General	12 Months Ended
General	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
General	General Nature of Business Mativ Holdings, Inc. is a global leader in manufacturing specialty materials, making material impacts on the world every day through a wide range of critical components and engineered solutions that solve our customers’ most complex challenges. Mativ manufactures globally through our family of business-to-business and consumer product brands. Mativ targets premium applications across diversified and growing end-markets, from filtration to healthcare to sustainable packaging and more. Our broad portfolio of technologies combines polymers, fibers, and resins to optimize the performance of our customers’ products across multiple stages of the value chain. On July 6, 2022, Schweitzer-Mauduit International, Inc. ("SWM") completed 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"). 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 21. Segment Information for additional information on our segments. 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 “EP Divestiture”). 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 EP Divestiture on October 4, 2023. 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 consolidated financial statements and the notes thereto, unless otherwise indicated, are on a continuing operations basis. On November 30, 2023 the Company completed the sale of EP business. With the sale of the EP business, Mativ ceased participating in the tobacco-related products market. Upon closing of the transaction, the Company recorded a gain on sale of $176.3 million ($170.0 million, net of income taxes) and released certain material deferred tax valuation allowances. The gain and cash proceeds are subject to customary working capital adjustments during a specified period following the sale close date. Refer to Note 9. Discontinued Operations for more information on the discontinued operations and transaction. Basis of Presentation The accompanying consolidated financial statements and the notes thereto have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP"). The preparation of financial statements in conformity with GAAP requires the Company to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the reporting periods. The Company believes the estimates and assumptions used in the preparation of these consolidated financial statements are reasonable, based upon currently available facts and known circumstances. Actual results may differ from those estimates and assumptions as a result of a number of factors, including those discussed elsewhere in this report and in its other public filings from time to time. Reclassifications Certain prior year amounts on the Consolidated Statements of Cash Flows have been reclassified to conform to the current year presentation 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. Certain prior year amounts in the reconciliation of income taxes computed at the U.S. Federal statutory income tax rate to the expense for income taxes have been reclassified to conform to the current year presentation for comparative purposes. Certain prior year amounts in the Net deferred income tax assets (liabilities) have been reclassified to conform to the current year presentation for comparative purposes. Certain current and prior year amounts on the Consolidated Statements of Income (Loss), Consolidated Balance Sheets, Consolidated Statements of Cash Flows, and Notes to Consolidated Financial Statements have been reclassified to conform to the current year presentation as continuing and discontinued operations and for comparative purposes. Principles of Consolidation The consolidated financial statements include the accounts of the Company and wholly-owned, majority-owned and controlled subsidiaries. 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 consolidated financial statements and the notes thereto, unless otherwise indicated, are on a continuing operations basis. Refer to Note 9. Discontinued Operations for more information on the discontinued operation and transaction. The financial statements and information set forth herein is as of and for the year ended December 31, 2023 and represent the merged company operations of SWM and Neenah and their respective subsidiaries on a consolidated basis effective as of July 6, 2022 as a result of the Merger. Because SWM was deemed the accounting acquirer under GAAP, the historical financial statements of SWM are presented as the historical financial statements of the consolidated company prior to the Merger. Accordingly, references to "Mativ," "the Company," "we," or "our" means SWM and its subsidiaries when referring to periods prior to the Merger, and means Mativ Holdings, Inc. when referring to the periods after the Merger. 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 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.