum Other Comp Loss In millions 2016 Balance at Jan 1, 2016 $ (61 ) $ (1,167 ) $ (1,228 ) Other comprehensive loss before reclassifications (1 ) (133 ) (134 ) Amounts reclassified from AOCL — 42 42 Net other comprehensive loss (1 ) (91 ) (92 ) Balance at Dec 31, 2016 $ (62 ) $ (1,258 ) $ (1,320 ) 2017 Other comprehensive loss before reclassifications — (83 ) (83 ) Amounts reclassified from AOCL 3 48 51 Net other comprehensive income (loss) 3 (35 ) (32 ) Balance at Dec 31, 2017 $ (59 ) $ (1,293 ) $ (1,352 ) 2018 Other comprehensive income (loss) before reclassifications 2 (22 ) (20 ) Amounts reclassified from AOCL — 65 65 Net other comprehensive income 2 43 45 Reclassification of stranded tax effects 1 — (254 ) (254 ) Balance at Dec 31, 2018 $ (57 ) $ (1,504 ) $ (1,561 ) 1. Amounts reclassified to retained earnings as a result of the adoption of ASU 2018-02. See Notes 1 and 2 for additional information. The tax effects on the net activity related to each component of other comprehensive income (loss) for the years ended December 31, 2018 , 2017 and 2016 were as follows: Tax Benefit (Expense) 1 In millions 2018 2017 2016 Pension and other postretirement benefit plans $ (13 ) $ (3 ) $ 54 1. Prior period amounts were updated to conform with the current year presentation. A summary of the reclassifications out of AOCL for the years ended December 31, 2018 , 2017 and 2016 is provided as follows: Reclassifications Out of AOCL Consolidated Statements of Income Classification 2018 2017 2016 In millions Cumulative translation adjustments $ — $ 3 $ — See (1) below Pension and other postretirement benefit plans 85 76 67 See (2) below Tax benefit (20 ) (28 ) (25 ) See (3) below After tax 65 48 42 Total reclassifications for the period, after-tax $ 65 $ 51 $ 42 1. "Sundry income (expense) - net." 2. Included in the computation of net periodic benefit cost of the Corporation's defined benefit pension and other postretirement benefit plans. See Note 15 for additional information. 3. "Provision (Credit) for income taxes."

PENSION PLANS AND OTHER POSTRET

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS	12 Months Ended
	Dec. 31, 2018
Retirement Benefits [Abstract]
PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS	PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS Pension Plans The Corporation has a defined benefit pension plan that covers substantially all employees in the United States. Benefits are based on length of service and the employee's three highest consecutive years of compensation. Employees hired on or after January 1, 2008, earn benefits that are based on a set percentage of annual pay, plus interest. The Corporation also has a non-qualified supplemental pension plan. The Corporation's funding policy is to contribute to the plan when pension laws or economics either require or encourage funding. In 2018 , UCC contributed $42 million to its pension plans including contributions to fund benefit payments for its non-qualified supplemental plan. UCC expects to contribute approximately $2 million to its pension plans in 2019 . The weighted-average assumptions used to determine pension plan obligations and net periodic benefit costs are provided below: Pension Plan Assumptions Benefit Obligations at Dec 31 Net Periodic Costs for the Year Ended 2018 2017 2018 2017 2016 Discount rate 4.32 % 3.59 % 3.59 % 4.00 % 4.26 % Interest crediting rate for applicable benefits 4.50 % 4.50 % 4.50 % 4.50 % 4.50 % Rate of compensation increase 4.25 % 4.25 % 4.25 % 4.25 % 4.50 % Expected return on plan assets — — 6.80 % 6.80 % 6.80 % Other Postretirement Benefits The Corporation provides certain health care and life insurance benefits to retired U.S. employees and survivors. The plan provides health care benefits, including hospital, physicians' services, drug and major medical expense coverage and life insurance benefits. The Corporation and the retiree share the cost of these benefits, with the Corporation portion increasing as the retiree has increased years of credited service, although there is a cap on the Corporation portion. The Corporation has the ability to change these benefits at any time. Employees hired after January 1, 2008, are not covered under this plan. The Corporation funds most of the cost of these health care and life insurance benefits as incurred. In 2018 , UCC did not make any contributions to its other postretirement benefit plan trust. Likewise, UCC does not expect to contribute assets to its other postretirement benefit plan trust in 2019 . The weighted-average assumptions used to determine other postretirement benefit obligations and net periodic benefit costs for the plan are provided in the following table: Plan Assumptions for Other Postretirement Benefits Benefit Obligations at Dec 31 Net Periodic Costs for the Year Ended 2018 2017 2018 2017 2016 Discount rate 4.23 % 3.51 % 3.51 % 3.88 % 4.08 % Health care cost trend rate assumed for next year 6.50 % 6.75 % 6.75 % 7.00 % 7.25 % Rate to which the cost trend rate is assumed to decline (the ultimate health care cost trend rate) 5.00 % 5.00 % 5.00 % 5.00 % 5.00 % Year that the rate reaches the ultimate health care cost trend rate 2025 2025 2025 2025 2025 Assumptions The Corporation determines the expected long-term rate of return on plan assets by performing a detailed analysis of key economic and market factors driving historical returns for each asset class and formulating a projected return based on factors in the current environment. Factors considered include, but are not limited to, inflation, real economic growth, interest rate yield, interest rate spreads, and other valuation measures and market metrics. The expected long-term rate of return for each asset class is then weighted based on the strategic asset allocation approved by the governing body for each plan. The Corporation's historical experience with the pension fund asset performance is also considered. The Corporation uses the spot rate approach to determine the discount rate utilized to measure the service cost and interest cost components of net periodic pension and other postretirement benefit costs. Under the spot rate approach, the Corporation calculates service cost and interest cost by applying individual spot rates from the Willis Towers Watson U.S. RATE:Link 60-90 corporate yield curve (based on 60th to 90th percentile high-quality corporate bond yields) to the separate expected cash flow components of service cost and interest cost. The discount rates utilized to measure the pension and other postretirement obligations of the U.S. qualified plans were based on the yield on high-quality corporate fixed income investments at the measurement date. Future expected actuarially determined cash flows for the plans are individually discounted at the spot rates under the Willis Towers Watson U.S. RATE:Link 60-90 corporate yield curve (based on 60th to 90th percentile high-quality corporate bond yields) to arrive at the plan’s obligations as of the measurement date. The Corporation utilizes a modified version of the Society of Actuaries’ mortality tables released in 2014 and a modified version of the generational mortality improvement scale released in 2018 for purposes of measuring the U.S. pension and other postretirement obligations, based on an evaluation of the mortality experience of its pension plans. Summarized information on the Corporation's pension and other postretirement benefit plans is as follows: Change in Projected Benefit Obligations, Plan Assets and Funded Status for all Plans Defined Benefit Pension Plans Other Postretirement Benefits In millions 2018 2017 2018 2017 Change in projected benefit obligations: Benefit obligation at beginning of year $ 4,150 $ 4,025 $ 224 $ 264 Service cost 39 38 1 1 Interest cost 128 129 6 8 Actuarial changes in assumptions and experience (249 ) 241 (2 ) (23 ) Benefits paid (278 ) (281 ) (14 ) (26 ) Other (4 ) (2 ) — — Benefit obligation at end of year $ 3,786 $ 4,150 $ 215 $ 224 Change in plan assets: Fair value of plan assets at beginning of year $ 3,307 $ 3,097 $ — $ — Actual return on plan assets (62 ) 331 — — Employer contributions 42 162 — — Asset transfers (4 ) (2 ) — — Benefits paid (278 ) (281 ) — — Fair value of plan assets at end of year $ 3,005 $ 3,307 $ — $ — Funded status at end of year $ (781 ) $ (843 ) $ (215 ) $ (224 ) Net amounts recognized in the consolidated balance sheets at Dec 31: Accrued and other current liabilities $ (2 ) $ (2 ) $ (19 ) $ (15 ) Pension and other postretirement benefits - noncurrent (779 ) (841 ) (196 ) (209 ) Net amount recognized $ (781 ) $ (843 ) $ (215 ) $ (224 ) Pretax amounts recognized in accumulated other comprehensive loss at Dec 31: Net loss (gain) $ 2,019 $ 2,083 $ (79 ) $ (86 ) Prior service credit (11 ) (12 ) — — Pretax balance in accumulated other comprehensive loss at end of year $ 2,008 $ 2,071 $ (79 ) $ (86 ) A significant component of the overall decrease in the Corporation's benefit obligation for the year ended December 31, 2018 was due to the weighted-average change in discount rates, which increased from 3.59 percent at December 31, 2017 to 4.32 percent at December 31, 2018. A significant component of the overall increase in the Corporation's benefit obligation for the year ended December 31, 2017 was also due to the weighted-average change in discount rates, which decreased from 4.00 percent at December 31, 2016 to 3.59 percent at December 31, 2017. The accumulated benefit obligation for all defined benefit pension plans was $3.8 billion at December 31, 2018 and $4.1 billion at December 31, 2017 . Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets at Dec 31 In millions 2018 2017 Accumulated benefit obligations $ 3,762 $ 4,120 Fair value of plan assets $ 3,005 $ 3,307 Pension Plans with Projected Benefit Obligations in Excess of Plan Assets at Dec 31 2018 2017 In millions Projected benefit obligations $ 3,786 $ 4,150 Fair value of plan assets $ 3,005 $ 3,307 Net Periodic Benefit Cost for All Plans for the Year Ended Dec 31 Defined Benefit Pension Plans Other Postretirement Benefits In millions 2018 2017 2016 2018 2017 2016 Net Periodic Benefit Cost: Service cost $ 39 $ 38 $ 39 $ 1 $ 1 $ 1 Interest cost 128 129 131 6 8 8 Expected return on plan assets (218 ) (221 ) (217 ) — — — Amortization of prior service credit (1 ) (1 ) (1 ) — — — Amortization of net (gain) loss 95 83 75 (9 ) (6 ) (7 ) Net periodic benefit cost $ 43 $ 28 $ 27 $ (2 ) $ 3 $ 2 Changes in plan assets and benefit obligations recognized in other comprehensive (income) loss: Net (gain) loss $ 31 $ 131 $ 208 $ (2 ) $ (23 ) $ 4 Amortization of prior service credit 1 1 1 — — — Amortization of net gain (loss) (95 ) (83 ) (75 ) 9 6 7 Total recognized in other comprehensive (income) loss $ (63 ) $ 49 $ 134 $ 7 $ (17 ) $ 11 Total recognized in net periodic benefit cost and other comprehensive (income) loss $ (20 ) $ 77 $ 161 $ 5 $ (14 ) $ 13 On January 1, 2018, the Corporation adopted ASU 2017-07, which impacted the presentation of the components of net periodic benefit cost in the consolidated statements of income. Net periodic benefit cost, other than the service cost component, is now included in "Sundry income (expense) - net" in the consolidated statements of income. See Notes 1 , 2 and 6 for additional information. Estimated Future Benefit Payments The estimated future benefit payments, reflecting expected future service, as appropriate, are presented in the following table: Estimated Future Benefit Payments at Dec 31, 2018 Defined Benefit Pension Plans Other Postretirement Benefits In millions 2019 $ 277 $ 19 2020 276 19 2021 275 20 2022 274 20 2023 271 19 2024 through 2028 1,293 76 Total $ 2,666 $ 173 Plan Assets Plan assets consist primarily of equity and fixed income securities of U.S. and foreign issuers, and include alternative investments such as real estate, private equity and other absolute return strategies. Plan assets totaled $3.0 billion at December 31, 2018 and $3.3 billion at December 31, 2017 , and included no directly held common stock of DowDuPont. The Corporation's investment strategy for the plan assets is to manage the assets in relation to the liability in order to pay retirement benefits to plan participants over the life of the plans. This is accomplished by identifying and managing the exposure to various market risks, diversifying investments across various asset classes and earning an acceptable long-term rate of return consistent with an acceptable amount of risk, while considering the liquidity needs of the plan. The plan is permitted to use derivative instruments for investment purposes, as well as for hedging the underlying asset and liability exposures and rebalancing the asset allocation. The plan uses value-at-risk, stress testing, scenario analysis and Monte Carlo simulation to monitor and manage both the risk within the portfolios and the surplus risk of the plan. Equity securities primarily include investments in large- and small-cap companies located in both developed and emerging markets around the world. Fixed income securities are primarily U.S. dollar based and include U.S. treasuries and investment grade corporate bonds of companies diversified across industries. Alternative investments primarily include investments in real estate, private equity limited partnerships and absolute return strategies. Other significant investment types include various insurance contracts, and interest rate, equity and foreign exchange derivative investments and hedges. The Corporation mitigates the credit risk of investments by establishing guidelines with the investment managers that limit investment in any single issue or issuer to an amount that is not material to the portfolio being managed. These guidelines are monitored for compliance both by the Corporation and the external managers. Credit risk for hedging activity is mitigated by utilizing multiple counterparties, collateral support agreements, and centralized clearing where appropriate. The Northern Trust Collective Government Short Term Investment money market fund is utilized as the sweep vehicle for the pension plan, which from time to time can represent a significant investment. Approximately 35 percent of the liability of the pension plan is covered by a participating group annuity issued by Prudential Insurance Company. The weighted-average target allocation for plan assets of the Corporation's pension plans is summarized as follows: Target Allocation for Plan Assets at Dec 31, 2018 Target Allocation Asset Category Equity securities 23 % Fixed income securities 45 Alternative investments 27 Other 5 Total 100 % Fair value calculations may not be indicative of net realizable value or reflective of future fair values. Furthermore, although the Corporation believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date. For assets classified as Level 1 measurements (measured using quoted prices in active markets), the total fair value is either the price of the most recent trade at the time of the market close or the official close price, as defined by the exchange on which the asset is most actively traded on the last trading day of the period, multiplied by the number of units held without consideration of transaction costs. For assets classified as Level 2 measurements, where the security is frequently traded in less active markets, fair value is based on the closing price at the end of the period; where the security is less frequently traded, fair value is based on the price a dealer would pay for the security or similar securities, adjusted for any terms specific to that asset or liability. Market inputs are obtained from well-established and recognized vendors of market data and subjected to tolerance and quality checks. For derivative assets and liabilities, standard industry models are used to calculate the fair value of the various financial instruments based on significant observable market inputs such as foreign exchange rates, commodity prices, swap rates, interest rates, and implied volatilities obtained from various market sources. For other assets for which observable inputs are used, fair value is derived through the use of fair value models, such as a discounted cash flow model or other standard pricing models. For pension plan assets classified as Level 3 measurements, total fair value is based on significant unobservable inputs including assumptions where there is little, if any, market activity for the investment. Certain pension plan assets are held in funds where fair value is based on an estimated net asset value per share (or its equivalent) as of the most recently available fund financial statements which are received on a monthly or quarterly basis. These valuations are reviewed for reasonableness based on applicable sector, benchmark and company performance. Adjustments to valuations are made where appropriate to arrive at an estimated net asset value per share at the measurement date. These funds are not classified within the fair value hierarchy. The following table summarizes the bases used to measure the Corporation’s pension plan assets at fair value for the years ended December 31, 2018 and 2017 : Basis of Fair Value Measurements Dec 31, 2018 Dec 31, 2017 In millions Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Cash and cash equivalents $ 189 $ 189 $ — $ — $ 193 $ 153 $ 40 $ — Equity securities: U.S. equity securities $ 277 $ 275 $ 2 $ — $ 374 $ 357 $ 17 $ — Non - U.S. equity securities 321 269 46 6 472 404 61 7 Total equity securities $ 598 $ 544 $ 48 $ 6 $ 846 $ 761 $ 78 $ 7 Fixed income securities: Debt - government-issued $ 812 $ 8 $ 804 $ — $ 873 $ — $ 873 $ — Debt - corporate-issued 413 11 402 — 515 — 515 — Debt - asset-backed 30 — 30 — 24 — 24 — Total fixed income securities $ 1,255 $ 19 $ 1,236 $ — $ 1,412 $ — $ 1,412 $ — Alternative investments: 1 Derivatives - asset position $ 12 $ — $ 12 $ — $ 6 $ — $ 6 $ — Derivatives - liability position — — — — (32 ) — (32 ) — Total alternative investments $ 12 $ — $ 12 $ — $ (26 ) $ — $ (26 ) $ — Other investments $ — $ — $ — $ — $ (6 ) $ — $ (6 ) $ — Subtotal $ 2,054 $ 752 $ 1,296 $ 6 $ 2,419 $ 914 $ 1,498 $ 7 Investments measured at net asset value: 1 Hedge funds $ 287 $ 292 Private market securities 335 237 Real estate 327 360 Total investments measured at net asset value $ 949 $ 889 Items to reconcile to fair value of plan assets: Pension trust receivables 2 $ 2 $ 2 Pension trust payables 3 — (3 ) Total $ 3,005 $ 3,307 1. The Corporation reviewed its fair value techniques and elected to present assets valued at net asset value per share as a practical expedient outside of the fair value hierarchy. The assets are presented as "Investments measured at net asset value." Prior period amounts were updated to conform with the current year presentation. 2. Primarily receivables for investment securities sold. 3. Primarily payables for investment securities purchased. The following table summarizes the changes in fair value of Level 3 pension plan assets for the years ended December 31, 2018 and 2017 : Fair Value Measurement of Level 3 Pension Plan Assets Equity Securities Alternative Investments Other Investments Total In millions Balance at Jan 1, 2017, as previously reported $ 6 $ 724 $ 19 $ 749 Reclassification of investments measured at net asset value 1 — (713 ) (19 ) (732 ) Balance at Jan 1, 2017, as restated $ 6 $ 11 $ — $ 17 Actual return on plan assets: Relating to assets held at Dec 31, 2017 — (2 ) — (2 ) Purchases, sales and settlements 1 (9 ) — (8 ) Balance at Dec 31, 2017 $ 7 $ — $ — $ 7 Actual return on plan assets: Relating to assets held at Dec 31, 2018 (1 ) — — (1 ) Balance at Dec 31, 2018 $ 6 $ — $ — $ 6 1. The Corporation reviewed its fair value technique and elected to present assets valued at at net asset value per share as a practical expedient outside of the fair value hierarchy, including those classified as Level 3 pension plan assets. The assets are presented as "Investments measured at net asset value." Defined Contribution Plans In addition to the qualified defined benefit pension plan, U.S. employees may participate in defined contribution plans (Employee Savings Plans or 401(k) plans) by contributing a portion of their compensation, which is partially matched by the Corporation. Expense recognized for all defined contribution plans was $15 million in 2018 , $21 million in 2017 and $17 million in 2016 .

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS The Corporation's investments in marketable securities are classified as available-for-sale. Proceeds from sales of available-for-sale securities were zero in 2018 ( $2 million in 2017 and 2016 ). Portfolio managers regularly review all of the Corporation's holdings to determine if any investments are other-than-temporarily impaired. The analysis includes reviewing the amount of the impairment, as well as the length of time it has been impaired. In addition, specific guidelines for each instrument type are followed to determine if an other-than-temporary impairment has occurred. At December 31, 2018 and 2017 , there were no impairment indicators or circumstances that would result in a material adjustment of these investments. The Corporation's financial instruments are classified as Level 2 measurements. For assets and liabilities classified as Level 2 measurements, where the security is frequently traded in less active markets, fair value is based on the closing price at the end of the period; where the security is less frequently traded, fair value is based on the price a dealer would pay for the security or similar securities, adjusted for any terms specific to that asset or liability, or by using observable market data points of similar, more liquid securities to imply the price. Market inputs are obtained from well-established and recognized vendors of market data and subjected to tolerance/quality checks. Assets that are measured using significant other observable inputs are primarily valued by reference to quoted prices of similar assets in active markets, adjusted for any terms specific to that asset. For all other assets for which observable inputs are used, fair value is derived through the use of fair value models, such as a discounted cash flow model or other standard pricing models. There were no transfers between Levels 1 and 2 in the years ended December 31, 2018 and 2017 . The following table summarizes the fair value of the Corporation's financial instruments at December 31, 2018 and 2017 : Fair Value of Financial Instruments 2018 2017 In millions Cost Gain Loss Fair Value Cost Gain Loss Fair Value Cash equivalents 1 $ 10 $ — $ — $ 10 $ 9 $ — $ — $ 9 Long-term debt including debt due within one year $ (474 ) $ — $ (67 ) $ (541 ) $ (475 ) $ — $ (129 ) $ (604 ) 1. Money market fund is included in "Cash and cash equivalents" in the consolidated balance sheets and held at amortized cost, which approximates fair value. Cost approximates fair value for all other financial instruments.

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS	12 Months Ended
	Dec. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS The Corporation sells its products to Dow to simplify the customer interface process. Products are sold to and purchased from Dow at market-based prices in accordance with the terms of Dow’s intercompany pricing policies. After each quarter, the Corporation and Dow analyze the pricing used for the sales in that quarter and reach agreement on any necessary adjustments, at which point the prices are final. The Corporation also procures certain commodities and raw materials through a Dow subsidiary and pays a commission to that Dow subsidiary based on the volume and type of commodities and raw materials purchased. The commission expense was included in "Sundry income (expense) - net" in the consolidated statements of income. Purchases from that Dow subsidiary were approximately $1.6 billion in 2018 , $1.7 billion in 2017 and $1.4 billion in 2016 . The Corporation has a master services agreement with Dow whereby Dow provides services including, but not limited to, accounting, legal, treasury (investments, cash management, risk management, insurance), procurement, human resources, environmental, health and safety, and business management for UCC. Under the master services agreement with Dow, general administrative and overhead type services that Dow routinely allocates to various businesses are charged to UCC. The master services agreement cost allocation basis is headcount and includes a 10 percent service fee. This agreement resulted in expense of $30 million in 2018 , $33 million in 2017 and $27 million in 2016 for general administrative and overhead type services and the 10 percent service fee, and was included in "Sundry income (expense) - net" in the consolidated statements of income. The remaining activity-based costs were approximately $85 million in 2018 , $78 million in 2017 and $58 million in 2016 and were included in "Cost of sales" in the consolidated statements of income. Management believes the method used for determining expenses charged by Dow is reasonable. Dow provides these services by leveraging its centralized functional service centers to provide services at a cost that management believes provides an advantage to the Corporation. The monitoring and execution of risk management policies related to interest rate and foreign currency risks, which are based on Dow’s risk management philosophy, are provided as a service to UCC. As part of Dow’s cash management process, UCC is a party to revolving loans with Dow that have interest rates based on LIBOR (London Interbank Offered Rate) with varying maturities. At December 31, 2018 , the Corporation had a note receivable of $1.3 billion ( $1.2 billion at December 31, 2017 ) from Dow under a revolving loan agreement. The Corporation may draw from this note receivable in support of its daily working capital requirements and, as such, the net effect of cash inflows and outflows under this revolving loan agreement is presented in the consolidated statements of cash flows as an operating activity. The Corporation also has a separate revolving credit agreement with Dow that allows the Corporation to borrow or obtain credit enhancements up to an aggregate of $1 billion that matures on December 30, 2019. Dow may demand repayment with a 30-day written notice to the Corporation, subject to certain restrictions. A related collateral agreement provides for the replacement of certain existing pledged assets, primarily equity interests in various subsidiaries and joint ventures, with cash collateral. At December 31, 2018 , $949 million ( $949 million at December 31, 2017 ) was available under the revolving credit agreement. The cash collateral was reported as "Noncurrent receivables from related companies" in the consolidated balance sheets. On a quarterly basis, the Corporation's Board of Directors reviews and determines if there will be a dividend distribution to its parent company and sole shareholder, Dow. The Board takes into consideration the level of earnings and cash flows, among other factors, in determining the amount of the dividend distribution. In 2018 , the Corporation declared and paid dividends totaling $553 million to Dow. In 2017 , the Corporation declared and paid dividends totaling $603 million to Dow. In accordance with the Tax Sharing Agreement between the Corporation and Dow, the Corporation makes payments to Dow to cover the Corporation's estimated federal tax liability; payments were $220 million in 2018 , $294 million in 2017 and $415 million in 2016 .

BUSINESS AND GEOGRAPHIC AREAS

BUSINESS AND GEOGRAPHIC AREAS	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Business and Geographic Regions	BUSINESS AND GEOGRAPHIC REGIONS Dow conducts its worldwide operations through principal product groups, and the Corporation's business activities comprise components of Dow's principal product groups rather than stand-alone operations. The Corporation sells substantially all of its products to Dow in order to simplify the customer interface process at market-based prices in accordance with Dow's intercompany pricing policy. Because there are no separable reportable business segments for the Corporation and no detailed business information is provided to a chief operating decision maker regarding the Corporation's stand-alone operations, the Corporation's results are reported as a single operating segment. Sales are attributed to geographic regions based on customer location; long-lived assets are attributed to geographic regions based on asset location. Sales to external customers and long-lived assets by geographic region were as follows: Geographic Region Information United States Asia Pacific Rest of World Total In millions 2018 Sales to external customers 1 $ 124 $ 2 $ 10 $ 136 Long-lived assets $ 1,413 $ 10 $ 25 $ 1,448 2017 Sales to external customers 1 $ 110 $ 21 $ 12 $ 143 Long-lived assets $ 1,341 $ 9 $ 29 $ 1,379 2016 Sales to external customers 1 $ 95 $ 3 $ 10 $ 108 Long-lived assets $ 1,353 $ 10 $ 31 $ 1,394 1. Of total sales to external customers, sales in Malaysia were approximately 1 percent in 2018, 15 percent in 2017 and 3 percent in 2016, and are included in Asia Pacific.

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Principles of Consolidation and Basis of Presentation	Principles of Consolidation and Basis of Presentation Except as otherwise indicated by the context, the terms "Corporation" and "UCC" as used herein mean Union Carbide Corporation and its consolidated subsidiaries. The accompanying consolidated financial statements of the Corporation were prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") and include the assets, liabilities, revenues and expenses of all majority-owned subsidiaries over which the Corporation exercises control and, when applicable, entities for which the Corporation has a controlling financial interest. Investments in nonconsolidated affiliates (20-50 percent owned companies, joint ventures and partnerships) are accounted for using the equity method. The Corporation is a wholly owned subsidiary of The Dow Chemical Company ("Dow"). In accordance with the accounting guidance for earnings per share, the presentation of earnings per share is not required in financial statements of wholly owned subsidiaries. The Corporation’s business activities comprise components of Dow’s global operations rather than stand-alone operations. Dow conducts its worldwide operations through principal product groups. Because there are no separable reportable business segments for UCC under the accounting guidance related to segment reporting and no detailed business information is provided to a chief operating decision maker regarding the Corporation’s stand-alone operations, the Corporation’s results are reported as a single operating segment. Effective August 31, 2017, pursuant to the merger of equals transaction contemplated by the Agreement and Plan of Merger, dated as of December 11, 2015, as amended on March 31, 2017, Dow and E. I. du Pont de Nemours and Company ("DuPont") each merged with subsidiaries of DowDuPont Inc. ("DowDuPont") and, as a result, Dow and DuPont became subsidiaries of DowDuPont (the "Merger"). See Note 3 for additional information. Intercompany transactions and balances are eliminated in consolidation. Transactions with the Corporation’s parent company, Dow, and other subsidiaries of Dow and DowDuPont, have been reflected as related company transactions in the consolidated financial statements. See Note 17 for additional information.
Use of Estimates in Financial Statement Preparation	Use of Estimates in Financial Statement Preparation The preparation of financial statements in accordance with U.S. GAAP requires the use of estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. The Corporation's consolidated financial statements include amounts that are based on management's best estimates and judgments. Actual results could differ from those estimates.
Asbestos-Related Matters	Asbestos-Related Matters Accruals for asbestos-related matters, including defense and processing costs, are recorded based on an analysis of claim and resolution activity, defense spending and pending and future claims. These accruals are assessed at each balance sheet date to determine if the asbestos-related liability remains appropriate. Accruals for asbestos-related matters are included in the consolidated balance sheets in "Asbestos-related liabilities - current" and "Asbestos-related liabilities - noncurrent." See Note 13 for additional information.
Legal Costs	Legal Costs The Corporation expenses legal costs as incurred, with the exception of defense and processing costs associated with asbestos-related matters.
Foreign Currency Translation	Foreign Currency Translation While the Corporation's consolidated subsidiaries are primarily based in the United States, the Corporation has small subsidiaries in Asia Pacific and the rest of the world. For those subsidiaries, the local currency has been primarily used as the functional currency. Translation gains and losses of those operations that use local currency as the functional currency are included in the consolidated balance sheets in "Accumulated other comprehensive loss" ("AOCL"). Where the U.S. dollar is used as the functional currency, foreign currency gains and losses are reflected in income.
Environmental Matters	Environmental Matters Accruals for environmental matters are recorded when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated based on current law and existing technologies. These accruals are adjusted periodically as assessment and remediation efforts progress or as additional technical or legal information becomes available. Accruals for environmental liabilities are included in the consolidated balance sheets in "Accrued and other current liabilities" and "Other noncurrent obligations" at undiscounted amounts. Accruals for related insurance or other third-party recoveries for environmental liabilities are recorded when it is probable that a recovery will be realized and are included in the consolidated balance sheets in "Accounts receivable - Other." Environmental costs are capitalized if the costs extend the life of the property, increase its capacity, and/or mitigate or prevent contamination from future operations. Environmental costs are also capitalized in recognition of legal asset retirement obligations resulting from the acquisition, construction and/or normal operation of a long-lived asset. Costs related to environmental contamination treatment and cleanup are charged to expense. Estimated future incremental operations, maintenance and management costs directly related to remediation are accrued when such costs are probable and reasonably estimable.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents include time deposits and investments with maturities of three months or less at the time of purchase.
Financial Instruments	Financial Instruments The Corporation calculates the fair value of financial instruments using quoted market prices when available. When quoted market prices are not available for financial instruments, the Corporation uses standard pricing models with market-based inputs that take into account the present value of estimated future cash flows.
Inventories	Inventories Inventories are stated at the lower of cost or net realizable value. The method of determining cost for each subsidiary varies among last-in, first-out ("LIFO"); first-in, first-out ("FIFO"); and average cost, and is used consistently from year to year. The Corporation routinely exchanges and swaps raw materials and finished goods with other companies to reduce delivery time, freight and other transportation costs. These transactions are treated as non-monetary exchanges and are valued at cost.
Property	Property Land, buildings and equipment, including property under capital lease agreements, are carried at cost less accumulated depreciation. Depreciation is based on the estimated service lives of depreciable assets and is calculated using the straight-line method. Fully depreciated assets are retained in property and accumulated depreciation accounts until they are removed from service. In the case of disposals, assets and related accumulated depreciation are removed from the accounts, and the net amounts, less proceeds from disposal, are included in income.
Impairment and Disposal of Long-Lived Assets	Impairment and Disposal of Long-Lived Assets The Corporation evaluates long-lived assets and certain identifiable intangible assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. When undiscounted future cash flows are not expected to be sufficient to recover an asset's carrying amount, the asset is written down to its fair value based on bids received from third parties or a discounted cash flow analysis based on market participant assumptions. Long-lived assets to be disposed of by sale, if material, are classified as held for sale and reported at the lower of carrying amount or fair value less cost to sell, and depreciation is ceased. Long-lived assets to be disposed of other than by sale are classified as held and used until they are disposed of and reported at the lower of carrying amount or fair value, and depreciation is recognized over the remaining useful life of the assets.
Other Intangible Assets	Other Intangible Assets Finite-lived intangible assets such as purchased customer lists, developed technology, patents, trademarks and software, are amortized over their estimated useful lives, generally on a straight-line basis for periods ranging primarily from three to twenty years.
Investments in Related Companies	Investments in Related Companies Investments in related companies consist of the Corporation's ownership interests in Dow subsidiaries located in North America and Latin America. The Corporation accounts for these investments using the cost method as it does not have significant influence over the operating and financial policies of these related companies.
Revenue	Revenue Effective January 1, 2018, the Corporation recognizes revenue in accordance with Accounting Standards Update ("ASU") 2014-09, "Revenue from Contracts with Customers (Topic 606)," and the associated ASUs (collectively, "Topic 606"). Substantially all of the Corporation's revenues are generated by sales to Dow. Revenue for product sales to related companies is recognized when the related company obtains control of the product, which occurs either at the time that production is complete or shipped free on board ("FOB") from UCC's manufacturing facility, in accordance with the sales agreement between the Corporation and Dow. The Corporation recognizes revenue for product sales to trade customers when its customer obtains control of promised goods or services, in an amount that reflects the consideration which the Corporation expects to receive in exchange for those goods or services. To determine revenue recognition for the arrangements that the Corporation determines are within the scope of Topic 606, the Corporation performs the following five steps: (1) identify the contract(s) with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract, and (5) recognize revenue when (or as) the entity satisfies a performance obligation. See Note 4 for additional information. In periods prior to the adoption of Topic 606, the Corporation's accounting policy for product sales was to recognize revenue as risk and title to the product transfered to the related company or customer. Revenue related to the initial licensing of patents and technology was recognized when earned; revenue related to running royalties was recognized according to licensee production levels.
Severance Costs	Severance Costs Management routinely reviews its operations around the world in an effort to ensure competitiveness across its operations and geographic regions. When the reviews result in a workforce reduction related to the shutdown of facilities or other optimization activities, severance benefits are provided to employees primarily under ongoing benefit arrangements. These severance costs are accrued once management commits to a plan of termination and it becomes probable that employees will be entitled to benefits at amounts that can be reasonably estimated.
Integration and Separation Costs	Integration and Separation Costs The Corporation classifies expenses related to the Merger as integration and separation costs. Merger-related costs include: costs incurred to prepare for and close the Merger, post-Merger integration expenses and costs incurred to prepare for the separation of Dow’s agriculture business, materials science business and specialty products business.
Income Taxes	Income Taxes The Corporation accounts for income taxes using the asset and liability method. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences of temporary differences between the carrying amounts and tax bases of assets and liabilities using enacted tax rates. The effect of a change in tax rates on deferred tax assets or liabilities is recognized in income in the period that includes the enactment date. The Corporation uses the portfolio approach for releasing income tax effects from AOCL. The Corporation is included in the same consolidated federal income tax group and consolidated income tax return as Dow. The Corporation accounts for its income taxes following the formula in the Dow-UCC Tax Sharing Agreement used to compute the amount due to Dow or UCC for UCC's share of taxable income and tax attributes on the consolidated income tax return. This method generally follows the separate return method. The amounts reported as income taxes payable or receivable represent the Corporation's payment obligation (or refundable amount) to Dow based on a theoretical tax liability calculated on a separate return method. The Corporation recognizes the financial statement effects of an uncertain income tax position when it is more likely than not, based on the technical merits, that the position will be sustained upon examination. The Corporation accrues for non-income tax contingencies when it is probable that a liability to a taxing authority has been incurred and the amount of the contingency can be reasonably estimated. Provision is made for taxes on undistributed earnings of foreign subsidiaries and related companies to the extent that such earnings are not deemed to be permanently invested.

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Schedule of Error Corrections and Prior Period Adjustments	The following table summarizes the changes made to the consolidated statement of income for the years ended December 31, 2017 and 2016 : Summary of Changes to the Consolidated Statements of Income 2017 2016 In millions As Filed Updated As Filed Updated Cost of sales $ 4,176 $ 4,184 $ 3,713 $ 3,724 Sundry income (expense) - net $ (11 ) $ (3 ) $ 16 $ 27

SUPPLEMENTARY INFORMATION (Tabl

SUPPLEMENTARY INFORMATION (Tables)	12 Months Ended
	Dec. 31, 2018
Supplementary Information [Abstract]
Sundry Income, Net	Sundry Income (Expense) - Net In millions 2018 2017 2016 Dow administrative and overhead fees 1 $ (30 ) $ (33 ) $ (27 ) Net commission expense - related company 1 (22 ) (22 ) (22 ) Net gain on sales of property — 23 50 Interest income 28 20 14 Non-operating pension and other postretirement benefit plan net credits (costs) 2 (1 ) 8 11 Net gain on sale of a nonconsolidated affiliate — 4 — Foreign exchange gain — — 1 Other - net (9 ) (3 ) — Total sundry income (expense) - net $ (34 ) $ (3 ) $ 27 1. See Note 17 for additional information. 2. Presented in accordance with ASU 2017-07. See Notes 1 , 2 and 15 for additional information.

INCOME TAXES (Tables)

INCOME TAXES (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Schedule of geographic allocation of income	Geographic Allocation of Income and Provision (Credit) for Income Taxes In millions 2018 2017 2016 Income (Loss) before income taxes Domestic $ 1,305 $ 856 $ 49 Foreign (3 ) (6 ) 8 Income before income taxes $ 1,302 $ 850 $ 57 Current tax expense (benefit) Federal $ 166 $ 226 $ 265 State and local 6 2 (3 ) Foreign 40 3 3 Total current tax expense $ 212 $ 231 $ 265 Deferred tax expense (benefit) Federal 1 $ 27 $ 392 $ (285 ) State and local 8 22 (12 ) Total deferred tax expense (benefit) $ 35 $ 414 $ (297 ) Provision (Credit) for income taxes $ 247 $ 645 $ (32 ) Net income $ 1,055 $ 205 $ 89 1. 2018 and 2017 includes the impact of The Act; 2016 includes the impact of the asbestos-related charge.
Schedule of Effective Income Tax Rate Reconciliation	Reconciliation to U.S. Statutory Rate 2018 2017 2016 Statutory U.S. federal income tax rate 21.0 % 35.0 % 35.0 % U.S. manufacturing deductions — — (14.0 ) Unrecognized tax benefits (0.3 ) (0.4 ) (45.6 ) Foreign Derived Intangible Income ("FDII") deduction (2.2 ) — — Federal tax accrual adjustments (0.3 ) (1.1 ) (12.3 ) Impact of U.S. tax reform (0.2 ) 29.4 — Deferred intercompany gain — 11.4 — State and local tax impact 1.0 2.2 (24.6 ) Other - net — (0.6 ) 5.4 Effective Tax Rate 1 19.0 % 75.9 % (56.1 )% 1. The tax rate for 2018 was favorably impacted by The Act and the FDII deduction. The tax rate for 2017 was unfavorably impacted by The Act and the recognition of a deferred gain. The tax rate for 2016 was favorably impacted by the release of a reserve in excess of the settlement of an uncertain tax position and from the asbestos-related charge.
Schedule of Deferred Tax Assets and Liabilities	Deferred Tax Balances at Dec 31 2018 2017 In millions Assets Liabilities Assets Liabilities Property $ — $ 129 $ — $ 132 Tax loss and credit carryforwards 42 — 47 — Postretirement benefit obligations 234 — 251 — Other accruals and reserves 326 8 349 1 Inventory 8 — 8 — Other - net 11 2 9 1 Subtotal $ 621 $ 139 $ 664 $ 134 Valuation allowances 1 (19 ) — (19 ) — Total $ 602 $ 139 $ 645 $ 134 1. Primarily related to the realization of recorded tax benefits on state tax loss carryforwards from operations in the United States.
Summary of Operating Loss Carryforwards	Operating Loss and Tax Credit Carryforwards 2018 2017 In millions Asset Asset Operating loss carryforwards Expire within 5 years $ 31 $ 29 Expire after 5 years or indefinite expiration 5 12 Total operating loss carryforwards $ 36 $ 41 Tax credit carryforwards Expire within 5 years $ — $ 1 Expire after 5 years or indefinite expiration 6 5 Total tax credit carryforwards $ 6 $ 6
Schedule of Total Gross Unrecognized Tax Benefits	The following table provides a reconciliation of the Corporation's unrecognized tax benefits: Total Gross Unrecognized Tax Benefits In millions 2018 2017 2016 Total unrecognized tax benefits at Jan 1 $ 1 $ 1 $ 68 Increases related to positions taken on items from prior years — — 139 Settlement of uncertain tax positions with tax authorities — — (206 ) Total unrecognized tax benefits at Dec 31 $ 1 $ 1 $ 1 Total unrecognized tax benefits that, if recognized, would impact the effective tax rate $ 1 $ 1 $ 1 Total amount of interest and penalties (benefit) recognized in "Provision (Credit) for income taxes" $ (5 ) $ (6 ) $ (36 ) In the fourth quarter of 2016, a settlement in the amount of $206 million was reached for a tax matter regarding a historical change in the legal ownership structure of a nonconsolidated affiliate. As a result of the settlement, the Corporation recorded a net decrease to uncertain tax positions of $67 million in "Other noncurrent obligations" in the consolidated balance sheets.
Schedule of Tax Years Subject to Examination by Major Tax Jurisdiction	Tax years that remain subject to examination for the Corporation's major tax jurisdictions are shown below: Tax Years Subject to Examination by Major Tax Jurisdiction at Dec 31, 2018 Earliest Open Year Jurisdiction United States: Federal income tax 2004 State and local income tax 2004

INVENTORIES (Tables)

INVENTORIES (Tables)	12 Months Ended
	Dec. 31, 2018
Inventory Disclosure [Abstract]
Schedule of Inventory, Current	The following table provides a breakdown of inventories: Inventories at Dec 31 In millions 2018 2017 Finished goods $ 264 $ 222 Work in process 45 47 Raw materials 45 48 Supplies 85 73 Total $ 439 $ 390 Adjustment of inventories to a LIFO basis (135 ) (112 ) Total inventories $ 304 $ 278

PROPERTY (Tables)

PROPERTY (Tables)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Schedule of property	The following table provides a breakdown of property: Property at Dec 31 Estimated Useful Lives (Years) In millions 2018 2017 Land and land improvements 0-25 $ 285 $ 283 Buildings 5-50 412 402 Machinery and equipment 3-20 6,205 6,049 Other property 3-30 338 325 Construction in progress — 190 250 Total property $ 7,430 $ 7,309
Schedule of other items related to property	The following table provides information regarding depreciation expense and capitalized interest: In millions 2018 2017 2016 Depreciation expense $ 179 $ 176 $ 166 Capitalized interest $ 7 $ 10 $ 13

INVESTMENTS IN RELATED COMPAN_2

INVESTMENTS IN RELATED COMPANIES (Tables)	12 Months Ended
	Dec. 31, 2018
Investments in Related Companies [Abstract]
Schedule of Cost Method Investments	The Corporation's ownership interests in related companies at December 31, 2018 and 2017 were as follows: Investments in Related Companies at Dec 31 Ownership Interest Investment Balance In millions 2018 2017 2018 2017 Dow International Holdings Company 12 % 12 % $ 633 $ 633 Dow Quimica Mexicana S.A. de C.V. 15 % 15 % 5 5 Other — % — % 1 1 Total Investments in Related Companies $ 639 $ 639

INTANGIBLE ASSETS (Tables)

INTANGIBLE ASSETS (Tables)	12 Months Ended
	Dec. 31, 2018
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Intangible Assets	The following table provides information regarding the Corporation's intangible assets: Intangible Assets at Dec 31 2018 2017 In millions Gross Carrying Amount Accum Amort Net Gross Carrying Amount Accum Amort Net Intangible assets with finite lives: Licenses and developed technology $ 33 $ (33 ) $ — $ 33 $ (33 ) $ — Software 79 (54 ) 25 74 (49 ) 25 Total intangible assets $ 112 $ (87 ) $ 25 $ 107 $ (82 ) $ 25
Schedule Of Finite Lived Intangible Assets Amortization Expense Table	The following table provides information regarding amortization expense: Amortization Expense In millions 2018 2017 2016 Software 1 $ 6 $ 5 $ 4 1. Included in “Cost of sales” in the consolidated statements of income.
Schedule of Expected Amortization Expense	Total estimated amortization expense for the next five fiscal years is as follows: Estimated Amortization Expense for Next Five Years In millions 2019 $ 7 2020 $ 7 2021 $ 5 2022 $ 4 2023 $ 2

NOTES PAYABLE AND LONG-TERM D_2

NOTES PAYABLE AND LONG-TERM DEBT (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Schedule of Short-term Debt	Notes Payable at Dec 31 In millions 2018 2017 Notes payable to banks and other lenders $ 1 $ — Notes payable to related companies 28 28 Total notes payable $ 29 $ 28 Year-end average interest rates 3.27 % 2.56 %
Schedule of Long-term Debt Instruments	Long-Term Debt at Dec 31 2018 Average Rate 2018 2017 Average Rate 2017 In millions Promissory notes and debentures: Debentures due 2023 7.875 % $ 175 7.875 % $ 175 Debentures due 2025 6.79 % 12 6.79 % 12 Debentures due 2025 7.50 % 150 7.50 % 150 Debentures due 2096 7.75 % 135 7.75 % 135 Capital lease obligations 7 8 Unamortized debt discount and issuance costs (5 ) (5 ) Long-term debt due within one year (1 ) (1 ) Total long-term debt $ 473 $ 474
Schedule of Maturities of Long-term Debt	Maturities of Long-Term Debt for Next Five Years at Dec 31, 2018 In millions 2019 $ 1 2020 $ 1 2021 $ 1 2022 $ 1 2023 $ 176

COMMITMENTS AND CONTINGENT LI_2

COMMITMENTS AND CONTINGENT LIABILITIES (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Environmental Loss Contingency Disclosure	The following table summarizes the activity in the Corporation's accrued obligations for environmental matters for the years ended December 31, 2018 and 2017 : Accrued Liability for Environmental Matters In millions 2018 2017 Balance at Jan 1 $ 114 $ 145 Accrual adjustment 38 36 Payments against reserve (57 ) (68 ) Foreign currency impact (1 ) 1 Balance at Dec 31 $ 94 $ 114
Schedule of Future Minimum Rental Payments for Operating Leases	The Corporation has leases primarily for facilities and distribution equipment. The future minimum rental payments under leases with remaining noncancelable terms in excess of one year are as follows: Minimum Lease Commitments at Dec 31, 2018 In millions 2019 $ 18 2020 16 2021 14 2022 13 2023 13 2024 and thereafter 37 Total $ 111

ACCUMULATED OTHER COMPREHENSI_2

ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)	12 Months Ended
	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule of Accumulated Other Comprehensive Loss	The following table summarizes the changes and after-tax balances of each component of accumulated other comprehensive loss ("AOCL") for the years ended December 31, 2018 , 2017 and 2016 : Accumulated Other Comprehensive Loss Cumulative Translation Adj Pension and Other Postretire Benefits Total Accum Other Comp Loss In millions 2016 Balance at Jan 1, 2016 $ (61 ) $ (1,167 ) $ (1,228 ) Other comprehensive loss before reclassifications (1 ) (133 ) (134 ) Amounts reclassified from AOCL — 42 42 Net other comprehensive loss (1 ) (91 ) (92 ) Balance at Dec 31, 2016 $ (62 ) $ (1,258 ) $ (1,320 ) 2017 Other comprehensive loss before reclassifications — (83 ) (83 ) Amounts reclassified from AOCL 3 48 51 Net other comprehensive income (loss) 3 (35 ) (32 ) Balance at Dec 31, 2017 $ (59 ) $ (1,293 ) $ (1,352 ) 2018 Other comprehensive income (loss) before reclassifications 2 (22 ) (20 ) Amounts reclassified from AOCL — 65 65 Net other comprehensive income 2 43 45 Reclassification of stranded tax effects 1 — (254 ) (254 ) Balance at Dec 31, 2018 $ (57 ) $ (1,504 ) $ (1,561 ) 1. Amounts reclassified to retained earnings as a result of the adoption of ASU 2018-02. See Notes 1 and 2 for additional information. The tax effects on the net activity related to each component of other comprehensive income (loss) for the years ended December 31, 2018 , 2017 and 2016 were as follows: Tax Benefit (Expense) 1 In millions 2018 2017 2016 Pension and other postretirement benefit plans $ (13 ) $ (3 ) $ 54 1. Prior period amounts were updated to conform with the current year presentation.
Reclassification out of Accumulated Other Comprehensive Income	A summary of the reclassifications out of AOCL for the years ended December 31, 2018 , 2017 and 2016 is provided as follows: Reclassifications Out of AOCL Consolidated Statements of Income Classification 2018 2017 2016 In millions Cumulative translation adjustments $ — $ 3 $ — See (1) below Pension and other postretirement benefit plans 85 76 67 See (2) below Tax benefit (20 ) (28 ) (25 ) See (3) below After tax 65 48 42 Total reclassifications for the period, after-tax $ 65 $ 51 $ 42 1. "Sundry income (expense) - net." 2. Included in the computation of net periodic benefit cost of the Corporation's defined benefit pension and other postretirement benefit plans. See Note 15 for additional information. 3. "Provision (Credit) for income taxes."

PENSION PLANS AND OTHER POSTR_2

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Tables)	12 Months Ended
	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan	Summarized information on the Corporation's pension and other postretirement benefit plans is as follows: Change in Projected Benefit Obligations, Plan Assets and Funded Status for all Plans Defined Benefit Pension Plans Other Postretirement Benefits In millions 2018 2017 2018 2017 Change in projected benefit obligations: Benefit obligation at beginning of year $ 4,150 $ 4,025 $ 224 $ 264 Service cost 39 38 1 1 Interest cost 128 129 6 8 Actuarial changes in assumptions and experience (249 ) 241 (2 ) (23 ) Benefits paid (278 ) (281 ) (14 ) (26 ) Other (4 ) (2 ) — — Benefit obligation at end of year $ 3,786 $ 4,150 $ 215 $ 224 Change in plan assets: Fair value of plan assets at beginning of year $ 3,307 $ 3,097 $ — $ — Actual return on plan assets (62 ) 331 — — Employer contributions 42 162 — — Asset transfers (4 ) (2 ) — — Benefits paid (278 ) (281 ) — — Fair value of plan assets at end of year $ 3,005 $ 3,307 $ — $ — Funded status at end of year $ (781 ) $ (843 ) $ (215 ) $ (224 ) Net amounts recognized in the consolidated balance sheets at Dec 31: Accrued and other current liabilities $ (2 ) $ (2 ) $ (19 ) $ (15 ) Pension and other postretirement benefits - noncurrent (779 ) (841 ) (196 ) (209 ) Net amount recognized $ (781 ) $ (843 ) $ (215 ) $ (224 ) Pretax amounts recognized in accumulated other comprehensive loss at Dec 31: Net loss (gain) $ 2,019 $ 2,083 $ (79 ) $ (86 ) Prior service credit (11 ) (12 ) — — Pretax balance in accumulated other comprehensive loss at end of year $ 2,008 $ 2,071 $ (79 ) $ (86 )
Schedule of Projected Benefit Obligations in Excess of Fair Value of Plan Assets	Pension Plans with Projected Benefit Obligations in Excess of Plan Assets at Dec 31 2018 2017 In millions Projected benefit obligations $ 3,786 $ 4,150 Fair value of plan assets $ 3,005 $ 3,307
Schedule of Net Benefit Costs	Net Periodic Benefit Cost for All Plans for the Year Ended Dec 31 Defined Benefit Pension Plans Other Postretirement Benefits In millions 2018 2017 2016 2018 2017 2016 Net Periodic Benefit Cost: Service cost $ 39 $ 38 $ 39 $ 1 $ 1 $ 1 Interest cost 128 129 131 6 8 8 Expected return on plan assets (218 ) (221 ) (217 ) — — — Amortization of prior service credit (1 ) (1 ) (1 ) — — — Amortization of net (gain) loss 95 83 75 (9 ) (6 ) (7 ) Net periodic benefit cost $ 43 $ 28 $ 27 $ (2 ) $ 3 $ 2 Changes in plan assets and benefit obligations recognized in other comprehensive (income) loss: Net (gain) loss $ 31 $ 131 $ 208 $ (2 ) $ (23 ) $ 4 Amortization of prior service credit 1 1 1 — — — Amortization of net gain (loss) (95 ) (83 ) (75 ) 9 6 7 Total recognized in other comprehensive (income) loss $ (63 ) $ 49 $ 134 $ 7 $ (17 ) $ 11 Total recognized in net periodic benefit cost and other comprehensive (income) loss $ (20 ) $ 77 $ 161 $ 5 $ (14 ) $ 13
Schedule of Expected Benefit Payments	The estimated future benefit payments, reflecting expected future service, as appropriate, are presented in the following table: Estimated Future Benefit Payments at Dec 31, 2018 Defined Benefit Pension Plans Other Postretirement Benefits In millions 2019 $ 277 $ 19 2020 276 19 2021 275 20 2022 274 20 2023 271 19 2024 through 2028 1,293 76 Total $ 2,666 $ 173
Schedule of Allocation of Plan Assets	The weighted-average target allocation for plan assets of the Corporation's pension plans is summarized as follows: Target Allocation for Plan Assets at Dec 31, 2018 Target Allocation Asset Category Equity securities 23 % Fixed income securities 45 Alternative investments 27 Other 5 Total 100 %
Schedule of Defined Benefit Plans Disclosures	The following table summarizes the bases used to measure the Corporation’s pension plan assets at fair value for the years ended December 31, 2018 and 2017 : Basis of Fair Value Measurements Dec 31, 2018 Dec 31, 2017 In millions Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Cash and cash equivalents $ 189 $ 189 $ — $ — $ 193 $ 153 $ 40 $ — Equity securities: U.S. equity securities $ 277 $ 275 $ 2 $ — $ 374 $ 357 $ 17 $ — Non - U.S. equity securities 321 269 46 6 472 404 61 7 Total equity securities $ 598 $ 544 $ 48 $ 6 $ 846 $ 761 $ 78 $ 7 Fixed income securities: Debt - government-issued $ 812 $ 8 $ 804 $ — $ 873 $ — $ 873 $ — Debt - corporate-issued 413 11 402 — 515 — 515 — Debt - asset-backed 30 — 30 — 24 — 24 — Total fixed income securities $ 1,255 $ 19 $ 1,236 $ — $ 1,412 $ — $ 1,412 $ — Alternative investments: 1 Derivatives - asset position $ 12 $ — $ 12 $ — $ 6 $ — $ 6 $ — Derivatives - liability position — — — — (32 ) — (32 ) — Total alternative investments $ 12 $ — $ 12 $ — $ (26 ) $ — $ (26 ) $ — Other investments $ — $ — $ — $ — $ (6 ) $ — $ (6 ) $ — Subtotal $ 2,054 $ 752 $ 1,296 $ 6 $ 2,419 $ 914 $ 1,498 $ 7 Investments measured at net asset value: 1 Hedge funds $ 287 $ 292 Private market securities 335 237 Real estate 327 360 Total investments measured at net asset value $ 949 $ 889 Items to reconcile to fair value of plan assets: Pension trust receivables 2 $ 2 $ 2 Pension trust payables 3 — (3 ) Total $ 3,005 $ 3,307 1. The Corporation reviewed its fair value techniques and elected to present assets valued at net asset value per share as a practical expedient outside of the fair value hierarchy. The assets are presented as "Investments measured at net asset value." Prior period amounts were updated to conform with the current year presentation. 2. Primarily receivables for investment securities sold. 3. Primarily payables for investment securities purchased.
Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Assumptions Used	The weighted-average assumptions used to determine pension plan obligations and net periodic benefit costs are provided below: Pension Plan Assumptions Benefit Obligations at Dec 31 Net Periodic Costs for the Year Ended 2018 2017 2018 2017 2016 Discount rate 4.32 % 3.59 % 3.59 % 4.00 % 4.26 % Interest crediting rate for applicable benefits 4.50 % 4.50 % 4.50 % 4.50 % 4.50 % Rate of compensation increase 4.25 % 4.25 % 4.25 % 4.25 % 4.50 % Expected return on plan assets — — 6.80 % 6.80 % 6.80 %
Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets	Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets at Dec 31 In millions 2018 2017 Accumulated benefit obligations $ 3,762 $ 4,120 Fair value of plan assets $ 3,005 $ 3,307
Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets	The following table summarizes the changes in fair value of Level 3 pension plan assets for the years ended December 31, 2018 and 2017 : Fair Value Measurement of Level 3 Pension Plan Assets Equity Securities Alternative Investments Other Investments Total In millions Balance at Jan 1, 2017, as previously reported $ 6 $ 724 $ 19 $ 749 Reclassification of investments measured at net asset value 1 — (713 ) (19 ) (732 ) Balance at Jan 1, 2017, as restated $ 6 $ 11 $ — $ 17 Actual return on plan assets: Relating to assets held at Dec 31, 2017 — (2 ) — (2 ) Purchases, sales and settlements 1 (9 ) — (8 ) Balance at Dec 31, 2017 $ 7 $ — $ — $ 7 Actual return on plan assets: Relating to assets held at Dec 31, 2018 (1 ) — — (1 ) Balance at Dec 31, 2018 $ 6 $ — $ — $ 6 1. The Corporation reviewed its fair value technique and elected to present assets valued at at net asset value per share as a practical expedient outside of the fair value hierarchy, including those classified as Level 3 pension plan assets. The assets are presented as "Investments measured at net asset value."
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Assumptions Used	The weighted-average assumptions used to determine other postretirement benefit obligations and net periodic benefit costs for the plan are provided in the following table: Plan Assumptions for Other Postretirement Benefits Benefit Obligations at Dec 31 Net Periodic Costs for the Year Ended 2018 2017 2018 2017 2016 Discount rate 4.23 % 3.51 % 3.51 % 3.88 % 4.08 % Health care cost trend rate assumed for next year 6.50 % 6.75 % 6.75 % 7.00 % 7.25 % Rate to which the cost trend rate is assumed to decline (the ultimate health care cost trend rate) 5.00 % 5.00 % 5.00 % 5.00 % 5.00 % Year that the rate reaches the ultimate health care cost trend rate 2025 2025 2025 2025 2025

FAIR VALUE MEASUREMENTS (Tables

FAIR VALUE MEASUREMENTS (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following table summarizes the fair value of the Corporation's financial instruments at December 31, 2018 and 2017 : Fair Value of Financial Instruments 2018 2017 In millions Cost Gain Loss Fair Value Cost Gain Loss Fair Value Cash equivalents 1 $ 10 $ — $ — $ 10 $ 9 $ — $ — $ 9 Long-term debt including debt due within one year $ (474 ) $ — $ (67 ) $ (541 ) $ (475 ) $ — $ (129 ) $ (604 ) 1. Money market fund is included in "Cash and cash equivalents" in the consolidated balance sheets and held at amortized cost, which approximates fair value.

BUSINESS AND GEOGRAPHIC AREAS (

BUSINESS AND GEOGRAPHIC AREAS (Tables)	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas	Sales are attributed to geographic regions based on customer location; long-lived assets are attributed to geographic regions based on asset location. Sales to external customers and long-lived assets by geographic region were as follows: Geographic Region Information United States Asia Pacific Rest of World Total In millions 2018 Sales to external customers 1 $ 124 $ 2 $ 10 $ 136 Long-lived assets $ 1,413 $ 10 $ 25 $ 1,448 2017 Sales to external customers 1 $ 110 $ 21 $ 12 $ 143 Long-lived assets $ 1,341 $ 9 $ 29 $ 1,379 2016 Sales to external customers 1 $ 95 $ 3 $ 10 $ 108 Long-lived assets $ 1,353 $ 10 $ 31 $ 1,394 1. Of total sales to external customers, sales in Malaysia were approximately 1 percent in 2018, 15 percent in 2017 and 3 percent in 2016, and are included in Asia Pacific.

SUMMARY OF SIGNIFICANT ACCOUN_4

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2018
Cost of sales	$ 4,047	$ 4,184	$ 3,724
Sundry income (expense) - net	(34)	(3)	27
Retained earnings	$ 3,338	2,582
Accounting Standards Update 2018-02 [Member]
Retained earnings				$ 254
Previously Reported
Cost of sales		4,176	3,713
Sundry income (expense) - net		$ (11)	$ 16

RECENT ACCOUNTING GUIDANCE (Det

RECENT ACCOUNTING GUIDANCE (Details) - Subsequent Event [Member] - Accounting Standards Update 2016-02 [Member] $ in Millions	Jan. 01, 2019USD ($)
Minimum [Member]
Change in Accounting Estimate [Line Items]
Operating lease, right-of-use asset	$ 100
Operating lease, liability	90
Maximum [Member]
Change in Accounting Estimate [Line Items]
Operating lease, right-of-use asset	140
Operating lease, liability	$ 130

REVENUE (Details)

REVENUE (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Percentage of revenue from product sales	99.00%	99.00%	99.00%
Percentage of revenue from licensing of patents and technology	1.00%	1.00%	1.00%
Accrued and Other Current Liabilities [Member]
Disaggregation of Revenue [Line Items]
Contract liability	$ 41	$ 43
Maximum [Member]
Disaggregation of Revenue [Line Items]
Contract term	22 years

RESTRUCTURING AND ASSET RELAT_2

RESTRUCTURING AND ASSET RELATED CHARGES - NET (Details) $ in Millions	3 Months Ended					12 Months Ended
	Dec. 31, 2017USD ($)	Sep. 30, 2017USD ($)	Jun. 30, 2017USD ($)	Dec. 31, 2016USD ($)employees	Jun. 30, 2016USD ($)employees	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring Charges						$ 3	$ 74	$ 4
2017 Restructuring [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 2	$ 8				3
Payments for Restructuring						(9)	(2)
Restructuring Reserve	8					$ 4	8
2017 Restructuring [Member] | Impairment of Long-Lived Assets and Other Assets [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges	62
2Q16 Restructuring [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 0						$ 0
Severance Costs			$ 2	$ 2	$ 1
Restructuring and Related Cost, Expected Number of Positions Eliminated | employees				16	5

SUPPLEMENTARY INFORMATION (Sund

SUPPLEMENTARY INFORMATION (Sundry Income, Net) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Supplementary Information [Line Items]
Net gain on sales of property	$ 0	$ 23	$ 50
Interest income	28	20	14
Non-operating pension and other postretirement benefit plan net credits (costs)	(1)	8	11
Net gain on sale of a nonconsolidated affiliate	0	4	0
Foreign exchange gain	0	0	1
Other - net	(9)	(3)	0
Total sundry income (expense) - net	(34)	(3)	27
Administrative and overhead fees [Member] | The Dow Chemical Company [Member]
Supplementary Information [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	(30)	(33)	(27)
Net Commission Expense [Member]
Supplementary Information [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ (22)	$ (22)	$ (22)

SUPPLEMENTARY INFORMATION (Accr

SUPPLEMENTARY INFORMATION (Accrued and other current liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Accrued and other current liabilities	$ 163	$ 174
Accrued and Other Current Liabilities [Member]
Accrued Environmental Loss Contingencies, Current	$ 58	$ 67

INCOME TAXES (Schedule of Domes

INCOME TAXES (Schedule of Domestic and Foreign Components of Income Before Income Taxes and Tax Reconciliation) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Change in Tax Rate, Provisional Income Tax Expense(Benefit)	$ 2	$ (248)		$ (250)
Tax Cuts and Jobs Act of 2017, Indirect Impact on Inventory, Provisional Income Tax Expense			$ (2)
Geographic Allocation of Income and Provision (Credit) for Income Taxes [Abstract]
Income (Loss) Before Income Taxes, Domestic			1,305	856	$ 49
Income (Loss) Before Income Taxes, Foreign			(3)	(6)	8
Income before income taxes			1,302	850	57
Current Federal Tax Expense (Benefit)			166	226	265
Current State and Local Tax Expense (Benefit)			6	2	(3)
Current Foreign Tax Expense (Benefit)			40	3	3
Current Income Tax Expense (Benefit)			212	231	265
Deferred Federal Income Tax Expense (Benefit)			27	392	(285)
Deferred State and Local Income Tax Expense (Benefit)			8	22	(12)
Deferred Income Tax Expense (Benefit)			35	414	(297)
Provision (Credit) for income taxes			247	645	(32)
Net Income Attributable to Union Carbide Corporation			$ 1,055	$ 205	$ 89

INCOME TAXES (Reconciliation to

INCOME TAXES (Reconciliation to U.S. Statutory Rate) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Statutory U.S. federal income tax rate	21.00%	35.00%	35.00%
U.S. manufacturing deductions	(0.00%)	(0.00%)	(14.00%)
Unrecognized tax benefits	(0.30%)	(0.40%)	(45.60%)
Foreign Derived Intangible Income (FDII) deduction	(2.20%)	0.00%	0.00%
Federal tax accrual adjustments	(0.30%)	(1.10%)	(12.30%)
Impact of U.S. tax reform	(0.20%)	29.40%	0.00%
Deferred intercompany gain	0.00%	11.40%	0.00%
State and local tax impact	1.00%	2.20%	(24.60%)
Other - net	0.00%	(0.60%)	5.40%
Effective Tax Rate	19.00%	75.90%	(56.10%)

INCOME TAXES (Schedule of Defer

INCOME TAXES (Schedule of Deferred Tax Balances) (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	$ 97
Deferred Tax Assets, Property, Plant and Equipment		$ 0	$ 0
Deferred Tax Assets, Operating Loss and Tax Credit Carryforwards		42	47
Postretirement benefit obligations, Deferred Tax Assets		234	251
Other accruals and reserves, Deferred Tax Assets		326	349
Inventory, Deferred Tax Assets		8	8
Other - net, deferred tax assets		11	9
Subtotal, deferred tax assets		(621)	(664)
Valuation allowances, deferred tax assets		(19)	(19)
Total, deferred tax assets		602	645
Property, Deferred Tax Liabilities		129	132
Tax loss and credit carryforwards, Deferred Tax Liabilities,		0	0
Postretirement benefit obligations, Deferred Tax Liabilities		0	0
Other accruals and reserves, Deferred Tax Liabilities		8	1
Inventory, deferred tax liabilities		0	0
Other - net, deferred tax liabilities		2	1
Total, deferred tax liabilities		139	134
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries		$ 35	$ 9

INCOME TAXES (Summary of Operat

INCOME TAXES (Summary of Operating Loss Carryforwards) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Deferred Tax Assets, Operating Loss Carryforwards	$ 36	$ 41
Deferred Tax Assets, Tax Credit Carryforwards	6	6
Expiring Within Five Years [Member]
Deferred Tax Assets, Operating Loss Carryforwards	31	29
Deferred Tax Assets, Tax Credit Carryforwards	0	1
Expiring After Five Years or Having Indefinite Expiration [Member] [Member]
Deferred Tax Assets, Operating Loss Carryforwards	5	12
Deferred Tax Assets, Tax Credit Carryforwards	$ 6	$ 5

INCOME TAXES (Uncertain Tax Pos

INCOME TAXES (Uncertain Tax Position) (Details) - USD ($) $ in Millions	3 Months Ended			12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of Total Gross Unrecognized Tax Benefits [Roll Forward]
Gross unrecognized tax benefits, beginning balance		$ 1		$ 1	$ 1	$ 68
Increases related to positions taken on items from prior years				0	0	139
Settlement of uncertain tax positions with tax authorities			$ (67)	0	0	(206)
Gross unrecognized tax benefits, ending balance			1	1	1	1
Total unrecognized tax benefits that, if recognized, would impact the effective tax rate			1	1	1	1
Total amount of interest and penalties (benefit) recognized in Provision (Credit) for income taxes				$ (5)	$ (6)	$ (36)
Tax Adjustments, Settlements, and Unusual Provisions			$ 206
Foreign Tax Authority [Member]
Reconciliation of Total Gross Unrecognized Tax Benefits [Roll Forward]
Increase (Decrease) in Income Taxes Payable	$ 40	$ 40

INCOME TAXES (Tax Years Subject

INCOME TAXES (Tax Years Subject to Examination by Major Tax Jurisdiction) (Details)	12 Months Ended
	Dec. 31, 2018
Federal Income Tax [Member]
Earliest open year	2,004
State and Local Income Tax [Member]
Earliest open year	2,004

INVENTORIES (Schedule of Invent

INVENTORIES (Schedule of Inventories) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Finished goods	$ 264	$ 222
Work in process	45	47
Raw materials	45	48
Supplies	85	73
Total	439	390
Adjustment of inventories to a LIFO basis	(135)	(112)
Total inventories	$ 304	$ 278
Percentage of LIFO Inventory	60.00%	70.00%

PROPERTY (Schedule of Property)

PROPERTY (Schedule of Property) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property	$ 7,430	$ 7,309
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property	$ 285	283
Land and Land Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life	0 years
Land and Land Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life	25 years
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property	$ 412	402
Buildings [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life	5 years
Buildings [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life	50 years
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property	$ 6,205	6,049
Machinery and equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life	3 years
Machinery and equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life	20 years
Other property [Member]
Property, Plant and Equipment [Line Items]
Property	$ 338	325
Other property [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life	3 years
Other property [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life	30 years
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property	$ 190	$ 250

PROPERTY (Schedule of Other Ite

PROPERTY (Schedule of Other Items Related to Property) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 179	$ 176	$ 166
Capitalized interest	$ 7	$ 10	$ 13

INVESTMENTS IN RELATED COMPAN_3

INVESTMENTS IN RELATED COMPANIES (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Schedule of Investments [Line Items]
Investments in related companies	$ 639	$ 639
Dow International Holdings Company [Member]
Schedule of Investments [Line Items]
Ownership Interest Percentage, Related Company	12.00%	12.00%
Cost Method Investments	$ 633	$ 633
Dow Quimica Mexicana S.A. de C.V. [Member]
Schedule of Investments [Line Items]
Ownership Interest Percentage, Related Company	15.00%	15.00%
Cost Method Investments	$ 5	$ 5
Other [Member]
Schedule of Investments [Line Items]
Ownership Interest Percentage, Related Company	0.00%	0.00%
Cost Method Investments	$ 1	$ 1

INTANGIBLE ASSETS (Schedule of

INTANGIBLE ASSETS (Schedule of Intangible Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 112	$ 107
Finite-Lived Intangible Assets, Accumulated Amortization	(87)	(82)
Finite-Lived Intangible Assets, Net	25	25
Licenses and Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	33	33
Finite-Lived Intangible Assets, Accumulated Amortization	(33)	(33)
Finite-Lived Intangible Assets, Net	0	0
Software [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	79	74
Finite-Lived Intangible Assets, Accumulated Amortization	(54)	(49)
Finite-Lived Intangible Assets, Net	$ 25	$ 25

INTANGIBLE ASSETS (Schedule o_2

INTANGIBLE ASSETS (Schedule of Amortization Expense of Intangible Assets) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Amortization Expense, software, included in 'cost of sales'	[1]	$ 6	$ 5	$ 4
[1]	Included in “Cost of sales” in the consolidated statements of income.

INTANGIBLE ASSETS (Schedule o_3

INTANGIBLE ASSETS (Schedule of Future Amortization Expense of Intangible Assets) (Details) $ in Millions	Dec. 31, 2018USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2,019	$ 7
2,020	7
2,021	5
2,022	4
2,023	$ 2

NOTES PAYABLE AND LONG-TERM D_3

NOTES PAYABLE AND LONG-TERM DEBT (Schedule of Notes Payable) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Notes payable to banks and other lenders	$ 1	$ 0
Notes payable to related companies	28	28
Total notes payable	$ 29	$ 28
Year-end average interest rates	3.27%	2.56%

NOTES PAYABLE AND LONG-TERM D_4

NOTES PAYABLE AND LONG-TERM DEBT (Schedule of Long-Term Debt) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Long-Term Debt	$ 473	$ 474
Unamortized debt discount and issuance costs	(5)	(5)
Long-term debt due within one year	$ (1)	$ (1)
Final Maturity 2023 [Member]
Debt Instrument [Line Items]
Average Interest Rate in Period	7.875%	7.875%
Long-Term Debt	$ 175	$ 175
Final Maturity 2025 (a) [Member]
Debt Instrument [Line Items]
Average Interest Rate in Period	6.79%	6.79%
Long-Term Debt	$ 12	$ 12
Final Maturity 2025 (b) [Member]
Debt Instrument [Line Items]
Average Interest Rate in Period	7.50%	7.50%
Long-Term Debt	$ 150	$ 150
Final Maturity 2096 [Member]
Debt Instrument [Line Items]
Average Interest Rate in Period	7.75%	7.75%
Long-Term Debt	$ 135	$ 135
Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Long-Term Debt	$ 7	$ 8

NOTES PAYABLE AND LONG-TERM D_5

NOTES PAYABLE AND LONG-TERM DEBT (Schedule of Annual Installments) (Details) $ in Millions	Dec. 31, 2018USD ($)
Long-term Debt, Fiscal Year Maturity [Abstract]
2,019	$ 1
2,020	1
2,021	1
2,022	1
2,023	$ 176

COMMITMENTS AND CONTINGENT LI_3

COMMITMENTS AND CONTINGENT LIABILITIES (Environmental Matters) (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at Jan 1	$ 114	$ 145
Accrual adjustment	38	36
Payments against reserve	(57)	(68)
Foreign currency impact	(1)	1
Balance at Dec 31	94	114	$ 145
Environmental remediation expense	38	36	122
Capital expenditures for environmental protection	9	9	$ 10
Accrual For Environmental Loss Contingencies Superfund Sites [Member]
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at Jan 1	19
Balance at Dec 31	$ 16	$ 19

COMMITMENTS AND CONTINGENT LI_4

COMMITMENTS AND CONTINGENT LIABILITIES (Asbestos Related Matters) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2002
Loss Contingencies [Line Items]
Liability For Asbestos Claims Gross					$ 2,200
Loss Contingency, Range of Possible Loss, Minimum	$ 502			$ 502
Loss Contingency, Range of Possible Loss, Maximum	565			565
Asbestos Related Charges Credit		$ 0	$ 0	1,113
Percentage of Recorded Asbests Liability Related to Pending Claims		16.00%	16.00%
Percentage of Recorded Asbestos Liability Related to Future Claims		84.00%	84.00%
Asbestos Related Defense Cost Contingency, Range of Possible Expense, Minimum	1,009			1,009
Asbestos Related Defense Cost Contingency, Range of Possible Expense, Maximum	1,081			$ 1,081
Liability for Asbestos Claims and Defense Costs Gross		$ 1,260	$ 1,369
Estimated Insurance Recoveries		$ 10	$ 37
Asbestos liability for pending and future claims
Loss Contingencies [Line Items]
Asbestos Related Charges Credit	104
Asbestos liability for defense and processing costs
Loss Contingencies [Line Items]
Asbestos Related Charges Credit	$ 1,009

COMMITMENTS AND CONTINGENT LI_5

COMMITMENTS AND CONTINGENT LIABILITIES (Minimum Lease Commitments) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Leases, Future Minimum Payments Receivable [Abstract]
2,019	$ 18
2,020	16
2,021	14
2,022	13
2,023	13
2024 and thereafter	37
Total	111
Rent expense under leases	$ 31	$ 32	$ 28

ACCUMULATED OTHER COMPREHENSI_3

ACCUMULATED OTHER COMPREHENSIVE LOSS (Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 1,368	$ 1,798	$ 2,301
Net other comprehensive income	45	(32)	(92)
Ending balance	1,915	1,368	1,798
Pension and other postretirement benefit plans	45	(32)	(92)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(59)	(62)	(61)
Other comprehensive income (loss) before reclassifications	2	0	(1)
Amounts reclassified from AOCL	0	3	0
Net other comprehensive income	2	3	(1)
Reclassification of stranded tax effects 1	0
Ending balance	(57)	(59)	(62)
Pension and Other Postretirement Benefits
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(1,293)	(1,258)	(1,167)
Other comprehensive income (loss) before reclassifications	(22)	(83)	(133)
Amounts reclassified from AOCL	65	48	42
Net other comprehensive income	43	(35)	(91)
Reclassification of stranded tax effects 1	(254)
Ending balance	(1,504)	(1,293)	(1,258)
Pension and other postretirement benefit plans	(13)	(3)	54
Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(1,352)	(1,320)	(1,228)
Other comprehensive income (loss) before reclassifications	(20)	(83)	(134)
Amounts reclassified from AOCL	65	51	42
Net other comprehensive income	45	(32)	(92)
Reclassification of stranded tax effects 1	(254)
Ending balance	(1,561)	(1,352)	(1,320)
Pension and other postretirement benefit plans	$ 45	$ (32)	$ (92)

ACCUMULATED OTHER COMPREHENSI_4

ACCUMULATED OTHER COMPREHENSIVE LOSS (Reclassifications Out of AOCL) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	$ 65	$ 51	$ 42
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0	(3)	0
Accumulated Foreign Currency Adjustment Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Nonoperating Income (Expense)	0	3	0
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(65)	(48)	(42)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	85	76	67
Reclassification from AOCI, Current Period, Tax	(20)	(28)	(25)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	$ 65	$ 48	$ 42

PENSION PLANS AND OTHER POSTR_3

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Pension Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Payment for Pension Benefits	$ 42
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 2
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.32%	3.59%	4.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.59%	4.00%	4.26%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Interest Crediting Rate for Applicable Benefits	4.50%	4.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Interest Crediting Rate for Applicable Benefits	4.50%	4.50%	4.50%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	4.25%	4.25%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	4.25%	4.25%	4.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.80%	6.80%	6.80%

PENSION PLANS AND OTHER POSTR_4

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Other Postretirement Benefits) (Details) - Other Postretirement Benefits Plan [Member]	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.23%	3.51%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.51%	3.88%	4.08%
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year	6.50%	6.75%
Defined Benefit Plan, Health Care Cost Trend Rate Assumed to Calculate Net Periodic Benefit Cost, Next Fiscal Year	6.75%	7.00%	7.25%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	5.00%	5.00%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate To Calculate Net Period Benefit Cost	5.00%	5.00%	5.00%
Defined Benefit Plan, Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate	2,025	2,025	2,025

PENSION PLANS AND OTHER POSTR_5

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Change in Projected Benefit Obligation, Plan Assets and Funded Status) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 3,005	$ 3,307
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation	3,786	4,150	$ 4,025
Defined Benefit Plan, Service Cost	39	38	39
Defined Benefit Plan, Interest Cost	128	129	131
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(249)	241
Defined Benefit Plan, Benefit Obligation, Benefits Paid	278	281
Defined Benefit Plan, Other Cost (Credit)	(4)	(2)
Defined Benefit Plan, Plan Assets, Amount	3,005	3,307	$ 3,097
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	(62)	331
Defined Benefit Plan, Plan Assets, Contributions by Employer	42	162
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Assets Transferred to (from) Plan	(4)	(2)
Defined Benefit Plan, Plan Assets, Benefits Paid	278	281
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(781)	(843)
Liability, Defined Benefit Plan, Current	2	2
Liability, Defined Benefit Plan, Noncurrent	779	841
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	(781)	(843)
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax	(2,019)	(2,083)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax	(11)	(12)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	$ 2,008	$ 2,071
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.32%	3.59%	4.00%
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation	$ 215	$ 224	$ 264
Defined Benefit Plan, Service Cost	1	1	1
Defined Benefit Plan, Interest Cost	6	8	8
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(2)	(23)
Defined Benefit Plan, Benefit Obligation, Benefits Paid	14	26
Defined Benefit Plan, Other Cost (Credit)	0	0
Defined Benefit Plan, Plan Assets, Amount	0	0	$ 0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	0	0
Defined Benefit Plan, Plan Assets, Contributions by Employer	0	0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Assets Transferred to (from) Plan	0	0
Defined Benefit Plan, Plan Assets, Benefits Paid	0	0
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(215)	(224)
Liability, Defined Benefit Plan, Current	19	15
Liability, Defined Benefit Plan, Noncurrent	196	209
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	(215)	(224)
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax	79	86
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax	0	0
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	$ (79)	$ (86)
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.23%	3.51%

PENSION PLANS AND OTHER POSTR_6

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Accumulated and Projected Benefit Obligations in Excess of Plan Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation	$ 3,762	$ 4,120
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Plan Assets	3,005	3,307
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Asses, Projected Benefit Obligation	3,786	4,150
Defied Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Fair Value of Plan Assets	3,005	3,307
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets for Plan Benefits, Defined Benefit Plan	$ 3,800	$ 4,100

PENSION PLANS AND OTHER POSTR_7

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 1	$ (8)	$ (11)
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	39	38	39
Defined Benefit Plan, Interest Cost	128	129	131
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	218	221	217
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(1)	(1)	(1)
Defined Benefit Plan, Amortization of Gain (Loss)	(95)	(83)	(75)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	43	28	27
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Reclassification Adjustment, before Tax	(31)	(131)	(208)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	(1)	(1)	(1)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	95	83	75
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	(63)	49	134
Total recognized in net periodic benefit cost and other comprehensive loss or income	(20)	77	161
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	1	1	1
Defined Benefit Plan, Interest Cost	6	8	8
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	0	0	0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0	0
Defined Benefit Plan, Amortization of Gain (Loss)	9	6	7
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(2)	3	2
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Reclassification Adjustment, before Tax	2	23	(4)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	0	0	0
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	(9)	(6)	(7)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	7	(17)	11
Total recognized in net periodic benefit cost and other comprehensive loss or income	$ 5	$ (14)	$ 13

PENSION AND OTHER POSTRETIREMEN

PENSION AND OTHER POSTRETIREMENT BENEFITS (Estimated Future Benefit Payments) (Details) $ in Millions	Dec. 31, 2018USD ($)
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 277
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	276
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	275
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	274
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	271
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	1,293
Total estimated future benefit payments	2,666
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	19
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	19
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	20
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	20
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	19
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	76
Total estimated future benefit payments	$ 173

PENSION PLANS AND OTHER POSTR_8

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Plan Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 3,005	$ 3,307
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	100.00%
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	23.00%
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	45.00%
Alternative Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	27.00%
Other Pension Plan Asset Category [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	5.00%
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 3,005	3,307	$ 3,097
Pension Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	598	846
Pension Plan [Member] | Alternative Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 12	$ (26)
Defined Benefit Plan Liability, Annuity Coverage [Member]
Defined Benefit Plan Disclosure [Line Items]
Concentration Risk, Percentage	35.00%

PENSION PLANS AND OTHER POSTR_9

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Basis of Fair Value Measurements) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 3,005	$ 3,307
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets	949	889
Defined Benefit Plan, Fair Value of Plan Assets, Reconciling Items, Pension Trust Receivables	2	2
Defined Benefit Plan, Fair Value of Plan Assets, Reconciling Items, Pension Trust Payables	0	3
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	3,005	3,307	$ 3,097
Defined Benefit Plan, Fair Value of Plan Assets Subtotal	2,054	2,419
Pension Plan [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets Subtotal	752	914
Pension Plan [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets Subtotal	1,296	1,498
Pension Plan [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	6	7	17
Defined Benefit Plan, Fair Value of Plan Assets Subtotal	6	7
Pension Plan [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	189	193
Pension Plan [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	189	153
Pension Plan [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	40
Pension Plan [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Pension Plan [Member] | U.S. Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	277	374
Pension Plan [Member] | U.S. Equity [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	275	357
Pension Plan [Member] | U.S. Equity [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	2	17
Pension Plan [Member] | U.S. Equity [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Pension Plan [Member] | Non-U.S. Equity - Developed Countries [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	321	472
Pension Plan [Member] | Non-U.S. Equity - Developed Countries [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	269	404
Pension Plan [Member] | Non-U.S. Equity - Developed Countries [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	46	61
Pension Plan [Member] | Non-U.S. Equity - Developed Countries [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	6	7
Pension Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	598	846
Pension Plan [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	544	761
Pension Plan [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	48	78
Pension Plan [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	6	7	6
Pension Plan [Member] | US Treasury and Government [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	812	873
Pension Plan [Member] | US Treasury and Government [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	8	0
Pension Plan [Member] | US Treasury and Government [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	804	873
Pension Plan [Member] | US Treasury and Government [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Pension Plan [Member] | Corporate Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	413	515
Pension Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	11	0
Pension Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	402	515
Pension Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Pension Plan [Member] | Asset-backed Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	30	24
Pension Plan [Member] | Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Pension Plan [Member] | Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	30	24
Pension Plan [Member] | Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Pension Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	1,255	1,412
Pension Plan [Member] | Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	19	0
Pension Plan [Member] | Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	1,236	1,412
Pension Plan [Member] | Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Pension Plan [Member] | Derivative Financial Instruments, Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	12	6
Pension Plan [Member] | Derivative Financial Instruments, Assets [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Pension Plan [Member] | Derivative Financial Instruments, Assets [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	12	6
Pension Plan [Member] | Derivative Financial Instruments, Assets [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Pension Plan [Member] | Derivative Financial Instruments, Liabilities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	(32)
Pension Plan [Member] | Derivative Financial Instruments, Liabilities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Pension Plan [Member] | Derivative Financial Instruments, Liabilities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	(32)
Pension Plan [Member] | Derivative Financial Instruments, Liabilities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Pension Plan [Member] | Alternative Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	12	(26)
Pension Plan [Member] | Alternative Investments [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Pension Plan [Member] | Alternative Investments [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	12	(26)
Pension Plan [Member] | Alternative Investments [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0	$ 11
Pension Plan [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	(6)
Pension Plan [Member] | Other [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Pension Plan [Member] | Other [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	(6)
Pension Plan [Member] | Other [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Pension Plan [Member] | Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets	287	292
Pension Plan [Member] | Private Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets	335	237
Pension Plan [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets	$ 327	$ 360

PENSION PLANS AND OTHER POST_10

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Fair Value Measurement of Level 3 Pension Plan Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 3,005	$ 3,307
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	3,005	3,307	$ 3,097
Pension Plan [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	6	7	17
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Actual Return (Loss) on Plan Assets Still Held	(1)	(2)
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Purchase, Sale, and Settlement		(8)
Pension Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	598	846
Pension Plan [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	6	7	6
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Actual Return (Loss) on Plan Assets Still Held	(1)	0
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Purchase, Sale, and Settlement		1
Pension Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	1,255	1,412
Pension Plan [Member] | Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Pension Plan [Member] | Alternative Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	12	(26)
Pension Plan [Member] | Alternative Investments [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0	11
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Actual Return (Loss) on Plan Assets Still Held	0	(2)
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Purchase, Sale, and Settlement		(9)
Pension Plan [Member] | Other Plan Assets [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0	0
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Actual Return (Loss) on Plan Assets Still Held	$ 0	0
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Purchase, Sale, and Settlement		$ 0
Previously Reported | Pension Plan [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			749
Previously Reported | Pension Plan [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			6
Previously Reported | Pension Plan [Member] | Alternative Investments [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			724
Previously Reported | Pension Plan [Member] | Other Plan Assets [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			19
Restatement Adjustment [Member] | Pension Plan [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			(732)
Restatement Adjustment [Member] | Pension Plan [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
Restatement Adjustment [Member] | Pension Plan [Member] | Alternative Investments [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			(713)
Restatement Adjustment [Member] | Pension Plan [Member] | Other Plan Assets [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			$ (19)

PENSION PLANS AND OTHER POST_11

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Defined Contribution Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost	$ 15	$ 21	$ 17

RELATED PARTY TRANSACTIONS (Det

RELATED PARTY TRANSACTIONS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Dividends declared			$ (500)
The Dow Chemical Company [Member]
Related Party Transaction [Line Items]
Service Fee with Parent	10.00%
Notes Receivable, Related Parties	$ 1,300	$ 1,200
Line of Credit Facility, Maximum Borrowing Capacity	1,000
Notes Receivable, Related Parties, Noncurrent	949	949
Dividends declared	(553)	(603)
General and Administrative Expense [Member] | The Dow Chemical Company [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	30	33	27
Estimated Federal Tax Liability, Related Party [Member] | The Dow Chemical Company [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Tax Payment	220	294	415
Purchases from Dow [Member] | Cost of Sales [Member] | The Dow Chemical Company [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	1,600	1,700	1,400
Activity Based Costs [Member] | Cost of Sales [Member] | The Dow Chemical Company [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 85	$ 78	$ 58

FAIR VALUE MEASUREMENTS (Basis

FAIR VALUE MEASUREMENTS (Basis of Fair Value Measurements on a Recurring Basis) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Proceeds from sale of debt securities, available-for-sale	$ 0	$ 2	$ 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt	(474)	(475)
Cash and Cash Equivalents, Fair Value Disclosure	10	9
Long-term Debt, Fair Value	(541)	(604)
Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	10	9
Financial Instruments Gross Unrealized Gains	0	0
Financial Instruments Gross Unrealized Loss	0	0
Long-term Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Instruments Gross Unrealized Gains	0	0
Financial Instruments Gross Unrealized Loss	$ (67)	$ (129)

BUSINESS AND GEOGRAPHIC AREAS_2

BUSINESS AND GEOGRAPHIC AREAS (Schedule of Revenue by Geographic Area and Other Details) (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]
Sales to external customers	$ 136	$ 143	$ 108
Long-lived assets	1,448	1,379	1,394
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales to external customers	124	110	95
Long-lived assets	1,413	1,341	1,353
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales to external customers	2	21	3
Long-lived assets	10	9	10
Rest of World
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales to external customers	10	12	10
Long-lived assets	$ 25	$ 29	$ 31
Malaysia
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of Total Sales Related to a Specific Country in a Geographic Region	1.00%	15.00%	3.00%