Owens Corning (OC) 10-K 10 Feb 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2015	Jan. 31, 2016	Jun. 30, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	Owens Corning
Entity Central Index Key	1,370,946
Document Type	10-K
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Well Known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 4,850,794,039
Entity Common Stock, Shares Outstanding		115,540,535

CONSOLIDATED STATEMENTS OF EARN

CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
NET SALES	$ 5,350	$ 5,260	$ 5,295
COST OF SALES	4,197	4,284	4,329
Gross margin	1,153	976	966
OPERATING EXPENSES
Marketing and administrative expenses	525	487	530
Science and technology expenses	73	76	77
Charges related to cost reduction actions	(6)	37	8
Other expenses (income), net	13	(16)	(34)
Total operating expenses	605	584	581
EARNINGS BEFORE INTEREST AND TAXES	548	392	385
Interest expense, net	100	114	112
Loss (gain) on extinguishment of debt	(5)	46	0
EARNINGS BEFORE TAXES	453	232	273
Less: Income tax expense	120	5	68
Equity in net earnings of affiliates	1	1	0
NET EARNINGS	334	228	205
Less: Net earnings attributable to noncontrolling interests	4	2	1
NET EARNINGS ATTRIBUTABLE TO OWENS CORNING	$ 330	$ 226	$ 204
EARNINGS PER COMMON SHARE ATTRIBUTABLE TO OWENS CORNING COMMON STOCKHOLDERS
Basic (dollars per share)	$ 2.82	$ 1.92	$ 1.73
Diluted (dollars per share)	2.79	1.91	1.71
Dividend (dollars per share)	$ 0.68	$ 0.64	$ 0
WEIGHTED AVERAGE COMMON SHARES
Basic (in shares)	117.2	117.5	118.2
Diluted (in shares)	118.2	118.3	119.1

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
NET EARNINGS	$ 334	$ 228	$ 205
Currency translation adjustment, including net investment hedge (net of tax of $(5), $0, and $0, for the periods ended December 31, 2015, 2014 and 2013, respectively)	(115)	(134)	(28)
Pension and other postretirement adjustment (net of tax of $1, $67, and $(45), for the periods ended December 31, 2015, 2014 and 2013, respectively)	(6)	(113)	94
Deferred income (loss) on hedging (net of tax of $(1), $3, and $(1) for the periods ended December 31, 2015, 2014 and 2013, respectively)	1	(6)	1
COMPREHENSIVE EARNINGS (LOSS)	214	(25)	272
Less: Comprehensive earnings attributable to noncontrolling interests	4	2	1
COMPREHENSIVE EARNINGS (LOSS) ATTRIBUTABLE TO OWENS CORNING	$ 210	$ (27)	$ 271

CONSOLIDATED STATEMENTS OF COM4

CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (LOSS) (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Pension and other postretirement adjustment	$ 1	$ 67	$ (45)
Deferred income (loss) on hedging	(1)	3	(1)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	$ (5)	$ 0	$ 0

CONSOLIDATED BALANCE SHEETS CON

CONSOLIDATED BALANCE SHEETS CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CURRENT ASSETS
Cash and cash equivalents		$ 96	$ 67	$ 57	$ 55
Receivables, less allowances of $8 at December 31, 2015 and $10 at December 31, 2014		709	674
Inventories		644	817
Assets held for sale – current		12	16
Other current assets		77	233
Total current assets		1,538	1,807
Property, plant and equipment, net		2,956	2,899
Goodwill		1,167	1,168
Intangible assets, net		999	1,017
Deferred income taxes		492	444
Other non-current assets		228	207
TOTAL ASSETS		7,380	7,542
CURRENT LIABILITIES
Accounts payable and accrued liabilities		948	949
Short-term debt		6	31
Long-term debt – current portion		163	3
Total current liabilities		1,117	983
Long-term debt, net of current portion		1,702	1,978
Pension plan liability		397	447
Other employee benefits liability		240	252
Deferred income taxes		8	22
Other liabilities		137	130
OWENS CORNING STOCKHOLDERS’ EQUITY
Preferred stock, par value $0.01 per share (a)	[1]	0	0
Common stock, par value $0.01 per share (b)	[2]	1	1
Additional paid in capital		3,965	3,954
Accumulated earnings		1,055	805
Accumulated other comprehensive deficit		(670)	(550)
Cost of common stock in treasury (c)	[3]	(612)	(518)
Total Owens Corning stockholders’ equity		3,739	3,692
Noncontrolling interests		40	38
Total equity		3,779	3,730	$ 3,830	$ 3,575
TOTAL LIABILITIES AND EQUITY		$ 7,380	$ 7,542
[1]	10 shares authorized; none issued or outstanding at December 31, 2015 and December 31, 2014
[2]	400 shares authorized; 135.5 issued and 115.9 outstanding at December 31, 2015; 135.5 issued and 117.8 outstanding at December 31, 2014
[3]	19.6 shares at December 31, 2015 and 17.7 shares at December 31, 2014

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 8	$ 10
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	115,900,000	117,800,000
Treasury stock shares	19,600,000	17,700,000

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common Stock Outstanding [Member]	Treasury Stock [Member]	Additional Paid In Capital [Member]	[1]	Accumulated Earnings (Deficit) [Member]	Accumulated Other Comprehensive Income [Member]		Noncontrolling Interest [Member]
Beginning Balance (in shares) at Dec. 31, 2012		118,300,000	17,300,000
Beginning balance at Dec. 31, 2012	$ 3,575	$ 1	$ (475)	$ 3,925		$ 451	$ (364)	[2]	$ 37	[3]
Increase Decrease In Stockholders Equity [Roll Forward]
Net earnings attributable to Owens Corning	204					204			0	[3]
Net earnings attributable to noncontrolling interests	1								1
Currency translation adjustment	(29)						(28)	[2]	(1)	[3]
Pension and other postretirement adjustment (net of tax)	94						94	[2]
Deferred gain on hedging transactions (net of tax)	$ 1						1	[2]
Stock issuance (in shares)	(549,800)	(500,000)	(600,000)
Stock issuance	$ 16		$ 17	(1)
Purchases of treasury stock	(63)		$ (63)
Purchase of treasury stock (in shares)		1,600,000	1,600,000
Stock-based compensation	31		$ 17	14
Stock-based compensation (in shares)		(600,000)	(600,000)
Ending Balance at Dec. 31, 2013	3,830	$ 1	$ (504)	3,938		655	(297)	[2]	37	[3]
Ending Balance (in shares) at Dec. 31, 2013		117,800,000	17,700,000
Increase Decrease In Stockholders Equity [Roll Forward]
Net earnings attributable to Owens Corning	226					226			0	[3]
Net earnings attributable to noncontrolling interests	2								2
Currency translation adjustment	(135)						(134)	[2]	(1)	[3]
Pension and other postretirement adjustment (net of tax)	(113)						(113)	[2]
Deferred gain on hedging transactions (net of tax)	$ (6)						(6)	[2]
Stock issuance (in shares)	(328,875)	(300,000)	(300,000)
Stock issuance	$ 8		$ 9	(1)
Purchases of treasury stock	(44)		$ (44)
Purchase of treasury stock (in shares)		1,000,000	1,000,000
Stock-based compensation	38		$ 21	17
Stock-based compensation (in shares)		(700,000)	(700,000)
Dividends declared	(76)					(76)
Ending Balance at Dec. 31, 2014	3,730	$ 1	$ (518)	3,954		805	(550)	[2]	38	[3]
Ending Balance (in shares) at Dec. 31, 2014		117,800,000	17,700,000
Increase Decrease In Stockholders Equity [Roll Forward]
Net earnings attributable to Owens Corning	330					330			0	[3]
Net earnings attributable to noncontrolling interests	4								4
Currency translation adjustment	(117)						(115)		(2)
Pension and other postretirement adjustment (net of tax)	(6)						(6)
Deferred gain on hedging transactions (net of tax)	$ 1						1
Stock issuance (in shares)	(691,375)	(700,000)	(700,000)
Stock issuance	$ 20		$ 21	(1)
Purchases of treasury stock	(140)		$ (140)
Purchase of treasury stock (in shares)		3,300,000	3,300,000
Stock-based compensation	37		$ 25	12
Stock-based compensation (in shares)		(700,000)	(700,000)
Dividends declared	(80)					(80)
Ending Balance at Dec. 31, 2015	$ 3,779	$ 1	$ (612)	$ 3,965		$ 1,055	$ (670)	[2]	$ 40	[3]
Ending Balance (in shares) at Dec. 31, 2015		115,900,000	19,600,000
[1]	Additional Paid in Capital (“APIC”)
[2]	Accumulated Other Comprehensive Earnings (Deficit) (“AOCI”)
[3]	Noncontrolling Interest (“NCI”)

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
NET CASH FLOW PROVIDED BY OPERATING ACTIVITIES
NET EARNINGS	$ 334	$ 228	$ 205
Adjustments to reconcile net earnings to cash provided by operating activities:
Depreciation and amortization	300	304	332
Gain on sale of assets or affiliates	(2)	(55)	(6)
Net loss on sale of European Stone Business	0	20	0
Proceeds from Hurricane Sandy insurance claims	0	0	(58)
Deferred income taxes	64	(15)	54
Provision for pension and other employee benefits liabilities	15	18	23
Stock-based compensation expense	30	29	28
Other non-cash	(11)	(30)	(18)
Loss (gain) on extinguishment of debt	(5)	46	0
Changes in receivables, net	(71)	(10)	(77)
Changes in inventories	150	(29)	(27)
Changes in accounts payable and accrued liabilities	28	3	22
Changes in other current assets	(19)	(3)	4
Other	0	0	0
Pension fund contribution	(60)	(52)	(39)
Payments for other employee benefits liabilities	(20)	(22)	(22)
Other	9	20	(38)
Net cash flow provided by operating activities	742	452	383
NET CASH FLOW USED FOR INVESTING ACTIVITIES
Cash paid for property, plant and equipment	(393)	(374)	(311)
Derivative settlements	4	5	0
Proceeds from the sale of assets or affiliates	20	65	0
Investment in subsidiaries and affiliates, net of cash acquired	0	(12)	(62)
Proceeds from Hurricane Sandy insurance claims	0	0	58
Deposit related to sale of Hangzhou, China plant	0	0	34
Purchases of alloy	(8)	(28)	(18)
Proceeds from sale of alloy	8	47	16
Net cash flow used for investing activities	(369)	(297)	(283)
NET CASH FLOW USED FOR FINANCING ACTIVITIES
Proceeds from senior revolving credit and receivables securitization facilities	1,546	1,276	1,063
Payments on senior revolving credit and receivables securitization facilities	(1,652)	(1,344)	(1,103)
Proceeds from long-term debt	0	390	0
Payments on long-term debt	(8)	(402)	(2)
Dividends paid	(78)	(56)	0
Net increase (decrease) in short-term debt	(22)	30	(4)
Purchases of treasury stock	(138)	(44)	(63)
Other	19	8	13
Net cash flow used for financing activities	(333)	(142)	(96)
Effect of exchange rate changes on cash	(11)	(3)	(2)
Net increase in cash and cash equivalents	29	10	2
Cash and cash equivalents at beginning of period	67	57	55
Cash and cash equivalents at end of period	96	67	57
Cash paid during the year for income taxes	33	19	29
Cash paid during the year for interest	$ 113	$ 122	$ 126

BUSINESS AND SUMMARY OF SIGNIFI

BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Description of Business Owens Corning, a Delaware corporation, is a leading global producer of glass fiber reinforcements and other materials for composite systems and of residential and commercial building materials. The Company operates within three segments: Composites, which includes the Company’s Reinforcements and Downstream businesses; Insulation and Roofing. Through these lines of business, Owens Corning manufactures and sells products worldwide. The Company maintains leading market positions in many of its major product categories. General On February 4, 2016, the Board of Directors declared a quarterly dividend of $0.18 per common share payable on April 4, 2016 to shareholders of record as of March 11, 2016. During 2015, the Company recorded additional income tax expense of $8 million related to prior periods. The effects of these charges were not material to the current or any previously issued financial statements. During the fourth quarter of 2015, the Company discovered an error between Net sales and Cost of sales due to incorrect eliminations in our Composites segment. For the twelve months ended December 31, 2014, the previously reported Net sales and Cost of sales were overstated by $16 million . The related amounts presented on the Consolidated Statements of Earnings for the twelve months ended December 31, 2014 were revised. Please refer to Note 20 of the Notes to Consolidated Financial Statements for information about the revisions to the interim periods of 2015 and 2014. The effect of correcting these errors was not material to any previously issued financial statements. In the fourth quarter of 2015, the Company revised the Consolidated and Condensed Consolidating Statements of Cash Flows for the twelve months ended December 31, 2014 and 2013 to correct an error for the presentation of non-cash cash capital expenditures which impacted the operating activities section and the investing activities section. For the twelve months ended December 31, 2014, the impact of this revision increased cash used for Cash paid for property, plant and equipment, cash provided by Changes in accounts payable and accrued liabilities and the related Statements of Cash Flows subtotals by $11 million . For the twelve months ended December 31, 2013, the impact of this revision reduced cash used for Cash paid for property, plant and equipment, cash provided by Changes in accounts payable and accrued liabilities and the related Statements of Cash Flows subtotals by $24 million . The effects of these revisions did not impact the ending cash balance for any period and were not material to any previously issued financial statements. This classification error also impacted the unaudited Consolidated and Condensed Consolidating Statements of Cash Flows for the three months ended March 31, the six months ended June 30, and the nine months ended September 30, 2015 and 2014, respectively. For the three months ended March 31, 2015 and 2014, the impact of this revision increased cash used for Cash paid for property, plant and equipment and decreased cash used for Changes in working capital by $33 million and $29 million , respectively. For the six months ended June 30, 2015 and 2014, the impact of this revision increased cash used for Cash paid for property, plant and equipment and decreased cash used for Changes in working capital by $26 million and $15 million , respectively. For the nine months ended September 30, 2015 and 2014, the impact of this revision increased cash used for Cash paid for property, plant and equipment and decreased cash used for Changes in working capital by $26 million and $16 million , respectively. The effects of these revisions did not impact the ending cash balance for any period and were not material to any previously issued financial statements. Basis of Presentation Unless the context requires otherwise, the terms “Owens Corning,” “Company,” “we” and “our” in these notes refer to Owens Corning and its subsidiaries. The accompanying Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States. Principles of Consolidation The Consolidated Financial Statements of the Company include the accounts of majority-owned subsidiaries. Intercompany accounts and transactions are eliminated. Reclassifications Certain reclassifications have been made to the 2014 and 2013 Consolidated Financial Statements and Notes to the Consolidated Financial Statements to conform to the classifications used in 2015 . During the fourth quarter of 2015, the Company adopted Financial Accounting Standards Board (the "FASB") Accounting Standards Update ("ASU") No. 2015-03, resulting in a reclassification of debt issuance costs for all periods presented in the Consolidated Financial Statements and Notes to the Consolidated Financial Statements to conform to the classifications used in 2015. This change was also applied to the selected financial data table in Item 6 of this Form 10-K. Please refer to the accounting pronouncements section of Note 1 and Note 11 for additional detail on this adoption. Use of Estimates and Assumptions The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ materially from those estimates. Revenue Recognition Revenue is recognized when title and risk of loss pass to the customer and collectability is reasonably assured. Provisions for discounts and rebates to customers, returns and other adjustments are provided in the same period that the related sales are recorded and are based on historical experience, current conditions and contractual obligations, as applicable. Cost of Sales Cost of sales includes material, labor, energy and manufacturing overhead costs, including depreciation and amortization expense associated with the manufacture and distribution of the Company’s products. Provisions for warranties are provided in the same period that the related sales are recorded and are based on historical experience, current conditions and contractual obligations, as applicable. Distribution costs include inbound freight costs; purchasing and receiving costs; inspection costs; warehousing costs; shipping and handling costs, which include costs incurred relating to preparing, packaging, and shipping products to customers; and other costs of the Company’s distribution network. All shipping and handling costs billed to the customer are included as net sales in the Consolidated Statements of Earnings. Marketing and Advertising Expenses Marketing and advertising expenses are included in Marketing and administrative expenses. These costs include advertising and marketing communications, which are expensed the first time the advertisement takes place. Marketing and advertising expenses for the years ended December 31, 2015 , 2014 and 2013 were $98 million , $100 million and $105 million , respectively. Science and Technology Expenses The Company incurs certain expenses related to science and technology. These expenses include salaries, building and equipment costs, utilities, administrative expenses, materials and supplies associated with the improvement and development of the Company’s products and manufacturing processes. These costs are expensed as incurred. Earnings per Share Basic earnings per share are computed using the weighted-average number of common shares outstanding during the period. Diluted earnings per share reflect the dilutive effect of common equivalent shares and increased shares that would result from the conversion of equity securities. The effects of anti-dilution are not presented. Cash and Cash Equivalents The Company defines cash and cash equivalents as cash and time deposits with maturities of three months or less when purchased. Accounts Receivable Trade accounts receivable are recorded at the invoiced amount and do not bear interest. The allowance for doubtful accounts is an estimate of the amount of probable credit losses in our existing accounts receivable. Account balances are charged off against the allowance when the Company believes it is probable the receivable will not be recovered. Inventory Valuation Inventory costs include material, labor, and manufacturing overhead costs, including depreciation and amortization expense associated with the manufacture and distribution of the Company’s products. Inventories are stated at lower of cost or market value and expense estimates are made for excess and obsolete inventories. Cost is determined by the first-in, first-out (“FIFO”) method. Investments in Affiliates The Company accounts for investments in affiliates of 20% to 50% ownership when the Company does not have a controlling financial interest using the equity method under which the Company’s share of earnings and losses of the affiliate is reflected in earnings and dividends are credited against the investment in affiliate when declared. Investments in affiliates are recorded in other non-current assets on the Consolidated Balance Sheets and as of December 31, 2015 and 2014 the total value of investments was $54 million and $53 million , respectively. Goodwill and Other Intangible Assets Goodwill assets are not amortized but are tested for impairment on at least an annual basis. In the current year, as part of the annual assessment, the Company used a quantitative approach to determine whether the fair value of a reporting unit was less than its carrying amount. As part of our testing process for goodwill the Company estimates fair values using a discounted cash flow approach from the perspective of a market participant. Significant estimates in the discounted cash flow approach are cash flow forecasts of our reporting units, the discount rate, the terminal business value and the projected income tax rate. The cash flow forecasts of the reporting units are based upon management’s long-term view of our markets and are the forecasts that are used by senior management and the Board of Directors to 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. The projected income tax rates utilized are the statutory tax rates for the countries where each reporting unit operates. The terminal business value is determined by applying a business growth factor to the latest year for which a forecast exists. As part of our goodwill quantitative testing process, we would evaluate whether there are reasonably likely changes to management’s estimates that would have a material impact on the results of the goodwill impairment testing. Other indefinite-lived intangible assets are not amortized but are tested for impairment on at least an annual basis or when determined to have a finite useful life. Substantially all of the indefinite-lived intangible assets are in trademarks and trade names. The Company uses the royalty relief approach to determine whether it is more likely than not that the fair value of these assets is less than its carrying amount. This review is performed annually, or when circumstances arise which indicate there may be impairment. When applying the royalty relief approach, the Company performs a discounted cash flow analysis based on the value derived from owning these trademarks and trade names and being relieved from paying royalty to third parties. Significant assumptions used include projected cash flows, discount rate, projected income tax rate and terminal business value. These inputs are considered Level 3 inputs under the fair value hierarchy as they are the Company’s own data, and are unobservable in the marketplace. Identifiable intangible assets with a determinable useful life are amortized over that determinable life. Amortization expense for the years ended December 31, 2015 , 2014 and 2013 was $22 million , $21 million and $22 million , respectively. See Note 5 to the Consolidated Financial Statements for further discussion. Properties and Depreciation Property, plant and equipment are stated at cost and depreciated over their estimated useful lives using the straight-line method. Property, plant and equipment accounts are relieved of the cost and related accumulated depreciation when assets are disposed of or otherwise retired. Precious metals used in our production tooling are included in property, plant and equipment and are depleted as they are consumed during the production process. Depletion typically represents an annual expense of less than 3% of the outstanding value and is recorded in Cost of sales on the Consolidated Statements of Earnings. For the years ended December 31, 2015 , 2014 and 2013 depreciation expense was $278 million , $283 million and $310 million , respectively. In 2015 , 2014 and 2013, depreciation expense included $3 million , $1 million and $9 million , respectively, of accelerated depreciation related to cost reduction actions further explained in Note 10 to the Consolidated Financial Statements. In 2014, depreciation expense also included $3 million of impairment losses on held for sale assets. In 2013, depreciation expense included $20 million of accelerated depreciation related to the change in useful life of assets recorded as a result of our assessment of the future utility of an incomplete Insulation facility located in Cordele, Georgia. The range of useful lives for the major components of the Company’s plant and equipment is as follows: Buildings and leasehold improvements 15 – 40 years Machinery and equipment Furnaces 4 – 15 years Information systems 5 – 10 years Equipment 5 – 20 years Expenditures for normal maintenance and repairs are expensed as incurred. Asset Impairments The Company evaluates tangible and intangible long-lived assets for impairment when triggering events have occurred. This requires significant assumptions including projected cash flows, projected income tax rate and terminal business value. These inputs are considered Level 3 inputs under the fair value hierarchy as they are the Company’s own data, and are unobservable in the marketplace. Changes in management intentions, market conditions or operating performance could indicate that impairment charges might be necessary that would be material to the Company’s Consolidated Financial Statements in any given period. Income Taxes The Company recognizes current tax liabilities and assets for the estimated taxes payable or refundable on the tax returns for the current year. Deferred tax balances reflect the impact of temporary differences between the carrying amount of assets and liabilities and their tax basis. Amounts are stated at enacted tax rates expected to be in effect when taxes are actually paid or recovered. In addition, realization of certain deferred tax assets is dependent upon our ability to generate future taxable income. The Company records a valuation allowance to reduce its deferred tax assets to the amount that it believes is more likely than not to be realized. In addition, the Company estimates tax reserves to cover potential taxing authority claims for income taxes and interest attributable to audits of open tax years. Taxes Collected from Customers and Remitted to Government Authorities and Taxes Paid to Vendors Taxes are assessed by various governmental authorities at different rates on many different types of transactions. The Company charges sales tax or Value Added Tax (“VAT”) on sales to customers where applicable, as well as captures and claims back all available VAT that has been paid on purchases. VAT is recorded in separate payable or receivable accounts and does not affect revenue or cost of sales line items in the income statement. VAT receivable is recorded as a percentage of qualifying purchases at the time the vendor invoice is processed. VAT payable is recorded as a percentage of qualifying sales at the time an Owens Corning sale to a customer subject to VAT occurs. Amounts are paid to the taxing authority according to the method and collection prescribed by local regulations. Where applicable, VAT payable is netted against VAT receivable. The Company also pays sales tax to vendors who include a tax, required by government regulations, to the purchase price charged to the Company. Pension and Other Postretirement Benefits Accounting for pensions and other postretirement benefits involves estimating the cost of benefits to be provided well into the future and attributing that cost over the time period each employee works. To accomplish this, extensive use is made of assumptions about investment returns, discount rates, inflation, mortality, turnover and medical costs. Derivative Financial Instruments The Company recognizes all derivative instruments as either assets or liabilities at fair value on the balance sheet. To the extent that a derivative is effective as a cash flow hedge, the change in fair value of the derivative is deferred in accumulated other comprehensive income/deficit (“OCI”). Any portion considered to be ineffective is reported in earnings immediately. To the extent that a derivative is effective as a fair value hedge, the change in the fair value of the derivative is offset by the change in the fair value of the item being hedged in the Consolidated Statements of Earnings. See Note 4 to the Consolidated Financial Statements for further discussion. Foreign Currency The functional currency of the Company’s subsidiaries is generally the applicable local currency. Assets and liabilities of foreign subsidiaries are translated into United States dollars at the period-end rate of exchange, and their Statements of Earnings and Statements of Cash Flows are converted on an ongoing basis at the monthly average rate. The resulting translation adjustment is included in accumulated OCI in the Consolidated Balance Sheets and Consolidated Statements of Stockholders’ Equity. Transaction gains and losses that arise from exchange rate fluctuations on transactions denominated in a currency other than the functional currency are included in the Consolidated Statements of Earnings as incurred. The Company recorded a foreign currency transaction loss of $5 million , $4 million and $3 million during the years ended December 31, 2015 , 2014 and 2013 , respectively. Accounting Pronouncements In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” (“ASU 2014-09”). ASU 2014-09 outlines a new, single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. This new revenue recognition model provides a five-step analysis in determining when and how revenue is recognized. The new model will require revenue recognition to depict the transfer of promised goods or services to customers in an amount that reflects the consideration a company expects to receive in exchange for those goods or services. The Company is currently assessing the impact that adopting this new accounting guidance will have on its Consolidated Financial Statements and footnote disclosures. ASU 2014-09 is effective, as amended by ASU 2015-14, for fiscal years, and interim periods within those years, beginning after December 15, 2017, and early adoption is permitted. Accordingly, the standard is effective for the Company on January 1, 2018. In April 2015, the FASB issued ASU No. 2015-03, "Interest-Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs" ("ASU 2015-03"). ASU 2015-03 requires debt issuance costs to be presented in the balance sheet as a direct deduction from the carrying value of the associated debt liability, consistent with the presentation of a debt discount. Prior to the issuance of the standard, debt issuance costs were required to be presented in the balance sheet as an asset. In August 2015, the FASB issued ASU 2015-15, "Interest-Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements," ("ASU 2015-15"). ASU 2015-15 states that entities may continue presenting unamortized debt issuance costs for line-of-credit arrangements as an asset, which results in no change to our Consolidated Financial Statements. The retrospective adoption of ASU 2015-03 affected the presentation of debt issuance costs related to our senior notes. Please refer to Note 11 of the Consolidated Financial Statements for additional detail on this adoption. In April 2015, the FASB issued ASU No. 2015-04, "Compensation-Retirement Benefits (Topic 715): Practical Expedient for the Measurement Date of an Employer's Defined Benefit Obligation and Plan Assets" ("ASU 2015-04"). ASU 2015-04 provides a practical expedient for entities to use when a significant event occurs in an interim period that requires remeasurement of defined benefit plan assets and obligations. Entities are permitted to remeasure defined benefit plan assets and obligations using the month-end that is closest to the date of the significant event. The update is not expected to have a material impact on the Company's Consolidated Financial Statements. ASU 2015-04 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2015, and early adoption is permitted. Accordingly, the standard is effective for the Company on January 1, 2016. In July 2015, the FASB issued ASU No. 2015-07, "Fair Value Measurement (Topic 820): Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent)" ("ASU 2015-07"). ASU 2015-07 modifies the practical expedient that permits an entity to measure the fair value of certain investments using the net asset value per share of the investment. The amendment removes the requirement to categorize investments within the fair value hierarchy that are measured using this practical expedient. The amendment also limits disclosure to investments for which the practical expedient has been elected instead of all investments eligible for the practical expedient. The Company is currently assessing the impact that adopting this new accounting guidance will have on its Consolidated Financial Statements. ASU 2015-07 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2015, and early adoption is permitted. Accordingly, the standard is effective for the Company on January 1, 2016. In July 2015, the FASB issued ASU No. 2015-11 "Inventory (Topic 330): Simplifying the Measurement of Inventory" ("ASU 2015-11"). ASU 2015-11 requires that inventory be subsequently measured at the lower or cost or net realizable value. Prior to the issuance of this standard, inventory was measured at the lower of cost or market. The update is not expected to have a material impact on the Company's Consolidated Financial Statements. ASU 2015-11 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016, and early adoption is permitted. Accordingly, the standard is effective for the Company on January 1, 2017. In August 2015, the FASB issued ASU No. 2015-13 "Derivatives and Hedging (Topic 815): Application of the Normal Purchases and Normal Sales Scope Exception to Certain Electricity Contracts within Nodal Energy Markets" ("ASU 2015-13"). ASU 2015-13 now allows the application of the normal purchases and normal sales scope exception to energy purchases in nodal market delivery hubs. The update is not expected to have a material impact on the Company's Consolidated Financial Statements. ASU 2015-13 is effective immediately. In September 2015, the FASB issued ASU No. 2015-16 "Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments" ("ASU 2015-16"). ASU 2015-16 requires that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. Prior to the issuance of the standard, entities were required to retrospectively apply adjustments made to provisional amounts recognized in a business combination. The update is not expected to have a material impact on the Company's Consolidated Financial Statements. ASU 2015-16 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2015, and early adoption is permitted. Accordingly, the standard is effective for the Company on January 1, 2016. In November 2015, the FASB issued ASU No. 2015-17 "Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes" ("ASU 2015-17"). ASU 2015-17 requires that deferred tax liabilities and assets be classified as noncurrent in a classified statement of financial position. The current requirement that deferred tax liabilities and assets of a tax-paying component of an entity be offset and presented as a single amount is not affected by the amendments in ASU 2015-17. ASU 2015-17 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016. Early adoption is permitted and the standard may be applied either retrospectively or on a prospective basis to all deferred tax assets and liabilities. The Company adopted this standard prospectively in the fourth quarter of 2015. Please refer to Note 19 of the Consolidated Financial Statements for additional detail on this adoption. In January 2016, the FASB issued ASU No. 2016-01 "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities" ("ASU 2016-01"). ASU 2016-01 modifies certain aspects of the recognition, measurement, presentation, and disclosure of financial instruments. The Company is currently assessing the impact that adopting this new accounting guidance will have on its Consolidated Financial Statements. ASU 2016-01 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2017, and early adoption is permitted. Accordingly, the standard is effective for the Company on January 1, 2018.

SEGMENT INFORMATION

SEGMENT INFORMATION	12 Months Ended
	Dec. 31, 2015
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 Composites segment is comprised of our Reinforcements and Downstream businesses. Within the Reinforcements business, the Company manufactures, fabricates and sells glass reinforcements in the form of fiber. Within the Downstream business, the Company manufactures and sells 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, energy efficient flexible duct media, bonded and granulated mineral fiber 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, and roofing accessories used in residential and commercial construction and specialty applications. NET SALES The following table summarizes our net sales by segment and geographic region (in millions). External customer sales are attributed to geographic region based upon the location from which the product is shipped to the external customer. Twelve Months Ended December 31, 2015 2014 2013 Reportable Segments Composites $ 1,902 $ 1,919 $ 1,845 Insulation 1,850 1,746 1,642 Roofing 1,766 1,748 1,967 Total reportable segments 5,518 5,413 5,454 Corporate eliminations (168 ) (153 ) (159 ) NET SALES $ 5,350 $ 5,260 $ 5,295 External Customer Sales by Geographic Region United States $ 3,697 $ 3,557 $ 3,644 Europe 515 575 545 Asia Pacific 662 636 627 Canada and other 476 492 479 NET SALES $ 5,350 $ 5,260 $ 5,295 EARNINGS BEFORE INTEREST AND TAXES Earnings before interest and taxes (“EBIT”) by segment consists 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 in the Corporate, Other and Eliminations category. The following table summarizes EBIT by segment (in millions): Twelve Months Ended December 31, 2015 2014 2013 Reportable Segments Composites $ 232 $ 149 $ 98 Insulation 160 108 40 Roofing 266 232 386 Total reportable segments 658 489 524 Charges related to cost reduction actions and related items (2 ) (36 ) (26 ) Net loss on sale of European Stone Business — (20 ) — Impairment loss on Alcala, Spain facility held for sale — (3 ) — Gain on sale of Hangzhou, China facility — 45 — Net gain (loss) related to Hurricane Sandy — (6 ) 15 Accelerated depreciation related to a change in the useful life of assets at our incomplete Cordele, Georgia facility — — (20 ) General corporate expense and other (108 ) (77 ) (108 ) EBIT $ 548 $ 392 $ 385 TOTAL ASSETS AND PROPERTY, PLANT AND EQUIPMENT BY GEOGRAPHIC REGION The following table summarizes total assets by segment and property, plant and equipment by geographic region (in millions): December 31, TOTAL ASSETS 2015 2014 Reportable Segments Composites $ 2,359 $ 2,387 Insulation 2,873 2,844 Roofing 1,055 1,138 Total reportable segments 6,287 6,369 Cash and cash equivalents 96 67 Current and noncurrent deferred income taxes 492 580 Investments in affiliates 54 53 Assets held for sale – current 12 16 Corporate property, plant and equipment, other assets and eliminations 439 457 CONSOLIDATED TOTAL ASSETS $ 7,380 $ 7,542 December 31, PROPERTY, PLANT AND EQUIPMENT BY GEOGRAPHIC REGION 2015 2014 United States $ 1,918 $ 1,773 Europe 359 404 Asia Pacific 347 377 Canada and other 332 345 TOTAL PROPERTY, PLANT AND EQUIPMENT $ 2,956 $ 2,899 PROVISION FOR DEPRECIATION AND AMORTIZATION The following table summarizes the provision for depreciation and amortization by segment (in millions): Twelve Months Ended December 31, 2015 2014 2013 Reportable Segments Composites $ 125 $ 129 $ 130 Insulation 101 101 104 Roofing 39 39 38 Total reportable segments 265 269 272 General corporate depreciation and amortization (a) 35 35 60 CONSOLIDATED PROVISION FOR DEPRECIATION AND AMORTIZATION $ 300 $ 304 $ 332 (a) 2015 and 2014 include $3 million and $1 million , respectively, of accelerated depreciation related to our decision to close a facility in Japan and optimize a facility in Canada. 2013 includes $9 million of accelerated depreciation related to cost reduction actions and $20 million of accelerated depreciation related to the change in useful life of assets recorded as a result of our assessment of the future utility of an incomplete Insulation facility located in Cordele, Georgia. ADDITIONS TO PROPERTY, PLANT AND EQUIPMENT The following table summarizes additions to property, plant and equipment by segment (in millions): Twelve Months Ended December 31, 2015 2014 2013 Reportable Segments Composites $ 186 $ 239 $ 155 Insulation 141 78 107 Roofing 44 41 60 Total reportable segments 371 358 322 General corporate additions 40 33 31 CONSOLIDATED ADDITIONS TO PROPERTY, PLANT AND EQUIPMENT $ 411 $ 391 $ 353 The amounts in the table above represent Additions to property, plant and equipment on an accrual basis.

INVENTORIES

INVENTORIES	12 Months Ended
	Dec. 31, 2015
Inventory Disclosure [Abstract]
INVENTORIES	INVENTORIES Inventories consist of the following (in millions): December 31, 2015 2014 Finished goods $ 436 $ 568 Materials and supplies 208 249 Total inventories $ 644 $ 817

DERIVATIVE FINANCIAL INSTRUMENT

DERIVATIVE FINANCIAL INSTRUMENTS	12 Months Ended
	Dec. 31, 2015
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 December 31, 2015 and 2014 , 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. The following table presents the fair value and respective location of derivatives and hedging instruments on the Consolidated Balance Sheets (in millions): Fair Value at Location December 31, 2015 December 31, 2014 Derivative assets designated as hedging instruments: Net investment hedges Cross currency swaps Other current assets $ 4 $ — Cross currency swaps Other non current assets $ 6 $ — Amount of gain recognized in OCI (effective portion) OCI $ 14 $ — Fair value hedges Interest rate swaps Other non current assets $ 4 $ — Derivative liabilities designated as hedging instruments: Fair value hedges Interest rate swaps Other liabilities $ — $ (3 ) Cash flow hedges: Natural gas forward swaps Accounts payable and accrued liabilities $ 5 $ 8 Amount of loss recognized in OCI (effective portion) OCI $ 5 $ 7 Foreign exchange contracts Accounts payable and accrued liabilities $ — $ 1 Amount of loss recognized in OCI (effective portion) OCI $ 1 $ 1 Derivative assets not designated as hedging instruments: Foreign exchange contracts Other current assets $ — $ 1 Derivative liabilities not designated as hedging instruments: Natural gas forward swaps Accounts payable and accrued liabilities $ 1 $ — Foreign exchange contracts Accounts payable and accrued liabilities $ — $ 2 The following table presents the notional of derivatives and hedging instruments on the Consolidated Balance Sheets (in millions): Notional Unit of Measure December 31, 2015 Net investment hedges Cross currency swaps U.S. Dollars $ 250 Fair value hedges Interest rate swaps U.S. Dollars $ 100 Cash flow hedges: Natural gas forward swaps U.S. indices MMBtu 8 Natural gas forward swaps European indices MMBtu (equivalent) 1 The Company had notional amounts for derivative hedging instruments related to non-designated foreign currency exposure in U.S. Dollars primarily relative to Brazilian Real, Chinese Yuan, Indian Rupee, and South Korean Won for $129 million . In addition the Company had notional amounts for derivative hedging instruments related to non-designated foreign currency exposure in European Euro primarily relative to Russian Rubles and U.S. Dollars for $21 million . The following table presents the impact and respective location of derivative activities on the Consolidated Statements of Earnings (in millions): Twelve Months Ended December 31, Location 2015 2014 2013 Derivative activity designated as hedging instruments: Natural gas and electricity: Amount of loss reclassified from OCI into earnings (effective portion) Cost of sales $ 10 $ — $ 1 Interest rate swaps: Amount of (gain) recognized in earnings (ineffective portion) Interest expense, net $ — $ — $ (1 ) Derivative activity not designated as hedging instruments: Natural gas and electricity: Amount of loss recognized in earnings Other expenses (income), net $ 1 $ 1 $ — Foreign currency exchange contract: Amount of (gain) loss recognized in earnings (a) Other expenses (income), net $ (6 ) $ 1 $ 12 (a) (Gains) / losses related to foreign currency derivatives were substantially offset by net revaluation impacts on foreign denominated balance sheet exposures, which were also recorded in Other (income) expenses, net. Cash Flow Hedges The Company uses forward and swap contracts, which qualify as cash flow hedges, to manage forecasted exposure to natural gas and electricity prices. The effective portion of the change in the fair value of cash flow hedges is deferred in accumulated OCI on the Consolidated Balance Sheets and is subsequently recognized in cost of sales on the Consolidated Statements of Earnings for commodity hedges, when the hedged item impacts earnings. Changes in the fair value of derivative assets and liabilities designated as hedging instruments are shown in other within operating activities on the Consolidated Statements of Cash Flows. Any portion of the change in fair value of derivatives designated as hedging instruments that is determined to be ineffective is recorded in other expenses (income), net on the Consolidated Statements of Earnings. The Company currently has natural gas derivatives designated as hedging instruments that mature within 15 months . The Company’s policy for natural gas exposures is to hedge up to 75 percent of its total forecasted exposures for the next two months, up to 60 percent of its total forecasted exposures for the following four months, and lesser amounts for the remaining periods. The Company's policy for electricity exposures is to hedge up to 75 percent of its total forecasted exposures for the current calendar year and up to 65 percent of its total forecasted exposures for the first calendar year forward. Based on market conditions, approved variation from the standard policy may occur. The Company performs an analysis for effectiveness of its derivatives designated as hedging instruments at the end of each quarter based on the terms of the contract and the underlying item being hedged. As of December 31, 2015 , $6 million of loss included in OCI on the Consolidated Balance Sheets relate to contracts that will impact earnings during the next 12 months. Transactions and events that are expected to occur over the next 12 months that will necessitate recognizing these deferred gains include the recognition of the hedged item through earnings. Fair Value Hedges The Company manages its interest rate exposure by balancing the mix of its fixed and variable rate instruments at certain times through interest rate swaps. The swaps are carried at fair value and recorded as other assets or liabilities, with the offset to long-term debt on the Consolidated Balance Sheets. Changes in the fair value of these swaps and that of the related debt are recorded in interest expense, net on the Consolidated Statements of Earnings. Net Investment Hedges During the first quarter of 2015, the Company entered into cross currency forward contracts to hedge a portion of the net investment in foreign subsidiaries against fluctuations in foreign exchange rates. For derivative instruments that are designated and qualify as hedges of net investments in foreign operations, settlements and changes in fair values of the derivative instruments are recognized in Currency translation adjustment, a component of Accumulated OCI, to offset the changes in the values of the net investments being hedged. Any portion of net investment hedges that is determined to be ineffective is recorded in Other expenses (income), net on the Consolidated Statements of Earnings. 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. Gains and losses resulting from the changes in fair value of these instruments are recorded in other expenses (income), net on the Consolidated Statements of Earnings.

GOODWILL AND OTHER INTANGIBLE A

GOODWILL AND OTHER INTANGIBLE ASSETS	12 Months Ended
	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND OTHER INTANGIBLE ASSETS	GOODWILL AND OTHER INTANGIBLE ASSETS Intangible assets and goodwill consist of the following (in millions): December 31, 2015 Weighted Average Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount Amortizable intangible assets: Customer relationships 20 $ 172 $ (82 ) $ 90 Technology 21 193 (93 ) 100 Franchise and other agreements 10 43 (20 ) 23 Indefinite-lived intangible assets: Trademarks 786 — 786 Total intangible assets $ 1,194 $ (195 ) $ 999 Goodwill $ 1,167 December 31, 2014 Weighted Average Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount Amortizable intangible assets: Customer relationships 19 $ 172 $ (72 ) $ 100 Technology 20 193 (83 ) 110 Franchise and other agreements 12 39 (18 ) 21 Indefinite-lived intangible assets: Trademarks 786 — 786 Total intangible assets $ 1,190 $ (173 ) $ 1,017 Goodwill $ 1,168 The changes in the gross carrying amount of amortizable intangible assets by asset group are as follows (in millions): Customer Relationships Technology Franchise and Other Agreements Trademarks Total Balance at December 31, 2014 $ 172 $ 193 $ 39 $ 786 $ 1,190 Additional franchises and agreements — — 4 — 4 Balance at December 31, 2015 $ 172 $ 193 $ 43 $ 786 $ 1,194 The changes in the net carrying amount of goodwill by segment are as follows (in millions): Composites Insulation Roofing Total Balance at December 31, 2014 $ 57 $ 888 $ 223 $ 1,168 Foreign currency translation (1 ) — — (1 ) Balance at December 31, 2015 $ 56 $ 888 $ 223 $ 1,167 Other Intangible Assets The Company amortizes the cost of other intangible assets over their estimated useful lives which, individually, range up to twenty-five years. The Company expects the ongoing amortization expense for amortizable intangible assets to be $22 million in each of the next five fiscal 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. These costs are reported in Other expenses (income), net on the Consolidated Statements of Earnings. Goodwill and Indefinite-Lived Intangible Assets The Company tests goodwill and indefinite-lived intangible assets for impairment as of October 1 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 amount. The annual test performed in 2015 resulted in no impairment of goodwill.

PROPERTY, PLANT AND EQUIPMENT

PROPERTY, PLANT AND EQUIPMENT	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
PROPERTY, PLANT AND EQUIPMENT	PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment consist of the following (in millions): December 31, 2015 December 31, 2014 Land $ 186 $ 196 Buildings and leasehold improvements 788 789 Machinery and equipment 3,478 3,405 Construction in progress 359 233 4,811 4,623 Accumulated depreciation (1,855 ) (1,724 ) Property, plant and equipment, net $ 2,956 $ 2,899 Machinery and equipment includes certain precious metals used in the Company’s production tooling, which comprise approximately 15 percent of total machinery and equipment as of December 31, 2015 and December 31, 2014 , respectively. Precious metals used in our production tooling are depleted as they are consumed during the production process, which typically represents an annual expense of less than 3 percent of the outstanding carrying value.

OPERATING LEASES

OPERATING LEASES	12 Months Ended
	Dec. 31, 2015
Leases [Abstract]
OPERATING LEASES	OPERATING LEASES The Company leases certain equipment and facilities under operating leases expiring on various dates through 2025. Some of these leases include cost-escalation clauses. Such cost-escalation clauses are recognized on a straight-line basis over the lease term. Total rental expense was $88 million , $91 million and $83 million in the years ended December 31, 2015 , 2014 and 2013 , respectively. At December 31, 2015 , the minimum future rental commitments under non-cancelable operating leases with initial maturities greater than one year payable over the remaining lives of the leases are (in millions): Period Minimum Future Rental Commitments 2016 $ 58 2017 $ 45 2018 $ 31 2019 $ 24 2020 $ 15 2021 and beyond $ 43

ACCOUNTS PAYABLE AND ACCRUED LI

ACCOUNTS PAYABLE AND ACCRUED LIABILITIES	12 Months Ended
	Dec. 31, 2015
Payables and Accruals [Abstract]
ACCOUNTS PAYABLE AND ACCRUED LIABILITIES	ACCOUNTS PAYABLE AND ACCRUED LIABILITIES Accounts payable and accrued liabilities consist of the following (in millions): December 31, 2015 2014 Accounts payable $ 535 $ 542 Payroll, vacation pay and incentive compensation 153 112 Payroll, property and other taxes 110 93 Other employee benefits liabilities 38 38 Dividends payable 21 19 Warranties (current portion) 14 17 Deferred revenue 9 20 Legal and audit fees 7 8 Accrued interest 7 9 Charges related to cost reduction actions 7 36 Other 47 55 Total $ 948 $ 949

WARRANTIES

WARRANTIES	12 Months Ended
	Dec. 31, 2015
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. A reconciliation of the warranty liability is as follows (in millions): December 31, 2015 2014 Beginning balance $ 40 $ 41 Amounts accrued for current year 15 25 Settlements of warranty claims (12 ) (26 ) Ending balance $ 43 $ 40

COST REDUCTION ACTIONS

COST REDUCTION ACTIONS	12 Months Ended
	Dec. 31, 2015
Restructuring and Related Activities [Abstract]
COST REDUCTION ACTIONS	COST REDUCTION ACTIONS 2014 Cost Reduction Actions During 2014, the Company took actions to reduce costs throughout its global Composites network, mainly through the decisions to close a facility in Japan and optimize a facility in Canada, in addition to other cost reduction actions. The Company also took actions in 2014 to streamline its management structure and reduce costs, resulting in the elimination of the Building Materials Group organizational structure. For the year-to-date 2015, the Company recorded $6 million of net benefit in charges related to cost reduction actions, comprised of a $3 million benefit from the revision of estimated total severance costs of these actions, and $3 million of net gains related to pension curtailment and settlement. For the year-to-date 2015, the Company also recorded $8 million of net charges in other items related to cost reduction actions, primarily comprised of facility closure costs in Japan. The following table summarizes the status of the unpaid liabilities from the Company’s 2014 cost reduction actions (in millions): Beginning Balance December 31, 2014 Costs Incurred Payments Foreign Currency Translation Non-cash Adjustments Ending Balance December 31, 2015 Cumulative Charges Incurred Severance $ 31 $ (3 ) $ 21 $ (1 ) $ — $ 6 $ 33 Contract Termination 3 — 2 — — 1 3 Pension Curtailment and Settlement — (3 ) — — 3 — (3 ) Total $ 34 $ (6 ) $ 23 $ (1 ) $ 3 $ 7 $ 33 The Company expects the unpaid balance of these severance and contract termination charges to be paid over the next year.

DEBT

DEBT	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
DEBT	DEBT Details of the Company’s outstanding long-term debt are as follows (in millions): December 31, 2015 December 31, 2014 6.50% senior notes, net of discount and financing fees, due 2016 $ 158 $ 158 9.00% senior notes, net of discount and financing fees, due 2019 143 142 4.20% senior notes, net of discount and financing fees, due 2022 596 596 4.20% senior notes, net of discount and financing fees, due 2024 390 388 7.00% senior notes, net of discount and financing fees, due 2036 536 536 Accounts receivable securitization facility, maturing in 2018 — 106 Various capital leases, due through and beyond 2050 36 47 Fair value adjustment to debt 6 8 Total long-term debt 1,865 1,981 Less – current portion 163 3 Long-term debt, net of current portion $ 1,702 $ 1,978 Senior Notes During the fourth quarter of 2015, the Company retrospectively adopted FASB ASU 2015-03 related to simplifying the presentation of debt issuance costs. Please refer to the accounting pronouncements section of Note 1 for additional detail on this accounting standard. As of December 31, 2015 and 2014, the Company reclassified $12 million and $13 million , respectively, in unamortized debt issuance costs on the Consolidated Balance Sheets from Other non-current assets to Long-term debt, net of current portion. Accordingly, this balance was allocated to reduce the principal amounts of the related debt in the table above. The Company issued $400 million of 2024 senior notes on November 12, 2014 at 4.20% . The Company paid $4 million in loan costs in connection with the 2024 notes. These costs were deferred and are being amortized over the term of the 2024 notes. Interest on the notes is payable semiannually in arrears on June 1 and December 1 each year, beginning on June 1, 2015. The proceeds of the 2024 notes were used to repay $242 million of our 2016 senior notes at an average price equal to 111.46% of the principal amount, together with accrued interest of $7 million . In addition, the Company repaid $105 million of our 2019 senior notes at an average price equal to 122.98% of the principal amount, together with accrued interest of $4 million . The cash premium paid totaled $52 million and is included in Payments on long-term debt in the Consolidated Statements of Cash Flows. Unamortized discounts and fees of $2 million along with tender fees of $1 million were recorded in loss on extinguishment of debt in the Consolidated Statements of Earnings. The remaining funds were used to pay down our Senior Revolving Credit Facility, finance general working capital needs, and for general corporate purposes. The Company issued $600 million of 2022 senior notes on October 17, 2012. The proceeds of these notes were used to refinance $250 million of our 2016 senior notes, $100 million of our 2019 senior notes and pay down our Senior Revolving Credit Facility. Interest on the notes is payable semiannually in arrears on June 15 and December 15 each year, beginning on June 15, 2013. The Company issued $350 million of 2019 senior notes on June 3, 2009. On October 31, 2006, the Company issued $650 million of 2016 senior notes and $540 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. As of December 31, 2015, the $158 million in outstanding principal related to the 2016 senior notes was recorded in Long-term debt - current portion, along with with $2 million net in associated unamortized financing fees, discount, and interest rate swap basis adjustment. Collectively, the 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 Senior Notes are fully and unconditionally guaranteed by each of the Company’s current and future domestic subsidiaries that are a borrower or guarantor under the Company’s Credit Agreement (as defined below). The guarantees are unsecured and rank equally in right of payment with all other existing and future senior unsecured indebtedness of the guarantors. The guarantees are effectively subordinated to existing and future secured debt of the guarantors to the extent of the assets securing that indebtedness. 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 December 31, 2015 . In the fourth quarter of 2011, the Company terminated all interest rate swaps designated to hedge a portion of the 6.5% senior notes due 2016. The swaps were carried at fair value and recorded as other assets or liabilities, with a fair value adjustment to long-term debt on the Consolidated Balance Sheets. The fair value adjustment to debt will be amortized through 2016 as a reduction to interest expense in conjunction with the maturity date of the notes. On June 28, 2013, the Company entered into interest rate swap agreements effective July 1, 2013 to manage its interest rate exposure by swapping $100 million of fixed rate to variable rate exposure designated against our 4.2% senior notes due 2022. The swaps are carried at fair value and recorded as other assets or liabilities, with a fair value adjustment to long-term debt on the Consolidated Balance Sheets. Senior Credit Facilities The Company amended its $800 million multi-currency senior revolving credit facility in November 2015 to extend its maturity to November 2020 and increase the uncommitted incremental loans permitted under the facility from $200 million to $600 million . The Senior Revolving Credit Facility 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 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 December 31, 2015 . As of December 31, 2015, the Company had no borrowings on its senior revolving credit facility, $9 million of outstanding letters of credit, and had $791 million available on the facility. Receivables Securitization Facility Included in long-term debt on the Consolidated Balance Sheets are amounts outstanding under a Receivables Purchase Agreement (the “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 $250 million RPA with certain financial institutions. The securitization facility was amended in January of 2015 to extend its maturity to January 2018. As of December 31, 2015, the Company had no borrowings on its receivables securitization facility, $2 million of outstanding letters of credit, and had $228 million available on the facility due to collateral capacity limits. The RPA 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 December 31, 2015 . 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 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. Capital Leases In the second quarter of 2015 the Company purchased its World Headquarters facility which had previously been classified as a capital lease. As a result, the Company reduced its capital lease obligation by $10 million and recorded a $5 million gain on extinguishment of debt in the second quarter of 2015. Debt Maturities The aggregate maturities for all long-term debt issues for each of the five years following December 31, 2015 and thereafter are presented in the table below (in millions). The maturities are stated at total cash the Company is contractually obligated to pay third parties and are not stated net of discount or financing fees. The effects of the interest rate swap are not included in the table below. Period Maturities 2016 $ 164 2017 6 2018 6 2019 150 2020 6 2021 and beyond 1,572 Total $ 1,904 Short-Term Debt At December 31, 2015 and December 31, 2014 , short-term borrowings were $6 million and $31 million , 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 4.5% for December 31, 2015 and 7.2% for December 31, 2014 .

PENSION PLANS

PENSION PLANS	12 Months Ended
	Dec. 31, 2015
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
PENSION PLANS	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 U.S. plan, the unrecognized cost of any retroactive amendments and actuarial gains and losses are amortized over the average remaining life expectancy of inactive participants. In all of 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. As of December 31, 2014, the projected benefit obligation and plan assets for Non-U.S. plans were revised to reflect a previously omitted defined benefit obligation. The effect of this revision on the December 31, 2014 disclosures was a $7 million increase to projected benefit obligation and a $7 million increase to plan assets. There was no change to the funded status or Consolidated Balance Sheets as of December 31, 2014. The following tables provide a reconciliation of the change in the projected benefit obligation, the change in plan assets and the net amount recognized in the Consolidated Balance Sheets for the years ended December 31, 2015 and 2014 (in millions): December 31, 2015 December 31, 2014 U.S. Non-U.S. Total U.S. Non-U.S. Total Change in Projected Benefit Obligation Benefit obligation at beginning of period $ 1,193 $ 571 $ 1,764 $ 1,070 $ 546 $ 1,616 Service cost 8 4 12 8 5 13 Interest cost 44 19 63 48 23 71 Actuarial (gain) loss (50 ) (19 ) (69 ) 159 63 222 Currency (gain) — (55 ) (55 ) — (44 ) (44 ) Benefits paid (101 ) (21 ) (122 ) (92 ) (23 ) (115 ) Settlements / Curtailments — (7 ) (7 ) — (2 ) (2 ) Other (2 ) (7 ) (9 ) — 3 3 Benefit obligation at end of period $ 1,092 $ 485 $ 1,577 $ 1,193 $ 571 $ 1,764 December 31, 2015 December 31, 2014 U.S. Non-U.S. Total U.S. Non-U.S. Total Change in Plan Assets Fair value of assets at beginning of period $ 883 $ 437 $ 1,320 $ 858 $ 422 $ 1,280 Actual return on plan assets (23 ) 2 (21 ) 82 50 132 Currency (loss) — (46 ) (46 ) — (35 ) (35 ) Company contributions 47 13 60 36 16 52 Benefits paid (101 ) (21 ) (122 ) (92 ) (23 ) (115 ) Settlements/curtailments — (7 ) (7 ) — (2 ) (2 ) Other — 1 1 (1 ) 9 8 Fair value of assets at end of period $ 806 $ 379 $ 1,185 $ 883 $ 437 $ 1,320 Funded status $ (286 ) $ (106 ) $ (392 ) $ (310 ) $ (134 ) $ (444 ) December 31, 2015 December 31, 2014 U.S. Non-U.S. Total U.S. Non-U.S. Total Amounts Recognized in the Consolidated Balance Sheets Prepaid pension cost $ — $ 6 $ 6 $ — $ 5 $ 5 Accrued pension cost – current — (1 ) (1 ) (1 ) (1 ) (2 ) Accrued pension cost – non-current (286 ) (111 ) (397 ) (309 ) (138 ) (447 ) Net amount recognized $ (286 ) $ (106 ) $ (392 ) $ (310 ) $ (134 ) $ (444 ) Amounts Recorded in Accumulated OCI Net actuarial loss $ (431 ) $ (96 ) $ (527 ) $ (415 ) $ (107 ) $ (522 ) The following table presents information about the projected benefit obligation, accumulated benefit obligation (“ABO”) and plan assets of the Company’s pension plans (in millions): December 31, 2015 December 31, 2014 U.S. Non-U.S. Total U.S. Non-U.S. Total Plans with ABO in excess of fair value of plan assets: Projected benefit obligation $ 1,092 $ 314 $ 1,406 $ 1,193 $ 464 $ 1,657 Accumulated benefit obligation $ 1,092 $ 311 $ 1,403 $ 1,193 $ 448 $ 1,641 Fair value of plan assets $ 806 $ 206 $ 1,012 $ 883 $ 328 $ 1,211 Plans with fair value of assets in excess of ABO: Projected benefit obligation $ — $ 171 $ 171 $ — $ 107 $ 107 Accumulated benefit obligation $ — $ 156 $ 156 $ — $ 99 $ 99 Fair value of plan assets $ — $ 173 $ 173 $ — $ 109 $ 109 Total projected benefit obligation $ 1,092 $ 485 $ 1,577 $ 1,193 $ 571 $ 1,764 Total accumulated benefit obligation $ 1,092 $ 467 $ 1,559 $ 1,193 $ 547 $ 1,740 Total plan assets $ 806 $ 379 $ 1,185 $ 883 $ 437 $ 1,320 Weighted-Average Assumptions Used to Determine Benefit Obligation The following table presents weighted average assumptions used to determine benefit obligations at the measurement dates noted: December 31, 2015 2014 United States Plans Discount rate 4.20 % 3.85 % Expected return on plan assets 7.00 % 7.00 % Non-United States Plans Discount rate 3.88 % 3.60 % Expected return on plan assets 6.23 % 6.27 % Rate of compensation increase 3.97 % 4.01 % Components of Net Periodic Pension Cost The following table presents the components of net periodic pension cost for the periods noted (in millions): Twelve Months Ended December 31, 2015 2014 2013 Service cost $ 12 $ 13 $ 15 Interest cost 63 71 65 Expected return on plan assets (84 ) (84 ) (84 ) Amortization of actuarial loss 18 11 20 Settlement/curtailment (3 ) — — Other 1 — — Net periodic benefit cost $ 7 $ 11 $ 16 Weighted-Average Assumptions Used to Determine Net Periodic Pension Cost The following table presents weighted-average assumptions used to determine net periodic pension costs for the periods noted: Twelve Months Ended December 31, 2015 2014 2013 United States Plans Discount rate 3.85 % 4.65 % 3.80 % Expected return on plan assets 7.00 % 7.00 % 7.50 % Rate of compensation increase N/A (a) N/A (a) N/A (a) Non-United States Plans Discount rate 3.60 % 4.45 % 4.10 % Expected return on plan assets 6.27 % 6.38 % 6.13 % Rate of compensation increase 4.01 % 3.94 % 3.50 % (a) Not applicable due to changes in plan made on August 1, 2009 that were effective beginning January 1, 2010. The expected return on plan assets assumption is derived by taking into consideration the target plan asset allocation, historical rates of return on those assets, projected future asset class returns and net outperformance of the market by active investment managers. An asset return model is used to develop an expected range of returns on plan investments over a 20 year period, with the expected rate of return selected from a best estimate range within the total range of projected results. The result is then rounded down to the nearest 25 basis points. Accumulated Other Comprehensive Earnings (Deficit) Of the $(527) million balance in OCI, $16 million is expected to be recognized as net periodic pension cost during 2016 . Items Measured at Fair Value The Company classifies and discloses pension plan assets in one of the following three categories: Level 1: Quoted market prices in active markets for identical assets. Level 2: Observable market based inputs or unobservable inputs that are corroborated by market data. Level 3: Unobservable inputs that are not corroborated by market data. Plan Assets The following table summarizes the fair values, and levels within the fair value hierarchy in which the fair value measurements fall under United States pension plan assets at December 31, 2015 and 2014 (in millions): 2015 Asset Category Level 1 Level 2 Level 3 Total Equity Domestic actively managed $ 85 $ 36 $ — $ 121 Domestic passive index — 51 — 51 International actively managed 79 31 — 110 International passive index — 23 — 23 Fixed income and cash equivalents Cash 1 — — 1 Short-term debt — 33 — 33 Corporate bonds 204 52 — 256 Government debt 88 — — 88 Real estate investment trusts 25 — — 25 Absolute return strategies — 52 — 52 Real assets — 46 — 46 Total United States plan assets $ 482 $ 324 $ — $ 806 2014 Asset Category Level 1 Level 2 Level 3 Total Equity Domestic actively managed $ 99 $ 39 $ — $ 138 Domestic passive index — 61 — 61 International actively managed 81 34 — 115 International passive index — 26 — 26 Fixed income and cash equivalents Cash 2 — — 2 Short-term debt — 26 — 26 Corporate bonds 229 55 — 284 Government debt 98 — — 98 Real estate investment trusts 28 — — 28 Absolute return strategies — 55 — 55 Real assets — 50 — 50 Total United States plan assets $ 537 $ 346 $ — $ 883 The following table summarizes the fair values, and levels within the fair value hierarchy in which the fair value measurements fall under non-United States pension plan assets at December 31, 2015 and 2014 (in millions): 2015 Asset Category Level 1 Level 2 Level 3 Total Equity Domestic actively managed $ — $ 24 $ — $ 24 Domestic passive index — 1 — 1 International actively managed 39 23 — 62 International passive index — 25 — 25 Fixed income and cash equivalents Cash and cash equivalents 2 24 — 26 Corporate bonds — 149 — 149 Government Debt — — — — Absolute return strategies — 92 — 92 Total non-United States plan assets $ 41 $ 338 $ — $ 379 2014 Asset Category Level 1 Level 2 Level 3 Total Equity Domestic actively managed $ — $ 30 $ — $ 30 Domestic passive index — — — — International actively managed — 52 — 52 International passive index — 35 — 35 Fixed income and cash equivalents Cash and cash equivalents — 29 — 29 Corporate bonds — 198 — 198 Government Debt — — — — Absolute return strategies — 93 — 93 Total non-United States plan assets $ — $ 437 $ — $ 437 Investment Strategy The current investment policy for the United States pension plan is to have 38% of assets invested in equities, 3% in real estate, 6% in real assets, 47% in intermediate and long-term fixed income securities and 6% in absolute return strategies. Assets are rebalanced quarterly to conform to policy tolerances. The Company actively evaluates the reasonableness of its asset mix given changes in the projected benefit obligation and market dynamics. Estimated Future Benefit Payments The following table shows estimated future benefit payments from the Company’s pension plans (in millions): Year Estimated Benefit Payments 2016 $ 98 2017 $ 97 2018 $ 95 2019 $ 97 2020 $ 98 2021-2024 $ 476 Contributions Owens Corning expects to contribute $50 million in cash to the United States pension plan during 2016 and another $13 million to non-United States plans. Actual contributions to the plans may change as a result of a variety of factors, including changes in laws that impact funding requirements. Defined Contribution Plans The Company sponsors two defined contribution plans which are available to substantially all United States employees. The Company matches a percentage of employee contributions up to a maximum level and contributes 2% of an employee’s wages regardless of employee contributions. The Company recognized expense of $33 million , $34 million and $29 million during the years ended December 31, 2015 , 2014 and 2013 , respectively, related to these plans. POSTEMPLOYMENT AND POSTRETIREMENT BENEFITS OTHER THAN PENSIONS The Company maintains health care 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. Employees hired on or before December 31, 2005 become eligible to participate in the United States health care plans upon retirement if they have accumulated 10 years of service after age 45 , 48 or 50 , depending on the category of employee. For employees hired after December 31, 2005, the Company does not provide subsidized retiree health care. Some of the plans are contributory, with some retiree contributions adjusted annually. The Company has reserved the right to change or eliminate these benefit plans subject to the terms of collective bargaining agreements. The Company implemented an Employee Group Waiver Plan ("EGWP") effective January 1, 2013 to manage its prescription drug benefits for certain retiree groups. The Company also negotiated with certain unionized employees to increase the eligibility age for retiree medical benefits and to eliminate the post- 65 retiree reimbursement account benefit for employees retiring on or after January 1, 2014. The following table provides a reconciliation of the change in the projected benefit obligation and the net amount recognized in the Consolidated Balance Sheets for the years ended December 31, 2015 and 2014 (in millions): December 31, 2015 December 31, 2014 U.S. Non-U.S. Total U.S. Non-U.S. Total Change in Projected Benefit Obligation Benefit obligation at beginning of period $ 238 $ 16 $ 254 $ 228 $ 16 $ 244 Service cost 2 — 2 2 — 2 Interest cost 8 1 9 9 1 10 Actuarial (gain) loss (3 ) — (3 ) 17 — 17 Currency (gain) — (2 ) (2 ) — (1 ) (1 ) Plan amendments — — — — — — Benefits paid (15 ) (1 ) (16 ) (18 ) (1 ) (19 ) Other — (1 ) (1 ) — 1 1 Benefit obligation at end of period $ 230 $ 13 $ 243 $ 238 $ 16 $ 254 Funded status $ (230 ) $ (13 ) $ (243 ) $ (238 ) $ (16 ) $ (254 ) Amounts Recognized in the Consolidated Balance Sheets Accrued benefit obligation – current $ (17 ) $ (1 ) $ (18 ) $ (18 ) $ (1 ) $ (19 ) Accrued benefit obligation – non-current (213 ) (12 ) (225 ) (220 ) (15 ) (235 ) Net amount recognized $ (230 ) $ (13 ) $ (243 ) $ (238 ) $ (16 ) $ (254 ) Amounts Recorded in Accumulated OCI Net actuarial gain $ (4 ) $ (4 ) $ (8 ) $ (20 ) $ — $ (20 ) Net prior service credit (17 ) — (17 ) (2 ) (5 ) (7 ) Net amount recognized $ (21 ) $ (4 ) $ (25 ) $ (22 ) $ (5 ) $ (27 ) Weighted-Average Assumptions Used to Determine Benefit Obligations The following table presents the discount rates used to determine the benefit obligations: December 31, 2015 2014 United States plans 4.00 % 3.70 % Non-United States plans 3.80 % 3.70 % Components of Net Periodic Postretirement Benefit Cost The following table presents the components of net periodic postretirement benefit cost (in millions): Twelve Months Ended December 31, 2015 2014 2013 Service cost $ 2 $ 2 $ 3 Interest cost 9 10 9 Amortization of prior service cost (4 ) (4 ) (4 ) Amortization of actuarial gain (1 ) (2 ) (1 ) Other 1 — — Net periodic postretirement benefit cost $ 7 $ 6 $ 7 Weighted-Average Assumptions Used to Determine Net Periodic Postretirement Benefit Cost The following table presents the discount rates used to determine net periodic postretirement benefit cost: Twelve Months Ended December 31, 2015 2014 2013 United States plans 3.70 % 4.35 % 3.50 % Non-United States plans 3.70 % 4.45 % 3.80 % The following table presents health care cost trend rates used to determine net periodic postretirement benefit cost, as well as information regarding the ultimate rate and the year in which their ultimate rate is reached: Twelve Months Ended December 31, 2015 2014 2013 United States plans Initial rate at end of year 7.00 % 7.00 % 7.00 % Ultimate rate 5.00 % 5.00 % 5.00 % Year in which ultimate rate is reached 2025 2024 2023 Non-United States plans Initial rate at end of year 5.25 % 5.43 % 6.23 % Ultimate rate 4.70 % 4.70 % 4.79 % Year in which ultimate rate is reached 2019 2019 2019 The health care cost trend rate assumption can have a significant effect on the amounts reported. To illustrate, a one-percentage point change in the December 31, 2015 assumed health care cost trend rate would have the following effects (in millions): 1-Percentage Point Increase Decrease Increase (decrease) in total service cost and interest cost components of net periodic postretirement benefit cost $ — $ — Increase (decrease) of accumulated postretirement benefit obligation $ 9 $ (8 ) Accumulated Other Comprehensive Earnings (Deficit) Approximately $4 million of the $25 million balance in accumulated OCI is expected to be recognized as net periodic postretirement benefit during 2016. Estimated Future Benefit Payments The following table shows estimated future benefit payments from the Company’s postretirement benefit plans (in millions): Year Estimated Benefit Payments 2016 $ 19 2017 $ 19 2018 $ 20 2019 $ 19 2020 $ 19 2021-2025 $ 88 Postemployment Benefits The Company may also provide benefits to former or inactive employees after employment but before retirement under certain conditions. These benefits include continuation of benefits such as health care and life insurance coverage. The accrued postemployment benefits liability at December 31, 2015 and 2014 was $15 million and $17 million , respectively. The net periodic postemployment benefit expense was $1 million for each of the years ended December 31, 2015 , 2014 and 2013 .

POSTEMPLOYMENT AND POSTRETIREME

POSTEMPLOYMENT AND POSTRETIREMENT BENEFITS OTHER THAN PENSIONS	12 Months Ended
	Dec. 31, 2015
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
POSTEMPLOYMENT AND POSTRETIREMENT BENEFITS OTHER THAN PENSIONS	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 U.S. plan, the unrecognized cost of any retroactive amendments and actuarial gains and losses are amortized over the average remaining life expectancy of inactive participants. In all of 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. As of December 31, 2014, the projected benefit obligation and plan assets for Non-U.S. plans were revised to reflect a previously omitted defined benefit obligation. The effect of this revision on the December 31, 2014 disclosures was a $7 million increase to projected benefit obligation and a $7 million increase to plan assets. There was no change to the funded status or Consolidated Balance Sheets as of December 31, 2014. The following tables provide a reconciliation of the change in the projected benefit obligation, the change in plan assets and the net amount recognized in the Consolidated Balance Sheets for the years ended December 31, 2015 and 2014 (in millions): December 31, 2015 December 31, 2014 U.S. Non-U.S. Total U.S. Non-U.S. Total Change in Projected Benefit Obligation Benefit obligation at beginning of period $ 1,193 $ 571 $ 1,764 $ 1,070 $ 546 $ 1,616 Service cost 8 4 12 8 5 13 Interest cost 44 19 63 48 23 71 Actuarial (gain) loss (50 ) (19 ) (69 ) 159 63 222 Currency (gain) — (55 ) (55 ) — (44 ) (44 ) Benefits paid (101 ) (21 ) (122 ) (92 ) (23 ) (115 ) Settlements / Curtailments — (7 ) (7 ) — (2 ) (2 ) Other (2 ) (7 ) (9 ) — 3 3 Benefit obligation at end of period $ 1,092 $ 485 $ 1,577 $ 1,193 $ 571 $ 1,764 December 31, 2015 December 31, 2014 U.S. Non-U.S. Total U.S. Non-U.S. Total Change in Plan Assets Fair value of assets at beginning of period $ 883 $ 437 $ 1,320 $ 858 $ 422 $ 1,280 Actual return on plan assets (23 ) 2 (21 ) 82 50 132 Currency (loss) — (46 ) (46 ) — (35 ) (35 ) Company contributions 47 13 60 36 16 52 Benefits paid (101 ) (21 ) (122 ) (92 ) (23 ) (115 ) Settlements/curtailments — (7 ) (7 ) — (2 ) (2 ) Other — 1 1 (1 ) 9 8 Fair value of assets at end of period $ 806 $ 379 $ 1,185 $ 883 $ 437 $ 1,320 Funded status $ (286 ) $ (106 ) $ (392 ) $ (310 ) $ (134 ) $ (444 ) December 31, 2015 December 31, 2014 U.S. Non-U.S. Total U.S. Non-U.S. Total Amounts Recognized in the Consolidated Balance Sheets Prepaid pension cost $ — $ 6 $ 6 $ — $ 5 $ 5 Accrued pension cost – current — (1 ) (1 ) (1 ) (1 ) (2 ) Accrued pension cost – non-current (286 ) (111 ) (397 ) (309 ) (138 ) (447 ) Net amount recognized $ (286 ) $ (106 ) $ (392 ) $ (310 ) $ (134 ) $ (444 ) Amounts Recorded in Accumulated OCI Net actuarial loss $ (431 ) $ (96 ) $ (527 ) $ (415 ) $ (107 ) $ (522 ) The following table presents information about the projected benefit obligation, accumulated benefit obligation (“ABO”) and plan assets of the Company’s pension plans (in millions): December 31, 2015 December 31, 2014 U.S. Non-U.S. Total U.S. Non-U.S. Total Plans with ABO in excess of fair value of plan assets: Projected benefit obligation $ 1,092 $ 314 $ 1,406 $ 1,193 $ 464 $ 1,657 Accumulated benefit obligation $ 1,092 $ 311 $ 1,403 $ 1,193 $ 448 $ 1,641 Fair value of plan assets $ 806 $ 206 $ 1,012 $ 883 $ 328 $ 1,211 Plans with fair value of assets in excess of ABO: Projected benefit obligation $ — $ 171 $ 171 $ — $ 107 $ 107 Accumulated benefit obligation $ — $ 156 $ 156 $ — $ 99 $ 99 Fair value of plan assets $ — $ 173 $ 173 $ — $ 109 $ 109 Total projected benefit obligation $ 1,092 $ 485 $ 1,577 $ 1,193 $ 571 $ 1,764 Total accumulated benefit obligation $ 1,092 $ 467 $ 1,559 $ 1,193 $ 547 $ 1,740 Total plan assets $ 806 $ 379 $ 1,185 $ 883 $ 437 $ 1,320 Weighted-Average Assumptions Used to Determine Benefit Obligation The following table presents weighted average assumptions used to determine benefit obligations at the measurement dates noted: December 31, 2015 2014 United States Plans Discount rate 4.20 % 3.85 % Expected return on plan assets 7.00 % 7.00 % Non-United States Plans Discount rate 3.88 % 3.60 % Expected return on plan assets 6.23 % 6.27 % Rate of compensation increase 3.97 % 4.01 % Components of Net Periodic Pension Cost The following table presents the components of net periodic pension cost for the periods noted (in millions): Twelve Months Ended December 31, 2015 2014 2013 Service cost $ 12 $ 13 $ 15 Interest cost 63 71 65 Expected return on plan assets (84 ) (84 ) (84 ) Amortization of actuarial loss 18 11 20 Settlement/curtailment (3 ) — — Other 1 — — Net periodic benefit cost $ 7 $ 11 $ 16 Weighted-Average Assumptions Used to Determine Net Periodic Pension Cost The following table presents weighted-average assumptions used to determine net periodic pension costs for the periods noted: Twelve Months Ended December 31, 2015 2014 2013 United States Plans Discount rate 3.85 % 4.65 % 3.80 % Expected return on plan assets 7.00 % 7.00 % 7.50 % Rate of compensation increase N/A (a) N/A (a) N/A (a) Non-United States Plans Discount rate 3.60 % 4.45 % 4.10 % Expected return on plan assets 6.27 % 6.38 % 6.13 % Rate of compensation increase 4.01 % 3.94 % 3.50 % (a) Not applicable due to changes in plan made on August 1, 2009 that were effective beginning January 1, 2010. The expected return on plan assets assumption is derived by taking into consideration the target plan asset allocation, historical rates of return on those assets, projected future asset class returns and net outperformance of the market by active investment managers. An asset return model is used to develop an expected range of returns on plan investments over a 20 year period, with the expected rate of return selected from a best estimate range within the total range of projected results. The result is then rounded down to the nearest 25 basis points. Accumulated Other Comprehensive Earnings (Deficit) Of the $(527) million balance in OCI, $16 million is expected to be recognized as net periodic pension cost during 2016 . Items Measured at Fair Value The Company classifies and discloses pension plan assets in one of the following three categories: Level 1: Quoted market prices in active markets for identical assets. Level 2: Observable market based inputs or unobservable inputs that are corroborated by market data. Level 3: Unobservable inputs that are not corroborated by market data. Plan Assets The following table summarizes the fair values, and levels within the fair value hierarchy in which the fair value measurements fall under United States pension plan assets at December 31, 2015 and 2014 (in millions): 2015 Asset Category Level 1 Level 2 Level 3 Total Equity Domestic actively managed $ 85 $ 36 $ — $ 121 Domestic passive index — 51 — 51 International actively managed 79 31 — 110 International passive index — 23 — 23 Fixed income and cash equivalents Cash 1 — — 1 Short-term debt — 33 — 33 Corporate bonds 204 52 — 256 Government debt 88 — — 88 Real estate investment trusts 25 — — 25 Absolute return strategies — 52 — 52 Real assets — 46 — 46 Total United States plan assets $ 482 $ 324 $ — $ 806 2014 Asset Category Level 1 Level 2 Level 3 Total Equity Domestic actively managed $ 99 $ 39 $ — $ 138 Domestic passive index — 61 — 61 International actively managed 81 34 — 115 International passive index — 26 — 26 Fixed income and cash equivalents Cash 2 — — 2 Short-term debt — 26 — 26 Corporate bonds 229 55 — 284 Government debt 98 — — 98 Real estate investment trusts 28 — — 28 Absolute return strategies — 55 — 55 Real assets — 50 — 50 Total United States plan assets $ 537 $ 346 $ — $ 883 The following table summarizes the fair values, and levels within the fair value hierarchy in which the fair value measurements fall under non-United States pension plan assets at December 31, 2015 and 2014 (in millions): 2015 Asset Category Level 1 Level 2 Level 3 Total Equity Domestic actively managed $ — $ 24 $ — $ 24 Domestic passive index — 1 — 1 International actively managed 39 23 — 62 International passive index — 25 — 25 Fixed income and cash equivalents Cash and cash equivalents 2 24 — 26 Corporate bonds — 149 — 149 Government Debt — — — — Absolute return strategies — 92 — 92 Total non-United States plan assets $ 41 $ 338 $ — $ 379 2014 Asset Category Level 1 Level 2 Level 3 Total Equity Domestic actively managed $ — $ 30 $ — $ 30 Domestic passive index — — — — International actively managed — 52 — 52 International passive index — 35 — 35 Fixed income and cash equivalents Cash and cash equivalents — 29 — 29 Corporate bonds — 198 — 198 Government Debt — — — — Absolute return strategies — 93 — 93 Total non-United States plan assets $ — $ 437 $ — $ 437 Investment Strategy The current investment policy for the United States pension plan is to have 38% of assets invested in equities, 3% in real estate, 6% in real assets, 47% in intermediate and long-term fixed income securities and 6% in absolute return strategies. Assets are rebalanced quarterly to conform to policy tolerances. The Company actively evaluates the reasonableness of its asset mix given changes in the projected benefit obligation and market dynamics. Estimated Future Benefit Payments The following table shows estimated future benefit payments from the Company’s pension plans (in millions): Year Estimated Benefit Payments 2016 $ 98 2017 $ 97 2018 $ 95 2019 $ 97 2020 $ 98 2021-2024 $ 476 Contributions Owens Corning expects to contribute $50 million in cash to the United States pension plan during 2016 and another $13 million to non-United States plans. Actual contributions to the plans may change as a result of a variety of factors, including changes in laws that impact funding requirements. Defined Contribution Plans The Company sponsors two defined contribution plans which are available to substantially all United States employees. The Company matches a percentage of employee contributions up to a maximum level and contributes 2% of an employee’s wages regardless of employee contributions. The Company recognized expense of $33 million , $34 million and $29 million during the years ended December 31, 2015 , 2014 and 2013 , respectively, related to these plans. POSTEMPLOYMENT AND POSTRETIREMENT BENEFITS OTHER THAN PENSIONS The Company maintains health care 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. Employees hired on or before December 31, 2005 become eligible to participate in the United States health care plans upon retirement if they have accumulated 10 years of service after age 45 , 48 or 50 , depending on the category of employee. For employees hired after December 31, 2005, the Company does not provide subsidized retiree health care. Some of the plans are contributory, with some retiree contributions adjusted annually. The Company has reserved the right to change or eliminate these benefit plans subject to the terms of collective bargaining agreements. The Company implemented an Employee Group Waiver Plan ("EGWP") effective January 1, 2013 to manage its prescription drug benefits for certain retiree groups. The Company also negotiated with certain unionized employees to increase the eligibility age for retiree medical benefits and to eliminate the post- 65 retiree reimbursement account benefit for employees retiring on or after January 1, 2014. The following table provides a reconciliation of the change in the projected benefit obligation and the net amount recognized in the Consolidated Balance Sheets for the years ended December 31, 2015 and 2014 (in millions): December 31, 2015 December 31, 2014 U.S. Non-U.S. Total U.S. Non-U.S. Total Change in Projected Benefit Obligation Benefit obligation at beginning of period $ 238 $ 16 $ 254 $ 228 $ 16 $ 244 Service cost 2 — 2 2 — 2 Interest cost 8 1 9 9 1 10 Actuarial (gain) loss (3 ) — (3 ) 17 — 17 Currency (gain) — (2 ) (2 ) — (1 ) (1 ) Plan amendments — — — — — — Benefits paid (15 ) (1 ) (16 ) (18 ) (1 ) (19 ) Other — (1 ) (1 ) — 1 1 Benefit obligation at end of period $ 230 $ 13 $ 243 $ 238 $ 16 $ 254 Funded status $ (230 ) $ (13 ) $ (243 ) $ (238 ) $ (16 ) $ (254 ) Amounts Recognized in the Consolidated Balance Sheets Accrued benefit obligation – current $ (17 ) $ (1 ) $ (18 ) $ (18 ) $ (1 ) $ (19 ) Accrued benefit obligation – non-current (213 ) (12 ) (225 ) (220 ) (15 ) (235 ) Net amount recognized $ (230 ) $ (13 ) $ (243 ) $ (238 ) $ (16 ) $ (254 ) Amounts Recorded in Accumulated OCI Net actuarial gain $ (4 ) $ (4 ) $ (8 ) $ (20 ) $ — $ (20 ) Net prior service credit (17 ) — (17 ) (2 ) (5 ) (7 ) Net amount recognized $ (21 ) $ (4 ) $ (25 ) $ (22 ) $ (5 ) $ (27 ) Weighted-Average Assumptions Used to Determine Benefit Obligations The following table presents the discount rates used to determine the benefit obligations: December 31, 2015 2014 United States plans 4.00 % 3.70 % Non-United States plans 3.80 % 3.70 % Components of Net Periodic Postretirement Benefit Cost The following table presents the components of net periodic postretirement benefit cost (in millions): Twelve Months Ended December 31, 2015 2014 2013 Service cost $ 2 $ 2 $ 3 Interest cost 9 10 9 Amortization of prior service cost (4 ) (4 ) (4 ) Amortization of actuarial gain (1 ) (2 ) (1 ) Other 1 — — Net periodic postretirement benefit cost $ 7 $ 6 $ 7 Weighted-Average Assumptions Used to Determine Net Periodic Postretirement Benefit Cost The following table presents the discount rates used to determine net periodic postretirement benefit cost: Twelve Months Ended December 31, 2015 2014 2013 United States plans 3.70 % 4.35 % 3.50 % Non-United States plans 3.70 % 4.45 % 3.80 % The following table presents health care cost trend rates used to determine net periodic postretirement benefit cost, as well as information regarding the ultimate rate and the year in which their ultimate rate is reached: Twelve Months Ended December 31, 2015 2014 2013 United States plans Initial rate at end of year 7.00 % 7.00 % 7.00 % Ultimate rate 5.00 % 5.00 % 5.00 % Year in which ultimate rate is reached 2025 2024 2023 Non-United States plans Initial rate at end of year 5.25 % 5.43 % 6.23 % Ultimate rate 4.70 % 4.70 % 4.79 % Year in which ultimate rate is reached 2019 2019 2019 The health care cost trend rate assumption can have a significant effect on the amounts reported. To illustrate, a one-percentage point change in the December 31, 2015 assumed health care cost trend rate would have the following effects (in millions): 1-Percentage Point Increase Decrease Increase (decrease) in total service cost and interest cost components of net periodic postretirement benefit cost $ — $ — Increase (decrease) of accumulated postretirement benefit obligation $ 9 $ (8 ) Accumulated Other Comprehensive Earnings (Deficit) Approximately $4 million of the $25 million balance in accumulated OCI is expected to be recognized as net periodic postretirement benefit during 2016. Estimated Future Benefit Payments The following table shows estimated future benefit payments from the Company’s postretirement benefit plans (in millions): Year Estimated Benefit Payments 2016 $ 19 2017 $ 19 2018 $ 20 2019 $ 19 2020 $ 19 2021-2025 $ 88 Postemployment Benefits The Company may also provide benefits to former or inactive employees after employment but before retirement under certain conditions. These benefits include continuation of benefits such as health care and life insurance coverage. The accrued postemployment benefits liability at December 31, 2015 and 2014 was $15 million and $17 million , respectively. The net periodic postemployment benefit expense was $1 million for each of the years ended December 31, 2015 , 2014 and 2013 .

CONTINGENT LIABILITIES AND OTHE

CONTINGENT LIABILITIES AND OTHER MATTERS	12 Months Ended
	Dec. 31, 2015
Loss Contingency [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, but could have a material adverse effect on the results of operations, cash flows or liquidity in a given quarter or year. 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 Owens Corning has established policies and procedures 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, 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 2020 Sustainability Goals require significant global reductions in energy use, water consumption, waste to landfill, and emissions of greenhouse gases, fine particulate matter and toxic air emissions. 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 ("RCRA"), 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 United States 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 December 31, 2015 , the Company was involved with a total of 19 sites worldwide, including 6 Superfund 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 and groundwater 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 December 31, 2015 , the Company had an accrual totaling $3 million , for these costs. 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.

STOCK COMPENSATION

STOCK COMPENSATION	12 Months Ended
	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
STOCK COMPENSATION	STOCK COMPENSATION 2013 Stock Plan On April 18, 2013, the Company's stockholders approved the Owens Corning 2013 Stock Plan (the "2013 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 December 31, 2015 , the number of shares remaining available under the 2013 Stock Plan for all stock awards was 2 million . 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. During 2015, no stock options were granted. During 2014, 374,500 stock options were granted with a weighted-average grant date fair value of $19.05 . Assumptions used in the Company’s Black-Scholes valuation model to estimate the grant date fair value were expected volatility of 50.9% , expected dividends of 0% , expected term of 6.25 years and a risk-free interest rate of 1.9% . During 2013, 329,800 stock options were granted with a weighted-average grant date fair value of $18.94 . Assumptions used in the Company’s Black-Scholes valuation model to estimate the grant date fair value were expected volatility of 45.3% , expected dividends of 0% , expected term of 6.26 years and a risk-free interest rate of 1.1% . During the years ended December 31, 2015 , 2014 and 2013 , the Company recognized expense of $4 million , $6 million and $5 million respectively, related to the Company’s stock options. As of December 31, 2015 there was $4 million of total unrecognized compensation cost related to stock options. That cost is expected to be recognized over a weighted-average period of 1.83 years. The total aggregate intrinsic value of options outstanding as of December 31, 2015 , 2014 , and 2013 was $31 million , $16 million and $31 million , respectively. The total aggregate intrinsic value of options exercisable as of December 31, 2015 , 2014 , and 2013 was $28 million , $15 million and $27 million , respectively. Cash received from option exercises was $21 million , $8 million and $15 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. Tax benefits realized from tax deductions associated with option exercises totaled $4 million , $2 million and $3 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. The following table summarizes the Company’s stock option activity: Twelve Months Ended December 31, 2015 Twelve Months Ended December 31, 2014 Twelve Months Ended December 31, 2013 Number of Options Weighted- Average Exercise Price Number of Options Weighted- Average Exercise Price Number of Options Weighted- Average Exercise Price Beginning Balance 2,754,895 $ 31.04 2,748,720 $ 29.55 3,025,220 $ 27.78 Granted — — 374,500 37.65 329,800 42.16 Exercised (691,375 ) 29.75 (328,875 ) 25.23 (549,800 ) 26.88 Forfeited (105,100 ) 38.09 (35,400 ) 38.09 (56,500 ) 34.58 Expired (5,100 ) 41.89 (4,050 ) 34.50 — — Ending Balance 1,953,320 $ 31.09 2,754,895 $ 31.04 2,748,720 $ 29.55 The following table summarizes information about the Company’s options outstanding and exercisable: Options Outstanding Options Exercisable Weighted-Average Number Exercisable at Dec. 31, 2015 Weighted-Average Range of Exercise Prices Options Outstanding Remaining Contractual Life Exercise Price Remaining Contractual Life Exercise Price $13.89-$42.16 1,953,320 4.37 $ 31.09 1,552,820 3.56 $ 29.20 Restricted Stock Awards and Restricted Stock Units The Company has granted restricted stock awards and restricted stock units (collectively referred to as “restricted stock”) under its stockholder approved stock plans. Compensation expense for restricted stock 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 four year vesting period. Restricted stock is subject to alternate vesting plans for death, disability, approved early retirement and involuntary termination, over various periods ending in 2015. During the years ended December 31, 2015 , 2014 and 2013 , the Company recognized expense of $17 million , $17 million and $16 million , respectively, related to the Company’s restricted stock. As of December 31, 2015 , there was $26 million of total unrecognized compensation cost related to restricted stock. That cost is expected to be recognized over a weighted-average period of 2.57 years. The total grant date fair value of shares vested during the years ended December 31, 2015 , 2014 and 2013 , was $17 million , $15 million and $16 million , respectively. A summary of the status of the Company’s plans that had restricted stock issued as of December 31, 2015 , 2014 and 2013 and changes during the twelve months ended December 31, 2015 , 2014 and 2013 are presented below: Twelve Months Ended December 31, 2015 Twelve Months Ended December 31, 2014 Twelve Months Ended December 31, 2013 Number of Shares Weighted- Average Grant Date Fair Value Number of Shares Weighted- Average Grant Date Fair Value Number of Shares Weighted- Average Grant Date Fair Value Beginning Balance 1,727,741 $ 33.58 1,735,824 $ 32.49 1,875,065 $ 27.14 Granted 625,652 39.75 522,994 36.72 512,398 41.01 Vested (504,704 ) 34.24 (459,359 ) 32.49 (573,920 ) 26.00 Forfeited (141,199 ) 38.20 (71,718 ) 37.17 (77,719 ) 34.62 Ending Balance 1,707,490 $ 35.37 1,727,741 $ 33.58 1,735,824 $ 32.49 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 the 2015 grants is contingent on meeting internal company-based metrics or an external-based stock performance metric. The amount of stock ultimately distributed from 2014 and prior grants is contingent on meeting an external based stock performance metric. In 2015, the Company granted both internal company-based and external-based metric PSUs. In 2014 and 2013, the company granted external-based metric PSU's. Internal based metrics The internal company-based metrics vest after a three -year period and are based on return on invested capital over a three -year period. The amount of stock distributed will vary from 0% to 300% of PSUs awarded depending on performance versus the 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 three-year performance period. Pro-rata vesting may be utilized in the case of death or disability, and awards if earned will be paid at the end of the three-year period. External based metrics The external-based metric vests after a three -year period. Outstanding grants issued in 2015 will be based on the Company's total stockholder return relative to the performance of the S&P Building & Construction Industry Index. Outstanding grants issued prior to 2015 are based on the Company's total stockholder return relative to the performance of the companies in the S&P 500 Index. The amount of stock distributed will vary from 0% to 200% of PSUs awarded depending on the relative stockholder return performance. For all PSUs, respectively, during the years ended December 31, 2015 , 2014 and 2013 , the Company recognized expense of $8 million , $6 million and $7 million . As of December 31, 2015 , there was $12 million of total unrecognized compensation cost related to PSUs. That cost is expected to be recognized over a weighted-average period of 1.7 years. The total grant date fair value of shares vested during the years ended December 31, 2015 , 2014 and 2013 , was $1 million , $1 million and $9 million , respectively. 2015 Grant For the 2015 grant, the fair value of external based metric PSUs was estimated at the grant date using a Monte Carlo simulation that used various assumptions that include expected volatility of 29.2% , a risk free interest rate of 1.08% and an expected term of 2.90 years. Expected volatility was based on Owens Corning's most recent 2.90 years volatility. 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. For the 2015 grant, the fair value of the internal based metric PSUs was estimated using the grant date stock price and assumed that the performance goals will be achieved. This assumption is monitored each quarter and if it becomes probable that such goals will not be achieved or will be exceeded, compensation expense recognized will be adjusted. This adjustment results in either reversing previous surplus compensation expense recognized or recognizing additional expense. 2014 Grant For the 2014 grant, the fair value of PSUs was estimated at the grant date using a Monte Carlo simulation that used various assumptions that include expected volatility of 36.0% , a risk free interest rate of 0.68% and an expected term of 2.9 years. Expected volatility was based on a benchmark study of our peers. 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. 2013 Grant For the 2013 grant, the fair value of the PSUs was estimated at the grant date using a Monte Carlo simulation that used various assumptions that include expected volatility of 36.7% , a risk free interest rate of 0.4% and an expected term of 2.9 years. Expected volatility was based on a benchmark study of our peers. 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. Twelve Months Ended December 31, 2015 Twelve Months Ended December 31, 2014 Twelve Months Ended December 31, 2013 Number of PSUs Weighted- Average Grant Date Fair Value Number of PSUs Weighted- Average Grant Date Fair Value Number of PSUs Weighted- Average Grant Date Fair Value Beginning Balance 416,250 $ 49.53 410,500 $ 53.04 412,910 $ 49.14 Granted 252,200 43.88 248,950 44.43 207,050 56.71 Vested (151,700 ) 56.71 (199,450 ) 52.11 (167,610 ) 48.61 Forfeited/canceled (85,350 ) 48.66 (43,750 ) 41.71 (41,850 ) 50.39 Ending Balance 431,400 $ 44.52 416,250 $ 49.53 410,500 $ 53.04 2013 Employee Stock Purchase Plan On April 18, 2013, the Company’s stockholders approved the Owens Corning Employee Stock Purchase Plan (“ESPP”). The 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. There were 2 million shares available for purchase under the ESPP as of its approval date. The Company recognized expense related to the ESPP of $2 million , $2 million and $1 million for the years ended December 31, 2015 , 2014 and 2013, respectively. As of December 31, 2015 , the Company had $1 million of total unrecognized compensation costs related to the ESPP. For the years ended December 31, 2015 , 2014 and 2013, our employees purchased 0.2 million shares at an average price of $32.57 , 0.2 million shares at an average price of $34.10 , and 0.1 million shares at an average price of $33.29 , respectively. Under the outstanding ESPP as of January 29, 2016 , employees have contributed $2 million to purchase shares for the current purchase period ending May 31, 2016.

ACCUMULATED OTHER COMPREHENSIVE

ACCUMULATED OTHER COMPREHENSIVE INCOME	12 Months Ended
	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
ACCUMULATED OTHER COMPREHENSIVE INCOME	ACCUMULATED OTHER COMPREHENSIVE INCOME The following table summarizes the changes in accumulated other comprehensive income (deficit) (“AOCI”) (in millions): Twelve Months Ended Twelve Months Ended Currency Translation Adjustment Beginning balance $ (132 ) $ 2 Loss on foreign currency translation (124 ) (135 ) Gain on net investment hedge 14 — Income tax expense of amount classified into AOCI (5 ) — Net loss on foreign currency translation (115 ) (135 ) Loss reclassified from AOCI to income — 1 Other comprehensive (loss), net of tax (115 ) (134 ) Ending balance $ (247 ) $ (132 ) Pension and Other Postretirement Adjustment Beginning balance $ (413 ) $ (300 ) (Gains) arising during the period (28 ) (192 ) Income tax expense of amount classified into AOCI 5 68 Net (Gains) arising during the period (23 ) (124 ) Amortization of actuarial loss (a) 17 9 Amortization of prior service gain (a) (4 ) (4 ) Settlement gain (a) (3 ) — Income tax benefit of amounts reclassified from AOCI to income (4 ) (1 ) Net amortization and gain reclassified from AOCI to net income 6 4 Translation impact on non-US. Plans 11 7 Other comprehensive income, net of tax (6 ) (113 ) Ending balance $ (419 ) $ (413 ) Deferred Gain (Loss) on Hedging Beginning balance $ (5 ) $ 1 Change in mark to market hedges (8 ) (9 ) Income tax benefit of amount classified into AOCI 3 3 Net loss on derivative instruments (5 ) (6 ) Amounts reclassified from AOCI to income (b) 10 — Income tax benefit of amounts reclassified from AOCI to income (4 ) — Net gain reclassified from AOCI to net income 6 — Other comprehensive income/(loss), net of tax 1 (6 ) Ending balance $ (4 ) $ (5 ) Total AOCI ending balance $ (670 ) $ (550 ) (a)These AOCI components are included in the computation of total Pension and OPEB expense and are recorded in cost of sales and marketing and administrative expenses. See Note 12 for additional information. (b) Amounts reclassified from gain/(loss) on cash flow hedges are reclassified from AOCI to income when the hedged item affects earnings and is recognized in cost of sales. See Note 4 for additional information.

EARNINGS PER SHARE

EARNINGS PER SHARE	12 Months Ended
	Dec. 31, 2015
Earnings Per Share [Abstract]
EARNINGS PER SHARE	EARNINGS PER SHARE The following table summarizes the number of shares outstanding as well as our basic and diluted earnings per share for the years ended December 31, 2015 , 2014 and 2013 (in millions, except per share amounts): Twelve Months Ended December 31, 2015 2014 2013 Net earnings attributable to Owens Corning $ 330 $ 226 $ 204 Weighted-average number of shares outstanding used for basic earnings per share 117.2 117.5 118.2 Non-vested restricted and performance shares 0.6 0.4 0.4 Options to purchase common stock 0.4 0.4 0.5 Weighted-average number of shares outstanding and common equivalent shares used for diluted earnings per share 118.2 118.3 119.1 Earnings per common share attributable to Owens Corning common stockholders: Basic $ 2.82 $ 1.92 $ 1.73 Diluted $ 2.79 $ 1.91 $ 1.71 Basic earnings per share is calculated by dividing earnings attributable to Owens Corning by the weighted-average number of shares of the Company’s common stock outstanding during the period. Outstanding shares consist of issued shares less treasury stock. On April 19, 2012, the Company approved a new 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 Program”). The Repurchase Program authorizes 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 will be at the Company’s discretion. During the year ended December 31, 2015, 3.1 million shares were repurchased under the Repurchase Program. As of December 31, 2015, 4.6 million shares remain available for repurchase under the Repurchase Program. For the year ended December 31, 2015 , the number of shares used in the calculation of diluted earnings per share did not include 0.1 million performance shares and 0.6 million options to purchase common stock, due to their anti-dilutive effect. For the year ended December 31, 2014 , the number of shares used in the calculation of diluted earnings per share did not include 1.0 million options to purchase common stock, due to their anti-dilutive effect. For the year ended December 31, 2013 , the number of shares used in the calculation of diluted earnings per share did not include 0.6 million options to purchase common stock, due to their anti-dilutive effect.

FAIR VALUE MEASUREMENT

FAIR VALUE MEASUREMENT	12 Months Ended
	Dec. 31, 2015
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENT	FAIR VALUE MEASUREMENT The Company classifies and discloses assets and liabilities carried at fair value in one of the following three categories: Level 1: Quoted market prices in active markets for identical assets or liabilities. Level 2: Observable market based inputs or unobservable inputs that are corroborated by market data. Level 3: Unobservable inputs that are not corroborated by market data. Items Measured at Fair Value The carrying value of cash and cash equivalents, accounts receivable and short-term debt approximate fair value because of the short-term maturity of the instruments. Derivatives The Company executes financial derivative contracts for the purpose of mitigating risk exposure that is generated from our normal operations. These derivatives consist of natural gas swaps, interest rate swaps, cross currency swaps, and foreign exchange forward contracts, 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. Contingent consideration In connection with our third quarter 2014 acquisition, the Company recorded contingent consideration pertaining to amounts payable to the former owners related to a put/call option that was to be determined based on a multiple of 2016 EBITDA. The valuation of contingent consideration used assumptions the Company believed would be made by a market participant and was based on significant inputs not observable in the market. The significant unobservable input used in the fair value measurement of our contingent consideration included our internal forecast of business performance, which was a Level 3 input. As of December 31, 2014, the fair value of the put/call option was estimated to be $5 million and was recorded in Other liabilities on the Consolidated Balance Sheets. During the fourth quarter of 2015, the former owners accepted an offer by the Company to settle the remaining payable for $3 million , for which the payment occurred in the first quarter of 2016. As of December 31, 2015, the liability of $3 million was recorded in Accounts payable and accrued liabilities on the Consolidated Balance Sheets, and was no longer measured using a Level 3 input. The change in fair value of $2 million for the twelve months ended December 31, 2015 was recognized as a reduction to Interest expense, net on the Consolidated Statements of Earnings. The following table summarizes the fair values, and levels within the fair value hierarchy in which the fair value measurements fall, for assets and liabilities measured on a recurring basis as of December 31, 2015 (in millions): Total Measured at Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: Derivative assets $ 14 $ — $ 14 $ — Liabilities: Derivative liabilities $ 6 $ — $ 6 $ — The following table summarizes the fair values, and levels within the fair value hierarchy in which the fair value measurements fall, for assets and liabilities measured on a recurring basis as of December 31, 2014 (in millions): Total Measured at Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: Derivative assets $ 1 $ — $ 1 $ — Liabilities: Derivative liabilities $ 8 $ — $ 8 $ — Contingent consideration 5 — — 5 Total liabilities $ 13 $ — $ 8 $ 5 Items Disclosed at Fair Value Long-term debt The following table shows the fair value of the Company’s long-term debt as calculated based on quoted market prices for the same or similar issues (Level 2 input), or on the current rates offered to the Company for debt of the same remaining maturities: December 31, 2015 December 31, 2014 6.50% senior notes, net of discount, due 2016 103 % 109 % 9.00% senior notes, net of discount, due 2019 116 % 119 % 4.20% senior notes, net of discount, due 2022 99 % 101 % 4.20% senior notes, net of discount, due 2024 100 % 99 % 7.00% senior notes, net of discount, due 2036 105 % 124 % The Company determined that the book value of the remaining long-term debt instruments approximates market value.

INCOME TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES Twelve Months Ended December 31, 2015 2014 2013 Earnings before taxes: United States $ 214 $ 106 $ 196 Foreign 239 126 77 Total $ 453 $ 232 $ 273 Income tax expense: Current United States $ 2 $ (2 ) $ (2 ) State and local 1 — (2 ) Foreign 53 22 30 Total current 56 20 26 Deferred United States 83 (6 ) 56 State and local 10 8 2 Foreign (29 ) (17 ) (16 ) Total deferred 64 (15 ) 42 Total income tax expense $ 120 $ 5 $ 68 The reconciliation between the United States federal statutory rate and the Company’s effective income tax rate from continuing operations is: Twelve Months Ended December 31, 2015 2014 2013 United States federal statutory rate 35 % 35 % 35 % State and local income taxes, net of federal tax benefit 2 1 2 Foreign tax rate differential 2 (15 ) (11 ) U.S. tax expense/benefit on foreign earnings/loss 4 (5 ) (2 ) Valuation allowance (16 ) (1 ) 17 Loss on liquidation — — (10 ) Uncertain tax positions and settlements — (18 ) (1 ) Other, net — 5 (5 ) Effective tax rate 27 % 2 % 25 % As of December 31, 2015 , the Company has not recorded a deferred tax liability of approximately $581 million for foreign withholding and United States federal income taxes on approximately $1.6 billion of accumulated undistributed earnings of its foreign subsidiaries and affiliates as they are considered by management to be permanently reinvested. The cumulative temporary differences giving rise to the deferred tax assets and liabilities at December 31, 2015 and 2014 are as follows (in millions): 2015 2014 Deferred Tax Assets Deferred Tax Liabilities Deferred Tax Assets Deferred Tax Liabilities Other employee benefits $ 120 $ — $ 155 $ — Pension plans 156 — 159 — Operating loss and tax credit carryforwards 957 — 1,046 — Depreciation — 315 — 327 Amortization — 367 — 366 State and local taxes 6 — 4 — Other 62 — 113 — Subtotal 1,301 682 1,477 693 Valuation allowances (135 ) — (227 ) — Total deferred taxes $ 1,166 $ 682 $ 1,250 $ 693 The Company had current deferred tax assets of $0 million and $135 million which are included in other current assets in the Consolidated Balance Sheets as of December 31, 2015 and 2014 , respectively. In November 2015, the FASB issued ASU No. 2015-17 "Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes" ("ASU 2015-17"). ASU 2015-17 requires that deferred tax liabilities and assets be classified as noncurrent in a classified statement of financial position. ASU 2015-17 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016. Early adoption is permitted and the standard may be applied either retrospectively or on a prospective basis to all deferred tax assets and liabilities. The company adopted this standard prospectively in the fourth quarter of 2015. The following table summarizes the amount and expiration dates of our deferred tax assets related to operating loss and credit carryforwards at December 31, 2015 (in millions): Expiration Dates Amounts U.S. federal loss carryforwards 2026 – 2032 $ 670 U.S. state loss carryforwards (a) 2016 – 2032 77 Foreign loss and tax credit carryforwards Indefinite 104 Foreign loss and tax credit carryforwards (a) 2016 – 2034 62 U.S. alternative minimum tax credit Indefinite 28 Other U.S. federal and state tax credits 2028 – 2034 16 Total operating loss and tax credit carryforwards $ 957 (a) As of December 31, 2015 , $14 million of U.S. state and $12 million of foreign deferred tax assets related to loss carryforwards are set to expire over the next three years . At December 31, 2015 , the Company had federal, state and foreign net operating loss carryforwards of $2.0 billion , $2.3 billion and $0.6 billion , respectively. In order to fully utilize our operating loss and tax credit carryforwards, the Company will need to generate federal, state, and foreign earnings before taxes of approximately $2.2 billion , $2.5 billion , and $0.6 billion , respectively. Certain of these loss carryforwards are subject to limitation as a result of the changes of control that resulted from the Company’s emergence from bankruptcy in 2006 and the acquisition of certain foreign entities in 2007. However, the Company believes that these limitations on its loss carryforwards will not result in a forfeiture of any of the carryforwards. Deferred income taxes are provided for temporary differences between amounts of assets and liabilities for financial reporting purposes and the basis of such assets and liabilities as measured under enacted tax laws and regulations, as well as NOLs, tax credit and other carryforwards. A valuation allowance will be recorded to reduce deferred tax assets if, based on all available evidence, it is considered more likely than not that some portion or all of the recorded deferred tax assets will not be realized in future periods. To the extent the reversal of deferred tax liabilities is relied upon in our assessment of the realizability of deferred tax assets, they will reverse in the same period and jurisdiction as the temporary differences giving rise to the deferred tax assets. As of December 31, 2015 , the Company had federal, state, and foreign net deferred tax assets before valuation allowances of $391 million , $50 million , and $178 million , respectively. The valuation allowance of $135 million as of December 31, 2015 is related to tax assets of $11 million and $124 million for certain state and foreign jurisdictions, respectively. Realization of deferred tax assets depends on achieving a certain minimum level of future taxable income. Management currently believes that it is at least reasonably possible that the minimum level of taxable income will be met within the next 12 months to reduce the valuation allowance of certain foreign jurisdictions by a range of zero to $12 million . The valuation allowance of $227 million as of December 31, 2014 related to tax assets of $13 million and $214 million for certain state and foreign jurisdictions, respectively. The Company, or one of its subsidiaries, files income tax returns in the United States and other foreign jurisdictions. The Company is no longer subject to U.S. federal tax examinations for years before 2013 or state and foreign examinations for years before 2008. Due to the potential for resolution of federal, state and foreign examinations, and the expiration of various statutes of limitation, it is reasonably possible that the gross unrecognized tax benefits balance may change within the next 12 months by a range of zero to $3 million . A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in millions): Twelve Months Ended December 31, 2015 2014 2013 Balance at beginning of period $ 106 $ 155 $ 161 Tax positions related to the current year Gross additions 1 2 2 Tax positions related to prior years Gross additions 2 10 4 Gross reductions (18 ) (57 ) (1 ) Settlements (7 ) (1 ) (3 ) Lapses on statutes of limitations — (3 ) (8 ) Balance at end of period $ 84 $ 106 $ 155 The Company classifies all interest and penalties as income tax expense. As of December 31, 2015 , 2014 and 2013 , the Company recognized $8 million , $8 million and $6 million respectively, in liabilities for tax related interest and penalties on its Consolidated Balance Sheets and $3 million , $2 million and $(3) million , respectively, of interest and penalty expense on its Consolidated Statements of Earnings. If these unrecognized tax benefits were to be recognized as of December 31, 2015 , the Company’s income tax expense would decrease by about $61 million .

QUARTERLY FINANCIAL INFORMATION

QUARTERLY FINANCIAL INFORMATION (unaudited)	12 Months Ended
	Dec. 31, 2015
Selected Quarterly Financial Information [Abstract]
QUARTERLY FINANCIAL INFORMATION (unaudited)	QUARTERLY FINANCIAL INFORMATION (unaudited) During the fourth quarter of 2015, the Company discovered an error between Net sales and Cost of sales due to incorrect eliminations in our Composites segment. For the first, second and third quarters of 2015, the previously reported Net sales and Cost of sales were overstated by $4 million , $11 million and $14 million , respectively. For the first, second, third and fourth quarters of 2014, previously reported Net sales and Cost of sales were overstated by $3 million , $5 million , $4 million and $4 million , respectively. This error did not affect Gross margin or Net earnings attributable to Owens Corning. The effect of correcting these errors was not material to any previously issued financial statements. The related amounts presented on the Consolidated Statements of Earnings for the first, second and third quarters of 2015 and the first, second, third and fourth quarters of 2014 have been revised, as shown in the table below (in millions): Quarter First Second Third 2015 Net sales As reported $ 1,207 $ 1,414 $ 1,461 Revision (4 ) (11 ) (14 ) As revised $ 1,203 $ 1,403 $ 1,447 Cost of sales As reported $ 998 $ 1,106 $ 1,121 Revision (4 ) (11 ) (14 ) As revised $ 994 $ 1,095 $ 1,107 Quarter First Second Third Fourth 2014 Net sales As reported $ 1,278 $ 1,355 $ 1,382 $ 1,261 Revision (3 ) (5 ) (4 ) (4 ) As revised $ 1,275 $ 1,350 $ 1,378 $ 1,257 Cost of sales As reported $ 1,044 $ 1,107 $ 1,131 $ 1,018 Revision (3 ) (5 ) (4 ) (4 ) As revised $ 1,041 $ 1,102 $ 1,127 $ 1,014 Select quarterly financial information, reflective of the revisions mentioned above, is presented in the tables below for the quarterly periods of 2015 and 2014 , respectively (in millions, except per share amounts): Quarter First Second Third Fourth 2015 Net sales $ 1,203 $ 1,403 $ 1,447 $ 1,297 Cost of sales 994 1,095 1,107 1,001 Gross margin 209 308 340 296 Earnings before interest and taxes 58 156 196 138 Interest expense, net 26 26 28 20 (Gain) loss on extinguishment of debt — (5 ) — — Income tax expense 13 44 55 8 Net earnings attributable to Owens Corning $ 18 $ 91 $ 112 $ 109 BASIC EARNINGS PER COMMON SHARE ATTRIBUTABLE TO OWENS CORNING COMMON STOCKHOLDERS $ 0.15 $ 0.77 $ 0.96 $ 0.94 DILUTED EARNINGS PER COMMON SHARE ATTRIBUTABLE TO OWENS CORNING STOCKHOLDERS $ 0.15 $ 0.77 $ 0.95 $ 0.92 DIVIDEND PER COMMON SHARE ATTRIBUTABLE TO OWENS CORNING STOCKHOLDERS $ 0.17 $ 0.17 $ 0.17 $ 0.17 Quarter First Second Third Fourth 2014 Net sales $ 1,275 $ 1,350 $ 1,378 $ 1,257 Cost of sales 1,041 1,102 1,127 1,014 Gross margin 234 248 251 243 Earnings before interest and taxes 108 73 107 104 Interest expense, net 27 31 28 28 (Gain) loss on extinguishment of debt — — — 46 Income tax expense (39 ) 21 27 (4 ) Net earnings attributable to Owens Corning $ 120 $ 21 $ 52 $ 33 BASIC EARNINGS PER COMMON SHARE ATTRIBUTABLE TO OWENS CORNING COMMON STOCKHOLDERS $ 1.02 $ 0.18 $ 0.44 $ 0.28 DILUTED EARNINGS PER COMMON SHARE ATTRIBUTABLE TO OWENS CORNING STOCKHOLDERS $ 1.01 $ 0.18 $ 0.44 $ 0.28 DIVIDEND PER COMMON SHARE ATTRIBUTABLE TO OWENS CORNING STOCKHOLDERS $ 0.16 $ 0.16 $ 0.16 $ 0.16

CONDENSED CONSOLIDATING FINANCI

CONDENSED CONSOLIDATING FINANCIAL STATEMENTS	12 Months Ended
	Dec. 31, 2015
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
CONDENSED CONSOLIDATING FINANCIAL STATEMENTS	CONDENSED CONSOLIDATING FINANCIAL STATEMENTS The following Condensed Consolidating Financial Statements present the financial information required with respect to those entities which guarantee certain of the Company’s debt. The Condensed Consolidating Financial Statements are presented on the equity method. Under this method, the investments in subsidiaries are recorded at cost and adjusted for the Company’s share of the subsidiaries’ cumulative results of operations, capital contributions, distributions and other equity changes. The principal elimination entries eliminate investment in subsidiaries and intercompany balances and transactions. During the second quarter of 2015, the Company discovered that certain Property, plant and equipment, net of the Parent was incorrectly classified as assets of the Guarantor Subsidiaries rather than the Parent in the 2014 Condensed Consolidating Balance Sheet as of December 31, 2014. The misclassification increased and decreased previously reported Parent and Guarantor Subsidiaries' Property, plant and equipment, net by $112 million , respectively, decreased the Parent's Investment in subsidiaries by $112 million , and decreased the Guarantor Subsidiaries' Additional paid in capital by $112 million . The effect of correcting these classification errors was not material to the 2014 consolidating financial information, and the related amounts presented for 2014 have been revised. Guarantor and Nonguarantor Financial Statements The Senior Notes and the Senior Revolving Credit Facility are guaranteed, fully, unconditionally and jointly and severally, by each of Owens Corning’s current and future 100% owned material domestic subsidiaries that is a borrower or a guarantor under Owens Corning’s Credit Agreement, which permits changes to the named guarantors in certain situations (collectively, the “Guarantor Subsidiaries”). The remaining subsidiaries have not guaranteed the Senior Notes and the Senior Revolving Credit Facility (collectively, the “Nonguarantor Subsidiaries”). OWENS CORNING AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENT OF EARNINGS FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2015 (in millions) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated NET SALES $ — $ 3,785 $ 1,944 $ (379 ) $ 5,350 COST OF SALES 1 3,062 1,513 (379 ) 4,197 Gross margin (1 ) 723 431 — 1,153 OPERATING EXPENSES Marketing and administrative expenses 126 281 118 — 525 Science and technology expenses — 61 12 — 73 Charges related to cost reduction actions — — (6 ) — (6 ) Other expenses (income), net (48 ) 15 46 — 13 Total operating expenses 78 357 170 — 605 EARNINGS BEFORE INTEREST AND TAXES (79 ) 366 261 — 548 Interest expense, net 95 3 2 — 100 (Gain) loss on extinguishment of debt (5 ) — — — (5 ) EARNINGS BEFORE TAXES (169 ) 363 259 — 453 Less: Income tax expense (71 ) 159 32 — 120 EARNINGS BEFORE EQUITY IN NET EARNINGS OF SUBSIDIARIES AND AFFILIATES (98 ) 204 227 — 333 Equity in net earnings of subsidiaries 428 224 — (652 ) — Equity in net earnings of affiliates — — 1 — 1 NET EARNINGS 330 428 228 (652 ) 334 Less: Net earnings attributable to noncontrolling interests — — 4 — 4 NET EARNINGS ATTRIBUTABLE TO OWENS CORNING $ 330 $ 428 $ 224 $ (652 ) $ 330 OWENS CORNING AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENT OF EARNINGS FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2014 (in millions) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated NET SALES $ — $ 3,646 $ 1,989 $ (375 ) $ 5,260 COST OF SALES (12 ) 3,022 1,649 (375 ) 4,284 Gross margin 12 624 340 — 976 OPERATING EXPENSES Marketing and administrative expenses 112 247 128 — 487 Science and technology expenses — 58 18 — 76 Charges related to cost reduction actions 1 5 31 — 37 Other expenses (income), net (38 ) 17 5 — (16 ) Total operating expenses 75 327 182 — 584 EARNINGS BEFORE INTEREST AND TAXES (63 ) 297 158 — 392 Interest expense, net 106 3 5 — 114 (Gain) loss on extinguishment of debt 46 — — — 46 EARNINGS BEFORE TAXES (215 ) 294 153 — 232 Less: Income tax expense (81 ) 85 1 — 5 EARNINGS BEFORE EQUITY IN NET EARNINGS OF SUBSIDIARIES AND AFFILIATES (134 ) 209 152 — 227 Equity in net earnings of subsidiaries 360 151 — (511 ) — Equity in net earnings of affiliates — — 1 — 1 NET EARNINGS 226 360 153 (511 ) 228 Less: Net earnings attributable to noncontrolling interests — — 2 — 2 NET EARNINGS ATTRIBUTABLE TO OWENS CORNING $ 226 $ 360 $ 151 $ (511 ) $ 226 OWENS CORNING AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENT OF EARNINGS FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2013 (in millions) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated NET SALES $ — $ 3,730 $ 1,988 $ (423 ) $ 5,295 COST OF SALES (10 ) 3,085 1,677 (423 ) 4,329 Gross margin 10 645 311 — 966 OPERATING EXPENSES Marketing and administrative expenses 123 267 140 — 530 Science and technology expenses — 58 19 — 77 Charges related to cost reduction actions — — 8 — 8 Other expenses (income), net (27 ) (39 ) 32 — (34 ) Total operating expenses 96 286 199 — 581 EARNINGS BEFORE INTEREST AND TAXES (86 ) 359 112 — 385 Interest expense, net 104 2 6 — 112 (Gain) loss on extinguishment of debt — — — — — EARNINGS BEFORE TAXES (190 ) 357 106 — 273 Less: Income tax expense (72 ) 121 19 — 68 EARNINGS BEFORE EQUITY IN NET EARNINGS OF SUBSIDIARIES AND AFFILIATES (118 ) 236 87 — 205 Equity in net earnings of subsidiaries 322 86 — (408 ) — Equity in net earnings of affiliates — — — — — NET EARNINGS 204 322 87 (408 ) 205 Less: Net earnings attributable to noncontrolling interests — — 1 — 1 NET EARNINGS ATTRIBUTABLE TO OWENS CORNING $ 204 $ 322 $ 86 $ (408 ) $ 204 OWENS CORNING AND SUBSIDIARIES CONSOLIDATING STATEMENT OF COMPREHENSIVE EARNINGS (LOSS) FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2015 (in millions) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated NET EARNINGS $ 330 $ 428 $ 228 $ (652 ) $ 334 Currency translation adjustment, including net investment hedge (115 ) — — — (115 ) Pension and other postretirement adjustment (net of tax) (6 ) — — — (6 ) Deferred income (loss) on hedging (net of tax) 1 — — — 1 COMPREHENSIVE EARNINGS (LOSS) 210 428 228 (652 ) 214 Less: Comprehensive earnings attributable to noncontrolling interests — — 4 — 4 COMPREHENSIVE EARNINGS (LOSS) ATTRIBUTABLE TO OWENS CORNING $ 210 $ 428 $ 224 $ (652 ) $ 210 OWENS CORNING AND SUBSIDIARIES CONSOLIDATING STATEMENT OF COMPREHENSIVE EARNINGS (LOSS) FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2014 (in millions) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated NET EARNINGS $ 226 $ 360 $ 153 $ (511 ) $ 228 Currency translation adjustment, including net investment hedge (134 ) — — — (134 ) Pension and other postretirement adjustment (net of tax) (113 ) — — — (113 ) Deferred income (loss) on hedging (net of tax) (6 ) — — — (6 ) COMPREHENSIVE EARNINGS (LOSS) (27 ) 360 153 (511 ) (25 ) Less: Comprehensive earnings attributable to noncontrolling interests — — 2 — 2 COMPREHENSIVE EARNINGS (LOSS) ATTRIBUTABLE TO OWENS CORNING $ (27 ) $ 360 $ 151 $ (511 ) $ (27 ) OWENS CORNING AND SUBSIDIARIES CONSOLIDATING STATEMENT OF COMPREHENSIVE EARNINGS (LOSS) FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2013 (in millions) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated NET EARNINGS $ 204 $ 322 $ 87 $ (408 ) $ 205 Currency translation adjustment, including net investment hedge (28 ) — — — (28 ) Pension and other postretirement adjustment (net of tax) 94 — — — 94 Deferred income (loss) on hedging (net of tax) 1 — — — 1 COMPREHENSIVE EARNINGS (LOSS) 271 322 87 (408 ) 272 Less: Comprehensive earnings attributable to noncontrolling interests — — 1 — 1 COMPREHENSIVE EARNINGS (LOSS) ATTRIBUTABLE TO OWENS CORNING $ 271 $ 322 $ 86 $ (408 ) $ 271 OWENS CORNING AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEET AS OF DECEMBER 31, 2015 (in millions) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated ASSETS CURRENT ASSETS Cash and cash equivalents $ — $ 48 $ 48 $ — $ 96 Receivables, net — — 709 — 709 Due from affiliates — 3,148 — (3,148 ) — Inventories — 389 255 — 644 Assets held for sale – current — — 12 — 12 Other current assets 11 21 45 — 77 Total current assets 11 3,606 1,069 (3,148 ) 1,538 Investment in subsidiaries 7,704 2,503 559 (10,766 ) — Due from affiliates — — 739 (739 ) — Property, plant and equipment, net 463 1,404 1,089 — 2,956 Goodwill — 1,127 40 — 1,167 Intangible assets, net — 970 160 (131 ) 999 Deferred income taxes — 430 62 — 492 Other non-current assets 25 64 139 — 228 TOTAL ASSETS $ 8,203 $ 10,104 $ 3,857 $ (14,784 ) $ 7,380 LIABILITIES AND EQUITY CURRENT LIABILITIES Accounts payable and accrued liabilities $ 56 $ 682 $ 210 $ — $ 948 Due to affiliates 2,244 — 904 (3,148 ) — Short-term debt — — 6 — 6 Long-term debt – current portion 160 2 1 — 163 Total current liabilities 2,460 684 1,121 (3,148 ) 1,117 Long-term debt, net of current portion 1,668 14 20 — 1,702 Due to affiliates — 739 — (739 ) — Pension plan liability 286 — 111 — 397 Other employee benefits liability — 227 13 — 240 Deferred income taxes — — 8 — 8 Other liabilities 50 177 41 (131 ) 137 OWENS CORNING STOCKHOLDERS’ EQUITY Preferred stock — — — — — Common stock 1 — — — 1 Additional paid in capital 3,965 6,260 1,618 (7,878 ) 3,965 Accumulated earnings 1,055 2,003 885 (2,888 ) 1,055 Accumulated other comprehensive deficit (670 ) — — — (670 ) Cost of common stock in treasury (612 ) — — — (612 ) Total Owens Corning stockholders’ equity 3,739 8,263 2,503 (10,766 ) 3,739 Noncontrolling interests — — 40 — 40 Total equity 3,739 8,263 2,543 (10,766 ) 3,779 TOTAL LIABILITIES AND EQUITY $ 8,203 $ 10,104 $ 3,857 $ (14,784 ) $ 7,380 OWENS CORNING AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEET AS OF DECEMBER 31, 2014 (in millions) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated ASSETS CURRENT ASSETS Cash and cash equivalents $ — $ 1 $ 66 $ — $ 67 Receivables, net — — 674 — 674 Due from affiliates — 2,858 — (2,858 ) — Inventories — 527 290 — 817 Assets held for sale – current — — 16 — 16 Other current assets 7 132 94 — 233 Total current assets 7 3,518 1,140 (2,858 ) 1,807 Investment in subsidiaries 7,392 2,590 558 (10,540 ) — Due from affiliates — — 881 (881 ) — Property, plant and equipment, net 471 1,285 1,143 — 2,899 Goodwill — 1,127 41 — 1,168 Intangible assets, net — 989 238 (210 ) 1,017 Deferred income taxes 35 380 29 — 444 Other non-current assets 17 62 128 — 207 TOTAL ASSETS $ 7,922 $ 9,951 $ 4,158 $ (14,489 ) $ 7,542 LIABILITIES AND EQUITY CURRENT LIABILITIES Accounts payable and accrued liabilities $ 47 $ 667 $ 235 $ — $ 949 Due to affiliates 1,913 — 945 (2,858 ) — Short-term debt — 25 6 — 31 Long-term debt – current portion — 1 2 — 3 Total current liabilities 1,960 693 1,188 (2,858 ) 983 Long-term debt, net of current portion 1,838 15 125 — 1,978 Due to affiliates — 881 — (881 ) — Pension plan liability 310 — 137 — 447 Other employee benefits liability — 237 15 — 252 Deferred income taxes — — 22 — 22 Other liabilities 122 175 43 (210 ) 130 OWENS CORNING STOCKHOLDERS’ EQUITY Preferred stock — — — — — Common stock 1 — — — 1 Additional paid in capital 3,954 6,371 1,927 (8,298 ) 3,954 Accumulated earnings 805 1,579 663 (2,242 ) 805 Accumulated other comprehensive deficit (550 ) — — — (550 ) Cost of common stock in treasury (518 ) — — — (518 ) Total Owens Corning stockholders’ equity 3,692 7,950 2,590 (10,540 ) 3,692 Noncontrolling interests — — 38 — 38 Total equity 3,692 7,950 2,628 (10,540 ) 3,730 TOTAL LIABILITIES AND EQUITY $ 7,922 $ 9,951 $ 4,158 $ (14,489 ) $ 7,542 OWENS CORNING AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2015 (in millions) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated NET CASH FLOW PROVIDED BY OPERATING ACTIVITIES $ (106 ) $ 465 $ 383 $ — $ 742 NET CASH FLOW USED FOR INVESTING ACTIVITIES Cash paid for property, plant and equipment (21 ) (271 ) (101 ) — (393 ) Derivative settlements 4 — — — 4 Proceeds from the sale of assets or affiliates — — 20 — 20 Investment in subsidiaries and affiliates, net of cash acquired — — — — — Purchases of alloy — — (8 ) — (8 ) Proceeds from the sale of alloy — — 8 — 8 Net cash flow used for investing activities (17 ) (271 ) (81 ) — (369 ) NET CASH FLOW USED FOR FINANCING ACTIVITIES Proceeds from senior revolving credit and receivables securitization facilities 1,236 — 310 — 1,546 Payments on senior revolving credit and receivables securitization facilities (1,236 ) — (416 ) — (1,652 ) Proceeds from long-term debt — — — — — Payments on long-term debt (5 ) (1 ) (2 ) — (8 ) Dividends paid (78 ) — — — (78 ) Net increase (decrease) in short-term debt — (25 ) 3 — (22 ) Purchases of treasury stock (138 ) — — — (138 ) Other 19 — — — 19 Other intercompany loans 325 (121 ) (204 ) — — Net cash flow used for financing activities 123 (147 ) (309 ) — (333 ) Effect of exchange rate changes on cash — — (11 ) — (11 ) Net increase in cash and cash equivalents — 47 (18 ) — 29 Cash and cash equivalents at beginning of period — 1 66 — 67 CASH AND CASH EQUIVALENTS AT END OF PERIOD $ — $ 48 $ 48 $ — $ 96 OWENS CORNING AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2014 (in millions) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated NET CASH FLOW PROVIDED BY OPERATING ACTIVITIES $ (110 ) $ 474 $ 88 $ — $ 452 NET CASH FLOW USED FOR INVESTING ACTIVITIES Cash paid for property, plant and equipment (13 ) (223 ) (138 ) — (374 ) Derivative settlements — — 5 — 5 Proceeds from the sale of assets or affiliates 44 — 21 — 65 Investment in subsidiaries and affiliates, net of cash acquired — (5 ) (7 ) — (12 ) Purchases of alloy — — (28 ) — (28 ) Proceeds from sale of alloy 4 — 43 — 47 Net cash flow used for investing activities 35 (228 ) (104 ) — (297 ) NET CASH FLOW USED FOR FINANCING ACTIVITIES Proceeds from senior revolving credit and receivables securitization facilities 1,226 — 50 — 1,276 Payments on senior revolving credit and receivables securitization facilities (1,238 ) — (106 ) — (1,344 ) Proceeds from long-term debt 390 — — — 390 Payments on long-term debt (400 ) — (2 ) — (402 ) Dividends paid (56 ) — — — (56 ) Net increase (decrease) in short-term debt — 25 5 — 30 Purchases of treasury stock (44 ) — — — (44 ) Other 8 — — — 8 Other intercompany loans 189 (273 ) 84 — — Net cash flow used for financing activities 75 (248 ) 31 — (142 ) Effect of exchange rate changes on cash — — (3 ) — (3 ) Net increase in cash and cash equivalents — (2 ) 12 — 10 Cash and cash equivalents at beginning of period — 3 54 — 57 CASH AND CASH EQUIVALENTS AT END OF PERIOD $ — $ 1 $ 66 $ — $ 67 OWENS CORNING AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2013 (in millions) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated NET CASH FLOW PROVIDED BY OPERATING ACTIVITIES $ (108 ) $ 273 $ 218 $ — $ 383 NET CASH FLOW USED FOR INVESTING ACTIVITIES Cash paid for property, plant and equipment (10 ) (126 ) (175 ) — (311 ) Investment in subsidiaries and affiliates, net of cash acquired — (51 ) (11 ) — (62 ) Proceeds from Hurricane Sandy insurance claims — 58 — — 58 Deposit Related to sale of Hangzhou, China plant — — 34 — 34 Purchases of alloy — — (18 ) — (18 ) Proceeds from sale of alloy 16 — — — 16 Net cash flow used for investing activities 6 (119 ) (170 ) — (283 ) NET CASH FLOW USED FOR FINANCING ACTIVITIES Proceeds from senior revolving credit and receivables securitization facilities 940 — 123 — 1,063 Payments on senior revolving credit and receivables securitization facilities (1,002 ) — (101 ) — (1,103 ) Payments on long-term debt — — (2 ) — (2 ) Net increase (decrease) in short-term debt — — (4 ) — (4 ) Purchases of treasury stock (63 ) — — — (63 ) Other 13 — — — 13 Other intercompany loans 214 (154 ) (60 ) — — Net cash flow used for financing activities 102 (154 ) (44 ) — (96 ) Effect of exchange rate changes on cash — — (2 ) — (2 ) Net increase in cash and cash equivalents — — 2 — 2 Cash and cash equivalents at beginning of period — 3 52 — 55 CASH AND CASH EQUIVALENTS AT END OF PERIOD $ — $ 3 $ 54 $ — $ 57

SCHEDULE II - VALUATION AND QUA

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES	12 Months Ended
	Dec. 31, 2015
Valuation and Qualifying Accounts [Abstract]
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES	SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS AND RESERVES FOR THE YEARS ENDED December 31, 2015, 2014 AND 2013 (in millions) Balance at Beginning of Period Charged to Costs and Expenses Charged to Other Accounts Deductions Acquisitions and Divestitures Balance at End of Period FOR THE YEAR ENDED DECEMBER 31, 2015 Allowance for doubtful accounts $ 10 $ — $ — $ (2 ) (a) $ — $ 8 Tax valuation allowance $ 227 $ (73 ) $ (18 ) $ (1 ) $ — $ 135 FOR THE YEAR ENDED DECEMBER 31, 2014 Allowance for doubtful accounts $ 14 $ 2 $ — $ (6 ) (a) $ — $ 10 Tax valuation allowance $ 270 $ (15 ) $ (17 ) $ (11 ) $ — $ 227 FOR THE YEAR ENDED DECEMBER 31, 2013 Allowance for doubtful accounts $ 17 $ 3 $ — $ (6 ) (a) $ — $ 14 Tax valuation allowance $ 228 $ 46 $ — $ (4 ) $ — $ 270 (a) Uncollectible accounts written off, net of recoveries.

SUBSEQUENT EVENTS (Notes)

SUBSEQUENT EVENTS (Notes)	12 Months Ended
	Dec. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS On January 21, 2016, the Company announced an agreement to acquire a European glass non-wovens and fabrics business for $80 million in total consideration. This downstream business will become a part of the Company's Composites segment. The transaction, which is subject to regulatory approvals and other closing conditions, is anticipated to close in the first half of 2016.

BUSINESS AND SUMMARY OF SIGNI32

BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (POLICIES)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Business Description, General and Basis of Presentation	Description of Business Owens Corning, a Delaware corporation, is a leading global producer of glass fiber reinforcements and other materials for composite systems and of residential and commercial building materials. The Company operates within three segments: Composites, which includes the Company’s Reinforcements and Downstream businesses; Insulation and Roofing. Through these lines of business, Owens Corning manufactures and sells products worldwide. The Company maintains leading market positions in many of its major product categories. General On February 4, 2016, the Board of Directors declared a quarterly dividend of $0.18 per common share payable on April 4, 2016 to shareholders of record as of March 11, 2016. During 2015, the Company recorded additional income tax expense of $8 million related to prior periods. The effects of these charges were not material to the current or any previously issued financial statements. During the fourth quarter of 2015, the Company discovered an error between Net sales and Cost of sales due to incorrect eliminations in our Composites segment. For the twelve months ended December 31, 2014, the previously reported Net sales and Cost of sales were overstated by $16 million . The related amounts presented on the Consolidated Statements of Earnings for the twelve months ended December 31, 2014 were revised. Please refer to Note 20 of the Notes to Consolidated Financial Statements for information about the revisions to the interim periods of 2015 and 2014. The effect of correcting these errors was not material to any previously issued financial statements. In the fourth quarter of 2015, the Company revised the Consolidated and Condensed Consolidating Statements of Cash Flows for the twelve months ended December 31, 2014 and 2013 to correct an error for the presentation of non-cash cash capital expenditures which impacted the operating activities section and the investing activities section. For the twelve months ended December 31, 2014, the impact of this revision increased cash used for Cash paid for property, plant and equipment, cash provided by Changes in accounts payable and accrued liabilities and the related Statements of Cash Flows subtotals by $11 million . For the twelve months ended December 31, 2013, the impact of this revision reduced cash used for Cash paid for property, plant and equipment, cash provided by Changes in accounts payable and accrued liabilities and the related Statements of Cash Flows subtotals by $24 million . The effects of these revisions did not impact the ending cash balance for any period and were not material to any previously issued financial statements. This classification error also impacted the unaudited Consolidated and Condensed Consolidating Statements of Cash Flows for the three months ended March 31, the six months ended June 30, and the nine months ended September 30, 2015 and 2014, respectively. For the three months ended March 31, 2015 and 2014, the impact of this revision increased cash used for Cash paid for property, plant and equipment and decreased cash used for Changes in working capital by $33 million and $29 million , respectively. For the six months ended June 30, 2015 and 2014, the impact of this revision increased cash used for Cash paid for property, plant and equipment and decreased cash used for Changes in working capital by $26 million and $15 million , respectively. For the nine months ended September 30, 2015 and 2014, the impact of this revision increased cash used for Cash paid for property, plant and equipment and decreased cash used for Changes in working capital by $26 million and $16 million , respectively. The effects of these revisions did not impact the ending cash balance for any period and were not material to any previously issued financial statements. Basis of Presentation Unless the context requires otherwise, the terms “Owens Corning,” “Company,” “we” and “our” in these notes refer to Owens Corning and its subsidiaries. The accompanying Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States.
Principles of Consolidation	Principles of Consolidation The Consolidated Financial Statements of the Company include the accounts of majority-owned subsidiaries. Intercompany accounts and transactions are eliminated.
Reclassifications	Reclassifications Certain reclassifications have been made to the 2014 and 2013 Consolidated Financial Statements and Notes to the Consolidated Financial Statements to conform to the classifications used in 2015 .
Use of Estimates and Assumptions	Use of Estimates and Assumptions The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ materially from those estimates.
Revenue Recognition	Revenue Recognition Revenue is recognized when title and risk of loss pass to the customer and collectability is reasonably assured. Provisions for discounts and rebates to customers, returns and other adjustments are provided in the same period that the related sales are recorded and are based on historical experience, current conditions and contractual obligations, as applicable.
Cost of Sales	Cost of Sales Cost of sales includes material, labor, energy and manufacturing overhead costs, including depreciation and amortization expense associated with the manufacture and distribution of the Company’s products. Provisions for warranties are provided in the same period that the related sales are recorded and are based on historical experience, current conditions and contractual obligations, as applicable. Distribution costs include inbound freight costs; purchasing and receiving costs; inspection costs; warehousing costs; shipping and handling costs, which include costs incurred relating to preparing, packaging, and shipping products to customers; and other costs of the Company’s distribution network. All shipping and handling costs billed to the customer are included as net sales in the Consolidated Statements of Earnings.
Marketing and Administrative Expenses	Marketing and Advertising Expenses Marketing and advertising expenses are included in Marketing and administrative expenses. These costs include advertising and marketing communications, which are expensed the first time the advertisement takes place.
Science and Technology Expenses	Science and Technology Expenses The Company incurs certain expenses related to science and technology. These expenses include salaries, building and equipment costs, utilities, administrative expenses, materials and supplies associated with the improvement and development of the Company’s products and manufacturing processes. These costs are expensed as incurred.
Earnings (Loss) per Share	Earnings per Share Basic earnings per share are computed using the weighted-average number of common shares outstanding during the period. Diluted earnings per share reflect the dilutive effect of common equivalent shares and increased shares that would result from the conversion of equity securities. The effects of anti-dilution are not presented.
Cash and Cash Equivalents	Cash and Cash Equivalents The Company defines cash and cash equivalents as cash and time deposits with maturities of three months or less when purchased.
Accounts Receivable	Accounts Receivable Trade accounts receivable are recorded at the invoiced amount and do not bear interest. The allowance for doubtful accounts is an estimate of the amount of probable credit losses in our existing accounts receivable. Account balances are charged off against the allowance when the Company believes it is probable the receivable will not be recovered.
Inventory Valuation	Inventory Valuation Inventory costs include material, labor, and manufacturing overhead costs, including depreciation and amortization expense associated with the manufacture and distribution of the Company’s products. Inventories are stated at lower of cost or market value and expense estimates are made for excess and obsolete inventories. Cost is determined by the first-in, first-out (“FIFO”) method.
Investments in Affiliates	Investments in Affiliates The Company accounts for investments in affiliates of 20% to 50% ownership when the Company does not have a controlling financial interest using the equity method under which the Company’s share of earnings and losses of the affiliate is reflected in earnings and dividends are credited against the investment in affiliate when declared.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill assets are not amortized but are tested for impairment on at least an annual basis. In the current year, as part of the annual assessment, the Company used a quantitative approach to determine whether the fair value of a reporting unit was less than its carrying amount. As part of our testing process for goodwill the Company estimates fair values using a discounted cash flow approach from the perspective of a market participant. Significant estimates in the discounted cash flow approach are cash flow forecasts of our reporting units, the discount rate, the terminal business value and the projected income tax rate. The cash flow forecasts of the reporting units are based upon management’s long-term view of our markets and are the forecasts that are used by senior management and the Board of Directors to 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. The projected income tax rates utilized are the statutory tax rates for the countries where each reporting unit operates. The terminal business value is determined by applying a business growth factor to the latest year for which a forecast exists. As part of our goodwill quantitative testing process, we would evaluate whether there are reasonably likely changes to management’s estimates that would have a material impact on the results of the goodwill impairment testing. Other indefinite-lived intangible assets are not amortized but are tested for impairment on at least an annual basis or when determined to have a finite useful life. Substantially all of the indefinite-lived intangible assets are in trademarks and trade names. The Company uses the royalty relief approach to determine whether it is more likely than not that the fair value of these assets is less than its carrying amount. This review is performed annually, or when circumstances arise which indicate there may be impairment. When applying the royalty relief approach, the Company performs a discounted cash flow analysis based on the value derived from owning these trademarks and trade names and being relieved from paying royalty to third parties. Significant assumptions used include projected cash flows, discount rate, projected income tax rate and terminal business value. These inputs are considered Level 3 inputs under the fair value hierarchy as they are the Company’s own data, and are unobservable in the marketplace. Identifiable intangible assets with a determinable useful life are amortized over that determinable life.
Properties and Depreciation	Properties and Depreciation Property, plant and equipment are stated at cost and depreciated over their estimated useful lives using the straight-line method. Property, plant and equipment accounts are relieved of the cost and related accumulated depreciation when assets are disposed of or otherwise retired. Precious metals used in our production tooling are included in property, plant and equipment and are depleted as they are consumed during the production process. Depletion typically represents an annual expense of less than 3% of the outstanding value and is recorded in Cost of sales on the Consolidated Statements of Earnings. For the years ended December 31, 2015 , 2014 and 2013 depreciation expense was $278 million , $283 million and $310 million , respectively. In 2015 , 2014 and 2013, depreciation expense included $3 million , $1 million and $9 million , respectively, of accelerated depreciation related to cost reduction actions further explained in Note 10 to the Consolidated Financial Statements. In 2014, depreciation expense also included $3 million of impairment losses on held for sale assets. In 2013, depreciation expense included $20 million of accelerated depreciation related to the change in useful life of assets recorded as a result of our assessment of the future utility of an incomplete Insulation facility located in Cordele, Georgia. The range of useful lives for the major components of the Company’s plant and equipment is as follows: Buildings and leasehold improvements 15 – 40 years Machinery and equipment Furnaces 4 – 15 years Information systems 5 – 10 years Equipment 5 – 20 years Expenditures for normal maintenance and repairs are expensed as incurred.
Asset Impairments	Asset Impairments The Company evaluates tangible and intangible long-lived assets for impairment when triggering events have occurred. This requires significant assumptions including projected cash flows, projected income tax rate and terminal business value. These inputs are considered Level 3 inputs under the fair value hierarchy as they are the Company’s own data, and are unobservable in the marketplace. Changes in management intentions, market conditions or operating performance could indicate that impairment charges might be necessary that would be material to the Company’s Consolidated Financial Statements in any given period.
Income Taxes	Income Taxes The Company recognizes current tax liabilities and assets for the estimated taxes payable or refundable on the tax returns for the current year. Deferred tax balances reflect the impact of temporary differences between the carrying amount of assets and liabilities and their tax basis. Amounts are stated at enacted tax rates expected to be in effect when taxes are actually paid or recovered. In addition, realization of certain deferred tax assets is dependent upon our ability to generate future taxable income. The Company records a valuation allowance to reduce its deferred tax assets to the amount that it believes is more likely than not to be realized. In addition, the Company estimates tax reserves to cover potential taxing authority claims for income taxes and interest attributable to audits of open tax years.
Taxes Collected From Customers and Remitted to Government Authorities and Taxes Paid to Vendors	Taxes Collected from Customers and Remitted to Government Authorities and Taxes Paid to Vendors Taxes are assessed by various governmental authorities at different rates on many different types of transactions. The Company charges sales tax or Value Added Tax (“VAT”) on sales to customers where applicable, as well as captures and claims back all available VAT that has been paid on purchases. VAT is recorded in separate payable or receivable accounts and does not affect revenue or cost of sales line items in the income statement. VAT receivable is recorded as a percentage of qualifying purchases at the time the vendor invoice is processed. VAT payable is recorded as a percentage of qualifying sales at the time an Owens Corning sale to a customer subject to VAT occurs. Amounts are paid to the taxing authority according to the method and collection prescribed by local regulations. Where applicable, VAT payable is netted against VAT receivable. The Company also pays sales tax to vendors who include a tax, required by government regulations, to the purchase price charged to the Company.
Pension and Other Postretirement Benefits	Pension and Other Postretirement Benefits Accounting for pensions and other postretirement benefits involves estimating the cost of benefits to be provided well into the future and attributing that cost over the time period each employee works. To accomplish this, extensive use is made of assumptions about investment returns, discount rates, inflation, mortality, turnover and medical costs.
Derivative Financial Instruments	Derivative Financial Instruments The Company recognizes all derivative instruments as either assets or liabilities at fair value on the balance sheet. To the extent that a derivative is effective as a cash flow hedge, the change in fair value of the derivative is deferred in accumulated other comprehensive income/deficit (“OCI”). Any portion considered to be ineffective is reported in earnings immediately. To the extent that a derivative is effective as a fair value hedge, the change in the fair value of the derivative is offset by the change in the fair value of the item being hedged in the Consolidated Statements of Earnings. See Note 4 to the Consolidated Financial Statements for further discussion.
Foreign Currency	Foreign Currency The functional currency of the Company’s subsidiaries is generally the applicable local currency. Assets and liabilities of foreign subsidiaries are translated into United States dollars at the period-end rate of exchange, and their Statements of Earnings and Statements of Cash Flows are converted on an ongoing basis at the monthly average rate. The resulting translation adjustment is included in accumulated OCI in the Consolidated Balance Sheets and Consolidated Statements of Stockholders’ Equity. Transaction gains and losses that arise from exchange rate fluctuations on transactions denominated in a currency other than the functional currency are included in the Consolidated Statements of Earnings as incurred.
Accounting Pronouncements	Accounting Pronouncements In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” (“ASU 2014-09”). ASU 2014-09 outlines a new, single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. This new revenue recognition model provides a five-step analysis in determining when and how revenue is recognized. The new model will require revenue recognition to depict the transfer of promised goods or services to customers in an amount that reflects the consideration a company expects to receive in exchange for those goods or services. The Company is currently assessing the impact that adopting this new accounting guidance will have on its Consolidated Financial Statements and footnote disclosures. ASU 2014-09 is effective, as amended by ASU 2015-14, for fiscal years, and interim periods within those years, beginning after December 15, 2017, and early adoption is permitted. Accordingly, the standard is effective for the Company on January 1, 2018. In April 2015, the FASB issued ASU No. 2015-03, "Interest-Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs" ("ASU 2015-03"). ASU 2015-03 requires debt issuance costs to be presented in the balance sheet as a direct deduction from the carrying value of the associated debt liability, consistent with the presentation of a debt discount. Prior to the issuance of the standard, debt issuance costs were required to be presented in the balance sheet as an asset. In August 2015, the FASB issued ASU 2015-15, "Interest-Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements," ("ASU 2015-15"). ASU 2015-15 states that entities may continue presenting unamortized debt issuance costs for line-of-credit arrangements as an asset, which results in no change to our Consolidated Financial Statements. The retrospective adoption of ASU 2015-03 affected the presentation of debt issuance costs related to our senior notes. Please refer to Note 11 of the Consolidated Financial Statements for additional detail on this adoption. In April 2015, the FASB issued ASU No. 2015-04, "Compensation-Retirement Benefits (Topic 715): Practical Expedient for the Measurement Date of an Employer's Defined Benefit Obligation and Plan Assets" ("ASU 2015-04"). ASU 2015-04 provides a practical expedient for entities to use when a significant event occurs in an interim period that requires remeasurement of defined benefit plan assets and obligations. Entities are permitted to remeasure defined benefit plan assets and obligations using the month-end that is closest to the date of the significant event. The update is not expected to have a material impact on the Company's Consolidated Financial Statements. ASU 2015-04 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2015, and early adoption is permitted. Accordingly, the standard is effective for the Company on January 1, 2016. In July 2015, the FASB issued ASU No. 2015-07, "Fair Value Measurement (Topic 820): Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent)" ("ASU 2015-07"). ASU 2015-07 modifies the practical expedient that permits an entity to measure the fair value of certain investments using the net asset value per share of the investment. The amendment removes the requirement to categorize investments within the fair value hierarchy that are measured using this practical expedient. The amendment also limits disclosure to investments for which the practical expedient has been elected instead of all investments eligible for the practical expedient. The Company is currently assessing the impact that adopting this new accounting guidance will have on its Consolidated Financial Statements. ASU 2015-07 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2015, and early adoption is permitted. Accordingly, the standard is effective for the Company on January 1, 2016. In July 2015, the FASB issued ASU No. 2015-11 "Inventory (Topic 330): Simplifying the Measurement of Inventory" ("ASU 2015-11"). ASU 2015-11 requires that inventory be subsequently measured at the lower or cost or net realizable value. Prior to the issuance of this standard, inventory was measured at the lower of cost or market. The update is not expected to have a material impact on the Company's Consolidated Financial Statements. ASU 2015-11 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016, and early adoption is permitted. Accordingly, the standard is effective for the Company on January 1, 2017. In August 2015, the FASB issued ASU No. 2015-13 "Derivatives and Hedging (Topic 815): Application of the Normal Purchases and Normal Sales Scope Exception to Certain Electricity Contracts within Nodal Energy Markets" ("ASU 2015-13"). ASU 2015-13 now allows the application of the normal purchases and normal sales scope exception to energy purchases in nodal market delivery hubs. The update is not expected to have a material impact on the Company's Consolidated Financial Statements. ASU 2015-13 is effective immediately. In September 2015, the FASB issued ASU No. 2015-16 "Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments" ("ASU 2015-16"). ASU 2015-16 requires that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. Prior to the issuance of the standard, entities were required to retrospectively apply adjustments made to provisional amounts recognized in a business combination. The update is not expected to have a material impact on the Company's Consolidated Financial Statements. ASU 2015-16 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2015, and early adoption is permitted. Accordingly, the standard is effective for the Company on January 1, 2016. In November 2015, the FASB issued ASU No. 2015-17 "Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes" ("ASU 2015-17"). ASU 2015-17 requires that deferred tax liabilities and assets be classified as noncurrent in a classified statement of financial position. The current requirement that deferred tax liabilities and assets of a tax-paying component of an entity be offset and presented as a single amount is not affected by the amendments in ASU 2015-17. ASU 2015-17 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016. Early adoption is permitted and the standard may be applied either retrospectively or on a prospective basis to all deferred tax assets and liabilities. The Company adopted this standard prospectively in the fourth quarter of 2015. Please refer to Note 19 of the Consolidated Financial Statements for additional detail on this adoption. In January 2016, the FASB issued ASU No. 2016-01 "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities" ("ASU 2016-01"). ASU 2016-01 modifies certain aspects of the recognition, measurement, presentation, and disclosure of financial instruments. The Company is currently assessing the impact that adopting this new accounting guidance will have on its Consolidated Financial Statements. ASU 2016-01 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2017, and early adoption is permitted. Accordingly, the standard is effective for the Company on January 1, 2018.

BUSINESS AND SUMMARY OF SIGNI33

BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (TABLE)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Property, Plant and Equipment	The range of useful lives for the major components of the Company’s plant and equipment is as follows: Buildings and leasehold improvements 15 – 40 years Machinery and equipment Furnaces 4 – 15 years Information systems 5 – 10 years Equipment 5 – 20 years Property, plant and equipment consist of the following (in millions): December 31, 2015 December 31, 2014 Land $ 186 $ 196 Buildings and leasehold improvements 788 789 Machinery and equipment 3,478 3,405 Construction in progress 359 233 4,811 4,623 Accumulated depreciation (1,855 ) (1,724 ) Property, plant and equipment, net $ 2,956 $ 2,899

SEGMENT INFORMATION (TABLE)

SEGMENT INFORMATION (TABLE)	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Reconciliation of Revenue from Segments to Consolidated	The following table summarizes our net sales by segment and geographic region (in millions). External customer sales are attributed to geographic region based upon the location from which the product is shipped to the external customer. Twelve Months Ended December 31, 2015 2014 2013 Reportable Segments Composites $ 1,902 $ 1,919 $ 1,845 Insulation 1,850 1,746 1,642 Roofing 1,766 1,748 1,967 Total reportable segments 5,518 5,413 5,454 Corporate eliminations (168 ) (153 ) (159 ) NET SALES $ 5,350 $ 5,260 $ 5,295
Schedule of Revenues by Geographical Areas	External Customer Sales by Geographic Region United States $ 3,697 $ 3,557 $ 3,644 Europe 515 575 545 Asia Pacific 662 636 627 Canada and other 476 492 479 NET SALES $ 5,350 $ 5,260 $ 5,295
Schedule of Earnings before Interest and Taxes	The following table summarizes EBIT by segment (in millions): Twelve Months Ended December 31, 2015 2014 2013 Reportable Segments Composites $ 232 $ 149 $ 98 Insulation 160 108 40 Roofing 266 232 386 Total reportable segments 658 489 524 Charges related to cost reduction actions and related items (2 ) (36 ) (26 ) Net loss on sale of European Stone Business — (20 ) — Impairment loss on Alcala, Spain facility held for sale — (3 ) — Gain on sale of Hangzhou, China facility — 45 — Net gain (loss) related to Hurricane Sandy — (6 ) 15 Accelerated depreciation related to a change in the useful life of assets at our incomplete Cordele, Georgia facility — — (20 ) General corporate expense and other (108 ) (77 ) (108 ) EBIT $ 548 $ 392 $ 385
Reconciliation of Assets from Segment to Consolidated	The following table summarizes total assets by segment and property, plant and equipment by geographic region (in millions): December 31, TOTAL ASSETS 2015 2014 Reportable Segments Composites $ 2,359 $ 2,387 Insulation 2,873 2,844 Roofing 1,055 1,138 Total reportable segments 6,287 6,369 Cash and cash equivalents 96 67 Current and noncurrent deferred income taxes 492 580 Investments in affiliates 54 53 Assets held for sale – current 12 16 Corporate property, plant and equipment, other assets and eliminations 439 457 CONSOLIDATED TOTAL ASSETS $ 7,380 $ 7,542
Schedule of Property, Plant and Equipment by Geographical Areas	December 31, PROPERTY, PLANT AND EQUIPMENT BY GEOGRAPHIC REGION 2015 2014 United States $ 1,918 $ 1,773 Europe 359 404 Asia Pacific 347 377 Canada and other 332 345 TOTAL PROPERTY, PLANT AND EQUIPMENT $ 2,956 $ 2,899
Schedule of Depreciation and Amortization by Segment	The following table summarizes the provision for depreciation and amortization by segment (in millions): Twelve Months Ended December 31, 2015 2014 2013 Reportable Segments Composites $ 125 $ 129 $ 130 Insulation 101 101 104 Roofing 39 39 38 Total reportable segments 265 269 272 General corporate depreciation and amortization (a) 35 35 60 CONSOLIDATED PROVISION FOR DEPRECIATION AND AMORTIZATION $ 300 $ 304 $ 332 (a) 2015 and 2014 include $3 million and $1 million , respectively, of accelerated depreciation related to our decision to close a facility in Japan and optimize a facility in Canada. 2013 includes $9 million of accelerated depreciation related to cost reduction actions and $20 million of accelerated depreciation related to the change in useful life of assets recorded as a result of our assessment of the future utility of an incomplete Insulation facility located in Cordele, Georgia.
Schedule of Additions to Property, Plant and Equipment by Segment	The following table summarizes additions to property, plant and equipment by segment (in millions): Twelve Months Ended December 31, 2015 2014 2013 Reportable Segments Composites $ 186 $ 239 $ 155 Insulation 141 78 107 Roofing 44 41 60 Total reportable segments 371 358 322 General corporate additions 40 33 31 CONSOLIDATED ADDITIONS TO PROPERTY, PLANT AND EQUIPMENT $ 411 $ 391 $ 353 The amounts in the table above represent Additions to property, plant and equipment on an accrual basis.

INVENTORIES (TABLE)

INVENTORIES (TABLE)	12 Months Ended
	Dec. 31, 2015
Inventory Disclosure [Abstract]
Schedule of Inventory, Current	Inventories consist of the following (in millions): December 31, 2015 2014 Finished goods $ 436 $ 568 Materials and supplies 208 249 Total inventories $ 644 $ 817

DERIVATIVE FINANCIAL INSTRUME36

DERIVATIVE FINANCIAL INSTRUMENTS (TABLE)	12 Months Ended
	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Assets and Liabilities at Fair Value	The following table presents the fair value and respective location of derivatives and hedging instruments on the Consolidated Balance Sheets (in millions): Fair Value at Location December 31, 2015 December 31, 2014 Derivative assets designated as hedging instruments: Net investment hedges Cross currency swaps Other current assets $ 4 $ — Cross currency swaps Other non current assets $ 6 $ — Amount of gain recognized in OCI (effective portion) OCI $ 14 $ — Fair value hedges Interest rate swaps Other non current assets $ 4 $ — Derivative liabilities designated as hedging instruments: Fair value hedges Interest rate swaps Other liabilities $ — $ (3 ) Cash flow hedges: Natural gas forward swaps Accounts payable and accrued liabilities $ 5 $ 8 Amount of loss recognized in OCI (effective portion) OCI $ 5 $ 7 Foreign exchange contracts Accounts payable and accrued liabilities $ — $ 1 Amount of loss recognized in OCI (effective portion) OCI $ 1 $ 1 Derivative assets not designated as hedging instruments: Foreign exchange contracts Other current assets $ — $ 1 Derivative liabilities not designated as hedging instruments: Natural gas forward swaps Accounts payable and accrued liabilities $ 1 $ — Foreign exchange contracts Accounts payable and accrued liabilities $ — $ 2
Schedule of Notional Amounts of Outstanding Derivative Positions	The following table presents the notional of derivatives and hedging instruments on the Consolidated Balance Sheets (in millions): Notional Unit of Measure December 31, 2015 Net investment hedges Cross currency swaps U.S. Dollars $ 250 Fair value hedges Interest rate swaps U.S. Dollars $ 100 Cash flow hedges: Natural gas forward swaps U.S. indices MMBtu 8 Natural gas forward swaps European indices MMBtu (equivalent) 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 (in millions): Twelve Months Ended December 31, Location 2015 2014 2013 Derivative activity designated as hedging instruments: Natural gas and electricity: Amount of loss reclassified from OCI into earnings (effective portion) Cost of sales $ 10 $ — $ 1 Interest rate swaps: Amount of (gain) recognized in earnings (ineffective portion) Interest expense, net $ — $ — $ (1 ) Derivative activity not designated as hedging instruments: Natural gas and electricity: Amount of loss recognized in earnings Other expenses (income), net $ 1 $ 1 $ — Foreign currency exchange contract: Amount of (gain) loss recognized in earnings (a) Other expenses (income), net $ (6 ) $ 1 $ 12 (a) (Gains) / losses related to foreign currency derivatives were substantially offset by net revaluation impacts on foreign denominated balance sheet exposures, which were also recorded in Other (income) expenses, net.

GOODWILL AND OTHER INTANGIBLE37

GOODWILL AND OTHER INTANGIBLE ASSETS (TABLE)	12 Months Ended
	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets and Goodwill	Intangible assets and goodwill consist of the following (in millions): December 31, 2015 Weighted Average Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount Amortizable intangible assets: Customer relationships 20 $ 172 $ (82 ) $ 90 Technology 21 193 (93 ) 100 Franchise and other agreements 10 43 (20 ) 23 Indefinite-lived intangible assets: Trademarks 786 — 786 Total intangible assets $ 1,194 $ (195 ) $ 999 Goodwill $ 1,167 December 31, 2014 Weighted Average Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount Amortizable intangible assets: Customer relationships 19 $ 172 $ (72 ) $ 100 Technology 20 193 (83 ) 110 Franchise and other agreements 12 39 (18 ) 21 Indefinite-lived intangible assets: Trademarks 786 — 786 Total intangible assets $ 1,190 $ (173 ) $ 1,017 Goodwill $ 1,168
Schedule of Finite-Lived Intangible Assets	The changes in the gross carrying amount of amortizable intangible assets by asset group are as follows (in millions): Customer Relationships Technology Franchise and Other Agreements Trademarks Total Balance at December 31, 2014 $ 172 $ 193 $ 39 $ 786 $ 1,190 Additional franchises and agreements — — 4 — 4 Balance at December 31, 2015 $ 172 $ 193 $ 43 $ 786 $ 1,194
Schedule of Goodwill	The changes in the net carrying amount of goodwill by segment are as follows (in millions): Composites Insulation Roofing Total Balance at December 31, 2014 $ 57 $ 888 $ 223 $ 1,168 Foreign currency translation (1 ) — — (1 ) Balance at December 31, 2015 $ 56 $ 888 $ 223 $ 1,167

PROPERTY, PLANT AND EQUIPMENT (

PROPERTY, PLANT AND EQUIPMENT (TABLE)	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	The range of useful lives for the major components of the Company’s plant and equipment is as follows: Buildings and leasehold improvements 15 – 40 years Machinery and equipment Furnaces 4 – 15 years Information systems 5 – 10 years Equipment 5 – 20 years Property, plant and equipment consist of the following (in millions): December 31, 2015 December 31, 2014 Land $ 186 $ 196 Buildings and leasehold improvements 788 789 Machinery and equipment 3,478 3,405 Construction in progress 359 233 4,811 4,623 Accumulated depreciation (1,855 ) (1,724 ) Property, plant and equipment, net $ 2,956 $ 2,899

OPERATING LEASES (TABLE)

OPERATING LEASES (TABLE)	12 Months Ended
	Dec. 31, 2015
Leases [Abstract]
Schedule of Future Minimum Rental Payments for Operating Leases	At December 31, 2015 , the minimum future rental commitments under non-cancelable operating leases with initial maturities greater than one year payable over the remaining lives of the leases are (in millions): Period Minimum Future Rental Commitments 2016 $ 58 2017 $ 45 2018 $ 31 2019 $ 24 2020 $ 15 2021 and beyond $ 43

ACCOUNTS PAYABLE AND ACCRUED 40

ACCOUNTS PAYABLE AND ACCRUED LIABILITIES (TABLE)	12 Months Ended
	Dec. 31, 2015
Payables and Accruals [Abstract]
Schedule of Accounts Payable and Accrued Liabilities	Accounts payable and accrued liabilities consist of the following (in millions): December 31, 2015 2014 Accounts payable $ 535 $ 542 Payroll, vacation pay and incentive compensation 153 112 Payroll, property and other taxes 110 93 Other employee benefits liabilities 38 38 Dividends payable 21 19 Warranties (current portion) 14 17 Deferred revenue 9 20 Legal and audit fees 7 8 Accrued interest 7 9 Charges related to cost reduction actions 7 36 Other 47 55 Total $ 948 $ 949

WARRANTIES (TABLE)

WARRANTIES (TABLE)	12 Months Ended
	Dec. 31, 2015
Product Warranties Disclosures [Abstract]
Schedule of Product Warranty Liability	A reconciliation of the warranty liability is as follows (in millions): December 31, 2015 2014 Beginning balance $ 40 $ 41 Amounts accrued for current year 15 25 Settlements of warranty claims (12 ) (26 ) Ending balance $ 43 $ 40

COST REDUCTION ACTIONS (TABLE)

COST REDUCTION ACTIONS (TABLE)	12 Months Ended
	Dec. 31, 2015
Cost Reductions Actions 2014 [Member]
Restructuring Cost and Reserve [Line Items]
Schedule of Restructuring Reserve by Type of Cost	The following table summarizes the status of the unpaid liabilities from the Company’s 2014 cost reduction actions (in millions): Beginning Balance December 31, 2014 Costs Incurred Payments Foreign Currency Translation Non-cash Adjustments Ending Balance December 31, 2015 Cumulative Charges Incurred Severance $ 31 $ (3 ) $ 21 $ (1 ) $ — $ 6 $ 33 Contract Termination 3 — 2 — — 1 3 Pension Curtailment and Settlement — (3 ) — — 3 — (3 ) Total $ 34 $ (6 ) $ 23 $ (1 ) $ 3 $ 7 $ 33

DEBT (TABLE)

DEBT (TABLE)	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	Details of the Company’s outstanding long-term debt are as follows (in millions): December 31, 2015 December 31, 2014 6.50% senior notes, net of discount and financing fees, due 2016 $ 158 $ 158 9.00% senior notes, net of discount and financing fees, due 2019 143 142 4.20% senior notes, net of discount and financing fees, due 2022 596 596 4.20% senior notes, net of discount and financing fees, due 2024 390 388 7.00% senior notes, net of discount and financing fees, due 2036 536 536 Accounts receivable securitization facility, maturing in 2018 — 106 Various capital leases, due through and beyond 2050 36 47 Fair value adjustment to debt 6 8 Total long-term debt 1,865 1,981 Less – current portion 163 3 Long-term debt, net of current portion $ 1,702 $ 1,978
Schedule of Maturities of Long-term Debt	The effects of the interest rate swap are not included in the table below. Period Maturities 2016 $ 164 2017 6 2018 6 2019 150 2020 6 2021 and beyond 1,572 Total $ 1,904

PENSION PLANS (TABLE)

PENSION PLANS (TABLE)	12 Months Ended
	Dec. 31, 2015
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Schedule of Changes in Projected Benefit Obligations	The following tables provide a reconciliation of the change in the projected benefit obligation, the change in plan assets and the net amount recognized in the Consolidated Balance Sheets for the years ended December 31, 2015 and 2014 (in millions): December 31, 2015 December 31, 2014 U.S. Non-U.S. Total U.S. Non-U.S. Total Change in Projected Benefit Obligation Benefit obligation at beginning of period $ 1,193 $ 571 $ 1,764 $ 1,070 $ 546 $ 1,616 Service cost 8 4 12 8 5 13 Interest cost 44 19 63 48 23 71 Actuarial (gain) loss (50 ) (19 ) (69 ) 159 63 222 Currency (gain) — (55 ) (55 ) — (44 ) (44 ) Benefits paid (101 ) (21 ) (122 ) (92 ) (23 ) (115 ) Settlements / Curtailments — (7 ) (7 ) — (2 ) (2 ) Other (2 ) (7 ) (9 ) — 3 3 Benefit obligation at end of period $ 1,092 $ 485 $ 1,577 $ 1,193 $ 571 $ 1,764
Schedule of Changes in Fair Value of Plan Assets	December 31, 2015 December 31, 2014 U.S. Non-U.S. Total U.S. Non-U.S. Total Change in Plan Assets Fair value of assets at beginning of period $ 883 $ 437 $ 1,320 $ 858 $ 422 $ 1,280 Actual return on plan assets (23 ) 2 (21 ) 82 50 132 Currency (loss) — (46 ) (46 ) — (35 ) (35 ) Company contributions 47 13 60 36 16 52 Benefits paid (101 ) (21 ) (122 ) (92 ) (23 ) (115 ) Settlements/curtailments — (7 ) (7 ) — (2 ) (2 ) Other — 1 1 (1 ) 9 8 Fair value of assets at end of period $ 806 $ 379 $ 1,185 $ 883 $ 437 $ 1,320 Funded status $ (286 ) $ (106 ) $ (392 ) $ (310 ) $ (134 ) $ (444 )
Schedule of Amounts Recognized in Balance Sheet	December 31, 2015 December 31, 2014 U.S. Non-U.S. Total U.S. Non-U.S. Total Amounts Recognized in the Consolidated Balance Sheets Prepaid pension cost $ — $ 6 $ 6 $ — $ 5 $ 5 Accrued pension cost – current — (1 ) (1 ) (1 ) (1 ) (2 ) Accrued pension cost – non-current (286 ) (111 ) (397 ) (309 ) (138 ) (447 ) Net amount recognized $ (286 ) $ (106 ) $ (392 ) $ (310 ) $ (134 ) $ (444 )
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)	Amounts Recorded in Accumulated OCI Net actuarial loss $ (431 ) $ (96 ) $ (527 ) $ (415 ) $ (107 ) $ (522 )
Schedule of Assumptions Used to Determine Benefit Obligations	The following table presents weighted average assumptions used to determine benefit obligations at the measurement dates noted: December 31, 2015 2014 United States Plans Discount rate 4.20 % 3.85 % Expected return on plan assets 7.00 % 7.00 % Non-United States Plans Discount rate 3.88 % 3.60 % Expected return on plan assets 6.23 % 6.27 % Rate of compensation increase 3.97 % 4.01 %
Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets	The following table presents information about the projected benefit obligation, accumulated benefit obligation (“ABO”) and plan assets of the Company’s pension plans (in millions): December 31, 2015 December 31, 2014 U.S. Non-U.S. Total U.S. Non-U.S. Total Plans with ABO in excess of fair value of plan assets: Projected benefit obligation $ 1,092 $ 314 $ 1,406 $ 1,193 $ 464 $ 1,657 Accumulated benefit obligation $ 1,092 $ 311 $ 1,403 $ 1,193 $ 448 $ 1,641 Fair value of plan assets $ 806 $ 206 $ 1,012 $ 883 $ 328 $ 1,211 Plans with fair value of assets in excess of ABO: Projected benefit obligation $ — $ 171 $ 171 $ — $ 107 $ 107 Accumulated benefit obligation $ — $ 156 $ 156 $ — $ 99 $ 99 Fair value of plan assets $ — $ 173 $ 173 $ — $ 109 $ 109 Total projected benefit obligation $ 1,092 $ 485 $ 1,577 $ 1,193 $ 571 $ 1,764 Total accumulated benefit obligation $ 1,092 $ 467 $ 1,559 $ 1,193 $ 547 $ 1,740 Total plan assets $ 806 $ 379 $ 1,185 $ 883 $ 437 $ 1,320
Schedule of Net Benefit Costs	The following table presents the components of net periodic pension cost for the periods noted (in millions): Twelve Months Ended December 31, 2015 2014 2013 Service cost $ 12 $ 13 $ 15 Interest cost 63 71 65 Expected return on plan assets (84 ) (84 ) (84 ) Amortization of actuarial loss 18 11 20 Settlement/curtailment (3 ) — — Other 1 — — Net periodic benefit cost $ 7 $ 11 $ 16
Schedule of Assumptions Used to Determine Net Benefit Cost	The following table presents weighted-average assumptions used to determine net periodic pension costs for the periods noted: Twelve Months Ended December 31, 2015 2014 2013 United States Plans Discount rate 3.85 % 4.65 % 3.80 % Expected return on plan assets 7.00 % 7.00 % 7.50 % Rate of compensation increase N/A (a) N/A (a) N/A (a) Non-United States Plans Discount rate 3.60 % 4.45 % 4.10 % Expected return on plan assets 6.27 % 6.38 % 6.13 % Rate of compensation increase 4.01 % 3.94 % 3.50 % (a) Not applicable due to changes in plan made on August 1, 2009 that were effective beginning January 1, 2010.
Schedule of Expected Benefit Payments	The following table shows estimated future benefit payments from the Company’s pension plans (in millions): Year Estimated Benefit Payments 2016 $ 98 2017 $ 97 2018 $ 95 2019 $ 97 2020 $ 98 2021-2024 $ 476
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Schedule of Allocation of Plan Assets	The following table summarizes the fair values, and levels within the fair value hierarchy in which the fair value measurements fall under United States pension plan assets at December 31, 2015 and 2014 (in millions): 2015 Asset Category Level 1 Level 2 Level 3 Total Equity Domestic actively managed $ 85 $ 36 $ — $ 121 Domestic passive index — 51 — 51 International actively managed 79 31 — 110 International passive index — 23 — 23 Fixed income and cash equivalents Cash 1 — — 1 Short-term debt — 33 — 33 Corporate bonds 204 52 — 256 Government debt 88 — — 88 Real estate investment trusts 25 — — 25 Absolute return strategies — 52 — 52 Real assets — 46 — 46 Total United States plan assets $ 482 $ 324 $ — $ 806 2014 Asset Category Level 1 Level 2 Level 3 Total Equity Domestic actively managed $ 99 $ 39 $ — $ 138 Domestic passive index — 61 — 61 International actively managed 81 34 — 115 International passive index — 26 — 26 Fixed income and cash equivalents Cash 2 — — 2 Short-term debt — 26 — 26 Corporate bonds 229 55 — 284 Government debt 98 — — 98 Real estate investment trusts 28 — — 28 Absolute return strategies — 55 — 55 Real assets — 50 — 50 Total United States plan assets $ 537 $ 346 $ — $ 883
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Schedule of Allocation of Plan Assets	The following table summarizes the fair values, and levels within the fair value hierarchy in which the fair value measurements fall under non-United States pension plan assets at December 31, 2015 and 2014 (in millions): 2015 Asset Category Level 1 Level 2 Level 3 Total Equity Domestic actively managed $ — $ 24 $ — $ 24 Domestic passive index — 1 — 1 International actively managed 39 23 — 62 International passive index — 25 — 25 Fixed income and cash equivalents Cash and cash equivalents 2 24 — 26 Corporate bonds — 149 — 149 Government Debt — — — — Absolute return strategies — 92 — 92 Total non-United States plan assets $ 41 $ 338 $ — $ 379 2014 Asset Category Level 1 Level 2 Level 3 Total Equity Domestic actively managed $ — $ 30 $ — $ 30 Domestic passive index — — — — International actively managed — 52 — 52 International passive index — 35 — 35 Fixed income and cash equivalents Cash and cash equivalents — 29 — 29 Corporate bonds — 198 — 198 Government Debt — — — — Absolute return strategies — 93 — 93 Total non-United States plan assets $ — $ 437 $ — $ 437

POSTEMPLOYMENT AND POSTRETIRE45

POSTEMPLOYMENT AND POSTRETIREMENT BENEFITS OTHER THAN PENSIONS (TABLE)	12 Months Ended
	Dec. 31, 2015
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Schedule of Changes in Projected Benefit Obligations	The following tables provide a reconciliation of the change in the projected benefit obligation, the change in plan assets and the net amount recognized in the Consolidated Balance Sheets for the years ended December 31, 2015 and 2014 (in millions): December 31, 2015 December 31, 2014 U.S. Non-U.S. Total U.S. Non-U.S. Total Change in Projected Benefit Obligation Benefit obligation at beginning of period $ 1,193 $ 571 $ 1,764 $ 1,070 $ 546 $ 1,616 Service cost 8 4 12 8 5 13 Interest cost 44 19 63 48 23 71 Actuarial (gain) loss (50 ) (19 ) (69 ) 159 63 222 Currency (gain) — (55 ) (55 ) — (44 ) (44 ) Benefits paid (101 ) (21 ) (122 ) (92 ) (23 ) (115 ) Settlements / Curtailments — (7 ) (7 ) — (2 ) (2 ) Other (2 ) (7 ) (9 ) — 3 3 Benefit obligation at end of period $ 1,092 $ 485 $ 1,577 $ 1,193 $ 571 $ 1,764
Schedule of Amounts Recognized in Balance Sheet	December 31, 2015 December 31, 2014 U.S. Non-U.S. Total U.S. Non-U.S. Total Amounts Recognized in the Consolidated Balance Sheets Prepaid pension cost $ — $ 6 $ 6 $ — $ 5 $ 5 Accrued pension cost – current — (1 ) (1 ) (1 ) (1 ) (2 ) Accrued pension cost – non-current (286 ) (111 ) (397 ) (309 ) (138 ) (447 ) Net amount recognized $ (286 ) $ (106 ) $ (392 ) $ (310 ) $ (134 ) $ (444 )
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)	Amounts Recorded in Accumulated OCI Net actuarial loss $ (431 ) $ (96 ) $ (527 ) $ (415 ) $ (107 ) $ (522 )
Schedule of Assumptions Used to Determine Benefit Obligations	The following table presents weighted average assumptions used to determine benefit obligations at the measurement dates noted: December 31, 2015 2014 United States Plans Discount rate 4.20 % 3.85 % Expected return on plan assets 7.00 % 7.00 % Non-United States Plans Discount rate 3.88 % 3.60 % Expected return on plan assets 6.23 % 6.27 % Rate of compensation increase 3.97 % 4.01 %
Other Postretirement Benefit Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Schedule of Changes in Projected Benefit Obligations	The following table provides a reconciliation of the change in the projected benefit obligation and the net amount recognized in the Consolidated Balance Sheets for the years ended December 31, 2015 and 2014 (in millions): December 31, 2015 December 31, 2014 U.S. Non-U.S. Total U.S. Non-U.S. Total Change in Projected Benefit Obligation Benefit obligation at beginning of period $ 238 $ 16 $ 254 $ 228 $ 16 $ 244 Service cost 2 — 2 2 — 2 Interest cost 8 1 9 9 1 10 Actuarial (gain) loss (3 ) — (3 ) 17 — 17 Currency (gain) — (2 ) (2 ) — (1 ) (1 ) Plan amendments — — — — — — Benefits paid (15 ) (1 ) (16 ) (18 ) (1 ) (19 ) Other — (1 ) (1 ) — 1 1 Benefit obligation at end of period $ 230 $ 13 $ 243 $ 238 $ 16 $ 254 Funded status $ (230 ) $ (13 ) $ (243 ) $ (238 ) $ (16 ) $ (254 )
Schedule of Amounts Recognized in Balance Sheet	Amounts Recognized in the Consolidated Balance Sheets Accrued benefit obligation – current $ (17 ) $ (1 ) $ (18 ) $ (18 ) $ (1 ) $ (19 ) Accrued benefit obligation – non-current (213 ) (12 ) (225 ) (220 ) (15 ) (235 ) Net amount recognized $ (230 ) $ (13 ) $ (243 ) $ (238 ) $ (16 ) $ (254 )
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)	Amounts Recorded in Accumulated OCI Net actuarial gain $ (4 ) $ (4 ) $ (8 ) $ (20 ) $ — $ (20 ) Net prior service credit (17 ) — (17 ) (2 ) (5 ) (7 ) Net amount recognized $ (21 ) $ (4 ) $ (25 ) $ (22 ) $ (5 ) $ (27 )
Schedule of Assumptions Used to Determine Benefit Obligations	The following table presents the discount rates used to determine the benefit obligations: December 31, 2015 2014 United States plans 4.00 % 3.70 % Non-United States plans 3.80 % 3.70 %
Schedule of Net Benefit Costs	The following table presents the components of net periodic postretirement benefit cost (in millions): Twelve Months Ended December 31, 2015 2014 2013 Service cost $ 2 $ 2 $ 3 Interest cost 9 10 9 Amortization of prior service cost (4 ) (4 ) (4 ) Amortization of actuarial gain (1 ) (2 ) (1 ) Other 1 — — Net periodic postretirement benefit cost $ 7 $ 6 $ 7
Schedule of Assumptions Used to Determine Net Benefit Cost	The following table presents the discount rates used to determine net periodic postretirement benefit cost: Twelve Months Ended December 31, 2015 2014 2013 United States plans 3.70 % 4.35 % 3.50 % Non-United States plans 3.70 % 4.45 % 3.80 %
Schedule of Health Care Cost Trend Rates	The following table presents health care cost trend rates used to determine net periodic postretirement benefit cost, as well as information regarding the ultimate rate and the year in which their ultimate rate is reached: Twelve Months Ended December 31, 2015 2014 2013 United States plans Initial rate at end of year 7.00 % 7.00 % 7.00 % Ultimate rate 5.00 % 5.00 % 5.00 % Year in which ultimate rate is reached 2025 2024 2023 Non-United States plans Initial rate at end of year 5.25 % 5.43 % 6.23 % Ultimate rate 4.70 % 4.70 % 4.79 % Year in which ultimate rate is reached 2019 2019 2019
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]	To illustrate, a one-percentage point change in the December 31, 2015 assumed health care cost trend rate would have the following effects (in millions): 1-Percentage Point Increase Decrease Increase (decrease) in total service cost and interest cost components of net periodic postretirement benefit cost $ — $ — Increase (decrease) of accumulated postretirement benefit obligation $ 9 $ (8 )
Schedule of Expected Benefit Payments	The following table shows estimated future benefit payments from the Company’s postretirement benefit plans (in millions): Year Estimated Benefit Payments 2016 $ 19 2017 $ 19 2018 $ 20 2019 $ 19 2020 $ 19 2021-2025 $ 88

STOCK COMPENSATION (TABLE)

STOCK COMPENSATION (TABLE)	12 Months Ended
	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-based Compensation, Stock Options, Activity	The following table summarizes the Company’s stock option activity: Twelve Months Ended December 31, 2015 Twelve Months Ended December 31, 2014 Twelve Months Ended December 31, 2013 Number of Options Weighted- Average Exercise Price Number of Options Weighted- Average Exercise Price Number of Options Weighted- Average Exercise Price Beginning Balance 2,754,895 $ 31.04 2,748,720 $ 29.55 3,025,220 $ 27.78 Granted — — 374,500 37.65 329,800 42.16 Exercised (691,375 ) 29.75 (328,875 ) 25.23 (549,800 ) 26.88 Forfeited (105,100 ) 38.09 (35,400 ) 38.09 (56,500 ) 34.58 Expired (5,100 ) 41.89 (4,050 ) 34.50 — — Ending Balance 1,953,320 $ 31.09 2,754,895 $ 31.04 2,748,720 $ 29.55
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable	The following table summarizes information about the Company’s options outstanding and exercisable: Options Outstanding Options Exercisable Weighted-Average Number Exercisable at Dec. 31, 2015 Weighted-Average Range of Exercise Prices Options Outstanding Remaining Contractual Life Exercise Price Remaining Contractual Life Exercise Price $13.89-$42.16 1,953,320 4.37 $ 31.09 1,552,820 3.56 $ 29.20
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity	A summary of the status of the Company’s plans that had restricted stock issued as of December 31, 2015 , 2014 and 2013 and changes during the twelve months ended December 31, 2015 , 2014 and 2013 are presented below: Twelve Months Ended December 31, 2015 Twelve Months Ended December 31, 2014 Twelve Months Ended December 31, 2013 Number of Shares Weighted- Average Grant Date Fair Value Number of Shares Weighted- Average Grant Date Fair Value Number of Shares Weighted- Average Grant Date Fair Value Beginning Balance 1,727,741 $ 33.58 1,735,824 $ 32.49 1,875,065 $ 27.14 Granted 625,652 39.75 522,994 36.72 512,398 41.01 Vested (504,704 ) 34.24 (459,359 ) 32.49 (573,920 ) 26.00 Forfeited (141,199 ) 38.20 (71,718 ) 37.17 (77,719 ) 34.62 Ending Balance 1,707,490 $ 35.37 1,727,741 $ 33.58 1,735,824 $ 32.49
Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Performance-Based Units, Vested and Expected to Vest	Twelve Months Ended December 31, 2015 Twelve Months Ended December 31, 2014 Twelve Months Ended December 31, 2013 Number of PSUs Weighted- Average Grant Date Fair Value Number of PSUs Weighted- Average Grant Date Fair Value Number of PSUs Weighted- Average Grant Date Fair Value Beginning Balance 416,250 $ 49.53 410,500 $ 53.04 412,910 $ 49.14 Granted 252,200 43.88 248,950 44.43 207,050 56.71 Vested (151,700 ) 56.71 (199,450 ) 52.11 (167,610 ) 48.61 Forfeited/canceled (85,350 ) 48.66 (43,750 ) 41.71 (41,850 ) 50.39 Ending Balance 431,400 $ 44.52 416,250 $ 49.53 410,500 $ 53.04

ACCUMULATED OTHER COMPREHENSI47

ACCUMULATED OTHER COMPREHENSIVE INCOME (TABLE)	12 Months Ended
	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table summarizes the changes in accumulated other comprehensive income (deficit) (“AOCI”) (in millions): Twelve Months Ended Twelve Months Ended Currency Translation Adjustment Beginning balance $ (132 ) $ 2 Loss on foreign currency translation (124 ) (135 ) Gain on net investment hedge 14 — Income tax expense of amount classified into AOCI (5 ) — Net loss on foreign currency translation (115 ) (135 ) Loss reclassified from AOCI to income — 1 Other comprehensive (loss), net of tax (115 ) (134 ) Ending balance $ (247 ) $ (132 ) Pension and Other Postretirement Adjustment Beginning balance $ (413 ) $ (300 ) (Gains) arising during the period (28 ) (192 ) Income tax expense of amount classified into AOCI 5 68 Net (Gains) arising during the period (23 ) (124 ) Amortization of actuarial loss (a) 17 9 Amortization of prior service gain (a) (4 ) (4 ) Settlement gain (a) (3 ) — Income tax benefit of amounts reclassified from AOCI to income (4 ) (1 ) Net amortization and gain reclassified from AOCI to net income 6 4 Translation impact on non-US. Plans 11 7 Other comprehensive income, net of tax (6 ) (113 ) Ending balance $ (419 ) $ (413 ) Deferred Gain (Loss) on Hedging Beginning balance $ (5 ) $ 1 Change in mark to market hedges (8 ) (9 ) Income tax benefit of amount classified into AOCI 3 3 Net loss on derivative instruments (5 ) (6 ) Amounts reclassified from AOCI to income (b) 10 — Income tax benefit of amounts reclassified from AOCI to income (4 ) — Net gain reclassified from AOCI to net income 6 — Other comprehensive income/(loss), net of tax 1 (6 ) Ending balance $ (4 ) $ (5 ) Total AOCI ending balance $ (670 ) $ (550 ) (a)These AOCI components are included in the computation of total Pension and OPEB expense and are recorded in cost of sales and marketing and administrative expenses. See Note 12 for additional information. (b) Amounts reclassified from gain/(loss) on cash flow hedges are reclassified from AOCI to income when the hedged item affects earnings and is recognized in cost of sales. See Note 4 for additional information.

EARNINGS PER SHARE (TABLE)

EARNINGS PER SHARE (TABLE)	12 Months Ended
	Dec. 31, 2015
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table summarizes the number of shares outstanding as well as our basic and diluted earnings per share for the years ended December 31, 2015 , 2014 and 2013 (in millions, except per share amounts): Twelve Months Ended December 31, 2015 2014 2013 Net earnings attributable to Owens Corning $ 330 $ 226 $ 204 Weighted-average number of shares outstanding used for basic earnings per share 117.2 117.5 118.2 Non-vested restricted and performance shares 0.6 0.4 0.4 Options to purchase common stock 0.4 0.4 0.5 Weighted-average number of shares outstanding and common equivalent shares used for diluted earnings per share 118.2 118.3 119.1 Earnings per common share attributable to Owens Corning common stockholders: Basic $ 2.82 $ 1.92 $ 1.73 Diluted $ 2.79 $ 1.91 $ 1.71

FAIR VALUE MEASUREMENT (TABLE)

FAIR VALUE MEASUREMENT (TABLE)	12 Months Ended
	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following table summarizes the fair values, and levels within the fair value hierarchy in which the fair value measurements fall, for assets and liabilities measured on a recurring basis as of December 31, 2015 (in millions): Total Measured at Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: Derivative assets $ 14 $ — $ 14 $ — Liabilities: Derivative liabilities $ 6 $ — $ 6 $ — The following table summarizes the fair values, and levels within the fair value hierarchy in which the fair value measurements fall, for assets and liabilities measured on a recurring basis as of December 31, 2014 (in millions): Total Measured at Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: Derivative assets $ 1 $ — $ 1 $ — Liabilities: Derivative liabilities $ 8 $ — $ 8 $ — Contingent consideration 5 — — 5 Total liabilities $ 13 $ — $ 8 $ 5

INCOME TAXES (TABLE)

INCOME TAXES (TABLE)	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Schedule of Income before Income Tax, Domestic and Foreign	Twelve Months Ended December 31, 2015 2014 2013 Earnings before taxes: United States $ 214 $ 106 $ 196 Foreign 239 126 77 Total $ 453 $ 232 $ 273
Schedule of Components of Income Tax Expense (Benefit), By Jurisdiction	Income tax expense: Current United States $ 2 $ (2 ) $ (2 ) State and local 1 — (2 ) Foreign 53 22 30 Total current 56 20 26 Deferred United States 83 (6 ) 56 State and local 10 8 2 Foreign (29 ) (17 ) (16 ) Total deferred 64 (15 ) 42 Total income tax expense $ 120 $ 5 $ 68
Schedule of Effective Income Tax Rate Reconciliation	The reconciliation between the United States federal statutory rate and the Company’s effective income tax rate from continuing operations is: Twelve Months Ended December 31, 2015 2014 2013 United States federal statutory rate 35 % 35 % 35 % State and local income taxes, net of federal tax benefit 2 1 2 Foreign tax rate differential 2 (15 ) (11 ) U.S. tax expense/benefit on foreign earnings/loss 4 (5 ) (2 ) Valuation allowance (16 ) (1 ) 17 Loss on liquidation — — (10 ) Uncertain tax positions and settlements — (18 ) (1 ) Other, net — 5 (5 ) Effective tax rate 27 % 2 % 25 %
Schedule of Deferred Tax Assets and Liabilities	The cumulative temporary differences giving rise to the deferred tax assets and liabilities at December 31, 2015 and 2014 are as follows (in millions): 2015 2014 Deferred Tax Assets Deferred Tax Liabilities Deferred Tax Assets Deferred Tax Liabilities Other employee benefits $ 120 $ — $ 155 $ — Pension plans 156 — 159 — Operating loss and tax credit carryforwards 957 — 1,046 — Depreciation — 315 — 327 Amortization — 367 — 366 State and local taxes 6 — 4 — Other 62 — 113 — Subtotal 1,301 682 1,477 693 Valuation allowances (135 ) — (227 ) — Total deferred taxes $ 1,166 $ 682 $ 1,250 $ 693
Summary of Operating Loss and Tax Credit Carryforwards	The following table summarizes the amount and expiration dates of our deferred tax assets related to operating loss and credit carryforwards at December 31, 2015 (in millions): Expiration Dates Amounts U.S. federal loss carryforwards 2026 – 2032 $ 670 U.S. state loss carryforwards (a) 2016 – 2032 77 Foreign loss and tax credit carryforwards Indefinite 104 Foreign loss and tax credit carryforwards (a) 2016 – 2034 62 U.S. alternative minimum tax credit Indefinite 28 Other U.S. federal and state tax credits 2028 – 2034 16 Total operating loss and tax credit carryforwards $ 957 (a) As of December 31, 2015 , $14 million of U.S. state and $12 million of foreign deferred tax assets related to loss carryforwards are set to expire over the next three years .
Summary of Income Tax Contingencies	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in millions): Twelve Months Ended December 31, 2015 2014 2013 Balance at beginning of period $ 106 $ 155 $ 161 Tax positions related to the current year Gross additions 1 2 2 Tax positions related to prior years Gross additions 2 10 4 Gross reductions (18 ) (57 ) (1 ) Settlements (7 ) (1 ) (3 ) Lapses on statutes of limitations — (3 ) (8 ) Balance at end of period $ 84 $ 106 $ 155

QUARTERLY FINANCIAL INFORMATI51

QUARTERLY FINANCIAL INFORMATION (unaudited) (TABLE)	12 Months Ended
	Dec. 31, 2015
Selected Quarterly Financial Information [Abstract]
Schedule of Quarterly Financial Information	Quarter First Second Third Fourth 2014 Net sales $ 1,275 $ 1,350 $ 1,378 $ 1,257 Cost of sales 1,041 1,102 1,127 1,014 Gross margin 234 248 251 243 Earnings before interest and taxes 108 73 107 104 Interest expense, net 27 31 28 28 (Gain) loss on extinguishment of debt — — — 46 Income tax expense (39 ) 21 27 (4 ) Net earnings attributable to Owens Corning $ 120 $ 21 $ 52 $ 33 BASIC EARNINGS PER COMMON SHARE ATTRIBUTABLE TO OWENS CORNING COMMON STOCKHOLDERS $ 1.02 $ 0.18 $ 0.44 $ 0.28 DILUTED EARNINGS PER COMMON SHARE ATTRIBUTABLE TO OWENS CORNING STOCKHOLDERS $ 1.01 $ 0.18 $ 0.44 $ 0.28 DIVIDEND PER COMMON SHARE ATTRIBUTABLE TO OWENS CORNING STOCKHOLDERS $ 0.16 $ 0.16 $ 0.16 $ 0.16 Select quarterly financial information, reflective of the revisions mentioned above, is presented in the tables below for the quarterly periods of 2015 and 2014 , respectively (in millions, except per share amounts): Quarter First Second Third Fourth 2015 Net sales $ 1,203 $ 1,403 $ 1,447 $ 1,297 Cost of sales 994 1,095 1,107 1,001 Gross margin 209 308 340 296 Earnings before interest and taxes 58 156 196 138 Interest expense, net 26 26 28 20 (Gain) loss on extinguishment of debt — (5 ) — — Income tax expense 13 44 55 8 Net earnings attributable to Owens Corning $ 18 $ 91 $ 112 $ 109 BASIC EARNINGS PER COMMON SHARE ATTRIBUTABLE TO OWENS CORNING COMMON STOCKHOLDERS $ 0.15 $ 0.77 $ 0.96 $ 0.94 DILUTED EARNINGS PER COMMON SHARE ATTRIBUTABLE TO OWENS CORNING STOCKHOLDERS $ 0.15 $ 0.77 $ 0.95 $ 0.92 DIVIDEND PER COMMON SHARE ATTRIBUTABLE TO OWENS CORNING STOCKHOLDERS $ 0.17 $ 0.17 $ 0.17 $ 0.17
CSB Sales [Table Text Block]	The related amounts presented on the Consolidated Statements of Earnings for the first, second and third quarters of 2015 and the first, second, third and fourth quarters of 2014 have been revised, as shown in the table below (in millions): Quarter First Second Third 2015 Net sales As reported $ 1,207 $ 1,414 $ 1,461 Revision (4 ) (11 ) (14 ) As revised $ 1,203 $ 1,403 $ 1,447 Cost of sales As reported $ 998 $ 1,106 $ 1,121 Revision (4 ) (11 ) (14 ) As revised $ 994 $ 1,095 $ 1,107 Quarter First Second Third Fourth 2014 Net sales As reported $ 1,278 $ 1,355 $ 1,382 $ 1,261 Revision (3 ) (5 ) (4 ) (4 ) As revised $ 1,275 $ 1,350 $ 1,378 $ 1,257 Cost of sales As reported $ 1,044 $ 1,107 $ 1,131 $ 1,018 Revision (3 ) (5 ) (4 ) (4 ) As revised $ 1,041 $ 1,102 $ 1,127 $ 1,014

CONDENSED CONSOLIDATING FINAN52

CONDENSED CONSOLIDATING FINANCIAL STATEMENTS (TABLE)	12 Months Ended
	Dec. 31, 2015
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Consolidating Statement of Earnings (Loss)	OWENS CORNING AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENT OF EARNINGS FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2015 (in millions) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated NET SALES $ — $ 3,785 $ 1,944 $ (379 ) $ 5,350 COST OF SALES 1 3,062 1,513 (379 ) 4,197 Gross margin (1 ) 723 431 — 1,153 OPERATING EXPENSES Marketing and administrative expenses 126 281 118 — 525 Science and technology expenses — 61 12 — 73 Charges related to cost reduction actions — — (6 ) — (6 ) Other expenses (income), net (48 ) 15 46 — 13 Total operating expenses 78 357 170 — 605 EARNINGS BEFORE INTEREST AND TAXES (79 ) 366 261 — 548 Interest expense, net 95 3 2 — 100 (Gain) loss on extinguishment of debt (5 ) — — — (5 ) EARNINGS BEFORE TAXES (169 ) 363 259 — 453 Less: Income tax expense (71 ) 159 32 — 120 EARNINGS BEFORE EQUITY IN NET EARNINGS OF SUBSIDIARIES AND AFFILIATES (98 ) 204 227 — 333 Equity in net earnings of subsidiaries 428 224 — (652 ) — Equity in net earnings of affiliates — — 1 — 1 NET EARNINGS 330 428 228 (652 ) 334 Less: Net earnings attributable to noncontrolling interests — — 4 — 4 NET EARNINGS ATTRIBUTABLE TO OWENS CORNING $ 330 $ 428 $ 224 $ (652 ) $ 330 OWENS CORNING AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENT OF EARNINGS FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2014 (in millions) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated NET SALES $ — $ 3,646 $ 1,989 $ (375 ) $ 5,260 COST OF SALES (12 ) 3,022 1,649 (375 ) 4,284 Gross margin 12 624 340 — 976 OPERATING EXPENSES Marketing and administrative expenses 112 247 128 — 487 Science and technology expenses — 58 18 — 76 Charges related to cost reduction actions 1 5 31 — 37 Other expenses (income), net (38 ) 17 5 — (16 ) Total operating expenses 75 327 182 — 584 EARNINGS BEFORE INTEREST AND TAXES (63 ) 297 158 — 392 Interest expense, net 106 3 5 — 114 (Gain) loss on extinguishment of debt 46 — — — 46 EARNINGS BEFORE TAXES (215 ) 294 153 — 232 Less: Income tax expense (81 ) 85 1 — 5 EARNINGS BEFORE EQUITY IN NET EARNINGS OF SUBSIDIARIES AND AFFILIATES (134 ) 209 152 — 227 Equity in net earnings of subsidiaries 360 151 — (511 ) — Equity in net earnings of affiliates — — 1 — 1 NET EARNINGS 226 360 153 (511 ) 228 Less: Net earnings attributable to noncontrolling interests — — 2 — 2 NET EARNINGS ATTRIBUTABLE TO OWENS CORNING $ 226 $ 360 $ 151 $ (511 ) $ 226 OWENS CORNING AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENT OF EARNINGS FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2013 (in millions) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated NET SALES $ — $ 3,730 $ 1,988 $ (423 ) $ 5,295 COST OF SALES (10 ) 3,085 1,677 (423 ) 4,329 Gross margin 10 645 311 — 966 OPERATING EXPENSES Marketing and administrative expenses 123 267 140 — 530 Science and technology expenses — 58 19 — 77 Charges related to cost reduction actions — — 8 — 8 Other expenses (income), net (27 ) (39 ) 32 — (34 ) Total operating expenses 96 286 199 — 581 EARNINGS BEFORE INTEREST AND TAXES (86 ) 359 112 — 385 Interest expense, net 104 2 6 — 112 (Gain) loss on extinguishment of debt — — — — — EARNINGS BEFORE TAXES (190 ) 357 106 — 273 Less: Income tax expense (72 ) 121 19 — 68 EARNINGS BEFORE EQUITY IN NET EARNINGS OF SUBSIDIARIES AND AFFILIATES (118 ) 236 87 — 205 Equity in net earnings of subsidiaries 322 86 — (408 ) — Equity in net earnings of affiliates — — — — — NET EARNINGS 204 322 87 (408 ) 205 Less: Net earnings attributable to noncontrolling interests — — 1 — 1 NET EARNINGS ATTRIBUTABLE TO OWENS CORNING $ 204 $ 322 $ 86 $ (408 ) $ 204
Condensed Consolidating Statement Of Comprehensive Earnings	OWENS CORNING AND SUBSIDIARIES CONSOLIDATING STATEMENT OF COMPREHENSIVE EARNINGS (LOSS) FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2015 (in millions) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated NET EARNINGS $ 330 $ 428 $ 228 $ (652 ) $ 334 Currency translation adjustment, including net investment hedge (115 ) — — — (115 ) Pension and other postretirement adjustment (net of tax) (6 ) — — — (6 ) Deferred income (loss) on hedging (net of tax) 1 — — — 1 COMPREHENSIVE EARNINGS (LOSS) 210 428 228 (652 ) 214 Less: Comprehensive earnings attributable to noncontrolling interests — — 4 — 4 COMPREHENSIVE EARNINGS (LOSS) ATTRIBUTABLE TO OWENS CORNING $ 210 $ 428 $ 224 $ (652 ) $ 210 OWENS CORNING AND SUBSIDIARIES CONSOLIDATING STATEMENT OF COMPREHENSIVE EARNINGS (LOSS) FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2014 (in millions) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated NET EARNINGS $ 226 $ 360 $ 153 $ (511 ) $ 228 Currency translation adjustment, including net investment hedge (134 ) — — — (134 ) Pension and other postretirement adjustment (net of tax) (113 ) — — — (113 ) Deferred income (loss) on hedging (net of tax) (6 ) — — — (6 ) COMPREHENSIVE EARNINGS (LOSS) (27 ) 360 153 (511 ) (25 ) Less: Comprehensive earnings attributable to noncontrolling interests — — 2 — 2 COMPREHENSIVE EARNINGS (LOSS) ATTRIBUTABLE TO OWENS CORNING $ (27 ) $ 360 $ 151 $ (511 ) $ (27 ) OWENS CORNING AND SUBSIDIARIES CONSOLIDATING STATEMENT OF COMPREHENSIVE EARNINGS (LOSS) FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2013 (in millions) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated NET EARNINGS $ 204 $ 322 $ 87 $ (408 ) $ 205 Currency translation adjustment, including net investment hedge (28 ) — — — (28 ) Pension and other postretirement adjustment (net of tax) 94 — — — 94 Deferred income (loss) on hedging (net of tax) 1 — — — 1 COMPREHENSIVE EARNINGS (LOSS) 271 322 87 (408 ) 272 Less: Comprehensive earnings attributable to noncontrolling interests — — 1 — 1 COMPREHENSIVE EARNINGS (LOSS) ATTRIBUTABLE TO OWENS CORNING $ 271 $ 322 $ 86 $ (408 ) $ 271
Condensed Consolidating Balance Sheet	OWENS CORNING AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEET AS OF DECEMBER 31, 2015 (in millions) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated ASSETS CURRENT ASSETS Cash and cash equivalents $ — $ 48 $ 48 $ — $ 96 Receivables, net — — 709 — 709 Due from affiliates — 3,148 — (3,148 ) — Inventories — 389 255 — 644 Assets held for sale – current — — 12 — 12 Other current assets 11 21 45 — 77 Total current assets 11 3,606 1,069 (3,148 ) 1,538 Investment in subsidiaries 7,704 2,503 559 (10,766 ) — Due from affiliates — — 739 (739 ) — Property, plant and equipment, net 463 1,404 1,089 — 2,956 Goodwill — 1,127 40 — 1,167 Intangible assets, net — 970 160 (131 ) 999 Deferred income taxes — 430 62 — 492 Other non-current assets 25 64 139 — 228 TOTAL ASSETS $ 8,203 $ 10,104 $ 3,857 $ (14,784 ) $ 7,380 LIABILITIES AND EQUITY CURRENT LIABILITIES Accounts payable and accrued liabilities $ 56 $ 682 $ 210 $ — $ 948 Due to affiliates 2,244 — 904 (3,148 ) — Short-term debt — — 6 — 6 Long-term debt – current portion 160 2 1 — 163 Total current liabilities 2,460 684 1,121 (3,148 ) 1,117 Long-term debt, net of current portion 1,668 14 20 — 1,702 Due to affiliates — 739 — (739 ) — Pension plan liability 286 — 111 — 397 Other employee benefits liability — 227 13 — 240 Deferred income taxes — — 8 — 8 Other liabilities 50 177 41 (131 ) 137 OWENS CORNING STOCKHOLDERS’ EQUITY Preferred stock — — — — — Common stock 1 — — — 1 Additional paid in capital 3,965 6,260 1,618 (7,878 ) 3,965 Accumulated earnings 1,055 2,003 885 (2,888 ) 1,055 Accumulated other comprehensive deficit (670 ) — — — (670 ) Cost of common stock in treasury (612 ) — — — (612 ) Total Owens Corning stockholders’ equity 3,739 8,263 2,503 (10,766 ) 3,739 Noncontrolling interests — — 40 — 40 Total equity 3,739 8,263 2,543 (10,766 ) 3,779 TOTAL LIABILITIES AND EQUITY $ 8,203 $ 10,104 $ 3,857 $ (14,784 ) $ 7,380 OWENS CORNING AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEET AS OF DECEMBER 31, 2014 (in millions) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated ASSETS CURRENT ASSETS Cash and cash equivalents $ — $ 1 $ 66 $ — $ 67 Receivables, net — — 674 — 674 Due from affiliates — 2,858 — (2,858 ) — Inventories — 527 290 — 817 Assets held for sale – current — — 16 — 16 Other current assets 7 132 94 — 233 Total current assets 7 3,518 1,140 (2,858 ) 1,807 Investment in subsidiaries 7,392 2,590 558 (10,540 ) — Due from affiliates — — 881 (881 ) — Property, plant and equipment, net 471 1,285 1,143 — 2,899 Goodwill — 1,127 41 — 1,168 Intangible assets, net — 989 238 (210 ) 1,017 Deferred income taxes 35 380 29 — 444 Other non-current assets 17 62 128 — 207 TOTAL ASSETS $ 7,922 $ 9,951 $ 4,158 $ (14,489 ) $ 7,542 LIABILITIES AND EQUITY CURRENT LIABILITIES Accounts payable and accrued liabilities $ 47 $ 667 $ 235 $ — $ 949 Due to affiliates 1,913 — 945 (2,858 ) — Short-term debt — 25 6 — 31 Long-term debt – current portion — 1 2 — 3 Total current liabilities 1,960 693 1,188 (2,858 ) 983 Long-term debt, net of current portion 1,838 15 125 — 1,978 Due to affiliates — 881 — (881 ) — Pension plan liability 310 — 137 — 447 Other employee benefits liability — 237 15 — 252 Deferred income taxes — — 22 — 22 Other liabilities 122 175 43 (210 ) 130 OWENS CORNING STOCKHOLDERS’ EQUITY Preferred stock — — — — — Common stock 1 — — — 1 Additional paid in capital 3,954 6,371 1,927 (8,298 ) 3,954 Accumulated earnings 805 1,579 663 (2,242 ) 805 Accumulated other comprehensive deficit (550 ) — — — (550 ) Cost of common stock in treasury (518 ) — — — (518 ) Total Owens Corning stockholders’ equity 3,692 7,950 2,590 (10,540 ) 3,692 Noncontrolling interests — — 38 — 38 Total equity 3,692 7,950 2,628 (10,540 ) 3,730 TOTAL LIABILITIES AND EQUITY $ 7,922 $ 9,951 $ 4,158 $ (14,489 ) $ 7,542
Condensed Consolidating Statement of Cash Flows	OWENS CORNING AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2015 (in millions) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated NET CASH FLOW PROVIDED BY OPERATING ACTIVITIES $ (106 ) $ 465 $ 383 $ — $ 742 NET CASH FLOW USED FOR INVESTING ACTIVITIES Cash paid for property, plant and equipment (21 ) (271 ) (101 ) — (393 ) Derivative settlements 4 — — — 4 Proceeds from the sale of assets or affiliates — — 20 — 20 Investment in subsidiaries and affiliates, net of cash acquired — — — — — Purchases of alloy — — (8 ) — (8 ) Proceeds from the sale of alloy — — 8 — 8 Net cash flow used for investing activities (17 ) (271 ) (81 ) — (369 ) NET CASH FLOW USED FOR FINANCING ACTIVITIES Proceeds from senior revolving credit and receivables securitization facilities 1,236 — 310 — 1,546 Payments on senior revolving credit and receivables securitization facilities (1,236 ) — (416 ) — (1,652 ) Proceeds from long-term debt — — — — — Payments on long-term debt (5 ) (1 ) (2 ) — (8 ) Dividends paid (78 ) — — — (78 ) Net increase (decrease) in short-term debt — (25 ) 3 — (22 ) Purchases of treasury stock (138 ) — — — (138 ) Other 19 — — — 19 Other intercompany loans 325 (121 ) (204 ) — — Net cash flow used for financing activities 123 (147 ) (309 ) — (333 ) Effect of exchange rate changes on cash — — (11 ) — (11 ) Net increase in cash and cash equivalents — 47 (18 ) — 29 Cash and cash equivalents at beginning of period — 1 66 — 67 CASH AND CASH EQUIVALENTS AT END OF PERIOD $ — $ 48 $ 48 $ — $ 96 OWENS CORNING AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2014 (in millions) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated NET CASH FLOW PROVIDED BY OPERATING ACTIVITIES $ (110 ) $ 474 $ 88 $ — $ 452 NET CASH FLOW USED FOR INVESTING ACTIVITIES Cash paid for property, plant and equipment (13 ) (223 ) (138 ) — (374 ) Derivative settlements — — 5 — 5 Proceeds from the sale of assets or affiliates 44 — 21 — 65 Investment in subsidiaries and affiliates, net of cash acquired — (5 ) (7 ) — (12 ) Purchases of alloy — — (28 ) — (28 ) Proceeds from sale of alloy 4 — 43 — 47 Net cash flow used for investing activities 35 (228 ) (104 ) — (297 ) NET CASH FLOW USED FOR FINANCING ACTIVITIES Proceeds from senior revolving credit and receivables securitization facilities 1,226 — 50 — 1,276 Payments on senior revolving credit and receivables securitization facilities (1,238 ) — (106 ) — (1,344 ) Proceeds from long-term debt 390 — — — 390 Payments on long-term debt (400 ) — (2 ) — (402 ) Dividends paid (56 ) — — — (56 ) Net increase (decrease) in short-term debt — 25 5 — 30 Purchases of treasury stock (44 ) — — — (44 ) Other 8 — — — 8 Other intercompany loans 189 (273 ) 84 — — Net cash flow used for financing activities 75 (248 ) 31 — (142 ) Effect of exchange rate changes on cash — — (3 ) — (3 ) Net increase in cash and cash equivalents — (2 ) 12 — 10 Cash and cash equivalents at beginning of period — 3 54 — 57 CASH AND CASH EQUIVALENTS AT END OF PERIOD $ — $ 1 $ 66 $ — $ 67 OWENS CORNING AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS FOR THE TWELVE MONTHS ENDED DECEMBER 31, 2013 (in millions) Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations Consolidated NET CASH FLOW PROVIDED BY OPERATING ACTIVITIES $ (108 ) $ 273 $ 218 $ — $ 383 NET CASH FLOW USED FOR INVESTING ACTIVITIES Cash paid for property, plant and equipment (10 ) (126 ) (175 ) — (311 ) Investment in subsidiaries and affiliates, net of cash acquired — (51 ) (11 ) — (62 ) Proceeds from Hurricane Sandy insurance claims — 58 — — 58 Deposit Related to sale of Hangzhou, China plant — — 34 — 34 Purchases of alloy — — (18 ) — (18 ) Proceeds from sale of alloy 16 — — — 16 Net cash flow used for investing activities 6 (119 ) (170 ) — (283 ) NET CASH FLOW USED FOR FINANCING ACTIVITIES Proceeds from senior revolving credit and receivables securitization facilities 940 — 123 — 1,063 Payments on senior revolving credit and receivables securitization facilities (1,002 ) — (101 ) — (1,103 ) Payments on long-term debt — — (2 ) — (2 ) Net increase (decrease) in short-term debt — — (4 ) — (4 ) Purchases of treasury stock (63 ) — — — (63 ) Other 13 — — — 13 Other intercompany loans 214 (154 ) (60 ) — — Net cash flow used for financing activities 102 (154 ) (44 ) — (96 ) Effect of exchange rate changes on cash — — (2 ) — (2 ) Net increase in cash and cash equivalents — — 2 — 2 Cash and cash equivalents at beginning of period — 3 52 — 55 CASH AND CASH EQUIVALENTS AT END OF PERIOD $ — $ 3 $ 54 $ — $ 57

BUSINESS AND SUMMARY OF SIGNI53

BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (DETAIL) $ / shares in Units, $ in Millions	Feb. 04, 2016$ / shares	Dec. 31, 2015USD ($)	Sep. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Mar. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Sep. 30, 2014USD ($)	Jun. 30, 2014USD ($)	Mar. 31, 2014USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2014USD ($)	Dec. 31, 2015USD ($)segment$ / shares	Dec. 31, 2014USD ($)$ / shares	Dec. 31, 2013USD ($)$ / shares
Property Plant And Equipment [Line Items]
Number of Reportable Segments | segment														3
Dividend (dollars per share) | $ / shares														$ 0.68	$ 0.64	$ 0
Changes in accounts payable and accrued liabilities														$ 28	$ 3	$ 22
Additions to plant and equipment														393	374	311
Less: Income tax expense		$ 8	$ 55	$ 44	$ 13	$ (4)	$ 27	$ 21	$ (39)					120	5	68
COST OF SALES		$ 1,001	$ 1,107	$ 1,095	994	1,014	$ 1,127	1,102	1,041					4,197	4,284	4,329
Cash Flows From Operating Activities														742	452	383
Cash Flows From Financing Activities														333	142	96
Marketing and Advertising Expense														98	100	105
Amortization of Intangible Assets														$ 22	21	22
Precious Metals Depletion Percentage		3.00%												3.00%
Depreciation														$ 278	283	310
Accelerated Depreciation														0	0	20
Restructuring and Related Cost, Accelerated Depreciation														3	1	9
Foreign Currency Transaction Gain (Loss)														(5)	(4)	3
Insulation Facility [Member]
Property Plant And Equipment [Line Items]
Restructuring and Related Cost, Accelerated Depreciation																20
Other Noncurrent Assets [Member]
Property Plant And Equipment [Line Items]
Investments in Affiliates		$ 54				$ 53								$ 54	53
Minimum [Member] | Building and Building Improvements [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment Estimated Useful Lives														15 years
Minimum [Member] | Furnaces [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment Estimated Useful Lives														4 years
Minimum [Member] | Technology Equipment [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment Estimated Useful Lives														5 years
Minimum [Member] | Equipment [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment Estimated Useful Lives														5 years
Maximum [Member] | Building and Building Improvements [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment Estimated Useful Lives														40 years
Maximum [Member] | Furnaces [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment Estimated Useful Lives														15 years
Maximum [Member] | Technology Equipment [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment Estimated Useful Lives														10 years
Maximum [Member] | Equipment [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment Estimated Useful Lives														20 years
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Property Plant And Equipment [Line Items]
Impairment of Long-Lived Assets Held for Sale															3
Misclassification Of Non-cash Debt Fair Value Hedge Adjustments [Member]
Property Plant And Equipment [Line Items]
Cash Flows From Financing Activities								$ 11
Restatement Adjustment [Member]
Property Plant And Equipment [Line Items]
Changes in accounts payable and accrued liabilities															11	(24)
Additions to plant and equipment					33				33	$ 26	$ 26	$ 26	$ 26		11	$ (24)
Increase (Decrease) in Operating Capital					$ 29				$ 29	$ 15	$ 15	$ 16	$ 16
COST OF SALES															(16)
Restatement Adjustment [Member] | Misclassification Of Non-cash Debt Fair Value Hedge Adjustments [Member]
Property Plant And Equipment [Line Items]
Cash Flows From Financing Activities															$ 11
Subsequent Event [Member]
Property Plant And Equipment [Line Items]
Dividend (dollars per share) | $ / shares	$ 0.18
Additional Income Tax Expense Related to Prior Periods [Member]
Property Plant And Equipment [Line Items]
Less: Income tax expense														$ 8

SEGMENT INFORMATION (DETAIL)

SEGMENT INFORMATION (DETAIL) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015USD ($)	Sep. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Mar. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Sep. 30, 2014USD ($)	Jun. 30, 2014USD ($)	Mar. 31, 2014USD ($)	Dec. 31, 2015USD ($)segment	Dec. 31, 2014USD ($)		Dec. 31, 2013USD ($)		Dec. 31, 2012USD ($)
Segment Reporting, Significant Reconciling Item [Line Items]
Number of Reportable Segments | segment									3
Revenues									$ 5,350	$ 5,260		$ 5,295
Charges related to cost reduction actions and related items									(2)	(36)		(26)
Net gain (loss) related to Hurricane Sandy									0	(6)		15
Accelerated depreciation related to a change in the useful life of assets at our incomplete Cordele, Georgia facility									0	0		(20)
General corporate expense and other									(108)	(77)		(108)
Earnings Before Interest And Taxes	$ 138	$ 196	$ 156	$ 58	$ 104	$ 107	$ 73	$ 108	548	392		385
Charges related to cost reduction actions									(6)	37		8
Total Assets	7,380				7,542				7,380	7,542
Cash and cash equivalents	96				67				96	67		57		$ 55
Current and noncurrent deferred income taxes	492				580				492	580
Investments in affiliates	54				53				54	53
Assets held for sale – current	12				16				12	16
Corporate property, plant and equipment, other assets and eliminations	439				457				439	457
Property, plant and equipment, net	2,956				2,899				2,956	2,899
Depreciation and amortization									300	304		332
Accelerated depreciation related to cost reduction actions									3	1		9
Additions to plant and equipment									411	391		353
Facility Closing [Member]
Segment Reporting, Significant Reconciling Item [Line Items]
Accelerated depreciation related to cost reduction actions									3	1
Cost Reduction Action [Member]
Segment Reporting, Significant Reconciling Item [Line Items]
Accelerated depreciation related to cost reduction actions												9
Building Materials European Stone [Member]
Segment Reporting, Significant Reconciling Item [Line Items]
Net loss on sale of European Stone Business									0	(20)		0
Alcala, Spain Facility [Member]
Segment Reporting, Significant Reconciling Item [Line Items]
Impairment loss on Alcala, Spain facility held for sale									0	(3)		0
Hangzhou Facility [Member]
Segment Reporting, Significant Reconciling Item [Line Items]
Gain on sale of Hangzhou, China facility									0	45		0
United States [Member]
Segment Reporting, Significant Reconciling Item [Line Items]
Revenues									3,697	3,557		3,644
Property, plant and equipment, net	1,918				1,773				1,918	1,773
Europe [Member]
Segment Reporting, Significant Reconciling Item [Line Items]
Revenues									515	575		545
Property, plant and equipment, net	359				404				359	404
Asia Pacific [Member]
Segment Reporting, Significant Reconciling Item [Line Items]
Revenues									662	636		627
Property, plant and equipment, net	347				377				347	377
Other Geographical [Member]
Segment Reporting, Significant Reconciling Item [Line Items]
Revenues									476	492		479
Property, plant and equipment, net	332				345				332	345
Composites [Member]
Segment Reporting, Significant Reconciling Item [Line Items]
Revenues									1,902	1,919		1,845
Income (Loss) from Operations before Interest and Taxes Attributable to Segments									232	149		98
Total Assets	2,359				2,387				2,359	2,387
Depreciation and amortization									125	129		130
Additions to plant and equipment									186	239		155
Insulation [Member]
Segment Reporting, Significant Reconciling Item [Line Items]
Revenues									1,850	1,746		1,642
Income (Loss) from Operations before Interest and Taxes Attributable to Segments									160	108		40
Total Assets	2,873				2,844				2,873	2,844
Depreciation and amortization									101	101		104
Additions to plant and equipment									141	78		107
Roofing [Member]
Segment Reporting, Significant Reconciling Item [Line Items]
Revenues									1,766	1,748		1,967
Income (Loss) from Operations before Interest and Taxes Attributable to Segments									266	232		386
Total Assets	1,055				1,138				1,055	1,138
Depreciation and amortization									39	39		38
Additions to plant and equipment									44	41		60
Total Segments [Member]
Segment Reporting, Significant Reconciling Item [Line Items]
Revenues									5,518	5,413		5,454
Income (Loss) from Operations before Interest and Taxes Attributable to Segments									658	489		524
Total Assets	$ 6,287				$ 6,369				6,287	6,369
Depreciation and amortization									265	269		272
Additions to plant and equipment									371	358		322
Corporate Eliminations [Member]
Segment Reporting, Significant Reconciling Item [Line Items]
Revenues									(168)	(153)		(159)
General Corporate [Member]
Segment Reporting, Significant Reconciling Item [Line Items]
Depreciation and amortization									35	35	[1]	60	[1]
Additions to plant and equipment									$ 40	$ 33		$ 31
[1]	2014 include $3 million and $1 million, respectively, of accelerated depreciation related to our decision to close a facility in Japan and optimize a facility in Canada. 2013 includes $9 million of accelerated depreciation related to cost reduction actions and $20 million of accelerated depreciation related to the change in useful life of assets recorded as a result of our assessment of the future utility of an incomplete Insulation facility located in Cordele, Georgia.

INVENTORIES (DETAIL)

INVENTORIES (DETAIL) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Inventory Disclosure [Abstract]
Finished goods	$ 436	$ 568
Materials and supplies	208	249
Total inventories	$ 644	$ 817

DERIVATIVE FINANCIAL INSTRUME56

DERIVATIVE FINANCIAL INSTRUMENTS (BALANCE SHEET) (DETAIL) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Other Current Assets [Member] | Designated as Hedging Instrument [Member] | Net Investment Hedging [Member] | Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Net	$ 4	$ 0
Other Current Assets [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Net	0	1
Other Noncurrent Assets [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Net	4	0
Other Noncurrent Assets [Member] | Designated as Hedging Instrument [Member] | Net Investment Hedging [Member] | Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Net	6	0
Other Comprehensive Income [Member] | Designated as Hedging Instrument [Member] | Net Investment Hedging [Member] | Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Net	14	0
Other Comprehensive Income [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Natural Gas, Electricity, and Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Loss Recognized in OCI, Effective Portion	5	7
Other Comprehensive Income [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Loss Recognized in OCI, Effective Portion	1	1
Accounts Payable and Accrued Liabilities [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Natural Gas, Electricity, and Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Net	5	8
Accounts Payable and Accrued Liabilities [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Net	0	1
Accounts Payable and Accrued Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Natural Gas Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Net	1	0
Accounts Payable and Accrued Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Net	0	2
Other Liabilities [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Net	$ 0	$ (3)

DERIVATIVE FINANCIAL INSTRUME57

DERIVATIVE FINANCIAL INSTRUMENTS (NOTIONAL AMOUNTS) (Details) MMBTU in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015USD ($)MMBTU
Net Investment Hedging [Member] | Cross Currency Interest Rate Contract [Member] | Swap [Member]
Derivative [Line Items]
Notional amount (in US$)	$ 250
Fair Value Hedging [Member] | Interest Rate Swap [Member] | Swap [Member]
Derivative [Line Items]
Notional amount (in US$)	$ 100
U.S. Indexed Natural Gas Forward Swaps [Member] | Cash Flow Hedging [Member] | Energy Related Derivative [Member] | Swap [Member] | Natural Gas [Member]
Derivative [Line Items]
Notional amount (in MMBtu equivalent) | MMBTU	8
European Indexed Natural Gas Forward Swaps [Member] | Cash Flow Hedging [Member] | Energy Related Derivative [Member] | Swap [Member] | Natural Gas [Member]
Derivative [Line Items]
Notional amount (in MMBtu equivalent) | MMBTU	1
Non-designated Foreign Currency Exposure in U.S. Dollars Relative to Brazilian Real, Chinese Yuan, Indian Rupee, and South Korean Won [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Notional amount (in US$)	$ 129
Non-designated Foreign Currency Exposure in European Euro Relative to Russian Rubles and U.S. Dollars [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Notional amount (in US$)	$ 21

DERIVATIVE FINANCIAL INSTRUME58

DERIVATIVE FINANCIAL INSTRUMENTS (INCOME STMT) (DETAIL) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cost of Sales [Member] | Designated as Hedging Instrument [Member] | Natural Gas and Electricity Contract [Member]
Derivative Instruments Gain Loss [Line Items]
Derivative Instruments, Loss Reclassified from Accumulated OCI Into Income, Effective Portion		$ 10	$ 0	$ 1
Interest Expense [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative Instruments Gain Loss [Line Items]
Derivative Instruments, Loss Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing		0	0	(1)
Other Expense [Member] | Not Designated as Hedging Instrument [Member] | Natural Gas and Electricity Contract [Member]
Derivative Instruments Gain Loss [Line Items]
Derivative Instruments, Loss Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing		1	1	0
Other Expense [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivative Instruments Gain Loss [Line Items]
Derivative Instruments, Loss Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing	[1]	$ (6)	$ 1	$ 12
[1]	(Gains) / losses related to foreign currency derivatives were substantially offset by net revaluation impacts on foreign denominated balance sheet exposures, which were also recorded in Other (income) expenses, net.

DERIVATIVE FINANCIAL INSTRUME59

DERIVATIVE FINANCIAL INSTRUMENTS NARRATIVE (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015USD ($)
Derivative [Line Items]
Derivative Instruments, Loss Recognized in Income	$ 6
Natural Gas Contract [Member]
Derivative [Line Items]
Derivative, Remaining Maturity	15 months
Two Months [Member] | Natural Gas Contract [Member]
Derivative [Line Items]
Percent Of Exposures Hedged	0.75
Exposure Time	2 months
Four Months [Member] | Natural Gas Contract [Member]
Derivative [Line Items]
Percent Of Exposures Hedged	0.6
Exposure Time	4 months
Current Year [Member] | Electricity Contract [Member]
Derivative [Line Items]
Percent Of Exposures Hedged	0.75
Following Year [Member] | Electricity Contract [Member]
Derivative [Line Items]
Percent Of Exposures Hedged	0.65

GOODWILL AND OTHER INTANGIBLE60

GOODWILL AND OTHER INTANGIBLE ASSETS (DETAIL) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,194	$ 1,190
Accumulated Amortization	(195)	(173)
Net Carrying Amount	999	1,017
Goodwill	1,167	$ 1,168
2,015	22
2,016	22
2,017	22
2,018	22
2,019	$ 22
Other Intangible Assets [Member]
Intangible Assets [Line Items]
Weighted Average Useful Life	25 years
Customer Relationships [Member]
Intangible Assets [Line Items]
Weighted Average Useful Life	20 years	19 years
Gross Carrying Amount	$ 172	$ 172
Accumulated Amortization	(82)	(72)
Net Carrying Amount	$ 90	$ 100
Technology [Member]
Intangible Assets [Line Items]
Weighted Average Useful Life	21 years	20 years
Gross Carrying Amount	$ 193	$ 193
Accumulated Amortization	(93)	(83)
Net Carrying Amount	$ 100	$ 110
Franchise Rights and Other Agreements [Member]
Intangible Assets [Line Items]
Weighted Average Useful Life	10 years	12 years
Gross Carrying Amount	$ 43	$ 39
Accumulated Amortization	(20)	(18)
Net Carrying Amount	23	21
Trademarks [Member]
Intangible Assets [Line Items]
Gross Carrying Amount	786	786
Accumulated Amortization	0	0
Net Carrying Amount	$ 786	$ 786

GOODWILL AND OTHER INTANGIBLE61

GOODWILL AND OTHER INTANGIBLE ASSETS (ROLLFORWARD) (DETAIL)	12 Months Ended
	Dec. 31, 2015USD ($)
Finite-lived Intangible Assets [Roll Forward]
Beginning Balance	$ 1,190,000,000
Additional Franchises and Agreements	4,000,000
Ending Balance	1,194,000,000
Goodwill [Roll Forward]
Beginning Balance	1,168,000,000
Acquisitions	(1,000,000)
Ending Balance	1,167,000,000
Composites [Member]
Goodwill [Roll Forward]
Beginning Balance	57,000,000
Acquisitions	(1,000,000)
Ending Balance	56,000,000
Insulation [Member]
Goodwill [Roll Forward]
Beginning Balance	888,000,000
Acquisitions	0
Ending Balance	888,000,000
Roofing [Member]
Goodwill [Roll Forward]
Beginning Balance	223,000,000
Acquisitions	0
Ending Balance	223,000,000
Customer Relationships [Member]
Finite-lived Intangible Assets [Roll Forward]
Beginning Balance	172,000,000
Additional Franchises and Agreements	0
Ending Balance	172,000,000
Technology-Based Intangible Assets [Member]
Finite-lived Intangible Assets [Roll Forward]
Beginning Balance	193,000,000
Additional Franchises and Agreements	0
Ending Balance	193,000,000
Franchise Rights and Other Agreements [Member]
Finite-lived Intangible Assets [Roll Forward]
Beginning Balance	39,000,000
Additional Franchises and Agreements	4,000,000
Ending Balance	43,000,000
Trademarks [Member]
Finite-lived Intangible Assets [Roll Forward]
Beginning Balance	786,000,000
Additional Franchises and Agreements	0
Ending Balance	$ 786,000,000

PROPERTY, PLANT AND EQUIPMENT62

PROPERTY, PLANT AND EQUIPMENT (DETAIL) $ in Millions	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Property Plant And Equipment [Line Items]
Property, Plant, And Equipment, Gross	$ 4,811	$ 4,623
Accumulated depreciation	(1,855)	(1,724)
Property, plant and equipment, net	$ 2,956	$ 2,899
Precious Metals Percentage	0.15	0.15
Precious Metals Depletion Percentage	3.00%
Land [Member]
Property Plant And Equipment [Line Items]
Property, Plant, And Equipment, Gross	$ 186	$ 196
Buildings and Leasehold Improvements [Member]
Property Plant And Equipment [Line Items]
Property, Plant, And Equipment, Gross	788	789
Machinery and Equipment [Member]
Property Plant And Equipment [Line Items]
Property, Plant, And Equipment, Gross	3,478	3,405
Construction in Progress [Member]
Property Plant And Equipment [Line Items]
Property, Plant, And Equipment, Gross	$ 359	$ 233

OPERATING LEASES (DETAIL)

OPERATING LEASES (DETAIL) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
OperatingLeasesFutureMinimumPaymentsDueAbstract
Operating Lease Rent Expense	$ 88	$ 91	$ 83
2,016	58
2,017	45
2,018	31
2,019	24
2,020	15
2021 and beyond	$ 43

ACCOUNTS PAYABLE AND ACCRUED 64

ACCOUNTS PAYABLE AND ACCRUED LIABILITIES (DETAILS) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Accounts Payable and Accrued Liabilities [Abstract]
Accounts payable	$ 535	$ 542
Payroll, vacation pay and incentive compensation	153	112
Payroll, property and other taxes	110	93
Other employee benefits liabilities	38	38
Dividends payable	21	19
Warranties (current portion)	14	17
Deferred revenue	9	20
Legal and audit fees	7	8
Accrued interest	7	9
Charges related to cost reduction actions	7	36
Other	47	55
Accounts payable and accrued liabilities	$ 948	$ 949

WARRANTIES (DETAIL)

WARRANTIES (DETAIL) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Movement In Standard And Extended Product Warranty Increase Decrease [Roll Forward]
Product warranty accrual, beginning balance	$ 40	$ 41
Amounts accrued for current year	15	25
Settlements of warranty claims	(12)	(26)
Product warranty accrual, ending balance	$ 43	$ 40

COST REDUCTION ACTIONS (DETAIL)

COST REDUCTION ACTIONS (DETAIL) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restructuring Reserve Roll Forward
Costs Incurred	$ (6)	$ 37	$ 8
Restructuring Reserve, Settled without Cash	3
Japan Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Other costs related to restructuring	8
Employee Severance [Member]
Restructuring Reserve Roll Forward
Restructuring Reserve, Settled without Cash	0
Contract Termination [Member]
Restructuring Reserve Roll Forward
Restructuring Reserve, Settled without Cash	0
Curtailment and Settlement [Member]
Restructuring Reserve Roll Forward
Costs Incurred	(3)
Cost Reductions Actions 2014 [Member]
Restructuring Reserve Roll Forward
Beginning Balance	34
Costs Incurred	(6)
Payments	23
Foreign Currency Translation	(1)
Ending Balance	7	34
Cumulative Charges Incurred	33
Cost Reductions Actions 2014 [Member] | Employee Severance [Member]
Restructuring Reserve Roll Forward
Beginning Balance	31
Costs Incurred	(3)
Payments	21
Foreign Currency Translation	(1)
Ending Balance	6	31
Cumulative Charges Incurred	33
Cost Reductions Actions 2014 [Member] | Contract Termination [Member]
Restructuring Reserve Roll Forward
Beginning Balance	3
Costs Incurred	0
Payments	2
Foreign Currency Translation	0
Ending Balance	1	3
Cumulative Charges Incurred	3
Cost Reductions Actions 2014 [Member] | Curtailment and Settlement [Member]
Restructuring Reserve Roll Forward
Beginning Balance	0
Costs Incurred	(3)
Payments	0
Foreign Currency Translation	0
Ending Balance	0	$ 0
Cumulative Charges Incurred	(3)
Restructuring Reserve, Settled without Cash	$ 3

DEBT (DETAIL)

DEBT (DETAIL) - USD ($)	Nov. 12, 2014	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Nov. 30, 2015	Oct. 31, 2015	Jun. 28, 2013	Oct. 17, 2012	Dec. 31, 2011	Jun. 03, 2009	Oct. 31, 2006
Long-Term Debt [Line Items]
Fair Value Adjustment to Debt		$ 6,000,000				$ 8,000,000				$ 6,000,000	$ 8,000,000
Debt and Capital Lease Obligations		1,865,000,000				1,981,000,000				1,865,000,000	1,981,000,000
Long Term Debt Current		163,000,000				3,000,000				163,000,000	3,000,000
Long Term Debt Noncurrent		1,702,000,000				1,978,000,000				1,702,000,000	1,978,000,000
Repayments of Long-term Debt										8,000,000	402,000,000	$ 2,000,000
Interest Rate Swap Agreement Principal Amount															$ 100,000,000
Long-term Debt, Gross		1,904,000,000								1,904,000,000
Reduction In Capital Lease Obligation										10,000,000
(Gain) loss on extinguishment of debt		0	$ 0	$ 5,000,000	$ 0	46,000,000	$ 0	$ 0	$ 0	5,000,000	(46,000,000)	$ 0
Short-term Debt [Abstract]
Short-term debt		$ 6,000,000				$ 31,000,000				$ 6,000,000	$ 31,000,000
Short Term Debt, Weighted Average Interest Rate		4.50%				7.20%				4.50%	7.20%
Maturities of Long-term Debt [Abstract]
2,016		$ 164,000,000								$ 164,000,000
2,017		6,000,000								6,000,000
2,018		6,000,000								6,000,000
2,019		150,000,000								150,000,000
2,020		6,000,000								6,000,000
2021 and beyond		1,572,000,000								1,572,000,000
Senior Notes Due 2016 [Member]
Long-Term Debt [Line Items]
Long Term Debt		$ 158,000,000				$ 158,000,000				$ 158,000,000	$ 158,000,000
Long Term Debt Current	$ 242,000,000															$ 250,000,000
Debt Instrument Face Amount																			$ 650,000,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		6.50%				6.50%				6.50%	6.50%						6.50%
Debt Instrument, Redemption Price, Percentage										111.46%
Interest Expense, Long-term Debt	7,000,000
Maturities of Long-term Debt [Abstract]
Long Term Debt		$ 158,000,000				$ 158,000,000				$ 158,000,000	$ 158,000,000
Senior Notes Due 2019 [Member]
Long-Term Debt [Line Items]
Long Term Debt		$ 143,000,000				$ 142,000,000				$ 143,000,000	$ 142,000,000
Long Term Debt Current	105,000,000															100,000,000
Debt Instrument Face Amount																		$ 350,000,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		9.00%				9.00%				9.00%	9.00%
Debt Instrument, Redemption Price, Percentage										122.98%
Repayments of Long-term Debt										$ 52,000,000
Maturities of Long-term Debt [Abstract]
Long Term Debt		$ 143,000,000				$ 142,000,000				143,000,000	$ 142,000,000
Senior Notes Due 2019 [Member] | Gains (Losses) on Extinguishment of Debt [Member]
Long-Term Debt [Line Items]
Interest Expense, Long-term Debt	4,000,000
Unamortized Discount and Fee Amount	2,000,000
Tender Fee Amount	1,000,000
Senior Notes Due 2022 [Member]
Long-Term Debt [Line Items]
Long Term Debt		$ 596,000,000				$ 596,000,000				$ 596,000,000	$ 596,000,000
Debt Instrument Face Amount																$ 600,000,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		4.20%				4.20%				4.20%	4.20%				4.20%
Maturities of Long-term Debt [Abstract]
Long Term Debt		$ 596,000,000				$ 596,000,000				$ 596,000,000	$ 596,000,000
Senior Notes Due 2024 [Member]
Long-Term Debt [Line Items]
Long Term Debt		$ 390,000,000				$ 388,000,000				$ 390,000,000	$ 388,000,000
Debt Instrument Face Amount	400,000,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		4.20%				4.20%				4.20%	4.20%
Payments of Financing Costs	$ 4,000,000
Maturities of Long-term Debt [Abstract]
Long Term Debt		$ 390,000,000				$ 388,000,000				$ 390,000,000	$ 388,000,000
Senior Notes Due 2036 [Member]
Long-Term Debt [Line Items]
Long Term Debt		$ 536,000,000				$ 536,000,000				$ 536,000,000	$ 536,000,000
Debt Instrument Face Amount																			$ 540,000,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		7.00%				7.00%				7.00%	7.00%
Maturities of Long-term Debt [Abstract]
Long Term Debt		$ 536,000,000				$ 536,000,000				$ 536,000,000	$ 536,000,000
Letter of Credit Under Receivables Purchase Agreement [Member]
Long-Term Debt [Line Items]
Long Term Debt		0				106,000,000				0	106,000,000
Long Term Debt Current		250,000,000								250,000,000
Long-term Line of Credit		0								0
Letters of Credit Outstanding, Amount		2,000,000								2,000,000
Available borrowing capacity		228,000,000								228,000,000
Maturities of Long-term Debt [Abstract]
Long Term Debt		0				106,000,000				0	106,000,000
Senior Revolving Credit Facility B [Member]
Long-Term Debt [Line Items]
Long-term Line of Credit		0								0
Letters of Credit Outstanding, Amount		9,000,000								9,000,000
Available borrowing capacity		791,000,000								791,000,000
Capital Lease Obligations [Member]
Long-Term Debt [Line Items]
Long Term Debt		36,000,000				47,000,000				36,000,000	47,000,000
Maturities of Long-term Debt [Abstract]
Long Term Debt		36,000,000				47,000,000				36,000,000	47,000,000
Long-term Debt, Net of Current Portion [Member]
Long-Term Debt [Line Items]
Unamortized Debt Issuance Expense		12,000,000				$ 13,000,000				12,000,000	$ 13,000,000
Long-term Debt, Current Portion [Member] | Senior Notes Due 2016 [Member]
Long-Term Debt [Line Items]
Unamortized Debt Issuance Expense		2,000,000								2,000,000
Long Term Debt		158,000,000								158,000,000
Maturities of Long-term Debt [Abstract]
Long Term Debt		$ 158,000,000								$ 158,000,000
Revolving Credit Facility [Member]
Long-Term Debt [Line Items]
Borrowing capacity under credit facility														$ 800,000,000
Borrowing capacity available for uncommitted incremental loans													$ 600,000,000	$ 200,000,000

PENSION PLANS (DETAIL)

PENSION PLANS (DETAIL) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Target Plan Asset Allocations, Period	20 years
Defined Benefit Plans, Accumulated Other Comprehensive Income (Loss), After Tax [Abstract]
Defined Benefit Plan, Target Plan Asset Allocations Range Amount	25.00%
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation at Beginning of Period	$ 1,193,000,000	$ 1,070,000,000
Defined Benefit Plan, Service Cost	8,000,000	8,000,000
Defined Benefit Plan, Interest Cost	44,000,000	48,000,000
Defined Benefit Plan, Actuarial (Gain) Loss	(50,000,000)	159,000,000
Defined Benefit Plan, Currency (Gain) Loss	0	0
Defined Benefit Plan, Benefits Paid	(101,000,000)	(92,000,000)
Defined Benefit Plan, Settlements / Curtailments	0	0
Defined Benefit Plan, Other	(2,000,000)	0
Benefit Obligation at End of Period	1,092,000,000	1,193,000,000	$ 1,070,000,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	883,000,000	858,000,000
Defined Benefit Plan, Actual Return on Plan Assets	(23,000,000)	82,000,000
Defined Benefit Plan, Currency Gain (Loss)	0	0
Defined Benefit Plan, Company Contributions	47,000,000	36,000,000
Defined Benefit Plan, Benefits Paid	(101,000,000)	(92,000,000)
Defined Benefit Plan, Settlements/Curtailments	0	0
Defined Benefit Plan, Other	0	(1,000,000)
Fair Value of Assets at End of Period	806,000,000	883,000,000	$ 858,000,000
Defined Benefit Plan, Funded Status of Plan	(286,000,000)	(310,000,000)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Defined Benefit Plan, Prepaid Pension Cost	0	0
Defined Benefit Plan, Accrued Pension Cost - Current	0	(1,000,000)
Defined Benefit Plan, Accrued Pension Cost - Noncurrent	(286,000,000)	(309,000,000)
Defined Benefit Plan, Net Amount Recognized	(286,000,000)	(310,000,000)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax [Abstract]
Defined Benefit, Net Actuarial Loss	(431,000,000)	(415,000,000)
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Projected Benefit Obligation	1,092,000,000	1,193,000,000
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Accumulated Benefit Obligation	1,092,000,000	1,193,000,000
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Fair Value of Plan Assets	806,000,000	883,000,000
Defined Benefit Plan, Plans with Plan Assets in Excess of Accumulated Benefit Obligations [Abstract]
Defined Benefit Plan, Pension Plans with Plan Assets in Excess of Accumulated Benefit Obligations, Projected Benefit Obligation	0	0
Defined Benefit Plan, Pension Plans with Plan Assets in Excess of Accumulated Benefit Obligations, Accumulated Benefit Obligation	0	0
Defined Benefit Plan, Pension Plans with Plan Assets in Excess of Accumulated Benefit Obligations, Fair Value of Plan Assets	0	0
Defined Benefit Plan, Accumulated Benefit Obligation	$ 1,092,000,000	$ 1,193,000,000
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.20%	3.85%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Expected Return on Assets	7.00%	7.00%
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Service Cost	$ 8,000,000	$ 8,000,000
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.85%	4.65%	3.80%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Return on Assets	7.00%	7.00%	7.50%
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Percentage of Assets Invested in Equity	38.00%
Percentage of Assets Invested in Real Estate	3.00%
Percentage of Assets Invested in Real Assets	6.00%
Percentage of Assets Invested in Intermediate and Long-term Fixed income Securities	47.00%
Percentage of Assets Invested in Absolute Return Securities	6.00%
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Estimated Future Employer Contributions in Next Fiscal Year	$ 50,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	537,000,000
Fair Value of Assets at End of Period	482,000,000	$ 537,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	346,000,000
Fair Value of Assets at End of Period	324,000,000	346,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Domestic Actively Managed [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	138,000,000
Fair Value of Assets at End of Period	121,000,000	138,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Domestic Actively Managed [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	99,000,000
Fair Value of Assets at End of Period	85,000,000	99,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Domestic Actively Managed [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	39,000,000
Fair Value of Assets at End of Period	36,000,000	39,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Domestic Actively Managed [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Domestic Passive Index [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	61,000,000
Fair Value of Assets at End of Period	51,000,000	61,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Domestic Passive Index [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Domestic Passive Index [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	61,000,000
Fair Value of Assets at End of Period	51,000,000	61,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Domestic Passive Index [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | International Actively Managed [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	115,000,000
Fair Value of Assets at End of Period	110,000,000	115,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | International Actively Managed [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	81,000,000
Fair Value of Assets at End of Period	79,000,000	81,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | International Actively Managed [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	34,000,000
Fair Value of Assets at End of Period	31,000,000	34,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | International Actively Managed [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | International Passive Index [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	26,000,000
Fair Value of Assets at End of Period	23,000,000	26,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | International Passive Index [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | International Passive Index [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	26,000,000
Fair Value of Assets at End of Period	23,000,000	26,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | International Passive Index [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Cash [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	2,000,000
Fair Value of Assets at End of Period	1,000,000	2,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Cash [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	2,000,000
Fair Value of Assets at End of Period	1,000,000	2,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Cash [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Cash [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Short-term Debt [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	26,000,000
Fair Value of Assets at End of Period	33,000,000	26,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Short-term Debt [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Short-term Debt [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	26,000,000
Fair Value of Assets at End of Period	33,000,000	26,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Short-term Debt [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Corporate bonds [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	284,000,000
Fair Value of Assets at End of Period	256,000,000	284,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Corporate bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	229,000,000
Fair Value of Assets at End of Period	204,000,000	229,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Corporate bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	55,000,000
Fair Value of Assets at End of Period	52,000,000	55,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Corporate bonds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Government Debt [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	98,000,000
Fair Value of Assets at End of Period	88,000,000	98,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Government Debt [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	98,000,000
Fair Value of Assets at End of Period	88,000,000	98,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Government Debt [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Government Debt [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Real Estate Investment Trusts [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	28,000,000
Fair Value of Assets at End of Period	25,000,000	28,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Real Estate Investment Trusts [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	28,000,000
Fair Value of Assets at End of Period	25,000,000	28,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Real Estate Investment Trusts [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Real Estate Investment Trusts [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Absolute Return Strategies [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	55,000,000
Fair Value of Assets at End of Period	52,000,000	55,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Absolute Return Strategies [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Absolute Return Strategies [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	55,000,000
Fair Value of Assets at End of Period	52,000,000	55,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Absolute Return Strategies [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Real Assets [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	50,000,000
Fair Value of Assets at End of Period	46,000,000	50,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Real Assets [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Real Assets [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	50,000,000
Fair Value of Assets at End of Period	46,000,000	50,000,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Real Assets [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation at Beginning of Period	571,000,000	546,000,000
Defined Benefit Plan, Service Cost	4,000,000	5,000,000
Defined Benefit Plan, Interest Cost	19,000,000	23,000,000
Defined Benefit Plan, Actuarial (Gain) Loss	(19,000,000)	63,000,000
Defined Benefit Plan, Currency (Gain) Loss	(55,000,000)	(44,000,000)
Defined Benefit Plan, Benefits Paid	(21,000,000)	(23,000,000)
Defined Benefit Plan, Settlements / Curtailments	(7,000,000)	(2,000,000)
Defined Benefit Plan, Other	(7,000,000)	3,000,000
Benefit Obligation at End of Period	485,000,000	571,000,000	$ 546,000,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	437,000,000	422,000,000
Defined Benefit Plan, Actual Return on Plan Assets	2,000,000	50,000,000
Defined Benefit Plan, Currency Gain (Loss)	(46,000,000)	(35,000,000)
Defined Benefit Plan, Company Contributions	13,000,000	16,000,000
Defined Benefit Plan, Benefits Paid	(21,000,000)	(23,000,000)
Defined Benefit Plan, Settlements/Curtailments	(7,000,000)	(2,000,000)
Defined Benefit Plan, Other	1,000,000	9,000,000
Fair Value of Assets at End of Period	379,000,000	437,000,000	$ 422,000,000
Defined Benefit Plan, Funded Status of Plan	(106,000,000)	(134,000,000)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Defined Benefit Plan, Prepaid Pension Cost	6,000,000	5,000,000
Defined Benefit Plan, Accrued Pension Cost - Current	(1,000,000)	(1,000,000)
Defined Benefit Plan, Accrued Pension Cost - Noncurrent	(111,000,000)	(138,000,000)
Defined Benefit Plan, Net Amount Recognized	(106,000,000)	(134,000,000)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax [Abstract]
Defined Benefit, Net Actuarial Loss	(96,000,000)	(107,000,000)
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Projected Benefit Obligation	314,000,000	464,000,000
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Accumulated Benefit Obligation	311,000,000	448,000,000
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Fair Value of Plan Assets	206,000,000	328,000,000
Defined Benefit Plan, Plans with Plan Assets in Excess of Accumulated Benefit Obligations [Abstract]
Defined Benefit Plan, Pension Plans with Plan Assets in Excess of Accumulated Benefit Obligations, Projected Benefit Obligation	171,000,000	107,000,000
Defined Benefit Plan, Pension Plans with Plan Assets in Excess of Accumulated Benefit Obligations, Accumulated Benefit Obligation	156,000,000	99,000,000
Defined Benefit Plan, Pension Plans with Plan Assets in Excess of Accumulated Benefit Obligations, Fair Value of Plan Assets	173,000,000	109,000,000
Defined Benefit Plan, Accumulated Benefit Obligation	$ 467,000,000	$ 547,000,000
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.88%	3.60%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Expected Return on Assets	6.23%	6.27%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	3.97%	4.01%
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Service Cost	$ 4,000,000	$ 5,000,000
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.60%	4.45%	4.10%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Return on Assets	6.27%	6.38%	6.13%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	4.01%	3.94%	3.50%
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Estimated Future Employer Contributions in Next Fiscal Year	$ 13,000,000
Foreign Pension Plans, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	41,000,000	$ 0
Foreign Pension Plans, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	437,000,000
Fair Value of Assets at End of Period	338,000,000	437,000,000
Foreign Pension Plans, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
Foreign Pension Plans, Defined Benefit [Member] | Domestic Actively Managed [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	30,000,000
Fair Value of Assets at End of Period	24,000,000	30,000,000
Foreign Pension Plans, Defined Benefit [Member] | Domestic Actively Managed [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
Foreign Pension Plans, Defined Benefit [Member] | Domestic Actively Managed [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	30,000,000
Fair Value of Assets at End of Period	24,000,000	30,000,000
Foreign Pension Plans, Defined Benefit [Member] | Domestic Actively Managed [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
Foreign Pension Plans, Defined Benefit [Member] | Domestic Passive Index [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	1,000,000	0
Foreign Pension Plans, Defined Benefit [Member] | Domestic Passive Index [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
Foreign Pension Plans, Defined Benefit [Member] | Domestic Passive Index [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	1,000,000	0
Foreign Pension Plans, Defined Benefit [Member] | Domestic Passive Index [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
Foreign Pension Plans, Defined Benefit [Member] | International Actively Managed [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	52,000,000
Fair Value of Assets at End of Period	62,000,000	52,000,000
Foreign Pension Plans, Defined Benefit [Member] | International Actively Managed [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	39,000,000	0
Foreign Pension Plans, Defined Benefit [Member] | International Actively Managed [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	52,000,000
Fair Value of Assets at End of Period	23,000,000	52,000,000
Foreign Pension Plans, Defined Benefit [Member] | International Actively Managed [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
Foreign Pension Plans, Defined Benefit [Member] | International Passive Index [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	35,000,000
Fair Value of Assets at End of Period	25,000,000	35,000,000
Foreign Pension Plans, Defined Benefit [Member] | International Passive Index [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
Foreign Pension Plans, Defined Benefit [Member] | International Passive Index [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	35,000,000
Fair Value of Assets at End of Period	25,000,000	35,000,000
Foreign Pension Plans, Defined Benefit [Member] | International Passive Index [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
Foreign Pension Plans, Defined Benefit [Member] | Cash [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	29,000,000
Fair Value of Assets at End of Period	26,000,000	29,000,000
Foreign Pension Plans, Defined Benefit [Member] | Cash [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	2,000,000	0
Foreign Pension Plans, Defined Benefit [Member] | Cash [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	29,000,000
Fair Value of Assets at End of Period	24,000,000	29,000,000
Foreign Pension Plans, Defined Benefit [Member] | Cash [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
Foreign Pension Plans, Defined Benefit [Member] | Corporate bonds [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	198,000,000
Fair Value of Assets at End of Period	149,000,000	198,000,000
Foreign Pension Plans, Defined Benefit [Member] | Corporate bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
Foreign Pension Plans, Defined Benefit [Member] | Corporate bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	198,000,000
Fair Value of Assets at End of Period	149,000,000	198,000,000
Foreign Pension Plans, Defined Benefit [Member] | Corporate bonds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
Foreign Pension Plans, Defined Benefit [Member] | Government Debt [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
Foreign Pension Plans, Defined Benefit [Member] | Government Debt [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
Foreign Pension Plans, Defined Benefit [Member] | Government Debt [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
Foreign Pension Plans, Defined Benefit [Member] | Government Debt [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
Foreign Pension Plans, Defined Benefit [Member] | Absolute Return Strategies [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	93,000,000
Fair Value of Assets at End of Period	92,000,000	93,000,000
Foreign Pension Plans, Defined Benefit [Member] | Absolute Return Strategies [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
Foreign Pension Plans, Defined Benefit [Member] | Absolute Return Strategies [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	93,000,000
Fair Value of Assets at End of Period	92,000,000	93,000,000
Foreign Pension Plans, Defined Benefit [Member] | Absolute Return Strategies [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	0
Fair Value of Assets at End of Period	0	0
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation at Beginning of Period	1,764,000,000	1,616,000,000
Defined Benefit Plan, Service Cost	12,000,000	13,000,000	$ 15,000,000
Defined Benefit Plan, Interest Cost	63,000,000	71,000,000	65,000,000
Defined Benefit Plan, Actuarial (Gain) Loss	(69,000,000)	222,000,000
Defined Benefit Plan, Currency (Gain) Loss	(55,000,000)	(44,000,000)
Defined Benefit Plan, Benefits Paid	(122,000,000)	(115,000,000)
Defined Benefit Plan, Settlements / Curtailments	(7,000,000)	(2,000,000)
Defined Benefit Plan, Other	(9,000,000)	3,000,000
Benefit Obligation at End of Period	1,577,000,000	1,764,000,000	1,616,000,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	1,320,000,000	1,280,000,000
Defined Benefit Plan, Actual Return on Plan Assets	(21,000,000)	132,000,000
Defined Benefit Plan, Currency Gain (Loss)	(46,000,000)	(35,000,000)
Defined Benefit Plan, Company Contributions	60,000,000	52,000,000
Defined Benefit Plan, Benefits Paid	(122,000,000)	(115,000,000)
Defined Benefit Plan, Settlements/Curtailments	(7,000,000)	(2,000,000)
Defined Benefit Plan, Other	1,000,000	8,000,000
Fair Value of Assets at End of Period	1,185,000,000	1,320,000,000	1,280,000,000
Defined Benefit Plan, Funded Status of Plan	(392,000,000)	(444,000,000)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Defined Benefit Plan, Prepaid Pension Cost	6,000,000	5,000,000
Defined Benefit Plan, Accrued Pension Cost - Current	(1,000,000)	(2,000,000)
Defined Benefit Plan, Accrued Pension Cost - Noncurrent	(397,000,000)	(447,000,000)
Defined Benefit Plan, Net Amount Recognized	(392,000,000)	(444,000,000)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax [Abstract]
Defined Benefit, Net Actuarial Loss	(527,000,000)	(522,000,000)
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Projected Benefit Obligation	1,406,000,000	1,657,000,000
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Accumulated Benefit Obligation	1,403,000,000	1,641,000,000
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Fair Value of Plan Assets	1,012,000,000	1,211,000,000
Defined Benefit Plan, Plans with Plan Assets in Excess of Accumulated Benefit Obligations [Abstract]
Defined Benefit Plan, Pension Plans with Plan Assets in Excess of Accumulated Benefit Obligations, Projected Benefit Obligation	171,000,000	107,000,000
Defined Benefit Plan, Pension Plans with Plan Assets in Excess of Accumulated Benefit Obligations, Accumulated Benefit Obligation	156,000,000	99,000,000
Defined Benefit Plan, Pension Plans with Plan Assets in Excess of Accumulated Benefit Obligations, Fair Value of Plan Assets	173,000,000	109,000,000
Defined Benefit Plan, Accumulated Benefit Obligation	1,559,000,000	1,740,000,000
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Service Cost	12,000,000	13,000,000	15,000,000
Defined Benefit Plan, Expected Return on Plan Assets	(84,000,000)	(84,000,000)	(84,000,000)
Defined Benefit Plan, Amortization of (Gains) Losses	18,000,000	11,000,000	20,000,000
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	(3,000,000)	0	0
Defined Benefit Plan, Other Costs	1,000,000	0	0
Defined Benefit Plan, Net Periodic Benefit Cost	7,000,000	11,000,000	16,000,000
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
2,016	98,000,000
2,017	97,000,000
2,018	95,000,000
2,019	97,000,000
2,020	98,000,000
2021-2024	476,000,000
Pension Plans, Defined Benefit [Member] | Other Comprehensive Income [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Interest Cost	16,000,000
Defined Benefit Plans, Accumulated Other Comprehensive Income (Loss), After Tax [Abstract]
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Gains (Losses), after Tax	(527,000,000)
Scenario, Adjustment [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation at Beginning of Period	7,000,000
Benefit Obligation at End of Period		7,000,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Period	$ 7,000,000
Fair Value of Assets at End of Period		7,000,000
Defined Benefit Plan, Funded Status of Plan		0
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Contribution Plan Disclosure [Line Items]
Company Match Regardless of Employee Contribution	2.00%
Cost Recognized Related to Defined Benefit Plans	$ 33,000,000	$ 34,000,000	$ 29,000,000

POSTEMPLOYMENT AND POSTRETIRE69

POSTEMPLOYMENT AND POSTRETIREMENT BENEFITS OTHER THAN PENSIONS (DETAIL) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Employee Eligible Age	10 years
Defined Benefit Plan, Qualifying Employee Age, Scenario 1	45 years
Defined Benefit Plan, Qualifying Employee Age, Scenario 2	48 years
Defined Benefit Plan, Qualifying Employee Age, Scenario 3	50 years
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation at Beginning of Period	$ 238	$ 228
Defined Benefit Plan, Service Cost	2	2
Defined Benefit Plan, Interest Cost	8	9
Defined Benefit Plan, Actuarial Loss (Gain)	(3)	17
Defined Benefit Plan, Currency Loss (Gain)	0	0
Defined Benefit Plan, Plan Amendments	0	0
Defined Benefit Plan, Benefits Paid	(15)	(18)
Defined Benefit Plan, Other	0	0
Benefit Obligation at End of Period	230	238	$ 228
Defined Benefit Plan, Funded Status of Plan	(230)	(238)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Pension and Other Postretirement Defined Benefit Plans, Accrued Benefit Obligation - Current	(17)	(18)
Pension and Other Postretirement Defined Benefit Plans, Accrued Benefit Obligation - Noncurrent	(213)	(220)
Defined Benefit Plan, Net Amount Recognized	(230)	(238)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax [Abstract]
Defined Benefit Plan, Net Actuarial Gain	(4)	(20)
Defined Benefit Plan, Net Prior Service Credit	(17)	(2)
Defined Benefit Plan, Net Amount Recognized	$ (21)	$ (22)
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.00%	3.70%
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Service Cost	$ 2	$ 2
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.70%	4.35%	3.50%
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]
Defined Benefit Plan, Health Care Cost Trend Initial Rate at End of Year	7.00%	7.00%	7.00%
Defined Benefit Plan, Health Care Cost Trend Ultimate Rate	5.00%	5.00%	5.00%
Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate	2,025	2,024	2,023
Foreign Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation at Beginning of Period	$ 16	$ 16
Defined Benefit Plan, Service Cost	0	0
Defined Benefit Plan, Interest Cost	1	1
Defined Benefit Plan, Actuarial Loss (Gain)	0	0
Defined Benefit Plan, Currency Loss (Gain)	(2)	(1)
Defined Benefit Plan, Plan Amendments	0	0
Defined Benefit Plan, Benefits Paid	(1)	(1)
Defined Benefit Plan, Other	(1)	1
Benefit Obligation at End of Period	13	16	$ 16
Defined Benefit Plan, Funded Status of Plan	(13)	(16)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Pension and Other Postretirement Defined Benefit Plans, Accrued Benefit Obligation - Current	(1)	(1)
Pension and Other Postretirement Defined Benefit Plans, Accrued Benefit Obligation - Noncurrent	(12)	(15)
Defined Benefit Plan, Net Amount Recognized	(13)	(16)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax [Abstract]
Defined Benefit Plan, Net Actuarial Gain	(4)	0
Defined Benefit Plan, Net Prior Service Credit	0	(5)
Defined Benefit Plan, Net Amount Recognized	$ (4)	$ (5)
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.80%	3.70%
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Service Cost	$ 0	$ 0
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.70%	4.45%	3.80%
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]
Defined Benefit Plan, Health Care Cost Trend Initial Rate at End of Year	5.25%	5.43%	6.23%
Defined Benefit Plan, Health Care Cost Trend Ultimate Rate	4.70%	4.70%	4.79%
Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate	2,019	2,019	2,019
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation at Beginning of Period	$ 254	$ 244
Defined Benefit Plan, Service Cost	2	2	$ 3
Defined Benefit Plan, Interest Cost	9	10	9
Defined Benefit Plan, Actuarial Loss (Gain)	(3)	17
Defined Benefit Plan, Currency Loss (Gain)	(2)	(1)
Defined Benefit Plan, Plan Amendments	0	0
Defined Benefit Plan, Benefits Paid	(16)	(19)
Defined Benefit Plan, Other	(1)	1
Benefit Obligation at End of Period	243	254	244
Defined Benefit Plan, Funded Status of Plan	(243)	(254)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Pension and Other Postretirement Defined Benefit Plans, Accrued Benefit Obligation - Current	(18)	(19)
Pension and Other Postretirement Defined Benefit Plans, Accrued Benefit Obligation - Noncurrent	(225)	(235)
Defined Benefit Plan, Net Amount Recognized	(243)	(254)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax [Abstract]
Defined Benefit Plan, Net Actuarial Gain	(8)	(20)
Defined Benefit Plan, Net Prior Service Credit	(17)	(7)
Defined Benefit Plan, Net Amount Recognized	(25)	(27)
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Service Cost	2	2	3
Defined Benefit Plan, Amortization of Prior Service Cost	(4)	(4)	(4)
Defined Benefit Plan, Amortization of (Gains) Losses	(1)	(2)	(1)
Defined Benefit Plan, Net Periodic Benefit Cost	7	6	7
Defined Benefit Plan, Other Costs	1	0	0
Defined Benefit Plan, Effect of One Percentage Point Change in Assumed Health Care Cost Trend Rates [Abstract]
Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components	0
Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components	0
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation	9
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation	(8)
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
2,016	19
2,017	19
2,018	20
2,019	19
2,020	19
2021-2025	88
Postemployment Benefits [Abstract]
Postemployment Benefits Liability	15	17
Postemployment Benefits, Period Expense	1	$ 1	$ 1
Other Postretirement Benefit Plans, Defined Benefit [Member] | Other Comprehensive Income [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Interest Cost	4
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Gains (Losses), after Tax	$ 25

CONTINGENT LIABILITIES AND OT70

CONTINGENT LIABILITIES AND OTHER MATTERS (DETAIL) $ in Millions	12 Months Ended
	Dec. 31, 2015USD ($)site
Unusual or Infrequent Item [Line Items]
Environmental Liability Sites	19
Environmental Liabilities Reserve | $	$ 3
Superfund Sites [Member]
Unusual or Infrequent Item [Line Items]
Environmental Liability Sites	6
Owned or Fomerly Owned Sites [Member]
Unusual or Infrequent Item [Line Items]
Environmental Liability Sites	13

STOCK COMPENSATION (DETAIL)

STOCK COMPENSATION (DETAIL) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	Jan. 29, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Apr. 18, 2013
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Roll Forward
Options, Outstanding, Number, Beginning Balance	1,953,320	2,754,895	2,748,720	3,025,220
Options, Outstanding, Number, Grants In Period		0	374,500	329,800
Options, Outstanding, Number, Options Exercised		(691,375)	(328,875)	(549,800)
Options, Outstanding, Number, Forfeitures In Period		(105,100)	(35,400)	(56,500)
Options, Outstanding, Number, Expirations In Period		(5,100)	(4,050)	0
Options, Outstanding, Number, Ending Balance		1,953,320	2,754,895	2,748,720
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Options, Outstanding, Weighted Average Exercise Price, Beginning of Period	$ 31.09	$ 31.04	$ 29.55	$ 27.78
Options, Outstanding, Grants In Period Weighted Average Exercise Price		0	37.65	42.16
Options, Outstanding, Exercises In Period Weighted Average Exercise Price		29.75	25.23	26.88
Options, Outstanding, Forfeitures In Period Weighted Average Exercise Price		38.09	38.09	34.58
Options, Outstanding, Expirations In Period Weighted Average Exercise Price		41.89	34.50	0
Options, Outstanding, Weighted Average Exercise Price, End of Period		31.09	$ 31.04	$ 29.55
Minimum [Member]
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercisable Options, Weighted Average Exercise Price		13.89
Maximum [Member]
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercisable Options, Weighted Average Exercise Price		$ 42.16
Stock Plan 2013 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Available for Grant		2,000,000
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options Maximum Term		10 years
Fair Value Assumptions, Expected Volatility Rate			50.90%	45.30%
Fair Value Assumptions, Expected Dividend Rate			0.00%	0.00%
Fair Value Assumptions, Expected Term			6 years 3 months	6 years 3 months 4 days
Fair Value Assumptions, Risk Free Interest Rate			1.90%	1.10%
Allocated Share-based Compensation Expense		$ 4	$ 6	$ 5
Unrecognized Compensation Cost Related to Stock Options		$ 4
Weighted Average Period For Recognition of Compensation Cost		1 year 9 months 28 days
Intrinsic Value of Options Outstanding		$ 31	16	31
Intrinsic Value of Options Exercisable		28	15	27
Cash Received from Exercise of Stock Options		21	8	15
Tax Benefit Realized from Exercise of Stock Options		$ 4	$ 2	$ 3
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonoptions, Number, Grants In Period		0	374,500	329,800
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Nonoptions, Weighted Average Fair Value, Grants in Period			$ 19.05	$ 18.94
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated Share-based Compensation Expense		$ 17	$ 17	$ 16
Weighted Average Period For Recognition of Compensation Cost		2 years 6 months 24 days
Award Vesting Period		4 years
Total Unrecognized Compensation Cost Related to Restricted Stock		$ 26
Grants in Period Fair Value		$ 17	$ 15	$ 16
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonoptions, Number, Beginning Balance	1,707,490	1,727,741	1,735,824	1,875,065
Nonoptions, Number, Grants In Period		625,652	522,994	512,398
Nonoptions, Number, Vested In Period		(504,704)	(459,359)	(573,920)
Nonoptions, Number, Forfeited In Period		(141,199)	(71,718)	(77,719)
Nonoptions, Number, Ending Balance		1,707,490	1,727,741	1,735,824
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Nonoptions, Weighted Average Fair Value, Beginning Balance	$ 35.37	$ 33.58	$ 32.49	$ 27.14
Nonoptions, Weighted Average Fair Value, Grants in Period		39.75	36.72	41.01
Nonoptions, Weighted Average Fair Value, Vested		34.24	32.49	26
Nonoptions, Weighted Average Fair Value, Forfeited		38.20	37.17	34.62
Nonoptions, Weighted Average Fair Value, Ending Balance		$ 35.37	$ 33.58	$ 32.49
Performance Stock Units (PSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated Share-based Compensation Expense		$ 8	$ 6	$ 7
Weighted Average Period For Recognition of Compensation Cost		1 year 7 months 30 days
Total Unrecognized Compensation Cost Related to Restricted Stock		$ 12
Grants in Period Fair Value		$ 1	$ 1	$ 9
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonoptions, Number, Beginning Balance	431,400	416,250	410,500	412,910
Nonoptions, Number, Grants In Period		252,200	248,950	207,050
Nonoptions, Number, Vested In Period		(151,700)	(199,450)	(167,610)
Nonoptions, Number, Forfeited In Period		(85,350)	(43,750)	(41,850)
Nonoptions, Number, Ending Balance		431,400	416,250	410,500
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Nonoptions, Weighted Average Fair Value, Beginning Balance	$ 44.52	$ 49.53	$ 53.04	$ 49.14
Nonoptions, Weighted Average Fair Value, Grants in Period		43.88	44.43	56.71
Nonoptions, Weighted Average Fair Value, Vested		56.71	52.11	48.61
Nonoptions, Weighted Average Fair Value, Forfeited		48.66	41.71	50.39
Nonoptions, Weighted Average Fair Value, Ending Balance		$ 44.52	$ 49.53	$ 53.04
Performance Stock Units (PSUs) Stock 2014 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair Value Assumptions, Expected Volatility Rate			36.00%
Fair Value Assumptions, Expected Term			2 years 10 months 24 days
Fair Value Assumptions, Risk Free Interest Rate			0.68%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Deferred Compensation Arrangement with Individual, Requisite Service Period			3 years
Performance Stock Units (PSUs) Stock 2013 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair Value Assumptions, Expected Volatility Rate				36.70%
Fair Value Assumptions, Expected Term				2 years 10 months 24 days
Fair Value Assumptions, Risk Free Interest Rate				0.40%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Deferred Compensation Arrangement with Individual, Requisite Service Period				3 years
Employee Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Available for Grant					2,000,000
Total Unrecognized Compensation Cost Related to Restricted Stock		$ 1
Purchase Price, Percentage of Market Value					85.00%
Employee Emergence Equity Program Expense		$ 2	$ 2	$ 1
Shares Purchased by Employees		200,000	200,000	100,000
Average Price of Shares Purchased		$ 32.57	$ 34.10	$ 33.29
Employee Stock [Member] | Subsequent Event [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Value of Shares Purchased by Employees	$ 2
Performance Stock Units (PSUs) 2015 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair Value Assumptions, Expected Volatility Rate		29.20%
Fair Value Assumptions, Expected Term		2 years 10 months 25 days
Fair Value Assumptions, Risk Free Interest Rate		1.08%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Deferred Compensation Arrangement with Individual, Requisite Service Period		3 years
Internal Based Performance Metric [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award Vesting Period		3 years
Share-based Compensation Arrangement by Share-based Payment Award, Assumptions, Return on Invested Capital		3 years
Internal Based Performance Metric [Member] | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Outstanding Stock Maximum		0.00%
Internal Based Performance Metric [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Outstanding Stock Maximum		300.00%
External Based Performance Metric [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award Vesting Period		3 years
External Based Performance Metric [Member] | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Outstanding Stock Maximum		0.00%
External Based Performance Metric [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Outstanding Stock Maximum		200.00%
Exercise Price Range One [Member]
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Number of Outstanding Options		1,953,320
Outstanding Options, Weighted Average Remaining Contractual Term		4 years 4 months 13 days
Outstanding Options, Weighted Average Exercise Price		$ 31.09
Number of Exercisable Options		1,552,820
Exercisable Options, Weighted Average Remaining Contractual Term		3 years 6 months 21 days
Exercisable Options, Weighted Average Exercise Price		$ 29.20

ACCUMULATED OTHER COMPREHENSI72

ACCUMULATED OTHER COMPREHENSIVE INCOME (DETAIL) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 3,730	$ 3,830	$ 3,575
Net loss on foreign currency translation	(117)	(135)	(29)
Translation impact on non-US. Plans	(115)	(134)	(28)
Ending Balance	3,779	3,730	3,830
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(550)
Ending Balance	(670)	(550)
Pension and Other Postretirement Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(413)	(300)
(Gains) arising during the period	(28)	(192)
Income tax expense of amount classified into AOCI	5	68
Net (Gains) arising during the period	(23)	(124)
Amortization of actuarial loss	17	9
Amortization of prior service gain	(4)	(4)
Settlement gain	(3)	0
Income tax benefit of amounts reclassified from AOCI to income	(4)	(1)
Net amortization and gain reclassified from AOCI to net income	6	4
Translation impact on non-US. Plans	11	7
Other comprehensive (loss), net of tax	(6)	(113)
Ending Balance	(419)	(413)	(300)
Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(132)	2
Loss on foreign currency translation	(124)	(135)
Gain on net investment hedge	14	0
Income tax expense of amount classified into AOCI	(5)	0
Net loss on foreign currency translation	(115)	(135)
Loss reclassified from AOCI to income	0	1
Other comprehensive (loss), net of tax	(115)	(134)
Ending Balance	(247)	(132)	2
Deferred Gain (Loss) on Hedging
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(5)	1
Change in mark to market hedges	(8)	(9)
Income tax benefit of amount classified into AOCI	3	3
Net loss on derivative instruments	(5)	(6)
Amounts reclassified from AOCI to income	10	0
Income tax benefit of amounts reclassified from AOCI to income	(4)	0
Net gain reclassified from AOCI to net income	6	0
Other comprehensive (loss), net of tax	1	(6)
Ending Balance	$ (4)	$ (5)	$ 1

EARNINGS PER SHARE (DETAIL)

EARNINGS PER SHARE (DETAIL) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Apr. 19, 2012
Earnings Per Share [Abstract]
NET EARNINGS ATTRIBUTABLE TO OWENS CORNING	$ 109	$ 112	$ 91	$ 18	$ 33	$ 52	$ 21	$ 120	$ 330	$ 226	$ 204
Weighted-average number of shares outstanding used for basic earnings per share									117,200,000	117,500,000	118,200,000
Non-vested restricted and performance shares									600,000	400,000	400,000
Options to purchase common stock									400,000	400,000	500,000
Weighted-average number of shares outstanding and common equivalent shares used for diluted earnings per share									118,200,000	118,300,000	119,100,000
Basic (dollars per share)	$ 0.94	$ 0.96	$ 0.77	$ 0.15	$ 0.28	$ 0.44	$ 0.18	$ 1.02	$ 2.82	$ 1.92	$ 1.73
Diluted (dollars per share)	$ 0.92	$ 0.95	$ 0.77	$ 0.15	$ 0.28	$ 0.44	$ 0.18	$ 1.01	$ 2.79	$ 1.91	$ 1.71
Repurchase Program 2012 [Member]
Equity Class Of Treasury Stock [Line Items]
Number of Shares Authorized to be Repurchased												10,000,000
Remaining Number of Shares Authorized to be Repurchased	4,600,000								4,600,000
Combined Repurchase Programs [Member]
Equity Class Of Treasury Stock [Line Items]
Number of Shares Acquired During Period									3,100,000
Performance Shares [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount									100,000
Stock Options [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount									600,000	1,000,000	600,000

FAIR VALUE MEASUREMENT (DETAIL)

FAIR VALUE MEASUREMENT (DETAIL) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jun. 28, 2013	Dec. 31, 2011
Assets
Derivative assets		$ 14	$ 1
Liabilities
Derivative liabilities		6	8
Contingent consideration			5
Total liabilities			13
2014 Acquisition of Transaco [Member] | Other Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Change in fair value of contingent liability		2
Liabilities
Contingent consideration		3	5
Fair Value, Inputs, Level 1 [Member]
Assets
Derivative assets		0	0
Liabilities
Derivative liabilities		0	0
Contingent consideration			0
Total liabilities			0
Fair Value, Inputs, Level 2 [Member]
Assets
Derivative assets		14	1
Liabilities
Derivative liabilities		6	8
Contingent consideration			0
Total liabilities			8
Fair Value, Inputs, Level 3 [Member]
Assets
Derivative assets		0	0
Liabilities
Derivative liabilities		$ 0	0
Contingent consideration			5
Total liabilities			$ 5
Subsequent Event [Member] | 2014 Acquisition of Transaco [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Payment to settle contingent liability	$ 3
Senior Notes Due 2016 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Notes Payable, Fair Value Disclosure, Par Value		103.00%	109.00%
Percentage Bearing Fixed Interest Percentage Rate		6.50%	6.50%		6.50%
Senior Notes Due 2019 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Notes Payable, Fair Value Disclosure, Par Value		116.00%	119.00%
Percentage Bearing Fixed Interest Percentage Rate		9.00%	9.00%
Senior Notes Due 2022 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Notes Payable, Fair Value Disclosure, Par Value		99.00%	101.00%
Percentage Bearing Fixed Interest Percentage Rate		4.20%	4.20%	4.20%
Senior Notes Due 2024 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Notes Payable, Fair Value Disclosure, Par Value		100.00%	99.00%
Percentage Bearing Fixed Interest Percentage Rate		4.20%	4.20%
Senior Notes Due 2036 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Notes Payable, Fair Value Disclosure, Par Value		105.00%	124.00%
Percentage Bearing Fixed Interest Percentage Rate		7.00%	7.00%

INCOME TAXES (DETAIL)

INCOME TAXES (DETAIL) - USD ($)		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]
Earnings Before Taxes, Domestic											$ 214,000,000	$ 106,000,000	$ 196,000,000
Earnings Before Taxes, Foreign											239,000,000	126,000,000	77,000,000
EARNINGS BEFORE TAXES											453,000,000	232,000,000	273,000,000
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current Federal Tax Expense (Benefit)											2,000,000	(2,000,000)	(2,000,000)
Current State and Local Tax Expense (Benefit)											1,000,000	0	(2,000,000)
Current Foreign Tax Expense (Benefit)											53,000,000	22,000,000	30,000,000
Current Income Tax Expense (Benefit)											56,000,000	20,000,000	26,000,000
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred Federal Income Tax Expense (Benefit)											83,000,000	(6,000,000)	56,000,000
Deferred State and Local Income Tax Expense (Benefit)											10,000,000	8,000,000	2,000,000
Deferred Foreign Income Tax Expense (Benefit)											(29,000,000)	(17,000,000)	(16,000,000)
Deferred Income Tax Expense (Benefit)											64,000,000	(15,000,000)	42,000,000
Total income tax expense		$ 8,000,000	$ 55,000,000	$ 44,000,000	$ 13,000,000	$ (4,000,000)	$ 27,000,000	$ 21,000,000	$ (39,000,000)		$ 120,000,000	$ 5,000,000	$ 68,000,000
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
United States federal statutory rate											35.00%	35.00%	35.00%
State and local income taxes, net of federal tax benefit											$ 2,000,000	$ 1,000,000	$ 2,000,000
Foreign tax rate differential											2,000,000	(15,000,000)	(11,000,000)
U.S. tax expense/benefit on foreign earnings/loss											4,000,000	(5,000,000)	(2,000,000)
Valuation allowance											(16,000,000)	(1,000,000)	17,000,000
Loss on liquidation											0	0	(10,000,000)
Uncertain tax positions and settlements											0	(18,000,000)	(1,000,000)
Other, net											$ 0	$ 5,000,000	$ (5,000,000)
Effective tax rate											27.00%	2.00%	25.00%
Components of Deferred Tax Assets [Abstract]
Deferred Tax Assets, Other Employee Benefits		120,000,000				155,000,000					$ 120,000,000	$ 155,000,000
Deferred Tax Assets, Pension Plans		156,000,000				159,000,000					156,000,000	159,000,000
Deferred Tax Assets, Operating Loss Carryforwards		957,000,000				1,046,000,000					957,000,000	1,046,000,000
Deferred Tax Assets, State and Local		6,000,000				4,000,000					6,000,000	4,000,000
Deferred Tax Assets, Other		62,000,000				113,000,000					62,000,000	113,000,000
Deferred Tax Assets, Gross		1,301,000,000				1,477,000,000					1,301,000,000	1,477,000,000
Valuation Allowance, Amount		(135,000,000)				(227,000,000)					(135,000,000)	(227,000,000)
Deferred Tax Assets Total		1,166,000,000				1,250,000,000					1,166,000,000	1,250,000,000
Current Deferred Tax Assets		0				135,000,000					0	135,000,000
Components of Deferred Tax Liabilities [Abstract]
Deferred Tax Liabilities, Depreciation		315,000,000				327,000,000					315,000,000	327,000,000
Deferred Tax Liabilities, Amortization		367,000,000				366,000,000					367,000,000	366,000,000
Deferred Tax Liabilities Total		682,000,000				693,000,000					682,000,000	693,000,000
Deferred Tax Liability Not Recognized For Foreign Withholding and United States Federal Income Taxes on Undistributed Earnings of Foreign Subsidiaries		581,000,000									581,000,000
Undistributed Earnings of Foreign Subsidiaries		1,600,000,000									1,600,000,000
Deferred Tax Assets, Operating Loss and Tax Credit Carryforwards [Abstract]
U.S. federal loss carryforwards		670,000,000									670,000,000
U.S. state loss carryforwards (a)	[1]	77,000,000									77,000,000
Foreign loss and tax credit carryforwards		104,000,000									104,000,000
Foreign loss and tax credit carryforwards (a)	[1]	62,000,000									62,000,000
U.S. alternative minimum tax credit		28,000,000									28,000,000
Other U.S. federal and state tax credits		16,000,000									16,000,000
US State Deferred Tax Asset Related to Loss Carryforwards Set to Expire		14,000,000									14,000,000
Foreign Deferred Tax Asset Related to Loss Carryforwards Set to Expire		12,000,000									$ 12,000,000
Operating Loss Carryforwards Expiration Period											3 years
Federal Earnings Before Tax Needed											$ 2,200,000,000
State Earnings Before Tax Needed											2,500,000,000
Foreign Earnings Before Tax Needed											600,000,000
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits, Beginning Balance					$ 106,000,000				$ 155,000,000	$ 84,000,000	106,000,000	155,000,000	$ 161,000,000
Tax Positions Related to Current Year, Gross Additions											1,000,000	2,000,000	2,000,000
Tax Positions Related to Prior Years, Gross Additions											2,000,000	10,000,000	4,000,000
Tax Positions Related to Prior Years, Gross Reductions											(18,000,000)	(57,000,000)	(1,000,000)
Settlements											(7,000,000)	(1,000,000)	(3,000,000)
Lapses on Statutes of Limitations											0	(3,000,000)	(8,000,000)
Unrecognized Tax Benefits, Ending Balance		84,000,000				106,000,000					84,000,000	106,000,000	155,000,000
Income Tax Penalties and Interest [Abstract]
Income Tax Examination, Penalties and Interest Accrued		8,000,000				$ 8,000,000					8,000,000	8,000,000	6,000,000
Income Tax Examination, Penalties and Interest Expense											3,000,000	2,000,000	$ (3,000,000)
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority		61,000,000									61,000,000
Minimum [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits Estimated Range of Change Lower Bound		0									0
Maximum [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits Estimated Range of Change Lower Bound		3,000,000									3,000,000
Domestic Tax Authority [Member]
Components of Deferred Tax Assets [Abstract]
Deferred Tax Assets, Gross		391,000,000									391,000,000
Deferred Tax Assets, Operating Loss and Tax Credit Carryforwards [Abstract]
Operating Loss Carryforwards		2,000,000,000									2,000,000,000
State and Local Jurisdiction [Member]
Components of Deferred Tax Assets [Abstract]
Deferred Tax Assets, Gross		50,000,000									50,000,000
Deferred Tax Assets, Operating Loss and Tax Credit Carryforwards [Abstract]
Operating Loss Carryforwards		2,300,000,000									2,300,000,000
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Tax Positions Related to Current Year, Gross Additions											11,000,000	13,000,000
Foreign Tax Authority [Member]
Components of Deferred Tax Assets [Abstract]
Deferred Tax Assets, Gross		178,000,000									178,000,000
Deferred Tax Assets, Operating Loss and Tax Credit Carryforwards [Abstract]
Operating Loss Carryforwards		$ 600,000,000									600,000,000
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Tax Positions Related to Current Year, Gross Additions											$ 124,000,000	$ 214,000,000
Foreign Tax Authority [Member] | Minimum [Member] | Scenario, Forecast [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Reduction in Valuation Allowance										0
Foreign Tax Authority [Member] | Maximum [Member] | Scenario, Forecast [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Reduction in Valuation Allowance										$ 12,000,000
[1]	As of December 31, 2015, $14 million of U.S. state and $12 million of foreign deferred tax assets related to loss carryforwards are set to expire over the next three years.

QUARTERLY FINANCIAL INFORMATI76

QUARTERLY FINANCIAL INFORMATION (unaudited) (DETAIL) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quantifying Misstatement in Current Year Financial Statements, Amount		$ 14	$ 11	$ 4	$ 4	$ 4	$ 5	$ 3
NET SALES	$ 1,297	1,447	1,403	1,203	1,257	1,378	1,350	1,275	$ 5,350	$ 5,260	$ 5,295
COST OF SALES	1,001	1,107	1,095	994	1,014	1,127	1,102	1,041	4,197	4,284	4,329
Gross margin	296	340	308	209	243	251	248	234	1,153	976	966
Earnings before interest and taxes	138	196	156	58	104	107	73	108	548	392	385
Interest expense, net	20	28	26	26	28	28	31	27	100	114	112
Loss (gain) on extinguishment of debt	0	0	(5)	0	(46)	0	0	0	(5)	46	0
Less: Income tax expense	8	55	44	13	(4)	27	21	(39)	120	5	68
Net earnings attributable to Owens Corning	$ 109	$ 112	$ 91	$ 18	$ 33	$ 52	$ 21	$ 120	$ 330	$ 226	$ 204
Basic (dollars per share)	$ 0.94	$ 0.96	$ 0.77	$ 0.15	$ 0.28	$ 0.44	$ 0.18	$ 1.02	$ 2.82	$ 1.92	$ 1.73
Diluted (dollars per share)	0.92	0.95	0.77	0.15	$ 0.28	$ 0.44	$ 0.18	$ 1.01	$ 2.79	1.91	$ 1.71
Dividend (dollars per share)	$ 0.17	$ 0.17	$ 0.17	$ 0.17						$ 0.16
As Reported [Member]
NET SALES		$ 1,461	$ 1,414	$ 1,207	$ 1,261	$ 1,382	$ 1,355	$ 1,278
COST OF SALES		1,121	1,106	998	1,018	1,131	1,107	1,044
Revision [Member]
NET SALES		(14)	(11)	(4)	(4)	(4)	(5)	(3)
COST OF SALES		$ (14)	$ (11)	$ (4)	$ (4)	$ (4)	$ (5)	$ (3)

CONDENSED CONSOLIDATING FINAN77

CONDENSED CONSOLIDATING FINANCIAL STATEMENTS (NARRATIVE) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Property, plant and equipment, net	$ 2,956	$ 2,899
Investment in subsidiaries	0	0
Additional paid in capital	3,965	3,954
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Property, plant and equipment, net	463	471
Investment in subsidiaries	7,704	7,392
Additional paid in capital	3,965	3,954
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Property, plant and equipment, net	1,404	1,285
Investment in subsidiaries	2,503	2,590
Additional paid in capital	$ 6,260	6,371
MIsclassification [Member] | Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Property, plant and equipment, net		(112)
Investment in subsidiaries		112
MIsclassification [Member] | Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Property, plant and equipment, net		112
Additional paid in capital		$ 112

CONDENSED CONSOLIDATING FINAN78

CONDENSED CONSOLIDATING FINANCIAL STATEMENTS (EARNINGS) (DETAIL) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
NET SALES	$ 1,297,000,000	$ 1,447,000,000	$ 1,403,000,000	$ 1,203,000,000	$ 1,257,000,000	$ 1,378,000,000	$ 1,350,000,000	$ 1,275,000,000	$ 5,350,000,000	$ 5,260,000,000	$ 5,295,000,000
COST OF SALES	1,001,000,000	1,107,000,000	1,095,000,000	994,000,000	1,014,000,000	1,127,000,000	1,102,000,000	1,041,000,000	4,197,000,000	4,284,000,000	4,329,000,000
Gross margin	296,000,000	340,000,000	308,000,000	209,000,000	243,000,000	251,000,000	248,000,000	234,000,000	1,153,000,000	976,000,000	966,000,000
OPERATING EXPENSES
Marketing and administrative expenses									525,000,000	487,000,000	530,000,000
Science and technology expenses									73,000,000	76,000,000	77,000,000
Charges related to cost reduction actions									(6,000,000)	37,000,000	8,000,000
Other expenses (income), net									13,000,000	(16,000,000)	(34,000,000)
Total operating expenses									605,000,000	584,000,000	581,000,000
EARNINGS BEFORE INTEREST AND TAXES	138,000,000	196,000,000	156,000,000	58,000,000	104,000,000	107,000,000	73,000,000	108,000,000	548,000,000	392,000,000	385,000,000
Interest expense, net	20,000,000	28,000,000	26,000,000	26,000,000	28,000,000	28,000,000	31,000,000	27,000,000	100,000,000	114,000,000	112,000,000
Loss (gain) on extinguishment of debt	0	0	(5,000,000)	0	(46,000,000)	0	0	0	(5,000,000)	46,000,000	0
EARNINGS BEFORE TAXES									453,000,000	232,000,000	273,000,000
Income Tax Expense (Benefit)	8,000,000	55,000,000	44,000,000	13,000,000	(4,000,000)	27,000,000	21,000,000	(39,000,000)	120,000,000	5,000,000	68,000,000
EARNINGS BEFORE EQUITY IN NET EARNINGS OF SUBSIDIARIES AND AFFILIATES									333,000,000	227,000,000	205,000,000
Equity in net earnings of subsidiaries									0	0	0
Equity in net earnings of affiliates									1,000,000	1,000,000	0
NET EARNINGS									334,000,000	228,000,000	205,000,000
Less: Net earnings attributable to noncontrolling interests									4,000,000	2,000,000	1,000,000
NET EARNINGS ATTRIBUTABLE TO OWENS CORNING	$ 109,000,000	$ 112,000,000	$ 91,000,000	$ 18,000,000	$ 33,000,000	$ 52,000,000	$ 21,000,000	$ 120,000,000	330,000,000	226,000,000	204,000,000
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
NET SALES									0	0	0
COST OF SALES									1,000,000	(12,000,000)	(10,000,000)
Gross margin									(1,000,000)	12,000,000	10,000,000
OPERATING EXPENSES
Marketing and administrative expenses									126,000,000	112,000,000	123,000,000
Science and technology expenses									0	0	0
Charges related to cost reduction actions									0	1,000,000	0
Other expenses (income), net									(48,000,000)	(38,000,000)	(27,000,000)
Total operating expenses									78,000,000	75,000,000	96,000,000
EARNINGS BEFORE INTEREST AND TAXES									(79,000,000)	(63,000,000)	(86,000,000)
Interest expense, net									95,000,000	106,000,000	104,000,000
Loss (gain) on extinguishment of debt									(5,000,000)	46,000,000	0
EARNINGS BEFORE TAXES									(169,000,000)	(215,000,000)	(190,000,000)
Income Tax Expense (Benefit)									(71,000,000)	(81,000,000)	(72,000,000)
EARNINGS BEFORE EQUITY IN NET EARNINGS OF SUBSIDIARIES AND AFFILIATES									(98,000,000)	(134,000,000)	(118,000,000)
Equity in net earnings of subsidiaries									428,000,000	360,000,000	322,000,000
Equity in net earnings of affiliates									0	0	0
NET EARNINGS									330,000,000	226,000,000	204,000,000
Less: Net earnings attributable to noncontrolling interests									0	0	0
NET EARNINGS ATTRIBUTABLE TO OWENS CORNING									330,000,000	226,000,000	204,000,000
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
NET SALES									3,785,000,000	3,646,000,000	3,730,000,000
COST OF SALES									3,062,000,000	3,022,000,000	3,085,000,000
Gross margin									723,000,000	624,000,000	645,000,000
OPERATING EXPENSES
Marketing and administrative expenses									281,000,000	247,000,000	267,000,000
Science and technology expenses									61,000,000	58,000,000	58,000,000
Charges related to cost reduction actions									0	5,000,000	0
Other expenses (income), net									15,000,000	17,000,000	(39,000,000)
Total operating expenses									357,000,000	327,000,000	286,000,000
EARNINGS BEFORE INTEREST AND TAXES									366,000,000	297,000,000	359,000,000
Interest expense, net									3,000,000	3,000,000	2,000,000
Loss (gain) on extinguishment of debt									0	0	0
EARNINGS BEFORE TAXES									363,000,000	294,000,000	357,000,000
Income Tax Expense (Benefit)									159,000,000	85,000,000	121,000,000
EARNINGS BEFORE EQUITY IN NET EARNINGS OF SUBSIDIARIES AND AFFILIATES									204,000,000	209,000,000	236,000,000
Equity in net earnings of subsidiaries									224,000,000	151,000,000	86,000,000
Equity in net earnings of affiliates									0	0	0
NET EARNINGS									428,000,000	360,000,000	322,000,000
Less: Net earnings attributable to noncontrolling interests									0	0	0
NET EARNINGS ATTRIBUTABLE TO OWENS CORNING									428,000,000	360,000,000	322,000,000
Non Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
NET SALES									1,944,000,000	1,989,000,000	1,988,000,000
COST OF SALES									1,513,000,000	1,649,000,000	1,677,000,000
Gross margin									431,000,000	340,000,000	311,000,000
OPERATING EXPENSES
Marketing and administrative expenses									118,000,000	128,000,000	140,000,000
Science and technology expenses									12,000,000	18,000,000	19,000,000
Charges related to cost reduction actions									(6,000,000)	31,000,000	8,000,000
Other expenses (income), net									46,000,000	5,000,000	32,000,000
Total operating expenses									170,000,000	182,000,000	199,000,000
EARNINGS BEFORE INTEREST AND TAXES									261,000,000	158,000,000	112,000,000
Interest expense, net									2,000,000	5,000,000	6,000,000
Loss (gain) on extinguishment of debt									0	0	0
EARNINGS BEFORE TAXES									259,000,000	153,000,000	106,000,000
Income Tax Expense (Benefit)									32,000,000	1,000,000	19,000,000
EARNINGS BEFORE EQUITY IN NET EARNINGS OF SUBSIDIARIES AND AFFILIATES									227,000,000	152,000,000	87,000,000
Equity in net earnings of subsidiaries									0	0	0
Equity in net earnings of affiliates									1,000,000	1,000,000	0
NET EARNINGS									228,000,000	153,000,000	87,000,000
Less: Net earnings attributable to noncontrolling interests									4,000,000	2,000,000	1,000,000
NET EARNINGS ATTRIBUTABLE TO OWENS CORNING									224,000,000	151,000,000	86,000,000
Consolidation Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
NET SALES									(379,000,000)	(375,000,000)	(423,000,000)
COST OF SALES									(379,000,000)	(375,000,000)	(423,000,000)
Gross margin									0	0	0
OPERATING EXPENSES
Marketing and administrative expenses									0	0	0
Science and technology expenses									0	0	0
Charges related to cost reduction actions									0	0	0
Other expenses (income), net									0	0	0
Total operating expenses									0	0	0
EARNINGS BEFORE INTEREST AND TAXES									0	0	0
Interest expense, net									0	0	0
Loss (gain) on extinguishment of debt									0	0	0
EARNINGS BEFORE TAXES									0	0	0
Income Tax Expense (Benefit)									0	0	0
EARNINGS BEFORE EQUITY IN NET EARNINGS OF SUBSIDIARIES AND AFFILIATES									0	0	0
Equity in net earnings of subsidiaries									(652,000,000)	(511,000,000)	(408,000,000)
Equity in net earnings of affiliates									0	0	0
NET EARNINGS									(652,000,000)	(511,000,000)	(408,000,000)
Less: Net earnings attributable to noncontrolling interests									0	0	0
NET EARNINGS ATTRIBUTABLE TO OWENS CORNING									$ (652,000,000)	$ (511,000,000)	$ (408,000,000)

CONDENSED CONSOLIDATING FINAN79

CONDENSED CONSOLIDATING FINANCIAL STATEMENTS (COMPREHENSIVE EARNINGS) (DETAIL) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
NET EARNINGS	$ 334	$ 228	$ 205
Currency translation adjustment, including net investment hedge (net of tax of $(5), $0, and $0, for the periods ended December 31, 2015, 2014 and 2013, respectively)	(115)	(134)	(28)
Pension and Other Postretirement Adjustment (Net of Tax)	(6)	(113)	94
Deferred income (Loss) on Hedging Transactions (Net of Tax)	1	(6)	1
COMPREHENSIVE EARNINGS (LOSS)	214	(25)	272
Less: Comprehensive earnings attributable to noncontrolling interests	4	2	1
COMPREHENSIVE EARNINGS (LOSS) ATTRIBUTABLE TO OWENS CORNING	210	(27)	271
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
NET EARNINGS	330	226	204
Currency translation adjustment, including net investment hedge (net of tax of $(5), $0, and $0, for the periods ended December 31, 2015, 2014 and 2013, respectively)	(115)	(134)	(28)
Pension and Other Postretirement Adjustment (Net of Tax)	(6)	(113)	94
Deferred income (Loss) on Hedging Transactions (Net of Tax)	1	(6)	1
COMPREHENSIVE EARNINGS (LOSS)	210	(27)	271
Less: Comprehensive earnings attributable to noncontrolling interests	0	0	0
COMPREHENSIVE EARNINGS (LOSS) ATTRIBUTABLE TO OWENS CORNING	210	(27)	271
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
NET EARNINGS	428	360	322
Currency translation adjustment, including net investment hedge (net of tax of $(5), $0, and $0, for the periods ended December 31, 2015, 2014 and 2013, respectively)	0	0	0
Pension and Other Postretirement Adjustment (Net of Tax)	0	0	0
Deferred income (Loss) on Hedging Transactions (Net of Tax)	0	0	0
COMPREHENSIVE EARNINGS (LOSS)	428	360	322
Less: Comprehensive earnings attributable to noncontrolling interests	0	0	0
COMPREHENSIVE EARNINGS (LOSS) ATTRIBUTABLE TO OWENS CORNING	428	360	322
Non Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
NET EARNINGS	228	153	87
Currency translation adjustment, including net investment hedge (net of tax of $(5), $0, and $0, for the periods ended December 31, 2015, 2014 and 2013, respectively)	0	0	0
Pension and Other Postretirement Adjustment (Net of Tax)	0	0	0
Deferred income (Loss) on Hedging Transactions (Net of Tax)	0	0	0
COMPREHENSIVE EARNINGS (LOSS)	228	153	87
Less: Comprehensive earnings attributable to noncontrolling interests	4	2	1
COMPREHENSIVE EARNINGS (LOSS) ATTRIBUTABLE TO OWENS CORNING	224	151	86
Consolidation Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
NET EARNINGS	(652)	(511)	(408)
Currency translation adjustment, including net investment hedge (net of tax of $(5), $0, and $0, for the periods ended December 31, 2015, 2014 and 2013, respectively)	0	0	0
Pension and Other Postretirement Adjustment (Net of Tax)	0	0	0
Deferred income (Loss) on Hedging Transactions (Net of Tax)	0	0	0
COMPREHENSIVE EARNINGS (LOSS)	(652)	(511)	(408)
Less: Comprehensive earnings attributable to noncontrolling interests	0	0	0
COMPREHENSIVE EARNINGS (LOSS) ATTRIBUTABLE TO OWENS CORNING	$ (652)	$ (511)	$ (408)

CONDENSED CONSOLIDATING FINAN80

CONDENSED CONSOLIDATING FINANCIAL STATEMENTS (BALANCE SHEET) (DETAIL) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CURRENT ASSETS
Cash and cash equivalents		$ 96	$ 67	$ 57	$ 55
Receivables, net		709	674
Due from affiliates, current		0	0
Inventories		644	817
Assets held for sale – current		12	16
Other current assets		77	233
Total current assets		1,538	1,807
Investment in subsidiaries		0	0
Due from affiliates, noncurrent		0	0
Property, plant and equipment, net		2,956	2,899
Goodwill		1,167	1,168
Intangible assets, net		999	1,017
Deferred income taxes		492	444
Other non-current assets		228	207
TOTAL ASSETS		7,380	7,542
CURRENT LIABILITIES
Accounts payable and accrued liabilities		948	949
Due to affiliates, current		0	0
Short-term debt		6	31
Long-term debt – current portion		163	3
Total current liabilities		1,117	983
Long-term debt, net of current portion		1,702	1,978
Due to affiliates, noncurrent		0	0
Pension plan liability		397	447
Other employee benefits liability		240	252
Deferred income taxes		8	22
Other liabilities		137	130
OWENS CORNING STOCKHOLDERS' EQUITY
Preferred stock	[1]	0	0
Common stock	[2]	1	1
Additional paid in capital		3,965	3,954
Accumulated earnings		1,055	805
Accumulated other comprehensive deficit		(670)	(550)
Cost of common stock in treasury (c)	[3]	(612)	(518)
Total Owens Corning stockholders’ equity		3,739	3,692
Noncontrolling interests		40	38
Total equity		3,779	3,730	3,830	3,575
TOTAL LIABILITIES AND EQUITY		7,380	7,542
Parent Company [Member]
CURRENT ASSETS
Cash and cash equivalents		0	0	0	0
Receivables, net		0	0
Due from affiliates, current		0	0
Inventories		0	0
Assets held for sale – current		0	0
Other current assets		11	7
Total current assets		11	7
Investment in subsidiaries		7,704	7,392
Due from affiliates, noncurrent		0	0
Property, plant and equipment, net		463	471
Goodwill		0	0
Intangible assets, net		0	0
Deferred income taxes		0	35
Other non-current assets		25	17
TOTAL ASSETS		8,203	7,922
CURRENT LIABILITIES
Accounts payable and accrued liabilities		56	47
Due to affiliates, current		2,244	1,913
Short-term debt		0	0
Long-term debt – current portion		160	0
Total current liabilities		2,460	1,960
Long-term debt, net of current portion		1,668	1,838
Due to affiliates, noncurrent		0	0
Pension plan liability		286	310
Other employee benefits liability		0	0
Deferred income taxes		0	0
Other liabilities		50	122
OWENS CORNING STOCKHOLDERS' EQUITY
Preferred stock		0	0
Common stock		1	1
Additional paid in capital		3,965	3,954
Accumulated earnings		1,055	805
Accumulated other comprehensive deficit		(670)	(550)
Cost of common stock in treasury (c)		(612)	(518)
Total Owens Corning stockholders’ equity		3,739	3,692
Noncontrolling interests		0	0
Total equity		3,739	3,692
TOTAL LIABILITIES AND EQUITY		8,203	7,922
Guarantor Subsidiaries [Member]
CURRENT ASSETS
Cash and cash equivalents		48	1	3	3
Receivables, net		0	0
Due from affiliates, current		3,148	2,858
Inventories		389	527
Assets held for sale – current		0	0
Other current assets		21	132
Total current assets		3,606	3,518
Investment in subsidiaries		2,503	2,590
Due from affiliates, noncurrent		0	0
Property, plant and equipment, net		1,404	1,285
Goodwill		1,127	1,127
Intangible assets, net		970	989
Deferred income taxes		430	380
Other non-current assets		64	62
TOTAL ASSETS		10,104	9,951
CURRENT LIABILITIES
Accounts payable and accrued liabilities		682	667
Due to affiliates, current		0	0
Short-term debt		0	25
Long-term debt – current portion		2	1
Total current liabilities		684	693
Long-term debt, net of current portion		14	15
Due to affiliates, noncurrent		739	881
Pension plan liability		0	0
Other employee benefits liability		227	237
Deferred income taxes		0	0
Other liabilities		177	175
OWENS CORNING STOCKHOLDERS' EQUITY
Preferred stock		0	0
Common stock		0	0
Additional paid in capital		6,260	6,371
Accumulated earnings		2,003	1,579
Accumulated other comprehensive deficit		0	0
Cost of common stock in treasury (c)		0	0
Total Owens Corning stockholders’ equity		8,263	7,950
Noncontrolling interests		0	0
Total equity		8,263	7,950
TOTAL LIABILITIES AND EQUITY		10,104	9,951
Non Guarantor Subsidiaries [Member]
CURRENT ASSETS
Cash and cash equivalents		48	66	54	52
Receivables, net		709	674
Due from affiliates, current		0	0
Inventories		255	290
Assets held for sale – current		12	16
Other current assets		45	94
Total current assets		1,069	1,140
Investment in subsidiaries		559	558
Due from affiliates, noncurrent		739	881
Property, plant and equipment, net		1,089	1,143
Goodwill		40	41
Intangible assets, net		160	238
Deferred income taxes		62	29
Other non-current assets		139	128
TOTAL ASSETS		3,857	4,158
CURRENT LIABILITIES
Accounts payable and accrued liabilities		210	235
Due to affiliates, current		904	945
Short-term debt		6	6
Long-term debt – current portion		1	2
Total current liabilities		1,121	1,188
Long-term debt, net of current portion		20	125
Due to affiliates, noncurrent		0	0
Pension plan liability		111	137
Other employee benefits liability		13	15
Deferred income taxes		8	22
Other liabilities		41	43
OWENS CORNING STOCKHOLDERS' EQUITY
Preferred stock		0	0
Common stock		0	0
Additional paid in capital		1,618	1,927
Accumulated earnings		885	663
Accumulated other comprehensive deficit		0	0
Cost of common stock in treasury (c)		0	0
Total Owens Corning stockholders’ equity		2,503	2,590
Noncontrolling interests		40	38
Total equity		2,543	2,628
TOTAL LIABILITIES AND EQUITY		3,857	4,158
Consolidation Eliminations [Member]
CURRENT ASSETS
Cash and cash equivalents		0	0	$ 0	$ 0
Receivables, net		0	0
Due from affiliates, current		(3,148)	(2,858)
Inventories		0	0
Assets held for sale – current		0	0
Other current assets		0	0
Total current assets		(3,148)	(2,858)
Investment in subsidiaries		(10,766)	(10,540)
Due from affiliates, noncurrent		(739)	(881)
Property, plant and equipment, net		0	0
Goodwill		0	0
Intangible assets, net		(131)	(210)
Deferred income taxes		0	0
Other non-current assets		0	0
TOTAL ASSETS		(14,784)	(14,489)
CURRENT LIABILITIES
Accounts payable and accrued liabilities		0	0
Due to affiliates, current		(3,148)	(2,858)
Short-term debt		0	0
Long-term debt – current portion		0	0
Total current liabilities		(3,148)	(2,858)
Long-term debt, net of current portion		0	0
Due to affiliates, noncurrent		(739)	(881)
Pension plan liability		0	0
Other employee benefits liability		0	0
Deferred income taxes		0	0
Other liabilities		(131)	(210)
OWENS CORNING STOCKHOLDERS' EQUITY
Preferred stock		0	0
Common stock		0	0
Additional paid in capital		(7,878)	(8,298)
Accumulated earnings		(2,888)	(2,242)
Accumulated other comprehensive deficit		0	0
Cost of common stock in treasury (c)		0	0
Total Owens Corning stockholders’ equity		(10,766)	(10,540)
Noncontrolling interests		0	0
Total equity		(10,766)	(10,540)
TOTAL LIABILITIES AND EQUITY		$ (14,784)	$ (14,489)
[1]	10 shares authorized; none issued or outstanding at December 31, 2015 and December 31, 2014
[2]	400 shares authorized; 135.5 issued and 115.9 outstanding at December 31, 2015; 135.5 issued and 117.8 outstanding at December 31, 2014
[3]	19.6 shares at December 31, 2015 and 17.7 shares at December 31, 2014

CONDENSED CONSOLIDATING FINAN81

CONDENSED CONSOLIDATING FINANCIAL STATEMENTS (CASH FLOWS) (DETAIL) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Adjustments to reconcile net earnings to cash provided by operating activities:
Net cash flow provided by operating activities	$ 742	$ 452	$ 383
NET CASH FLOW USED FOR INVESTING ACTIVITIES
Cash paid for property, plant and equipment	(393)	(374)	(311)
Derivative settlements	4	5	0
Proceeds from Sale of Assets or Affiliates	20	65	0
Payments to Acquire Businesses, Net of Cash Acquired	0	(12)	(62)
Proceeds from Insurance Settlement, Investing Activities	0	0	58
Proceeds from Sale of Productive Assets	0	0	34
Purchases of alloy	(8)	(28)	(18)
Proceeds from the sale of alloy	8	47	16
Net cash flow used for investing activities	(369)	(297)	(283)
NET CASH FLOW USED FOR FINANCING ACTIVITIES
Proceeds from senior revolving credit and receivables securitization facilities	1,546	1,276	1,063
Payments on senior revolving credit and receivables securitization facilities	(1,652)	(1,344)	(1,103)
Proceeds from long-term debt	0	390	0
Payments on long-term debt	(8)	(402)	(2)
Dividends paid	(78)	(56)	0
Net increase (decrease) in short-term debt	(22)	30	(4)
Purchases of treasury stock	(138)	(44)	(63)
Other	19	8	13
Other intercompany loans	0	0	0
Net cash flow used for financing activities	(333)	(142)	(96)
Effect of exchange rate changes on cash	(11)	(3)	(2)
Net increase in cash and cash equivalents	29	10	2
Cash and cash equivalents at beginning of period	67	57	55
Cash and cash equivalents at end of period	96	67	57
Parent Company [Member]
Adjustments to reconcile net earnings to cash provided by operating activities:
Net cash flow provided by operating activities	(106)	(110)	(108)
NET CASH FLOW USED FOR INVESTING ACTIVITIES
Cash paid for property, plant and equipment	(21)	(13)	(10)
Derivative settlements	4	0
Proceeds from Sale of Assets or Affiliates	0	44
Payments to Acquire Businesses, Net of Cash Acquired	0	0	0
Proceeds from Insurance Settlement, Investing Activities			0
Proceeds from Sale of Productive Assets			0
Purchases of alloy	0	0	0
Proceeds from the sale of alloy	0	4	16
Net cash flow used for investing activities	(17)	35	6
NET CASH FLOW USED FOR FINANCING ACTIVITIES
Proceeds from senior revolving credit and receivables securitization facilities	1,236	1,226	940
Payments on senior revolving credit and receivables securitization facilities	(1,236)	(1,238)	(1,002)
Proceeds from long-term debt	0	390
Payments on long-term debt	(5)	(400)	0
Dividends paid	(78)	(56)
Net increase (decrease) in short-term debt	0	0	0
Purchases of treasury stock	(138)	(44)	(63)
Other	19	8	13
Other intercompany loans	325	189	214
Net cash flow used for financing activities	123	75	102
Effect of exchange rate changes on cash	0	0	0
Net increase in cash and cash equivalents	0	0	0
Cash and cash equivalents at beginning of period	0	0	0
Cash and cash equivalents at end of period	0	0	0
Guarantor Subsidiaries [Member]
Adjustments to reconcile net earnings to cash provided by operating activities:
Net cash flow provided by operating activities	465	474	273
NET CASH FLOW USED FOR INVESTING ACTIVITIES
Cash paid for property, plant and equipment	(271)	(223)	(126)
Derivative settlements	0	0
Proceeds from Sale of Assets or Affiliates	0	0
Payments to Acquire Businesses, Net of Cash Acquired	0	(5)	(51)
Proceeds from Insurance Settlement, Investing Activities			58
Proceeds from Sale of Productive Assets			0
Purchases of alloy	0	0	0
Proceeds from the sale of alloy	0	0	0
Net cash flow used for investing activities	(271)	(228)	(119)
NET CASH FLOW USED FOR FINANCING ACTIVITIES
Proceeds from senior revolving credit and receivables securitization facilities	0	0	0
Payments on senior revolving credit and receivables securitization facilities	0	0	0
Proceeds from long-term debt	0	0
Payments on long-term debt	(1)	0	0
Dividends paid	0	0
Net increase (decrease) in short-term debt	(25)	25	0
Purchases of treasury stock	0	0	0
Other	0	0	0
Other intercompany loans	(121)	(273)	(154)
Net cash flow used for financing activities	(147)	(248)	(154)
Effect of exchange rate changes on cash	0	0	0
Net increase in cash and cash equivalents	47	(2)	0
Cash and cash equivalents at beginning of period	1	3	3
Cash and cash equivalents at end of period	48	1	3
Non Guarantor Subsidiaries [Member]
Adjustments to reconcile net earnings to cash provided by operating activities:
Net cash flow provided by operating activities	383	88	218
NET CASH FLOW USED FOR INVESTING ACTIVITIES
Cash paid for property, plant and equipment	(101)	(138)	(175)
Derivative settlements	0	5
Proceeds from Sale of Assets or Affiliates	20	21
Payments to Acquire Businesses, Net of Cash Acquired	0	(7)	(11)
Proceeds from Insurance Settlement, Investing Activities			0
Proceeds from Sale of Productive Assets			34
Purchases of alloy	(8)	(28)	(18)
Proceeds from the sale of alloy	8	43	0
Net cash flow used for investing activities	(81)	(104)	(170)
NET CASH FLOW USED FOR FINANCING ACTIVITIES
Proceeds from senior revolving credit and receivables securitization facilities	310	50	123
Payments on senior revolving credit and receivables securitization facilities	(416)	(106)	(101)
Proceeds from long-term debt	0	0
Payments on long-term debt	(2)	(2)	(2)
Dividends paid	0	0
Net increase (decrease) in short-term debt	3	5	(4)
Purchases of treasury stock	0	0	0
Other	0	0	0
Other intercompany loans	(204)	84	(60)
Net cash flow used for financing activities	(309)	31	(44)
Effect of exchange rate changes on cash	(11)	(3)	(2)
Net increase in cash and cash equivalents	(18)	12	2
Cash and cash equivalents at beginning of period	66	54	52
Cash and cash equivalents at end of period	48	66	54
Consolidation Eliminations [Member]
Adjustments to reconcile net earnings to cash provided by operating activities:
Net cash flow provided by operating activities	0	0	0
NET CASH FLOW USED FOR INVESTING ACTIVITIES
Cash paid for property, plant and equipment	0	0	0
Derivative settlements	0	0
Proceeds from Sale of Assets or Affiliates	0	0
Payments to Acquire Businesses, Net of Cash Acquired	0	0	0
Proceeds from Insurance Settlement, Investing Activities			0
Proceeds from Sale of Productive Assets			0
Purchases of alloy	0	0	0
Proceeds from the sale of alloy	0	0	0
Net cash flow used for investing activities	0	0	0
NET CASH FLOW USED FOR FINANCING ACTIVITIES
Proceeds from senior revolving credit and receivables securitization facilities	0	0	0
Payments on senior revolving credit and receivables securitization facilities	0	0	0
Proceeds from long-term debt	0	0
Payments on long-term debt	0	0	0
Dividends paid	0	0
Net increase (decrease) in short-term debt	0	0	0
Purchases of treasury stock	0	0	0
Other	0	0	0
Other intercompany loans	0	0	0
Net cash flow used for financing activities	0	0	0
Effect of exchange rate changes on cash	0	0	0
Net increase in cash and cash equivalents	0	0	0
Cash and cash equivalents at beginning of period	0	0	0
Cash and cash equivalents at end of period	$ 0	0	$ 0
Misclassification of Interest Payments on Parent Loans [Member] | Guarantor Subsidiaries [Member]
NET CASH FLOW USED FOR FINANCING ACTIVITIES
Net Cash Provided by (Used in) Operating and Financing Activities		$ 242

SCHEDULE II - VALUATION AND Q82

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES (DETAILS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014		Dec. 31, 2013
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 10	$ 14		$ 17
Charged to Costs and Expenses	0	2		3
Charged to Other Accounts	0	0		0
Deductions	(2)	(6)	[1]	(6)	[1]
Acquisitions and Divestitures	0	0		0
Balance at End of Period	8	10		14
Tax Valuation Allowance [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	227	270		228
Charged to Costs and Expenses	(73)	(15)		46
Charged to Other Accounts	(18)	(17)		0
Deductions	(1)	(11)		(4)
Acquisitions and Divestitures		0		0
Balance at End of Period	$ 135	$ 227		$ 270
[1]	Uncollectible accounts written off, net of recoveries.

SUBSEQUENT EVENTS (Details)

SUBSEQUENT EVENTS (Details) $ in Millions	5 Months Ended
	Jun. 30, 2016USD ($)
European Glass Non-wovens and Fabrics Business [Member] | Scenario, Forecast [Member]
Subsequent Event [Line Items]
Consideration to be paid as part of business acquisition	$ 80