General (Policies)	3 Months Ended
Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Reportable Segments	Reportable Segments - Through the end of 2023 we operated with two reportable segments identified for financial reporting purposes: Advanced Technical Materials ("ATM") and Fiber-Based Solutions ("FBS"). As part of an organizational realignment effective during the first quarter of 2024, we reorganized into two new reportable segments: (1) Filtration & Advanced Materials ("FAM"), focused primarily on filtration media and components, advanced films, coating and converting solutions, and extruded mesh products, and (2) Sustainable & Adhesive Solutions ("SAS") focused primarily on tapes, labels, liners, specialty paper, packaging and healthcare solutions. The change in reportable segments reflects the realignment of management and the related internal review of our operating segments. The prior period presentation has been revised to align with our current segment reporting structure.
Basis of Presentation	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 months ended March 31, 2024 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, 2023, as filed with the SEC on February 29, 2024.
Reclassifications	Reclassifications Certain prior year amounts on the unaudited Condensed Consolidated Statements of Income (Loss), unaudited Condensed Consolidated Balance Sheets, unaudited Condensed Consolidated Statements of Cash Flows, and unaudited Notes to Condensed Consolidated Financial Statements have been reclassified to conform to the current year presentation as continuing and discontinued operations and for comparative purposes. Certain prior year amounts in the unaudited Notes to Condensed Consolidated Financial Statements have been reclassified to conform to the current year segments for comparative purposes.
Use of Estimates	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 Issued Accounting Standards and Pronouncements	Recently Issued Accounting Standards and Pronouncements In March 2024, the Securities and Exchange Commission ("SEC") adopted final rules under SEC Release No. 33-11275, The Enhancement and Standardization of Climate-Related Disclosures for Investors. The rules require disclosure of, among other things: climate-related risks that are reasonably likely to have a material impact on its business, results of operations, or financial condition, and material direct greenhouse gas ("GHG") emissions from operations owned or controlled (Scope 1) and /or indirect GHG emissions from purchased energy consumed in operations (Scope 2). Additionally, the rules require disclosure of certain climate-related metrics subject to certain materiality thresholds, including the effects of severe weather events and other natural conditions. Disclosure requirements will begin phasing in prospectively for our fiscal year ended December 31, 2025 Form 10-K. Subsequent to issuance, the rules became the subject of litigation, and the SEC has issued a stay to allow the legal process to proceed. We are currently evaluating the impact of the rules on our disclosures and will monitor the litigation progress for possible impacts on the disclosure requirements under the rules. In December 2023, the FASB issued ASU 2023-09, "Income Taxes (Topic 740): Improvements to Income Tax Disclosures." The amendment enhances income tax disclosure requirements, particularly regarding the effective tax rate reconciliation and income taxes paid. The amendments in this ASU are effective for fiscal years beginning after December 15, 2024. The Company is in the process of evaluating the effect that the adoption of these standards will have on its consolidated financial statements. In November 2023, the FASB issued ASU 2023-07, "Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures." The amendment enhances reportable segment disclosure requirements, primarily regarding significant segment expenses that are regularly provided to the chief operating decision maker and included within each reported measure of segment profit or loss, an amount and description of other segment items and expanded interim disclosures that align with those required annually, among other provisions. The amendments in this ASU are effective on a retrospective basis for annual periods beginning January 1, 2024, and interim periods within those annual periods beginning January 1, 2025, with early adoption permitted. The Company is in the process of evaluating the effect that the adoption of these standards will have on its consolidated financial statements.

General (Policies)

3 Months Ended

Mar. 31, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Reportable Segments - Through the end of 2023 we operated with two reportable segments identified for financial reporting purposes: Advanced Technical Materials ("ATM") and Fiber-Based Solutions ("FBS").

As part of an organizational realignment effective during the first quarter of 2024, we reorganized into two new reportable segments: (1) Filtration & Advanced Materials ("FAM"), focused primarily on filtration media and components, advanced films, coating and converting solutions, and extruded mesh products, and (2) Sustainable & Adhesive Solutions ("SAS") focused primarily on tapes, labels, liners, specialty paper, packaging and healthcare solutions. The change in reportable segments reflects the realignment of management and the related internal review of our operating segments. The prior period presentation has been revised to align with our current segment reporting structure.

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 months ended March 31, 2024 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, 2023, as filed with the SEC on February 29, 2024.

Reclassifications

Certain prior year amounts on the unaudited Condensed Consolidated Statements of Income (Loss), unaudited Condensed Consolidated Balance Sheets, unaudited Condensed Consolidated Statements of Cash Flows, and unaudited Notes to Condensed Consolidated Financial Statements have been reclassified to conform to the current year presentation as continuing and discontinued operations and for comparative purposes.

Certain prior year amounts in the unaudited Notes to Condensed Consolidated Financial Statements have been reclassified to conform to the current year segments 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 Issued Accounting Standards and Pronouncements

In March 2024, the Securities and Exchange Commission ("SEC") adopted final rules under SEC Release No. 33-11275, The Enhancement and Standardization of Climate-Related Disclosures for Investors. The rules require disclosure of, among other things: climate-related risks that are reasonably likely to have a material impact on its business, results of operations, or financial condition, and material direct greenhouse gas ("GHG") emissions from operations owned or controlled (Scope 1) and /or indirect GHG emissions from purchased energy consumed in operations (Scope 2). Additionally, the rules require disclosure of certain climate-related metrics subject to certain materiality thresholds, including the effects of severe weather events and other natural conditions. Disclosure requirements will begin phasing in prospectively for our fiscal year ended December 31, 2025 Form 10-K. Subsequent to issuance, the rules became the subject of litigation, and the SEC has issued a stay to allow the legal process to proceed. We are currently evaluating the impact of the rules on our disclosures and will monitor the litigation progress for possible impacts on the disclosure requirements under the rules.

In December 2023, the FASB issued ASU 2023-09, "Income Taxes (Topic 740): Improvements to Income Tax Disclosures." The amendment enhances income tax disclosure requirements, particularly regarding the effective tax rate reconciliation and income taxes paid. The amendments in this ASU are effective for fiscal years beginning after December 15, 2024. The Company is in the process of evaluating the effect that the adoption of these standards will have on its consolidated financial statements.

In November 2023, the FASB issued ASU 2023-07, "Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures." The amendment enhances reportable segment disclosure requirements, primarily regarding significant segment expenses that are regularly provided to the chief operating decision maker and included within each reported measure of segment profit or loss, an amount and description of other segment items and expanded interim disclosures that align with those required annually, among other provisions. The amendments in this ASU are effective on a retrospective basis for annual periods beginning January 1, 2024, and interim periods within those annual periods beginning January 1, 2025, with early adoption permitted. The Company is in the process of evaluating the effect that the adoption of these standards will have on its consolidated financial statements.