Hexion (HXOH) 10-Q 7 Aug 18 2018 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - shares	6 Months Ended
	Jun. 30, 2018	Aug. 01, 2018
Document Information [Line Items]
Entity Registrant Name	Hexion Inc.
Entity Central Index Key	13,239
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		82,556,847

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents (including restricted cash of $16 and $18, respectively)	$ 130	$ 115
Accounts receivable (net of allowance for doubtful accounts of $18 and 19, respectively)	473	462
Inventories:
Finished and in-process goods	245	221
Raw materials and supplies	103	92
Current assets held for sale	0	6
Other current assets	62	44
Total current assets	1,013	940
Investment in unconsolidated entities	22	20
Deferred income taxes	9	8
Long-term assets held for sale	0	2
Other assets, net	42	49
Property and equipment
Land	87	84
Buildings	282	291
Machinery and equipment	2,299	2,327
Property, plant and equipment, gross	2,668	2,702
Less accumulated depreciation	(1,810)	(1,778)
Property, plant and equipment, net	858	924
Goodwill	110	112
Other intangible assets, net	32	42
Total assets	2,086	2,097
Current liabilities
Accounts payable	397	402
Debt payable within one year	82	125
Interest payable	82	82
Income taxes payable	10	12
Accrued payroll and incentive compensation	60	47
Current liabilities associated with assets held for sale	0	2
Other current liabilities	119	135
Total current liabilities	750	805
Long-term liabilities
Long-term debt	3,678	3,584
Long-term pension and post employment benefit obligations	246	262
Deferred income taxes	11	11
Other long-term liabilities	178	177
Total liabilities	4,863	4,839
Commitments and contingencies (see Note 7)
Deficit
Common stock—$0.01 par value; 300,000,000 shares authorized, 170,605,906 issued and 82,556,847 outstanding at June 30, 2018 and December 31, 2017	1	1
Paid-in capital	526	526
Treasury stock, at cost—88,049,059 shares	(296)	(296)
Accumulated other comprehensive loss	(10)	(8)
Accumulated deficit	(2,998)	(2,964)
Total Hexion Inc. shareholder’s deficit	(2,777)	(2,741)
Noncontrolling interest	0	(1)
Total deficit	(2,777)	(2,742)
Total liabilities and deficit	$ 2,086	$ 2,097

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Cash and Cash Equivalents
Restricted Cash and Cash Equivalents, Current	$ 16	$ 18
Accounts Receivable
net allowance for doubtful accounts	$ 18	$ 19
Common Stock
par value	$ 0.01	$ 0.01
shares authorized	300,000,000	300,000,000
shares issued	170,605,906	170,605,906
shares outstanding	82,556,847	82,556,847
Treasury stock, shares	88,049,059	88,049,059

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net sales	$ 995	$ 912	$ 1,941	$ 1,782
Cost of sales	829	778	1,618	1,515
Gross profit	166	134	323	267
Selling, general and administrative expense	77	77	159	156
Gain on disposition	0	0	(44)	0
Asset impairments	0	0	25	0
Business realignment costs	5	10	14	17
Other operating expense, net	11	9	20	3
Operating income	73	38	149	91
Interest expense, net	84	82	167	165
Loss on extinguishment of debt	0	0	0	3
Other non-operating expense (income), net	8	(7)	7	(5)
Loss before income tax and earnings from unconsolidated entities	(19)	(37)	(25)	(72)
Income tax expense (benefit)	3	(1)	11	7
Loss before earnings from unconsolidated entities	(22)	(36)	(36)	(79)
Earnings from unconsolidated entities, net of taxes	1	2	2	3
Net loss	(21)	(34)	(34)	(76)
Net income attributable to noncontrolling interest	(1)	0	(1)	0
Net (loss) income attributable to Hexion Inc.	$ (22)	$ (34)	$ (35)	$ (76)

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net loss	$ (21)	$ (34)	$ (34)	$ (76)
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(16)	9	(2)	15
Other comprehensive (loss) income	(16)	9	(2)	15
Comprehensive loss	(37)	(25)	(36)	(61)
Comprehensive income attributable to noncontrolling interest	1	0	1	0
Comprehensive loss attributable to Hexion Inc.	$ (38)	$ (25)	$ (37)	$ (61)

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows provided by (used in) operating activities
Net loss	$ (34)	$ (76)
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	58	56
Non-cash asset impairments	25	0
Deferred tax benefit	0	(2)
Loss (gain) on sale of assets	2	(2)
Gain on disposition	44	0
Amortization of deferred financing fees	8	8
Loss on extinguishment of debt	0	3
Unrealized foreign currency losses	12	4
Other non-cash adjustments	(2)	(2)
Net change in assets and liabilities:
Accounts receivable	(27)	(96)
Inventories	(40)	(50)
Accounts payable	12	13
Income taxes payable	1	1
Other assets, current and non-current	(18)	2
Other liabilities, current and long-term	5	(54)
Net cash used in operating activities	(42)	(195)
Cash flows provided by (used in) investing activities
Capital expenditures	(43)	(57)
Proceeds from disposition, net	49	0
Proceeds from sale of assets, net	1	4
Net cash (used in) provided by investing activities	7	(53)
Cash flows provided by financing activities
Net short-term debt borrowings	3	8
Borrowings of long-term debt	294	1,119
Repayments of long-term debt	(243)	(928)
Long-term debt and credit facility financing fees	(1)	(24)
Net cash provided by financing activities	53	175
Effect of exchange rates on cash and cash equivalents	(3)	5
Change in cash and cash equivalents	15	(68)
Cash and cash equivalents at beginning of period	115	196
Cash and cash equivalents at end of period	130	128
Supplemental disclosures of cash flow information
Interest, net	159	147
Income taxes, net of cash refunds	$ 10	$ 9

Condensed Consolidated Stateme7

Condensed Consolidated Statement of Equity (Deficit) - 6 months ended Jun. 30, 2018 - USD ($) $ in Millions	Total	Common Stock [Member]	Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Deficit [Member]	Parent [Member]	Noncontrolling Interest [Member]
Balance at Dec. 31, 2017	$ (2,742)	$ 1	$ 526	$ (296)	$ (8)	$ (2,964)	$ (2,741)	$ (1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(34)	0	0	0	0	(35)	(35)	1
Other comprehensive income	(2)	0	0	0	(2)	0	(2)	0
Impact of change in accounting policy	1	0	0	0	0	1	1	0
Balance at Jun. 30, 2018	$ (2,777)	$ 1	$ 526	$ (296)	$ (10)	$ (2,998)	$ (2,777)	$ 0

Background and Basis of Present

Background and Basis of Presentation	6 Months Ended
	Jun. 30, 2018
Background and Basis of Presentation [Abstract]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	Background and Basis of Presentation Based in Columbus, Ohio, Hexion Inc. (“Hexion” or the “Company”) serves global industrial markets through a broad range of thermoset technologies, specialty products and technical support for customers in a diverse range of applications and industries. The Company’s business is organized based on the products offered and the markets served. At June 30, 2018 , the Company had three reportable segments: Epoxy, Phenolic and Coating Resins; Forest Products Resins; and Corporate and Other. The Company’s direct parent is Hexion LLC, a holding company and wholly owned subsidiary of Hexion Holdings LLC (“Hexion Holdings”), the ultimate parent entity of Hexion. Hexion Holdings is controlled by investment funds managed by affiliates of Apollo Management Holdings, L.P. (together with Apollo Global Management, LLC and its subsidiaries, “Apollo”). The unaudited Condensed Consolidated Financial Statements include the accounts of the Company and its majority-owned subsidiaries in which minority shareholders hold no substantive participating rights. Intercompany accounts and transactions are eliminated in consolidation. In the opinion of management, all adjustments consisting of normal, recurring adjustments considered necessary for a fair statement have been included. Results for the interim periods are not necessarily indicative of results for the entire year. Year-end condensed consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America (“U.S. GAAP”). Pursuant to the rules and regulations of the Securities and Exchange Commission, certain information and disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted. These unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and the accompanying notes included in the Company’s most recent Annual Report on Form 10-K.

Significant Accounting Policies

Significant Accounting Policies	6 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	Summary of Significant Accounting Policies Revenue Recognition —The Company follows the principles-based five step model to recognize revenue upon the transfer of promised goods or services to customers and in an amount that reflects the consideration for which the entity expects to be entitled in exchange for those goods or services. Revenue, net of estimated allowances and returns, is recognized when the Company has completed its performance obligations under a contract and control of the product is transferred to the customer. Substantially all revenue is recognized at the time shipment is made or upon delivery as risk and title to the product transfer to the customer. Sales, value add, and other taxes that are collected concurrently with revenue-producing activities are excluded from revenue. Contract terms for certain transactions, including sales made on a consignment basis, result in the transfer of control of the finished product to the customer prior to the point at which the Company has the right to invoice for the product. In these cases, timing of revenue recognition will differ from the timing of invoicing to customers and will result in the Company recording a contract asset. At June 30, 2018 , a contract asset balance of $12 is recorded within “Other current assets” with a corresponding decrease of $9 recorded within “Finished and in-process goods” in the unaudited Condensed Consolidated Balance Sheet. Refer to Note 10 for additional discussion of the Company’s net sales by reportable segment disaggregated by geographic region. Shipping and Handling —Freight costs that are billed to customers are included in “Net sales” in the unaudited Condensed Consolidated Statements of Operations. Shipping costs are incurred to move the Company’s products from production and storage facilities to the customer. Handling costs are incurred from the point the product is removed from inventory until it is provided to the shipper and generally include costs to store, move and prepare the products for shipment. Revenue from shipping and handling services is recognized when control of the product is transferred to the customer. Shipping and handling costs are recorded in “Cost of sales” in the unaudited Condensed Consolidated Statements of Operations. Use of Estimates —The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and also requires the disclosure of contingent assets and liabilities at the date of the financial statements. In addition, it requires management to make estimates and assumptions that affect the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates. Subsequent Events —The Company has evaluated events and transactions subsequent to June 30, 2018 through the date of issuance of its unaudited Condensed Consolidated Financial Statements. Cash and Cash Equivalents — The Company considers all highly liquid investments that are purchased with an original maturity of three months or less to be cash equivalents. The Company’s restricted cash balances of $16 and $18 as of June 30, 2018 and December 31, 2017 , respectively, represent deposits to secure certain bank guarantees issued to third parties to guarantee potential obligations of the Company primarily related to the completion of tax audits and environmental liabilities. These balances will remain restricted as long as the underlying exposures exist and are included in the Consolidated Balance Sheets as a component of “Cash and cash equivalents.” Following the adoption of ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash, the Company includes restricted cash in the cash and cash equivalents balance of the Condensed Consolidated Statements of Cash Flows. The following table includes the restricted cash changes as a result of the adoption of ASU 2016-18 in the unaudited Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2017: Unaudited Condensed Consolidated Statements of Cash Flows For the six months ended June 30, 2017 Previous Accounting Method Effect of Accounting Change As Reported Cash flows used in investing activities Change in restricted cash $ 1 $ (1 ) $ — Net cash used in investing activities (52 ) (1 ) (53 ) Effect of exchange rates on cash and cash equivalents 3 2 5 Change in cash and cash equivalents (69 ) 1 (68 ) Cash and cash equivalents at beginning of period 179 17 196 Cash and cash equivalents at end of period $ 110 $ 18 $ 128 Recently Issued Accounting Standards Newly Adopted Accounting Standards In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Board Update No. 2014-09: Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”). ASU 2014-09 supersedes the existing revenue recognition guidance and most industry-specific guidance applicable to revenue recognition. According to the new guidance, an entity will apply a principles-based five step model to recognize revenue upon the transfer of promised goods or services to customers and in an amount that reflects the consideration for which the entity expects to be entitled in exchange for those goods or services. The effective date for ASU 2014-09 was for annual and interim periods beginning on or after December 15, 2017. The Company adopted ASU 2014-09 as of January 1, 2018 utilizing a modified retrospective approach, which resulted in a cumulative adjustment to “Accumulated deficit” of $1 on the date of adoption. ASU 2014-09 was applied to all open contracts as of the date of adoption and resulted only in timing differences for recognition of certain revenue items. The cumulative effects of the changes made to the Company’s unaudited Condensed Consolidated Balance Sheet on January 1, 2018 for the adoption of ASU 2014-09 were as follows: Balance at December 31, 2017 Adjustments due to ASU 2014-09 Balance at January 1, 2018 Assets Inventory $ 221 $ (11 ) $ 210 Other current assets 44 12 56 Deficit Accumulated deficit (2,964 ) 1 (2,963 ) In accordance with the new revenue standard requirements, the impact of adoption on the Company’s unaudited Condensed Consolidated Statements of Operations and unaudited Condensed Consolidated Balance Sheets were as follows: Income Statement For the three months ended June 30, 2018 For the six months ended June 30, 2018 As reported Balances without Adoption of ASC 606 Effect of change higher/(lower) As reported Balances without Adoption of ASC 606 Effect of change higher/(lower) Net sales $ 995 $ 995 $ — $ 1,941 $ 1,940 $ 1 Cost of sales 829 830 (1 ) 1,618 1,619 (1 ) Gross profit 166 165 1 323 321 2 Balance Sheet Balance at June 30, 2018 Assets As reported Balances without Adoption of ASC 606 Effect of change higher/(lower) Inventory $ 245 $ 254 $ (9 ) Other current assets 62 50 12 Deficit Accumulated deficit (2,998 ) (3,001 ) 3 In August 2016, the FASB issued Accounting Standards Board Update No. 2016-15: Statement of Cash Flows (Topic 230) (“ASU 2016-15”) as part of the FASB simplification initiative. ASU 2016-15 provides guidance on treatment in the statement of cash flows for eight specific cash flow topics, with the objective of reducing existing diversity in practice. Of the eight cash flow topics addressed in the new guidance, the topics expected to have an impact on the Company include debt prepayment or debt extinguishment costs, accounts receivable factoring, proceeds from the settlement of insurance claims and distributions received from equity method investees. The guidance was effective for annual periods beginning after December 15, 2017, including interim periods within that reporting period. The Company adopted ASU 2016-15 as of January 1, 2018 and adoption of this standard had an immaterial impact on the Company’s financial statements. In November 2016, the FASB issued Accounting Standards Board Update No. 2016-18: Statement of Cash Flows (Topic 230) Restricted Cash (“ASU 2016-18”) as part of the FASB simplification initiative. ASU 2016-18 requires that amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of period total amounts shown on the statement of cash flows. ASU 2016-18 also requires supplemental disclosure regarding the nature of restrictions on a company’s cash and cash equivalents, such as the purpose and terms of the restriction, expected duration of the restriction and the amount of cash subject to restriction. The guidance was effective for annual periods beginning after December 15, 2017, including interim periods within that reporting period. The Company adopted ASU 2016-18 as of January 1, 2018. As a result of adopting ASU 2016-18, the beginning and ending cash balances within the unaudited Condensed Consolidated Statements of Cash Flows now include restricted cash as of June 30, 2018 and 2017 . The impact of the adoption of this standard on the Company’s unaudited Condensed Consolidated Statements of Cash Flows is disclosed above in the cash and cash equivalents section of this footnote. In January 2017, the FASB issued Accounting Standards Board Update No. 2017-01: Clarifying the Definition of a Business (Topic 805) (“ASU 2017-01”). ASU 2017-01 clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The definition of a business affects many areas of accounting including acquisitions, disposals, goodwill, and consolidation. The guidance was effective for annual periods beginning after December 15, 2017, including interim periods within that reporting period. The Company adopted ASU 2017-01 as of January 1, 2018 and the adoption of this standard had no impact on the Company’s financial statements. In March 2017, the FASB issued Accounting Standards Board Update No. 2017-07: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (“ASU 2017-07”). ASU 2017-07 requires that an employer report the service cost component of its net periodic pension and postretirement benefit costs (“net benefit cost”) in the same line item or items as other compensation costs arising from services rendered by employees during the period. Additionally, ASU 2017-07 only allows the service cost component of net benefit cost to be eligible for capitalization into inventory. All other components of net benefit cost, which primarily include interest cost, expected return on assets and the annual mark-to-market liability remeasurement, are required to be presented in the income statement separately from the service cost component and outside of income from operations. The guidance was effective for annual periods beginning after December 15, 2017, including interim periods within that reporting period. The Company adopted ASU 2017-07 as of January 1, 2018. The components of the net (benefit) cost are shown in Note 8. The impact of these pension and OPEB accounting policy changes were applied through retrospective adoption of the new ASU 2017-07 to all periods presented. Accordingly, all relevant information for the three and six months ended June 30, 2018 and all prior periods has been adjusted to reflect the application of the changes. The effects of the changes to the unaudited Condensed Consolidated Statements of Operations are as follows: Unaudited Condensed Consolidated Statements of Operations for the three months ended June 30, 2017: Previous Accounting Method Effect of Accounting Change As Reported Selling, general and administrative expense $ 75 $ 2 $ 77 Operating income 40 (2 ) 38 Other non-operating expense (income), net (5 ) (2 ) (7 ) Unaudited Condensed Consolidated Statements of Operations for the six months ended June 30, 2017: Previous Accounting Method Effect of Accounting Change As Reported Selling, general and administrative expense $ 152 $ 4 $ 156 Operating income 95 (4 ) 91 Other non-operating expense (income), net (1 ) (4 ) (5 ) Newly Issued Accounting Standards In February 2016, the FASB issued Accounting Standards Board Update No. 2016-02: Leases (Topic 842) (“ASU 2016-02”). ASU 2016-02 supersedes the existing lease guidance in Topic 840. According to the new guidance, all leases, with limited scope exceptions, will be recorded on the balance sheet in the form of a liability to make lease payments (lease liability) and a right-of-use asset representing the right to use the underlying asset for the lease term. The guidance is effective for annual and interim periods beginning on or after December 15, 2018. The Company plans to adopt ASU 2016-02 on a prospective basis. The Company is currently assessing the potential impact of this standard on its financial statements through a formalized implementation project and is in process of implementing a software solution to facilitate the development of reporting and disclosure processes and controls around leases to meet the new accounting and disclosure requirements upon adoption in January 2019. In February 2018, the FASB issued Accounting Standards Board Update No. 2018-02: Income Statement-Reporting Comprehensive Income (Topic 220) (“ASU 2018-02”). ASU 2018-02 was issued in response to the United States tax reform legislation, the Tax Cuts and Jobs Act (“Tax Reform”), enacted in December 2017. The amendments in ASU 2018-02 allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the new tax legislation. The guidance is effective for annual and interim periods beginning on or after December 15, 2018, and early adoption is permitted. The Company is currently assessing the potential impact of ASU 2018-02 on its financial statements.

Restructuring (Notes)

Restructuring (Notes)	6 Months Ended
	Jun. 30, 2018
Restructuring and Related Activities [Abstract]
Restructuring & Business Realignment	Business Realignment Restructuring Activities In November 2017, the Company initiated new restructuring actions with the intent to optimize its cost structure. The total one-time cash costs expected to be incurred for these restructuring activities are estimated at $27 , consisting primarily of workforce reduction costs. The following table summarizes restructuring information by reporting segment: Epoxy, Phenolic and Coating Resins Forest Products Resins Corporate and Other Total Total restructuring costs expected to be incurred $ 14 $ 9 $ 4 $ 27 Total restructuring costs incurred through June 30, 2018 $ 12 $ 8 $ 4 $ 24 Accrued liability at December 31, 2017 $ 11 $ 3 $ 3 $ 17 Restructuring charges and adjustments — 3 1 4 Payments (7 ) (3 ) (1 ) (11 ) Accrued liability at June 30, 2018 $ 4 $ 3 $ 3 $ 10 Oilfield During the first quarter of 2018, the Company indefinitely idled an oilfield manufacturing facility within its Epoxy, Phenolic and Coating Resins segment, and production was shifted to another facility within the oilfield manufacturing group. This represented a triggering event resulting in an impairment evaluation of the fixed and intangible assets within the U.S. oilfield asset group. As a result, an asset impairment of $20 was recorded in the first quarter of 2018 related to the fixed assets at the idled manufacturing facility. In addition, the remaining U.S. oilfield asset group was evaluated for impairment utilizing a discounted cash flow approach, resulting in an additional impairment of $5 that was recorded during the first quarter of 2018 related to an existing customer relationship intangible asset. Overall, the Company incurred $25 of total impairment related to these assets, which is included in “Asset impairments” in the unaudited Condensed Consolidated Statements of Operations for the six months ended June 30, 2018 .

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2018
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Administrative Service, Management and Consulting Arrangement The Company is subject to a Management Consulting Agreement with Apollo (the “Management Consulting Agreement”) that renews on an annual basis, unless notice to the contrary is given by either party. Under the Management Consulting Agreement, the Company receives certain structuring and advisory services from Apollo and its affiliates. The Management Consulting Agreement provides indemnification to Apollo, its affiliates and their directors, officers and representatives for potential losses arising from these services. Apollo is entitled to an annual fee equal to the greater of $3 or 2% of the Company’s Adjusted EBITDA. Apollo elected to waive charges of any portion of the annual management fee due in excess of $3 for the calendar year 2018 and 2017 . During the three and six months ended June 30, 2018 and 2017 , the Company recognized expense under the Management Consulting Agreement of $1 and $2 , respectively. This amount is included in Other operating expense, net in the unaudited Condensed Consolidated Statements of Operations. Transactions with MPM Shared Services Agreement On October 1, 2010, the Company entered into a shared services agreement with Momentive Performance Materials Inc. (“MPM”) (which, from October 1, 2010 through October 24, 2014, was a subsidiary of Hexion Holdings), as amended in October 2014 (the “Shared Services Agreement”). Under this agreement, the Company provides to MPM, and MPM provides to the Company, certain services, including, but not limited to, executive and senior management, administrative support, human resources, information technology support, accounting, finance, legal and procurement services. The Shared Services Agreement establishes certain criteria upon which the costs of such services are allocated between the Company and MPM. The Shared Services Agreement was renewed for one year starting October 2017 and is subject to termination by either the Company or MPM, without cause, on not less than 30 days’ written notice, and expires in October 2018 (subject to one-year renewals every year thereafter; absent contrary notice from either party). The Company periodically reviews the scope of services provided under this agreement. Pursuant to the Shared Services Agreement, the below table summarizes the transactions between the Company and MPM: Six Months Ended June 30, 2018 2017 Net costs incurred by Hexion $ 19 $ 31 Net costs incurred by MPM (1) 14 23 (1) Included in the net costs incurred during the six months ended June 30, 2018 and 2017 , were net billings from Hexion to MPM of $9 and $15 , respectively, to bring the percentage of total net incurred costs for shared services under the Shared Services Agreement to the applicable agreed upon allocation percentage. June 30, 2018 December 31, 2017 Accounts receivable from MPM $ 1 $ 3 Sales and Purchases of Products with MPM The Company also sells products to, and purchases products from, MPM. During the three months ended June 30, 2017, the Company sold less that $1 of products to MPM and there were no products sold during the three months ended June 30, 2018. During the six months ended June 30, 2018 and 2017, the Company sold less than $1 of products to MPM. During the three and six months ended June 30, 2018 and 2017, the company earned less that $1 from MPM as compensation for acting as distributor of products. Refer to the below table for the summary of the purchases of products with MPM: Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 Purchases from MPM $ 9 $ 7 $ 16 $ 12 June 30, 2018 December 31, 2017 Accounts payable to MPM $ 3 $ 2 Purchases and Sales of Products and Services with Apollo Affiliates Other than MPM The Company sells products to various Apollo affiliates other than MPM. These sales were $1 for the three months ended June 30, 2017 and $1 and $2 for the six months ended June 30, 2018 and 2017, respectively. There were no sales for the three months ended June 30, 2018. Accounts receivable from these affiliates were less that $1 at both June 30, 2018 and December 31, 2017. Other Transactions and Arrangements The Company sells products and provides services to, and purchases products from, its joint ventures which are recorded under the equity method of accounting. Refer to the below table for a summary of the sales and purchases with the Company and its joint ventures which are recorded under the equity method of accounting: Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 Sales to joint ventures $ 3 $ 4 $ 6 $ 8 Purchases from joint ventures 3 3 5 7 June 30, 2018 December 31, 2017 Accounts receivable from joint ventures $ 7 $ 6 Accounts payable to joint ventures < 1 1 In addition to the accounts receivable from joint ventures disclosed above, the Company had a loan receivable of $7 and $6 as of June 30, 2018 and December 31, 2017 , respectively, from its unconsolidated forest products joint venture in Russia.

Fair Value

Fair Value	6 Months Ended
	Jun. 30, 2018
Fair Value and Financial Instruments [Abstract]
Fair Value	Fair Value Fair value is the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Fair value measurement provisions establish a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. This guidance describes three levels of inputs that may be used to measure fair value: • Level 1: Inputs are quoted prices (unadjusted) for identical assets or liabilities in active markets. • Level 2: Pricing inputs are other than quoted prices in active markets included in Level 1, which are either directly or indirectly observable as of the reported date. • Level 3: Unobservable inputs that are supported by little or no market activity and are developed based on the best information available in the circumstances. For example, inputs derived through extrapolation or interpolation that cannot be corroborated by observable market data. Recurring Fair Value Measurements As of June 30, 2018 , the Company had derivative assets related to foreign exchange, electricity and natural gas contracts of $3, which were measured using level 2 inputs, and consisted of derivative instruments transacted primarily in over-the-counter markets. There were no transfers between Level 1, Level 2 or Level 3 measurements during the six months ended June 30, 2018 or 2017 . The Company calculates the fair value of its Level 2 derivative liabilities using standard pricing models with market-based inputs, adjusted for nonperformance risk. When its financial instruments are in a liability position, the Company evaluates its credit risk as a component of fair value. At both June 30, 2018 and December 31, 2017 , no adjustment was made by the Company to reduce its derivative position for nonperformance risk. When its financial instruments are in an asset position, the Company is exposed to credit loss in the event of nonperformance by other parties to these contracts and evaluates their credit risk as a component of fair value. Non-derivative Financial Instruments The following table summarizes the carrying amount and fair value of the Company’s non-derivative financial instruments: Carrying Amount (1) Fair Value Level 1 Level 2 Level 3 Total June 30, 2018 Debt $ 3,795 $ — $ 3,449 $ 65 $ 3,514 December 31, 2017 Debt $ 3,750 $ — $ 3,206 $ 49 $ 3,255 (1) Debt carrying amounts exclude unamortized deferred debt issuance costs of $35 and $41 at June 30, 2018 and December 31, 2017 , respectively. Fair values of debt classified as Level 2 are determined based on other similar financial instruments, or based upon interest rates that are currently available to the Company for the issuance of debt with similar terms and maturities. Level 3 amounts represent capital leases whose fair value is determined through the use of present value and specific contract terms. The carrying amount and fair value of the Company’s debt is exclusive of unamortized deferred financing fees. The carrying amounts of cash and cash equivalents, short term investments, accounts receivable, accounts payable and other accrued liabilities are considered reasonable estimates of their fair values due to the short-term maturity of these financial instruments.

Debt Obligations

Debt Obligations	6 Months Ended
	Jun. 30, 2018
Debt Disclosure [Abstract]
Debt Obligations	Debt Obligations Debt outstanding at June 30, 2018 and December 31, 2017 is as follows: June 30, 2018 December 31, 2017 Long-Term Due Within One Year Long-Term Due Within One Year ABL Facility $ 120 $ — $ 81 $ — Senior Secured Notes: 6.625% First-Priority Senior Secured Notes due 2020 (includes $2 of unamortized debt premium) 1,552 — 1,552 — 10.00% First-Priority Senior Secured Notes due 2020 315 — 315 — 10.375% First-Priority Senior Secured Notes due 2022 560 — 560 — 13.75% Senior Secured Notes due 2022 225 — 225 — 9.00% Second-Priority Senior Secured Notes due 2020 574 — 574 — Debentures: 9.2% debentures due 2021 74 — 74 — 7.875% debentures due 2023 189 — 189 — Other Borrowings: Australia Facility due 2021 (1) 33 4 — 50 Brazilian bank loans 10 37 9 34 Lease obligations 57 8 44 5 Other 4 33 2 36 Unamortized debt issuance costs (35 ) — (41 ) — Total $ 3,678 $ 82 $ 3,584 $ 125 (1) In February 2018, the Company extended its Australian Term Loan Facility through January 2021. The Company has $1.9 billion of First Priority Senior Secured Notes maturing in April 2020 and $0.6 billion of Second Priority Notes maturing in November 2020. Additionally, if 91 days prior to the scheduled maturity of these notes, more than $ 50 aggregate principal amount of the maturing notes is outstanding, the ABL Facility, which matures in December 2021, will accelerate and become immediately due and payable. The Company regularly reviews its portfolio and is currently exploring potential divestitures. While there is no guarantee of a transaction, it could include a specific business unit or combination of several businesses. The Company expects that the proceeds from a transaction or transactions upon completion would be used to help reduce the absolute amount of the Company’s debt. Further, depending upon market, pricing and other conditions, including the current state of the high yield bond market, as well as cash balances and available liquidity, the Company or its affiliates, may seek to acquire notes or other indebtedness of the Company through open market purchases, privately negotiated transactions, tender offers, redemption or otherwise, upon such terms and at such prices as the Company or its affiliates may determine (or as may be provided for in the indentures governing the notes), for cash or other consideration.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Environmental Matters The Company’s operations involve the use, handling, processing, storage, transportation and disposal of hazardous materials. The Company is subject to extensive environmental regulation at the federal, state and local levels as well as foreign laws and regulations, and is therefore exposed to the risk of claims for environmental remediation or restoration. In addition, violations of environmental laws or permits may result in restrictions being imposed on operating activities, substantial fines, penalties, damages or other costs, any of which could have a material adverse effect on the Company’s business, financial condition, results of operations or cash flows. The following table summarizes all probable environmental remediation, indemnification and restoration liabilities, including related legal expenses, at June 30, 2018 and December 31, 2017 : Liability Range of Reasonably Possible Costs at June 30, 2018 Site Description June 30, 2018 December 31, 2017 Low High Geismar, LA $ 13 $ 14 $ 9 $ 22 Superfund and offsite landfills – allocated share: Less than 1% 2 2 1 4 Equal to or greater than 1% 6 6 5 14 Currently-owned 4 4 3 9 Formerly-owned: Remediation 23 26 21 39 Monitoring only — — — 1 Total $ 48 $ 52 $ 39 $ 89 These amounts include estimates for unasserted claims that the Company believes are probable of loss and reasonably estimable. The estimate of the range of reasonably possible costs is less certain than the estimates upon which the liabilities are based. To establish the upper end of a range, assumptions less favorable to the Company among the range of reasonably possible outcomes were used. As with any estimate, if facts or circumstances change, the final outcome could differ materially from these estimates. At June 30, 2018 and December 31, 2017 , $8 and $11 , respectively, have been included in “Other current liabilities” in the unaudited Condensed Consolidated Balance Sheets, with the remaining amount included in “Other long-term liabilities.” Following is a discussion of the Company’s environmental liabilities and the related assumptions at June 30, 2018 : Geismar, LA Site —The Company formerly owned a basic chemicals and polyvinyl chloride business that was taken public as Borden Chemicals and Plastics Operating Limited Partnership (“BCPOLP”) in 1987. The Company retained a 1% interest, the general partner interest and the liability for certain environmental matters after BCPOLP’s formation. Under a Settlement Agreement approved by the United States Bankruptcy Court for the District of Delaware among the Company, BCPOLP, the United States Environmental Protection Agency and the Louisiana Department of Environmental Quality, the Company agreed to perform certain tasks related to BCPOLP’s obligations for soil and groundwater contamination at BCPOLP’s Geismar, Louisiana site. The Company bears the sole responsibility for these obligations because there are no other potentially responsible parties (“PRP”) or third parties from whom the Company could seek reimbursement. A groundwater pump and treat system to remove contaminants is operational, and natural attenuation studies are proceeding. If closure procedures and remediation systems prove to be inadequate, or if additional contamination is discovered, costs that would approach the higher end of the range of possible outcomes could result. Due to the long-term nature of the project, the reliability of timing and the ability to estimate remediation payments, a portion of this liability was recorded at its net present value, assuming a 3% discount rate and a time period of 21 years. The range of possible outcomes is discounted in a similar manner. The undiscounted liability, which is expected to be paid over the next 21 years , is approximately $18 . Over the next five years, the Company expects to make ratable payments totaling $5 . Superfund Sites and Offsite Landfills —The Company is currently involved in environmental remediation activities at a number of sites for which it has been notified that it is, or may be, a PRP under the United States Comprehensive Environmental Response, Compensation and Liability Act or similar state “superfund” laws. The Company anticipates approximately 50% of the estimated liability for these sites will be paid within the next five years, with the remainder over the next twenty-five years. The Company generally does not bear a significant level of responsibility for these sites, and as a result, has little control over the costs and timing of cash flows. The Company’s ultimate liability will depend on many factors including its share of waste volume, the financial viability of other PRPs, the remediation methods and technology used, the amount of time necessary to accomplish remediation and the availability of insurance coverage. The range of possible outcomes takes into account the maturity of each project, resulting in a more narrow range as the project progresses. To estimate both its current reserves for environmental remediation at these sites and the possible range of additional costs, the Company has not assumed that it will bear the entire cost of remediation of every site to the exclusion of other known PRPs who may be jointly and severally liable. The Company has limited information to assess the viability of other PRPs and their probable contribution on a per site basis. The Company’s insurance provides very limited, if any, coverage for these environmental matters. Sites Under Current Ownership —The Company is conducting environmental remediation at a number of locations that it currently owns, of which ten sites are no longer in operation. As the Company is performing a portion of the remediation on a voluntary basis, it has some control over the costs to be incurred and the timing of cash flows. The factors influencing the ultimate outcome include the methods of remediation elected, the conclusions and assessment of site studies remaining to be completed, and the time period required to complete the work. No other parties are responsible for remediation at these sites. Formerly-Owned Sites —The Company is conducting, or has been identified as a PRP in connection with, environmental remediation at a number of locations that it formerly owned and/or operated. Remediation costs at these former sites, such as those associated with our former phosphate mining and processing operations, could be material. The Company has accrued those costs for formerly-owned sites which are currently probable and reasonably estimable. One such site is the Coronet Industries, Inc. Superfund Alternative Site in Plant City, Florida. The current owner of the site alleged that it incurred environmental costs at the site for which it has a contribution claim against the Company, and that additional future costs are likely to be incurred. The Company signed a settlement agreement with the current owner and past owner of the site, which provides the Company will pay $10 over three annual installments in fulfillment of the contribution claim against the Company for past remediation costs. The Company timely paid all three annual installments. Additionally, the Company accepted a 40% allocable share of specified future remediation costs at this site. The Company estimates its allocable share of future remediation costs to be approximately $14 . The final costs to the Company will depend on the method of remediation chosen, the amount of time necessary to accomplish remediation and the ongoing financial viability of the other PRPs. Currently, the Company has insufficient information to estimate the range of reasonably possible costs related to this site. Monitoring Only Sites —The Company is responsible for a number of sites that require monitoring where no additional remediation is expected. The Company has established reserves for costs related to these sites. Payment of these liabilities is anticipated to occur over the next ten or more years. The ultimate cost to the Company will be influenced by fluctuations in projected monitoring periods or by findings that are different than anticipated. Indemnifications —In connection with the acquisition of certain of the Company’s operating businesses, the Company has been indemnified by the sellers against certain liabilities of the acquired businesses, including liabilities relating to both known and unknown environmental contamination arising prior to the date of the purchase. The indemnifications may be subject to certain exceptions and limitations, deductibles and indemnity caps. While it is reasonably possible that some costs could be incurred, except for those sites identified above, the Company has inadequate information to allow it to estimate a potential range of liability, if any. Non-Environmental Legal Matters The Company is involved in various legal proceedings in the ordinary course of business and had reserves of $2 and $3 at June 30, 2018 and December 31, 2017 , respectively, for all non-environmental legal defense costs incurred and settlement costs that it believes are probable and estimable. At June 30, 2018 and December 31, 2017 , $2 has been included in “Other current liabilities” in the unaudited Condensed Consolidated Balance Sheets, with less than $1 included in “Other long-term liabilities.” Other Legal Matters —The Company is also involved in various product liability, commercial and employment litigation, personal injury, property damage and other legal proceedings, including actions that allege harm caused by products the Company has allegedly made or used, containing silica, vinyl chloride monomer and asbestos. The Company believes it has adequate reserves and that it is not reasonably possible that a loss exceeding amounts already reserved would be material. Furthermore, the Company has insurance to cover claims of these types.

Pension and Postretirement Expe

Pension and Postretirement Expense	6 Months Ended
	Jun. 30, 2018
Defined Benefit Plan [Abstract]
Pension and Other Postretirement Benefit Plans	Pension and Postretirement Benefit Plans As a result of the adoption of ASU 2017-07, the Company’s service cost component of net benefit cost is included in “Operating income” and all other components of net benefit cost are included in “Other non-operating expense (income), net” within the Company’s unaudited Condensed Consolidated Statements of Operations. Following are the components of net benefit cost recognized by the Company for the three and six months ended June 30, 2018 and 2017 : Pension Benefits Non-Pension Postretirement Benefits Three Months Ended June 30, Three Months Ended June 30, 2018 2017 2018 2017 U.S. Non-U.S. U.S. Non-U.S. U.S. Plans Non-U.S. Plans U.S. Plans Non-U.S. Plans Service cost $ — $ 5 $ — $ 4 $ — $ — $ — $ — Interest cost on projected benefit obligation 2 2 2 2 — — — 1 Expected return on assets (3 ) (3 ) (3 ) (3 ) — — — — Net (benefit) expense $ (1 ) $ 4 $ (1 ) $ 3 $ — $ — $ — $ 1 Pension Benefits Non-Pension Postretirement Benefits Six Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 U.S. Plans Non-U.S. Plans U.S. Plans Non-U.S. Plans U.S. Plans Non-U.S. Plans U.S. Plans Non-U.S. Plans Service cost $ 1 $ 9 $ 1 $ 8 $ — $ — $ — $ — Interest cost on projected benefit obligation 4 5 4 4 — — — 1 Expected return on assets (7 ) (6 ) (7 ) (5 ) — — — — Net (benefit) expense $ (2 ) $ 8 $ (2 ) $ 7 $ — $ — $ — $ 1

Disposition (Notes)

Disposition (Notes)	6 Months Ended
	Jun. 30, 2018
Discontinued Operations and Disposal Groups [Abstract]
Disposition	9 . Dispositions ATG On January 8, 2018, the Company completed the sale of its Additives Technology Group business (“ATG”). ATG was previously included within the Company’s Forest Products Resins segment and includes manufacturing sites located in Somersby, Australia and Sungai Petani, Malaysia. The ATG business produces a range of specialty chemical materials for the engineered wood, paper impregnation and laminating industries, including catalysts, release agents and wetting agents. The Company received gross cash consideration for the ATG business in the amount of $49 , which was used for general corporate purposes. The Company recorded a gain on this disposition of $44 which is included in “Gain on disposition” in the unaudited Condensed Consolidated Statements of Operations.

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2018
Segment Reporting [Abstract]
Segment Information	Segment Information The Company’s business segments are based on the products that the Company offers and the markets that it serves. In the fourth quarter of 2017, the Company added Corporate and Other as a reportable segment. At June 30, 2018 , the Company had three reportable segments: Epoxy, Phenolic and Coating Resins; Forest Products Resins; and Corporate and Other. A summary of the major products of the Company’s reportable segments follows: • Epoxy, Phenolic and Coating Resins: epoxy specialty resins, phenolic encapsulated substrates, versatic acids and derivatives, basic epoxy resins and intermediates and phenolic specialty resins and molding compounds • Forest Products Resins: forest products resins and formaldehyde applications • Corporate and Other : primarily corporate general and administrative expenses that are not allocated to the other segments, such as shared service and administrative functions, foreign exchange gains and losses and legacy company costs. Reportable Segments Following are net sales and Segment EBITDA (earnings before interest, income taxes, depreciation and amortization) by reportable segment. Segment EBITDA is defined as EBITDA adjusted for certain non-cash items and other income and expenses. Segment EBITDA is the primary performance measure used by the Company’s senior management, the chief operating decision-maker and the board of directors to evaluate operating results and allocate capital resources among segments. Segment EBITDA is also the profitability measure used to set management and executive incentive compensation goals. Corporate and Other is primarily corporate general and administrative expenses that are not allocated to the other segments, such as shared service and administrative functions, foreign exchange gains and losses and legacy company costs not allocated to continuing segments. Net Sales (1) : Following is revenue by reportable segment. Product sales within each reportable segment share economically similar risks. These risks include general economic and industrial conditions, competitive pricing pressures and the Company’s ability to pass on fluctuations in raw material prices to its customers. A substantial number of the Company’s raw material inputs are petroleum-based and their prices fluctuate with the price of oil. Due to differing regional industrial and economic conditions, the geographic distribution of revenue may impact the amount, timing and uncertainty of revenue and cash flows from contracts with customers. Following is net sales by reportable segment disaggregated by geographic region: Three Months Ended June 30, 2018 Three Months Ended June 30, 2017 Epoxy, Phenolic and Coating Resins Forest Products Resins Total Epoxy, Phenolic and Coating Resins Forest Products Resins Total North America $ 237 $ 294 $ 531 $ 207 $ 268 $ 475 Europe 249 52 301 223 48 271 Asia Pacific 77 35 112 85 34 119 Latin America 1 50 51 2 45 47 Total $ 564 $ 431 $ 995 $ 517 $ 395 $ 912 Six Months Ended June 30, 2018 Six Months Ended June 30, 2017 Epoxy, Phenolic and Coating Resins Forest Products Resins Total Epoxy, Phenolic and Coating Resins Forest Products Resins Total North America $ 470 $ 562 $ 1,032 $ 408 $ 519 $ 927 Europe 494 106 600 445 96 541 Asia Pacific 138 66 204 152 65 217 Latin America 2 103 105 4 93 97 Total $ 1,104 $ 837 $ 1,941 $ 1,009 $ 773 $ 1,782 (1) Intersegment sales are not significant and, as such, are eliminated within the selling segment. Reconciliation of Net Loss to Segment EBITDA: Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 Reconciliation: Net loss attributable to Hexion Inc. $ (22 ) $ (34 ) $ (35 ) $ (76 ) Net income attributable to noncontrolling interest (1 ) — (1 ) — Net loss (21 ) (34 ) (34 ) (76 ) Income tax expense (benefit) 3 (1 ) 11 7 Interest expense, net 84 82 167 165 Depreciation and amortization 28 28 58 56 EBITDA $ 94 $ 75 $ 202 $ 152 Items not included in Segment EBITDA: Asset impairments $ — $ — $ 25 $ — Business realignment costs 5 10 14 17 Gain on disposition — — (44 ) — Realized and unrealized foreign currency losses (gains) 15 (1 ) 22 (2 ) Loss on extinguishment of debt — — — 3 Other 14 16 27 25 Total adjustments 34 25 44 43 Segment EBITDA $ 128 $ 100 $ 246 $ 195 Segment EBITDA: Epoxy, Phenolic and Coating Resins $ 72 $ 46 $ 142 $ 98 Forest Products Resins 76 68 143 129 Corporate and Other (20 ) (14 ) (39 ) (32 ) Total $ 128 $ 100 $ 246 $ 195 Items Not Included in Segment EBITDA Not included in Segment EBITDA are certain non-cash items and other income and expenses. For the three and six months ended June 30, 2018 and 2017, these items primarily include expenses from retention programs and certain professional fees related to strategic projects. Business realignment costs for the three and six months ended June 30, 2018 and 2017 primarily include costs related to certain in-process facility rationalizations and cost reduction programs.

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income (Notes)	6 Months Ended
	Jun. 30, 2018
Changes of Accumulated Other Comprehensive Income [Abstract]
Changes in Accumulated Other Comprehensive Loss	Changes in Accumulated Other Comprehensive Loss Following is a summary of changes in “Accumulated other comprehensive loss” for the three and six months ended June 30, 2018 and 2017 : Three Months Ended June 30, 2018 Three Months Ended June 30, 2017 Defined Benefit Pension and Postretirement Plans Foreign Currency Translation Adjustments Total Defined Benefit Pension and Postretirement Plans Foreign Currency Translation Adjustments Total Beginning balance $ 1 $ 5 $ 6 $ 3 $ (36 ) $ (33 ) Other comprehensive (loss) income before reclassifications, net of tax — (16 ) (16 ) — 9 9 Ending balance $ 1 $ (11 ) $ (10 ) $ 3 $ (27 ) $ (24 ) Six Months Ended June 30, 2018 Six Months Ended June 30, 2017 Defined Benefit Pension and Postretirement Plans Foreign Currency Translation Adjustments Total Defined Benefit Pension and Postretirement Plans Foreign Currency Translation Adjustments Total Beginning balance $ 1 $ (9 ) $ (8 ) $ 3 $ (42 ) $ (39 ) Other comprehensive (loss) income before reclassifications, net of tax — (2 ) (2 ) — 15 15 Ending balance $ 1 $ (11 ) $ (10 ) $ 3 $ (27 ) $ (24 )

Income Taxes (Notes)

Income Taxes (Notes)	6 Months Ended
	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	Income Taxes On December 22, 2017, the United States enacted tax reform legislation (“Tax Reform”) that included a broad range of business tax provisions, including but not limited to a reduction in the U.S. federal tax rate from 35% to 21% as well as provisions that limit or eliminate various deductions or credits. The legislation also causes U.S. expenses, such as interest and general administrative expenses, to be taxed and imposes a new tax on U.S. cross-border payments. The 2017 provision for income taxes included a provisional one-time charge of $65 for the transition tax on accumulated foreign earnings and profits, which resulted in an associated one-time reduction of an estimated $185 in the Company’s net operating loss carryforward. The 2017 provisional amounts for transition tax and related reduction to the Company’s net operating loss carryforward remain unchanged as of June 30, 2018 . In response to the enactment of U.S. tax reform, the SEC issued guidance (referred to as “SAB 118”) to address the complexity in accounting for this new legislation. When the initial accounting for items under the new legislation is incomplete, the guidance allows companies to recognize provisional amounts when reasonable estimates can be made or to continue to apply the prior tax law if a reasonable estimate of the impact cannot be made. The SEC has provided up to a one-year window for companies to finalize the accounting for the impacts of this new legislation and the Company anticipates finalizing its accounting during 2018. The Company's accounting for the above items is based upon reasonable estimates of the tax effects of Tax Reform; however, its estimates may change upon the finalization of its implementation and additional interpretive guidance from regulatory authorities. We continue the process of gathering and analyzing additional information with respect to our earnings and profits to more precisely compute the amount of the one-time transition tax. The Company will complete its accounting for the above tax effects of Tax Reform during 2018 as provided in SAB 118 and will reflect any adjustments to its provisional amounts as an adjustment to the provision for taxes in the reporting period in which the amounts are finally determined. Additionally, certain provisions of Tax Reform are not effective until 2018. The Company continues to evaluate the impact of these provisions and has recorded a net zero impact in the financial statements due to U.S.’ valuation allowance. The Company has not made any accounting policy elections with respect to these items. The effective tax rate was (16)% and 3% for the three months ended June 30, 2018 and 2017 , respectively. The effective tax rate was (44)% and (10)% for the six months ended June 30, 2018 and 2017 , respectively. The change in the effective tax rate was primarily attributable to the amount and distribution of income and losses among the various jurisdictions in which we operate. The effective tax rates were also impacted by operating gains and losses generated in jurisdictions where no tax expense or benefit was recognized due to the maintenance of a full valuation allowance. For the three and six months ended June 30, 2018 and 2017 , income tax expense relates primarily to income from certain foreign operations. In 2018 and 2017 , losses in the United States and certain foreign jurisdictions had no impact on income tax expense as no tax benefit was recognized due to the maintenance of a full valuation allowance.

Guarantor Non-Guarantor Subsidi

Guarantor Non-Guarantor Subsidiary Financial Information	6 Months Ended
	Jun. 30, 2018
Guarantor Non Guarantor Subsidary Financial Information [Abstract]
Guarantor/Non-Guarantor Subsidiary Financial Information	Guarantor/Non-Guarantor Subsidiary Financial Information The Company’s 6.625% First-Priority Senior Secured Notes due 2020, 10.00% First-Priority Senior Secured Notes due 2020, 10.375% First Priority Senior Secured Notes due 2022, 13.75% Senior Secured Notes due 2022 and 9.00% Second-Priority Senior Secured Notes due 2020 are guaranteed by certain of its U.S. subsidiaries. The following information contains the condensed consolidating financial information for Hexion Inc. (the parent), the combined subsidiary guarantors (Hexion Investments Inc.; Lawter International, Inc.; Hexion Deer Park LLC (became a subsidiary guarantor in June 2018); HSC Capital Corporation (dissolved in April 2017); Hexion International Inc.; Hexion CI Holding Company (China) LLC; NL COOP Holdings LLC and Oilfield Technology Group, Inc. (dissolved in September 2017)) and the combined non-guarantor subsidiaries, which includes all of the Company’s foreign subsidiaries. All of the subsidiary guarantors are 100% owned by Hexion Inc. All guarantees are full and unconditional, and are joint and several. There are no significant restrictions on the ability of the Company to obtain funds from its domestic subsidiaries by dividend or loan. While the Company’s Australian, New Zealand and Brazilian subsidiaries are restricted in the payment of dividends and intercompany loans due to the terms of their credit facilities, there are no material restrictions on the Company’s ability to obtain cash from the remaining non-guarantor subsidiaries. These financial statements are prepared on the same basis as the consolidated financial statements of the Company except that investments in subsidiaries are accounted for using the equity method for purposes of the consolidating presentation. The principal elimination entries relate to investments in subsidiaries and intercompany balances and transactions. This information includes allocations of corporate overhead to the combined non-guarantor subsidiaries based on net sales. Income tax expense has been provided on the combined non-guarantor subsidiaries based on actual effective tax rates. HEXION INC. JUNE 30, 2018 CONDENSED CONSOLIDATING BALANCE SHEET (Unaudited) Hexion Inc. Combined Subsidiary Guarantors Combined Non-Guarantor Subsidiaries Eliminations Consolidated Assets Current assets: Cash and cash equivalents (including restricted cash of $0 and $16, respectively) $ 42 $ — $ 88 $ — $ 130 Accounts receivable, net 116 1 356 — 473 Intercompany accounts receivable 58 — 56 (114 ) — Intercompany loans receivable - current portion 123 — — (123 ) — Inventories: Finished and in-process goods 97 — 148 — 245 Raw materials and supplies 39 — 64 — 103 Other current assets 23 — 39 — 62 Total current assets 498 1 751 (237 ) 1,013 Investment in unconsolidated entities 144 14 21 (157 ) 22 Deferred income taxes — — 9 — 9 Other assets, net 13 7 22 — 42 Intercompany loans receivable 1,098 — 135 (1,233 ) — Property and equipment, net 374 — 484 — 858 Goodwill 52 — 58 — 110 Other intangible assets, net 23 — 9 — 32 Total assets $ 2,202 $ 22 $ 1,489 $ (1,627 ) $ 2,086 Liabilities and Deficit Current liabilities: Accounts payable $ 130 $ — $ 267 $ — $ 397 Intercompany accounts payable 56 — 58 (114 ) — Debt payable within one year 8 — 74 — 82 Intercompany loans payable within one year — — 123 (123 ) — Interest payable 81 — 1 — 82 Income taxes payable 5 — 5 — 10 Accrued payroll and incentive compensation 31 — 29 — 60 Other current liabilities 69 — 50 — 119 Total current liabilities 380 — 607 (237 ) 750 Long-term liabilities: Long-term debt 3,520 — 158 — 3,678 Intercompany loans payable 135 — 1,098 (1,233 ) — Accumulated losses of unconsolidated subsidiaries in excess of investment 804 157 — (961 ) — Long-term pension and post employment benefit obligations 29 — 217 — 246 Deferred income taxes 1 — 10 — 11 Other long-term liabilities 110 — 68 — 178 Total liabilities 4,979 157 2,158 (2,431 ) 4,863 Total deficit (2,777 ) (135 ) (669 ) 804 (2,777 ) Total liabilities and deficit $ 2,202 $ 22 $ 1,489 $ (1,627 ) $ 2,086 HEXION INC. DECEMBER 31, 2017 CONDENSED CONSOLIDATING BALANCE SHEET Hexion Inc. Combined Subsidiary Guarantors Combined Non-Guarantor Subsidiaries Eliminations Consolidated Assets Current assets: Cash and cash equivalents (including restricted cash of $0 and $18, respectively) $ 13 $ — $ 102 $ — $ 115 Accounts receivable, net 126 1 335 — 462 Intercompany accounts receivable 121 — 80 (201 ) — Intercompany loans receivable - current portion 1 — 22 (23 ) — Inventories: Finished and in-process goods 85 — 136 — 221 Raw materials and supplies 36 — 56 — 92 Current assets held-for-sale 1 — 5 — 6 Other current assets 19 — 25 — 44 Total current assets 402 1 761 (224 ) 940 Investment in unconsolidated entities 158 13 20 (171 ) 20 Deferred income taxes — — 8 — 8 Long-term assets held for sale — — 2 — 2 Other long-term assets 17 8 24 — 49 Intercompany loans receivable 1,114 — 190 (1,304 ) — Property and equipment, net 410 — 514 — 924 Goodwill 52 — 60 — 112 Other intangible assets, net 32 — 10 — 42 Total assets $ 2,185 $ 22 $ 1,589 $ (1,699 ) $ 2,097 Liabilities and Deficit Current liabilities: Accounts payable $ 129 $ — $ 273 $ — $ 402 Intercompany accounts payable 80 — 121 (201 ) — Debt payable within one year 10 — 115 — 125 Intercompany loans payable within one year 22 — 1 (23 ) — Interest payable 80 — 2 — 82 Income taxes payable 6 — 6 — 12 Accrued payroll and incentive compensation 22 — 25 — 47 Current liabilities associated with assets held for sale — — 2 — 2 Other current liabilities 70 — 65 — 135 Total current liabilities 419 — 610 (224 ) 805 Long term liabilities: Long-term debt 3,507 — 77 — 3,584 Intercompany loans payable 190 — 1,114 (1,304 ) — Accumulated losses of unconsolidated subsidiaries in excess of investment 668 171 — (839 ) — Long-term pension and post employment benefit obligations 31 — 231 — 262 Deferred income taxes 2 — 9 — 11 Other long-term liabilities 109 — 68 — 177 Total liabilities 4,926 171 2,109 (2,367 ) 4,839 Total Hexion Inc. shareholder’s deficit (2,741 ) (149 ) (519 ) 668 (2,741 ) Noncontrolling interest — — (1 ) — (1 ) Total deficit (2,741 ) (149 ) (520 ) 668 (2,742 ) Total liabilities and deficit $ 2,185 $ 22 $ 1,589 $ (1,699 ) $ 2,097 HEXION INC. THREE MONTHS ENDED JUNE 30, 2018 CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS (Unaudited) Hexion Inc. Combined Subsidiary Guarantors Combined Non-Guarantor Subsidiaries Eliminations Consolidated Net sales $ 460 $ — $ 583 $ (48 ) $ 995 Cost of sales 370 — 507 (48 ) 829 Gross profit 90 — 76 — 166 Selling, general and administrative expense 44 — 33 — 77 Business realignment costs 3 — 2 — 5 Other operating expense, net 3 — 8 — 11 Operating income 40 — 33 — 73 Interest expense, net 80 — 4 — 84 Intercompany interest (income) expense, net (21 ) — 21 — — Other non-operating expense (income), net 36 — (28 ) — 8 (Loss) income before tax and earnings from unconsolidated entities (55 ) — 36 — (19 ) Income tax expense 1 — 2 — 3 (Loss) income before earnings from unconsolidated entities (56 ) — 34 — (22 ) Earnings from unconsolidated entities, net of taxes 34 17 1 (51 ) 1 Net (loss) income (22 ) 17 35 (51 ) (21 ) Net income attributable to noncontrolling interest — — (1 ) — (1 ) Net (loss) income attributable to Hexion Inc. $ (22 ) $ 17 $ 34 $ (51 ) $ (22 ) Comprehensive (loss) income attributable to Hexion Inc. $ (38 ) $ 16 $ 35 $ (51 ) $ (38 ) HEXION INC. THREE MONTHS ENDED JUNE 30, 2017 CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS (Unaudited) Hexion Inc. Combined Subsidiary Guarantors Combined Non-Guarantor Subsidiaries Eliminations Consolidated Net sales $ 417 $ — $ 550 $ (55 ) $ 912 Cost of sales 355 — 478 (55 ) 778 Gross profit 62 — 72 — 134 Selling, general and administrative expense 34 — 43 — 77 Business realignment costs 6 — 4 — 10 Other operating income, net 3 — 6 — 9 Operating income 19 — 19 — 38 Interest expense, net 78 — 4 — 82 Intercompany interest (income) expense, net (18 ) — 18 — — Other non-operating (income) expense, net (50 ) — 43 — (7 ) Income (loss) before income tax and (losses) earnings from unconsolidated entities 9 — (46 ) — (37 ) Income tax expense (benefit) 2 — (3 ) — (1 ) Income (loss) before (losses) earnings from unconsolidated entities 7 — (43 ) — (36 ) (Losses) earnings from unconsolidated entities, net of taxes (41 ) (32 ) 1 74 2 Net loss $ (34 ) $ (32 ) $ (42 ) $ 74 $ (34 ) Comprehensive loss $ (25 ) $ (31 ) $ (46 ) $ 77 $ (25 ) HEXION INC. SIX MONTHS ENDED JUNE 30, 2018 CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS (Unaudited) Hexion Combined Combined Eliminations Consolidated Net sales $ 891 $ — $ 1,153 $ (103 ) $ 1,941 Cost of sales 727 — 994 (103 ) 1,618 Gross profit 164 — 159 — 323 Selling, general and administrative expense 80 — 79 — 159 Gain on disposition (24 ) — (20 ) — (44 ) Asset impairments 25 — — — 25 Business realignment costs 9 — 5 — 14 Other operating expense, net 3 — 17 — 20 Operating income 71 — 78 — 149 Interest expense, net 159 — 8 — 167 Intercompany interest (income) expense, net (41 ) — 41 — — Other non-operating expense (income), net 17 — (10 ) — 7 (Loss) income before tax and earnings from unconsolidated entities (64 ) — 39 — (25 ) Income tax expense (6 ) — 17 — 11 (Loss) income before earnings earnings from unconsolidated entities (58 ) — 22 — (36 ) Earnings from unconsolidated entities, net of taxes 23 14 2 (37 ) 2 Net (loss) income (35 ) 14 24 (37 ) (34 ) Net income attributable to noncontrolling interest — — (1 ) — (1 ) Net (loss) income attributable to Hexion Inc. $ (35 ) $ 14 $ 23 $ (37 ) $ (35 ) Comprehensive (loss) income $ (37 ) $ 14 $ 37 $ (51 ) $ (37 ) HEXION INC. SIX MONTHS ENDED JUNE 30, 2017 CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS (Unaudited) Hexion Combined Combined Eliminations Consolidated Net sales $ 795 $ — $ 1,093 $ (106 ) $ 1,782 Cost of sales 677 — 944 (106 ) 1,515 Gross profit 118 — 149 — 267 Selling, general and administrative expense 67 — 89 — 156 Business realignment costs 10 — 7 — 17 Other operating (income) expense, net (3 ) — 6 — 3 Operating income 44 — 47 — 91 Interest expense, net 158 — 7 — 165 Intercompany interest (income) expense, net (35 ) — 35 — — Loss on extinguishment of debt 3 — — — 3 Other non-operating (income) expense, net (58 ) — 53 — (5 ) Loss before income tax and (losses) earnings from unconsolidated entities (24 ) — (48 ) — (72 ) Income tax (benefit) expense (4 ) — 11 — 7 Loss before (losses) earnings from unconsolidated entities (20 ) — (59 ) — (79 ) (Losses) earnings from unconsolidated entities, net of taxes (56 ) (34 ) 2 91 3 Net loss $ (76 ) $ (34 ) $ (57 ) $ 91 $ (76 ) Comprehensive loss $ (61 ) $ (34 ) $ (49 ) $ 83 $ (61 ) HEXION INC. SIX MONTHS ENDED JUNE 30, 2018 CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS (Unaudited) Hexion Inc. (b) Combined Subsidiary Guarantors Combined Non-Guarantor Subsidiaries (b) Eliminations Consolidated Cash flows (used in) provided by operating activities $ (185 ) $ — $ 143 $ — $ (42 ) Cash flows provided by (used in) investing activities Capital expenditures (13 ) — (30 ) — (43 ) Proceeds from disposition, net 24 — 25 — 49 Proceeds from sale of assets, net — — 1 — 1 Return of capital from subsidiary from sales of accounts receivable 172 (a) — — (172 ) — 183 — (4 ) (172 ) 7 Cash flows provided by (used in) financing activities Net short-term debt borrowings (5 ) — 8 — 3 Borrowings of long-term debt 150 — 144 — 294 Repayments of long-term debt (140 ) — (103 ) — (243 ) Net intercompany loan borrowings (repayments) 26 — (26 ) — — Long-term debt and credit facility financing fees paid — — (1 ) — (1 ) Return of capital to parent from sales of accounts receivable — — (172 ) (a) 172 — 31 — (150 ) 172 53 Effect of exchange rates on cash and cash equivalents — — (3 ) — (3 ) Change in cash and cash equivalents 29 — (14 ) — 15 Cash and cash equivalents at beginning of period 13 — 102 — 115 Cash and cash equivalents at end of period $ 42 $ — $ 88 $ — $ 130 (a) During the six months ended June 30, 2018 , Hexion Inc. contributed receivables of $172 to a non-guarantor subsidiary as capital contributions, resulting in a non-cash transaction. During the six months ended June 30, 2018 , the non-guarantor subsidiary sold the contributed receivables to certain banks under various supplier financing agreements. The cash proceeds were returned to Hexion Inc. by the non-guarantor subsidiary as a return of capital. The sale of receivables has been included within cash flows from operating activities on the Combined non-guarantor subsidiaries. The return of the cash proceeds from the sale of receivables has been included as a financing outflow and an investing inflow on the Combined Non-Guarantor Subsidiaries and Hexion Inc., respectively. (b) Reflected in the “Hexion Inc.” and the “Combined Non-Guarantor Subsidiaries” columns is a correction of an error presented in the three months ended March 31, 2018 Condensed Consolidating Statement of Cash Flows. The impact of this correction is a decrease of $42 to “Cash flows (used in) provided by operating activities” and “Net intercompany loan borrowings (repayments)” for the “Hexion Inc.” and “Combined Non-guarantor Subsidiaries” columns, respectively, and an increase of $42 to “Net intercompany loan borrowings (repayments)” and “Cash flows (used in) provided by operating activities” for the “Hexion Inc.” and “Combined Non-Guarantor Subsidiaries” columns, respectively. Management does not believe that this error correction is material to the unaudited Condensed Consolidated Financial Statements for the three months ended March 31, 2018 or the six months ended June 30, 2018. HEXION INC. SIX MONTHS ENDED JUNE 30, 2017 CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS (Unaudited) Hexion Inc. Combined Subsidiary Guarantors Combined Non-Guarantor Subsidiaries Eliminations Consolidated Cash flows used in operating activities $ (186 ) $ — $ (9 ) $ — $ (195 ) Cash flows provided by (used in) investing activities Capital expenditures (23 ) — (34 ) — (57 ) Proceeds from sale of assets, net 4 — — — 4 Return of capital from subsidiary from sales of accounts receivable 68 (a) — — (68 ) — 49 — (34 ) (68 ) (53 ) Cash flows provided by (used in) financing activities Net short-term debt (repayments) borrowings (5 ) — 13 — 8 Borrowings of long-term debt 915 — 204 — 1,119 Repayments of long-term debt (801 ) — (127 ) — (928 ) Net intercompany loan borrowings (repayments) 31 — (31 ) — — Long-term debt and credit facility financing fees (20 ) — (4 ) — (24 ) Return of capital to parent from sales of accounts receivable — — (68 ) (a) 68 — 120 — (13 ) 68 175 Effect of exchange rates on cash and cash equivalents — — 5 — 5 Change in cash and cash equivalents (17 ) — (51 ) — (68 ) Cash and cash equivalents at beginning of period 28 — 168 — 196 Cash and cash equivalents at end of period $ 11 $ — $ 117 $ — $ 128 (a) During the six months ended June 30, 2017 , Hexion Inc. contributed receivables of $68 to a non-guarantor subsidiary as capital contributions, resulting in a non-cash transaction. During the six months ended June 30, 2017 , the non-guarantor subsidiary sold the contributed receivables to certain banks under various supplier financing agreements. The cash proceeds were returned to Hexion Inc. by the non-guarantor subsidiary as a return of capital. The sale of receivables has been included within cash flows from operating activities on the Combined non-guarantor subsidiaries. The return of the cash proceeds from the sale of receivables has been included as a financing outflow and an investing inflow on the Combined Non-Guarantor Subsidiaries and Hexion Inc., respectively.

Significant Accounting Polici21

Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Revenue Recognition, Policy [Policy Text Block]	Revenue Recognition —The Company follows the principles-based five step model to recognize revenue upon the transfer of promised goods or services to customers and in an amount that reflects the consideration for which the entity expects to be entitled in exchange for those goods or services. Revenue, net of estimated allowances and returns, is recognized when the Company has completed its performance obligations under a contract and control of the product is transferred to the customer. Substantially all revenue is recognized at the time shipment is made or upon delivery as risk and title to the product transfer to the customer. Sales, value add, and other taxes that are collected concurrently with revenue-producing activities are excluded from revenue. Contract terms for certain transactions, including sales made on a consignment basis, result in the transfer of control of the finished product to the customer prior to the point at which the Company has the right to invoice for the product. In these cases, timing of revenue recognition will differ from the timing of invoicing to customers and will result in the Company recording a contract asset. At June 30, 2018 , a contract asset balance of $12 is recorded within “Other current assets” with a corresponding decrease of $9 recorded within “Finished and in-process goods” in the unaudited Condensed Consolidated Balance Sheet. Refer to Note 10 for additional discussion of the Company’s net sales by reportable segment disaggregated by geographic region.
Shipping and Handling Cost, Policy [Policy Text Block]	Shipping and Handling —Freight costs that are billed to customers are included in “Net sales” in the unaudited Condensed Consolidated Statements of Operations. Shipping costs are incurred to move the Company’s products from production and storage facilities to the customer. Handling costs are incurred from the point the product is removed from inventory until it is provided to the shipper and generally include costs to store, move and prepare the products for shipment. Revenue from shipping and handling services is recognized when control of the product is transferred to the customer. Shipping and handling costs are recorded in “Cost of sales” in the unaudited Condensed Consolidated Statements of Operations.
Use of Estimates, Policy [Policy Text Block]	Use of Estimates —The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and also requires the disclosure of contingent assets and liabilities at the date of the financial statements. In addition, it requires management to make estimates and assumptions that affect the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates.
Subsequent Events, Policy [Policy Text Block]	Subsequent Events —The Company has evaluated events and transactions subsequent to June 30, 2018 through the date of issuance of its unaudited Condensed Consolidated Financial Statements.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and Cash Equivalents — The Company considers all highly liquid investments that are purchased with an original maturity of three months or less to be cash equivalents. The Company’s restricted cash balances of $16 and $18 as of June 30, 2018 and December 31, 2017 , respectively, represent deposits to secure certain bank guarantees issued to third parties to guarantee potential obligations of the Company primarily related to the completion of tax audits and environmental liabilities. These balances will remain restricted as long as the underlying exposures exist and are included in the Consolidated Balance Sheets as a component of “Cash and cash equivalents.” Following the adoption of ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash, the Company includes restricted cash in the cash and cash equivalents balance of the Condensed Consolidated Statements of Cash Flows. The following table includes the restricted cash changes as a result of the adoption of ASU 2016-18 in the unaudited Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2017: Unaudited Condensed Consolidated Statements of Cash Flows For the six months ended June 30, 2017 Previous Accounting Method Effect of Accounting Change As Reported Cash flows used in investing activities Change in restricted cash $ 1 $ (1 ) $ — Net cash used in investing activities (52 ) (1 ) (53 ) Effect of exchange rates on cash and cash equivalents 3 2 5 Change in cash and cash equivalents (69 ) 1 (68 ) Cash and cash equivalents at beginning of period 179 17 196 Cash and cash equivalents at end of period $ 110 $ 18 $ 128
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]	Recently Issued Accounting Standards Newly Adopted Accounting Standards In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Board Update No. 2014-09: Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”). ASU 2014-09 supersedes the existing revenue recognition guidance and most industry-specific guidance applicable to revenue recognition. According to the new guidance, an entity will apply a principles-based five step model to recognize revenue upon the transfer of promised goods or services to customers and in an amount that reflects the consideration for which the entity expects to be entitled in exchange for those goods or services. The effective date for ASU 2014-09 was for annual and interim periods beginning on or after December 15, 2017. The Company adopted ASU 2014-09 as of January 1, 2018 utilizing a modified retrospective approach, which resulted in a cumulative adjustment to “Accumulated deficit” of $1 on the date of adoption. ASU 2014-09 was applied to all open contracts as of the date of adoption and resulted only in timing differences for recognition of certain revenue items. The cumulative effects of the changes made to the Company’s unaudited Condensed Consolidated Balance Sheet on January 1, 2018 for the adoption of ASU 2014-09 were as follows: Balance at December 31, 2017 Adjustments due to ASU 2014-09 Balance at January 1, 2018 Assets Inventory $ 221 $ (11 ) $ 210 Other current assets 44 12 56 Deficit Accumulated deficit (2,964 ) 1 (2,963 ) In accordance with the new revenue standard requirements, the impact of adoption on the Company’s unaudited Condensed Consolidated Statements of Operations and unaudited Condensed Consolidated Balance Sheets were as follows: Income Statement For the three months ended June 30, 2018 For the six months ended June 30, 2018 As reported Balances without Adoption of ASC 606 Effect of change higher/(lower) As reported Balances without Adoption of ASC 606 Effect of change higher/(lower) Net sales $ 995 $ 995 $ — $ 1,941 $ 1,940 $ 1 Cost of sales 829 830 (1 ) 1,618 1,619 (1 ) Gross profit 166 165 1 323 321 2 Balance Sheet Balance at June 30, 2018 Assets As reported Balances without Adoption of ASC 606 Effect of change higher/(lower) Inventory $ 245 $ 254 $ (9 ) Other current assets 62 50 12 Deficit Accumulated deficit (2,998 ) (3,001 ) 3 In August 2016, the FASB issued Accounting Standards Board Update No. 2016-15: Statement of Cash Flows (Topic 230) (“ASU 2016-15”) as part of the FASB simplification initiative. ASU 2016-15 provides guidance on treatment in the statement of cash flows for eight specific cash flow topics, with the objective of reducing existing diversity in practice. Of the eight cash flow topics addressed in the new guidance, the topics expected to have an impact on the Company include debt prepayment or debt extinguishment costs, accounts receivable factoring, proceeds from the settlement of insurance claims and distributions received from equity method investees. The guidance was effective for annual periods beginning after December 15, 2017, including interim periods within that reporting period. The Company adopted ASU 2016-15 as of January 1, 2018 and adoption of this standard had an immaterial impact on the Company’s financial statements. In November 2016, the FASB issued Accounting Standards Board Update No. 2016-18: Statement of Cash Flows (Topic 230) Restricted Cash (“ASU 2016-18”) as part of the FASB simplification initiative. ASU 2016-18 requires that amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of period total amounts shown on the statement of cash flows. ASU 2016-18 also requires supplemental disclosure regarding the nature of restrictions on a company’s cash and cash equivalents, such as the purpose and terms of the restriction, expected duration of the restriction and the amount of cash subject to restriction. The guidance was effective for annual periods beginning after December 15, 2017, including interim periods within that reporting period. The Company adopted ASU 2016-18 as of January 1, 2018. As a result of adopting ASU 2016-18, the beginning and ending cash balances within the unaudited Condensed Consolidated Statements of Cash Flows now include restricted cash as of June 30, 2018 and 2017 . The impact of the adoption of this standard on the Company’s unaudited Condensed Consolidated Statements of Cash Flows is disclosed above in the cash and cash equivalents section of this footnote. In January 2017, the FASB issued Accounting Standards Board Update No. 2017-01: Clarifying the Definition of a Business (Topic 805) (“ASU 2017-01”). ASU 2017-01 clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The definition of a business affects many areas of accounting including acquisitions, disposals, goodwill, and consolidation. The guidance was effective for annual periods beginning after December 15, 2017, including interim periods within that reporting period. The Company adopted ASU 2017-01 as of January 1, 2018 and the adoption of this standard had no impact on the Company’s financial statements. In March 2017, the FASB issued Accounting Standards Board Update No. 2017-07: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (“ASU 2017-07”). ASU 2017-07 requires that an employer report the service cost component of its net periodic pension and postretirement benefit costs (“net benefit cost”) in the same line item or items as other compensation costs arising from services rendered by employees during the period. Additionally, ASU 2017-07 only allows the service cost component of net benefit cost to be eligible for capitalization into inventory. All other components of net benefit cost, which primarily include interest cost, expected return on assets and the annual mark-to-market liability remeasurement, are required to be presented in the income statement separately from the service cost component and outside of income from operations. The guidance was effective for annual periods beginning after December 15, 2017, including interim periods within that reporting period. The Company adopted ASU 2017-07 as of January 1, 2018. The components of the net (benefit) cost are shown in Note 8. The impact of these pension and OPEB accounting policy changes were applied through retrospective adoption of the new ASU 2017-07 to all periods presented. Accordingly, all relevant information for the three and six months ended June 30, 2018 and all prior periods has been adjusted to reflect the application of the changes. The effects of the changes to the unaudited Condensed Consolidated Statements of Operations are as follows: Unaudited Condensed Consolidated Statements of Operations for the three months ended June 30, 2017: Previous Accounting Method Effect of Accounting Change As Reported Selling, general and administrative expense $ 75 $ 2 $ 77 Operating income 40 (2 ) 38 Other non-operating expense (income), net (5 ) (2 ) (7 ) Unaudited Condensed Consolidated Statements of Operations for the six months ended June 30, 2017: Previous Accounting Method Effect of Accounting Change As Reported Selling, general and administrative expense $ 152 $ 4 $ 156 Operating income 95 (4 ) 91 Other non-operating expense (income), net (1 ) (4 ) (5 )
New Accounting Pronouncements, Policy [Policy Text Block]	Newly Issued Accounting Standards In February 2016, the FASB issued Accounting Standards Board Update No. 2016-02: Leases (Topic 842) (“ASU 2016-02”). ASU 2016-02 supersedes the existing lease guidance in Topic 840. According to the new guidance, all leases, with limited scope exceptions, will be recorded on the balance sheet in the form of a liability to make lease payments (lease liability) and a right-of-use asset representing the right to use the underlying asset for the lease term. The guidance is effective for annual and interim periods beginning on or after December 15, 2018. The Company plans to adopt ASU 2016-02 on a prospective basis. The Company is currently assessing the potential impact of this standard on its financial statements through a formalized implementation project and is in process of implementing a software solution to facilitate the development of reporting and disclosure processes and controls around leases to meet the new accounting and disclosure requirements upon adoption in January 2019. In February 2018, the FASB issued Accounting Standards Board Update No. 2018-02: Income Statement-Reporting Comprehensive Income (Topic 220) (“ASU 2018-02”). ASU 2018-02 was issued in response to the United States tax reform legislation, the Tax Cuts and Jobs Act (“Tax Reform”), enacted in December 2017. The amendments in ASU 2018-02 allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the new tax legislation. The guidance is effective for annual and interim periods beginning on or after December 15, 2018, and early adoption is permitted. The Company is currently assessing the potential impact of ASU 2018-02 on its financial statements.

Significant Accounting Polici22

Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2018
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]	Recently Issued Accounting Standards Newly Adopted Accounting Standards In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Board Update No. 2014-09: Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”). ASU 2014-09 supersedes the existing revenue recognition guidance and most industry-specific guidance applicable to revenue recognition. According to the new guidance, an entity will apply a principles-based five step model to recognize revenue upon the transfer of promised goods or services to customers and in an amount that reflects the consideration for which the entity expects to be entitled in exchange for those goods or services. The effective date for ASU 2014-09 was for annual and interim periods beginning on or after December 15, 2017. The Company adopted ASU 2014-09 as of January 1, 2018 utilizing a modified retrospective approach, which resulted in a cumulative adjustment to “Accumulated deficit” of $1 on the date of adoption. ASU 2014-09 was applied to all open contracts as of the date of adoption and resulted only in timing differences for recognition of certain revenue items. The cumulative effects of the changes made to the Company’s unaudited Condensed Consolidated Balance Sheet on January 1, 2018 for the adoption of ASU 2014-09 were as follows: Balance at December 31, 2017 Adjustments due to ASU 2014-09 Balance at January 1, 2018 Assets Inventory $ 221 $ (11 ) $ 210 Other current assets 44 12 56 Deficit Accumulated deficit (2,964 ) 1 (2,963 ) In accordance with the new revenue standard requirements, the impact of adoption on the Company’s unaudited Condensed Consolidated Statements of Operations and unaudited Condensed Consolidated Balance Sheets were as follows: Income Statement For the three months ended June 30, 2018 For the six months ended June 30, 2018 As reported Balances without Adoption of ASC 606 Effect of change higher/(lower) As reported Balances without Adoption of ASC 606 Effect of change higher/(lower) Net sales $ 995 $ 995 $ — $ 1,941 $ 1,940 $ 1 Cost of sales 829 830 (1 ) 1,618 1,619 (1 ) Gross profit 166 165 1 323 321 2 Balance Sheet Balance at June 30, 2018 Assets As reported Balances without Adoption of ASC 606 Effect of change higher/(lower) Inventory $ 245 $ 254 $ (9 ) Other current assets 62 50 12 Deficit Accumulated deficit (2,998 ) (3,001 ) 3 In August 2016, the FASB issued Accounting Standards Board Update No. 2016-15: Statement of Cash Flows (Topic 230) (“ASU 2016-15”) as part of the FASB simplification initiative. ASU 2016-15 provides guidance on treatment in the statement of cash flows for eight specific cash flow topics, with the objective of reducing existing diversity in practice. Of the eight cash flow topics addressed in the new guidance, the topics expected to have an impact on the Company include debt prepayment or debt extinguishment costs, accounts receivable factoring, proceeds from the settlement of insurance claims and distributions received from equity method investees. The guidance was effective for annual periods beginning after December 15, 2017, including interim periods within that reporting period. The Company adopted ASU 2016-15 as of January 1, 2018 and adoption of this standard had an immaterial impact on the Company’s financial statements. In November 2016, the FASB issued Accounting Standards Board Update No. 2016-18: Statement of Cash Flows (Topic 230) Restricted Cash (“ASU 2016-18”) as part of the FASB simplification initiative. ASU 2016-18 requires that amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of period total amounts shown on the statement of cash flows. ASU 2016-18 also requires supplemental disclosure regarding the nature of restrictions on a company’s cash and cash equivalents, such as the purpose and terms of the restriction, expected duration of the restriction and the amount of cash subject to restriction. The guidance was effective for annual periods beginning after December 15, 2017, including interim periods within that reporting period. The Company adopted ASU 2016-18 as of January 1, 2018. As a result of adopting ASU 2016-18, the beginning and ending cash balances within the unaudited Condensed Consolidated Statements of Cash Flows now include restricted cash as of June 30, 2018 and 2017 . The impact of the adoption of this standard on the Company’s unaudited Condensed Consolidated Statements of Cash Flows is disclosed above in the cash and cash equivalents section of this footnote. In January 2017, the FASB issued Accounting Standards Board Update No. 2017-01: Clarifying the Definition of a Business (Topic 805) (“ASU 2017-01”). ASU 2017-01 clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The definition of a business affects many areas of accounting including acquisitions, disposals, goodwill, and consolidation. The guidance was effective for annual periods beginning after December 15, 2017, including interim periods within that reporting period. The Company adopted ASU 2017-01 as of January 1, 2018 and the adoption of this standard had no impact on the Company’s financial statements. In March 2017, the FASB issued Accounting Standards Board Update No. 2017-07: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (“ASU 2017-07”). ASU 2017-07 requires that an employer report the service cost component of its net periodic pension and postretirement benefit costs (“net benefit cost”) in the same line item or items as other compensation costs arising from services rendered by employees during the period. Additionally, ASU 2017-07 only allows the service cost component of net benefit cost to be eligible for capitalization into inventory. All other components of net benefit cost, which primarily include interest cost, expected return on assets and the annual mark-to-market liability remeasurement, are required to be presented in the income statement separately from the service cost component and outside of income from operations. The guidance was effective for annual periods beginning after December 15, 2017, including interim periods within that reporting period. The Company adopted ASU 2017-07 as of January 1, 2018. The components of the net (benefit) cost are shown in Note 8. The impact of these pension and OPEB accounting policy changes were applied through retrospective adoption of the new ASU 2017-07 to all periods presented. Accordingly, all relevant information for the three and six months ended June 30, 2018 and all prior periods has been adjusted to reflect the application of the changes. The effects of the changes to the unaudited Condensed Consolidated Statements of Operations are as follows: Unaudited Condensed Consolidated Statements of Operations for the three months ended June 30, 2017: Previous Accounting Method Effect of Accounting Change As Reported Selling, general and administrative expense $ 75 $ 2 $ 77 Operating income 40 (2 ) 38 Other non-operating expense (income), net (5 ) (2 ) (7 ) Unaudited Condensed Consolidated Statements of Operations for the six months ended June 30, 2017: Previous Accounting Method Effect of Accounting Change As Reported Selling, general and administrative expense $ 152 $ 4 $ 156 Operating income 95 (4 ) 91 Other non-operating expense (income), net (1 ) (4 ) (5 )

Restructuring (Tables)

Restructuring (Tables)	6 Months Ended
	Jun. 30, 2018
Restructuring and Related Activities [Abstract]
Restructuring and Related Costs	The following table summarizes restructuring information by reporting segment: Epoxy, Phenolic and Coating Resins Forest Products Resins Corporate and Other Total Total restructuring costs expected to be incurred $ 14 $ 9 $ 4 $ 27 Total restructuring costs incurred through June 30, 2018 $ 12 $ 8 $ 4 $ 24 Accrued liability at December 31, 2017 $ 11 $ 3 $ 3 $ 17 Restructuring charges and adjustments — 3 1 4 Payments (7 ) (3 ) (1 ) (11 ) Accrued liability at June 30, 2018 $ 4 $ 3 $ 3 $ 10

Related Party Transactions (Tab

Related Party Transactions (Tables)	6 Months Ended
	Jun. 30, 2018
Related Party Transaction [Line Items]
Schedule of Related Party Transactions [Table Text Block]	Pursuant to the Shared Services Agreement, the below table summarizes the transactions between the Company and MPM: Six Months Ended June 30, 2018 2017 Net costs incurred by Hexion $ 19 $ 31 Net costs incurred by MPM (1) 14 23 (1) Included in the net costs incurred during the six months ended June 30, 2018 and 2017 , were net billings from Hexion to MPM of $9 and $15 , respectively, to bring the percentage of total net incurred costs for shared services under the Shared Services Agreement to the applicable agreed upon allocation percentage. June 30, 2018 December 31, 2017 Accounts receivable from MPM $ 1 $ 3 Sales and Purchases of Products with MPM The Company also sells products to, and purchases products from, MPM. During the three months ended June 30, 2017, the Company sold less that $1 of products to MPM and there were no products sold during the three months ended June 30, 2018. During the six months ended June 30, 2018 and 2017, the Company sold less than $1 of products to MPM. During the three and six months ended June 30, 2018 and 2017, the company earned less that $1 from MPM as compensation for acting as distributor of products. Refer to the below table for the summary of the purchases of products with MPM: Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 Purchases from MPM $ 9 $ 7 $ 16 $ 12 June 30, 2018 December 31, 2017 Accounts payable to MPM $ 3 $ 2 Other Transactions and Arrangements The Company sells products and provides services to, and purchases products from, its joint ventures which are recorded under the equity method of accounting. Refer to the below table for a summary of the sales and purchases with the Company and its joint ventures which are recorded under the equity method of accounting: Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 Sales to joint ventures $ 3 $ 4 $ 6 $ 8 Purchases from joint ventures 3 3 5 7 June 30, 2018 December 31, 2017 Accounts receivable from joint ventures $ 7 $ 6 Accounts payable to joint ventures < 1 1

Fair Value (Tables)

Fair Value (Tables)	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Non-derivative Financial Instruments Fair Value	The following table summarizes the carrying amount and fair value of the Company’s non-derivative financial instruments: Carrying Amount (1) Fair Value Level 1 Level 2 Level 3 Total June 30, 2018 Debt $ 3,795 $ — $ 3,449 $ 65 $ 3,514 December 31, 2017 Debt $ 3,750 $ — $ 3,206 $ 49 $ 3,255 (1) Debt carrying amounts exclude unamortized deferred debt issuance costs of $35 and $41 at June 30, 2018 and December 31, 2017 , respectively.

Debt Obligations (Tables)

Debt Obligations (Tables)	6 Months Ended
	Jun. 30, 2018
Debt Disclosure [Abstract]
Schedule of Long-term Debt	Debt outstanding at June 30, 2018 and December 31, 2017 is as follows: June 30, 2018 December 31, 2017 Long-Term Due Within One Year Long-Term Due Within One Year ABL Facility $ 120 $ — $ 81 $ — Senior Secured Notes: 6.625% First-Priority Senior Secured Notes due 2020 (includes $2 of unamortized debt premium) 1,552 — 1,552 — 10.00% First-Priority Senior Secured Notes due 2020 315 — 315 — 10.375% First-Priority Senior Secured Notes due 2022 560 — 560 — 13.75% Senior Secured Notes due 2022 225 — 225 — 9.00% Second-Priority Senior Secured Notes due 2020 574 — 574 — Debentures: 9.2% debentures due 2021 74 — 74 — 7.875% debentures due 2023 189 — 189 — Other Borrowings: Australia Facility due 2021 (1) 33 4 — 50 Brazilian bank loans 10 37 9 34 Lease obligations 57 8 44 5 Other 4 33 2 36 Unamortized debt issuance costs (35 ) — (41 ) — Total $ 3,678 $ 82 $ 3,584 $ 125 (1) In February 2018, the Company extended its Australian Term Loan Facility through January 2021.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Schedule of Environmental Loss Contingencies by Site	The following table summarizes all probable environmental remediation, indemnification and restoration liabilities, including related legal expenses, at June 30, 2018 and December 31, 2017 : Liability Range of Reasonably Possible Costs at June 30, 2018 Site Description June 30, 2018 December 31, 2017 Low High Geismar, LA $ 13 $ 14 $ 9 $ 22 Superfund and offsite landfills – allocated share: Less than 1% 2 2 1 4 Equal to or greater than 1% 6 6 5 14 Currently-owned 4 4 3 9 Formerly-owned: Remediation 23 26 21 39 Monitoring only — — — 1 Total $ 48 $ 52 $ 39 $ 89

Pension and Postretirement Ex28

Pension and Postretirement Expense (Tables)	6 Months Ended
	Jun. 30, 2018
Defined Benefit Plan [Abstract]
Schedule of Components of Net Benefit Cost	Following are the components of net benefit cost recognized by the Company for the three and six months ended June 30, 2018 and 2017 : Pension Benefits Non-Pension Postretirement Benefits Three Months Ended June 30, Three Months Ended June 30, 2018 2017 2018 2017 U.S. Non-U.S. U.S. Non-U.S. U.S. Plans Non-U.S. Plans U.S. Plans Non-U.S. Plans Service cost $ — $ 5 $ — $ 4 $ — $ — $ — $ — Interest cost on projected benefit obligation 2 2 2 2 — — — 1 Expected return on assets (3 ) (3 ) (3 ) (3 ) — — — — Net (benefit) expense $ (1 ) $ 4 $ (1 ) $ 3 $ — $ — $ — $ 1 Pension Benefits Non-Pension Postretirement Benefits Six Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 U.S. Plans Non-U.S. Plans U.S. Plans Non-U.S. Plans U.S. Plans Non-U.S. Plans U.S. Plans Non-U.S. Plans Service cost $ 1 $ 9 $ 1 $ 8 $ — $ — $ — $ — Interest cost on projected benefit obligation 4 5 4 4 — — — 1 Expected return on assets (7 ) (6 ) (7 ) (5 ) — — — — Net (benefit) expense $ (2 ) $ 8 $ (2 ) $ 7 $ — $ — $ — $ 1

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2018
Segment Reporting [Abstract]
Segment Sales by Geographic Region	Following is net sales by reportable segment disaggregated by geographic region: Three Months Ended June 30, 2018 Three Months Ended June 30, 2017 Epoxy, Phenolic and Coating Resins Forest Products Resins Total Epoxy, Phenolic and Coating Resins Forest Products Resins Total North America $ 237 $ 294 $ 531 $ 207 $ 268 $ 475 Europe 249 52 301 223 48 271 Asia Pacific 77 35 112 85 34 119 Latin America 1 50 51 2 45 47 Total $ 564 $ 431 $ 995 $ 517 $ 395 $ 912 Six Months Ended June 30, 2018 Six Months Ended June 30, 2017 Epoxy, Phenolic and Coating Resins Forest Products Resins Total Epoxy, Phenolic and Coating Resins Forest Products Resins Total North America $ 470 $ 562 $ 1,032 $ 408 $ 519 $ 927 Europe 494 106 600 445 96 541 Asia Pacific 138 66 204 152 65 217 Latin America 2 103 105 4 93 97 Total $ 1,104 $ 837 $ 1,941 $ 1,009 $ 773 $ 1,782 (1) Intersegment sales are not significant and, as such, are eliminated within the selling segment
Reconciliation of Segment EBITDA to Net Income	Reconciliation of Net Loss to Segment EBITDA: Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 Reconciliation: Net loss attributable to Hexion Inc. $ (22 ) $ (34 ) $ (35 ) $ (76 ) Net income attributable to noncontrolling interest (1 ) — (1 ) — Net loss (21 ) (34 ) (34 ) (76 ) Income tax expense (benefit) 3 (1 ) 11 7 Interest expense, net 84 82 167 165 Depreciation and amortization 28 28 58 56 EBITDA $ 94 $ 75 $ 202 $ 152 Items not included in Segment EBITDA: Asset impairments $ — $ — $ 25 $ — Business realignment costs 5 10 14 17 Gain on disposition — — (44 ) — Realized and unrealized foreign currency losses (gains) 15 (1 ) 22 (2 ) Loss on extinguishment of debt — — — 3 Other 14 16 27 25 Total adjustments 34 25 44 43 Segment EBITDA $ 128 $ 100 $ 246 $ 195 Segment EBITDA: Epoxy, Phenolic and Coating Resins $ 72 $ 46 $ 142 $ 98 Forest Products Resins 76 68 143 129 Corporate and Other (20 ) (14 ) (39 ) (32 ) Total $ 128 $ 100 $ 246 $ 195

Changes in Accumulated Other 30

Changes in Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2018
Changes of Accumulated Other Comprehensive Income [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	Following is a summary of changes in “Accumulated other comprehensive loss” for the three and six months ended June 30, 2018 and 2017 : Three Months Ended June 30, 2018 Three Months Ended June 30, 2017 Defined Benefit Pension and Postretirement Plans Foreign Currency Translation Adjustments Total Defined Benefit Pension and Postretirement Plans Foreign Currency Translation Adjustments Total Beginning balance $ 1 $ 5 $ 6 $ 3 $ (36 ) $ (33 ) Other comprehensive (loss) income before reclassifications, net of tax — (16 ) (16 ) — 9 9 Ending balance $ 1 $ (11 ) $ (10 ) $ 3 $ (27 ) $ (24 ) Six Months Ended June 30, 2018 Six Months Ended June 30, 2017 Defined Benefit Pension and Postretirement Plans Foreign Currency Translation Adjustments Total Defined Benefit Pension and Postretirement Plans Foreign Currency Translation Adjustments Total Beginning balance $ 1 $ (9 ) $ (8 ) $ 3 $ (42 ) $ (39 ) Other comprehensive (loss) income before reclassifications, net of tax — (2 ) (2 ) — 15 15 Ending balance $ 1 $ (11 ) $ (10 ) $ 3 $ (27 ) $ (24 )

Guarantor Non-Guarantor Subsi31

Guarantor Non-Guarantor Subsidiary Financial Information (Tables)	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Guarantor Non Guarantor Subsidary Financial Information [Abstract]
Condensed Consolidating Balance Sheet	HEXION INC. JUNE 30, 2018 CONDENSED CONSOLIDATING BALANCE SHEET (Unaudited) Hexion Inc. Combined Subsidiary Guarantors Combined Non-Guarantor Subsidiaries Eliminations Consolidated Assets Current assets: Cash and cash equivalents (including restricted cash of $0 and $16, respectively) $ 42 $ — $ 88 $ — $ 130 Accounts receivable, net 116 1 356 — 473 Intercompany accounts receivable 58 — 56 (114 ) — Intercompany loans receivable - current portion 123 — — (123 ) — Inventories: Finished and in-process goods 97 — 148 — 245 Raw materials and supplies 39 — 64 — 103 Other current assets 23 — 39 — 62 Total current assets 498 1 751 (237 ) 1,013 Investment in unconsolidated entities 144 14 21 (157 ) 22 Deferred income taxes — — 9 — 9 Other assets, net 13 7 22 — 42 Intercompany loans receivable 1,098 — 135 (1,233 ) — Property and equipment, net 374 — 484 — 858 Goodwill 52 — 58 — 110 Other intangible assets, net 23 — 9 — 32 Total assets $ 2,202 $ 22 $ 1,489 $ (1,627 ) $ 2,086 Liabilities and Deficit Current liabilities: Accounts payable $ 130 $ — $ 267 $ — $ 397 Intercompany accounts payable 56 — 58 (114 ) — Debt payable within one year 8 — 74 — 82 Intercompany loans payable within one year — — 123 (123 ) — Interest payable 81 — 1 — 82 Income taxes payable 5 — 5 — 10 Accrued payroll and incentive compensation 31 — 29 — 60 Other current liabilities 69 — 50 — 119 Total current liabilities 380 — 607 (237 ) 750 Long-term liabilities: Long-term debt 3,520 — 158 — 3,678 Intercompany loans payable 135 — 1,098 (1,233 ) — Accumulated losses of unconsolidated subsidiaries in excess of investment 804 157 — (961 ) — Long-term pension and post employment benefit obligations 29 — 217 — 246 Deferred income taxes 1 — 10 — 11 Other long-term liabilities 110 — 68 — 178 Total liabilities 4,979 157 2,158 (2,431 ) 4,863 Total deficit (2,777 ) (135 ) (669 ) 804 (2,777 ) Total liabilities and deficit $ 2,202 $ 22 $ 1,489 $ (1,627 ) $ 2,086 HEXION INC. DECEMBER 31, 2017 CONDENSED CONSOLIDATING BALANCE SHEET Hexion Inc. Combined Subsidiary Guarantors Combined Non-Guarantor Subsidiaries Eliminations Consolidated Assets Current assets: Cash and cash equivalents (including restricted cash of $0 and $18, respectively) $ 13 $ — $ 102 $ — $ 115 Accounts receivable, net 126 1 335 — 462 Intercompany accounts receivable 121 — 80 (201 ) — Intercompany loans receivable - current portion 1 — 22 (23 ) — Inventories: Finished and in-process goods 85 — 136 — 221 Raw materials and supplies 36 — 56 — 92 Current assets held-for-sale 1 — 5 — 6 Other current assets 19 — 25 — 44 Total current assets 402 1 761 (224 ) 940 Investment in unconsolidated entities 158 13 20 (171 ) 20 Deferred income taxes — — 8 — 8 Long-term assets held for sale — — 2 — 2 Other long-term assets 17 8 24 — 49 Intercompany loans receivable 1,114 — 190 (1,304 ) — Property and equipment, net 410 — 514 — 924 Goodwill 52 — 60 — 112 Other intangible assets, net 32 — 10 — 42 Total assets $ 2,185 $ 22 $ 1,589 $ (1,699 ) $ 2,097 Liabilities and Deficit Current liabilities: Accounts payable $ 129 $ — $ 273 $ — $ 402 Intercompany accounts payable 80 — 121 (201 ) — Debt payable within one year 10 — 115 — 125 Intercompany loans payable within one year 22 — 1 (23 ) — Interest payable 80 — 2 — 82 Income taxes payable 6 — 6 — 12 Accrued payroll and incentive compensation 22 — 25 — 47 Current liabilities associated with assets held for sale — — 2 — 2 Other current liabilities 70 — 65 — 135 Total current liabilities 419 — 610 (224 ) 805 Long term liabilities: Long-term debt 3,507 — 77 — 3,584 Intercompany loans payable 190 — 1,114 (1,304 ) — Accumulated losses of unconsolidated subsidiaries in excess of investment 668 171 — (839 ) — Long-term pension and post employment benefit obligations 31 — 231 — 262 Deferred income taxes 2 — 9 — 11 Other long-term liabilities 109 — 68 — 177 Total liabilities 4,926 171 2,109 (2,367 ) 4,839 Total Hexion Inc. shareholder’s deficit (2,741 ) (149 ) (519 ) 668 (2,741 ) Noncontrolling interest — — (1 ) — (1 ) Total deficit (2,741 ) (149 ) (520 ) 668 (2,742 ) Total liabilities and deficit $ 2,185 $ 22 $ 1,589 $ (1,699 ) $ 2,097
Condensed Consolidating Statement of Operations	HEXION INC. THREE MONTHS ENDED JUNE 30, 2018 CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS (Unaudited) Hexion Inc. Combined Subsidiary Guarantors Combined Non-Guarantor Subsidiaries Eliminations Consolidated Net sales $ 460 $ — $ 583 $ (48 ) $ 995 Cost of sales 370 — 507 (48 ) 829 Gross profit 90 — 76 — 166 Selling, general and administrative expense 44 — 33 — 77 Business realignment costs 3 — 2 — 5 Other operating expense, net 3 — 8 — 11 Operating income 40 — 33 — 73 Interest expense, net 80 — 4 — 84 Intercompany interest (income) expense, net (21 ) — 21 — — Other non-operating expense (income), net 36 — (28 ) — 8 (Loss) income before tax and earnings from unconsolidated entities (55 ) — 36 — (19 ) Income tax expense 1 — 2 — 3 (Loss) income before earnings from unconsolidated entities (56 ) — 34 — (22 ) Earnings from unconsolidated entities, net of taxes 34 17 1 (51 ) 1 Net (loss) income (22 ) 17 35 (51 ) (21 ) Net income attributable to noncontrolling interest — — (1 ) — (1 ) Net (loss) income attributable to Hexion Inc. $ (22 ) $ 17 $ 34 $ (51 ) $ (22 ) Comprehensive (loss) income attributable to Hexion Inc. $ (38 ) $ 16 $ 35 $ (51 ) $ (38 )	HEXION INC. THREE MONTHS ENDED JUNE 30, 2017 CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS (Unaudited) Hexion Inc. Combined Subsidiary Guarantors Combined Non-Guarantor Subsidiaries Eliminations Consolidated Net sales $ 417 $ — $ 550 $ (55 ) $ 912 Cost of sales 355 — 478 (55 ) 778 Gross profit 62 — 72 — 134 Selling, general and administrative expense 34 — 43 — 77 Business realignment costs 6 — 4 — 10 Other operating income, net 3 — 6 — 9 Operating income 19 — 19 — 38 Interest expense, net 78 — 4 — 82 Intercompany interest (income) expense, net (18 ) — 18 — — Other non-operating (income) expense, net (50 ) — 43 — (7 ) Income (loss) before income tax and (losses) earnings from unconsolidated entities 9 — (46 ) — (37 ) Income tax expense (benefit) 2 — (3 ) — (1 ) Income (loss) before (losses) earnings from unconsolidated entities 7 — (43 ) — (36 ) (Losses) earnings from unconsolidated entities, net of taxes (41 ) (32 ) 1 74 2 Net loss $ (34 ) $ (32 ) $ (42 ) $ 74 $ (34 ) Comprehensive loss $ (25 ) $ (31 ) $ (46 ) $ 77 $ (25 ) HEXION INC. SIX MONTHS ENDED JUNE 30, 2018 CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS (Unaudited) Hexion Combined Combined Eliminations Consolidated Net sales $ 891 $ — $ 1,153 $ (103 ) $ 1,941 Cost of sales 727 — 994 (103 ) 1,618 Gross profit 164 — 159 — 323 Selling, general and administrative expense 80 — 79 — 159 Gain on disposition (24 ) — (20 ) — (44 ) Asset impairments 25 — — — 25 Business realignment costs 9 — 5 — 14 Other operating expense, net 3 — 17 — 20 Operating income 71 — 78 — 149 Interest expense, net 159 — 8 — 167 Intercompany interest (income) expense, net (41 ) — 41 — — Other non-operating expense (income), net 17 — (10 ) — 7 (Loss) income before tax and earnings from unconsolidated entities (64 ) — 39 — (25 ) Income tax expense (6 ) — 17 — 11 (Loss) income before earnings earnings from unconsolidated entities (58 ) — 22 — (36 ) Earnings from unconsolidated entities, net of taxes 23 14 2 (37 ) 2 Net (loss) income (35 ) 14 24 (37 ) (34 ) Net income attributable to noncontrolling interest — — (1 ) — (1 ) Net (loss) income attributable to Hexion Inc. $ (35 ) $ 14 $ 23 $ (37 ) $ (35 ) Comprehensive (loss) income $ (37 ) $ 14 $ 37 $ (51 ) $ (37 ) HEXION INC. SIX MONTHS ENDED JUNE 30, 2017 CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS (Unaudited) Hexion Combined Combined Eliminations Consolidated Net sales $ 795 $ — $ 1,093 $ (106 ) $ 1,782 Cost of sales 677 — 944 (106 ) 1,515 Gross profit 118 — 149 — 267 Selling, general and administrative expense 67 — 89 — 156 Business realignment costs 10 — 7 — 17 Other operating (income) expense, net (3 ) — 6 — 3 Operating income 44 — 47 — 91 Interest expense, net 158 — 7 — 165 Intercompany interest (income) expense, net (35 ) — 35 — — Loss on extinguishment of debt 3 — — — 3 Other non-operating (income) expense, net (58 ) — 53 — (5 ) Loss before income tax and (losses) earnings from unconsolidated entities (24 ) — (48 ) — (72 ) Income tax (benefit) expense (4 ) — 11 — 7 Loss before (losses) earnings from unconsolidated entities (20 ) — (59 ) — (79 ) (Losses) earnings from unconsolidated entities, net of taxes (56 ) (34 ) 2 91 3 Net loss $ (76 ) $ (34 ) $ (57 ) $ 91 $ (76 ) Comprehensive loss $ (61 ) $ (34 ) $ (49 ) $ 83 $ (61 )
Condensed Consolidating Statement of Cash Flows	HEXION INC. SIX MONTHS ENDED JUNE 30, 2018 CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS (Unaudited) Hexion Inc. (b) Combined Subsidiary Guarantors Combined Non-Guarantor Subsidiaries (b) Eliminations Consolidated Cash flows (used in) provided by operating activities $ (185 ) $ — $ 143 $ — $ (42 ) Cash flows provided by (used in) investing activities Capital expenditures (13 ) — (30 ) — (43 ) Proceeds from disposition, net 24 — 25 — 49 Proceeds from sale of assets, net — — 1 — 1 Return of capital from subsidiary from sales of accounts receivable 172 (a) — — (172 ) — 183 — (4 ) (172 ) 7 Cash flows provided by (used in) financing activities Net short-term debt borrowings (5 ) — 8 — 3 Borrowings of long-term debt 150 — 144 — 294 Repayments of long-term debt (140 ) — (103 ) — (243 ) Net intercompany loan borrowings (repayments) 26 — (26 ) — — Long-term debt and credit facility financing fees paid — — (1 ) — (1 ) Return of capital to parent from sales of accounts receivable — — (172 ) (a) 172 — 31 — (150 ) 172 53 Effect of exchange rates on cash and cash equivalents — — (3 ) — (3 ) Change in cash and cash equivalents 29 — (14 ) — 15 Cash and cash equivalents at beginning of period 13 — 102 — 115 Cash and cash equivalents at end of period $ 42 $ — $ 88 $ — $ 130 (a) During the six months ended June 30, 2018 , Hexion Inc. contributed receivables of $172 to a non-guarantor subsidiary as capital contributions, resulting in a non-cash transaction. During the six months ended June 30, 2018 , the non-guarantor subsidiary sold the contributed receivables to certain banks under various supplier financing agreements. The cash proceeds were returned to Hexion Inc. by the non-guarantor subsidiary as a return of capital. The sale of receivables has been included within cash flows from operating activities on the Combined non-guarantor subsidiaries. The return of the cash proceeds from the sale of receivables has been included as a financing outflow and an investing inflow on the Combined Non-Guarantor Subsidiaries and Hexion Inc., respectively. (b) Reflected in the “Hexion Inc.” and the “Combined Non-Guarantor Subsidiaries” columns is a correction of an error presented in the three months ended March 31, 2018 Condensed Consolidating Statement of Cash Flows. The impact of this correction is a decrease of $42 to “Cash flows (used in) provided by operating activities” and “Net intercompany loan borrowings (repayments)” for the “Hexion Inc.” and “Combined Non-guarantor Subsidiaries” columns, respectively, and an increase of $42 to “Net intercompany loan borrowings (repayments)” and “Cash flows (used in) provided by operating activities” for the “Hexion Inc.” and “Combined Non-Guarantor Subsidiaries” columns, respectively. Management does not believe that this error correction is material to the unaudited Condensed Consolidated Financial Statements for the three months ended March 31, 2018 or the six months ended June 30, 2018. HEXION INC. SIX MONTHS ENDED JUNE 30, 2017 CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS (Unaudited) Hexion Inc. Combined Subsidiary Guarantors Combined Non-Guarantor Subsidiaries Eliminations Consolidated Cash flows used in operating activities $ (186 ) $ — $ (9 ) $ — $ (195 ) Cash flows provided by (used in) investing activities Capital expenditures (23 ) — (34 ) — (57 ) Proceeds from sale of assets, net 4 — — — 4 Return of capital from subsidiary from sales of accounts receivable 68 (a) — — (68 ) — 49 — (34 ) (68 ) (53 ) Cash flows provided by (used in) financing activities Net short-term debt (repayments) borrowings (5 ) — 13 — 8 Borrowings of long-term debt 915 — 204 — 1,119 Repayments of long-term debt (801 ) — (127 ) — (928 ) Net intercompany loan borrowings (repayments) 31 — (31 ) — — Long-term debt and credit facility financing fees (20 ) — (4 ) — (24 ) Return of capital to parent from sales of accounts receivable — — (68 ) (a) 68 — 120 — (13 ) 68 175 Effect of exchange rates on cash and cash equivalents — — 5 — 5 Change in cash and cash equivalents (17 ) — (51 ) — (68 ) Cash and cash equivalents at beginning of period 28 — 168 — 196 Cash and cash equivalents at end of period $ 11 $ — $ 117 $ — $ 128 (a) During the six months ended June 30, 2017 , Hexion Inc. contributed receivables of $68 to a non-guarantor subsidiary as capital contributions, resulting in a non-cash transaction. During the six months ended June 30, 2017 , the non-guarantor subsidiary sold the contributed receivables to certain banks under various supplier financing agreements. The cash proceeds were returned to Hexion Inc. by the non-guarantor subsidiary as a return of capital. The sale of receivables has been included within cash flows from operating activities on the Combined non-guarantor subsidiaries. The return of the cash proceeds from the sale of receivables has been included as a financing outflow and an investing inflow on the Combined Non-Guarantor Subsidiaries and Hexion Inc., respectively.

Background and Basis of Prese32

Background and Basis of Presentation (Details) - Number of Reportable Segments	6 Months Ended
	Jun. 30, 2018Segments
Segment Reporting Information [Line Items]
Number of Reportable Segments	3

Significant Accounting Polici33

Significant Accounting Policies (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2016
Net sales	$ 995	$ 912	$ 1,941	$ 1,782
Cost of sales	829	778	1,618	1,515
Inventory, Net					$ 210
Restricted Cash and Cash Equivalents, Current	16		16			$ 18
Net cash (used in) provided by investing activities			7	(53)
Effect of exchange rates on cash and cash equivalents			(3)	5
Change in cash and cash equivalents			15	(68)
Restricted Cash		18		18			$ 17
Cash and cash equivalents (including restricted cash of $0 and $16, respectively)	130	128	130	128		115	196
Other current assets	62		62		56	44
Accumulated deficit	(2,998)		(2,998)		$ (2,963)	(2,964)
Gross profit	166	134	323	267
Finished and in-process goods	245		245			221
Selling, general and administrative expense	77	77	159	156
Operating Income (Loss)	73	38	149	91
Other non-operating expense (income), net	8	(7)	7	(5)
Epoxy, Phenolic and Coating Resins
Net sales	564	517	1,104	1,009
Forest Products Resins
Net sales	431	395	837	773
Previous Accounting Guidance [Member]
Increase (Decrease) in Restricted Cash				1
Net cash (used in) provided by investing activities				(52)
Effect of exchange rates on cash and cash equivalents				3
Change in cash and cash equivalents				(69)
Cash and Cash Equivalents, at Carrying Value		110		110			$ 179
Previous Accounting Guidance [Member]
Net sales	995		1,940
Cost of sales	830		1,619
Inventory, Net	254		254
Other assets, current under previous accounting guidance	50		50
Accumulated deficit under previous accounting guidance	(3,001)		(3,001)
Gross profit	165		321
Selling, general and administrative expense		75		152
Operating Income (Loss)		40		95
Other non-operating expense (income), net		5		1
Adjustments for New Accounting Pronouncement [Member]
Contract with Customer, Asset, Net	12		12
Net sales	0		1
Cost of sales	(1)		(1)
Inventory, Net	(9)		(9)			(11)
Increase (Decrease) in Restricted Cash				(1)
Effect of exchange rates on cash and cash equivalents				2
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect				1
Other current assets						12
Accumulated deficit	3		3			$ 1
Gross profit	$ 1		$ 2
Selling, general and administrative expense		2		4
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Operating Results		(2)		(4)
Other non-operating expense (income), net		$ 2		$ 4

Restructuring Restructuring and

Restructuring Restructuring and Cost Reduction Programs (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 27
Restructuring Reserve	10	$ 17
Restructuring expense	4
Payments for Restructuring	(11)
Restructuring and Related Cost, Cost Incurred to Date	24
Epoxy, Phenolic and Coating Resins
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	14
Restructuring Reserve	4	11
Restructuring expense	0
Payments for Restructuring	(7)
Restructuring and Related Cost, Cost Incurred to Date	12
Forest Products Resins
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	9
Restructuring Reserve	3	3
Restructuring expense	3
Payments for Restructuring	(3)
Restructuring and Related Cost, Cost Incurred to Date	8
Corporate and Other [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	4
Restructuring Reserve	3	$ 3
Restructuring expense	1
Payments for Restructuring	(1)
Restructuring and Related Cost, Cost Incurred to Date	$ 4

Restructuring Changes in liabil

Restructuring Changes in liabilities recorded related to contract termination costs and ARO (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]
Impairment of Long-Lived Assets to be Disposed of		$ 20
Impairment of Intangible Assets (Excluding Goodwill)		$ 5
Asset impairments	$ 0		$ 0	$ 25	$ 0

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Apollo Affiliates and Other Related Parties [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties	$ 0	$ 1	$ 1	$ 2
Accounts Receivable, Related Parties	1		1		$ 1
Apollo [Member]
Related Party Transaction [Line Items]
Annual management consulting fee			$ 3	$ 3
Annual management consulting fee percentage			2.00%	2.00%
Related Party Costs	1	1	$ 2	$ 2
Subsidiary of Common Parent [Member]
Related Party Transaction [Line Items]
Shared Services Costs Incurred by MPM			14	23
Momentive Performance Materials Inc. [Member]
Related Party Transaction [Line Items]
Accounts Receivable shared services costs	1		1		3
Revenue from Related Parties	0	1	1	1
Related Party Transaction, Purchases from Related Party	9	7	16	12
Revenues from distribution agreement	1	1	1	1
Accounts Receivable, Related Parties	0		0		0
Accounts Payable, Related Parties	3		3		2
Other joint ventures unconsolidated [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties	3	4	6	8
Accounts Receivable, Related Parties	7		7		6
Accounts Payable, Related Parties	1		1		1
Purchases from JV	3	$ 3	5	7
Russian Joint Venture [Member]
Related Party Transaction [Line Items]
Loans and Leases Receivable, Related Parties	$ 7		7		$ 6
Hexion Inc. [Member]
Related Party Transaction [Line Items]
Shared Services Costs Incurred by Hexion			19	31
Shared Services Net Billings - Hexion to MPM			$ 9	$ 15

Fair Value (Details)

Fair Value (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	$ 3,795	$ 3,750
Long-term Debt, fair value	3,514	3,255
Debt Issuance Costs, Gross	35	41
Fair Value Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, fair value	0	0
Fair Value Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, fair value	3,449	3,206
Fair Value Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, fair value	$ 65	$ 49

Debt Obligations (Details)

Debt Obligations (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Due Within One Year	$ 82	$ 125
Debt Issuance Costs, Gross	(35)	(41)
Long-term debt	3,678	3,584
ABL Facility [Domain]
Debt Instrument [Line Items]
Due Within One Year	0	0
Long-term debt	120	81
6.625% First Priority Senior Notes Due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Unamortized Premium	2	2
Due Within One Year	0	0
Long-term debt	$ 1,552	$ 1,552
Debt Instrument, Interest Rate, Stated Percentage	6.625%	6.625%
Debt Instrument, Maturity Date	Apr. 15, 2020
10.00% First Priority Senior Notes Due 2020 [Member]
Debt Instrument [Line Items]
Due Within One Year	$ 0	$ 0
Long-term debt	$ 315	$ 315
Debt Instrument, Interest Rate, Stated Percentage	10.00%	10.00%
10.375% First-Priority Senion Secured Notes due 2022 [Member]
Debt Instrument [Line Items]
Due Within One Year	$ 0	$ 0
Long-term debt	$ 560	$ 560
Debt Instrument, Interest Rate, Stated Percentage	10.375%	10.375%
Debt Instrument, Maturity Date	Feb. 1, 2022
13.75% Senior Secured Notes due 2022 [Member]
Debt Instrument [Line Items]
Due Within One Year	$ 0	$ 0
Long-term debt	$ 225	$ 225
Debt Instrument, Interest Rate, Stated Percentage	13.75%	13.75%
9.00% Second-Priority Senior Secured Notes Due 2020 [Member]
Debt Instrument [Line Items]
Due Within One Year	$ 0	$ 0
Long-term debt	$ 574	$ 574
Debt Instrument, Interest Rate, Stated Percentage	9.00%	9.00%
Debt Instrument, Maturity Date	Nov. 15, 2020
9.2% Debentures Due 2021 [Member]
Debt Instrument [Line Items]
Due Within One Year	$ 0	$ 0
Long-term debt	$ 74	$ 74
Debt Instrument, Interest Rate, Stated Percentage	9.20%	9.20%
Debt Instrument, Maturity Date	Mar. 15, 2021
7.875% Debentures Due 2023 [Member]
Debt Instrument [Line Items]
Due Within One Year	$ 0	$ 0
Long-term debt	$ 189	$ 189
Debt Instrument, Interest Rate, Stated Percentage	7.875%	7.875%
Debt Instrument, Maturity Date	Feb. 15, 2023
Australia Facility Due 2021 [Member]
Debt Instrument [Line Items]
Due Within One Year	$ 4	$ 50
Long-term debt	$ 33	0
Debt Instrument, Maturity Date	Dec. 5, 2021
Brazilian Bank Loans [Member]
Debt Instrument [Line Items]
Due Within One Year	$ 37	34
Long-term debt	10	9
Capital Leases [Member]
Debt Instrument [Line Items]
Due Within One Year	8	5
Long-term debt	57	44
Other [Member]
Debt Instrument [Line Items]
Due Within One Year	33	36
Long-term debt	4	2
Unamortized debt issuance costs [Member]
Debt Instrument [Line Items]
Due Within One Year	$ 0	$ 0

Commitments and Contingencies39

Commitments and Contingencies (Details) - Environmental Liabilities - USD ($)	6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Accrued Environmental Loss Contingencies, Current	$ 8,000,000		$ 11,000,000
Liability	48,000,000		52,000,000
Estimated Litigation Liability, Current	2,000,000		2,000,000
Estimated Litigation Liability, Noncurrent		$ 1	1,000,000
Geismar, LA
Accrual for Environmental Loss Contingencies	$ 13,000,000		14,000,000
Discount rate assumed to record at present value	3.00%
Undiscounted Liability Expected to be Paid	next 21 years
Accrual for Environmental Loss Contingencies, Gross	$ 18,000,000
Accrual for Environmental Loss Contingencies, Undiscounted, Due Ratably over the Next Five Years	5,000,000
Less than 1%
Accrual for Environmental Loss Contingencies	2,000,000		2,000,000
Equal to or greater than 1%
Accrual for Environmental Loss Contingencies	6,000,000		6,000,000
Currently-owned
Accrual for Environmental Loss Contingencies	4,000,000		4,000,000
Remediation
Accrual for Environmental Loss Contingencies	23,000,000		26,000,000
Accrued Environmental Loss Contingencies, Current	10,000,000
Estimated Litigation Liability, Noncurrent	14,000,000
Monitoring only
Accrual for Environmental Loss Contingencies	0		$ 0
Maximum [Member]
Site Contingency, Loss Exposure Not Accrued, Best Estimate	89,000,000
Maximum [Member] | Geismar, LA
Liability	22,000,000
Maximum [Member] | Less than 1%
Liability	4,000,000
Maximum [Member] | Equal to or greater than 1%
Liability	14,000,000
Maximum [Member] | Currently-owned
Liability	9,000,000
Maximum [Member] | Remediation
Liability	39,000,000
Maximum [Member] | Monitoring only
Liability	1,000,000
Minimum [Member]
Site Contingency, Loss Exposure Not Accrued, Best Estimate	39,000,000
Minimum [Member] | Geismar, LA
Liability	9,000,000
Minimum [Member] | Less than 1%
Liability	1,000,000
Minimum [Member] | Equal to or greater than 1%
Liability	5,000,000
Minimum [Member] | Currently-owned
Liability	3,000,000
Minimum [Member] | Remediation
Liability	21,000,000
Minimum [Member] | Monitoring only
Liability	$ 0

Commitments and Contingencies40

Commitments and Contingencies (Details) - Non-Environmental Liabilities - USD ($)	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Loss Contingencies [Line Items]
Estimated Litigation Liability	$ 2,000,000		$ 3,000,000
Estimated Litigation Liability, Current	$ 2,000,000		2,000,000
Estimated Litigation Liability, Noncurrent		$ 1	$ 1,000,000

Pension and Postretirement Ex41

Pension and Postretirement Expense (Details) - Schedule of Components of Net Benefit Cost - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Pension Benefits | U.S. Plans
Pension Benefits and Non-Pension Postretirement Benefits Disclosures Table Text Block [Line Items]
Service cost	$ 0	$ 0	$ 1	$ 1
Interest cost on projected benefit obligation	2	2	4	4
Expected return on assets	(3)	(3)	(7)	(7)
Net (benefit) expense	(1)	(1)	(2)	(2)
Pension Benefits | Non-U.S. Plans
Pension Benefits and Non-Pension Postretirement Benefits Disclosures Table Text Block [Line Items]
Service cost	5	4	9	8
Interest cost on projected benefit obligation	2	2	5	4
Expected return on assets	(3)	(3)	(6)	(5)
Net (benefit) expense	4	3	8	7
Non-Pension Postretirement Benefits | U.S. Plans
Pension Benefits and Non-Pension Postretirement Benefits Disclosures Table Text Block [Line Items]
Service cost	0	0	0	0
Interest cost on projected benefit obligation	0	0	0	0
Expected return on assets	0	0	0	0
Net (benefit) expense	0	0	0	0
Non-Pension Postretirement Benefits | Non-U.S. Plans
Pension Benefits and Non-Pension Postretirement Benefits Disclosures Table Text Block [Line Items]
Service cost	0	0	0	0
Interest cost on projected benefit obligation	0	1	0	1
Expected return on assets	0	0	0	0
Net (benefit) expense	$ 0	$ 1	$ 0	$ 1

Disposition (Details)

Disposition (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Discontinued Operations and Disposal Groups [Abstract]
Proceeds from disposition, net			$ 49	$ 0
Gain on disposition	$ 0	$ 0	$ 44	$ 0

Segment Information (Details) -

Segment Information (Details) - Revenues by Segment - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Net sales	$ 995	$ 912	$ 1,941	$ 1,782
Epoxy, Phenolic and Coating Resins
Segment Reporting Information [Line Items]
Net sales	564	517	1,104	1,009
Forest Products Resins
Segment Reporting Information [Line Items]
Net sales	431	395	837	773
North America
Segment Reporting Information [Line Items]
Net sales	531	475	1,032	927
North America | Epoxy, Phenolic and Coating Resins
Segment Reporting Information [Line Items]
Net sales	237	207	470	408
North America | Forest Products Resins
Segment Reporting Information [Line Items]
Net sales	294	268	562	519
Europe
Segment Reporting Information [Line Items]
Net sales	301	271	600	541
Europe | Epoxy, Phenolic and Coating Resins
Segment Reporting Information [Line Items]
Net sales	249	223	494	445
Europe | Forest Products Resins
Segment Reporting Information [Line Items]
Net sales	52	48	106	96
Asia Pacific
Segment Reporting Information [Line Items]
Net sales	112	119	204	217
Asia Pacific | Epoxy, Phenolic and Coating Resins
Segment Reporting Information [Line Items]
Net sales	77	85	138	152
Asia Pacific | Forest Products Resins
Segment Reporting Information [Line Items]
Net sales	35	34	66	65
Latin America
Segment Reporting Information [Line Items]
Net sales	51	47	105	97
Latin America | Epoxy, Phenolic and Coating Resins
Segment Reporting Information [Line Items]
Net sales	1	2	2	4
Latin America | Forest Products Resins
Segment Reporting Information [Line Items]
Net sales	$ 50	$ 45	$ 103	$ 93

Segment Information (Details)44

Segment Information (Details) - EBITDA by Segment - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Segment EBITDA	$ 128	$ 100	$ 246	$ 195
Epoxy, Phenolic and Coating Resins
Segment Reporting Information [Line Items]
Segment EBITDA	72	46	142	98
Forest Products Resins
Segment Reporting Information [Line Items]
Segment EBITDA	76	68	143	129
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Segment EBITDA	$ (20)	$ (14)	$ (39)	$ (32)

Segment Information (Details)45

Segment Information (Details) - Reconciliation of Segment EBITDA to Net Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Net loss attributable to Hexion Inc.	$ (22)	$ (34)	$ (35)	$ (76)
Net income attributable to noncontrolling interest	(1)	0	(1)	0
Net loss	(21)	(34)	(34)	(76)
Income tax expense (benefit)	3	(1)	11	7
Interest expense, net	84	82	167	165
Depreciation and amortization	28	28	58	56
EBITDA	94	75	202	152
Asset impairments	0	0	25	0
Business realignment costs	5	10	14	17
Gain on disposition	0	0	44	0
Realized and unrealized foreign currency losses (gains)	15	(1)	22	(2)
Loss on extinguishment of debt	0	0	0	3
Other	14	16	27	25
Total adjustments	34	25	44	43
Segment EBITDA	128	100	246	195
Epoxy, Phenolic and Coating Resins
Segment Reporting Information [Line Items]
Segment EBITDA	72	46	142	98
Forest Products Resins
Segment Reporting Information [Line Items]
Segment EBITDA	76	68	143	129
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Segment EBITDA	$ (20)	$ (14)	$ (39)	$ (32)

Changes in Accumulated Other 46

Changes in Accumulated Other Comprehensive Income (Details) - Summary of Changes in Accumulated Other Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	$ 6	$ (33)	$ (8)	$ (39)
Beginning Balance Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, After Tax	1	3	1	3
Beginning Balance Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	5	(36)	(9)	(42)
Other comprehensive income before reclassifications, net of tax	(16)	9	(2)	15
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	0	0	0	0
Foreign currency translation adjustments	(16)	9	(2)	15
Ending Balance Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, After Tax	1	3	1	3
Ending Balance Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	(11)	(27)	(11)	(27)
Ending Balance	$ (10)	$ (24)	$ (10)	$ (24)

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Transition tax expense			$ 65
net operating loss carryforward reduction			$ 185
Effective Income Tax Rate Reconciliation, Percent	(16.00%)	3.00%

Guarantor Non-Guarantor Subsi48

Guarantor Non-Guarantor Subsidiary Financial Information Level 4 (Details) - Additional Information	Jun. 30, 2018	Dec. 31, 2017
6.625% First Priority Senior Notes Due 2020 [Member]
Guarantor Obligations [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.625%	6.625%
10.00% First Priority Senior Notes Due 2020 [Member]
Guarantor Obligations [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	10.00%	10.00%
10.375% First-Priority Senion Secured Notes due 2022 [Member]
Guarantor Obligations [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	10.375%	10.375%
13.75% Senior Secured Notes due 2022 [Member]
Guarantor Obligations [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	13.75%	13.75%
9.00% Second-Priority Senior Secured Notes Due 2020 [Member]
Guarantor Obligations [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	9.00%	9.00%

Guarantor Non-Guarantor Subsi49

Guarantor Non-Guarantor Subsidiary Financial Information (Details) - Consolidating Balance Sheets - USD ($) $ in Millions	Jun. 30, 2018	Jan. 01, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents (including restricted cash of $0 and $16, respectively)	$ 130		$ 115	$ 128	$ 196
Accounts receivable, net	473		462
Intercompany accounts receivable	0		0
Intercompany loans receivable - current portion	0		0
Finished and in-process goods	245		221
Raw materials and supplies	103		92
Current assets held for sale	0		6
Other current assets	62	$ 56	44
Total current assets	1,013		940
Investment in unconsolidated entities	22		20
Deferred income taxes	9		8
Long-term assets held for sale	0		2
Other assets, net	42		49
Intercompany loans receivable	0		0
Property and equipment, net	858		924
Goodwill	110		112
Other intangible assets, net	32		42
Total assets	2,086		2,097
Current liabilities
Accounts payable	397		402
Intercompany accounts payable	0		0
Debt payable within one year	82		125
Intercompany loans payable within one year	0		0
Interest payable	82		82
Income taxes payable	10		12
Accrued payroll and incentive compensation	60		47
Current liabilities associated with assets held for sale	0		2
Other current liabilities	119		135
Total current liabilities	750		805
Long-term liabilities
Long-term debt	3,678		3,584
Intercompany loans payable	0		0
Accumulated losses of unconsolidated subsidiaries in excess of investment	0		0
Long-term pension and post employment benefit obligations	246		262
Deferred income taxes	11		11
Other long-term liabilities	178		177
Total liabilities	4,863		4,839
Total Hexion Inc. shareholder’s deficit	(2,777)		(2,741)
Noncontrolling interest	0		(1)
Total deficit	(2,777)		(2,742)
Total liabilities and deficit	2,086		2,097
Hexion Inc. [Member]
Current assets
Cash and cash equivalents (including restricted cash of $0 and $16, respectively)	42		13	11	28
Accounts receivable, net	116		126
Intercompany accounts receivable	58		121
Intercompany loans receivable - current portion	123		1
Finished and in-process goods	97		85
Raw materials and supplies	39		36
Current assets held for sale			1
Other current assets	23		19
Total current assets	498		402
Investment in unconsolidated entities	144		158
Deferred income taxes	0		0
Long-term assets held for sale			0
Other assets, net	13		17
Intercompany loans receivable	1,098		1,114
Property and equipment, net	374		410
Goodwill	52		52
Other intangible assets, net	23		32
Total assets	2,202		2,185
Current liabilities
Accounts payable	130		129
Intercompany accounts payable	56		80
Debt payable within one year	8		10
Intercompany loans payable within one year	0		22
Interest payable	81		80
Income taxes payable	5		6
Accrued payroll and incentive compensation	31		22
Current liabilities associated with assets held for sale			0
Other current liabilities	69		70
Total current liabilities	380		419
Long-term liabilities
Long-term debt	3,520		3,507
Intercompany loans payable	135		190
Accumulated losses of unconsolidated subsidiaries in excess of investment	804		668
Long-term pension and post employment benefit obligations	29		31
Deferred income taxes	1		2
Other long-term liabilities	110		109
Total liabilities	4,979		4,926
Total Hexion Inc. shareholder’s deficit			(2,741)
Noncontrolling interest			0
Total deficit	(2,777)		(2,741)
Total liabilities and deficit	2,202		2,185
Combined Subsidiary Guarantors [Member]
Current assets
Cash and cash equivalents (including restricted cash of $0 and $16, respectively)	0		0	0	0
Accounts receivable, net	1		1
Intercompany accounts receivable	0		0
Intercompany loans receivable - current portion	0		0
Finished and in-process goods	0		0
Raw materials and supplies	0		0
Current assets held for sale			0
Other current assets	0		0
Total current assets	1		1
Investment in unconsolidated entities	14		13
Deferred income taxes	0		0
Long-term assets held for sale			0
Other assets, net	7		8
Intercompany loans receivable	0		0
Property and equipment, net	0		0
Goodwill	0		0
Other intangible assets, net	0		0
Total assets	22		22
Current liabilities
Accounts payable	0		0
Intercompany accounts payable	0		0
Debt payable within one year	0		0
Intercompany loans payable within one year	0		0
Interest payable	0		0
Income taxes payable	0		0
Accrued payroll and incentive compensation	0		0
Current liabilities associated with assets held for sale			0
Other current liabilities	0		0
Total current liabilities	0		0
Long-term liabilities
Long-term debt	0		0
Intercompany loans payable	0		0
Accumulated losses of unconsolidated subsidiaries in excess of investment	157		171
Long-term pension and post employment benefit obligations	0		0
Deferred income taxes	0		0
Other long-term liabilities	0		0
Total liabilities	157		171
Total Hexion Inc. shareholder’s deficit			(149)
Noncontrolling interest			0
Total deficit	(135)		(149)
Total liabilities and deficit	22		22
Combined Non-Guarantor Subsidiaries [Member]
Current assets
Cash and cash equivalents (including restricted cash of $0 and $16, respectively)	88		102	117	168
Accounts receivable, net	356		335
Intercompany accounts receivable	56		80
Intercompany loans receivable - current portion	0		22
Finished and in-process goods	148		136
Raw materials and supplies	64		56
Current assets held for sale			5
Other current assets	39		25
Total current assets	751		761
Investment in unconsolidated entities	21		20
Deferred income taxes	9		8
Long-term assets held for sale			2
Other assets, net	22		24
Intercompany loans receivable	135		190
Property and equipment, net	484		514
Goodwill	58		60
Other intangible assets, net	9		10
Total assets	1,489		1,589
Current liabilities
Accounts payable	267		273
Intercompany accounts payable	58		121
Debt payable within one year	74		115
Intercompany loans payable within one year	123		1
Interest payable	1		2
Income taxes payable	5		6
Accrued payroll and incentive compensation	29		25
Current liabilities associated with assets held for sale			2
Other current liabilities	50		65
Total current liabilities	607		610
Long-term liabilities
Long-term debt	158		77
Intercompany loans payable	1,098		1,114
Accumulated losses of unconsolidated subsidiaries in excess of investment	0		0
Long-term pension and post employment benefit obligations	217		231
Deferred income taxes	10		9
Other long-term liabilities	68		68
Total liabilities	2,158		2,109
Total Hexion Inc. shareholder’s deficit			(519)
Noncontrolling interest			(1)
Total deficit	(669)		(520)
Total liabilities and deficit	1,489		1,589
Consolidation, Eliminations [Member]
Current assets
Cash and cash equivalents (including restricted cash of $0 and $16, respectively)	0		0	$ 0	$ 0
Accounts receivable, net	0		0
Intercompany accounts receivable	(114)		(201)
Intercompany loans receivable - current portion	(123)		(23)
Finished and in-process goods	0		0
Raw materials and supplies	0		0
Current assets held for sale			0
Other current assets	0		0
Total current assets	(237)		(224)
Investment in unconsolidated entities	(157)		(171)
Deferred income taxes	0		0
Long-term assets held for sale			0
Other assets, net	0		0
Intercompany loans receivable	(1,233)		(1,304)
Property and equipment, net	0		0
Goodwill	0		0
Other intangible assets, net	0		0
Total assets	(1,627)		(1,699)
Current liabilities
Accounts payable	0		0
Intercompany accounts payable	(114)		(201)
Debt payable within one year	0		0
Intercompany loans payable within one year	(123)		(23)
Interest payable	0		0
Income taxes payable	0		0
Accrued payroll and incentive compensation	0		0
Current liabilities associated with assets held for sale			0
Other current liabilities	0		0
Total current liabilities	(237)		(224)
Long-term liabilities
Long-term debt	0		0
Intercompany loans payable	(1,233)		(1,304)
Accumulated losses of unconsolidated subsidiaries in excess of investment	(961)		(839)
Long-term pension and post employment benefit obligations	0		0
Deferred income taxes	0		0
Other long-term liabilities	0		0
Total liabilities	(2,431)		(2,367)
Total Hexion Inc. shareholder’s deficit			668
Noncontrolling interest			0
Total deficit	804		668
Total liabilities and deficit	$ (1,627)		$ (1,699)

Guarantor Non-Guarantor Subsi50

Guarantor Non-Guarantor Subsidiary Financial Information (Details) - Consolidating Statement of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net sales	$ 995	$ 912	$ 1,941	$ 1,782
Cost of sales	829	778	1,618	1,515
Gross profit	166	134	323	267
Selling, general and administrative expense	77	77	159	156
Gain on disposition	0	0	(44)	0
Asset impairments	0	0	25	0
Business realignment costs	(5)	(10)	(14)	(17)
Other operating expense, net	11	9	20	3
Operating income	73	38	149	91
Interest expense, net	84	82	167	165
Intercompany interest (income) expense, net	0	0	0	0
Loss on extinguishment of debt	0	0	0	3
Other non-operating expense (income), net	8	(7)	7	(5)
(Loss) income before tax and earnings from unconsolidated entities	(19)	(37)	(25)	(72)
Income tax expense (benefit)	3	(1)	11	7
Loss before earnings from unconsolidated entities	(22)	(36)	(36)	(79)
Earnings from unconsolidated entities, net of taxes	1	2	2	3
Net loss	(21)	(34)	(34)	(76)
Net income attributable to noncontrolling interest	(1)	0	(1)	0
Net (loss) income attributable to Hexion Inc.	(22)	(34)	(35)	(76)
Comprehensive (loss) income attributable to Hexion Inc.	(38)	(25)	(37)	(61)
Hexion Inc. [Member]
Net sales	460	417	891	795
Cost of sales	370	355	727	677
Gross profit	90	62	164	118
Selling, general and administrative expense	44	34	80	67
Gain on disposition			(24)
Asset impairments			25
Business realignment costs	(3)	(6)	(9)	(10)
Other operating expense, net	3	3	3	(3)
Operating income	40	19	71	44
Interest expense, net	80	78	159	158
Intercompany interest (income) expense, net	(21)	(18)	(41)	(35)
Loss on extinguishment of debt				3
Other non-operating expense (income), net	36	(50)	17	(58)
(Loss) income before tax and earnings from unconsolidated entities	(55)	9	(64)	(24)
Income tax expense (benefit)	1	2	(6)	(4)
Loss before earnings from unconsolidated entities	(56)	7	(58)	(20)
Earnings from unconsolidated entities, net of taxes	34	(41)	23	(56)
Net loss	(22)		(35)
Net income attributable to noncontrolling interest	0		0
Net (loss) income attributable to Hexion Inc.	(22)	(34)	(35)	(76)
Comprehensive (loss) income attributable to Hexion Inc.	(38)	(25)	(37)	(61)
Combined Subsidiary Guarantors [Member]
Net sales	0	0	0	0
Cost of sales	0	0	0	0
Gross profit	0	0	0	0
Selling, general and administrative expense	0	0	0	0
Gain on disposition			0
Asset impairments			0
Business realignment costs	0	0	0	0
Other operating expense, net	0	0	0	0
Operating income	0	0	0	0
Interest expense, net	0	0	0	0
Intercompany interest (income) expense, net	0	0	0	0
Loss on extinguishment of debt				0
Other non-operating expense (income), net	0	0	0	0
(Loss) income before tax and earnings from unconsolidated entities	0	0	0	0
Income tax expense (benefit)	0	0	0	0
Loss before earnings from unconsolidated entities	0	0	0	0
Earnings from unconsolidated entities, net of taxes	17	(32)	14	(34)
Net loss	17		14
Net income attributable to noncontrolling interest	0		0
Net (loss) income attributable to Hexion Inc.	17	(32)	14	(34)
Comprehensive (loss) income attributable to Hexion Inc.	16	(31)	14	(34)
Combined Non-Guarantor Subsidiaries [Member]
Net sales	583	550	1,153	1,093
Cost of sales	507	478	994	944
Gross profit	76	72	159	149
Selling, general and administrative expense	33	43	79	89
Gain on disposition			(20)
Asset impairments			0
Business realignment costs	(2)	(4)	(5)	(7)
Other operating expense, net	8	6	17	6
Operating income	33	19	78	47
Interest expense, net	4	4	8	7
Intercompany interest (income) expense, net	21	18	41	35
Loss on extinguishment of debt				0
Other non-operating expense (income), net	(28)	43	(10)	53
(Loss) income before tax and earnings from unconsolidated entities	36	(46)	39	(48)
Income tax expense (benefit)	2	(3)	17	11
Loss before earnings from unconsolidated entities	34	(43)	22	(59)
Earnings from unconsolidated entities, net of taxes	1	1	2	2
Net loss	35		24
Net income attributable to noncontrolling interest	(1)		(1)
Net (loss) income attributable to Hexion Inc.	34	(42)	23	(57)
Comprehensive (loss) income attributable to Hexion Inc.	35	(46)	37	(49)
Consolidation, Eliminations [Member]
Net sales	(48)	(55)	(103)	(106)
Cost of sales	(48)	(55)	(103)	(106)
Gross profit	0	0	0	0
Selling, general and administrative expense	0	0	0	0
Gain on disposition			0
Asset impairments			0
Business realignment costs	0	0	0	0
Other operating expense, net	0	0	0	0
Operating income	0	0	0	0
Interest expense, net	0	0	0	0
Intercompany interest (income) expense, net	0	0	0	0
Loss on extinguishment of debt				0
Other non-operating expense (income), net	0	0	0	0
(Loss) income before tax and earnings from unconsolidated entities	0	0	0	0
Income tax expense (benefit)	0	0	0	0
Loss before earnings from unconsolidated entities	0	0	0	0
Earnings from unconsolidated entities, net of taxes	(51)	74	(37)	91
Net loss	(51)		(37)
Net income attributable to noncontrolling interest	0		0
Net (loss) income attributable to Hexion Inc.	(51)	74	(37)	91
Comprehensive (loss) income attributable to Hexion Inc.	$ (51)	$ 77	$ (51)	$ 83

Guarantor Non-Guarantor Subsi51

Guarantor Non-Guarantor Subsidiary Financial Information (Details) - Consolidating Statement of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows (used in) provided by operating activities	$ (42)	$ (195)
Cash flows provided by (used in) investing activities
Capital expenditures	(43)	(57)
Proceeds from disposition, net	49
Proceeds from sale of assets, net	1	4
Return of capital from subsidiary from sales of accounts receivable	0	0
Net cash (used in) provided by investing activities	7	(53)
Cash flows provided by (used in) financing activities
Net short-term debt borrowings	3	8
Borrowings of long-term debt	294	1,119
Repayments of long-term debt	(243)	(928)
Net intercompany loan borrowings (repayments)	0	0
Long-term debt and credit facility financing fees paid	(1)	(24)
Return of capital to parent from sales of accounts receivable	0	0
Net cash provided by financing activities	53	175
Effect of exchange rates on cash and cash equivalents	(3)	5
Change in cash and cash equivalents	15	(68)
Cash and cash equivalents at beginning of period	115	196
Cash and cash equivalents at end of period	130	128
Hexion Inc. [Member]
Cash flows (used in) provided by operating activities	(185)	(186)
Cash flows provided by (used in) investing activities
Capital expenditures	(13)	(23)
Proceeds from disposition, net	24
Proceeds from sale of assets, net	0	4
Return of capital from subsidiary from sales of accounts receivable	172	68
Net cash (used in) provided by investing activities	183	49
Cash flows provided by (used in) financing activities
Net short-term debt borrowings	(5)	(5)
Borrowings of long-term debt	150	915
Repayments of long-term debt	(140)	(801)
Net intercompany loan borrowings (repayments)	26	31
Long-term debt and credit facility financing fees paid	0	(20)
Return of capital to parent from sales of accounts receivable	0	0
Net cash provided by financing activities	31	120
Effect of exchange rates on cash and cash equivalents	0	0
Change in cash and cash equivalents	29	(17)
Cash and cash equivalents at beginning of period	13	28
Cash and cash equivalents at end of period	42	11
Combined Subsidiary Guarantors [Member]
Cash flows (used in) provided by operating activities	0	0
Cash flows provided by (used in) investing activities
Capital expenditures	0	0
Proceeds from disposition, net	0
Proceeds from sale of assets, net	0	0
Return of capital from subsidiary from sales of accounts receivable	0	0
Net cash (used in) provided by investing activities	0	0
Cash flows provided by (used in) financing activities
Net short-term debt borrowings	0	0
Borrowings of long-term debt	0	0
Repayments of long-term debt	0	0
Net intercompany loan borrowings (repayments)	0	0
Long-term debt and credit facility financing fees paid	0	0
Return of capital to parent from sales of accounts receivable	0	0
Net cash provided by financing activities	0	0
Effect of exchange rates on cash and cash equivalents	0	0
Change in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	0	0
Combined Non-Guarantor Subsidiaries [Member]
Cash flows (used in) provided by operating activities	143	(9)
Cash flows provided by (used in) investing activities
Capital expenditures	(30)	(34)
Proceeds from disposition, net	25
Proceeds from sale of assets, net	1	0
Return of capital from subsidiary from sales of accounts receivable	0	0
Net cash (used in) provided by investing activities	(4)	(34)
Cash flows provided by (used in) financing activities
Net short-term debt borrowings	8	13
Borrowings of long-term debt	144	204
Repayments of long-term debt	(103)	(127)
Net intercompany loan borrowings (repayments)	(26)	(31)
Long-term debt and credit facility financing fees paid	(1)	(4)
Return of capital to parent from sales of accounts receivable	(172)	(68)
Net cash provided by financing activities	(150)	(13)
Effect of exchange rates on cash and cash equivalents	(3)	5
Change in cash and cash equivalents	(14)	(51)
Cash and cash equivalents at beginning of period	102	168
Cash and cash equivalents at end of period	88	117
Consolidation, Eliminations [Member]
Cash flows (used in) provided by operating activities	0	0
Cash flows provided by (used in) investing activities
Capital expenditures	0	0
Proceeds from disposition, net	0
Proceeds from sale of assets, net	0	0
Return of capital from subsidiary from sales of accounts receivable	(172)	(68)
Net cash (used in) provided by investing activities	(172)	(68)
Cash flows provided by (used in) financing activities
Net short-term debt borrowings	0	0
Borrowings of long-term debt	0	0
Repayments of long-term debt	0	0
Net intercompany loan borrowings (repayments)	0	0
Long-term debt and credit facility financing fees paid	0	0
Return of capital to parent from sales of accounts receivable	172	68
Net cash provided by financing activities	172	68
Effect of exchange rates on cash and cash equivalents	0	0
Change in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	$ 0	$ 0