Document and Entity Information	6 Months Ended
Document and Entity Information	Jun. 30, 2017 shares
Document and Entity Information
Entity Registrant Name	UNION CARBIDE CORP /NEW/
Entity Central Index Key	0000100790
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding	935.51

Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Consolidated Statements of Income - USD ($) $ in Millions	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net trade sales	$ 25	$ 24	$ 82	$ 50
Net sales to related companies	1,272	1,237	2,538	2,423
Total Net Sales	1,297	1,261	2,620	2,473
Cost of sales	1,024	936	2,065	1,769
Research and development expenses	8	5	10	9
Selling, general and administrative expenses	1	2	3	4
Restructuring Charges	2	2	2	2
Equity in earnings of nonconsolidated affiliate	0	1	0	3
Sundry income (expense) - net	17	37	5	24
Interest income	5	3	9	6
Interest expense and amortization of debt discount	7	5	14	11
Income Before Income Taxes	277	352	540	711
Provision for income taxes	95	179	185	298
Net Income Attributable to Union Carbide Corporation	182	173	355	413
Depreciation	42	41	87	81
Capital Expenditures	$ 48	$ 65	$ 98	$ 118

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net Income Attributable to Union Carbide Corporation	$ 182	$ 173	$ 355	$ 413
Other Comprehensive Income, Net of Tax
Cumulative translation adjustments	2	0	3	0
Pension and other postretirement benefit plans	12	10	24	21
Total other comprehensive income	14	10	27	21
Comprehensive Income Attributable to Union Carbide Corporation	$ 196	$ 183	$ 382	$ 434

Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Current Assets
Cash and cash equivalents	$ 13	$ 11
Accounts receivable:
Trade (net of allowance for doubtful receivables 2017: $-; 2016: $-)	21	15
Related companies	995	843
Other	47	36
Income taxes receivable	201	275
Notes receivable from related companies	1,171	1,411
Inventories	307	307
Other current assets	32	39
Total current assets	2,787	2,937
Investments
Investments in related companies	639	639
Investments in nonconsolidated affiliate	0	14
Other investments	25	30
Noncurrent receivables	53	52
Noncurrent receivables from related companies	55	57
Total investments	772	792
Property
Property	7,206	7,144
Less accumulated depreciation	5,802	5,750
Net property	1,404	1,394
Other Assets
Intangible assets (net of accumulated amortization 2017: $80; 2016: $78)	26	25
Deferred income tax assets - noncurrent	829	928
Deferred charges and other assets	41	70
Total other assets	896	1,023
Total Assets	5,859	6,146
Current Liabilities
Notes payable - related companies	27	25
Notes Payable to Bank	1	0
Long-term debt due within one year	1	1
Accounts payable:
Trade	245	249
Related companies	487	521
Other	20	7
Income taxes payable	20	23
Asbestos-related liabilities - current	121	126
Accrued and other current liabilities	167	181
Total current liabilities	1,089	1,133
Long-Term Debt	475	475
Other Noncurrent Liabilities
Pension and other postretirement benefits - noncurrent	977	1,170
Asbestos-related liabilities - noncurrent	1,301	1,364
Other noncurrent obligations	186	206
Total other noncurrent liabilities	2,464	2,740
Stockholder's 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	2,986	2,980
Accumulated other comprehensive loss	(1,293)	(1,320)
Union Carbide Corporation's stockholder's equity	1,831	1,798
Total Liabilities and Equity	$ 5,859	$ 6,146

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Allowance for doubtful accounts	$ 0	$ 0
Accumulated Amortization	$ 80	$ 78
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	1,000	1,000
Common stock, shares issued	935.51	935.51

Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Operating Activities
Net Income Attributable to Union Carbide Corporation	$ 355	$ 413
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	98	92
Provision (credit) for deferred income tax	85	(319)
Earnings of nonconsolidated affiliate in excess of dividends received	0	(1)
Net gain on sales of property and investments	(26)	(50)
Net gain on sale of ownership interest in nonconsolidated affiliate	(4)	0
Restructuring charges	2	2
Pension contributions	(161)	(51)
Other, net	0	(1)
Changes in assets and liabilities:
Accounts and notes receivable	7	2
Related company receivables	88	48
Inventories	0	(21)
Accounts payable	12	(8)
Related company payables	(32)	42
Asbestos-related payments	(68)	(31)
Other assets and liabilities	43	344
Cash provided by operating activities	399	461
Investing Activities
Capital expenditures	(98)	(118)
Change in noncurrent receivable from related company	2	(2)
Proceeds from sale of ownership interest in nonconsolidated affiliate	22	0
Proceeds from sales of property	18	57
Proceeds from sales of investments	8	3
Cash used in investing activities	(48)	(60)
Financing Activities
Dividends paid to stockholder	(350)	(400)
Changes in short-term notes payable	1	0
Payments on long-term debt	0	1
Cash used in financing activities	(349)	(401)
Summary
Increase in cash and cash equivalents	2	0
Cash and cash equivalents at beginning of year	11	23
Cash and cash equivalents at end of period	$ 13	$ 23

Consolidated Statements of Equity - USD ($) $ in Millions	Total	Union Carbide Corporation's Stockholder's Equity [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss), Net of Tax [Member]
Balance at beginning of year at Dec. 31, 2015			$ 0	$ 138	$ 3,391	$ (1,228)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Union Carbide Corporation	$ 413				413
Dividends declared					(400)
Other Comprehensive Income (Loss), Net of Tax	21					21
Balance at end of period at Jun. 30, 2016			0	138	3,405	(1,207)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' Equity, Other					1
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		$ 2,336
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	1,798
Balance at beginning of year at Dec. 31, 2016			0	138	2,980	(1,320)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Union Carbide Corporation	355				355
Dividends declared					(350)
Other Comprehensive Income (Loss), Net of Tax	27					27
Balance at end of period at Jun. 30, 2017			$ 0	$ 138	2,986	$ (1,293)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' Equity, Other					$ 1
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 1,831	$ 1,831

CONSOLIDATED FINANCIAL STATEMENTS	6 Months Ended
CONSOLIDATED FINANCIAL STATEMENTS	Jun. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
CONSOLIDATED FINANCIAL STATEMENTS	CONSOLIDATED FINANCIAL STATEMENTS The unaudited interim consolidated financial statements of Union Carbide Corporation and its subsidiaries (the "Corporation" or "UCC") were prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") and reflect all adjustments (including normal recurring accruals) which, in the opinion of management, are considered necessary for the fair presentation of the results for the periods presented. 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 global businesses. 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. Intercompany transactions and balances are eliminated in consolidation. Transactions with the Corporation’s parent company, Dow, and other Dow subsidiaries have been reflected as related company transactions in the consolidated financial statements. See Note 8 for further discussion. These statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2016. In the first quarter of 2017, the Corporation made a change to the consolidated statements of cash flows to include a new line under "Operating Activities" entitled "Asbestos-related payments." The new line captures cash payments made for asbestos-related claim and resolution activity as well as asbestos-related defense and processing costs (effective as of the fourth quarter of 2016 as a result of an accounting policy change). Prior periods have been updated to conform with the current year presentation.

RECENT ACCOUNTING GUIDANCE	6 Months Ended
RECENT ACCOUNTING GUIDANCE	Jun. 30, 2017
Recent Accounting Guidance [Abstract]
RECENT ACCOUNTING GUIDANCE	RECENT ACCOUNTING GUIDANCE Accounting Guidance Issued But Not Yet Adopted as of June 30, 2017 In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") 2014-09, "Revenue from Contracts with Customers (Topic 606)," which is the new comprehensive revenue recognition standard that will supersede all existing revenue recognition guidance under U.S. GAAP. 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. ASU 2015-14, "Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date," which was issued in August 2015, revised the effective date for this ASU to annual and interim periods beginning on or after December 15, 2017, with early adoption permitted, but not earlier than the original effective date of annual and interim periods beginning on or after December 15, 2016, for public entities. Entities will have the option of using either a full retrospective approach or a modified approach to adopt the guidance in ASU 2014-09. In May 2014, the FASB and International Accounting Standards Board formed The Joint Transition Resource Group for Revenue Recognition ("TRG"), consisting of financial statement preparers, auditors and users, to seek feedback on potential issues related to the implementation of the new revenue standard. As a result of feedback from the TRG, the FASB has issued additional guidance to provide clarification, implementation guidance and practical expedients to address some of the challenges of implementation. In March 2016, the FASB issued ASU 2016-08, "Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net)," which is an amendment on assessing whether an entity is a principal or an agent in a revenue transaction. This amendment addresses issues to clarify the principal versus agent assessment and lead to more consistent application. In April 2016, the FASB issued ASU 2016-10, "Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing," which contains amendments to the new revenue recognition standard on identifying performance obligations and accounting for licenses of intellectual property. The amendments related to identifying performance obligations clarify when a promised good or service is separately identifiable and allows entities to disregard items that are immaterial in the context of a contract. The licensing implementation amendments clarify how an entity should evaluate the nature of its promise in granting a license of intellectual property, which will determine whether revenue is recognized over time or at a point in time. In May 2016, the FASB issued ASU 2016-12, "Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients," which provides clarity and implementation guidance on assessing collectibility, presentation of sales taxes, noncash consideration, and completed contracts and contract modifications at transition. The new standards have the same effective date and transition requirements as ASU 2014-09. The Corporation has a team in place to analyze ASU 2014-09 and the related ASU's across all revenue streams to evaluate the impact of the new standard on revenue contracts. This includes reviewing current accounting policies and practices to identify potential differences that would result from applying the requirements under the new standard. The Corporation is completing contract evaluations and validating the results of applying the new revenue guidance. The Corporation has also started drafting its accounting policies and performed an assessment of the new disclosure requirements and expects to complete its evaluation of the impact of the accounting and disclosure requirements on its business processes, controls and systems by the end of the third quarter of 2017. Full implementation will be completed by the end of 2017. Based on analysis completed to date, the Corporation expects the potential impact on the recognition of revenue from product sales and licensing arrangements to remain substantially unchanged. The Corporation expects to adopt the new standard using the modified retrospective approach, under which the cumulative effect of initially applying the new guidance is recognized as an adjustment to the opening balance of retained earnings in the first quarter of 2018. In January 2016, the FASB issued ASU 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities," which amends the guidance in U.S. GAAP on the classification and measurement of financial instruments. Changes to the current guidance primarily affects the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. In addition, the ASU clarifies guidance related to the valuation allowance assessment when recognizing deferred tax assets resulting from unrealized losses on available-for-sale debt securities. The new standard is effective for fiscal years and interim periods beginning after December 15, 2017, and upon adoption, an entity should apply the amendments by means of a cumulative-effect adjustment to the balance sheet at the beginning of the first reporting period in which the guidance is effective. Early adoption is not permitted except for the provision to record fair value changes for financial liabilities under the fair value option resulting from instrument-specific credit risk in other comprehensive income. The Corporation is currently evaluating the impact of adopting this guidance. In February 2016, the FASB issued ASU 2016-02, "Leases (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 with lease terms of more than twelve months 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 (ASU 2014-09). The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, using a modified retrospective approach, and early adoption is permitted. The Corporation is currently evaluating the impact of adopting this guidance. In August 2016, the FASB issued ASU 2016-15, "Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments," which addresses diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows with respect to eight specific cash flow issues. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. The amendments should be applied using a retrospective transition method to each period presented, if practicable. Early adoption is permitted, including adoption in an interim period, and any adjustments should be reflected as of the beginning of the fiscal year that includes the interim period. All amendments must be adopted in the same period. The Corporation is currently evaluating the impact of adopting this guidance. In October 2016, the FASB issued 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 are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, and should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings at the beginning of the period of adoption. Early adoption is permitted in the first interim period of an annual reporting period for which financial statements have not been issued. The Corporation is currently evaluating the impact of adopting this guidance. In February 2017, the FASB issued ASU 2017-05, "Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets," which clarifies the scope of guidance on nonfinancial asset derecognition in Accounting Standards Codification 610-20 and the accounting for partial sales of nonfinancial assets. The new guidance also conforms the derecognition guidance for nonfinancial assets with the model in the new revenue standard (ASU 2014-09). The new standard is effective for annual reporting periods, and interim periods within those fiscal years, beginning after December 15, 2017, and an entity is required to apply the amendments at the same time that it applies the amendments in ASU 2014-09. The Corporation is currently evaluating the impact of adopting this guidance. In March 2017, the FASB issued 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 the 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 will be presented separately from the line item(s) that includes the service cost. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. Early adoption is permitted at the beginning of an annual period in which the financial statements have not been issued. Entities must use a retrospective transition method to adopt the requirement for separate presentation of the income statement 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. The Corporation is currently evaluating the impact of adopting this guidance.

INVENTORIES

6 Months Ended

Jun. 30, 2017

Inventory Disclosure [Abstract]

INVENTORIES

The following table provides a breakdown of inventories:



Inventories In millions	Jun 30, 2017			Dec 31, 2016
Finished goods	$	213		$	186
Work in process	36			38
Raw materials	46			50
Supplies	87			87
Total FIFO inventories	$	382		$	361
Adjustment of inventories to a LIFO basis	(75		)	(54		)
Total inventories	$	307		$	307

INTANGIBLE ASSETS

6 Months Ended

Jun. 30, 2017

Intangible Assets, Net (Excluding Goodwill) [Abstract]

INTANGIBLE ASSETS DISCLOSURE

INTANGIBLE ASSETS

The following table provides information regarding the Corporation’s intangible assets:



Intangible Assets	At June 30, 2017							At December 31, 2016
In millions	Gross Carrying Amount		Accumulated Amortization			Net		Gross Carrying Amount		Accumulated Amortization			Net
Intangible assets with finite lives:
Licenses and intellectual property	$	33	$	(33	)	$	—	$	33	$	(33	)	$	—
Software	73		(47		)	26		70		(45		)	25
Total intangible assets	$	106	$	(80	)	$	26	$	103	$	(78	)	$	25

Total estimated amortization expense for 2017 and the five succeeding fiscal years is as follows:



Estimated Amortization Expense In millions
2017	$	4
2018	$	6
2019	$	6
2020	$	6
2021	$	4
2022	$	2

FINANCIAL INSTRUMENTS

6 Months Ended

Jun. 30, 2017

Financial Instruments [Abstract]

Financial Instruments Disclosure [Text Block]

FINANCIAL INSTRUMENTS

Investments

The Corporation's investments in marketable securities are classified as available-for-sale. Proceeds from sales of available-for-sale securities were $2 million for the six-month period ended June 30, 2017 ($2 million in proceeds from the maturity of marketable securities for the six-month period ended June 30, 2016).

For securities 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.



Fair Value of Financial Instruments
	At June 30, 2017											At December 31, 2016
In millions	Cost			Gain		Loss			Fair Value			Cost			Gain		Loss			Fair Value
Cash equivalents	$	9		$	—	$	—		$	9		$	7		$	—	$	—		$	7
Debt securities (1)	$	—		$	—	$	—		$	—		$	2		$	—	$	—		$	2
Long-term debt including debt due within one year	$	(476	)	$	—	$	(125	)	$	(601	)	$	(476	)	$	—	$	(95	)	$	(571	)


(1)	Marketable securities are included in "Other investments" in the consolidated balance sheets.

For all other financial instruments, cost approximates fair value.

COMMITMENTS AND CONTINGENT LIABILITIES

6 Months Ended

Jun. 30, 2017

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES DISCLOSURE

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 June 30, 2017, the Corporation had accrued obligations of $135 million for probable environmental remediation and restoration costs, including $20 million for the remediation of Superfund sites. These obligations are 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 two 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, 2016, the Corporation had accrued obligations of $145 million for probable environmental remediation and restoration costs, including $20 million for the remediation of Superfund sites.

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

A description of asbestos-related matters can be found in Note 13 to the Consolidated Financial Statements included in the Corporation's Annual Report on Form 10-K for the year ended December 31, 2016.

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

Since 2003, the Corporation has engaged Ankura Consulting Group, LLC ("Ankura"), a third party actuarial specialist, to review the Corporation's historical asbestos-related claim and resolution activity in order to assist UCC management in estimating the Corporation's asbestos-related liability. Each year, Ankura has reviewed the claim and resolution activity to determine the appropriateness of updating the most recent Ankura study. Historically, every other year beginning in October, Ankura has completed a full review and formal update to the most recent Ankura study.

Based on the December 2016 Ankura study and the Corporation's own review of the data, and taking into account the change in accounting policy that occurred in the fourth quarter of 2016, the Corporation's total asbestos-related liability through the terminal year of 2049, including asbestos-related defense and processing costs, was $1,490 million at December 31, 2016, and was included in “Asbestos-related liabilities - current” and “Asbestos-related liabilities - noncurrent” in the consolidated balance sheets.

Each quarter, the Corporation reviews claims filed, settled and dismissed, as well as average settlement and resolution costs by disease category. The Corporation also considers additional quantitative and qualitative factors such as the nature of pending claims, trial experience of the Corporation and other asbestos defendants, current spending for defense and processing costs, significant appellate rulings and legislative developments, trends in the tort system, and their respective effects on expected future resolution costs. UCC management considers all these factors in conjunction with the most recent Ankura study and determines whether a change in the estimate is warranted. Based on the Corporation's review of 2017 activity, it was determined that no adjustment to the accrual was required at June 30, 2017.

The Corporation’s asbestos-related liability for pending and future claims and defense and processing costs was $1,422 million at June 30, 2017, and approximately 14 percent of the recorded liability related to pending claims and approximately 86 percent related to future claims.

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 over a significant period of time, 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

A summary of the Corporation's purchase commitments can be found in Note 13 to the Consolidated Financial Statements included in the Corporation's Annual Report on Form 10-K for the year ended December 31, 2016. There have been no material changes to purchase commitments since December 31, 2016.

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS

6 Months Ended

Jun. 30, 2017

Retirement Benefits [Abstract]

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS

PENSION AND OTHER POSTRETIREMENT BENEFITS



Net Periodic Benefit Cost for All Significant Plans	Three Months Ended						Six Months Ended
In millions	Jun 30, 2017			Jun 30, 2016			Jun 30, 2017			Jun 30, 2016
Defined Benefit Pension Plans:
Service cost	$	9		$	9		$	18		$	18
Interest cost	32			33			64			66
Expected return on plan assets	(55		)	(54		)	(110		)	(108		)
Amortization of net loss	21			19			42			38
Net periodic benefit cost	$	7		$	7		$	14		$	14

Other Postretirement Benefits:
Interest cost	$	2		$	2		$	4		$	4
Amortization of net gain	(1		)	(1		)	(2		)	(3		)
Net periodic benefit cost	$	1		$	1		$	2		$	1

RELATED PARTY TRANSACTIONS	6 Months Ended
RELATED PARTY TRANSACTIONS	Jun. 30, 2017
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS DISCLOSURE	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 is included in "Sundry income (expense) - net" in the consolidated statements of income. Purchases from that Dow subsidiary were $406 million in the second quarter of 2017 ($347 million in the second quarter of 2016) and $836 million during the first six months of 2017 ($632 million during the first six months of 2016). The increase in purchase costs in the first half of 2017 when compared with the same period last year is due to higher feedstock and energy costs. 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 $8 million in the second quarter of 2017 ($7 million in the second quarter of 2016) and $16 million for the first six months of 2017 ($14 million for the first six months of 2016) for general administrative and overhead type services and the 10 percent service fee, included in "Sundry income (expense) - net" in the consolidated statements of income. The remaining activity-based costs were $23 million in the second quarter of 2017 ($18 million in the second quarter of 2016) and $40 million in the first six months of 2017 ($34 million in the first six months of 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 June 30, 2017, the Corporation had a note receivable of $1.2 billion ($1.4 billion at December 31, 2016) 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 December 30, 2017. 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, with cash collateral. At June 30, 2017, $948 million ($947 million at December 31, 2016) was available under the revolving credit agreement. The cash collateral is 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 the second quarter of 2017, the Corporation declared and paid a cash dividend of $181 million to Dow; dividends to Dow totaled $350 million in the first six months of 2017. In the second quarter of 2016, the Corporation declared and paid a cash dividend of $200 million to Dow; dividends to Dow totaled $400 million for the first six months of 2016.

INCOME TAXES	6 Months Ended
INCOME TAXES	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	INCOME TAXES In the second quarter of 2016, an adjustment was made to a reserve for a tax matter regarding a historical change in the legal ownership structure of a former nonconsolidated affiliate. The adjustment arose due to legal proceedings and the Corporation’s ongoing assessment of the unrecognized tax benefits, which resulted in an unfavorable impact of $57 million to “Provision for income taxes” in the consolidated statements of income in the second quarter of 2016. Interest and penalties associated with uncertain tax positions are recognized as components of "Provision for income taxes" in the consolidated statements of income and totaled a benefit of $1 million for the three months ended June 30, 2017 (a charge of $90 million for the three months ended June 30, 2016). During the six months ended June 30, 2017, the Corporation recognized a benefit of $1 million for interest and penalties (a charge of $82 million for the six months ended June 30, 2016).

ACCUMULATED OTHER COMPREHENSIVE LOSS

6 Months Ended

Jun. 30, 2017

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

ACCUMULATED OTHER COMPREHENSIVE LOSS

The following table provides an analysis of the changes in accumulated other comprehensive loss for the six-month periods ended June 30, 2017 and 2016:



Accumulated Other Comprehensive Loss	Six Months Ended
In millions	Jun 30, 2017			Jun 30, 2016
Cumulative Translation Adjustments at beginning of year	$	(62	)	$	(61	)
Reclassification to earnings - Sundry income (expense) - net (1)	3			—
Balance at end of period	$	(59	)	$	(61	)
Pension and Other Postretirement Benefit Plans at beginning of year	$	(1,258	)	$	(1,167	)
Adjustments to pension and other postretirement benefit plans (net of tax of $16, $14) (2) (3)	24			21
Balance at end of period	$	(1,234	)	$	(1,146	)
Total Accumulated Other Comprehensive Loss	$	(1,293	)	$	(1,207	)


(1)	In 2017, reclassification resulted from the divestiture of a nonconsolidated affiliate.


(2)	Included in "Net periodic benefit cost." See Note 7 for additional information.


(3)	Tax amounts are included in "Provision for income taxes" in the consolidated statements of income.

Planned Merger with DuPont (Notes)	6 Months Ended
Planned Merger with DuPont (Notes)	Jun. 30, 2017
PLANNED MERGER WITH DUPONT [Abstract]
Proposed Merger with DuPont [Text Block]	PLANNED MERGER WITH DUPONT On December 11, 2015, Dow and E. I. du Pont de Nemours and Company ("DuPont") entered into an Agreement and Plan of Merger, as amended on March 31, 2017 (the "Merger Agreement"), to effect an all-stock, merger of equals strategic combination resulting in a newly formed corporation named DowDuPont Inc. ("DowDuPont"). Pursuant to the terms of the Merger Agreement, Dow and DuPont will each merge with wholly owned subsidiaries of DowDuPont (the "Mergers") and, as a result of the Mergers, will become subsidiaries of DowDuPont (collectively, the "Merger Transaction"). Following the consummation of the Mergers, Dow and DuPont intend to pursue, subject to the receipt of any required regulatory approvals and approval by the board of directors of DowDuPont, the separation of the combined company’s agricultural business, specialty products business and materials science business through one or more tax-efficient transactions. On March 27, 2017, Dow and DuPont announced that the European Commission ("EC") granted conditional approval in Europe of the companies' proposed merger of equals. The EC's approval was conditioned on DuPont and Dow fulfilling certain divestiture commitments given to the EC in connection with the clearance. Specifically, DuPont will divest its Cereal Broadleaf Herbicides and Chewing Insecticides portfolios as well as its Crop Protection research and development ("R&D") pipeline and organization (excluding seed treatment, nematicides, late-stage R&D programs and certain personnel needed to support marketed products and R&D programs that will remain with DuPont) (collectively, the "DuPont Divested Assets"). Dow will divest its global Ethylene Acrylic Acid ("EAA") copolymers and ionomers business to SK Global Chemical Co., Ltd., as announced on February 2, 2017. Dow's divestiture of the EAA business is conditioned on Dow and DuPont closing the Merger Transaction, in addition to other customary closing conditions, including the receipt of certain required regulatory approvals, local employment law and governance obligations. On March 31, 2017, in connection with the commitments given to the EC with respect to its conditional approval of the Merger Transaction, DuPont entered into an agreement with FMC Corporation ("FMC") whereby FMC will acquire the DuPont Divested Assets and DuPont will acquire FMC's Health and Nutrition business segment, excluding its Omega-3 products (the "H&N Business"). DuPont's transaction with FMC is expected to close in the fourth quarter of 2017, subject to the closing of the Merger Transaction, in addition to the waiver or satisfaction of other customary closing conditions, including approval by the EC of FMC as the buyer of the DuPont Divested Assets and the receipt of other required regulatory approvals. In connection with DuPont's proposed transaction with FMC, on March 31, 2017, Dow and DuPont amended the Merger Agreement to, among other things, extend the outside date from June 15, 2017 to August 31, 2017, and to provide that DuPont cannot take certain specified actions to obtain regulatory approvals with respect to its acquisition of the H&N Business if those actions would reasonably be likely to result in the one-year loss of revenues to Dow, DuPont, DowDuPont, their subsidiaries or the H&N Business in excess of $350 million in the aggregate (based on fiscal year 2016 annual revenues). In addition, the amendment of the Merger Agreement also amended the form of bylaws for DowDuPont to reflect that Dow and DuPont currently intend that the first step in the intended separation process will be the spin-off of the post-merger materials science business (assuming that such sequencing would allow for the completion of all of the intended spin-offs within 18 months following closing of the Merger Transaction and would not adversely impact the value of the intended spin-off transaction to DowDuPont's shareholders). On May 2, 2017, Dow and DuPont announced that China's Ministry of Commerce ("MOFCOM") granted conditional regulatory approval for the companies' proposed merger of equals which includes commitments already made to the EC including DuPont's divestiture of the DuPont Divested Assets and Dow's divestiture of the EAA copolymers and ionomers business. In addition, Dow and DuPont have made commitments related to the supply and distribution in China of certain herbicide and insecticide ingredients and formulations for rice crops for five years after the closing of the Merger Transaction. On May 17, 2017, Dow and DuPont announced that Brazil's Administrative Council for Economic Defense ("CADE") granted conditional regulatory approval of the companies' proposed merger of equals. CADE's approval is subject to Dow's divestment of a select portion of Dow AgroSciences' corn seed business in Brazil, including some seed processing plants and seed research centers, a copy of Dow AgroSciences' Brazilian corn germplasm bank, the MORGAN™ brand and a license for the use of the DOW SEMENTES™ brand for a certain period of time (collectively, the "Dow Divested Assets"), and is incremental to commitments already made to the EC, China and regulatory agencies in other jurisdictions. On July 11, 2017, Dow announced it had entered into a definitive agreement to sell the Dow Divested Assets to CITIC Agri Fund, which is conditioned on Dow and DuPont closing the Merger Transaction and approval by CADE. On June 15, 2017, Dow and DuPont announced that a proposed agreement has been reached with the Antitrust Division of the United States Department of Justice that will permit the companies to proceed with the proposed merger of equals transaction. The proposed agreement is consistent with commitments already made to the EC. On June 28, 2017, the Board of Directors ("Boards") of Dow and DuPont reiterated their support of the proposed merger of equals transaction. In addition, the Boards announced their support of a comprehensive portfolio review for DowDuPont, which is intended to assess current business facts and leverage the knowledge gained over the past year and a half to capture any material value-enhancing opportunities in preparation for the intended creation of three industry-leading companies. Dow and DuPont remain focused on closing the Merger Transaction. Closing is expected to occur in August 2017.

INVENTORIES (Tables)

6 Months Ended

Jun. 30, 2017

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

The following table provides a breakdown of inventories:



Inventories In millions	Jun 30, 2017			Dec 31, 2016
Finished goods	$	213		$	186
Work in process	36			38
Raw materials	46			50
Supplies	87			87
Total FIFO inventories	$	382		$	361
Adjustment of inventories to a LIFO basis	(75		)	(54		)
Total inventories	$	307		$	307

INTANGIBLE ASSETS (Tables)

6 Months Ended

Jun. 30, 2017

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Intangible Assets

The following table provides information regarding the Corporation’s intangible assets:



Intangible Assets	At June 30, 2017							At December 31, 2016
In millions	Gross Carrying Amount		Accumulated Amortization			Net		Gross Carrying Amount		Accumulated Amortization			Net
Intangible assets with finite lives:
Licenses and intellectual property	$	33	$	(33	)	$	—	$	33	$	(33	)	$	—
Software	73		(47		)	26		70		(45		)	25
Total intangible assets	$	106	$	(80	)	$	26	$	103	$	(78	)	$	25

Schedule of Expected Amortization Expense [Table Text Block]

Total estimated amortization expense for 2017 and the five succeeding fiscal years is as follows:



Estimated Amortization Expense In millions
2017	$	4
2018	$	6
2019	$	6
2020	$	6
2021	$	4
2022	$	2

FINANCIAL INSTRUMENTS FINANCIAL INSTRUMENTS (Tables)

6 Months Ended

Jun. 30, 2017

Financial Instruments [Abstract]

Fair Value, by Balance Sheet Grouping [Table Text Block]



Fair Value of Financial Instruments
	At June 30, 2017											At December 31, 2016
In millions	Cost			Gain		Loss			Fair Value			Cost			Gain		Loss			Fair Value
Cash equivalents	$	9		$	—	$	—		$	9		$	7		$	—	$	—		$	7
Debt securities (1)	$	—		$	—	$	—		$	—		$	2		$	—	$	—		$	2
Long-term debt including debt due within one year	$	(476	)	$	—	$	(125	)	$	(601	)	$	(476	)	$	—	$	(95	)	$	(571	)


(1)	Marketable securities are included in "Other investments" in the consolidated balance sheets.

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Tables)

6 Months Ended

Jun. 30, 2017

Retirement Benefits [Abstract]

Net Periodic Benefit Cost for All Significant Plans



Net Periodic Benefit Cost for All Significant Plans	Three Months Ended						Six Months Ended
In millions	Jun 30, 2017			Jun 30, 2016			Jun 30, 2017			Jun 30, 2016
Defined Benefit Pension Plans:
Service cost	$	9		$	9		$	18		$	18
Interest cost	32			33			64			66
Expected return on plan assets	(55		)	(54		)	(110		)	(108		)
Amortization of net loss	21			19			42			38
Net periodic benefit cost	$	7		$	7		$	14		$	14

Other Postretirement Benefits:
Interest cost	$	2		$	2		$	4		$	4
Amortization of net gain	(1		)	(1		)	(2		)	(3		)
Net periodic benefit cost	$	1		$	1		$	2		$	1

ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)

6 Months Ended

Jun. 30, 2017

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Accumulated Other Comprehensive Loss



Accumulated Other Comprehensive Loss	Six Months Ended
In millions	Jun 30, 2017			Jun 30, 2016
Cumulative Translation Adjustments at beginning of year	$	(62	)	$	(61	)
Reclassification to earnings - Sundry income (expense) - net (1)	3			—
Balance at end of period	$	(59	)	$	(61	)
Pension and Other Postretirement Benefit Plans at beginning of year	$	(1,258	)	$	(1,167	)
Adjustments to pension and other postretirement benefit plans (net of tax of $16, $14) (2) (3)	24			21
Balance at end of period	$	(1,234	)	$	(1,146	)
Total Accumulated Other Comprehensive Loss	$	(1,293	)	$	(1,207	)


(1)	In 2017, reclassification resulted from the divestiture of a nonconsolidated affiliate.


(2)	Included in "Net periodic benefit cost." See Note 7 for additional information.


(3)	Tax amounts are included in "Provision for income taxes" in the consolidated statements of income.

INVENTORIES (Schedule of Inventories) (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Finished goods	$ 213	$ 186
Work in process	36	38
Raw materials	46	50
Supplies	87	87
Total FIFO inventories	382	361
Adjustment of inventories to a LIFO basis	(75)	(54)
Total inventories	$ 307	$ 307

INTANGIBLE ASSETS (Schedule of Amortization Expense of Intangible Assets) (Table and Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 106	$ 103
Finite-Lived Intangible Assets, Accumulated Amortization	(80)	(78)
Finite-Lived Intangible Assets, Net	26	25
Licenses and intellectual property [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	73	70
Finite-Lived Intangible Assets, Accumulated Amortization	(47)	(45)
Finite-Lived Intangible Assets, Net	$ 26	$ 25

INTANGIBLE ASSETS (Schedule of Future Amortization Expense of Intangible Assets) (Details) $ in Millions	Jun. 30, 2017 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Estimated Amortization Expense, 2017	$ 4
Estimated Amortization Expense, 2018	6
Estimated Amortization Expense, 2019	6
Estimated Amortization Expense, 2020	6
Estimated Amortization Expense, 2021	4
Estimated Amortization Expense, 2022	$ 2

FINANCIAL INSTRUMENTS (Investments) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Financial Instruments [Abstract]
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds	$ 2	$ 2

FINANCIAL INSTRUMENTS FINANCIAL INSTRUMENTS (Fair Value of Financial Instruments) (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Long-term Debt, Fair Value	$ 601	$ 571
Long-term Debt	476	476
Long-term Debt [Member]
Schedule of Available-for-sale Securities [Line Items]
Financial Instruments Gross Unrealized Gains	0	0
Financial Instruments Gross Unrealized Loss	125	95
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	0	2
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	0	0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	0	0
Available-for-sale Securities	0	2
Money Market Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Cash Equivalents, at Carrying Value	9	7
Financial Instruments Gross Unrealized Gains	0	0
Financial Instruments Gross Unrealized Loss	$ 0	$ 0

COMMITMENTS AND CONTINGENT LIABILITIES (Environmental Matters) (Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	$ 135	$ 145
Accrual For Environmental Loss Contingencies Superfund Sites [Member]
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	$ 20	$ 20

COMMITMENTS AND CONTINGENT LIABILITIES (Asbestos-Related Matters of Union Carbide Corporation) (Table and Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Loss Contingencies [Line Items]
Liability for Asbestos Claims and Defense Costs Gross	$ 1,422	$ 1,490
Percentage of recorded asbestos liability related to pending claims	14.00%
Percentage of recorded asbestos liability related to future claims	86.00%

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Defined Benefit Pension Plans [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 9	$ 9	$ 18	$ 18
Interest cost	32	33	64	66
Expected return on plan assets	(55)	(54)	(110)	(108)
Amortization of net (gain) loss	21	19	42	38
Net periodic benefit cost	7	7	14	14
Other Postretirement Benefits [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Interest cost	2	2	4	4
Amortization of net (gain) loss	(1)	(1)	(2)	(3)
Net periodic benefit cost	$ 1	$ 1	$ 2	$ 1

RELATED PARTY TRANSACTIONS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Related Party Transaction [Line Items]
Payments of Dividends			$ 350	$ 400
The Dow Chemical Company [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 406	$ 347	$ 836	632
Service Fee with Parent			10.00%
Notes Receivable, Related Parties	1,200		$ 1,200		$ 1,400
Line of Credit Facility, Maximum Borrowing Capacity	1,000		1,000
Line of Credit Facility, Remaining Borrowing Capacity	948		948		$ 947
Payments of Dividends	181	200	350	400
Sundry income (expense) [Member] \| The Dow Chemical Company [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	8	7	16	14
Cost of Sales [Member] \| The Dow Chemical Company [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 23	$ 18	$ 40	$ 34

INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
INCOME TAXES (Details) - USD ($) $ in Millions	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	$ (1)	$ 90	$ (1)	$ 82
Provision (Credit) for income taxes [Member]
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense		$ 57

ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($)
$ in Millions

3 Months Ended

6 Months Ended

Jun. 30, 2017

Jun. 30, 2016

Jun. 30, 2017

Jun. 30, 2016

Adjustments to pension and other postretirement benefit plans (net of tax of $16, $14) (2) (3)

$ (12)

$ (10)

$ (24)

$ (21)

Accumulated Other Comprehensive Income (Loss) [Member]

Balance at beginning of year

(1,320)

(1,228)

Balance at end of period

(1,293)

(1,207)

(1,293)

(1,207)

Accumulated Translation Adjustment [Member]

Balance at beginning of year

(62)

(61)

Balance at end of period

(59)

(61)

(59)

(61)

Accumulated Defined Benefit Plans and Other Post Retirement Adjustment [Member]

Balance at beginning of year

(1,258)

(1,167)

Adjustments to pension and other postretirement benefit plans (net of tax of $16, $14) (2) (3)

^[1],[2]

Adjustments to pension and other postretirement benefit plans, tax

^[2]

Balance at end of period

$ (1,234)

$ (1,146)

(1,234)

(1,146)

Sundry Income [Member]

Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax

$ 3

^[3]

$ 0

[1]	Included in "Net periodic benefit cost." See Note 7 for additional information.
[2]	Tax amounts are included in "Provision for income taxes" in the consolidated statements of income.
[3]	In 2017, reclassification resulted from the divestiture of a nonconsolidated affiliate.

PLANNED MERGER WITH DUPONT PLANNED MERGER WITH DUPONT (Details) $ in Millions	3 Months Ended
	Jun. 30, 2017 USD ($) months
Business Acquisition [Line Items]
Planned Merger with DuPont, Maximum one-year loss of revenues to Dow for DuPont's proposed transaction with FMC \| $	$ 350
Planned Merger with DuPont, expected number of months for completion of intended spins \| months	18