Basis of Presentation (Policies)	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 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.
Recently Adopted and Recently Issued Accounting Standards	2. Recently Adopted and Recently Issued Accounting Standards The following accounting standards were adopted during the six months ended June 30, 2026: The Company adopted a change issued by the FASB that provides an optional practical expedient for estimating future credit losses on current accounts receivable and current contract assets that arise from certain contracts with customers. The adoption of this change did not have a material impact on the Company's financial statements. The Company adopted changes issued by the FASB, which required greater disaggregation of income tax disclosures, related to the income tax rate reconciliation and income taxes paid for each annual reporting period. The Company applied the new disclosure requirements prospectively to its annual report for the year ended December 31, 2025. The adoption of these changes did not have a material impact on the Company's consolidated financial statements. The following accounting standards have been issued and become effective for the Company at a future date: In May 2026, the FASB issued an update that provides authoritative guidance on the recognition, measurement and presentation of environmental credits and compliance obligations that may be settled using environmental credits. This update defines environmental credit obligations and establishes recognition criteria, subsequent measurement and disclosure requirements. This guidance should be applied on a retrospective basis. This update becomes effective starting with the Company's annual financial statements for the year ended December 31, 2028 and includes the interim periods within each annual reporting period. Early adoption is permitted. The Company is currently evaluating the impact that this update will have on the Company's financial statements and disclosures. In December 2025, the FASB issued an update that provides authoritative guidance on the recognition, measurement and presentation of government grants received by business entities. This update defines government grants and establishes recognition criteria and disclosure requirements. This update becomes effective starting with the Company's annual financial statements for the year ended December 31, 2028 and includes the interim periods within each annual reporting period. Early adoption is permitted. The Company is currently evaluating the impact that this update will have on the Company's financial statements. In November 2024, the FASB issued changes which require disaggregated disclosure of income statement expenses within the footnotes to the financial statement for each interim and annual reporting period. The changes become effective starting with the Company's annual financial statements for the year ended December 31, 2027 and will be in effect for the Company's interim financial statements after December 31, 2027. The guidance should be applied on a prospective basis with the option to apply the standard retrospectively. Early adoption is permitted. The Company is currently evaluating the impact that this change will have on the Company's disclosures.

Basis of Presentation (Policies)

6 Months Ended

Jun. 30, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

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.

Recently Adopted and Recently Issued Accounting Standards

2. Recently Adopted and Recently Issued Accounting Standards

The following accounting standards were adopted during the six months ended June 30, 2026:

The Company adopted a change issued by the FASB that provides an optional practical expedient for estimating future credit losses on current accounts receivable and current contract assets that arise from certain contracts with customers. The adoption of this change did not have a material impact on the Company's financial statements.

The Company adopted changes issued by the FASB, which required greater disaggregation of income tax disclosures, related to the income tax rate reconciliation and income taxes paid for each annual reporting period. The Company applied the new disclosure requirements prospectively to its annual report for the year ended December 31, 2025. The adoption of these changes did not have a material impact on the Company's consolidated financial statements.

The following accounting standards have been issued and become effective for the Company at a future date:

In May 2026, the FASB issued an update that provides authoritative guidance on the recognition, measurement and presentation of environmental credits and compliance obligations that may be settled using environmental credits. This update defines environmental credit obligations and establishes recognition criteria, subsequent measurement and disclosure requirements. This guidance should be applied on a retrospective basis. This update becomes effective starting with the Company's annual financial statements for the year ended December 31, 2028 and includes the interim periods within each annual reporting period. Early adoption is permitted. The Company is currently evaluating the impact that this update will have on the Company's financial statements and disclosures.

In December 2025, the FASB issued an update that provides authoritative guidance on the recognition, measurement and presentation of government grants received by business entities. This update defines government grants and establishes recognition criteria and disclosure requirements. This update becomes effective starting with the Company's annual financial statements for the year ended December 31, 2028 and includes the interim periods within each annual reporting period. Early adoption is permitted. The Company is currently evaluating the impact that this update will have on the Company's financial statements.

In November 2024, the FASB issued changes which require disaggregated disclosure of income statement expenses within the footnotes to the financial statement for each interim and annual reporting period. The changes become effective starting with the Company's annual financial statements for the year ended December 31, 2027 and will be in effect for the Company's interim financial statements after December 31, 2027. The guidance should be applied on a prospective basis with the option to apply the standard retrospectively. Early adoption is permitted. The Company is currently evaluating the impact that this change will have on the Company's disclosures.