Basis of Presentation	6 Months Ended
Jun. 30, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	1. Basis of Presentation The Company has prepared these unaudited condensed consolidated financial statements in accordance with U.S. GAAP for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X of the SEC. Accordingly, the unaudited Condensed Consolidated Financial Statements do not include all information and disclosure required by U.S. GAAP for annual financial statements. The December 31, 2025 Condensed Consolidated Balance Sheet information contained in this Quarterly Report on Form 10-Q was derived from the 2025 audited consolidated financial statements. These unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements, including the notes thereto, included in the Company’s Information Statement (the "Information Statement"), dated May 8, 2026, attached as Exhibit 99.1 to the Company's Current Report on Form 8-K furnished to the SEC on May 11, 2026. In the opinion of management, all adjustments (all of which are of a normal recurring nature) that are necessary for a fair statement are reflected in these unaudited Condensed Consolidated Financial Statements. On June 1, 2026, the transactions contemplated by the Separation Agreement and the Merger Agreement, including the Holding Company Merger, the Distribution, the Merger and the Reorganization, were completed, resulting in the Company becoming a separate, publicly traded company that holds the Harsco Environmental and Rail segments and Veolia indirectly holding CE. Due to the size of the Company, the legal spinee, relative to CE Holdings, the legal spinnor, among other factors, Enviri is treated as the "accounting spinnor", notwithstanding the legal form of spin-off. The Company has also determined that Legacy Enviri represents the "accounting predecessor" to Enviri and Enviri represents the "accounting successor" to Legacy Enviri for accounting purposes. Therefore, the historical financial statements of Enviri, with respect to periods prior to June 1, 2026, are represented by the historical consolidated financial statements of Legacy Enviri, with CE reported as discontinued operations in accordance with ASC 205-20, Discontinued Operations. Therefore, the Company's Condensed Consolidated Statements of Operations for the three and six months ended June 30, 2025 have been recast to reflect the after tax operating results of CE in Income (loss) from discontinued operations, net of tax. In addition, certain costs related to the Transactions, interest expense related to the portion of the Company's total debt that was required to be repaid on June 1, 2026 and fees related to the Company's AR Facility that was required to be terminated at the closing of the Transactions, are also allocated to Income (loss) from discontinued operations, net of tax. CE's assets and liabilities have been reclassified as held-for-sale in the Company's Consolidated Balance Sheets as of December 31, 2025, which were previously classified as held-for-use. All disclosures have been updated to reflect these changes. See Note 4, Dispositions for additional information. The completion of the Transactions resulted in the exchange of one share of CE Holdings common stock for one share of Legacy Enviri common stock, and subsequently one share of Enviri common stock for every three shares of CE Holdings common stock. As such, the weighted-average shares outstanding and all earnings per share data for periods prior to the Transaction have been retrospectively adjusted to reflect the impact of the Transactions on the Company's capital structure Reclassifications Reclassifications have been made to prior year amounts to conform with current year classifications. These reclassifications did not have a material impact on the Company's Condensed Consolidated Financial Statements, including the notes thereto. Revision of Previously Issued Financial Statements During the year ended December 31, 2025, management identified certain errors related to the measurement of certain aspects of the defined benefit pension obligation associated with the U.K. pension plan (the “Plan”) administered by the Company. The errors related to the historic application of certain provisions governing pension benefits in the actuarial estimation of the liabilities for certain acquired pension plans merged into the Plan. The errors were identified by the Company during a review of the Plan in preparation for the potential buy-out of the Plan’s liabilities by an insurance company. Management evaluated the identified errors in accordance with ASC 250, Accounting Changes and Error Corrections, and applicable SEC guidance, including SAB 99, considering both quantitative and qualitative factors. Management concluded that the errors were not material to the Company’s previously issued consolidated financial statements for any individual period. However, due to the cumulative impact of these errors, the Company revised the prior-period financial statements. The revisions primarily affected Retirement plan assets and Retained earnings with corresponding impacts to Defined benefit pension income (expense) and Accumulated other comprehensive income (loss). In connection with the revision, the Company also corrected other previously identified immaterial errors. The revision did not impact the Company’s previously reported net cash flows or compliance with debt covenants.

The Company has prepared these unaudited condensed consolidated financial statements in accordance with U.S. GAAP for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X of the SEC. Accordingly, the unaudited Condensed Consolidated Financial Statements do not include all information and disclosure required by U.S. GAAP for annual financial statements. The December 31, 2025 Condensed Consolidated Balance Sheet information contained in this Quarterly Report on Form 10-Q was derived from the 2025 audited consolidated financial statements. These unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements, including the notes thereto, included in the Company’s Information Statement (the "Information Statement"), dated May 8, 2026, attached as Exhibit 99.1 to the Company's Current Report on Form 8-K furnished to the SEC on May 11, 2026. In the opinion of management, all adjustments (all of which are of a normal recurring nature) that are necessary for a fair statement are reflected in these unaudited Condensed Consolidated Financial Statements.

On June 1, 2026, the transactions contemplated by the Separation Agreement and the Merger Agreement, including the Holding Company Merger, the Distribution, the Merger and the Reorganization, were completed, resulting in the Company becoming a separate, publicly traded company that holds the Harsco Environmental and Rail segments and Veolia indirectly holding CE.

Due to the size of the Company, the legal spinee, relative to CE Holdings, the legal spinnor, among other factors, Enviri is treated as the "accounting spinnor", notwithstanding the legal form of spin-off. The Company has also determined that Legacy Enviri represents the "accounting predecessor" to Enviri and Enviri represents the "accounting successor" to Legacy Enviri for accounting purposes. Therefore, the historical financial statements of Enviri, with respect to periods prior to June 1, 2026, are represented by the historical consolidated financial statements of Legacy Enviri, with CE reported as discontinued operations in accordance with ASC 205-20, Discontinued Operations. Therefore, the Company's Condensed Consolidated Statements of Operations for the three and six months ended June 30, 2025 have been recast to reflect the after tax operating results of CE in Income (loss) from discontinued operations, net of tax. In addition, certain costs related to the Transactions, interest expense related to the portion of the Company's total debt that was required to be repaid on June 1, 2026 and fees related to the Company's AR Facility that was required to be terminated at the closing of the Transactions, are also allocated to Income (loss) from discontinued operations, net of tax. CE's assets and liabilities have been reclassified as held-for-sale in the Company's Consolidated Balance Sheets as of December 31, 2025, which were previously classified as held-for-use. All disclosures have been updated to reflect these changes. See Note 4, Dispositions for additional information.

The completion of the Transactions resulted in the exchange of one share of CE Holdings common stock for one share of Legacy Enviri common stock, and subsequently one share of Enviri common stock for every three shares of CE Holdings common stock. As such, the weighted-average shares outstanding and all earnings per share data for periods prior to the Transaction have been retrospectively adjusted to reflect the impact of the Transactions on the Company's capital structure

During the year ended December 31, 2025, management identified certain errors related to the measurement of certain aspects of the defined benefit pension obligation associated with the U.K. pension plan (the “Plan”) administered by the Company. The errors related to the historic application of certain provisions governing pension benefits in the actuarial estimation of the liabilities for certain acquired pension plans merged into the Plan. The errors were identified by the Company during a review of the Plan in preparation for the potential buy-out of the Plan’s liabilities by an insurance company.

Management evaluated the identified errors in accordance with ASC 250, Accounting Changes and Error Corrections, and applicable SEC guidance, including SAB 99, considering both quantitative and qualitative factors. Management concluded that the errors were not material to the Company’s previously issued consolidated financial statements for any individual period. However, due to the cumulative impact of these errors, the Company revised the prior-period financial statements.