Background	9 Months Ended
Sep. 30, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Background	Background Description of Business Ingevity Corporation ("Ingevity," "the company," "we," "us," or "our") provides products and technologies that purify, protect, and enhance the world around us. Through a diverse team of talented and experienced people, we develop, manufacture, and bring to market solutions that are largely renewably sourced and help customers solve complex problems while making the world more sustainable. Our products are used in a variety of demanding applications, including automotive gasoline vapor emissions control systems, food, water and chemical filtration, asphalt paving, agrochemical dispersants, bioplastics, coatings, and elastomers. We operate in three reportable segments: Performance Materials, Pavement Technologies, and Advanced Polymer Technologies (“APT”). Reportable Segment Renaming During 2026, dispositions within our former Performance Chemicals reportable segment resulted in a change to the segment's name. Historically, our Performance Chemicals reportable segment consisted of the pavement technologies, industrial specialties, and road markings product lines. Following the sale of the industrial specialties product line on January 1, 2026, and the sale of the road markings product line on April 15, 2026, the pavement technologies product line became the sole remaining product line within the former Performance Chemicals segment; refer to Note 16 for additional information regarding these dispositions. Accordingly, during the second quarter of 2026, we renamed the Performance Chemicals reportable segment to Pavement Technologies to better reflect the segment's operations. The segment rename did not affect our reportable segment structure, and segment information has been updated to reflect the new segment name, where applicable. Industrial Specialties Divestiture On September 3, 2025, Ingevity entered into an Asset Purchase Agreement (the "Purchase Agreement") with Mainstream Pine Products, LLC, a Delaware limited liability company ("Purchaser"), pursuant to which Purchaser agreed to purchase substantially all of the assets and assume and acquire certain of the rights and liabilities of Ingevity or its applicable affiliates that relate to or are used in connection with (a) Ingevity's industrial specialties product line (other than Ingevity's lignin dispersant and alternative fatty acid based products, pavement technologies product line and other businesses and products more fully described in the Purchase Agreement) and (b) Ingevity's North Charleston, South Carolina crude tall oil refinery (the "CTO Refinery") and Ingevity's and its affiliates' operations thereof (collectively, the "Divestiture"). We determined that, upon execution of the Purchase Agreement, the industrial specialties product line and CTO Refinery included within the Divestiture met the criteria to be classified as held for sale and that the sale represents a strategic shift that will have a major effect on Ingevity's operations and results. As such, the results of operations of the Divestiture have been reclassified and presented as discontinued operations for all periods presented. The Divestiture was completed on January 1, 2026. Unless otherwise indicated, the information in the notes to the Condensed Consolidated Financial Statements refers only to our continuing operations and does not include discussion of balances or activity of the Divestiture. Refer to Note 16 for more information. Basis of Consolidation and Presentation These unaudited Condensed Consolidated Financial Statements reflect the consolidated operations of the company and have been prepared in accordance with United States Securities and Exchange Commission ("SEC") interim reporting requirements. Accordingly, the accompanying Condensed Consolidated Financial Statements do not include all disclosures required by accounting principles generally accepted in the United States of America ("GAAP") for full financial statements and should be read in conjunction with the Annual Consolidated Financial Statements for the years ended December 31, 2025, 2024 and 2023, collectively referred to as the "Annual Consolidated Financial Statements," included in our Annual Report on Form 10-K for the year ended December 31, 2025 (the "2025 Annual Report"). In the opinion of management, the Condensed Consolidated Financial Statements reflect all adjustments, including normal recurring adjustments necessary to fairly present the financial position, results of operations, and cash flows for the interim periods presented and contain adequate disclosures to make the information presented not misleading. The consolidated results of operations for interim periods are not necessarily indicative of the results expected for the full year. The preparation of the Condensed Consolidated Financial Statements requires management to make estimates and assumptions with respect to the reported amounts of assets, liabilities, revenue, and expenses and the disclosure of contingent assets and liabilities. Actual results could differ from these estimates. Certain reclassifications have been made in the company's financial statements for prior periods to conform to the current-year presentation.

Ingevity Corporation ("Ingevity," "the company," "we," "us," or "our") provides products and technologies that purify, protect, and enhance the world around us. Through a diverse team of talented and experienced people, we develop, manufacture, and bring to market solutions that are largely renewably sourced and help customers solve complex problems while making the world more sustainable. Our products are used in a variety of demanding applications, including automotive gasoline vapor emissions control systems, food, water and chemical filtration, asphalt paving, agrochemical dispersants, bioplastics, coatings, and elastomers. We operate in three reportable segments: Performance Materials, Pavement Technologies, and Advanced Polymer Technologies (“APT”).

During 2026, dispositions within our former Performance Chemicals reportable segment resulted in a change to the segment's name. Historically, our Performance Chemicals reportable segment consisted of the pavement technologies, industrial specialties, and road markings product lines. Following the sale of the industrial specialties product line on January 1, 2026, and the sale of the road markings product line on April 15, 2026, the pavement technologies product line became the sole remaining product line within the former Performance Chemicals segment; refer to Note 16 for additional information regarding these dispositions. Accordingly, during the second quarter of 2026, we renamed the Performance Chemicals reportable segment to Pavement Technologies to better reflect the segment's operations. The segment rename did not affect our reportable segment structure, and segment information has been updated to reflect the new segment name, where applicable.

On September 3, 2025, Ingevity entered into an Asset Purchase Agreement (the "Purchase Agreement") with Mainstream Pine Products, LLC, a Delaware limited liability company ("Purchaser"), pursuant to which Purchaser agreed to purchase substantially all of the assets and assume and acquire certain of the rights and liabilities of Ingevity or its applicable affiliates that relate to or are used in connection with (a) Ingevity's industrial specialties product line (other than Ingevity's lignin dispersant and alternative fatty acid based products, pavement technologies product line and other businesses and products more fully described in the Purchase Agreement) and (b) Ingevity's North Charleston, South Carolina crude tall oil refinery (the "CTO Refinery") and Ingevity's and its affiliates' operations thereof (collectively, the "Divestiture"). We determined that, upon execution of the Purchase Agreement, the industrial specialties product line and CTO Refinery included within the Divestiture met the criteria to be classified as held for sale and that the sale represents a strategic shift that will have a major effect on Ingevity's operations and results. As such, the results of operations of the Divestiture have been reclassified and presented as discontinued operations for all periods presented. The Divestiture was completed on January 1, 2026.

These unaudited Condensed Consolidated Financial Statements reflect the consolidated operations of the company and have been prepared in accordance with United States Securities and Exchange Commission ("SEC") interim reporting requirements. Accordingly, the accompanying Condensed Consolidated Financial Statements do not include all disclosures required by accounting principles generally accepted in the United States of America ("GAAP") for full financial statements and should be read in conjunction with the Annual Consolidated Financial Statements for the years ended December 31, 2025, 2024 and 2023, collectively referred to as the "Annual Consolidated Financial Statements," included in our Annual Report on Form 10-K for the year ended December 31, 2025 (the "2025 Annual Report").

In the opinion of management, the Condensed Consolidated Financial Statements reflect all adjustments, including normal recurring adjustments necessary to fairly present the financial position, results of operations, and cash flows for the interim periods presented and contain adequate disclosures to make the information presented not misleading. The consolidated results of operations for interim periods are not necessarily indicative of the results expected for the full year.

The preparation of the Condensed Consolidated Financial Statements requires management to make estimates and assumptions with respect to the reported amounts of assets, liabilities, revenue, and expenses and the disclosure of contingent assets and liabilities. Actual results could differ from these estimates.