10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2020

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from             to            

Commission File Number:     1-33100

Owens Corning

(Exact name of registrant as specified in its charter)

Delaware			43-2109021
(State or other jurisdiction of incorporation or organization)			(I.R.S. Employer Identification No.)
One Owens Corning Parkway,	Toledo,	OH	43659
(Address of principal executive offices)			(Zip Code)

(419) 248-8000

(Registrant’s telephone number, including area code)

N/A

(Former name, former address and former fiscal year, if changed since last report)

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

Title of each class	Trading Symbol	Name of each exchange on which registered
Common Stock, par value $0.01 per share	OC	New York Stock Exchange

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes þ             No ¨

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

Yes þ             No ¨

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

Large Accelerated Filer	þ	Accelerated filer	¨
Non-accelerated filer	¨	Smaller reporting company	☐
Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).

Yes ☐           No þ

As of April 24, 2020, 107,841,234 shares of registrant’s common stock, par value $0.01 per share, were outstanding.

			Contents
Cover Page			1
PART I – FINANCIAL INFORMATION (unaudited)
	Item 1.	Financial Statements
		Consolidated Statements of Earnings (Loss)	4
		Consolidated Statements of Comprehensive Earnings (Loss)	5
		Consolidated Balance Sheets	6
		Consolidated Statements of Stockholders' Equity	7
		Consolidated Statements of Cash Flows	8
		Notes to Consolidated Financial Statements
		1.    General	9
		2.    Segment Information	11
		3.    Revenue	12
		4.    Inventories	13
		5.    Derivative Financial Instruments	13
		6.    Goodwill and Other Intangible Assets	16
		7.    Property, Plant and Equipment	18
		8.  Warranties	19
		9.  Restructuring and Acquisition-Related Costs	19
		10.  Debt	21
		11.  Pension Plans and Other Postretirement Benefits	24
		12.  Contingent Liabilities and Other Matters	25
		13.  Stock Compensation	26
		14.  Earnings per Share	29
		15.  Income Taxes	30
		16.  Changes in Accumulated Other Comprehensive Deficit	31
	Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	32
	Item 3.	Quantitative and Qualitative Disclosures About Market Risk	45
	Item 4.	Controls and Procedures	45
PART II – OTHER INFORMATION
	Item 1.	Legal Proceedings	46
	Item 1A.	Risk Factors	46
	Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	47
	Item 3.	Defaults Upon Senior Securities	47
	Item 4.	Mine Safety Disclosures	47
	Item 5.	Other Information	47
	Item 6.	Exhibits	48
		Signatures	49

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PART I

ITEM 1. FINANCIAL STATEMENTS

OWENS CORNING AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF EARNINGS (LOSS)

(unaudited)

(in millions, except per share amounts)

	Three Months Ended March 31,
	2020		2019
NET SALES	$	1,601	$	1,667
COST OF SALES	1,295		1,342
Gross margin	306		325
OPERATING EXPENSES
Marketing and administrative expenses	179		182
Science and technology expenses	21		22
Goodwill impairment charge	944		—
Other expenses, net	32		5
Total operating expenses	1,176		209
OPERATING INCOME (LOSS)	(870)		116
Non-operating income	(4)		(2)
EARNINGS (LOSS) BEFORE INTEREST AND TAXES	(866)		118
Interest expense, net	27		36
EARNINGS (LOSS) BEFORE TAXES	(893)		82
Income tax expense	24		39
Equity in net earnings of affiliates	1		1
NET EARNINGS (LOSS)	(916)		44
Net earnings attributable to noncontrolling interests	1		—
NET EARNINGS (LOSS) ATTRIBUTABLE TO OWENS CORNING	$	(917)	$	44
EARNINGS (LOSS) PER COMMON SHARE ATTRIBUTABLE TO OWENS CORNING COMMON STOCKHOLDERS
Basic	$	(8.43)	$	0.40
Diluted	$	(8.43)	$	0.40
WEIGHTED AVERAGE COMMON SHARES
Basic	108.8		109.5
Diluted	108.8		110.1

The accompanying Notes to the Consolidated Financial Statements are an integral part of this Statement.

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OWENS CORNING AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (LOSS)

(unaudited)

(in millions)

	Three Months Ended March 31,
	2020		2019
NET EARNINGS (LOSS)	$	(916)	$	44
Currency translation adjustment (net of tax of $(10) and $(3) for the three months ended March 31, 2020 and 2019, respectively)	(122)		11
Pension and other postretirement adjustment (net of tax of $0 for both the three months ended March 31, 2020 and 2019, respectively)	7		(1)
Hedging adjustment (net of tax of $1 for both the three months ended March 31, 2020 and 2019, respectively)	(1)		(1)
COMPREHENSIVE EARNINGS (LOSS)	(1,032)		53
Comprehensive earnings attributable to noncontrolling interests	1		—
COMPREHENSIVE EARNINGS (LOSS) ATTRIBUTABLE TO OWENS CORNING	$	(1,033)	$	53

The accompanying Notes to the Consolidated Financial Statements are an integral part of this Statement.

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OWENS CORNING AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(unaudited)

(in millions, except per share amounts)

ASSETS	March 31, 2020		December 31, 2019
CURRENT ASSETS
Cash and cash equivalents	$	234	$	172
Receivables, less allowances of $9 at March 31, 2020 and $11 at December 31, 2019	931		770
Inventories	1,062		1,033
Other current assets	105		86
Total current assets	2,332		2,061
Property, plant and equipment, net	3,747		3,855
Operating lease right-of-use assets	190		203
Goodwill	959		1,932
Intangible assets	1,655		1,721
Deferred income taxes	31		46
Other non-current assets	237		188
TOTAL ASSETS	$	9,151	$	10,006
LIABILITIES AND EQUITY
Current liabilities	$	1,430	$	1,329
Long-term debt, net of current portion	3,213		2,986
Pension plan liability	210		231
Other employee benefits liability	174		179
Non-current operating lease liabilities	129		138
Deferred income taxes	274		272
Other liabilities	195		200
OWENS CORNING STOCKHOLDERS’ EQUITY
Preferred stock, par value $0.01 per share (a)	—		—
Common stock, par value $0.01 per share (b)	1		1
Additional paid in capital	4,046		4,051
Accumulated earnings	1,376		2,319
Accumulated other comprehensive deficit	(726)		(610)
Cost of common stock in treasury (c)	(1,210)		(1,130)
Total Owens Corning stockholders’ equity	3,487		4,631
Noncontrolling interests	39		40
Total equity	3,526		4,671
TOTAL LIABILITIES AND EQUITY	$	9,151	$	10,006

(a)10 shares authorized; none issued or outstanding at March 31, 2020 and December 31, 2019

(b)400 shares authorized; 135.5 issued and 107.8 outstanding at March 31, 2020; 135.5 issued and 109.0 outstanding at December 31, 2019

(c)27.7 shares at March 31, 2020 and 26.5 shares at December 31, 2019

The accompanying Notes to the Consolidated Financial Statements are an integral part of this Statement.

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OWENS CORNING AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

(unaudited)

(in millions)

	Common Stock Outstanding			Treasury Stock			APIC (a)		Accumulated Earnings		AOCI (b)		NCI (c)		Total
	Shares	Par Value		Shares	Cost
Balance at December 31, 2019	109.0	$	1	26.5	$	(1,130)	$	4,051	$	2,319	$	(610)	$	40	$	4,671
Net loss attributable to Owens Corning	—	—		—	—		—		(917)		—		—		(917)
Net earnings attributable to noncontrolling interests	—	—		—	—		—		—		—		1		1
Currency translation adjustment	—	—		—	—		—		—		(122)		(2)		(124)
Pension and other postretirement adjustment (net of tax)	—	—		—	—		—		—		7		—		7
Deferred loss on hedging transactions (net of tax)	—	—		—	—		—		—		(1)		—		(1)
Issuance of common stock under share-based payment plans	0.4	—		(0.4)	16		(16)		—		—		—		—
Purchases of treasury stock	(1.6)	—		1.6	(96)		—		—		—		—		(96)
Stock-based compensation expense	—	—		—	—		11		—		—		—		11
Dividends declared (d)	—	—		—	—		—		(26)		—		—		(26)
Balance at March 31, 2020	107.8	$	1	27.7	$	(1,210)	$	4,046	$	1,376	$	(726)	$	39	$	3,526

	Common Stock Outstanding			Treasury Stock			APIC (a)		Accumulated Earnings		AOCI (b)		NCI (c)		Total
	Shares	Par Value		Shares	Cost
Balance at December 31, 2018	109.5	$	1	26.0	$	(1,103)	$	4,028	$	2,013	$	(656)	$	41	$	4,324
Net earnings attributable to Owens Corning	—	—		—	—		—		44		—		—		44
Currency translation adjustment	—	—		—	—		—		—		11		(1)		10
Pension and other postretirement adjustment (net of tax)	—	—		—	—		—		—		(1)		—		(1)
Deferred loss on hedging transactions (net of tax)	—	—		—	—		—		—		(1)		—		(1)
Issuance of common stock under share-based payment plans	0.4	—		(0.4)	14		(14)		—		—		—		—
Purchases of treasury stock	(1.3)	—		1.3	(61)		—		—		—		—		(61)
Stock-based compensation expense	—	—		—	—		11		—		—		—		11
Dividends declared (d)	—	—		—	—		—		(24)		—		—		(24)
Balance at March 31, 2019	108.6	$	1	26.9	$	(1,150)	$	4,025	$	2,033	$	(647)	$	40	$	4,302

(a)Additional Paid in Capital (APIC)

(b)Accumulated Other Comprehensive Earnings (Deficit) (“AOCI”)

(c)Noncontrolling Interest (“NCI”)

(d)Quarterly dividend declarations of $0.24 per share and $0.22 per share as of March 31, 2020 and March 31, 2019, respectively.

The accompanying Notes to the Consolidated Financial Statements are an integral part of this Statement.

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OWENS CORNING AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited)

(in millions)

	Three Months Ended March 31,
	2020		2019
NET CASH FLOW USED FOR OPERATING ACTIVITIES
Net earnings (loss)	$	(916)	$	44
Adjustments to reconcile net earnings (loss) to cash used for operating activities:
Depreciation and amortization	116		113
Deferred income taxes	21		29
Provision for pension and other employee benefits liabilities	(1)		—
Stock-based compensation expense	11		11
Goodwill impairment charge	944		—
Intangible assets impairment charge	43		—
Other non-cash	14		15
Changes in operating assets and liabilities	(265)		(346)
Pension fund contribution	(11)		(8)
Payments for other employee benefits liabilities	(4)		(6)
Other	(4)		(3)
Net cash flow used for operating activities	(52)		(151)
NET CASH FLOW USED FOR INVESTING ACTIVITIES
Cash paid for property, plant, and equipment	(92)		(98)
Proceeds from the sale of assets or affiliates	15		—
Derivative settlements	16		—
Other	—		3
Net cash flow used for investing activities	(61)		(95)
NET CASH FLOW PROVIDED BY FINANCING ACTIVITIES
Proceeds from senior revolving credit and receivables securitization facilities	736		548
Payments on senior revolving credit and receivables securitization facilities	(336)		(182)
Payments on term loan borrowing	(50)		—
Net decrease in short-term debt	(11)		(13)
Dividends paid	(26)		(48)
Purchases of treasury stock	(96)		(61)
Other	(4)		(3)
Net cash flow provided by financing activities	213		241
Effect of exchange rate changes on cash	(38)		10
Net increase in cash, cash equivalents, and restricted cash	62		5
Cash, cash equivalents and restricted cash at beginning of period	179		85
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD	$	241	$	90

The accompanying Notes to the Consolidated Financial Statements are an integral part of this Statement.

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OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

1. GENERAL

Unless the context requires otherwise, the terms “Owens Corning,” “Company,” “we” and “our” in this report refer to Owens Corning, a Delaware corporation, and its subsidiaries.

The Consolidated Financial Statements included in this report are unaudited, pursuant to certain rules and regulations of the Securities and Exchange Commission, and include, in the opinion of the Company, normal recurring adjustments necessary for a fair statement of the results for the periods indicated, which, however, are not necessarily indicative of results which may be expected for the full year. The December 31, 2019 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 ("U.S."). In connection with the Consolidated Financial Statements and Notes included in this report, reference is made to the Consolidated Financial Statements and Notes contained in the Company’s Form 10-K for the year ended December 31, 2019 (the "2019 Form 10-K"). Certain reclassifications have been made to the periods presented for 2019 to conform to the classifications used in the periods presented for 2020.

Cash, Cash Equivalents and Restricted Cash

On the Consolidated Statements of Cash Flows, the total of Cash, cash equivalents and restricted cash includes restricted cash of $7 million, $7 million, $8 million and $7 million as of March 31, 2020, December 31, 2019, March 31, 2019 and December 31, 2018, respectively. Restricted cash primarily represents amounts received from a counterparty related to its performance assurance on an executory contract, which is included in Other current assets on the Consolidated Balance Sheets. These amounts are contractually required to be set aside, and the counterparty can exchange the cash for another form of performance assurance at its discretion.

Accounts Receivable

Trade accounts receivable are recorded at the invoiced amount and do not bear interest. Consistent with the requirements of ASU 2016-13, "Financial Instruments - Credit Losses (Topic 236)," the allowance for doubtful accounts is based on the Company’s assessment of the collectibility of customer accounts. The Company regularly reviews the allowance by considering factors such as historical experience, credit quality, the age of the accounts receivable balances, and current economic conditions that may affect a customer’s ability to pay. Account balances are charged off against the allowance when the Company believes it is probable the receivable will not be recovered.

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OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

(unaudited)

1. GENERAL (continued)

Accounting Pronouncements

The following table summarizes recent ASU's issued by the Financial Accounting Standards Board (FASB) that could have an impact on the Company's Consolidated Financial Statements:

Standard	Description	Effective Date for Company	Effect on the Consolidated Financial Statements
Recently adopted standards:
ASU 2016-13 "Financial Instruments - Credit Losses (Topic 326)," as amended by ASU 2018-19, 2019-04, 2019-05, 2019-10, 2019-11, and 2020-02	This standard replaces the incurred loss methodology for recognizing credit losses with a current expected credit losses model and applies to all financial assets, including trade receivables. Entities will adopt the standard using a modified-retrospective approach.	January 1, 2020	We adopted this standard using the modified-retrospective approach in the first quarter of 2020. The adoption of this standard did not have a material impact on our Consolidated Financial Statements. Please refer to the Accounts Receivable paragraph above in Note 1 of the Consolidated Financial Statements for additional detail on our accounting policy.
ASU 2017-04 "Intangibles - Goodwill and Other (Topic 350)"	This standard simplifies the test for goodwill impairment by eliminating Step 2 of the impairment test. If the carrying amount of a reporting unit exceeds its fair value, an impairment loss shall be recognized in an amount equal to that excess, limited to the total amount of goodwill allocated to that reporting unit. Entities will adopt the standard using a prospective approach.	January 1, 2020	We adopted this standard using the prospective approach for our interim impairment test conducted in the first quarter of 2020. The goodwill impairment charge of $944 million recorded for the three months ended March 31, 2020, was calculated in accordance with this standard. Please refer to Note 6 of the Consolidated Financial Statements for additional detail on this adoption.
Recently issued standard:
ASU 2019-12 "Income Taxes (Topic 740)"	This standard simplifies accounting for income taxes including such topics as intraperiod tax allocations, franchise taxes and separate company financial statements.	January 1, 2021	We are currently assessing the impact this standard will have on our Consolidated Financial Statements.

Table of Contents

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OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

(unaudited)

2. SEGMENT INFORMATION

The Company has three reportable segments: Composites, Insulation and Roofing. Accounting policies for the segments are the same as those for the Company. The Company’s three reportable segments are defined as follows:

Composites – The Company manufactures, fabricates and sells glass reinforcements in the form of fiber. Glass reinforcement materials are also used downstream by the Composites segment to manufacture and sell glass fiber products in the form of fabrics, non-wovens and other specialized products.

Insulation – Within our Insulation segment, the Company manufactures and sells fiberglass insulation into residential, commercial, industrial and other markets for both thermal and acoustical applications. It also manufactures and sells glass fiber pipe insulation, flexible duct media, bonded and granulated mineral wool insulation, cellular glass insulation and foam insulation used in above- and below-grade construction applications.

Roofing – Within our Roofing segment, the Company manufactures and sells residential roofing shingles, oxidized asphalt materials, roofing components used in residential and commercial construction and specialty applications, and synthetic packaging materials.

NET SALES

The following table summarizes our Net sales by segment and geographic region (in millions). Corporate eliminations (shown below) largely reflect intercompany sales from Composites to Roofing. External customer sales are attributed to geographic region based upon the location from which the product is sold to the external customer.

	Three Months Ended March 31,
	2020		2019
Reportable Segments
Composites	$	494	$	513
Insulation	603		591
Roofing	555		614
Total reportable segments	1,652		1,718
Corporate eliminations	(51)		(51)
NET SALES	$	1,601	$	1,667

External Customer Sales by Geographic Region
United States	$	1,060	$	1,100
Europe	287		296
Asia-Pacific	128		149
Rest of world	126		122
NET SALES	$	1,601	$	1,667

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OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

(unaudited)

2. SEGMENT INFORMATION (continued)

EARNINGS BEFORE INTEREST AND TAXES

Earnings before interest and taxes (EBIT) by segment consist of net sales less related costs and expenses and are presented on a basis that is used internally for evaluating segment performance. Certain items, such as general corporate expenses or income and certain other expense or income items, are excluded from the internal evaluation of segment performance. Accordingly, these items are not reflected in EBIT for our reportable segments and are included within Corporate, Other and Eliminations.

The following table summarizes EBIT by segment (in millions):

	Three Months Ended March 31,
	2020		2019
Reportable Segments
Composites	$	44	$	57
Insulation	39		15
Roofing	64		74
Total reportable segments	147		146
Restructuring (costs) / gains	(5)		2
Gains on sales of certain precious metals	10		—
Goodwill impairment charge	(944)		—
Intangible asset impairment charges	(43)		—
General corporate expense and other	(31)		(30)
Total corporate, other and eliminations	(1,013)		(28)
EBIT	$	(866)	$	118

TOTAL ASSETS

Total assets for the Insulation segment decreased following $987 million of non-cash impairment charges for goodwill and intangible assets in the three months ended March 31, 2020. Please refer to Note 6, Goodwill and Other Intangible Assets, for information on these charges.

3. REVENUE

The following table shows a disaggregation of Net sales (in millions):

	For the three months ended March 31, 2020
Reportable Segments	Composites		Insulation		Roofing		Eliminations		Consolidated
Disaggregation Categories
U.S. residential	$	66	$	211	$	492	$	(50)	$	719
U.S. commercial and industrial	151		162		28		—		341
Europe	141		143		4		(1)		287
Asia-Pacific	105		20		3		—		128
Rest of world	31		67		28		—		126
NET SALES	$	494	$	603	$	555	$	(51)	$	1,601

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OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

(unaudited)

3. REVENUE (continued)

	For the three months ended March 31, 2019
Reportable Segments	Composites		Insulation		Roofing		Eliminations		Consolidated
Disaggregation Categories
U.S. residential	$	67	$	196	$	551	$	(48)	$	766
U.S. commercial and industrial	154		155		25		—		334
Europe	150		143		4		(1)		296
Asia-Pacific	112		34		3		—		149
Rest of world	30		63		31		(2)		122
NET SALES	$	513	$	591	$	614	$	(51)	$	1,667

As of December 31, 2019, our contract liability balances (for extended warranties, down payments and deposits, collectively) totaled $60 million, of which $12 million was recognized as revenue in the first three months of 2020. As of March 31, 2020, our contract liability balances totaled $63 million.

4. INVENTORIES

Inventories consist of the following (in millions):

	March 31, 2020		December 31, 2019
Finished goods	$	725	$	715
Materials and supplies	337		318
Total inventories	$	1,062	$	1,033

5. DERIVATIVE FINANCIAL INSTRUMENTS

The Company is exposed to, among other risks, the impact of changes in commodity prices, foreign currency exchange rates, and interest rates in the normal course of business. The Company’s risk management program is designed to manage the exposure and volatility arising from these risks, and utilizes derivative financial instruments to offset a portion of these risks. The Company uses derivative financial instruments only to the extent necessary to hedge identified business risks, and does not enter into such transactions for trading purposes.

The Company generally does not require collateral or other security with counterparties to these financial instruments and is therefore subject to credit risk in the event of nonperformance; however, the Company monitors credit risk and currently does not anticipate nonperformance by other parties. Contracts with counterparties generally contain right of offset provisions. These provisions effectively reduce the Company’s exposure to credit risk in situations where the Company has gain and loss positions outstanding with a single counterparty. It is the Company’s policy to offset on the Consolidated Balance Sheets the amounts recognized for derivative instruments with any cash collateral arising from derivative instruments executed with the same counterparty under a master netting agreement. As of March 31, 2020 and December 31, 2019, the Company did not have any amounts on deposit with any of its counterparties, nor did any of its counterparties have any amounts on deposit with the Company.

Derivative Fair Values

Our derivatives consist of natural gas forward swaps, cross-currency swaps, foreign exchange forward contracts and U.S. treasury rate lock agreements, all of which are over-the-counter and not traded through an exchange. The Company uses widely accepted valuation tools to determine fair value, such as discounting cash flows to calculate a present value for the derivatives. The models use Level 2 inputs, such as forward curves and other commonly quoted observable transactions and prices. The fair value of our derivatives and hedging instruments are all classified as Level 2 investments within the three-tier hierarchy.

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OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

(unaudited)

5. DERIVATIVE FINANCIAL INSTRUMENTS (continued)

The following table presents the fair value of derivatives and hedging instruments and the respective location on the Consolidated Balance Sheets (in millions):

		Fair Value at
	Location	March 31, 2020		December 31, 2019
Derivative assets designated as hedging instruments:
Net investment hedges:
Cross-currency swaps	Other current assets	$	13	$	12
Cross-currency swaps	Other non-current assets	$	38	$	1
Derivative liabilities designated as hedging instruments:
Net investment hedges:
Cross-currency swaps	Other liabilities	$	—	$	4
Cash flow hedges:
Natural gas forward swaps	Current liabilities	$	3	$	3
Treasury interest rate lock	Other liabilities	$	1	$	—
Derivative assets not designated as hedging instruments:
Foreign exchange forward contracts	Other current assets	$	12	$	9
Derivative liabilities not designated as hedging instruments:
Foreign exchange forward contracts	Current liabilities	$	6	$	1

Consolidated Statements of Earnings (Loss) Activity

The following table presents the impact and respective location of derivative activities on the Consolidated Statements of Earnings (Loss) (in millions):

		Three Months Ended March 31,
	Location	2020		2019
Derivative activity designated as hedging instruments:
Natural gas cash flow hedges:
Amount of loss reclassified from AOCI (as defined below) into earnings	Cost of sales	$	2	$	—
Cross-currency swap net investment hedges:
Amount of gain recognized in earnings on derivative amounts excluded from effectiveness testing	Interest expense, net	$	(3)	$	(3)
Derivative activity not designated as hedging instruments:
Foreign currency:
Amount of gain recognized in earnings (a)	Other expenses, net	$	(12)	$	(19)

(a)Gains related to foreign currency derivatives were substantially offset by net revaluation impacts on foreign currency denominated balance sheet exposures, which were also recorded in Other expenses, net. Please refer to the "Other Derivatives" section below for additional detail.

- 15 -

OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

(unaudited)

5. DERIVATIVE FINANCIAL INSTRUMENTS (continued)

Consolidated Statements of Comprehensive Earnings (Loss) Activity

The following table presents the impact of derivative activities on the Consolidated Statements of Comprehensive Earnings (Loss) (in millions):

		Amount of (Gain) Loss Recognized in Comprehensive Earnings (Loss)
		Three Months Ended March 31,
Hedging Type	Derivative Financial Instrument	2020		2019
Net investment hedge	Cross-currency swaps	$	(42)	$	(13)
Cash flow hedge	Natural gas forward swaps	$	—	$	2
Cash flow hedge	Treasury interest rate lock	$	1	$	—

Cash Flow Hedges

The Company uses a combination of derivative financial instruments, which qualify as cash flow hedges, and physical contracts to manage forecasted exposure to electricity and natural gas prices. As of March 31, 2020, the notional amounts of these natural gas forward swaps was 7 MMBtu (or MMBtu equivalent) based on U.S. and European indices.

In March 2020, the Company entered into a $175 million forward U.S. Treasury rate lock agreement to manage the U.S. Treasury portion of its interest rate risk associated with the anticipated issuance of 10-year fixed rate senior notes before the end of 2022. The Company intends to cash settle these agreements upon issuance of the senior notes thereby effectively locking in the U.S. Treasury fixed interest rate in effect at the time the agreement was initiated. The locked fixed rate of this agreement is 0.994%. The Company has designated this outstanding forward U.S. Treasury rate lock agreement, which expires on December 15, 2022, as a cash flow hedge.

Net Investment Hedges

The Company has translation exposure resulting from translating the financial statements of foreign subsidiaries into U.S. Dollars, which is recognized in Currency translation adjustment (a component of AOCI). The Company uses cross-currency forward contracts to hedge a portion of the net investment in foreign subsidiaries against fluctuations in foreign exchange rates. As of March 31, 2020, the notional amount of these derivative financial instruments was $516 million related to the U.S. Dollar and European Euro.

Other Derivatives

The Company uses forward currency exchange contracts to manage existing exposures to foreign exchange risk related to assets and liabilities recorded on the Consolidated Balance Sheets. As of March 31, 2020, the Company had notional amounts of $711 million for non-designated derivative financial instruments related to foreign currency exposures in U.S. Dollars primarily related to Brazilian Real, Chinese Yuan, European Euro, Hong Kong Dollar, Indian Rupee, and South Korean Won. In addition, the Company had notional amounts of $69 million for non-designated derivative financial instruments related to foreign currency exposures in European Euro primarily related to the Russian Ruble and Czech Koruna.

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OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

(unaudited)

6.  GOODWILL AND OTHER INTANGIBLE ASSETS

Goodwill

The Company tests goodwill and indefinite-lived intangible assets for impairment during the fourth quarter of each year, or more frequently should circumstances change or events occur that would more likely than not reduce the fair value of a reporting unit below its carrying value. During the first quarter of 2020, the Company’s significant share price reduction during the ongoing COVID-19 pandemic was determined to be an indicator of impairment under ASC 350. The COVID-19 pandemic will likely have a negative impact on results for the remainder of 2020 and creates near-term uncertainty in our markets.

As of the most recent annual goodwill impairment testing date (October 1, 2019), testing indicated that the business enterprise value for the Insulation reporting unit exceeded its carrying value by approximately 10%. As described in our 2019 Form 10-K, there was uncertainty surrounding the macroeconomic factors impacting this reporting unit and a downturn in these factors or a change in the long-term revenue growth or profitability for this reporting unit could increase the likelihood of a future impairment.

In the first quarter of 2020, the Company performed its ongoing assessment to consider whether events or circumstances had occurred that could more likely than not reduce the fair value of a reporting unit below its carrying value. The valuation limitation from the Company’s recent share price decline, the narrow cushion on the Insulation reporting unit and the high level of near-term macroeconomic uncertainty caused the Company to perform an interim goodwill impairment test as of March 31, 2020 over the Insulation reporting unit. After evaluating and weighing all relevant events and circumstances, and considering the substantial excess fair values for the Roofing and Composites reporting units, we concluded that it is not more likely than not that the fair values of these reporting units were less than their carrying values. Consequently, we determined that it was not necessary to perform an interim impairment test for the Roofing and Composites reporting units.

Based on the results of this testing, the Company recorded a $944 million pre-tax non-cash impairment charge related to the Insulation reporting unit in the first quarter of 2020. This charge was recorded in Goodwill impairment charge on the Consolidated Statements of Earnings (Loss), and was included in the Corporate, Other and Eliminations reporting category. Consistent with the Company’s adoption of ASU 2017-04 in the first quarter of 2020, the impairment charge was equal to the excess of the Insulation reporting unit’s carrying value over its fair value. The overall enterprise fair value of the Company was limited by the recent decline in our share price. The reduction in fair value for the Insulation reporting unit, and corresponding impairment charge, was primarily driven by an increase in the discount rate arising from higher equity risk premiums that reflect significant uncertainty surrounding the effect from the COVID-19 pandemic and a decrease in the reporting unit's forecasted near-term cash flows.

As part of our quantitative testing process for goodwill of the Insulation reporting unit, we estimated fair values using a discounted cash flow analysis, a form of the income approach, from the perspective of a market participant. Significant assumptions used in the discounted cash flow approach are revenue growth rates and EBIT margins used in estimating discrete period cash flow forecasts of the reporting unit, the discount rate, and the long-term revenue growth rate and EBIT margins used in estimating the terminal business value. The terminal business value is determined by applying the long-term growth rate to the latest year for which a forecast exists.

The changes in the net carrying value of goodwill by segment are as follows (in millions):

	Composites		Insulation		Roofing		Total
Balance at December 31, 2019	$	57	$	1,479	$	396	$	1,932
Impairment charge	—		(944)		—		(944)
Divestiture	—		(4)		—		(4)
Foreign currency translation	(1)		(23)		(1)		(25)
Balance at March 31, 2020	$	56	$	508	$	395	$	959

- 17 -

OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

(unaudited)

6.  GOODWILL AND OTHER INTANGIBLE ASSETS (continued)

The remaining balance of goodwill for the Insulation reporting unit continues to be at risk for future impairment. There continues to be uncertainty surrounding the macroeconomic factors impacting this reporting unit, and a sustained downturn, significantly extended recovery, or a change in the long-term revenue growth or profitability for this reporting unit could increase the likelihood of an additional future impairment. Additionally, changes in market participant assumptions such as an increased discount rate or further share price reductions could increase the likelihood of an additional future impairment.

Other Intangible Assets

The Company amortizes the cost of other intangible assets over their estimated useful lives which, individually, range up to 45 years. The Company's future cash flows are not materially impacted by its ability to extend or renew agreements related to its amortizable intangible assets.

We performed an interim impairment test of certain indefinite-lived trademarks and trade names used by our Insulation segment, based on the macroeconomic conditions that precipitated the interim goodwill impairment test described above.

Based on the results of this testing, the Company recorded pre-tax non-cash impairment charges totaling $43 million in the first quarter of 2020 related to two of the Insulation trademarks and trade names. These charges were recorded in Other expenses, net on the Consolidated Statements of Earnings (Loss), and were included in the Corporate, Other and Eliminations reporting category.

Fair values used in testing for potential impairment of our trademarks are calculated using the relief-from-royalty method by applying an estimated market value royalty rate to the forecasted revenues of the businesses that utilize those assets. The assumed cash flows from this calculation are discounted at a rate based on a market participant discount rate.

A pre-tax impairment charge of $34 million for a trade name used by our European building and technical insulation business was recognized due to the combined effect of lower expected sales following an immaterial divestiture in the first quarter of 2020, a decrease in the forecasted near-term cash flows, and a higher discount rate associated with the economic impact and uncertainty from the COVID-19 pandemic. A pre-tax impairment charge of $9 million related to a trademark used on global cellular glass insulation products was recorded due to a slightly lower sales outlook and a similarly higher discount rate associated with the economic impact and uncertainty from the COVID-19 pandemic.

There is uncertainty surrounding the revenue growth factors for these assets and a change in the long-term revenue growth rate or increase in the discount rate assumption could increase the likelihood of a future impairment. Following the recognition of the impairment losses, the two affected assets had an aggregate carrying value of $248 million as of March 31, 2020.

The Other category below primarily includes franchise agreements and quarry and emissions rights. Other intangible assets consist of the following (in millions):

	March 31, 2020						December 31, 2019
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Trademarks	$	1,093	n/a		$	1,093	$	1,139	n/a		$	1,139
Customer relationships	539		$	(173)	366		550		$	(167)	383
Technology	318		(157)		161		319		(152)		167
Other	69		(34)		35		67		(35)		32
Total other intangible assets	$	2,019	$	(364)	$	1,655	$	2,075	$	(354)	$	1,721

- 18 -

OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

(unaudited)

6.  GOODWILL AND OTHER INTANGIBLE ASSETS (continued)

The estimated amortization expense for intangible assets for the next five years is as follows (in millions):

Period	Amortization
2021	$	48
2022	$	46
2023	$	44
2024	$	40
2025	$	38

7. PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment consist of the following (in millions):

	March 31, 2020		December 31, 2019
Land	$	215	$	221
Buildings and leasehold improvements	1,174		1,186
Machinery and equipment	4,984		4,978
Construction in progress	218		310
	6,591		6,695
Accumulated depreciation	(2,844)		(2,840)
Property, plant and equipment, net	$	3,747	$	3,855

Machinery and equipment includes certain precious metals used in our production tooling, which comprise approximately 10% of total machinery and equipment as of both March 31, 2020 and December 31, 2019. Precious metals used in our production tooling are depleted as they are consumed during the production process, which typically represents an annual expense of about 3% of the outstanding carrying value.

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OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

(unaudited)

8. WARRANTIES

The Company records a liability for warranty obligations at the date the related products are sold. Adjustments are made as new information becomes available. Please refer to Note 1 of our 2019 Form 10-K for information about our separately-priced extended warranty contracts. A reconciliation of the warranty liability is as follows (in millions):

	Three Months Ended March 31,
	2020		2019
Beginning balance	$	64	$	60
Amounts accrued for current year	4		4
Settlements of warranty claims	(3)		(3)
Ending balance	$	65	$	61

9. RESTRUCTURING AND ACQUISITION-RELATED COSTS

The Company may incur restructuring, transaction and integration costs related to acquisitions, and may incur restructuring costs in connection with its global cost reduction and productivity initiatives.

Restructuring Costs

Insulation Network Optimization Restructuring

In October 2019, the Company took actions to primarily restructure certain U.S. insulation operations and to reduce the cost structure throughout the Insulation network. Investments in productivity and process technologies enabled the Company to optimize its network and improve its cost position. During the first three months of 2020, the Company recorded $5 million of charges. The Company expects to recognize approximately $2 million of incremental charges throughout 2020.

Acquisition-Related Restructuring

Following the acquisitions of Paroc Group Oy ("Paroc") and Pittsburgh Corning Corporation and Pittsburgh Corning Europe NV (collectively, "Pittsburgh Corning") into the Company's Insulation segment, the Company took actions to realize expected synergies from the newly acquired operations. The Company does not expect to recognize significant incremental costs related to these actions.

Consolidated Statements of Earnings (Loss) Classification

The following table presents the impact and respective location of total restructuring costs on the Consolidated Statements of Earnings (Loss), which are included within Corporate, Other and Eliminations (in millions):

		Three Months Ended March 31,
Type of cost	Location	2020		2019
Accelerated depreciation	Cost of sales	$	1	$	—
Other exit costs	Cost of sales	2		1
Severance	Other expenses, net	2		—
Other exit costs (gains)	Other expenses, net	—		(3)
Total restructuring costs (gains)		$	5	$	(2)

- 20 -

OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

(unaudited)

9. RESTRUCTURING AND ACQUISITION-RELATED COSTS (continued)

Summary of Unpaid Liabilities

The following table summarizes the status of the unpaid liabilities from the Company's restructuring activities (in millions):

	Insulation Network Optimization Restructuring		Acquisition-Related Restructuring
Balance at December 31, 2019	$	5	$	11
Restructuring costs	5		—
Payments	(5)		(2)
Non-cash items and reclassifications to other accounts	(2)		1
Balance at March 31, 2020	$	3	$	10
Cumulative charges incurred	$	29	$	29

As of March 31, 2020, the remaining liability balance is comprised of $13 million of severance, inclusive of $1 million of non-current severance and $12 million of severance the Company expects to pay over the next twelve months.

- 21 -

OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

(unaudited)

10. DEBT

Details of the Company’s outstanding long-term debt, as well as the fair values, are as follows (in millions):

	March 31, 2020				December 31, 2019
	Carrying Value		Fair Value		Carrying Value		Fair Value
4.20% senior notes, net of discount and financing fees, due 2022	$	184	104	%	$	183	104	%
4.20% senior notes, net of discount and financing fees, due 2024	395		105	%	395		106	%
3.40% senior notes, net of discount and financing fees, due 2026	397		96	%	396		101	%
3.95% senior notes, net of discount and financing fees, due 2029	445		96	%	445		104	%
7.00% senior notes, net of discount and financing fees, due 2036	367		127	%	367		126	%
4.30% senior notes, net of discount and financing fees, due 2047	588		82	%	588		95	%
4.40% senior notes, net of discount and financing fees, due 2048	390		93	%	390		97	%
Senior revolving credit facility, maturing in 2024 (a)	400		n/a		—		n/a
Various finance leases, due through 2032 (a)	56		100	%	26		100	%
Term loan borrowing, maturing in 2021 (a)	150		100	%	200		100	%
Other	2		n/a		3		n/a
Total long-term debt	3,374		n/a		2,993		n/a
Less – current portion (a)	161		100	%	7		100	%
Long-term debt, net of current portion	$	3,213	n/a		$	2,986	n/a

(a) The Company determined that the book value of the above noted long-term debt instruments approximates fair value.

The fair values of the Company's outstanding long-term debt instruments were estimated using market observable inputs, including quoted prices in active markets, market indices and interest rate measurements. Within the hierarchy of fair value measurements, these are Level 2 fair values.

Senior Notes

The Company issued $450 million of 2029 senior notes on August 12, 2019. Interest on the notes is payable semiannually in arrears on February 15 and August 15 each year, beginning on February 15, 2020. The proceeds from these notes were used to repay $416 million of our 2022 senior notes and $34 million of our 2036 senior notes.

The Company issued $400 million of 2048 senior notes on January 25, 2018. Interest on the notes is payable semiannually in arrears on January 30 and July 30 each year, beginning on July 30, 2018. The proceeds from these notes were used, along with borrowings on a $600 million term loan commitment and borrowings on the Receivables Securitization Facility (as defined below), to fund the purchase of Paroc in the first quarter of 2018.

The Company issued $600 million of 2047 senior notes on June 26, 2017. Interest on the notes is payable semiannually in arrears on January 15 and July 15 each year, beginning on January 15, 2018. A portion of the proceeds from these notes was used to fund the purchase of Pittsburgh Corning in 2017 and for general corporate purposes. The remaining proceeds were used to repay $144 million of our 2019 senior notes and $140 million of our 2036 senior notes.

The Company issued $400 million of 2026 senior notes on August 8, 2016. Interest on the notes is payable semiannually in arrears on February 15 and August 15 each year, beginning on February 15, 2017. A portion of the proceeds from these notes was used to repay $158 million of our 2016 senior notes. The remaining proceeds were used to pay down portions of our Receivables Securitization Facility and for general corporate purposes.

- 22 -

OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

(unaudited)

10. DEBT (continued)

The Company issued $400 million of 2024 senior notes on November 12, 2014. Interest on the notes is payable semiannually in arrears on June 1 and December 1 each year, beginning on June 1, 2015. A portion of the proceeds from these notes was used to repay $242 million of our 2016 senior notes and $105 million of our 2019 senior notes. The remaining proceeds were used to pay down our Senior Revolving Credit Facility (as defined below), finance general working capital needs, and for general corporate purposes.

The Company issued $600 million of 2022 senior notes on October 17, 2012. Interest on the notes is payable semiannually in arrears on June 15 and December 15 each year, beginning on June 15, 2013. The proceeds of these notes were used to repay $250 million of our 2016 senior notes and $100 million of our 2019 senior notes and pay down our Senior Revolving Credit Facility.

On October 31, 2006, the Company issued $550 million of 2036 senior notes. The proceeds of these notes were used to pay certain unsecured and administrative claims, finance general working capital needs and for general corporate purposes.

Collectively, the senior notes above are referred to as the “Senior Notes.” The Senior Notes are general unsecured obligations of the Company and rank pari passu with all existing and future senior unsecured indebtedness of the Company.

The Company has the option to redeem all or part of the Senior Notes at any time at a “make-whole” redemption price. The Company is subject to certain covenants in connection with the issuance of the Senior Notes that it believes are usual and customary. The Company was in compliance with these covenants as of March 31, 2020.

Senior Revolving Credit Facility

The Company has an $800 million Senior Revolving Credit Facility with a maturity date in May 2024 that includes both borrowings and letters of credit. Borrowings under the Senior Revolving Credit Facility may be used for general corporate purposes and working capital. The Company has the discretion to borrow under multiple options, which provide for varying terms and interest rates including the United States prime rate, federal funds rate plus a spread or LIBOR plus a spread.

The Senior Revolving Credit Facility contains various covenants, including a maximum allowed leverage ratio and a minimum required interest expense coverage ratio, that the Company believes are usual and customary for a senior unsecured credit agreement. The Company was in compliance with these covenants as of March 31, 2020. Please refer to the Credit Facility Utilization paragraph below for liquidity information as of March 31, 2020.

Term Loan Borrowing

The Company obtained a term loan borrowing on October 27, 2017 for $600 million (the "Term Loan"). The Company entered into the Term Loan, in part, to pay a portion of the purchase price of the Paroc acquisition. In the first quarter of 2018, the Company borrowed on the Term Loan, along with borrowings on the Receivables Securitization Facility and the proceeds of the 2048 senior notes, to fund the purchase of Paroc. The Term Loan requires partial quarterly principal repayments, all of which have been paid as of March 31, 2020, and full repayment by February 2021. As of March 31, 2020, the Term Loan had $150 million outstanding.

The Term Loan contains various covenants, including a maximum allowed leverage ratio and a minimum required interest expense coverage ratio, that the Company believes are usual and customary for a term loan. The Company was in compliance with these covenants as of March 31, 2020.

Receivables Securitization Facility

Included in long-term debt on the Consolidated Balance Sheets are borrowings outstanding under a Receivables Purchase Agreement (RPA) that are accounted for as secured borrowings in accordance with ASC 860, "Accounting for Transfers and Servicing." Owens Corning Sales, LLC and Owens Corning Receivables LLC, each a subsidiary of the Company, have a $280 million RPA with certain financial institutions. The Company has the ability to borrow at the lenders' cost of funds, which approximates A-1/P-1 commercial paper rates vs. LIBOR, plus a fixed spread. The securitization facility (the "Receivables Securitization Facility") has been amended from time to time, with a maturity date in April 2022.

- 23 -

OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

(unaudited)

10. DEBT (continued)

The Receivables Securitization Facility contains various covenants, including a maximum allowed leverage ratio and a minimum required interest expense coverage ratio that the Company believes are usual and customary for a securitization facility. The Company was in compliance with these covenants as of March 31, 2020. Please refer to the Credit Facility Utilization section below for liquidity information as of March 31, 2020.

Owens Corning Receivables LLC’s sole business consists of the purchase or acceptance through capital contributions of trade receivables and related rights from Owens Corning Sales, LLC and the subsequent retransfer of or granting of a security interest in such trade receivables and related rights to certain purchasers who are party to the RPA. Owens Corning Receivables LLC is a separate legal entity with its own separate creditors who will be entitled, upon its liquidation, to be satisfied out of Owens Corning Receivables LLC’s assets prior to any assets or value in Owens Corning Receivables LLC becoming available to Owens Corning Receivables LLC’s equity holders. The assets of Owens Corning Receivables LLC are not available to pay creditors of the Company or any other affiliates of the Company or Owens Corning Sales, LLC.

Credit Facility Utilization

The following table shows how the Company utilized its primary sources of liquidity (in millions):

	Balance at March 31, 2020
	Senior Revolving Credit Facility		Receivables Securitization Facility
Facility size or borrowing limit	$	800	$	280
Collateral capacity limitation on availability	n/a		—
Outstanding borrowings	400		—
Outstanding letters of credit	4		2
Availability on facility	$	396	$	278

Short-Term Debt

Short-term borrowings were $9 million and $20 million as of March 31, 2020 and December 31, 2019, respectively. The short-term borrowings for both periods consisted of various operating lines of credit and working capital facilities. Certain of these borrowings are collateralized by receivables, inventories or property. The borrowing facilities are typically for one-year renewable terms. The weighted average interest rate on all short-term borrowings was approximately 8.2% and 7.8% for March 31, 2020 and December 31, 2019, respectively.

- 24 -

OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

(unaudited)

11. PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS

Pension Plans

The Company sponsors defined benefit pension plans. Under the plans, pension benefits are based on an employee’s years of service and, for certain categories of employees, qualifying compensation. Company contributions to these pension plans are determined by an independent actuary to meet or exceed minimum funding requirements. In our non-U.S. plans, the unrecognized cost of any retroactive amendments and actuarial gains and losses are amortized over the average future service period of plan participants expected to receive benefits. In our U.S. plans, the unrecognized cost of any retroactive amendments and actuarial gains and losses are amortized over the average remaining life expectancy of the inactive participants as substantially all of the plan participants are inactive.

The following tables provide information regarding pension expense recognized (in millions):

	Three Months Ended March 31,
	2020						2019
	U.S.		Non-U.S.		Total		U.S.		Non-U.S.		Total
Components of Net Periodic Pension Cost
Service cost	$	1	$	1	$	2	$	1	$	1	$	2
Interest cost	7		2		9		9		3		12
Expected return on plan assets	(11)		(4)		(15)		(13)		(4)		(17)
Amortization of actuarial loss	3		1		4		3		1		4
Net periodic pension cost	$	—	$	—	$	—	$	—	$	1	$	1

The Company expects to contribute between $10 million and $25 million in cash to the U.S. pension plans and another $15 million to $25 million to non-U.S. plans during 2020. The Company made cash contributions of $11 million to the plans during the three months ended March 31, 2020.

Postemployment and Postretirement Benefits Other than Pension Plans ("OPEB")

The Company maintains healthcare and life insurance benefit plans for certain retired employees and their dependents. The health care plans in the United States are non-funded and pay either (1) stated percentages of covered medically necessary expenses, after subtracting payments by Medicare or other providers and after stated deductibles have been met, or (2) fixed amounts of medical expense reimbursement.

The following table provides the components of net periodic benefit cost for aggregated U.S. and non-U.S. plans for the periods indicated (in millions):

	Three Months Ended March 31,
	2020		2019
Components of Net Periodic Benefit Cost
Service cost	$	—	$	—
Interest cost	2		2
Amortization of prior service credit	(1)		(1)
Amortization of actuarial gain	(2)		(2)
Net periodic benefit income	$	(1)	$	(1)

- 25 -

OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

(unaudited)

12. CONTINGENT LIABILITIES AND OTHER MATTERS

The Company may be involved in various legal and regulatory proceedings relating to employment, antitrust, tax, product liability, environmental and other matters (collectively, “Proceedings”). The Company regularly reviews the status of such Proceedings along with legal counsel. Liabilities for such Proceedings are recorded when it is probable that the liability has been incurred and when the amount of the liability can be reasonably estimated. Liabilities are adjusted when additional information becomes available. Management believes that the amount of any reasonably possible losses in excess of any amounts accrued, if any, with respect to such Proceedings or any other known claim, including the matters described below under the caption Environmental Matters (the “Environmental Matters”), are not material to the Company’s financial statements. Management believes that the ultimate disposition of the Proceedings and the Environmental Matters will not have a material adverse effect on the Company’s financial condition. While the likelihood is remote, the disposition of the Proceedings and Environmental Matters could have a material impact on the results of operations, cash flows or liquidity in any given reporting period.

Litigation and Regulatory Proceedings

The Company is involved in litigation and regulatory proceedings from time to time in the regular course of its business. The Company believes that adequate provisions for resolution of all contingencies, claims and pending matters have been made for probable losses that are reasonably estimable.

Environmental Matters

The Company has established policies and procedures designed to ensure that its operations are conducted in compliance with all relevant laws and regulations and that enable the Company to meet its high standards for corporate sustainability and environmental stewardship. Our manufacturing facilities are subject to numerous foreign, federal, state and local laws and regulations relating to the presence of hazardous materials, pollution and protection of the environment, including emissions to air, reductions of greenhouse gases, discharges to water, management of hazardous materials, handling and disposal of solid wastes, and remediation of contaminated sites. All Company manufacturing facilities operate using an ISO 14001 or equivalent environmental management system. The Company’s 2030 Sustainability Goals include significant global reductions in energy use, water consumption, waste to landfill, and emissions of greenhouse gases, fine particulate matter, volatile organic air emissions, and biodiversity.

Owens Corning is involved in remedial response activities and is responsible for environmental remediation at a number of sites, including certain of its currently owned or formerly owned plants. These responsibilities arise under a number of laws, including, but not limited to, the Federal Resource Conservation and Recovery Act, and similar state or local laws pertaining to the management and remediation of hazardous materials and petroleum. The Company has also been named a potentially responsible party under the U.S. Federal Superfund law, or state equivalents, at a number of disposal sites. The Company became involved in these sites as a result of government action or in connection with business acquisitions. As of March 31, 2020, the Company was involved with a total of 20 sites worldwide, including 7 Superfund and state equivalent sites and 13 owned or formerly owned sites. None of the liabilities for these sites are individually significant to the Company.

Remediation activities generally involve a potential range of activities and costs related to soil, groundwater, and sediment contamination. This can include pre-cleanup activities such as fact-finding and investigation, risk assessment, feasibility studies, remedial action design and implementation (where actions may range from monitoring to removal of contaminants, to installation of longer-term remediation systems). A number of factors affect the cost of environmental remediation, including the number of parties involved in a particular site, the determination of the extent of contamination, the length of time the remediation may require, the complexity of environmental regulations, variability in clean-up standards, the need for legal action, and changes in remediation technology. Taking these factors into account, Owens Corning has predicted the costs of remediation reasonably estimated to be paid over a period of years. The Company accrues an amount on an undiscounted basis, consistent with the reasonable estimates of these costs when it is probable that a liability has been incurred. Actual cost may differ from these estimates for the reasons mentioned above. At March 31, 2020, the Company had an accrual totaling $9 million for these costs, of which the current portion is $5 million. Changes in required remediation procedures or timing of

- 26 -

OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

(unaudited)

12. CONTINGENT LIABILITIES AND OTHER MATTERS (continued)

those procedures, or discovery of contamination at additional sites, could result in material increases to the Company’s environmental obligations.

13. STOCK COMPENSATION

Description of the Plan

On April 18, 2019, the Company’s stockholders approved the Owens Corning 2019 Stock Plan (the “2019 Stock Plan”) which authorizes grants of stock options, stock appreciation rights, restricted stock awards, restricted stock units, bonus stock awards and performance stock awards. At March 31, 2020, the number of shares remaining available under the 2019 Stock Plan for all stock awards was approximately 3.5 million.

Prior to 2019, employees were eligible to receive stock awards under the Owens Corning 2016 Stock Plan and the Owens Corning 2013 Stock Plan.

Total Stock-Based Compensation Expense

Stock-based compensation expense included in Marketing and administrative expenses in the accompanying Consolidated Statements of Earnings (Loss) is as follows (in millions):

	Three Months Ended March 31,
	2020		2019
Total stock-based compensation expense	$	11	$	11

Stock Options

The Company has granted stock options under its stockholder approved stock plans. The Company calculates a weighted-average grant-date fair value using a Black-Scholes valuation model for options granted. Compensation expense for options is measured based on the fair market value of the option on the date of grant, and is recognized on a straight-line basis over a four year vesting period. In general, the exercise price of each option awarded was equal to the closing market price of the Company’s common stock on the date of grant and an option’s maximum term is 10 years. The volatility assumption was based on a benchmark study of our peers prior to 2014. Starting with the options granted in 2014, the volatility was based on the Company’s historic volatility.

The Company has not granted stock options since the year ended December 31, 2014. As of March 31, 2020, there was no unrecognized compensation cost related to stock options and the range of exercise prices on outstanding stock options was $33.73 - $42.16.

The following table summarizes the Company’s stock option activity:

		Weighted-Average
	Number of Options	Exercise Price		Remaining Contractual Life (in years)	Intrinsic Value (in millions)
Outstanding, December 31, 2019	414,800	$	37.79	3.06	$	11
Exercised	(9,675)	33.95
Outstanding, March 31, 2020	405,125	$	37.88	2.89	$	1
Exercisable, March 31, 2020	405,125	$	37.88	2.89	$	1

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OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

(unaudited)

13. STOCK COMPENSATION (continued)

Restricted Stock Awards and Restricted Stock Units

The Company has granted restricted stock awards and restricted stock units (collectively referred to as “RSUs”) under its stockholder approved stock plans. Compensation expense for RSUs is measured based on the closing market price of the stock at date of grant and is recognized on a straight-line basis over the vesting period, which is typically three or four years. The Stock Plan allows alternate vesting schedules for death, disability, and retirement. The weighted average grant date fair value of RSUs granted in 2020 was $63.65.

The following table summarizes the Company’s RSU plans:

	Number of RSUs	Weighted-Average Fair Value
Balance at December 31, 2019	1,515,706	$	51.70
Granted	382,270	63.71
Vested	(328,663)	57.74
Forfeited	(12,525)	63.33
Balance at March 31, 2020	1,556,788	$	53.24

As of March 31, 2020, there was $44 million of total unrecognized compensation cost related to restricted stock. That cost is expected to be recognized over a weighted-average period of 2.42 years. The total grant date fair value of shares vested during the three months ended March 31, 2020 and 2019 was $19 million and $18 million, respectively.

Performance Stock Awards and Performance Stock Units

The Company has granted performance stock awards and performance stock units (collectively referred to as “PSUs”) as a part of its long-term incentive plan. All outstanding performance grants will fully settle in stock. The amount of stock ultimately distributed from all performance shares is contingent on meeting internal company-based metrics or an external-based stock performance metric.

In the three months ended March 31, 2020, the Company granted both internal company-based and external-based metric PSUs.

Internal Company-based metrics

The internal company-based metrics are based on various Company metrics and typically vest over a three-year period. The amount of stock distributed will vary from 0% to 300% of PSUs awarded depending on each award's design and performance versus the internal Company-based metrics.

The initial fair value for all internal Company-based metric PSUs assumes that the performance goals will be achieved and is based on the grant date stock price. This assumption is monitored quarterly and if it becomes probable that such goals will not be achieved or will be exceeded, compensation expense recognized will be adjusted and previous surplus compensation expense recognized will be reversed or additional expense will be recognized. The expected term represents the period from the grant date to the end of the vesting period. Pro-rata vesting may be utilized in the case of death, disability or approved retirement and awards, if earned, will be paid at the end of the vesting period.

External-based metrics

The external-based metrics vest after a three-year period. Outstanding grants issued in or after 2018 are based on the Company's total stockholder return relative to the performance of the Dow Jones U.S. Construction & Materials Index. The amount of stock distributed will vary from 0% to 200% of PSUs awarded depending on the relative stockholder return performance. The fair value of external-based metric PSUs has been estimated at the grant date using a Monte Carlo simulation that uses various assumptions.

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OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

(unaudited)

13. STOCK COMPENSATION (continued)

The following table provides a summary of these assumptions for shares granted in 2020:

Expected volatility	28.43		%
Risk free interest rate	1.43		%
Expected term (in years)	2.90
Grant date fair value of units granted	$	68.60

The risk-free interest rate was based on zero coupon United States Treasury bills at the grant date. The expected term represents the period from the grant date to the end of the three-year performance period.

PSU Summary

As of March 31, 2020, there was $17 million total unrecognized compensation cost related to PSUs. That cost is expected to be recognized over a weighted-average period of 2.16 years. The total grant date fair value of shares vested during the three months ended March 31, 2020 was $1 million.

The following table summarizes the Company’s PSU activity:

	Number of PSUs	Weighted-Average Grant-Date Fair Value
Balance at December 31, 2019	312,725	$	69.23
Granted	154,078	64.28
Vested	(9,558)	84.59
Forfeited	(1,240)	73.16
Balance at March 31, 2020	456,005	$	69.94

Employee Stock Purchase Plan

The Owens Corning Employee Stock Purchase Plan (ESPP) is a tax-qualified plan under Section 423 of the Internal Revenue Code. The purchase price of shares purchased under the ESPP is equal to 85% of the lower of the fair market value of shares of Owens Corning common stock at the beginning or ending of the offering period, which is a six-month period ending on May 31 and November 30 of each year. At the approval date, 2.0 million shares were available for purchase under the ESPP. As of March 31, 2020, 0.3 million shares remain available for purchase. On April 16, 2020, the Company's stockholders approved the Amended and Restated Owens Corning Employee Stock Purchase Plan which increased the number of shares available for issuance under the plan by 4.2 million shares.

During the three months ended March 31, 2020 and 2019, the Company recognized expense of $1 million related to the Company's ESPP. As of March 31, 2020, there was $1 million of total unrecognized compensation cost related to the ESPP.

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OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

(unaudited)

14. EARNINGS PER SHARE

The following table is a reconciliation of weighted-average shares for calculating basic and diluted earnings (loss) per-share (in millions, except per share amounts):

	Three Months Ended March 31,
	2020		2019
Net earnings (loss) attributable to Owens Corning	$	(917)	$	44
Weighted-average number of shares outstanding used for basic earnings per share	108.8		109.5
Non-vested restricted and performance shares	—		0.4
Options to purchase common stock	—		0.2
Weighted-average number of shares outstanding and common equivalent shares used for diluted earnings (loss) per share	108.8		110.1
Earnings (loss) per common share attributable to Owens Corning common stockholders:
Basic	$	(8.43)	$	0.40
Diluted	$	(8.43)	$	0.40

For the three months ended March 31, 2020, diluted earnings per share was equal to basic earnings per share due to the net loss attributable to Owens Corning. For the three months ended March 31, 2019, the number of shares used in the calculation of diluted earnings per share did not include 0.7 million non-vested restricted shares and 0.1 million non-vested performance shares, due to their anti-dilutive effect.

On October 24, 2016, the Board of Directors approved a share buy-back program under which the Company is authorized to repurchase up to 10 million shares of the Company’s outstanding common stock (the “Repurchase Authorization”). The Repurchase Authorization enables the Company to repurchase shares through the open market, privately negotiated, or other transactions. The actual number of shares repurchased will depend on timing, market conditions and other factors and is at the Company’s discretion. The Company repurchased 1.3 million shares of its common stock for $81 million during the three months ended March 31, 2020, under the Repurchase Authorization. As of March 31, 2020, 2.3 million shares remain available for repurchase under the Repurchase Authorization.

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OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

(unaudited)

15. INCOME TAXES

The following table provides the Income tax expense (in millions) and effective tax rate for the periods indicated:

	Three Months Ended March 31,
	2020			2019
Income tax expense	$	24		$	39
Effective tax rate	-3		%	48		%

The difference between the effective tax rate and the U.S. federal statutory tax rate of 21% for the three months ended March 31, 2020 is primarily a result of charges related to the impairment of goodwill and certain other indefinite-lived intangible assets recorded in the three months ended March 31, 2020, which were mostly non-deductible. Non-cash charges of $18 million were recorded in the three months ended March 31, 2020 related to adjustments to valuation allowances against certain deferred tax assets. Additional items which account for the difference between the statutory rate of 21% and the effective rate are the impact of recording U.S. state and local income tax expense, the impact of U.S. federal taxes on foreign earnings, and other discrete adjustments.

The difference between the effective tax rate and the U.S. federal statutory tax rate of 21% for the three months ended March 31, 2019 is primarily due to U.S. state and local income tax expense, the impact of higher foreign tax rates, legislative changes as described in the following paragraph and other discrete adjustments.

On March 6, 2019, the U.S. Treasury and the IRS proposed regulations that provide guidance on determining the amount of a domestic corporation’s deduction for the global intangible low-taxed income (GILTI) and foreign-derived intangible income (FDII) recently added by the U.S. Tax Cuts and Jobs Act of 2017 (the "Tax Act"). The proposed regulations provide special rules in determining the deduction amount which adjusted the Company’s 2018 tax estimate resulting in an increase to tax expense of $12 million for the three months ended March 31, 2019.

The Company continues to assert indefinite reinvestment in accordance with ASC 740 based on the laws as of enactment of the Tax Act.

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OWENS CORNING AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

(unaudited)

16. CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME

The following table summarizes the changes in accumulated other comprehensive income (deficit) (in millions):

	Three Months Ended March 31,
	2020		2019
Currency Translation Adjustment
Beginning balance	$	(282)	$	(306)
Net investment hedge amounts classified into AOCI, net of tax	32		10
(Loss)/gain on foreign currency translation	(154)		1
Other comprehensive (loss)/income, net of tax	(122)		11
Ending balance	$	(404)	$	(295)
Pension and Other Postretirement Adjustment
Beginning balance	$	(326)	$	(350)
Amounts reclassified from AOCI to net earnings, net of tax (a)	7		1
Amounts classified into AOCI, net of tax	—		(2)
Other comprehensive income/(loss), net of tax	7		(1)
Ending balance	$	(319)	$	(351)
Hedging Adjustment
Beginning balance	$	(2)	$	—
Amounts classified into AOCI, net of tax	(3)		(1)
Amounts reclassified from AOCI to net earnings, net of tax (b)	2		—
Other comprehensive loss, net of tax	(1)		(1)
Ending balance	$	(3)	$	(1)
Total AOCI ending balance	$	(726)	$	(647)

(a)These AOCI components are included in the computation of total Pension and Other postretirement expense and are recorded in Non-operating income. See Note 11 for additional information.

(b)Amounts reclassified from (loss)/gain on cash flow hedges are reclassified from AOCI to income when the hedged item affects earnings and is recognized in Cost of sales or Interest expense, net depending on the hedged item. See Note 5 for additional information.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

This Management’s Discussion and Analysis (MD&A) is intended to help investors understand Owens Corning, our operations and our present business environment. MD&A is provided as a supplement to, and should be read in conjunction with, our Consolidated Financial Statements and the accompanying Notes thereto contained in this report. Unless the context requires otherwise, the terms “Owens Corning,” “Company,” “we” and “our” in this report refer to Owens Corning and its subsidiaries.

GENERAL

Owens Corning is a leading global producer of residential and commercial building materials and of glass fiber reinforcements and other materials for composites. The Company has three reportable segments: Composites, Insulation and Roofing. Through these lines of business, we manufacture and sell products worldwide. We maintain leading market positions in many of our major product categories.

EXECUTIVE OVERVIEW

Net loss attributable to Owens Corning were $917 million in the first quarter of 2020, compared to Net earnings attributable to Owens Corning of $44 million in the same period of 2019. The Company reported a loss of $866 million in earnings before interest and taxes (EBIT) for the first quarter of 2020 compared to earnings of $118 million in the same period of 2019. The Company generated $116 million in adjusted earnings before interest and taxes (“Adjusted EBIT”) for the first quarter of 2020 compared to $116 million in the same period of 2019. See the Adjusted Earnings Before Interest and Taxes paragraph of the MD&A for further information regarding EBIT and Adjusted EBIT, including the reconciliation to net earnings (loss) attributable to Owens Corning. First quarter of 2020 EBIT performance compared to the same period of 2019 increased $24 million in our Insulation segment, and decreased $13 million and $10 million in our Composites and Roofing segments, respectively.

In our Insulation segment, EBIT in the first quarter of 2020 was $39 million compared to $15 million in the same period of 2019. The $24 million increase was primarily due to higher volumes and improved manufacturing performance. In our Composites segment, EBIT was $44 million in the first quarter of 2020 compared to $57 million in the same period of 2019, primarily due to lower selling prices. In our Roofing segment, EBIT in the first quarter of 2020 was $64 million compared to $74 million in the same period in 2019, primarily due to lower sales volumes.

As part of its on-going assessment of goodwill, the Company determined that indicators of impairment had occurred during the first quarter of 2020, which resulted in the Company performing an interim impairment analysis during the first quarter of 2020. As a result of this interim impairment test, the Company recorded a non-cash impairment charge of $944 million in the quarter, which was equal to the excess of the Insulation reporting unit's carrying value over its fair value. The interim impairment analysis determined that goodwill related to the Company’s other reporting units was not impaired.

The spread of the COVID-19 virus in 2020 has caused an economic downturn on a global scale, as well as significant volatility in the financial markets. In March 2020, the World Health Organization declared the spread of the COVID-19 virus a pandemic. As of April 29, 2020, the Company’s operations have been impacted due to the extent described in the paragraphs below and as discussed in our Results of Operations. The Company cannot at this time predict the impact that the COVID-19 pandemic will have on its financial condition and operations, although we are continuing to monitor our supply chain and orders from customers for COVID-19 pandemic-related changes.

In this time of uncertainty as a result of the COVID-19 pandemic, we are continuing to serve our customers while taking every precaution to provide a safe work environment for our employees and customers. We have enacted enhanced operating protocols to assure the safety and well-being of our employees, placed restrictions on non-essential travel, and otherwise adjusted work schedules to maximize our capacity while adhering to recommended precautions such as social distancing and complying with stay-at-home orders. We may have to take further actions that we determine are in the best interests of our employees or as required by federal, state, or local authorities.

As a result of the government-mandated shutdown in India, two of our principal manufacturing sites (Taloja, India and Silvassa, India) were temporarily idled. As of April 29, 2020, these sites are now in the process of resuming operations. We will continue to adhere to restrictions imposed by local governments in the jurisdictions in which we operate.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)

The impact of the COVID-19 pandemic continues to unfold. The extent of the pandemic’s effect on our operational and financial performance will depend in large part on future developments, which cannot be predicted with confidence at this time. Future developments include the duration, scope and severity of the pandemic, the actions taken to contain or mitigate its impact, the impact on governmental programs and budgets, the development of treatments or vaccines, and the resumption of

widespread economic activity. Due to the inherent uncertainty of the unprecedented and rapidly evolving situation, we are unable to predict with any confidence the likely impact of the COVID-19 pandemic on our future operations.

In the three months ended March 31, 2020, the Company's operating activities used $52 million of cash flow, compared to $151 million in the same period in 2019. The change was primarily driven by a smaller increase in operating assets and liabilities compared to the same period in the prior year.

The Company repurchased 1.3 million shares of its common stock for $81 million during the first quarter of 2020 under a previously announced repurchase authorization (the "Share Repurchase Authorization"). As of March 31, 2020, 2.3 million shares remained available for repurchase under the Share Repurchase Authorization.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)

RESULTS OF OPERATIONS

Consolidated Results (in millions)

	Three Months Ended March 31,
	2020			2019
Net sales	$	1,601		$	1,667
Gross margin	$	306		$	325
% of net sales	19		%	19		%
Goodwill impairment charge	$	944		$	—
Other expenses, net	$	32		$	5
Earnings (loss) before interest and taxes	$	(866)		$	118
Interest expense, net	$	27		$	36
Income tax expense	$	24		$	39
Net earnings (loss) attributable to Owens Corning	$	(917)		$	44

The Consolidated Results discussion below provides a summary of our results and the trends affecting our business, and should be read in conjunction with the more detailed Segment Results discussion that follows.

NET SALES

In the first quarter 2020, net sales decreased $66 million compared to the same period in 2019. For the first quarter, the decrease in net sales was driven by the impact of lower sales volumes in our Roofing segment and the unfavorable impact of translating sales denominated in foreign currencies into United States dollars.

GROSS MARGIN

In the first quarter 2020, gross margin decreased $19 million compared to the same period in 2019, driven primarily by lower sales volumes in Roofing and lower selling prices in Composites.

GOODWILL IMPAIRMENT CHARGE

In the first quarter 2020, the Company recorded a non-cash impairment charge of $944 million related to the Insulation reporting unit, which was equal to the excess of the reporting unit's carrying value over its fair value.

OTHER EXPENSES, NET

In the first quarter 2020, other expenses, net increased $27 million compared to the same period in 2019. For the first quarter, the increase was driven primarily by intangible asset impairment charges of $43 million, partially offset by $10 million of gains on sales of precious metals used in production tooling as needs changed in response to economic and technological factors.

INTEREST EXPENSE, NET

In the first quarter 2020, interest expense, net decreased $9 million compared to the same period in 2019. For the first quarter, the decrease was primarily driven by lower outstanding debt balances and lower interest rates during the quarter.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)

INCOME TAX EXPENSE

Income tax expense for the three months ended March 31, 2020 was $24 million. For the first quarter 2020, the Company's effective tax rate was (3)%. The difference between the effective tax rate and the U.S. federal statutory tax rate of 21% for the three months ended March 31, 2020 is primarily a result of charges related to the impairment of goodwill and certain other indefinite-lived intangible assets recorded in the three months ended March 31, 2020, which were mostly non-deductible. Non-cash charges of $18 million were recorded in the three months ended March 31, 2020 related to adjustments to valuation allowances against certain deferred tax assets. Additional items which account for the difference between the statutory rate of 21% and the effective rate are the impact of recording U.S. state and local income tax expense, the impact of U.S. federal taxes on foreign earnings, and other discrete adjustments.

The realization of deferred tax assets depends on achieving a certain minimum level of future taxable income. Management currently believes that an immaterial amount of valuation allowances of certain foreign jurisdictions could be reduced within the next 12 months.

Income tax expense for the three months ended March 31, 2019 was $39 million. For the first quarter 2019, the Company's effective tax rate was 48%. The difference between the effective tax rate and the U.S. federal statutory tax rate of 21% for the three months ended March 31, 2019, was primarily due to U.S. state and local income tax expense, the impact of higher foreign tax rates, legislative changes as described in the following paragraph and other discrete adjustments.

On March 6, 2019, the U.S. Treasury and the IRS proposed regulations that provide guidance on determining the amount of a domestic corporation’s deduction for the global intangible low-taxed income (GILTI) and foreign-derived intangible income (FDII) recently added by the U.S. Tax Cuts and Jobs Act of 2017 (the “Tax Act”). The proposed regulations provide special rules in determining the deduction amount which adjusted the Company’s 2018 tax estimate resulting in an increase to tax expense of $12 million for the three months ended March 31, 2019.

Restructuring and Acquisition-Related Costs

The Company has incurred restructuring, transaction and integration costs related to acquisitions, along with restructuring costs in connection with its global cost reduction and productivity initiatives. These costs are recorded within Corporate, Other and Eliminations. Please refer to Note 9 of the Consolidated Financial Statements for further information on the nature of these costs.

The following table presents the impact and respective location of these income (expense) items on the Consolidated Statements of Earnings (Loss) (in millions):

		Three Months Ended March 31,
	Location	2020		2019
Restructuring costs	Cost of sales	$	(3)	$	(1)
Restructuring (costs) / gains	Other expenses, net	(2)		3
Total restructuring, acquisition and integration-related (costs) / gains		$	(5)	$	2

Adjusted Earnings Before Interest and Taxes

Adjusted EBIT is a non-GAAP measure that excludes certain items that management does not allocate to our segment results because it believes they are not representative of the Company's ongoing operations. Adjusted EBIT is used internally by the Company for various purposes, including reporting results of operations to the Board of Directors of the Company, analysis of performance and related employee compensation measures. Although management believes that these adjustments result in a measure that provides a useful representation of our operational performance, the adjusted measure should not be considered in isolation or as a substitute for Net earnings (loss) attributable to Owens Corning as prepared in accordance with accounting principles generally accepted in the United States.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)

Adjusting income (expense) items to EBIT are shown in the table below (in millions):

	Three Months Ended March 31,
	2020		2019
Restructuring (costs) / gains	$	(5)	$	2
Gains on sales of certain precious metals	10		—
Goodwill impairment charge	(944)		—
Intangible asset impairment charges	(43)		—
Total adjusting items	$	(982)	$	2

The reconciliation from Net earnings (loss) attributable to Owens Corning to EBIT and to Adjusted EBIT is shown in the table below (in millions):

	Three Months Ended March 31,
	2020		2019
NET EARNINGS (LOSS) ATTRIBUTABLE TO OWENS CORNING	$	(917)	$	44
Net earnings attributable to noncontrolling interests	1		—
NET EARNINGS (LOSS)	(916)		44
Equity in net earnings of affiliates	1		1
Income tax expense	24		39
EARNINGS (LOSS) BEFORE TAXES	(893)		82
Interest expense, net	27		36
EARNINGS (LOSS) BEFORE INTEREST AND TAXES	(866)		118
Adjusting items from above	(982)		2
ADJUSTED EBIT	$	116	$	116

Segment Results

EBIT by segment consists of net sales less related costs and expenses and is presented on a basis that is used internally for evaluating segment performance. Certain items, such as general corporate expenses or income and certain other expense or income items, are excluded from the internal evaluation of segment performance. Accordingly, these items are not reflected in EBIT for our reportable segments and are included in the Corporate, Other and Eliminations category, which is presented following the discussion of our reportable segments.

Composites

The table below provides a summary of net sales, EBIT and depreciation and amortization expense for the Composites segment (in millions):

	Three Months Ended March 31,
	2020			2019
Net sales	$	494		$	513
% change from prior year	-4		%	—		%
EBIT	$	44		$	57
EBIT as a % of net sales	9		%	11		%
Depreciation and amortization expense	$	38		$	39

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)

NET SALES

In our Composites segment, net sales in the first quarter 2020 decreased $19 million compared to the same period in 2019. The decrease was primarily driven by lower selling prices of $11 million and unfavorable product mix. Higher sales volumes of approximately 1% were more than offset by $7 million from the negative impact of translating sales denominated in foreign currencies into United States dollars.

EBIT

In our Composites segment, EBIT in the first quarter of 2020 decreased $13 million compared to the same period in 2019. The EBIT decline was primarily due to lower selling prices. The $13 million unfavorable impact of production curtailment actions taken to balance production with lower demand was offset by the favorable impact of improved manufacturing performance and $2 million of lower rebuild and start-up costs. The negative impact of translating sales and costs denominated in foreign currencies into United States dollars was partially offset by slightly higher sales volumes.

OUTLOOK

Global glass reinforcements market demand has historically grown with global industrial production and we believe this relationship will continue. The Company expects the COVID-19 pandemic will substantially impact the markets served by its Composites business in 2020. The magnitude of the impact will depend on the depth and duration of the crisis, as well as the timing of the recovery in the markets served by the company. The Company continues to focus on reducing costs, minimizing capital expenditures, and managing working capital.

Insulation

The table below provides a summary of net sales, EBIT and depreciation and amortization expense for the Insulation segment (in millions):

	Three Months Ended March 31,
	2020			2019
Net sales	$	603		$	591
% change from prior year	2		%	-1		%
EBIT	$	39		$	15
EBIT as a % of net sales	6		%	3		%
Depreciation and amortization expense	$	49		$	49

NET SALES

In our Insulation segment, net sales in the first quarter of 2020 increased $12 million compared to the same period in 2019. During the quarter, sales volumes were 6% higher than the same period a year ago as volume strength across the portfolio more than offset lower sales in Asia-Pacific due to the COVID-19 pandemic. Higher sales volumes were partially offset by unfavorable product and customer mix, the $9 million negative impact of translating sales denominated in foreign currencies into United States dollars, and $6 million of lower selling prices.

EBIT

In our Insulation segment, EBIT in the first quarter of 2020 increased $24 million compared to the same period in 2019. Higher sales volumes drove more than half of the EBIT increase, which was partially offset by lower selling prices. The remaining increase was driven about equally by favorable manufacturing performance and the $8 million benefit of higher fixed cost absorption on higher production volumes compared to the same period in 2019. Unfavorable customer and product mix was offset by the net $5 million gain on sale of an immaterial business in the first quarter of 2020.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)

OUTLOOK

The outlook for Insulation demand is driven by North American new residential construction, remodeling and repair activity; and commercial and industrial construction activity in the United States, Canada, Europe and Asia-Pacific. Demand in commercial and industrial insulation markets is most closely correlated to industrial production growth and overall economic activity in the global markets we serve. Demand for residential insulation is most closely correlated to U.S. housing starts.

During the first quarter of 2020, the average Seasonally Adjusted Annual Rate (SAAR) of U.S. housing starts was approximately 1.466 million, up from an annual average of approximately 1.213 million starts in the first quarter of 2019.

The Company expects the COVID-19 pandemic will substantially impact the markets served by its Insulation business in 2020. The magnitude of the impact will depend on the depth and duration of the crisis, as well as the timing of the recovery in the markets served by the company. The Company continues to focus on reducing costs, minimizing capital expenditures, and managing working capital.

Roofing

The table below provides a summary of net sales, EBIT and depreciation and amortization expense for the Roofing segment (in millions):

	Three Months Ended March 31,
	2020			2019
Net sales	$	555		$	614
% change from prior year	-10		%	-4		%
EBIT	$	64		$	74
EBIT as a % of net sales	12		%	12		%
Depreciation and amortization expense	$	14		$	13

NET SALES

In our Roofing segment, net sales in the first quarter of 2020 decreased $59 million compared to the same period in 2019. The decrease was primarily driven by lower sales volumes of approximately 8% on lower shingle volumes and lower third-party asphalt sales. The remaining difference was driven by $4 million of lower selling prices.

EBIT

In our Roofing segment, EBIT in the first quarter of 2020 decreased $10 million compared to the same period in 2019. The decrease was primarily driven by the impact of lower sales volumes, partially offset by favorable manufacturing performance of $7 million. Input cost deflation of $8 million, primarily from asphalt and resin, more than offset the impact of lower selling prices.

OUTLOOK

The Company expects the COVID-19 pandemic will substantially impact the roofing market in 2020. The magnitude of the impact will depend on the depth and duration of the crisis, as well as the timing of the recovery in the markets served by the Company. The Company continues to focus on reducing costs, minimizing capital expenditures, and managing working capital. Uncertainties that may impact our Roofing margins include demand from storm and other weather events, competitive pricing pressure and the cost and availability of raw materials, particularly asphalt.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)

Corporate, Other and Eliminations

The table below provides a summary of EBIT and depreciation and amortization expense for the Corporate, Other and Eliminations category (in millions):

	Three Months Ended March 31,
	2020		2019
Restructuring (costs) / gains	$	(5)	$	2
Gains on sales of certain precious metals	10		—
Goodwill impairment charge	(944)		—
Intangible asset impairment charges	(43)		—
General corporate expense and other	(31)		(30)
EBIT	$	(1,013)	$	(28)
Depreciation and amortization	$	15	$	12

EBIT

In Corporate, Other and Eliminations, EBIT losses for the first quarter of 2020 were higher by $985 million compared to the same period in 2019. The increase in losses in the first quarter was primarily driven by the $944 million goodwill impairment charge and $43 million of intangible asset impairment charges. Additional details of these charges is further explained in both the Critical Accounting Estimates paragraph of MD&A and Note 6 of the Consolidated Financial Statements.

General corporate expense and other for the first quarter of 2020 was relatively flat compared to the same period in 2019.

OUTLOOK

In 2020, we now estimate general corporate expenses to range between $100 million and $120 million.

LIQUIDITY, CAPITAL RESOURCES AND OTHER RELATED MATTERS

Liquidity

The Company's primary external sources of liquidity are its Senior Revolving Credit Facility and its Receivables Securitization Facility (each as defined below).

The Company has an $800 million senior revolving credit facility (the "Senior Revolving Credit Facility") that has been amended from time to time with a maturity date in May 2024.

The Company has a $280 million receivables securitization facility (the "Receivables Securitization Facility") that has been amended from time to time, which matures in April 2022.

The following table shows how the Company utilized its primary sources of liquidity (in millions):

	Balance at March 31, 2020
	Senior Revolving Credit Facility		Receivables Securitization Facility
Facility size or borrowing limit	$	800	$	280
Collateral capacity limitation on availability	n/a		—
Outstanding borrowings	400		—
Outstanding letters of credit	4		2
Availability on facility	$	396	$	278

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)

The Receivables Securitization Facility and Senior Revolving Credit Facility mature in 2022 and 2024, respectively. The Company also has a term loan (the "Term Loan"), which requires minimum quarterly principal repayments, all of which have been paid as of March 31, 2020, and full repayment by February 2021. As of March 31, 2020, the Term Loan had $150 million outstanding. The company has no significant debt maturities of senior notes before the fourth quarter of 2022. As of March 31, 2020, the Company had $3.4 billion of total debt and cash and cash equivalents of $234 million.

Cash and cash equivalents held by foreign subsidiaries may be subject to foreign withholding taxes upon repatriation to the U.S. As of March 31, 2020, and December 31, 2019, the Company had $50 million and $30 million, respectively, in cash and cash equivalents in certain of our foreign subsidiaries. The Company continues to assert indefinite reinvestment in accordance with ASC 740 based on the laws as of enactment of the tax legislation commonly known as the U.S. Tax Cuts and Jobs Act of 2017.

As a holding company, we have no operations of our own and most of our assets are held by our direct and indirect subsidiaries. Dividends and other payments or distributions from our subsidiaries will be used to meet our debt service and other obligations and to enable us to pay dividends to our stockholders. Please refer to page 13 of the Risk Factors disclosed in Item 1A of the Company's Form 10-K for the year ended December 31, 2019 (the "2019 Form 10-K") for details on the factors that could inhibit our subsidiaries' ability to pay dividends or make other distributions to the parent company.

Our anticipated uses of cash include capital expenditures, working capital needs, pension contributions, meeting financial obligations, payments of quarterly dividends as authorized by our Board of Directors, acquisitions and reducing outstanding amounts under the Senior Revolving Credit Facility, Receivables Securitization Facility and Term Loan. A sustained significant decrease in revenue in the U.S. or excessive aging of the underlying receivables as a result of the impact of the COVID-19 pandemic could materially affect the collateral capacity limitation on the availability under the Receivables Securitization Facility. We expect that our cash on hand, coupled with future cash flows from operations and other available sources of liquidity, including our Senior Revolving Credit Facility and, to the extent available, our Receivables Securitization Facility, will provide ample liquidity to enable us to meet our cash requirements.

The agreements governing our Senior Revolving Credit Facility, Receivables Securitization Facility and Term Loan contain various covenants that we believe are usual and customary. These covenants include a maximum allowed leverage ratio and a minimum required interest expense coverage ratio. We were in compliance with these covenants as of March 31, 2020.

Cash Flows

The following table presents a summary of our cash balance, cash flows, and availability on credit facilities (in millions):

	Three Months Ended March 31,
	2020		2019
Cash and cash equivalents	$	234	$	82
Net cash flow used for operating activities	$	(52)	$	(151)
Net cash flow used for investing activities	$	(61)	$	(95)
Net cash flow provided by financing activities	$	213	$	241
Availability on the Senior Revolving Credit Facility	$	396	$	748
Availability on the Receivables Securitization Facility	$	278	$	—

Cash and cash equivalents Cash and cash equivalents as of March 31, 2020 increased $152 million compared to March 31, 2019 primarily due to an additional draw on our credit facilities to increase our cash reserves during the three months ended March 31, 2020.

Operating activities: For the three months ended March 31, 2020, the Company's operating activities used $52 million of cash compared to $151 million used in the same period in 2019. The change in cash used by operating activities was primarily due to a smaller increase in operating assets and liabilities in 2020 compared to the same period of 2019.

Investing activities: Net cash flow used for investing activities decreased $34 million for the three months ended March 31, 2020 compared to the same period of 2019, primarily driven by proceeds from the sale of assets and higher derivative settlements compared to the same period in the prior year.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)

Financing activities: Net cash provided by financing activities was $213 million for the three months ended March 31, 2020, compared to net cash provided by financing activities of $241 million in the same period in 2019. The change of $28 million was primarily due to higher payments on the Term Loan in 2019 (see Note 10 of the Consolidated Financial Statements and the Liquidity section above for further discussion of activities related to debt).

2020 Investments

Capital Expenditures: The Company will continue a balanced approach to the use of its cash flows. Operational cash flow will be used to fund the Company’s growth and innovation. Given the uncertain market environment, we are focused on reducing or postponing non-critical expenses including capital expenditures in 2020; capital expenditures are now expected to be approximately $150 million to $200 million below depreciation and amortization for the year.

Tax Net Operating Losses and U.S. Foreign Tax Credits

There have been no material changes to the disclosure in our 2019 Form 10-K.

Pension Contributions

Please refer to Note 11 of the Consolidated Financial Statements. The Company expects to contribute between $25 million and $50 million in cash to its global pension plans during 2020. We will evaluate discretionary pension contributions as we continue to manage liquidity as the COVID-19 pandemic unfolds throughout the remainder of the year. Actual contributions to the plans may change as a result of several factors, including changes in laws that impact funding requirements. The ultimate cash flow impact to the Company, if any, of the pension plan liability and the timing of any such impact will depend on numerous variables, including future changes in actuarial assumptions, legislative changes to pension funding laws, and market conditions.

Derivatives

Please refer to Note 5 of the Consolidated Financial Statements.

Fair Value Measurement

Please refer to Notes 5 and 10 of the Consolidated Financial Statements.

Contractual Obligations

In the normal course of business, we enter into contractual obligations to make payments to third parties. During the three months ended March 31, 2020, there were no material changes to such contractual obligations outside the ordinary course of our business.

SAFETY

Working safely is a condition of employment at Owens Corning. We believe this organization-wide expectation provides for a safer work environment for employees, improves our manufacturing processes, reduces our costs and enhances our reputation. Furthermore, striving to be a world-class leader in safety provides a platform for all employees to understand and apply the resolve necessary to be a high-performing global organization. We measure our progress on safety based on Recordable Incidence Rate (“RIR”) as defined by the United States Department of Labor, Bureau of Labor Statistics. For the three months ended March 31, 2020, our RIR was 0.47 as compared to 0.75 in the same period a year ago.

CRITICAL ACCOUNTING ESTIMATES

Impairment of Assets. The Company exercises judgment in evaluating assets for impairment. Goodwill and other indefinite-lived intangible assets are tested for impairment annually, or when circumstances arise which could more likely than not reduce the fair value of a reporting unit below its carrying value. These tests require comparing recorded values to estimated fair values for the assets under review.

Our reporting units represent a business for which discrete financial information is available and segment management regularly reviews the operating results. The Company has three reporting units: Composites, Insulation and Roofing.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)

As of the most recent annual goodwill impairment testing date (October 1, 2019), testing indicated that the business enterprise value for the Insulation reporting unit exceeded its carrying value by approximately 10%. As described in our 2019 Form 10-K, there was uncertainty surrounding the macroeconomic factors impacting this reporting unit and a downturn in these factors or a change in the long-term revenue growth or profitability for this reporting unit could increase the likelihood of a future impairment. Accordingly, the Insulation reporting unit was the reporting unit most susceptible to an impairment during an economic downturn.

In the first quarter of 2020, the Company performed its ongoing assessment to consider whether events or circumstances had occurred that could more likely than not reduce the fair value of a reporting unit below its carrying value. The valuation limitation from the Company’s recent share price decline, the narrow cushion on the Insulation reporting unit and the high level of near-term macroeconomic uncertainty caused the Company to perform an interim goodwill impairment test as of March 31, 2020 over the Insulation reporting unit. After evaluating and weighing all relevant events and circumstances, and considering the substantial excess fair values for these reporting units, we concluded that it is not more likely than not that the fair value of the Roofing and Composites reporting units were less than their carrying values. Consequently, we determined that it was not necessary to perform an interim impairment test for the Roofing and Composites reporting units.

As part of our quantitative testing process for goodwill of the Insulation reporting unit, we estimated fair values using a discounted cash flow analysis, a form of the income approach, from the perspective of a market participant. Significant assumptions used in the discounted cash flow analysis are revenue growth rates and EBIT margins used in estimating discrete period cash flow forecasts of the reporting unit, the discount rate, and the long-term revenue growth rate and EBIT margins used in estimating the terminal business value. For our interim test, the cash flow forecasts of the reporting unit are based upon management’s near-term and long-term views of our markets and represent the forecasts used by senior management and the Board of Directors to operate the business during the COVID-19 pandemic and evaluate operating performance. The discount rate utilized is management’s estimate of what the market’s weighted average cost of capital is for a company with a similar debt rating and stock volatility, as measured by beta, which includes an additional risk premium due to uncertainty surrounding the level and pace of economic recovery. The terminal business value is determined by applying the long-term growth rate to the latest year for which a forecast exists. At this time, the Company believes that the Insulation reporting unit’s long-term market-size and profitability outlook have not meaningfully deteriorated since the time of our most recent annual impairment test. The overall enterprise fair value of the Company was limited by the recent decline in our share price. The reduction in fair value of the Insulation reporting unit, and corresponding impairment charge, was primarily driven by an increase in the discount rate arising from higher equity risk premiums that reflect significant uncertainty surrounding the effect that the COVID-19 pandemic will have on the reporting unit’s near-term cash flows and a decrease in the reporting unit's forecasted near-term cash flows. As part of our goodwill quantitative testing process, the Company evaluates whether there are reasonably likely changes to management’s estimates that would have a material impact on the results of the goodwill impairment testing. Please refer to Note 6 of the Consolidated Financial Statements for additional details on the impairment charge that was recorded in the first quarter of 2020.

The following table summarizes the segment allocation of recorded goodwill on our Consolidated Balance Sheets as of December 31, 2019 and, after giving effect to an impairment charge in our Insulation reporting unit, as of March 31, 2020 (in millions):

Segment	March 31, 2020		Percent of Total		December 31, 2019		Percent of Total
Composites	$	56	6	%	$	57	3	%
Insulation	508		53	%	1,479		77	%
Roofing	395		41	%	396		20	%
Total goodwill	$	959	100	%	$	1,932	100	%

There continues to be uncertainty surrounding the macroeconomic factors for the Insulation reporting unit, and a sustained downturn, significantly extended recovery, or a change in the long-term revenue growth or profitability for this reporting unit could increase the likelihood of an additional future impairment. Additionally, changes in market participant assumptions such as an increased discount rate or further share price reductions could increase the likelihood of a future impairment.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)

Other indefinite-lived intangible assets are the Company’s trademarks. Our most recent annual test of indefinite-lived intangibles was conducted as of October 1, 2019. The fair value of each of our indefinite-lived intangible assets was in excess of its carrying value and thus, no impairment existed. The fair value of these assets substantially exceeded the carrying value as of the date of that assessment.

During the first quarter of 2020, we performed an interim impairment test on certain trademarks and trade names used by our Insulation segment. Fair values used in testing for potential impairment of our trademarks are calculated by applying an estimated market value royalty rate to the forecasted revenues of the businesses that utilize those assets. The assumed cash flows from this calculation are discounted at a rate based on a market participant discount rate, which includes a risk premium due to the near-term economic uncertainty from the COVID-19 pandemic and its impact on the projected revenue derived from the trademarks. For two assets used by our Insulation segment, the reduction in fair values, and corresponding impairment charges, were driven by a lower expected sales outlook, the compounding effect of lower expected sales following an immaterial divestiture in the first quarter of 2020 and a higher discount rate associated with the near-term economic uncertainty from the COVID-19 pandemic. Please refer to Note 6 of the Consolidated Financial Statements for additional details on the impairment charges that were recorded in the first quarter of 2020.

For all other indefinite-lived intangible assets used by Insulation and our other segments, we continued to perform our ongoing analysis to consider whether changes in circumstances indicated that it was more likely than not that these assets were impaired. After evaluating and weighing all relevant events and circumstances, and considering the substantial excess fair values for these assets, we concluded that it is not more likely than not that the fair values of these indefinite-lived intangible assets were less than their carrying amounts. Consequently, we determined that it was not necessary to perform an interim impairment test for all other indefinite-lived intangible assets.

There were no changes to the recoverability conclusions for our long-lived assets disclosed in our 2019 Form-10-K.

Changes in management intentions, market conditions, operating performance and other similar circumstances could affect the assumptions used in these impairment tests. Changes in the assumptions could result in impairment charges that could be material to our Consolidated Financial Statements in any given period.

ACCOUNTING PRONOUNCEMENTS

Please refer to Note 1 of the Consolidated Financial Statements.

ENVIRONMENTAL MATTERS

Please refer to Note 12 of the Consolidated Financial Statements.

CAUTIONARY STATEMENT CONCERNING FORWARD-LOOKING STATEMENTS

Our disclosures and analysis in this report, including Management’s Discussion and Analysis of Financial Condition and Results of Operations, contain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934 (the "Exchange Act"). Forward-looking statements present our current forecasts and estimates of future events. These statements do not strictly relate to historical or current results and can be identified by words such as “anticipate,” "appear," "assume," “believe,” “estimate,” “expect,” "forecast," “intend,” “likely,” “may,” “plan,” “project,” "seek," "should," “strategy,” "will" and other terms of similar meaning or import in connection with any discussion of future operating, financial or other performance. These forward-looking statements are subject to risks, uncertainties and other factors and actual results may differ materially from those results projected in the statements. These risks, uncertainties and other factors include, without limitation:

•the severity and duration of the current COVID-19 pandemic on our operations, customers and suppliers, as well as related actions taken by governmental authorities and other third parties in response, each of which is uncertain, rapidly changing and difficult to predict;

•levels of residential and commercial or industrial construction activity;

•levels of global industrial production;

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)

•competitive and pricing factors;

•demand for our products;

•relationships with key customers and customer concentration in certain areas;

•industry and economic conditions that affect the market and operating conditions of our customers, suppliers or lenders;

•domestic and international economic and political conditions, policies or other governmental actions;

•legislation and related regulations or interpretations, in the United States or elsewhere;

•changes to tariff, trade or investment policies or laws;

•uninsured losses, including those from natural disasters, catastrophe, theft or sabotage;

•climate change, weather conditions and storm activity;

•availability and cost of energy and raw materials;

•environmental, product-related or other legal and regulatory liabilities, proceedings or, actions;

•research and development activities and intellectual property protection;

•issues involving implementation and protection of information technology systems;

•our level of indebtedness;

•our liquidity and the availability and cost of credit;

•levels of goodwill or other indefinite-lived intangible assets;

•achievement of expected synergies, cost reductions and/or productivity improvements;

•the level of fixed costs required to run our business;

•our ability to utilize our net operating loss carryforwards and foreign tax credits;

•issues related to acquisitions, divestitures and joint ventures or expansions;

•foreign exchange and commodity price fluctuations;

•price volatility in certain wind energy markets in the U.S;

•loss of key employees, labor disputes or shortages; and

•defined benefit plan funding obligations.

All forward-looking statements in this report should be considered in the context of the risks and other factors described above and in Item 1A - Risk factors in Part I of our 2019 Form 10-K. Any forward-looking statements speak only as of the date the statement is made and we undertake no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by federal securities laws. It is not possible to identify all of the risks, uncertainties and other factors that may affect future results. In light of these risks and uncertainties, the forward-looking events and circumstances discussed in this report may not occur and actual results may differ materially from those anticipated or implied in the forward-looking statements. Accordingly, users of this report are cautioned not to place undue reliance on the forward-looking statements.

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

There has been no material change in our exposure to market risk during the three months ended March 31, 2020. Please refer to "Quantitative and Qualitative Disclosures about Market Risk" contained in Part II, Item 7A of our 2019 Form 10-K for a discussion of our exposure to market risk.

ITEM 4. CONTROLS AND PROCEDURES

The Company maintains (a) disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act), and (b) internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act).

The Company’s management, with the participation of the Company’s Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of the Company’s disclosure controls and procedures as of the end of the period covered by this report. Based on such evaluation, the Company’s Chief Executive Officer and Chief Financial Officer have concluded that, as of the end of such period, the Company’s disclosure controls and procedures are effective.

There has been no change in the Company's internal control over financial reporting during the quarter ended March 31, 2020 that materially affected, or is reasonably likely to materially affect, the Company's internal control over financial reporting. Despite temporary work-from-home requirements for a significant portion of our administrative employees, the changes have had a minimal effect on the Company's accounting processes and internal control over financial reporting during the quarter ended March 31, 2020.

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PART II

ITEM 1. LEGAL PROCEEDINGS

Information required by this item is incorporated by reference to Note 12 of the Consolidated Financial Statements, Contingent Liabilities and Other Matters.

ITEM 1A. RISK FACTORS

The information set forth in this report, including without limitation, the risk factor presented below, updates and should be read in conjunction with, the risk factors and information disclosed in Part 1, Item 1A., "Risk Factors," in our Annual Report on Form 10-K for the year ended December 31, 2019.

The recent COVID-19 pandemic is expected to have a significant impact on the Company's operations and results.

Beginning in the first quarter of 2020, we have been managing matters related to the global COVID-19 pandemic, including the following impacts:

•We believe that COVID-19 has placed downward pressure on demand for some of our products, on at least a temporary basis.

•Governmental authorities have implemented numerous measures to contain the virus, such as travel bans and restrictions, quarantines, shelter-in-place orders and business shutdowns. A small number of our facilities and operations have been adversely affected by these governmental actions.

•These governmental actions as well as downward pressure on demand have caused us to curtail some production as we comply with relevant government decrees and attempt to balance demand with inventory and output.

•We have recorded an impairment to goodwill that was driven, at least in part, by an increase in the discount rate arising from higher equity risk premiums that reflect significant uncertainty surrounding the effect that COVID-19 will have on the Insulation reporting unit’s near-term cash flows.

•The Company has continued to focus on reducing costs, minimizing capital expenditures and managing working capital during the COVID-19 pandemic.

In response to the pandemic, we implemented a number of precautionary and other measures to promote business continuity. These measures have been comprehensive and included initiatives regarding employee health and safety, working conditions (including remote working), engagements with customers and suppliers, financial management, operational efficiency, internal and external communications, government relations and community outreach. While we believe that all of these measures have been necessary or appropriate, they have resulted in additional costs and may adversely impact our business and financial performance in the future or expose us to additional unknown risks.

Although it is not possible to predict the ultimate impact of COVID-19, including on our business, results of operations, financial position or cash flows, such impacts may be material and may include:

•shifting customer demand for our products in the markets that we serve around the world;

•increased credit risk, including increased failure by customers experiencing business disruptions to make timely payments;

•reduced availability and productivity of employees;

•costs associated with production curtailments that are driven by governmental actions, customer demand or other causes related to COVID-19;

•increased operational risks resulting from changes to operations and remote work arrangements, including the potential effects on internal controls and procedures, cybersecurity risks and increased vulnerability to security breaches, information technology disruptions and other similar events;

•higher costs in certain areas such as transportation and distribution, as well as incremental costs associated with health screenings, temperature checks and enhanced cleaning and sanitation protocols to protect our employees and others;

•delays and disruptions in the availability of and timely delivery of materials and equipment used in our operations, as well as increased costs for such materials and equipment;

•a negative impact on our liquidity position, as well as increased costs and less ability to access funds under our existing credit facilities and the capital markets;

•any further impairment in the value of tangible or intangible assets that could be recorded as a result of weaker or more volatile economic conditions; and

•administrative proceedings, litigation or regulatory compliance matters.

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ITEM 1A. RISK FACTORS (continued)

The impact of the COVID-19 pandemic may also exacerbate other risks discussed in Item 1A. “Risk Factors” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2019, any of which could have a material effect on us. The impact depends on the severity and duration of the current COVID-19 pandemic and actions taken by governmental authorities and other third parties in response, each of which is uncertain, rapidly changing and difficult to predict.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

Recent Sales of Unregistered Securities; Use of Proceeds from Registered Securities

None.

Issuer Purchases of Equity Securities

The following table provides information about Owens Corning’s purchases of its common stock for each month during the quarterly period covered by this report:

Period	Total Number of Shares (or Units) Purchased		Average Price Paid per Share (or Unit)		Total Number of Shares (or Units) Purchased as Part of Publicly Announced Plans or Programs**	Maximum Number (or Approximate Dollar Value) of Shares (or Units) that May Yet Be Purchased Under the Plans or Programs**
January 1-31, 2020	641,281		$	64.39	620,000	2,961,726
February 1-29, 2020	893,022		61.23		675,000	2,286,726
March 1-31, 2020	109		58.42		—	2,286,726
Total	1,534,412	*	$	62.55	1,295,000	2,286,726

* The Company retained an aggregate of 239,412 shares surrendered to satisfy tax withholding obligations in connection with the vesting of restricted shares granted to our employees.

** On October 24, 2016, the Board of Directors approved a share buy-back program under which the Company is authorized to repurchase up to 10 million shares of the Company’s outstanding common stock (the “Repurchase Authorization”). The Repurchase Authorization enables the Company to repurchase shares through the open market, privately negotiated transactions, or other transactions. The actual number of shares repurchased will depend on timing, market conditions and other factors and is at the Company’s discretion. The Company repurchased 1.3 million shares of its common stock for $81 million during the three months ended March 31, 2020 under the Repurchase Authorization. As of March 31, 2020, 2.3 million shares remain available for repurchase under the Repurchase Authorization.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5. OTHER INFORMATION

None.

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ITEM 6. EXHIBITS

Exhibit Number	Description
10.1	Amended and Restated Owens Corning Employee Stock Purchase Plan (incorporated by reference to Exhibit 10.1 to Owens Corning's Current Report on Form 8-K (File No. 1-33100), filed April 21, 2020).*
31.1	Certification of Chief Executive Officer pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a) (filed herewith).
31.2	Certification of Chief Financial Officer pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a) (filed herewith).
32.1	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350 (furnished herewith).
32.2	Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350 (furnished herewith).
101	The following materials from the Quarterly Report on Form 10-Q for Owens Corning for the period ended March 31, 2020, formatted in iXBRL (Inline Extensible Business Reporting Language): (i) Consolidated Statements of Earnings (Loss), (ii) Consolidated Statements of Comprehensive Earnings (Loss); (iii) Consolidated Balance Sheets (iv) Consolidated Statements of Stockholders' Equity, (v) Consolidated Statements of Cash Flows, (vi) related noted to these financial statements and (vii) document and entity information.
104	The cover page from this Quarterly Report on Form 10-Q, formatted as Inline XBRL.

*Denotes management contract or compensatory plan or arrangement required to be filed as an exhibit pursuant to Form 10-K.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, Owens Corning has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

			OWENS CORNING
			Registrant
Date:	April 29, 2020	By:	/s/ Prithvi S. Gandhi
			Prithvi S. Gandhi
			Interim Chief Financial Officer
Date:	April 29, 2020	By:	/s/ Kelly J. Schmidt
			Kelly J. Schmidt
			Vice President and
			Controller

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Brian D. Chambers, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Owens Corning;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: April 29, 2020

/s/  Brian D. Chambers 

Brian D. Chambers

Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Prithvi S. Gandhi, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Owens Corning;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: April 29, 2020

/s/  Prithvi S. Gandhi  

Prithvi S. Gandhi

Interim Chief Financial Officer

EX-32.1

Exhibit 32.1

SECTION 1350 CERTIFICATION

In connection with the Quarterly Report on Form 10-Q of Owens Corning (the “Company”) for the quarterly period ended March 31, 2020 (the “Report”), I, Brian D. Chambers, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)Information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/  Brian D. Chambers 

Brian D. Chambers

Chief Executive Officer

April 29, 2020

EX-32.2

Exhibit 32.2

SECTION 1350 CERTIFICATION

In connection with the Quarterly Report on Form 10-Q of Owens Corning (the “Company”) for the quarterly period ended March 31, 2020 (the “Report”), I, Prithvi S. Gandhi, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)Information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/  Prithvi S. Gandhi  

Prithvi S. Gandhi

Interim Chief Financial Officer

April 29, 2020

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DERIVATIVE FINANCIAL INSTRUMENTS

3 Months Ended

Mar. 31, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

DERIVATIVE FINANCIAL INSTRUMENTS

DERIVATIVE FINANCIAL INSTRUMENTS

The Company is exposed to, among other risks, the impact of changes in commodity prices, foreign currency exchange rates, and interest rates in the normal course of business. The Company’s risk management program is designed to manage the exposure and volatility arising from these risks, and utilizes derivative financial instruments to offset a portion of these risks. The Company uses derivative financial instruments only to the extent necessary to hedge identified business risks, and does not enter into such transactions for trading purposes.

The Company generally does not require collateral or other security with counterparties to these financial instruments and is therefore subject to credit risk in the event of nonperformance; however, the Company monitors credit risk and currently does not anticipate nonperformance by other parties. Contracts with counterparties generally contain right of offset provisions. These provisions effectively reduce the Company’s exposure to credit risk in situations where the Company has gain and loss positions outstanding with a single counterparty. It is the Company’s policy to offset on the Consolidated Balance Sheets the amounts recognized for derivative instruments with any cash collateral arising from derivative instruments executed with the same counterparty under a master netting agreement. As of March 31, 2020 and December 31, 2019, the Company did not have any amounts on deposit with any of its counterparties, nor did any of its counterparties have any amounts on deposit with the Company.

Derivative Fair Values

Our derivatives consist of natural gas forward swaps, cross-currency swaps, foreign exchange forward contracts and U.S. treasury rate lock agreements, all of which are over-the-counter and not traded through an exchange. The Company uses widely accepted valuation tools to determine fair value, such as discounting cash flows to calculate a present value for the derivatives. The models use Level 2 inputs, such as forward curves and other commonly quoted observable transactions and prices. The fair value of our derivatives and hedging instruments are all classified as Level 2 investments within the three-tier hierarchy.

The following table presents the fair value of derivatives and hedging instruments and the respective location on the Consolidated Balance Sheets (in millions):

		Fair Value at
	Location	March 31, 2020		December 31, 2019
Derivative assets designated as hedging instruments:
Net investment hedges:
Cross-currency swaps	Other current assets	$	13	$	12
Cross-currency swaps	Other non-current assets	$	38	$	1
Derivative liabilities designated as hedging instruments:
Net investment hedges:
Cross-currency swaps	Other liabilities	$	—	$	4
Cash flow hedges:
Natural gas forward swaps	Current liabilities	$	3	$	3
Treasury interest rate lock	Other liabilities	$	1	$	—
Derivative assets not designated as hedging instruments:
Foreign exchange forward contracts	Other current assets	$	12	$	9
Derivative liabilities not designated as hedging instruments:
Foreign exchange forward contracts	Current liabilities	$	6	$	1

Consolidated Statements of Earnings (Loss) Activity

The following table presents the impact and respective location of derivative activities on the Consolidated Statements of Earnings (Loss) (in millions):

		Three Months Ended March 31,
	Location	2020		2019
Derivative activity designated as hedging instruments:
Natural gas cash flow hedges:
Amount of loss reclassified from AOCI (as defined below) into earnings	Cost of sales	$	2	$	—
Cross-currency swap net investment hedges:
Amount of gain recognized in earnings on derivative amounts excluded from effectiveness testing	Interest expense, net	$	(3)	$	(3)
Derivative activity not designated as hedging instruments:
Foreign currency:
Amount of gain recognized in earnings (a)	Other expenses, net	$	(12)	$	(19)

(a)Gains related to foreign currency derivatives were substantially offset by net revaluation impacts on foreign currency denominated balance sheet exposures, which were also recorded in Other expenses, net. Please refer to the "Other Derivatives" section below for additional detail.

Consolidated Statements of Comprehensive Earnings (Loss) Activity

The following table presents the impact of derivative activities on the Consolidated Statements of Comprehensive Earnings (Loss) (in millions):

		Amount of (Gain) Loss Recognized in Comprehensive Earnings (Loss)
		Three Months Ended March 31,
Hedging Type	Derivative Financial Instrument	2020		2019
Net investment hedge	Cross-currency swaps	$	(42)	$	(13)
Cash flow hedge	Natural gas forward swaps	$	—	$	2
Cash flow hedge	Treasury interest rate lock	$	1	$	—

Cash Flow Hedges

The Company uses a combination of derivative financial instruments, which qualify as cash flow hedges, and physical contracts to manage forecasted exposure to electricity and natural gas prices. As of March 31, 2020, the notional amounts of these natural gas forward swaps was 7 MMBtu (or MMBtu equivalent) based on U.S. and European indices.

In March 2020, the Company entered into a $175 million forward U.S. Treasury rate lock agreement to manage the U.S. Treasury portion of its interest rate risk associated with the anticipated issuance of 10-year fixed rate senior notes before the end of 2022. The Company intends to cash settle these agreements upon issuance of the senior notes thereby effectively locking in the U.S. Treasury fixed interest rate in effect at the time the agreement was initiated. The locked fixed rate of this agreement is 0.994%. The Company has designated this outstanding forward U.S. Treasury rate lock agreement, which expires on December 15, 2022, as a cash flow hedge.

Net Investment Hedges

The Company has translation exposure resulting from translating the financial statements of foreign subsidiaries into U.S. Dollars, which is recognized in Currency translation adjustment (a component of AOCI). The Company uses cross-currency forward contracts to hedge a portion of the net investment in foreign subsidiaries against fluctuations in foreign exchange rates. As of March 31, 2020, the notional amount of these derivative financial instruments was $516 million related to the U.S. Dollar and European Euro.

Other Derivatives

The Company uses forward currency exchange contracts to manage existing exposures to foreign exchange risk related to assets and liabilities recorded on the Consolidated Balance Sheets. As of March 31, 2020, the Company had notional amounts of $711 million for non-designated derivative financial instruments related to foreign currency exposures in U.S. Dollars primarily related to Brazilian Real, Chinese Yuan, European Euro, Hong Kong Dollar, Indian Rupee, and South Korean Won. In addition, the Company had notional amounts of $69 million for non-designated derivative financial instruments related to foreign currency exposures in European Euro primarily related to the Russian Ruble and Czech Koruna.

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GENERAL

3 Months Ended

Mar. 31, 2020

Accounting Changes and Error Corrections [Abstract]

GENERAL

GENERAL

Unless the context requires otherwise, the terms “Owens Corning,” “Company,” “we” and “our” in this report refer to Owens Corning, a Delaware corporation, and its subsidiaries.

The Consolidated Financial Statements included in this report are unaudited, pursuant to certain rules and regulations of the Securities and Exchange Commission, and include, in the opinion of the Company, normal recurring adjustments necessary for a fair statement of the results for the periods indicated, which, however, are not necessarily indicative of results which may be expected for the full year. The December 31, 2019 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 ("U.S."). In connection with the Consolidated Financial Statements and Notes included in this report, reference is made to the Consolidated Financial Statements and Notes contained in the Company’s Form 10-K for the year ended December 31, 2019 (the "2019 Form 10-K"). Certain reclassifications have been made to the periods presented for 2019 to conform to the classifications used in the periods presented for 2020.

Cash, Cash Equivalents and Restricted Cash

On the Consolidated Statements of Cash Flows, the total of Cash, cash equivalents and restricted cash includes restricted cash of $7 million, $7 million, $8 million and $7 million as of March 31, 2020, December 31, 2019, March 31, 2019 and December 31, 2018, respectively. Restricted cash primarily represents amounts received from a counterparty related to its performance assurance on an executory contract, which is included in Other current assets on the Consolidated Balance Sheets. These amounts are contractually required to be set aside, and the counterparty can exchange the cash for another form of performance assurance at its discretion.

Accounts Receivable

Trade accounts receivable are recorded at the invoiced amount and do not bear interest. Consistent with the requirements of ASU 2016-13, "Financial Instruments - Credit Losses (Topic 236)," the allowance for doubtful accounts is based on the Company’s assessment of the collectibility of customer accounts. The Company regularly reviews the allowance by considering factors such as historical experience, credit quality, the age of the accounts receivable balances, and current economic conditions that may affect a customer’s ability to pay. Account balances are charged off against the allowance when the Company believes it is probable the receivable will not be recovered.

Accounting Pronouncements

The following table summarizes recent ASU's issued by the Financial Accounting Standards Board (FASB) that could have an impact on the Company's Consolidated Financial Statements:

Standard	Description	Effective Date for Company	Effect on the Consolidated Financial Statements
Recently adopted standards:
ASU 2016-13 "Financial Instruments - Credit Losses (Topic 326)," as amended by ASU 2018-19, 2019-04, 2019-05, 2019-10, 2019-11, and 2020-02	This standard replaces the incurred loss methodology for recognizing credit losses with a current expected credit losses model and applies to all financial assets, including trade receivables. Entities will adopt the standard using a modified-retrospective approach.	January 1, 2020	We adopted this standard using the modified-retrospective approach in the first quarter of 2020. The adoption of this standard did not have a material impact on our Consolidated Financial Statements. Please refer to the Accounts Receivable paragraph above in Note 1 of the Consolidated Financial Statements for additional detail on our accounting policy.
ASU 2017-04 "Intangibles - Goodwill and Other (Topic 350)"	This standard simplifies the test for goodwill impairment by eliminating Step 2 of the impairment test. If the carrying amount of a reporting unit exceeds its fair value, an impairment loss shall be recognized in an amount equal to that excess, limited to the total amount of goodwill allocated to that reporting unit. Entities will adopt the standard using a prospective approach.	January 1, 2020	We adopted this standard using the prospective approach for our interim impairment test conducted in the first quarter of 2020. The goodwill impairment charge of $944 million recorded for the three months ended March 31, 2020, was calculated in accordance with this standard. Please refer to Note 6 of the Consolidated Financial Statements for additional detail on this adoption.
Recently issued standard:
ASU 2019-12 "Income Taxes (Topic 740)"	This standard simplifies accounting for income taxes including such topics as intraperiod tax allocations, franchise taxes and separate company financial statements.	January 1, 2021	We are currently assessing the impact this standard will have on our Consolidated Financial Statements.

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STOCK COMPENSATION (Tables)

3 Months Ended

Mar. 31, 2020

Share-based Payment Arrangement [Abstract]

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award

Stock-based compensation expense included in Marketing and administrative expenses in the accompanying Consolidated Statements of Earnings (Loss) is as follows (in millions):

	Three Months Ended March 31,
	2020		2019
Total stock-based compensation expense	$	11	$	11

Schedule of Share-based Compensation, Stock Options, Activity

The following table summarizes the Company’s stock option activity:

		Weighted-Average
	Number of Options	Exercise Price		Remaining Contractual Life (in years)	Intrinsic Value (in millions)
Outstanding, December 31, 2019	414,800	$	37.79	3.06	$	11
Exercised	(9,675)	33.95
Outstanding, March 31, 2020	405,125	$	37.88	2.89	$	1
Exercisable, March 31, 2020	405,125	$	37.88	2.89	$	1

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity

The following table summarizes the Company’s RSU plans:

	Number of RSUs	Weighted-Average Fair Value
Balance at December 31, 2019	1,515,706	$	51.70
Granted	382,270	63.71
Vested	(328,663)	57.74
Forfeited	(12,525)	63.33
Balance at March 31, 2020	1,556,788	$	53.24

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The following table provides a summary of these assumptions for shares granted in 2020:

Expected volatility	28.43		%
Risk free interest rate	1.43		%
Expected term (in years)	2.90
Grant date fair value of units granted	$	68.60

Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Performance-Based Units, Vested and Expected to Vest

The following table summarizes the Company’s PSU activity:

	Number of PSUs	Weighted-Average Grant-Date Fair Value
Balance at December 31, 2019	312,725	$	69.23
Granted	154,078	64.28
Vested	(9,558)	84.59
Forfeited	(1,240)	73.16
Balance at March 31, 2020	456,005	$	69.94

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REVENUE (Tables)

3 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following table shows a disaggregation of Net sales (in millions):

	For the three months ended March 31, 2020
Reportable Segments	Composites		Insulation		Roofing		Eliminations		Consolidated
Disaggregation Categories
U.S. residential	$	66	$	211	$	492	$	(50)	$	719
U.S. commercial and industrial	151		162		28		—		341
Europe	141		143		4		(1)		287
Asia-Pacific	105		20		3		—		128
Rest of world	31		67		28		—		126
NET SALES	$	494	$	603	$	555	$	(51)	$	1,601

	For the three months ended March 31, 2019
Reportable Segments	Composites		Insulation		Roofing		Eliminations		Consolidated
Disaggregation Categories
U.S. residential	$	67	$	196	$	551	$	(48)	$	766
U.S. commercial and industrial	154		155		25		—		334
Europe	150		143		4		(1)		296
Asia-Pacific	112		34		3		—		149
Rest of world	30		63		31		(2)		122
NET SALES	$	513	$	591	$	614	$	(51)	$	1,667

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PROPERTY, PLANT AND EQUIPMENT (Tables)

3 Months Ended

Mar. 31, 2020

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, plant and equipment consist of the following (in millions):

	March 31, 2020		December 31, 2019
Land	$	215	$	221
Buildings and leasehold improvements	1,174		1,186
Machinery and equipment	4,984		4,978
Construction in progress	218		310
	6,591		6,695
Accumulated depreciation	(2,844)		(2,840)
Property, plant and equipment, net	$	3,747	$	3,855

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WARRANTIES (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Movement In Standard And Extended Product Warranty Increase Decrease Roll Forward
Product warranty accrual, beginning balance	$ 64	$ 60
Amounts accrued for current year	4	4
Settlements of warranty claims	(3)	(3)
Product warranty accrual, ending balance	$ 65	$ 61

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GOODWILL AND OTHER INTANGIBLE ASSETS - GOODWILL ROLLFORWARD (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Goodwill [Line Items]
Balance at beginning of period	$ 1,932
Impairment charge	944	$ 0
Divestiture	4
Foreign currency translation	(25)
Balance at end of period	959
Composites
Goodwill [Line Items]
Balance at beginning of period	57
Impairment charge	0
Divestiture	0
Foreign currency translation	(1)
Balance at end of period	56
Insulation
Goodwill [Line Items]
Balance at beginning of period	1,479
Impairment charge	944
Divestiture	4
Foreign currency translation	(23)
Balance at end of period	508
Roofing
Goodwill [Line Items]
Balance at beginning of period	396
Impairment charge	0
Divestiture	0
Foreign currency translation	(1)
Balance at end of period	$ 395

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CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
NET SALES	$ 1,601.0	$ 1,667.0
COST OF SALES	1,295.0	1,342.0
Gross margin	306.0	325.0
OPERATING EXPENSES
Marketing and administrative expenses	179.0	182.0
Science and technology expenses	21.0	22.0
Goodwill impairment charge	944.0	0.0
Other expenses, net	32.0	5.0
Total operating expenses	1,176.0	209.0
OPERATING INCOME (LOSS)	(870.0)	116.0
Non-operating income	(4.0)	(2.0)
EARNINGS (LOSS) BEFORE INTEREST AND TAXES	(866.0)	118.0
Interest expense, net	27.0	36.0
EARNINGS (LOSS) BEFORE TAXES	(893.0)	82.0
Income tax expense	24.0	39.0
Equity in net earnings of affiliates	1.0	1.0
NET EARNINGS (LOSS)	(916.0)	44.0
Net earnings attributable to noncontrolling interests	1.0	0.0
NET EARNINGS (LOSS) ATTRIBUTABLE TO OWENS CORNING	$ (917.0)	$ 44.0
EARNINGS (LOSS) PER COMMON SHARE ATTRIBUTABLE TO OWENS CORNING COMMON STOCKHOLDERS
Basic (in dollars per share)	$ (8.43)	$ 0.40
Diluted (in dollars per share)	$ (8.43)	$ 0.40
WEIGHTED AVERAGE COMMON SHARES
Basic (in shares)	108,800	109,500
Diluted (in shares)	108,800	110,100

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PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2020
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Contributions by employer	$ 11
Pension Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	2	$ 2
Interest cost	9	12
Expected return on plan assets	(15)	(17)
Amortization of actuarial loss	4	4
Net periodic benefit income	0	1
Other Postretirement Benefits Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	0	0
Interest cost	2	2
Amortization of prior service credit	(1)	(1)
Amortization of actuarial loss	(2)	(2)
Net periodic benefit income	(1)	(1)
U.S. | Pension Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	1	1
Interest cost	7	9
Expected return on plan assets	(11)	(13)
Amortization of actuarial loss	3	3
Net periodic benefit income	0	0
Foreign Plan | Pension Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	1	1
Interest cost	2	3
Expected return on plan assets	(4)	(4)
Amortization of actuarial loss	1	1
Net periodic benefit income	$ 0	$ 1
Minimum | Scenario, Forecast | U.S.
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Expected future employer contributions, current fiscal year			$ 10
Minimum | Scenario, Forecast | Foreign Plan
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Expected future employer contributions, current fiscal year			15
Maximum | Scenario, Forecast | U.S.
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Expected future employer contributions, current fiscal year			25
Maximum | Scenario, Forecast | Foreign Plan
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Expected future employer contributions, current fiscal year			$ 25

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CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 9	$ 11
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, authorized	10,000,000	10,000,000
Preferred stock, issued	0	0
Preferred stock, outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized	400,000,000	400,000,000
Common stock, issued	135,500,000	135,500,000
Common stock, outstanding	108,600,000	109,000,000
Treasury stock shares	26,900,000	26,500,000

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DERIVATIVE FINANCIAL INSTRUMENTS INCOME STATEMENT (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Cost of sales | Designated as Hedging Instrument | Energy Related Derivative
Derivative Instruments Gain Loss [Line Items]
Amount of loss reclassified from AOCI (as defined below) into earnings		$ (2)	$ 0
Interest expense, net | Designated as Hedging Instrument | Interest Rate Swap
Derivative Instruments Gain Loss [Line Items]
Derivative, Gain on Derivative		(3)	(3)
Other Expense | Nondesignated as Hedging Instrument | Foreign Exchange Contract
Derivative Instruments Gain Loss [Line Items]
Amount of (gain)/loss recognized in earnings	[1]	(12)	(19)
Net Investment Hedging | Cross Currency Interest Rate Contract
Derivative Instruments Gain Loss [Line Items]
Amount of (gain)/loss recognized in earnings		42	13
Cash Flow Hedging | Energy Related Derivative
Derivative Instruments Gain Loss [Line Items]
Amount of (gain)/loss recognized in earnings		0	(2)
Cash Flow Hedging | Treasury interest rate lock
Derivative Instruments Gain Loss [Line Items]
Amount of (gain)/loss recognized in earnings		$ (1)	$ 0

[1] Gains related to foreign currency derivatives were substantially offset by net revaluation impacts on foreign currency denominated balance sheet exposures, which were also recorded in Other expenses, net. Please refer to the "Other Derivatives" section below for additional detail.

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INCOME TAXES (Tables)

3 Months Ended

Mar. 31, 2020

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation

The following table provides the Income tax expense (in millions) and effective tax rate for the periods indicated:

	Three Months Ended March 31,
	2020			2019
Income tax expense	$	24		$	39
Effective tax rate	-3		%	48		%

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REVENUE - Disaggregated Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Disaggregated revenue	$ 1,601	$ 1,667
Europe
Disaggregation of Revenue [Line Items]
Disaggregated revenue	287	296
Asia Pacific
Disaggregation of Revenue [Line Items]
Disaggregated revenue	128	149
Rest of world
Disaggregation of Revenue [Line Items]
Disaggregated revenue	126	122
Composites
Disaggregation of Revenue [Line Items]
Disaggregated revenue	494	513
Composites | Europe
Disaggregation of Revenue [Line Items]
Disaggregated revenue	141	150
Composites | Asia Pacific
Disaggregation of Revenue [Line Items]
Disaggregated revenue	105	112
Composites | Rest of world
Disaggregation of Revenue [Line Items]
Disaggregated revenue	31	30
Insulation
Disaggregation of Revenue [Line Items]
Disaggregated revenue	603	591
Insulation | Europe
Disaggregation of Revenue [Line Items]
Disaggregated revenue	143	143
Insulation | Asia Pacific
Disaggregation of Revenue [Line Items]
Disaggregated revenue	20	34
Insulation | Rest of world
Disaggregation of Revenue [Line Items]
Disaggregated revenue	67	63
Roofing
Disaggregation of Revenue [Line Items]
Disaggregated revenue	555	614
Roofing | Europe
Disaggregation of Revenue [Line Items]
Disaggregated revenue	4	4
Roofing | Asia Pacific
Disaggregation of Revenue [Line Items]
Disaggregated revenue	3	3
Roofing | Rest of world
Disaggregation of Revenue [Line Items]
Disaggregated revenue	28	31
Eliminations
Disaggregation of Revenue [Line Items]
Disaggregated revenue	(51)	(51)
Eliminations | Europe
Disaggregation of Revenue [Line Items]
Disaggregated revenue	(1)	(1)
Eliminations | Asia Pacific
Disaggregation of Revenue [Line Items]
Disaggregated revenue	0	0
Eliminations | Rest of world
Disaggregation of Revenue [Line Items]
Disaggregated revenue	0	(2)
Residential | U.S.
Disaggregation of Revenue [Line Items]
Disaggregated revenue	719	766
Residential | Composites | U.S.
Disaggregation of Revenue [Line Items]
Disaggregated revenue	66	67
Residential | Insulation | U.S.
Disaggregation of Revenue [Line Items]
Disaggregated revenue	211	196
Residential | Roofing | U.S.
Disaggregation of Revenue [Line Items]
Disaggregated revenue	492	551
Residential | Eliminations | U.S.
Disaggregation of Revenue [Line Items]
Disaggregated revenue	(50)	(48)
Commercial and Industrial Sector | U.S.
Disaggregation of Revenue [Line Items]
Disaggregated revenue	341	334
Commercial and Industrial Sector | Composites | U.S.
Disaggregation of Revenue [Line Items]
Disaggregated revenue	151	154
Commercial and Industrial Sector | Insulation | U.S.
Disaggregation of Revenue [Line Items]
Disaggregated revenue	162	155
Commercial and Industrial Sector | Roofing | U.S.
Disaggregation of Revenue [Line Items]
Disaggregated revenue	28	25
Commercial and Industrial Sector | Eliminations | U.S.
Disaggregation of Revenue [Line Items]
Disaggregated revenue	$ 0	$ 0

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STOCK COMPENSATION - Restricted Stock Activity (Details) - Restricted Stock Units (RSUs)	3 Months Ended
	Mar. 31, 2020 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Balance at December 31, 2019 | shares	1,515,706
Granted (in shares) | shares	382,270
Vested (in shares) | shares	(328,663)
Forfeited (in shares) | shares	(12,525)
Balance at March 31, 2020 | shares	1,556,788
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Balance at December 31, 2019 | $ / shares	$ 51.70
Granted, weighted average grant date fair value | $ / shares	63.71
Vested, weighted average grant date fair value | $ / shares	57.74
Forfeited, weighted average grant date fair value | $ / shares	63.33
Balance at March 31, 2020 | $ / shares	$ 53.24

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STOCK COMPENSATION

3 Months Ended

Mar. 31, 2020

Share-based Payment Arrangement [Abstract]

STOCK COMPENSATION

STOCK COMPENSATION

Description of the Plan

On April 18, 2019, the Company’s stockholders approved the Owens Corning 2019 Stock Plan (the “2019 Stock Plan”) which authorizes grants of stock options, stock appreciation rights, restricted stock awards, restricted stock units, bonus stock awards and performance stock awards. At March 31, 2020, the number of shares remaining available under the 2019 Stock Plan for all stock awards was approximately 3.5 million.

Prior to 2019, employees were eligible to receive stock awards under the Owens Corning 2016 Stock Plan and the Owens Corning 2013 Stock Plan.

Total Stock-Based Compensation Expense

Stock-based compensation expense included in Marketing and administrative expenses in the accompanying Consolidated Statements of Earnings (Loss) is as follows (in millions):

	Three Months Ended March 31,
	2020		2019
Total stock-based compensation expense	$	11	$	11

Stock Options

The Company has granted stock options under its stockholder approved stock plans. The Company calculates a weighted-average grant-date fair value using a Black-Scholes valuation model for options granted. Compensation expense for options is measured based on the fair market value of the option on the date of grant, and is recognized on a straight-line basis over a four year vesting period. In general, the exercise price of each option awarded was equal to the closing market price of the Company’s common stock on the date of grant and an option’s maximum term is 10 years. The volatility assumption was based on a benchmark study of our peers prior to 2014. Starting with the options granted in 2014, the volatility was based on the Company’s historic volatility.

The Company has not granted stock options since the year ended December 31, 2014. As of March 31, 2020, there was no unrecognized compensation cost related to stock options and the range of exercise prices on outstanding stock options was $33.73 - $42.16.

The following table summarizes the Company’s stock option activity:

		Weighted-Average
	Number of Options	Exercise Price		Remaining Contractual Life (in years)	Intrinsic Value (in millions)
Outstanding, December 31, 2019	414,800	$	37.79	3.06	$	11
Exercised	(9,675)	33.95
Outstanding, March 31, 2020	405,125	$	37.88	2.89	$	1
Exercisable, March 31, 2020	405,125	$	37.88	2.89	$	1

Restricted Stock Awards and Restricted Stock Units

The Company has granted restricted stock awards and restricted stock units (collectively referred to as “RSUs”) under its stockholder approved stock plans. Compensation expense for RSUs is measured based on the closing market price of the stock at date of grant and is recognized on a straight-line basis over the vesting period, which is typically three or four years. The Stock Plan allows alternate vesting schedules for death, disability, and retirement. The weighted average grant date fair value of RSUs granted in 2020 was $63.65.

The following table summarizes the Company’s RSU plans:

	Number of RSUs	Weighted-Average Fair Value
Balance at December 31, 2019	1,515,706	$	51.70
Granted	382,270	63.71
Vested	(328,663)	57.74
Forfeited	(12,525)	63.33
Balance at March 31, 2020	1,556,788	$	53.24

As of March 31, 2020, there was $44 million of total unrecognized compensation cost related to restricted stock. That cost is expected to be recognized over a weighted-average period of 2.42 years. The total grant date fair value of shares vested during the three months ended March 31, 2020 and 2019 was $19 million and $18 million, respectively.

Performance Stock Awards and Performance Stock Units

The Company has granted performance stock awards and performance stock units (collectively referred to as “PSUs”) as a part of its long-term incentive plan. All outstanding performance grants will fully settle in stock. The amount of stock ultimately distributed from all performance shares is contingent on meeting internal company-based metrics or an external-based stock performance metric.

In the three months ended March 31, 2020, the Company granted both internal company-based and external-based metric PSUs.

Internal Company-based metrics

The internal company-based metrics are based on various Company metrics and typically vest over a three-year period. The amount of stock distributed will vary from 0% to 300% of PSUs awarded depending on each award's design and performance versus the internal Company-based metrics.

The initial fair value for all internal Company-based metric PSUs assumes that the performance goals will be achieved and is based on the grant date stock price. This assumption is monitored quarterly and if it becomes probable that such goals will not be achieved or will be exceeded, compensation expense recognized will be adjusted and previous surplus compensation expense recognized will be reversed or additional expense will be recognized. The expected term represents the period from the grant date to the end of the vesting period. Pro-rata vesting may be utilized in the case of death, disability or approved retirement and awards, if earned, will be paid at the end of the vesting period.

External-based metrics

The external-based metrics vest after a three-year period. Outstanding grants issued in or after 2018 are based on the Company's total stockholder return relative to the performance of the Dow Jones U.S. Construction & Materials Index. The amount of stock distributed will vary from 0% to 200% of PSUs awarded depending on the relative stockholder return performance. The fair value of external-based metric PSUs has been estimated at the grant date using a Monte Carlo simulation that uses various assumptions.

The following table provides a summary of these assumptions for shares granted in 2020:

Expected volatility	28.43		%
Risk free interest rate	1.43		%
Expected term (in years)	2.90
Grant date fair value of units granted	$	68.60

The risk-free interest rate was based on zero coupon United States Treasury bills at the grant date. The expected term represents the period from the grant date to the end of the three-year performance period.

PSU Summary

As of March 31, 2020, there was $17 million total unrecognized compensation cost related to PSUs. That cost is expected to be recognized over a weighted-average period of 2.16 years. The total grant date fair value of shares vested during the three months ended March 31, 2020 was $1 million.

The following table summarizes the Company’s PSU activity:

	Number of PSUs	Weighted-Average Grant-Date Fair Value
Balance at December 31, 2019	312,725	$	69.23
Granted	154,078	64.28
Vested	(9,558)	84.59
Forfeited	(1,240)	73.16
Balance at March 31, 2020	456,005	$	69.94

Employee Stock Purchase Plan

The Owens Corning Employee Stock Purchase Plan (ESPP) is a tax-qualified plan under Section 423 of the Internal Revenue Code. The purchase price of shares purchased under the ESPP is equal to 85% of the lower of the fair market value of shares of Owens Corning common stock at the beginning or ending of the offering period, which is a six-month period ending on May 31 and November 30 of each year. At the approval date, 2.0 million shares were available for purchase under the ESPP. As of March 31, 2020, 0.3 million shares remain available for purchase. On April 16, 2020, the Company's stockholders approved the Amended and Restated Owens Corning Employee Stock Purchase Plan which increased the number of shares available for issuance under the plan by 4.2 million shares.

During the three months ended March 31, 2020 and 2019, the Company recognized expense of $1 million related to the Company's ESPP. As of March 31, 2020, there was $1 million of total unrecognized compensation cost related to the ESPP.

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RESTRUCTURING AND ACQUISITION-RELATED COSTS

3 Months Ended

Mar. 31, 2020

Restructuring and Related Activities [Abstract]

RESTRUCTURING AND ACQUISITION-RELATED COSTS

RESTRUCTURING AND ACQUISITION-RELATED COSTS

The Company may incur restructuring, transaction and integration costs related to acquisitions, and may incur restructuring costs in connection with its global cost reduction and productivity initiatives.

Restructuring Costs

Insulation Network Optimization Restructuring

In October 2019, the Company took actions to primarily restructure certain U.S. insulation operations and to reduce the cost structure throughout the Insulation network. Investments in productivity and process technologies enabled the Company to optimize its network and improve its cost position. During the first three months of 2020, the Company recorded $5 million of charges. The Company expects to recognize approximately $2 million of incremental charges throughout 2020.

Acquisition-Related Restructuring

Following the acquisitions of Paroc Group Oy ("Paroc") and Pittsburgh Corning Corporation and Pittsburgh Corning Europe NV (collectively, "Pittsburgh Corning") into the Company's Insulation segment, the Company took actions to realize expected synergies from the newly acquired operations. The Company does not expect to recognize significant incremental costs related to these actions.

Consolidated Statements of Earnings (Loss) Classification

The following table presents the impact and respective location of total restructuring costs on the Consolidated Statements of Earnings (Loss), which are included within Corporate, Other and Eliminations (in millions):

		Three Months Ended March 31,
Type of cost	Location	2020		2019
Accelerated depreciation	Cost of sales	$	1	$	—
Other exit costs	Cost of sales	2		1
Severance	Other expenses, net	2		—
Other exit costs (gains)	Other expenses, net	—		(3)
Total restructuring costs (gains)		$	5	$	(2)

Summary of Unpaid Liabilities

The following table summarizes the status of the unpaid liabilities from the Company's restructuring activities (in millions):

	Insulation Network Optimization Restructuring		Acquisition-Related Restructuring
Balance at December 31, 2019	$	5	$	11
Restructuring costs	5		—
Payments	(5)		(2)
Non-cash items and reclassifications to other accounts	(2)		1
Balance at March 31, 2020	$	3	$	10
Cumulative charges incurred	$	29	$	29

As of March 31, 2020, the remaining liability balance is comprised of $13 million of severance, inclusive of $1 million of non-current severance and $12 million of severance the Company expects to pay over the next twelve months.

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SEGMENT INFORMATION (Tables)

3 Months Ended

Mar. 31, 2020

Segment Reporting [Abstract]

Reconciliation of Revenue from Segments to Consolidated

The following table summarizes our Net sales by segment and geographic region (in millions). Corporate eliminations (shown below) largely reflect intercompany sales from Composites to Roofing. External customer sales are attributed to geographic region based upon the location from which the product is sold to the external customer.

	Three Months Ended March 31,
	2020		2019
Reportable Segments
Composites	$	494	$	513
Insulation	603		591
Roofing	555		614
Total reportable segments	1,652		1,718
Corporate eliminations	(51)		(51)
NET SALES	$	1,601	$	1,667

Schedule of Revenues by Geographical Areas

External Customer Sales by Geographic Region
United States	$	1,060	$	1,100
Europe	287		296
Asia-Pacific	128		149
Rest of world	126		122
NET SALES	$	1,601	$	1,667

Schedule of Earnings before Interest and Taxes

The following table summarizes EBIT by segment (in millions):

	Three Months Ended March 31,
	2020		2019
Reportable Segments
Composites	$	44	$	57
Insulation	39		15
Roofing	64		74
Total reportable segments	147		146
Restructuring (costs) / gains	(5)		2
Gains on sales of certain precious metals	10		—
Goodwill impairment charge	(944)		—
Intangible asset impairment charges	(43)		—
General corporate expense and other	(31)		(30)
Total corporate, other and eliminations	(1,013)		(28)
EBIT	$	(866)	$	118

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CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables)

3 Months Ended

Mar. 31, 2020

Equity [Abstract]

Components of Accumulated Other Comprehensive Income (Loss)

The following table summarizes the changes in accumulated other comprehensive income (deficit) (in millions):

	Three Months Ended March 31,
	2020		2019
Currency Translation Adjustment
Beginning balance	$	(282)	$	(306)
Net investment hedge amounts classified into AOCI, net of tax	32		10
(Loss)/gain on foreign currency translation	(154)		1
Other comprehensive (loss)/income, net of tax	(122)		11
Ending balance	$	(404)	$	(295)
Pension and Other Postretirement Adjustment
Beginning balance	$	(326)	$	(350)
Amounts reclassified from AOCI to net earnings, net of tax (a)	7		1
Amounts classified into AOCI, net of tax	—		(2)
Other comprehensive income/(loss), net of tax	7		(1)
Ending balance	$	(319)	$	(351)
Hedging Adjustment
Beginning balance	$	(2)	$	—
Amounts classified into AOCI, net of tax	(3)		(1)
Amounts reclassified from AOCI to net earnings, net of tax (b)	2		—
Other comprehensive loss, net of tax	(1)		(1)
Ending balance	$	(3)	$	(1)
Total AOCI ending balance	$	(726)	$	(647)

(a)These AOCI components are included in the computation of total Pension and Other postretirement expense and are recorded in Non-operating income. See Note 11 for additional information.

(b)Amounts reclassified from (loss)/gain on cash flow hedges are reclassified from AOCI to income when the hedged item affects earnings and is recognized in Cost of sales or Interest expense, net depending on the hedged item. See Note 5 for additional information.

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REVENUE - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Contract liability	$ 63	$ 60
Contract liability, revenue recognized	$ 12

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DERIVATIVE FINANCIAL INSTRUMENTS DERIVATIVE FINANCIAL INSTRUMENTS CASH FLOW (Details) MMBTU in Millions, $ in Millions	Mar. 31, 2020 USD ($) MMBTU
Derivative [Line Items]
Derivative, nonmonetary notional amount | MMBTU	7
Treasury interest rate lock
Derivative [Line Items]
Derivative, notional amount	$ 175
Derivative, fixed interest rate	0.994%
United States of America, Dollars | Cross Currency Interest Rate Contract
Derivative [Line Items]
Derivative, notional amount	$ 516
Euro Member Countries, Euro | Foreign exchange forward contracts
Derivative [Line Items]
Derivative, notional amount	69
U.S. | Foreign exchange forward contracts
Derivative [Line Items]
Derivative, notional amount	$ 711

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INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income tax expense	$ 24	$ 39
Effective tax rate	(3.00%)	48.00%
Increase in tax expense		$ 12
Valuation allowance	$ 18

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STOCK COMPENSATION - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of options, beginning balance	414,800
Exercised (in shares)	(9,675)
Number of options, ending balance	405,125
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Beginning Balance	$ 37.79
Exercised, weighted average exercise price	33.95
Ending Balance	$ 37.88
Weighted average remaining contractual term (in years)	2 years 10 months 20 days	3 years 21 days
Exercise price range, exercisable options, weighted average remaining contractual term (in years)	2 years 10 months 20 days
Intrinsic value	$ 1		$ 11
Intrinsic value, exercisable	$ 1

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GENERAL (Policies)	3 Months Ended
	Mar. 31, 2020
Accounting Changes and Error Corrections [Abstract]
Accounts Receivable	Accounts ReceivableTrade accounts receivable are recorded at the invoiced amount and do not bear interest. Consistent with the requirements of ASU 2016-13, "Financial Instruments - Credit Losses (Topic 236)," the allowance for doubtful accounts is based on the Company’s assessment of the collectibility of customer accounts. The Company regularly reviews the allowance by considering factors such as historical experience, credit quality, the age of the accounts receivable balances, and current economic conditions that may affect a customer’s ability to pay. Account balances are charged off against the allowance when the Company believes it is probable the receivable will not be recovered.

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CONTINGENT LIABILITIES AND OTHER MATTERS

3 Months Ended

Mar. 31, 2020

Commitments and Contingencies Disclosure [Abstract]

CONTINGENT LIABILITIES AND OTHER MATTERS

CONTINGENT LIABILITIES AND OTHER MATTERS

The Company may be involved in various legal and regulatory proceedings relating to employment, antitrust, tax, product liability, environmental and other matters (collectively, “Proceedings”). The Company regularly reviews the status of such Proceedings along with legal counsel. Liabilities for such Proceedings are recorded when it is probable that the liability has been incurred and when the amount of the liability can be reasonably estimated. Liabilities are adjusted when additional information becomes available. Management believes that the amount of any reasonably possible losses in excess of any amounts accrued, if any, with respect to such Proceedings or any other known claim, including the matters described below under the caption Environmental Matters (the “Environmental Matters”), are not material to the Company’s financial statements. Management believes that the ultimate disposition of the Proceedings and the Environmental Matters will not have a material adverse effect on the Company’s financial condition. While the likelihood is remote, the disposition of the Proceedings and Environmental Matters could have a material impact on the results of operations, cash flows or liquidity in any given reporting period.

Litigation and Regulatory Proceedings

The Company is involved in litigation and regulatory proceedings from time to time in the regular course of its business. The Company believes that adequate provisions for resolution of all contingencies, claims and pending matters have been made for probable losses that are reasonably estimable.

Environmental Matters

The Company has established policies and procedures designed to ensure that its operations are conducted in compliance with all relevant laws and regulations and that enable the Company to meet its high standards for corporate sustainability and environmental stewardship. Our manufacturing facilities are subject to numerous foreign, federal, state and local laws and regulations relating to the presence of hazardous materials, pollution and protection of the environment, including emissions to air, reductions of greenhouse gases, discharges to water, management of hazardous materials, handling and disposal of solid wastes, and remediation of contaminated sites. All Company manufacturing facilities operate using an ISO 14001 or equivalent environmental management system. The Company’s 2030 Sustainability Goals include significant global reductions in energy use, water consumption, waste to landfill, and emissions of greenhouse gases, fine particulate matter, volatile organic air emissions, and biodiversity.

Owens Corning is involved in remedial response activities and is responsible for environmental remediation at a number of sites, including certain of its currently owned or formerly owned plants. These responsibilities arise under a number of laws, including, but not limited to, the Federal Resource Conservation and Recovery Act, and similar state or local laws pertaining to the management and remediation of hazardous materials and petroleum. The Company has also been named a potentially responsible party under the U.S. Federal Superfund law, or state equivalents, at a number of disposal sites. The Company became involved in these sites as a result of government action or in connection with business acquisitions. As of March 31, 2020, the Company was involved with a total of 20 sites worldwide, including 7 Superfund and state equivalent sites and 13 owned or formerly owned sites. None of the liabilities for these sites are individually significant to the Company.

Remediation activities generally involve a potential range of activities and costs related to soil, groundwater, and sediment contamination. This can include pre-cleanup activities such as fact-finding and investigation, risk assessment, feasibility studies, remedial action design and implementation (where actions may range from monitoring to removal of contaminants, to installation of longer-term remediation systems). A number of factors affect the cost of environmental remediation, including the number of parties involved in a particular site, the determination of the extent of contamination, the length of time the remediation may require, the complexity of environmental regulations, variability in clean-up standards, the need for legal action, and changes in remediation technology. Taking these factors into account, Owens Corning has predicted the costs of remediation reasonably estimated to be paid over a period of years. The Company accrues an amount on an undiscounted basis, consistent with the reasonable estimates of these costs when it is probable that a liability has been incurred. Actual cost may differ from these estimates for the reasons mentioned above. At March 31, 2020, the Company had an accrual totaling $9 million for these costs, of which the current portion is $5 million. Changes in required remediation procedures or timing of

those procedures, or discovery of contamination at additional sites, could result in material increases to the Company’s environmental obligations.

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WARRANTIES

3 Months Ended

Mar. 31, 2020

Product Warranties Disclosures [Abstract]

WARRANTIES

WARRANTIES

The Company records a liability for warranty obligations at the date the related products are sold. Adjustments are made as new information becomes available. Please refer to Note 1 of our 2019 Form 10-K for information about our separately-priced extended warranty contracts. A reconciliation of the warranty liability is as follows (in millions):

	Three Months Ended March 31,
	2020		2019
Beginning balance	$	64	$	60
Amounts accrued for current year	4		4
Settlements of warranty claims	(3)		(3)
Ending balance	$	65	$	61

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INVENTORIES

3 Months Ended

Mar. 31, 2020

Inventory Disclosure [Abstract]

INVENTORIES

INVENTORIES

Inventories consist of the following (in millions):

	March 31, 2020		December 31, 2019
Finished goods	$	725	$	715
Materials and supplies	337		318
Total inventories	$	1,062	$	1,033

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CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Total AOCI beginning balance	$ (610)
Amounts classified into AOCI, net of tax	0	$ 0
Amounts classified into AOCI, net of tax	(1)	(1)
Total AOCI ending balance	(726)	(647)
Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Total AOCI beginning balance	(282)	(306)
Net investment hedge amounts classified into AOCI, net of tax	32	10
(Loss)/gain on foreign currency translation	(154)	1
Other comprehensive (loss)/income, net of tax	(122)	11
Total AOCI ending balance	(404)	(295)
Pension and Other Postretirement Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Total AOCI beginning balance	(326)	(350)
Other comprehensive (loss)/income, net of tax	7	(1)
Amounts reclassified from AOCI to net earnings, net of tax	7	1
Amounts classified into AOCI, net of tax	0	(2)
Total AOCI ending balance	(319)	(351)
Hedging Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Total AOCI beginning balance	(2)	0
Other comprehensive (loss)/income, net of tax	(1)	(1)
Amounts classified into AOCI, net of tax	(3)	(1)
Amounts classified into AOCI, net of tax	2	0
Total AOCI ending balance	$ (3)	$ (1)

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INVENTORIES (Tables)

3 Months Ended

Mar. 31, 2020

Inventory Disclosure [Abstract]

Schedule of Inventory, Current

Inventories consist of the following (in millions):

	March 31, 2020		December 31, 2019
Finished goods	$	725	$	715
Materials and supplies	337		318
Total inventories	$	1,062	$	1,033

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WARRANTIES (Tables)

3 Months Ended

Mar. 31, 2020

Product Warranties Disclosures [Abstract]

Schedule of Product Warranty Liability

The Company records a liability for warranty obligations at the date the related products are sold. Adjustments are made as new information becomes available. Please refer to Note 1 of our 2019 Form 10-K for information about our separately-priced extended warranty contracts. A reconciliation of the warranty liability is as follows (in millions):

	Three Months Ended March 31,
	2020		2019
Beginning balance	$	64	$	60
Amounts accrued for current year	4		4
Settlements of warranty claims	(3)		(3)
Ending balance	$	65	$	61

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EARNINGS PER SHARE (Tables)

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following table is a reconciliation of weighted-average shares for calculating basic and diluted earnings (loss) per-share (in millions, except per share amounts):

	Three Months Ended March 31,
	2020		2019
Net earnings (loss) attributable to Owens Corning	$	(917)	$	44
Weighted-average number of shares outstanding used for basic earnings per share	108.8		109.5
Non-vested restricted and performance shares	—		0.4
Options to purchase common stock	—		0.2
Weighted-average number of shares outstanding and common equivalent shares used for diluted earnings (loss) per share	108.8		110.1
Earnings (loss) per common share attributable to Owens Corning common stockholders:
Basic	$	(8.43)	$	0.40
Diluted	$	(8.43)	$	0.40

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PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Tables)

3 Months Ended

Mar. 31, 2020

Pension Plan

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Net Benefit Costs

The following tables provide information regarding pension expense recognized (in millions):

	Three Months Ended March 31,
	2020						2019
	U.S.		Non-U.S.		Total		U.S.		Non-U.S.		Total
Components of Net Periodic Pension Cost
Service cost	$	1	$	1	$	2	$	1	$	1	$	2
Interest cost	7		2		9		9		3		12
Expected return on plan assets	(11)		(4)		(15)		(13)		(4)		(17)
Amortization of actuarial loss	3		1		4		3		1		4
Net periodic pension cost	$	—	$	—	$	—	$	—	$	1	$	1

Other Postretirement Benefits Plan

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Net Benefit Costs

The following table provides the components of net periodic benefit cost for aggregated U.S. and non-U.S. plans for the periods indicated (in millions):

	Three Months Ended March 31,
	2020		2019
Components of Net Periodic Benefit Cost
Service cost	$	—	$	—
Interest cost	2		2
Amortization of prior service credit	(1)		(1)
Amortization of actuarial gain	(2)		(2)
Net periodic benefit income	$	(1)	$	(1)

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DEBT - Credit Facility Utilization (Details) - USD ($) $ in Millions	Mar. 31, 2020	Jun. 30, 2016
Debt Instrument [Line Items]
Facility size or borrowing limit		$ 800
Senior Revolving Credit Facility B
Debt Instrument [Line Items]
Facility size or borrowing limit	$ 800
Outstanding borrowings	400
Outstanding letters of credit	4
Availability on facility	396
Letter Of Credit Under Receivables Purchase Agreement
Debt Instrument [Line Items]
Facility size or borrowing limit	280
Collateral capacity limitation on availability	0
Outstanding borrowings	0
Outstanding letters of credit	2
Availability on facility	$ 278

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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions		Mar. 31, 2020	Dec. 31, 2019
CURRENT ASSETS
Cash and cash equivalents		$ 234	$ 172
Receivables, less allowances of $9 at March 31, 2020 and $11 at December 31, 2019		931	770
Inventories		1,062	1,033
Other current assets		105	86
Total current assets		2,332	2,061
Property, plant and equipment, net		3,747	3,855
Operating lease right-of-use assets		190	203
Goodwill		959	1,932
Intangible assets		1,655	1,721
Deferred income taxes		31	46
Other non-current assets		237	188
TOTAL ASSETS		9,151	10,006
LIABILITIES AND EQUITY
Current liabilities		1,430	1,329
Long-term debt, net of current portion		3,213	2,986
Pension plan liability		210	231
Other employee benefits liability		174	179
Non-current operating lease liabilities		129	138
Deferred income taxes		274	272
Other liabilities		195	200
OWENS CORNING STOCKHOLDERS’ EQUITY
Preferred stock, par value $0.01 per share	[1]	0	0
Common stock, par value $0.01 per share	[2]	1	1
Additional paid in capital		4,046	4,051
Accumulated earnings		1,376	2,319
Accumulated other comprehensive deficit		(726)	(610)
Cost of common stock in treasury	[3]	(1,210)	(1,130)
Total Owens Corning stockholders’ equity		3,487	4,631
Noncontrolling interests		39	40
Total equity		3,526	4,671
TOTAL LIABILITIES AND EQUITY		$ 9,151	$ 10,006

[1] 10 shares authorized; none issued or outstanding at March 31, 2020 and December 31, 2019

[2] 400 shares authorized; 135.5 issued and 107.8 outstanding at March 31, 2020; 135.5 issued and 109.0 outstanding at December 31, 2019

[3] shares at March 31, 2020 and 26.5 shares at December 31, 2019

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PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Property Plant And Equipment [Line Items]
Property plant and equipment, gross	$ 6,591	$ 6,695
Accumulated depreciation	(2,844)	(2,840)
Property, plant and equipment, net	$ 3,747	$ 3,855
Precious metals depletion percentage	10.00%	10.00%
Precious metal percent of deprecation expense	0.03
Land
Property Plant And Equipment [Line Items]
Property plant and equipment, gross	$ 215	$ 221
Buildings and leasehold improvements
Property Plant And Equipment [Line Items]
Property plant and equipment, gross	1,174	1,186
Machinery and equipment
Property Plant And Equipment [Line Items]
Property plant and equipment, gross	4,984	4,978
Construction in progress
Property Plant And Equipment [Line Items]
Property plant and equipment, gross	$ 218	$ 310

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GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) site	Dec. 31, 2019 USD ($)
Finite-Lived Intangible Assets [Line Items]
Non-cash impairment charge	$ 944
Number of intangible assets impaired | site	2
Net carrying amount	$ 1,655	$ 1,721
Other
Finite-Lived Intangible Assets [Line Items]
Non-cash impairment charge	$ 43
Weighted average useful life	45 years
Net carrying amount	$ 35	32
Trademarks
Finite-Lived Intangible Assets [Line Items]
Net carrying amount	1,093	$ 1,139
Trademarks and Trade Name
Finite-Lived Intangible Assets [Line Items]
Net carrying amount	248
Insulation | Trade name
Finite-Lived Intangible Assets [Line Items]
Non-cash impairment charge	34
Insulation | Trademarks
Finite-Lived Intangible Assets [Line Items]
Non-cash impairment charge	$ 9

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STOCK COMPENSATION - Performance Stock Units (Details) - Performance Stock Units (PSUs)	3 Months Ended
	Mar. 31, 2020 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Balance at December 31, 2019 | shares	312,725
Granted (in shares) | shares	154,078
Vested (in shares) | shares	(9,558)
Forfeited (in shares) | shares	(1,240)
Balance at March 31, 2020 | shares	456,005
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Balance at December 31, 2019 | $ / shares	$ 69.23
Granted, weighted average grant date fair value | $ / shares	64.28
Vested, weighted average grant date fair value | $ / shares	84.59
Forfeited, weighted average grant date fair value | $ / shares	73.16
Balance at March 31, 2020 | $ / shares	$ 69.94

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CONTINGENT LIABILITIES AND OTHER MATTERS (Details) $ in Millions	Mar. 31, 2020 USD ($) site
Unusual or Infrequent Item, or Both [Line Items]
Environmental liability sites	20
Environmental exit costs, accrual | $	$ 9
Environmental exit costs, accrual, current | $	$ 5
Superfund Site
Unusual or Infrequent Item, or Both [Line Items]
Environmental liability sites	7
Owned or Formally Owned Sites
Unusual or Infrequent Item, or Both [Line Items]
Environmental liability sites	13

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SEGMENT INFORMATION (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) segment	Mar. 31, 2019 USD ($)
Segment Reporting, Significant Reconciling Item [Line Items]
Number of reportable segments | segment	3
NET SALES	$ 1,601	$ 1,667
EBIT	(866)	118
Restructuring (costs) / gains	(5)	2
Gains on sales of certain precious metals	10	0
Goodwill impairment charge	944	0
Intangible asset impairment charges	43	0
General corporate expense and other	(31)	(30)
Decrease in assets	(987)
U.S.
Segment Reporting, Significant Reconciling Item [Line Items]
NET SALES	1,060	1,100
Europe
Segment Reporting, Significant Reconciling Item [Line Items]
NET SALES	287	296
Asia Pacific
Segment Reporting, Significant Reconciling Item [Line Items]
NET SALES	128	149
Other Geographical
Segment Reporting, Significant Reconciling Item [Line Items]
NET SALES	126	122
Composites
Segment Reporting, Significant Reconciling Item [Line Items]
NET SALES	494	513
EBIT	44	57
Insulation
Segment Reporting, Significant Reconciling Item [Line Items]
NET SALES	603	591
EBIT	39	15
Goodwill impairment charge	944
Roofing
Segment Reporting, Significant Reconciling Item [Line Items]
NET SALES	555	614
EBIT	64	74
Total Segments
Segment Reporting, Significant Reconciling Item [Line Items]
NET SALES	1,652	1,718
EBIT	147	146
Corporate Eliminations
Segment Reporting, Significant Reconciling Item [Line Items]
NET SALES	(51)	(51)
EBIT	$ (1,013)	$ (28)

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DERIVATIVE FINANCIAL INSTRUMENTS BALANCE SHEET (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Other current assets | Designated as Hedging Instrument | Net Investment Hedging | Cross Currency Interest Rate Contract
Derivatives, Fair Value [Line Items]
Derivative asset, fair value	$ 13	$ 12
Other current assets | Nondesignated as Hedging Instrument | Foreign Exchange Contract
Derivatives, Fair Value [Line Items]
Derivative asset, fair value	12	9
Other non-current assets | Designated as Hedging Instrument | Net Investment Hedging | Cross Currency Interest Rate Contract
Derivatives, Fair Value [Line Items]
Derivative asset, fair value	38	1
Other liabilities | Designated as Hedging Instrument | Net Investment Hedging | Cross Currency Interest Rate Contract
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	0	4
Other liabilities | Designated as Hedging Instrument | Cash Flow Hedging | Treasury interest rate lock
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	1	0
Current liabilities | Designated as Hedging Instrument | Cash Flow Hedging | Energy Related Derivative
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	3	3
Current liabilities | Nondesignated as Hedging Instrument | Foreign Exchange Contract
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	$ 6	$ 1

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EARNINGS PER SHARE

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

EARNINGS PER SHARE

EARNINGS PER SHARE

The following table is a reconciliation of weighted-average shares for calculating basic and diluted earnings (loss) per-share (in millions, except per share amounts):

	Three Months Ended March 31,
	2020		2019
Net earnings (loss) attributable to Owens Corning	$	(917)	$	44
Weighted-average number of shares outstanding used for basic earnings per share	108.8		109.5
Non-vested restricted and performance shares	—		0.4
Options to purchase common stock	—		0.2
Weighted-average number of shares outstanding and common equivalent shares used for diluted earnings (loss) per share	108.8		110.1
Earnings (loss) per common share attributable to Owens Corning common stockholders:
Basic	$	(8.43)	$	0.40
Diluted	$	(8.43)	$	0.40

For the three months ended March 31, 2020, diluted earnings per share was equal to basic earnings per share due to the net loss attributable to Owens Corning. For the three months ended March 31, 2019, the number of shares used in the calculation of diluted earnings per share did not include 0.7 million non-vested restricted shares and 0.1 million non-vested performance shares, due to their anti-dilutive effect.

On October 24, 2016, the Board of Directors approved a share buy-back program under which the Company is authorized to repurchase up to 10 million shares of the Company’s outstanding common stock (the “Repurchase Authorization”). The Repurchase Authorization enables the Company to repurchase shares through the open market, privately negotiated, or other transactions. The actual number of shares repurchased will depend on timing, market conditions and other factors and is at the Company’s discretion. The Company repurchased 1.3 million shares of its common stock for $81 million during the three months ended March 31, 2020, under the Repurchase Authorization. As of March 31, 2020, 2.3 million shares remain available for repurchase under the Repurchase Authorization.

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DEBT

3 Months Ended

Mar. 31, 2020

Debt Disclosure [Abstract]

DEBT

DEBT

Details of the Company’s outstanding long-term debt, as well as the fair values, are as follows (in millions):

	March 31, 2020				December 31, 2019
	Carrying Value		Fair Value		Carrying Value		Fair Value
4.20% senior notes, net of discount and financing fees, due 2022	$	184	104	%	$	183	104	%
4.20% senior notes, net of discount and financing fees, due 2024	395		105	%	395		106	%
3.40% senior notes, net of discount and financing fees, due 2026	397		96	%	396		101	%
3.95% senior notes, net of discount and financing fees, due 2029	445		96	%	445		104	%
7.00% senior notes, net of discount and financing fees, due 2036	367		127	%	367		126	%
4.30% senior notes, net of discount and financing fees, due 2047	588		82	%	588		95	%
4.40% senior notes, net of discount and financing fees, due 2048	390		93	%	390		97	%
Senior revolving credit facility, maturing in 2024 (a)	400		n/a		—		n/a
Various finance leases, due through 2032 (a)	56		100	%	26		100	%
Term loan borrowing, maturing in 2021 (a)	150		100	%	200		100	%
Other	2		n/a		3		n/a
Total long-term debt	3,374		n/a		2,993		n/a
Less – current portion (a)	161		100	%	7		100	%
Long-term debt, net of current portion	$	3,213	n/a		$	2,986	n/a

(a) The Company determined that the book value of the above noted long-term debt instruments approximates fair value.

The fair values of the Company's outstanding long-term debt instruments were estimated using market observable inputs, including quoted prices in active markets, market indices and interest rate measurements. Within the hierarchy of fair value measurements, these are Level 2 fair values.

Senior Notes

The Company issued $450 million of 2029 senior notes on August 12, 2019. Interest on the notes is payable semiannually in arrears on February 15 and August 15 each year, beginning on February 15, 2020. The proceeds from these notes were used to repay $416 million of our 2022 senior notes and $34 million of our 2036 senior notes.

The Company issued $400 million of 2048 senior notes on January 25, 2018. Interest on the notes is payable semiannually in arrears on January 30 and July 30 each year, beginning on July 30, 2018. The proceeds from these notes were used, along with borrowings on a $600 million term loan commitment and borrowings on the Receivables Securitization Facility (as defined below), to fund the purchase of Paroc in the first quarter of 2018.

The Company issued $600 million of 2047 senior notes on June 26, 2017. Interest on the notes is payable semiannually in arrears on January 15 and July 15 each year, beginning on January 15, 2018. A portion of the proceeds from these notes was used to fund the purchase of Pittsburgh Corning in 2017 and for general corporate purposes. The remaining proceeds were used to repay $144 million of our 2019 senior notes and $140 million of our 2036 senior notes.

The Company issued $400 million of 2026 senior notes on August 8, 2016. Interest on the notes is payable semiannually in arrears on February 15 and August 15 each year, beginning on February 15, 2017. A portion of the proceeds from these notes was used to repay $158 million of our 2016 senior notes. The remaining proceeds were used to pay down portions of our Receivables Securitization Facility and for general corporate purposes.

The Company issued $400 million of 2024 senior notes on November 12, 2014. Interest on the notes is payable semiannually in arrears on June 1 and December 1 each year, beginning on June 1, 2015. A portion of the proceeds from these notes was used to repay $242 million of our 2016 senior notes and $105 million of our 2019 senior notes. The remaining proceeds were used to pay down our Senior Revolving Credit Facility (as defined below), finance general working capital needs, and for general corporate purposes.

The Company issued $600 million of 2022 senior notes on October 17, 2012. Interest on the notes is payable semiannually in arrears on June 15 and December 15 each year, beginning on June 15, 2013. The proceeds of these notes were used to repay $250 million of our 2016 senior notes and $100 million of our 2019 senior notes and pay down our Senior Revolving Credit Facility.

On October 31, 2006, the Company issued $550 million of 2036 senior notes. The proceeds of these notes were used to pay certain unsecured and administrative claims, finance general working capital needs and for general corporate purposes.

Collectively, the senior notes above are referred to as the “Senior Notes.” The Senior Notes are general unsecured obligations of the Company and rank pari passu with all existing and future senior unsecured indebtedness of the Company.

The Company has the option to redeem all or part of the Senior Notes at any time at a “make-whole” redemption price. The Company is subject to certain covenants in connection with the issuance of the Senior Notes that it believes are usual and customary. The Company was in compliance with these covenants as of March 31, 2020.

Senior Revolving Credit Facility

The Company has an $800 million Senior Revolving Credit Facility with a maturity date in May 2024 that includes both borrowings and letters of credit. Borrowings under the Senior Revolving Credit Facility may be used for general corporate purposes and working capital. The Company has the discretion to borrow under multiple options, which provide for varying terms and interest rates including the United States prime rate, federal funds rate plus a spread or LIBOR plus a spread.

The Senior Revolving Credit Facility contains various covenants, including a maximum allowed leverage ratio and a minimum required interest expense coverage ratio, that the Company believes are usual and customary for a senior unsecured credit agreement. The Company was in compliance with these covenants as of March 31, 2020. Please refer to the Credit Facility Utilization paragraph below for liquidity information as of March 31, 2020.

Term Loan Borrowing

The Company obtained a term loan borrowing on October 27, 2017 for $600 million (the "Term Loan"). The Company entered into the Term Loan, in part, to pay a portion of the purchase price of the Paroc acquisition. In the first quarter of 2018, the Company borrowed on the Term Loan, along with borrowings on the Receivables Securitization Facility and the proceeds of the 2048 senior notes, to fund the purchase of Paroc. The Term Loan requires partial quarterly principal repayments, all of which have been paid as of March 31, 2020, and full repayment by February 2021. As of March 31, 2020, the Term Loan had $150 million outstanding.

The Term Loan contains various covenants, including a maximum allowed leverage ratio and a minimum required interest expense coverage ratio, that the Company believes are usual and customary for a term loan. The Company was in compliance with these covenants as of March 31, 2020.

Receivables Securitization Facility

Included in long-term debt on the Consolidated Balance Sheets are borrowings outstanding under a Receivables Purchase Agreement (RPA) that are accounted for as secured borrowings in accordance with ASC 860, "Accounting for Transfers and Servicing." Owens Corning Sales, LLC and Owens Corning Receivables LLC, each a subsidiary of the Company, have a $280 million RPA with certain financial institutions. The Company has the ability to borrow at the lenders' cost of funds, which approximates A-1/P-1 commercial paper rates vs. LIBOR, plus a fixed spread. The securitization facility (the "Receivables Securitization Facility") has been amended from time to time, with a maturity date in April 2022.

The Receivables Securitization Facility contains various covenants, including a maximum allowed leverage ratio and a minimum required interest expense coverage ratio that the Company believes are usual and customary for a securitization facility. The Company was in compliance with these covenants as of March 31, 2020. Please refer to the Credit Facility Utilization section below for liquidity information as of March 31, 2020.

Owens Corning Receivables LLC’s sole business consists of the purchase or acceptance through capital contributions of trade receivables and related rights from Owens Corning Sales, LLC and the subsequent retransfer of or granting of a security interest in such trade receivables and related rights to certain purchasers who are party to the RPA. Owens Corning Receivables LLC is a separate legal entity with its own separate creditors who will be entitled, upon its liquidation, to be satisfied out of Owens Corning Receivables LLC’s assets prior to any assets or value in Owens Corning Receivables LLC becoming available to Owens Corning Receivables LLC’s equity holders. The assets of Owens Corning Receivables LLC are not available to pay creditors of the Company or any other affiliates of the Company or Owens Corning Sales, LLC.

Credit Facility Utilization

The following table shows how the Company utilized its primary sources of liquidity (in millions):

	Balance at March 31, 2020
	Senior Revolving Credit Facility		Receivables Securitization Facility
Facility size or borrowing limit	$	800	$	280
Collateral capacity limitation on availability	n/a		—
Outstanding borrowings	400		—
Outstanding letters of credit	4		2
Availability on facility	$	396	$	278

Short-Term Debt

Short-term borrowings were $9 million and $20 million as of March 31, 2020 and December 31, 2019, respectively. The short-term borrowings for both periods consisted of various operating lines of credit and working capital facilities. Certain of these borrowings are collateralized by receivables, inventories or property. The borrowing facilities are typically for one-year renewable terms. The weighted average interest rate on all short-term borrowings was approximately 8.2% and 7.8% for March 31, 2020 and December 31, 2019, respectively.

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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

3 Months Ended

Mar. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The changes in the net carrying value of goodwill by segment are as follows (in millions):

	Composites		Insulation		Roofing		Total
Balance at December 31, 2019	$	57	$	1,479	$	396	$	1,932
Impairment charge	—		(944)		—		(944)
Divestiture	—		(4)		—		(4)
Foreign currency translation	(1)		(23)		(1)		(25)
Balance at March 31, 2020	$	56	$	508	$	395	$	959

Schedule of Finite-Lived Intangible Assets

The Other category below primarily includes franchise agreements and quarry and emissions rights. Other intangible assets consist of the following (in millions):

	March 31, 2020						December 31, 2019
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Trademarks	$	1,093	n/a		$	1,093	$	1,139	n/a		$	1,139
Customer relationships	539		$	(173)	366		550		$	(167)	383
Technology	318		(157)		161		319		(152)		167
Other	69		(34)		35		67		(35)		32
Total other intangible assets	$	2,019	$	(364)	$	1,655	$	2,075	$	(354)	$	1,721

Finite-lived Intangible Assets Amortization Expense

The estimated amortization expense for intangible assets for the next five years is as follows (in millions):

Period	Amortization
2021	$	48
2022	$	46
2023	$	44
2024	$	40
2025	$	38

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DEBT (Tables)

3 Months Ended

Mar. 31, 2020

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

Details of the Company’s outstanding long-term debt, as well as the fair values, are as follows (in millions):

	March 31, 2020				December 31, 2019
	Carrying Value		Fair Value		Carrying Value		Fair Value
4.20% senior notes, net of discount and financing fees, due 2022	$	184	104	%	$	183	104	%
4.20% senior notes, net of discount and financing fees, due 2024	395		105	%	395		106	%
3.40% senior notes, net of discount and financing fees, due 2026	397		96	%	396		101	%
3.95% senior notes, net of discount and financing fees, due 2029	445		96	%	445		104	%
7.00% senior notes, net of discount and financing fees, due 2036	367		127	%	367		126	%
4.30% senior notes, net of discount and financing fees, due 2047	588		82	%	588		95	%
4.40% senior notes, net of discount and financing fees, due 2048	390		93	%	390		97	%
Senior revolving credit facility, maturing in 2024 (a)	400		n/a		—		n/a
Various finance leases, due through 2032 (a)	56		100	%	26		100	%
Term loan borrowing, maturing in 2021 (a)	150		100	%	200		100	%
Other	2		n/a		3		n/a
Total long-term debt	3,374		n/a		2,993		n/a
Less – current portion (a)	161		100	%	7		100	%
Long-term debt, net of current portion	$	3,213	n/a		$	2,986	n/a

(a) The Company determined that the book value of the above noted long-term debt instruments approximates fair value.

Schedule of Line of Credit Facilities

The following table shows how the Company utilized its primary sources of liquidity (in millions):

	Balance at March 31, 2020
	Senior Revolving Credit Facility		Receivables Securitization Facility
Facility size or borrowing limit	$	800	$	280
Collateral capacity limitation on availability	n/a		—
Outstanding borrowings	400		—
Outstanding letters of credit	4		2
Availability on facility	$	396	$	278

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SEGMENT INFORMATION

3 Months Ended

Mar. 31, 2020

Segment Reporting [Abstract]

SEGMENT INFORMATION

SEGMENT INFORMATION

The Company has three reportable segments: Composites, Insulation and Roofing. Accounting policies for the segments are the same as those for the Company. The Company’s three reportable segments are defined as follows:

Composites – The Company manufactures, fabricates and sells glass reinforcements in the form of fiber. Glass reinforcement materials are also used downstream by the Composites segment to manufacture and sell glass fiber products in the form of fabrics, non-wovens and other specialized products.

Insulation – Within our Insulation segment, the Company manufactures and sells fiberglass insulation into residential, commercial, industrial and other markets for both thermal and acoustical applications. It also manufactures and sells glass fiber pipe insulation, flexible duct media, bonded and granulated mineral wool insulation, cellular glass insulation and foam insulation used in above- and below-grade construction applications.

Roofing – Within our Roofing segment, the Company manufactures and sells residential roofing shingles, oxidized asphalt materials, roofing components used in residential and commercial construction and specialty applications, and synthetic packaging materials.

NET SALES

The following table summarizes our Net sales by segment and geographic region (in millions). Corporate eliminations (shown below) largely reflect intercompany sales from Composites to Roofing. External customer sales are attributed to geographic region based upon the location from which the product is sold to the external customer.

	Three Months Ended March 31,
	2020		2019
Reportable Segments
Composites	$	494	$	513
Insulation	603		591
Roofing	555		614
Total reportable segments	1,652		1,718
Corporate eliminations	(51)		(51)
NET SALES	$	1,601	$	1,667

External Customer Sales by Geographic Region
United States	$	1,060	$	1,100
Europe	287		296
Asia-Pacific	128		149
Rest of world	126		122
NET SALES	$	1,601	$	1,667

EARNINGS BEFORE INTEREST AND TAXES

Earnings before interest and taxes (EBIT) by segment consist of net sales less related costs and expenses and are presented on a basis that is used internally for evaluating segment performance. Certain items, such as general corporate expenses or income and certain other expense or income items, are excluded from the internal evaluation of segment performance. Accordingly, these items are not reflected in EBIT for our reportable segments and are included within Corporate, Other and Eliminations.

The following table summarizes EBIT by segment (in millions):

	Three Months Ended March 31,
	2020		2019
Reportable Segments
Composites	$	44	$	57
Insulation	39		15
Roofing	64		74
Total reportable segments	147		146
Restructuring (costs) / gains	(5)		2
Gains on sales of certain precious metals	10		—
Goodwill impairment charge	(944)		—
Intangible asset impairment charges	(43)		—
General corporate expense and other	(31)		(30)
Total corporate, other and eliminations	(1,013)		(28)
EBIT	$	(866)	$	118

TOTAL ASSETS

Total assets for the Insulation segment decreased following $987 million of non-cash impairment charges for goodwill and intangible assets in the three months ended March 31, 2020. Please refer to Note 6, Goodwill and Other Intangible Assets, for information on these charges.

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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
NET CASH FLOW USED FOR OPERATING ACTIVITIES
NET EARNINGS (LOSS)	$ (916)	$ 44
Adjustments to reconcile net earnings (loss) to cash used for operating activities:
Depreciation and amortization	116	113
Deferred income taxes	21	29
Provision for pension and other employee benefits liabilities	(1)	0
Stock-based compensation expense	11	11
Goodwill impairment charge	944	0
Intangible asset impairment charges	43	0
Other non-cash	14	15
Changes in operating assets and liabilities	(265)	(346)
Pension fund contribution	(11)	(8)
Payments for other employee benefits liabilities	(4)	(6)
Other	(4)	(3)
Net cash flow used for operating activities	(52)	(151)
NET CASH FLOW USED FOR INVESTING ACTIVITIES
Cash paid for property, plant, and equipment	(92)	(98)
Purchase of Interwrap	15	0
Derivative settlements	16	0
Other	0	(3)
Net cash flow used for investing activities	(61)	(95)
NET CASH FLOW PROVIDED BY FINANCING ACTIVITIES
Proceeds from senior revolving credit and receivables securitization facilities	736	548
Payments on senior revolving credit and receivables securitization facilities	(336)	(182)
Net decrease in short-term debt	(11)	(13)
Dividends paid	(26)	(48)
Purchases of treasury stock	(96)	(61)
Other	(4)	(3)
Net cash flow provided by financing activities	213	241
Effect of exchange rate changes on cash	(38)	10
Net increase in cash, cash equivalents, and restricted cash	62	5
Cash, cash equivalents and restricted cash at beginning of period	179	85
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD	241	90
Term Loan
NET CASH FLOW PROVIDED BY FINANCING ACTIVITIES
Payments on senior revolving credit and receivables securitization facilities	$ (50)	$ 0

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GOODWILL AND OTHER INTANGIBLE ASSETS

3 Months Ended

Mar. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND OTHER INTANGIBLE ASSETS

GOODWILL AND OTHER INTANGIBLE ASSETS

Goodwill

The Company tests goodwill and indefinite-lived intangible assets for impairment during the fourth quarter of each year, or more frequently should circumstances change or events occur that would more likely than not reduce the fair value of a reporting unit below its carrying value. During the first quarter of 2020, the Company’s significant share price reduction during the ongoing COVID-19 pandemic was determined to be an indicator of impairment under ASC 350. The COVID-19 pandemic will likely have a negative impact on results for the remainder of 2020 and creates near-term uncertainty in our markets.

As of the most recent annual goodwill impairment testing date (October 1, 2019), testing indicated that the business enterprise value for the Insulation reporting unit exceeded its carrying value by approximately 10%. As described in our 2019 Form 10-K, there was uncertainty surrounding the macroeconomic factors impacting this reporting unit and a downturn in these factors or a change in the long-term revenue growth or profitability for this reporting unit could increase the likelihood of a future impairment.

In the first quarter of 2020, the Company performed its ongoing assessment to consider whether events or circumstances had occurred that could more likely than not reduce the fair value of a reporting unit below its carrying value. The valuation limitation from the Company’s recent share price decline, the narrow cushion on the Insulation reporting unit and the high level of near-term macroeconomic uncertainty caused the Company to perform an interim goodwill impairment test as of March 31, 2020 over the Insulation reporting unit. After evaluating and weighing all relevant events and circumstances, and considering the substantial excess fair values for the Roofing and Composites reporting units, we concluded that it is not more likely than not that the fair values of these reporting units were less than their carrying values. Consequently, we determined that it was not necessary to perform an interim impairment test for the Roofing and Composites reporting units.

Based on the results of this testing, the Company recorded a $944 million pre-tax non-cash impairment charge related to the Insulation reporting unit in the first quarter of 2020. This charge was recorded in Goodwill impairment charge on the Consolidated Statements of Earnings (Loss), and was included in the Corporate, Other and Eliminations reporting category. Consistent with the Company’s adoption of ASU 2017-04 in the first quarter of 2020, the impairment charge was equal to the excess of the Insulation reporting unit’s carrying value over its fair value. The overall enterprise fair value of the Company was limited by the recent decline in our share price. The reduction in fair value for the Insulation reporting unit, and corresponding impairment charge, was primarily driven by an increase in the discount rate arising from higher equity risk premiums that reflect significant uncertainty surrounding the effect from the COVID-19 pandemic and a decrease in the reporting unit's forecasted near-term cash flows.

As part of our quantitative testing process for goodwill of the Insulation reporting unit, we estimated fair values using a discounted cash flow analysis, a form of the income approach, from the perspective of a market participant. Significant assumptions used in the discounted cash flow approach are revenue growth rates and EBIT margins used in estimating discrete period cash flow forecasts of the reporting unit, the discount rate, and the long-term revenue growth rate and EBIT margins used in estimating the terminal business value. The terminal business value is determined by applying the long-term growth rate to the latest year for which a forecast exists.

The changes in the net carrying value of goodwill by segment are as follows (in millions):

	Composites		Insulation		Roofing		Total
Balance at December 31, 2019	$	57	$	1,479	$	396	$	1,932
Impairment charge	—		(944)		—		(944)
Divestiture	—		(4)		—		(4)
Foreign currency translation	(1)		(23)		(1)		(25)
Balance at March 31, 2020	$	56	$	508	$	395	$	959

The remaining balance of goodwill for the Insulation reporting unit continues to be at risk for future impairment. There continues to be uncertainty surrounding the macroeconomic factors impacting this reporting unit, and a sustained downturn, significantly extended recovery, or a change in the long-term revenue growth or profitability for this reporting unit could increase the likelihood of an additional future impairment. Additionally, changes in market participant assumptions such as an increased discount rate or further share price reductions could increase the likelihood of an additional future impairment.

Other Intangible Assets

The Company amortizes the cost of other intangible assets over their estimated useful lives which, individually, range up to 45 years. The Company's future cash flows are not materially impacted by its ability to extend or renew agreements related to its amortizable intangible assets.

We performed an interim impairment test of certain indefinite-lived trademarks and trade names used by our Insulation segment, based on the macroeconomic conditions that precipitated the interim goodwill impairment test described above.

Based on the results of this testing, the Company recorded pre-tax non-cash impairment charges totaling $43 million in the first quarter of 2020 related to two of the Insulation trademarks and trade names. These charges were recorded in Other expenses, net on the Consolidated Statements of Earnings (Loss), and were included in the Corporate, Other and Eliminations reporting category.

Fair values used in testing for potential impairment of our trademarks are calculated using the relief-from-royalty method by applying an estimated market value royalty rate to the forecasted revenues of the businesses that utilize those assets. The assumed cash flows from this calculation are discounted at a rate based on a market participant discount rate.

A pre-tax impairment charge of $34 million for a trade name used by our European building and technical insulation business was recognized due to the combined effect of lower expected sales following an immaterial divestiture in the first quarter of 2020, a decrease in the forecasted near-term cash flows, and a higher discount rate associated with the economic impact and uncertainty from the COVID-19 pandemic. A pre-tax impairment charge of $9 million related to a trademark used on global cellular glass insulation products was recorded due to a slightly lower sales outlook and a similarly higher discount rate associated with the economic impact and uncertainty from the COVID-19 pandemic.

There is uncertainty surrounding the revenue growth factors for these assets and a change in the long-term revenue growth rate or increase in the discount rate assumption could increase the likelihood of a future impairment. Following the recognition of the impairment losses, the two affected assets had an aggregate carrying value of $248 million as of March 31, 2020.

The Other category below primarily includes franchise agreements and quarry and emissions rights. Other intangible assets consist of the following (in millions):

	March 31, 2020						December 31, 2019
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Trademarks	$	1,093	n/a		$	1,093	$	1,139	n/a		$	1,139
Customer relationships	539		$	(173)	366		550		$	(167)	383
Technology	318		(157)		161		319		(152)		167
Other	69		(34)		35		67		(35)		32
Total other intangible assets	$	2,019	$	(364)	$	1,655	$	2,075	$	(354)	$	1,721

The estimated amortization expense for intangible assets for the next five years is as follows (in millions):

Period	Amortization
2021	$	48
2022	$	46
2023	$	44
2024	$	40
2025	$	38

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (LOSS) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
NET EARNINGS (LOSS)	$ (916)	$ 44
Currency translation adjustment (net of tax of $(10) and $(3) for the three months ended March 31, 2020 and 2019, respectively)	(122)	11
Pension and other postretirement adjustment (net of tax of $0 for both the three months ended March 31, 2020 and 2019, respectively)	7	(1)
Hedging adjustment (net of tax of $1 for both the three months ended March 31, 2020 and 2019, respectively)	(1)	(1)
COMPREHENSIVE EARNINGS (LOSS)	(1,032)	53
Comprehensive earnings attributable to noncontrolling interests	1	0
COMPREHENSIVE EARNINGS (LOSS) ATTRIBUTABLE TO OWENS CORNING	$ (1,033)	$ 53

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RESTRUCTURING AND ACQUISITION-RELATED COSTS RESTRUCTURING (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 5	$ (2)
Cost Reductions Actions 2017
Restructuring Cost and Reserve [Line Items]
Restructuring costs	5
Restructuring cost, expected cost	2
Restructuring reserve	3		$ 5
Payments	(5)
Non-cash items and reclassifications to other accounts	2
Cumulative charges incurred	29
Pittsburgh Corning Related Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring costs	0
Restructuring reserve	10		$ 11
Payments	(2)
Non-cash items and reclassifications to other accounts	(1)
Cumulative charges incurred	29
Accelerated Depreciation | Cost of sales
Restructuring Cost and Reserve [Line Items]
Restructuring costs	1	0
Additional Exit Costs | Cost of sales
Restructuring Cost and Reserve [Line Items]
Restructuring costs	2	1
Additional Exit Costs | Other Expense
Restructuring Cost and Reserve [Line Items]
Restructuring costs	0	(3)
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	13
Restructuring reserve, noncurrent	1
Restructuring reserve, current	12
Employee Severance | Other Expense
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 2	$ 0

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions		Total	Common Stock Outstanding	Treasury Stock	APIC		Accumulated Earnings	AOCI		NCI
Beginning balance at Dec. 31, 2018		$ 4,324.0	$ 1.0	$ (1,103.0)	$ 4,028.0	[1]	$ 2,013.0	$ (656.0)	[2]	$ 41.0	[3]
Beginning balance (in shares) at Dec. 31, 2018			109.5	26.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss) attributable to Owens Corning		44.0					44.0
Net earnings attributable to noncontrolling interests		0.0
Currency translation adjustment		10.0						11.0	[2]	(1.0)	[3]
Pension and other postretirement adjustment (net of tax)		(1.0)						(1.0)	[2]
Deferred loss on hedging transactions (net of tax)		(1.0)						(1.0)	[2]
Issuance of common stock under share-based payment plans, shares			0.4	(0.4)
Issuance of common stock under share-based payment plans		0.0		$ 14.0	(14.0)	[1]
Purchases of treasury stock (shares)			(1.3)	1.3
Purchases of treasury stock		(61.0)		$ (61.0)
Stock-based compensation expense		11.0			11.0	[1]
Dividends declared	[4]	(24.0)					(24.0)
Ending balance at Mar. 31, 2019		4,302.0	$ 1.0	$ (1,150.0)	4,025.0	[1]	2,033.0	(647.0)	[2]	40.0	[3]
Ending balance (in shares) at Mar. 31, 2019			108.6	26.9
Beginning balance at Dec. 31, 2019		4,671.0	$ 1.0	$ (1,130.0)	4,051.0		2,319.0	(610.0)		40.0
Beginning balance (in shares) at Dec. 31, 2019			109.0	26.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss) attributable to Owens Corning		(917.0)					(917.0)			0.0
Net earnings attributable to noncontrolling interests		1.0								1.0
Currency translation adjustment		(124.0)						(122.0)		(2.0)
Pension and other postretirement adjustment (net of tax)		7.0						7.0
Deferred loss on hedging transactions (net of tax)		(1.0)						(1.0)
Issuance of common stock under share-based payment plans, shares			0.4	(0.4)
Issuance of common stock under share-based payment plans		0.0		$ 16.0	(16.0)
Purchases of treasury stock (shares)			(1.6)	(1.6)
Purchases of treasury stock		(96.0)		$ (96.0)
Stock-based compensation expense		11.0			11.0
Dividends declared	[4]	(26.0)					(26.0)
Ending balance at Mar. 31, 2020		$ 3,526.0	$ 1.0	$ (1,210.0)	$ 4,046.0		$ 1,376.0	$ (726.0)		$ 39.0
Ending balance (in shares) at Mar. 31, 2020			107.8	27.7

[1] Additional Paid in Capital (APIC)

[2] Accumulated Other Comprehensive Earnings (Deficit) (“AOCI”)

[3] Noncontrolling Interest (“NCI”)

[4] Quarterly dividend declarations of $0.24 per share and $0.22 per share as of March 31, 2020 and March 31, 2019, respectively.

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GOODWILL AND OTHER INTANGIBLE ASSETS - INTANGIBLE ASSETS ROLLFORWARD (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 2,019	$ 2,075
Accumulated amortization	(364)	(354)
Net Carrying Amount	1,655	1,721
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,093	1,139
Net Carrying Amount	1,093	1,139
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	539	550
Accumulated amortization	(173)	(167)
Net Carrying Amount	366	383
Technology
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	318	319
Accumulated amortization	(157)	(152)
Net Carrying Amount	161	167
Other
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	69	67
Accumulated amortization	(34)	(35)
Net Carrying Amount	$ 35	$ 32

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DERIVATIVE FINANCIAL INSTRUMENTS (Tables)

3 Months Ended

Mar. 31, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Assets and Liabilities at Fair Value

The following table presents the fair value of derivatives and hedging instruments and the respective location on the Consolidated Balance Sheets (in millions):

		Fair Value at
	Location	March 31, 2020		December 31, 2019
Derivative assets designated as hedging instruments:
Net investment hedges:
Cross-currency swaps	Other current assets	$	13	$	12
Cross-currency swaps	Other non-current assets	$	38	$	1
Derivative liabilities designated as hedging instruments:
Net investment hedges:
Cross-currency swaps	Other liabilities	$	—	$	4
Cash flow hedges:
Natural gas forward swaps	Current liabilities	$	3	$	3
Treasury interest rate lock	Other liabilities	$	1	$	—
Derivative assets not designated as hedging instruments:
Foreign exchange forward contracts	Other current assets	$	12	$	9
Derivative liabilities not designated as hedging instruments:
Foreign exchange forward contracts	Current liabilities	$	6	$	1

Schedule of Fair Value Derivative Instruments Statements of Earnings Location

The following table presents the impact and respective location of derivative activities on the Consolidated Statements of Earnings (Loss) (in millions):

		Three Months Ended March 31,
	Location	2020		2019
Derivative activity designated as hedging instruments:
Natural gas cash flow hedges:
Amount of loss reclassified from AOCI (as defined below) into earnings	Cost of sales	$	2	$	—
Cross-currency swap net investment hedges:
Amount of gain recognized in earnings on derivative amounts excluded from effectiveness testing	Interest expense, net	$	(3)	$	(3)
Derivative activity not designated as hedging instruments:
Foreign currency:
Amount of gain recognized in earnings (a)	Other expenses, net	$	(12)	$	(19)

(a)Gains related to foreign currency derivatives were substantially offset by net revaluation impacts on foreign currency denominated balance sheet exposures, which were also recorded in Other expenses, net. Please refer to the "Other Derivatives" section below for additional detail.

Consolidated Statements of Comprehensive Earnings (Loss) Activity

The following table presents the impact of derivative activities on the Consolidated Statements of Comprehensive Earnings (Loss) (in millions):

		Amount of (Gain) Loss Recognized in Comprehensive Earnings (Loss)
		Three Months Ended March 31,
Hedging Type	Derivative Financial Instrument	2020		2019
Net investment hedge	Cross-currency swaps	$	(42)	$	(13)
Cash flow hedge	Natural gas forward swaps	$	—	$	2
Cash flow hedge	Treasury interest rate lock	$	1	$	—

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RESTRUCTURING AND ACQUISITION-RELATED COSTS (Tables)

3 Months Ended

Mar. 31, 2020

Restructuring and Related Activities [Abstract]

Schedule of Restructuring Costs on the Consolidated Statements of Earnings

Consolidated Statements of Earnings (Loss) Classification

The following table presents the impact and respective location of total restructuring costs on the Consolidated Statements of Earnings (Loss), which are included within Corporate, Other and Eliminations (in millions):

		Three Months Ended March 31,
Type of cost	Location	2020		2019
Accelerated depreciation	Cost of sales	$	1	$	—
Other exit costs	Cost of sales	2		1
Severance	Other expenses, net	2		—
Other exit costs (gains)	Other expenses, net	—		(3)
Total restructuring costs (gains)		$	5	$	(2)

Schedule of Restructuring Reserve by Type of Cost

Summary of Unpaid Liabilities

The following table summarizes the status of the unpaid liabilities from the Company's restructuring activities (in millions):

	Insulation Network Optimization Restructuring		Acquisition-Related Restructuring
Balance at December 31, 2019	$	5	$	11
Restructuring costs	5		—
Payments	(5)		(2)
Non-cash items and reclassifications to other accounts	(2)		1
Balance at March 31, 2020	$	3	$	10
Cumulative charges incurred	$	29	$	29

As of March 31, 2020, the remaining liability balance is comprised of $13 million of severance, inclusive of $1 million of non-current severance and $12 million of severance the Company expects to pay over the next twelve months.

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PROPERTY, PLANT AND EQUIPMENT

3 Months Ended

Mar. 31, 2020

Property, Plant and Equipment [Abstract]

PROPERTY, PLANT AND EQUIPTMENT

PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment consist of the following (in millions):

	March 31, 2020		December 31, 2019
Land	$	215	$	221
Buildings and leasehold improvements	1,174		1,186
Machinery and equipment	4,984		4,978
Construction in progress	218		310
	6,591		6,695
Accumulated depreciation	(2,844)		(2,840)
Property, plant and equipment, net	$	3,747	$	3,855

Machinery and equipment includes certain precious metals used in our production tooling, which comprise approximately 10% of total machinery and equipment as of both March 31, 2020 and December 31, 2019. Precious metals used in our production tooling are depleted as they are consumed during the production process, which typically represents an annual expense of about 3% of the outstanding carrying value.

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REVENUE

3 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

REVENUE

REVENUE

The following table shows a disaggregation of Net sales (in millions):

	For the three months ended March 31, 2020
Reportable Segments	Composites		Insulation		Roofing		Eliminations		Consolidated
Disaggregation Categories
U.S. residential	$	66	$	211	$	492	$	(50)	$	719
U.S. commercial and industrial	151		162		28		—		341
Europe	141		143		4		(1)		287
Asia-Pacific	105		20		3		—		128
Rest of world	31		67		28		—		126
NET SALES	$	494	$	603	$	555	$	(51)	$	1,601

	For the three months ended March 31, 2019
Reportable Segments	Composites		Insulation		Roofing		Eliminations		Consolidated
Disaggregation Categories
U.S. residential	$	67	$	196	$	551	$	(48)	$	766
U.S. commercial and industrial	154		155		25		—		334
Europe	150		143		4		(1)		296
Asia-Pacific	112		34		3		—		149
Rest of world	30		63		31		(2)		122
NET SALES	$	513	$	591	$	614	$	(51)	$	1,667

As of December 31, 2019, our contract liability balances (for extended warranties, down payments and deposits, collectively) totaled $60 million, of which $12 million was recognized as revenue in the first three months of 2020. As of March 31, 2020, our contract liability balances totaled $63 million.

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CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME

3 Months Ended

Mar. 31, 2020

Equity [Abstract]

CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME

CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME

The following table summarizes the changes in accumulated other comprehensive income (deficit) (in millions):

	Three Months Ended March 31,
	2020		2019
Currency Translation Adjustment
Beginning balance	$	(282)	$	(306)
Net investment hedge amounts classified into AOCI, net of tax	32		10
(Loss)/gain on foreign currency translation	(154)		1
Other comprehensive (loss)/income, net of tax	(122)		11
Ending balance	$	(404)	$	(295)
Pension and Other Postretirement Adjustment
Beginning balance	$	(326)	$	(350)
Amounts reclassified from AOCI to net earnings, net of tax (a)	7		1
Amounts classified into AOCI, net of tax	—		(2)
Other comprehensive income/(loss), net of tax	7		(1)
Ending balance	$	(319)	$	(351)
Hedging Adjustment
Beginning balance	$	(2)	$	—
Amounts classified into AOCI, net of tax	(3)		(1)
Amounts reclassified from AOCI to net earnings, net of tax (b)	2		—
Other comprehensive loss, net of tax	(1)		(1)
Ending balance	$	(3)	$	(1)
Total AOCI ending balance	$	(726)	$	(647)

(a)These AOCI components are included in the computation of total Pension and Other postretirement expense and are recorded in Non-operating income. See Note 11 for additional information.

(b)Amounts reclassified from (loss)/gain on cash flow hedges are reclassified from AOCI to income when the hedged item affects earnings and is recognized in Cost of sales or Interest expense, net depending on the hedged item. See Note 5 for additional information.

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DEBT (Details) - USD ($)			3 Months Ended
	Aug. 12, 2019	Jun. 27, 2017	Mar. 31, 2020	Mar. 31, 2018	Jun. 30, 2015	Jun. 30, 2013	Dec. 31, 2019	Jun. 30, 2019	Apr. 01, 2018	Jan. 25, 2018	Oct. 27, 2017	Jun. 26, 2017	Aug. 08, 2016	Jun. 30, 2016	Nov. 12, 2014	Oct. 17, 2012
Debt Instrument [Line Items]
Long-term debt			$ 3,374,000,000				$ 2,993,000,000
Fair value long-term debt			100.00%				100.00%
Other			$ 2,000,000				$ 3,000,000
Long-term debt, current maturities			161,000,000				7,000,000
Long-term debt, net of current portion			3,213,000,000				2,986,000,000
Line of credit facility, maximum borrowing capacity														$ 800,000,000
Short-term debt			$ 9,000,000				$ 20,000,000
Debt instrument, term			1 year
Short-term debt, weighted average interest rate, at point in time			8.20%				7.80%
Senior Notes Due 2022
Debt Instrument [Line Items]
Long-term debt			$ 184,000,000				$ 183,000,000
Fair value long-term debt			104.00%				104.00%
Long-term debt, percentage rate			4.20%					4.20%
Debt instrument, face amount																$ 600,000,000
Repayments of debt	$ 416,000,000
Senior Notes Due 2024
Debt Instrument [Line Items]
Long-term debt			$ 395,000,000				$ 395,000,000
Fair value long-term debt			105.00%				106.00%
Long-term debt, percentage rate			4.20%					4.20%
Debt instrument, face amount															$ 400,000,000
Senior Notes Due 2026
Debt Instrument [Line Items]
Long-term debt			$ 397,000,000				$ 396,000,000
Fair value long-term debt			96.00%				101.00%
Long-term debt, percentage rate			3.40%					3.40%
Debt instrument, face amount													$ 400,000,000
Senior Notes Due 2029
Debt Instrument [Line Items]
Long-term debt			$ 445,000,000				$ 445,000,000
Fair value long-term debt			96.00%				104.00%
Debt instrument, face amount	450,000,000
Senior Notes Due 2036
Debt Instrument [Line Items]
Long-term debt			$ 367,000,000				$ 367,000,000
Fair value long-term debt			127.00%				126.00%
Long-term debt, percentage rate			7.00%					7.00%
Debt instrument, face amount																$ 550,000,000
Repayments of debt	$ 34,000,000	$ 140,000,000
Senior Notes Due 2047
Debt Instrument [Line Items]
Long-term debt			$ 588,000,000				$ 588,000,000
Fair value long-term debt			82.00%				95.00%
Long-term debt, percentage rate			4.30%
Debt instrument, face amount												$ 600,000,000
Senior Notes Due 2048
Debt Instrument [Line Items]
Long-term debt			$ 390,000,000				$ 390,000,000
Fair value long-term debt			93.00%				97.00%
Long-term debt, percentage rate			4.40%
Debt instrument, face amount										$ 400,000,000
Various finance leases, due through 2032
Debt Instrument [Line Items]
Long-term debt			$ 56,000,000				$ 26,000,000
Fair value long-term debt			100.00%				100.00%
Term loan borrowings, maturing in 2021
Debt Instrument [Line Items]
Long-term debt			$ 150,000,000				$ 200,000,000
Fair value long-term debt			100.00%				100.00%
Senior Notes Due 2019
Debt Instrument [Line Items]
Repayments of debt		$ 144,000,000			$ 105,000,000	$ 100,000,000
Senior Notes Due 2016
Debt Instrument [Line Items]
Repayments of debt			$ 158,000,000		$ 242,000,000	$ 250,000,000
Term Loan Commitment Two
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity											$ 600,000,000
Senior Revolving Credit Facility B
Debt Instrument [Line Items]
Long-term debt			400,000,000				$ 0
Proceeds from issuance of debt				$ 600,000,000
Line of credit facility, maximum borrowing capacity			800,000,000
Availability on facility			396,000,000
Letter Of Credit Under Receivables Purchase Agreement
Debt Instrument [Line Items]
Long-term debt, current maturities									$ 280,000,000
Line of credit facility, maximum borrowing capacity			280,000,000
Availability on facility			$ 278,000,000

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Statement of Stockholders' Equity [Abstract]
Dividends (dollars per share)	$ 0.22	$ 0.22	$ 0.24

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GOODWILL AND OTHER INTANGIBLE ASSETS - AMORTIZATION EXPENSE (Details) $ in Millions	Mar. 31, 2020 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2021	$ 48
2022	46
2023	44
2024	40
2025	$ 38

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DOCUMENT AND ENTITY INFORMATION - shares	3 Months Ended
	Mar. 31, 2020	Apr. 24, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2020
Document Transition Report	false
Entity File Number	1-33100
Entity Registrant Name	Owens Corning
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	43-2109021
Entity Address, Address Line One	One Owens Corning Parkway,
Entity Address, City or Town	Toledo,
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	43659
City Area Code	419
Local Phone Number	248-8000
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	OC
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock Shares Outstanding		107,841,234
Entity Central Index Key	0001370946
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Amendment Flag	false

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Currency translation tax	$ (10)	$ (3)
Pension and other postretirement tax	0	0
Hedging tax	$ 1	$ 1

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EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Oct. 24, 2016
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Net earnings (loss) attributable to Owens Corning	$ (917.0)	$ 44.0
Weighted-average number of shares outstanding used for basic earnings per share	108,800,000	109,500,000
Non-vested restricted and performance shares	0	400,000
Options to purchase common stock	0	200,000
Weighted-average number of shares outstanding and common equivalent shares used for diluted earnings (loss) per share	108,800,000	110,100,000
Basic (in dollars per share)	$ (8.43)	$ 0.40
Diluted (in dollars per share)	$ (8.43)	$ 0.40
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, remaining number of shares authorized to be repurchased	2,300,000
Repurchase Program 2016
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, number of shares authorized to be repurchased			10,000,000
Stock repurchased during period, shares	1,300,000
Payments for repurchase of equity	$ 81.0
Performance Shares
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share amount		700,000
Restricted Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share amount		100,000

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STOCK COMPENSATION - Narrative (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) $ / shares shares	Mar. 31, 2019 USD ($)	Apr. 16, 2020 shares	Apr. 18, 2013 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share based compensation expense (less than)	$ 11	$ 11
Vesting period	4 years
Expected volatility rate	28.43%
Risk free interest rate	1.43%
Expected term (in years)	2 years 10 months 24 days
Grant date fair value of units granted | $ / shares	$ 68.60
Maximum employee subscription rate				85.00%
Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant | shares				2,000,000.0
Vesting period	4 years
Options Maximum term (in years)	10 years
Employee emergence equity program expense	$ 1	1
Restricted Stock Awards and Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Exercise price range, exercisable options, weighted average exercise price | $ / shares	$ 63.65
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	2 years 5 months 1 day
Compensation cost not yet recognized	$ 44
Vested in period, fair value	$ 19	$ 18
Performance Stock Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	2 years 1 month 28 days
Compensation cost not yet recognized	$ 17
Vested in period, fair value	1
Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost not yet recognized	$ 1
Stock Plan Member, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant | shares	3,500,000
Internal Based Performance Metric
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance stock payout minimum	0
Performance stock payout range maximum	3
External Based Performance Metric
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Performance stock payout minimum	0
Performance stock payout range maximum	2
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant | shares	300,000
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price range, exercisable options, weighted average exercise price | $ / shares	$ 25.45
Minimum | Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price range, exercisable options, weighted average exercise price | $ / shares	33.73
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price range, exercisable options, weighted average exercise price | $ / shares	42.16
Maximum | Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price range, exercisable options, weighted average exercise price | $ / shares	$ 42.16
Subsequent Event | Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant | shares			4,200,000

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GENERAL (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Accounting Changes and Error Corrections [Abstract]
Restricted cash	$ 7	$ 8	$ 7	$ 7
Goodwill impairment charge	$ 944	$ 0

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INVENTORIES (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Finished goods	$ 725	$ 715
Materials and supplies	337	318
Total inventories	$ 1,062	$ 1,033

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INCOME TAXES

3 Months Ended

Mar. 31, 2020

Income Tax Disclosure [Abstract]

INCOME TAXES

INCOME TAXES

The following table provides the Income tax expense (in millions) and effective tax rate for the periods indicated:

	Three Months Ended March 31,
	2020			2019
Income tax expense	$	24		$	39
Effective tax rate	-3		%	48		%

The difference between the effective tax rate and the U.S. federal statutory tax rate of 21% for the three months ended March 31, 2020 is primarily a result of charges related to the impairment of goodwill and certain other indefinite-lived intangible assets recorded in the three months ended March 31, 2020, which were mostly non-deductible. Non-cash charges of $18 million were recorded in the three months ended March 31, 2020 related to adjustments to valuation allowances against certain deferred tax assets. Additional items which account for the difference between the statutory rate of 21% and the effective rate are the impact of recording U.S. state and local income tax expense, the impact of U.S. federal taxes on foreign earnings, and other discrete adjustments.

The difference between the effective tax rate and the U.S. federal statutory tax rate of 21% for the three months ended March 31, 2019 is primarily due to U.S. state and local income tax expense, the impact of higher foreign tax rates, legislative changes as described in the following paragraph and other discrete adjustments.

On March 6, 2019, the U.S. Treasury and the IRS proposed regulations that provide guidance on determining the amount of a domestic corporation’s deduction for the global intangible low-taxed income (GILTI) and foreign-derived intangible income (FDII) recently added by the U.S. Tax Cuts and Jobs Act of 2017 (the "Tax Act"). The proposed regulations provide special rules in determining the deduction amount which adjusted the Company’s 2018 tax estimate resulting in an increase to tax expense of $12 million for the three months ended March 31, 2019.

The Company continues to assert indefinite reinvestment in accordance with ASC 740 based on the laws as of enactment of the Tax Act.

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PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS

3 Months Ended

Mar. 31, 2020

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS

PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS

Pension Plans

The Company sponsors defined benefit pension plans. Under the plans, pension benefits are based on an employee’s years of service and, for certain categories of employees, qualifying compensation. Company contributions to these pension plans are determined by an independent actuary to meet or exceed minimum funding requirements. In our non-U.S. plans, the unrecognized cost of any retroactive amendments and actuarial gains and losses are amortized over the average future service period of plan participants expected to receive benefits. In our U.S. plans, the unrecognized cost of any retroactive amendments and actuarial gains and losses are amortized over the average remaining life expectancy of the inactive participants as substantially all of the plan participants are inactive.

The following tables provide information regarding pension expense recognized (in millions):

	Three Months Ended March 31,
	2020						2019
	U.S.		Non-U.S.		Total		U.S.		Non-U.S.		Total
Components of Net Periodic Pension Cost
Service cost	$	1	$	1	$	2	$	1	$	1	$	2
Interest cost	7		2		9		9		3		12
Expected return on plan assets	(11)		(4)		(15)		(13)		(4)		(17)
Amortization of actuarial loss	3		1		4		3		1		4
Net periodic pension cost	$	—	$	—	$	—	$	—	$	1	$	1

The Company expects to contribute between $10 million and $25 million in cash to the U.S. pension plans and another $15 million to $25 million to non-U.S. plans during 2020. The Company made cash contributions of $11 million to the plans during the three months ended March 31, 2020.

Postemployment and Postretirement Benefits Other than Pension Plans ("OPEB")

The Company maintains healthcare and life insurance benefit plans for certain retired employees and their dependents. The health care plans in the United States are non-funded and pay either (1) stated percentages of covered medically necessary expenses, after subtracting payments by Medicare or other providers and after stated deductibles have been met, or (2) fixed amounts of medical expense reimbursement.

The following table provides the components of net periodic benefit cost for aggregated U.S. and non-U.S. plans for the periods indicated (in millions):

	Three Months Ended March 31,
	2020		2019
Components of Net Periodic Benefit Cost
Service cost	$	—	$	—
Interest cost	2		2
Amortization of prior service credit	(1)		(1)
Amortization of actuarial gain	(2)		(2)
Net periodic benefit income	$	(1)	$	(1)