ACQUISITIONS	12 Months Ended
ACQUISITIONS	Dec. 31, 2022
Business Combination and Asset Acquisition [Abstract]
ACQUISITIONS	ACQUISITIONSOn September 1, 2022, the Company acquired the remaining 50% interest in Fiberteq, LLC (“Fiberteq”), the joint venture between Owens Corning and IKO Industries, Ltd, which produces high-quality wet-formed fiberglass mat for roofing applications for $140 million, net of cash acquired. The acquisition advances the Composites strategy to focus on high-value material solutions and expands Owens Corning's capacity to produce non-woven mat. The Company's 50% interest in Fiberteq was accounted for as an equity-method investment and had a carrying value of $17 million at the acquisition date. The Company used the discounted cash flow method to remeasure the previously held equity method investment to its fair value of $147 million, resulting in the recognition of a gain of $130 million, which is recorded in Gain on equity method investment on the Consolidated Statements of Earnings (Loss). The operating results and a preliminary purchase price allocation for Fiberteq have been included in the Composites segment within the Consolidated Financial Statements since the date of the acquisition. The Company is continuing to obtain information to complete its valuation of certain assets and liabilities. During the year ended December 31, 2022, the Company recorded immaterial measurement period adjustments to the purchase price allocation. The preliminary purchase price allocation included $58 million in intangible assets, which primarily consists of customer relationships with an estimated weighted average life of 3 years, a $62 million unfavorable contract liability and $243 million in goodwill, of which 50% of the goodwill is tax deductible. The factors contributing to the recognition of the amount of goodwill are based on several strategic and synergistic benefits that are expected to be realized from the acquisition. The pro-forma effect of this acquisition on revenues and earnings was not material. On August 1, 2022, the Company acquired Natural Polymers, LLC (“Natural Polymers”), an innovative manufacturer of spray polyurethane foam insulation for building and construction applications for approximately $111 million, net of cash acquired. The acquisition advances the Owens Corning strategy to strengthen the Company's core building and construction products and expand its addressable markets into higher-growth segments. The operating results and a preliminary purchase price allocation for Natural Polymers have been included in the Insulation segment within the Consolidated Financial Statements since the date of the acquisition. The Company is continuing to obtain information to complete its valuation of certain assets and liabilities. During the year ended December 31, 2022, the Company recorded immaterial measurement period adjustments to the purchase price allocation. The preliminary purchase price allocation included $44 million in intangible assets and $62 million in goodwill, of which all is tax deductible. The intangible assets consist of definite-lived trademarks of $5 million with an estimated weighted average life of 10 years, technology of $12 million with an estimated weighted average life of 6 years and customer relationships of $27 million with an estimated weighted average life of 17 years. The factors contributing to the recognition of the amount of goodwill are based on several strategic and synergistic benefits that are expected to be realized from the acquisition. The pro-forma effect of this acquisition on revenues and earnings was not material. On June 1, 2022, the Company acquired all of the outstanding assets of WearDeck®, a premium producer of composite weather-resistant decking for commercial and residential applications, for approximately $133 million, net of cash acquired. The acquisition advances the Composites business growth strategy to focus on high-value material solutions within the building and construction industry. The operating results and a preliminary purchase price allocation for WearDeck® have been included in the Composites segment within the Consolidated Financial Statements since the date of the acquisition. The Company is continuing to obtain information to complete its valuation of certain assets and liabilities. During the year ended December 31, 2022, the Company recorded immaterial measurement period adjustments to the purchase price allocation. The preliminary purchase price allocation included $38 million in intangible assets and $68 million in goodwill, of which $61 million is tax deductible. The intangible assets consist of definite-lived trademarks of $7 million with an estimated weighted average life of 10 years, technology of $10 million with an estimated weighted average life of 11 years and customer relationships of $21 million with an estimated weighted average life of 15 years. The factors contributing to the recognition of the amount of goodwill are based on several strategic and synergistic benefits that are expected to be realized from the acquisition. The pro-forma effect of this acquisition on revenues and earnings was not material. On May 23, 2022, Owens Corning and Pultron Composites (“Pultron”) formed a joint venture (the “JV”) to manufacture and sell fiberglass rebar. The Company contributed approximately $47 million to acquire a 65.5% controlling interest and has established a redeemable noncontrolling interest of $25 million related to Pultron, the minority holder. The JV expands Owens Corning’s capability to produce high-value material solutions by combining the Company’s glass-fiber material technology, channel access and extensive industry experience with Pultron’s manufacturing expertise and process efficiency. The fully consolidated operating results and a preliminary purchase price allocation for the JV have been included in the Company’s Composites segment within the Consolidated Financial Statements since the date of the formation of the JV. Subsequent to the JV formation, the JV acquired assets and technology from Pultron for approximately $65 million. The Company is continuing to obtain information to complete its valuation of certain assets and liabilities. The preliminary purchase price allocation included $15 million in intangible assets, consisting of technology, with an estimated weighted average life of 15 years and $42 million in goodwill, of which $37 million is tax deductible. The factors contributing to the recognition of the amount of goodwill are based on several strategic and synergistic benefits that are expected to be realized from the acquisition. The pro-forma effect of this acquisition on revenues and earnings was not material. On July 13, 2021, the Company acquired vliepa GmbH (“vliepa”), which specializes in the coating, printing, and finishing of non-wovens, paper, and film for the building materials industry in Europe, for $42 million, net of cash acquired. The acquisition broadens the Company’s global non-wovens portfolio to better serve European customers and accelerate growth of building and construction market applications in the region. The operating results for vliepa have been included in the Company’s Composites segment within the Consolidated Financial Statements since the date of the acquisition. The acquisition resulted in the recognition of $13 million in intangible assets, primarily consisting of customer relationships with an estimated weighted average life of 12 years, and $16 million in goodwill. The pro-forma effect of this acquisition on revenues and earnings was not material.