General	9 Months Ended
General	Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
General	General Nature of Business On August 1, 2023, the Company entered into a final, binding and irrevocable offer letter (the “Offer Letter”) with Evergreen Hill Enterprise Pte. Ltd., an affiliate of PT Bukit Muria Jaya (“Evergreen Hill Enterprise”) pursuant to which Evergreen Hill Enterprise made a binding offer (the “Offer”) to acquire the Company’s Engineered Papers business ("EP business") for $620.0 million in cash, subject to customary closing date adjustments (the “Engineered Papers Transaction”). Pursuant to the terms of the Offer Letter, following the conclusion of the required employee consultation process with its French works councils (the "French Consultation Process"), the Company accepted Evergreen Hill Enterprise's Offer and countersigned the Purchase Agreement, dated as of August 1, 2023 (the "Purchase Agreement"), with respect to the Engineered Papers Transaction on October 4, 2023. Completion of the Engineered Papers Transaction remains subject to the satisfaction or waiver of customary closing conditions, including regulatory approvals. The Engineered Papers Transaction is expected to close in the fourth quarter of 2023. Upon closing of the transaction, the Company expects to record a gain on sale and the release of certain material deferred tax valuation allowances. Effective with the Offer, the EP business is presented as a discontinued operation for all periods presented. Current and non-current assets and liabilities of the EP business are classified as held for sale, and certain prior period amounts have been retrospectively revised to reflect these changes. The unaudited condensed consolidated financial statements and the notes thereto, unless otherwise indicated, are on a continuing operations basis. See Note 16. Discontinued Operations for more information on the discontinued operation and transaction. On July 6, 2022, Schweitzer-Mauduit International, Inc. ("SWM") consummated its previously announced merger transaction involving Neenah, Inc. ("Neenah"). A wholly-owned subsidiary of SWM merged with and into Neenah (the "Merger"), with Neenah surviving the Merger as a direct and wholly-owned subsidiary of SWM. Effective as of the closing date of the Merger, SWM changed its name to Mativ Holdings, Inc. ("Mativ," "we," "our," or the "Company"). Mativ is a global leader in specialty materials headquartered in Alpharetta, Georgia, United States of America. The Company offers a wide range of critical components and engineered solutions to solve customers' most complex challenges, targeting premium applications across diversified and growing end markets. Combined with global manufacturing, supply chain, innovation, and material science capabilities, our broad portfolio of technologies combines polymers, fibers, and resins to optimize the performance of customers' products across multiple stages of the value chain. Effective with the Merger, the Company changed the name of its two reportable segments to: Advanced Technical Materials ("ATM") and Fiber-Based Solutions ("FBS"). There was no change to the historical reportable segments or historical results for the segments. Refer to Note 15. Segment Information for additional information on our segments. We conduct business in over 100 countries and operate 40 production locations worldwide, with offices and facilities in the United States, United Kingdom, China, Germany, France, Belgium, Poland, India, Brazil, Canada, Spain, Italy, Mexico, Netherlands, Malaysia, and Luxembourg. Basis of Presentation The accompanying unaudited condensed consolidated financial statements and the notes thereto have been prepared in accordance with the instructions on Form 10-Q and Rule 10-01 of Regulation S-X of the Securities and Exchange Commission ("SEC") and do not include all the information and disclosures required by accounting principles generally accepted in the United States of America ("GAAP"). However, such information reflects all adjustments (consisting of normal recurring adjustments) which are, in the opinion of management, necessary for a fair statement of results for the interim periods. The results of operations for the three and nine months ended September 30, 2023 are not necessarily indicative of the results to be expected for the full year. The unaudited condensed consolidated financial statements and these notes thereto included herein should be read in conjunction with the audited consolidated financial statements and the related notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, as filed with the SEC on March 1, 2023. Reclassifications Certain current and prior year amounts on the unaudited Condensed Consolidated Statements of Loss, unaudited Condensed Consolidated Balance Sheets, unaudited Condensed Consolidated Statements of Cash Flows, and Notes to unaudited Condensed Consolidated Financial Statements have been reclassified to conform to the current year presentation as continuing and discontinued operations and for comparative purposes. Prior year's classification of certain end markets in the legacy SWM Advanced Materials & Structures segment have been reclassified to conform to the current year presentation of ATM's end markets for comparative purposes. Use of Estimates The preparation of financial statements in conformity with GAAP requires estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the revenues and expenses during the reporting period. Actual results could differ significantly from these estimates. The significant estimates underlying our unaudited condensed consolidated financial statements include, but are not limited to, inventory valuation, goodwill valuation, useful lives of tangible and intangible assets, business acquisitions, equity-based compensation, derivatives, receivables valuation, pension, postretirement and other benefits, taxes and contingencies. Recently Adopted Accounting Standards In March 2020, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2020-04, "Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting." The new standard provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform and the anticipated discontinuance of the London Interbank Offered Rate ("LIBOR") if certain criteria are met. The amendments in this ASU are effective for all entities as of March 12, 2020 through December 31, 2022. In December 2022, FASB issued ASU 2022-06, "Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848", which extended the final sunset date from December 31, 2022 to December 31, 2024. The provisions of ASU 2020-04 and ASU 2022-06 were adopted effective April 1, 2022 and December 21, 2022, respectively, and did not have a material impact on the unaudited condensed consolidated financial statements.