ORGANIZATION, CORPORATE REORGANIZATION, BUSINESS OPERATIONS AND PRESENTATION AND CONSOLIDATION	12 Months Ended
Dec. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION, CORPORATE REORGANIZATION, BUSINESS OPERATIONS AND PRESENTATION AND CONSOLIDATION	1. ORGANIZATION, CORPORATE REORGANIZATION, BUSINESS OPERATIONS AND PRESENTATION AND CONSOLIDATION Organization. Summit Midstream Corporation (including its subsidiaries, collectively the “Company”) was incorporated under the laws of the State of Delaware on May 14, 2024 for the purpose of effecting the reorganization (the “Corporate Reorganization”) of Summit Midstream Partners, LP, a Delaware master limited partnership (“SMLP”), in which the Company was incorporated to serve as the new parent holding company of SMLP. The Company’s common stock, par value $0.01 per share (“common stock”), is listed on the New York Stock Exchange (“NYSE”) under the ticker symbol “SMC.” SMLP was formed in May 2012, and prior to August 1, 2024, SMLP’s common units were listed on the NYSE under the ticker symbol “SMLP.” Upon completion of the Tall Oak Acquisition (as defined herein) on December 2, 2024, ownership of SMLP shifted to an Up‑C tax structure, with the Company owning SMLP alongside holders of a noncontrolling limited partnership interest. The Company is a value-oriented company focused on developing, owning, and operating midstream energy infrastructure assets that are strategically located in the core producing areas of unconventional resource basins, primarily shale formations, in the continental U.S. The Company’s business activities are primarily conducted through various operating subsidiaries, each of which is owned or controlled by its subsidiary holding company, Summit Midstream Holdings, LLC, a Delaware limited liability company (“Summit Holdings”). Corporate Reorganization. In connection with the Corporate Reorganization, SMLP entered into an Agreement and Plan of Merger (the “Merger Agreement”), by and among SMLP, the Company, Summit SMC NewCo, LLC (“Merger Sub”), a wholly owned subsidiary of the Company, and Summit Midstream GP, LLC (the “General Partner”). Pursuant to the Merger Agreement, Merger Sub merged with and into SMLP (the “Merger”), with SMLP continuing as the surviving entity and a wholly owned subsidiary of the Company, with (i) each then outstanding common unit representing limited partner interests in SMLP automatically converting into the right to receive one share of the Company’s common stock and (ii) each then outstanding Series A Fixed to Floating Rate Cumulative Redeemable Perpetual Preferred Unit (“Series A Preferred Unit”) automatically converting into the right to receive one share of Series A Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Stock (“Series A Preferred Stock”) of the Company. The Merger was accounted for as a common-control transaction between SMLP and Summit Midstream Corporation as a result of SMLP’s unitholders controlling both SMLP and Summit Midstream Corporation before and after the Merger. Upon consummation of the Corporate Reorganization, Summit Midstream Corporation recognized (i) income tax expense in its consolidated statements of operations for temporary differences that existed as of the date of the Corporate Reorganization, (ii) a tax benefit to equity due to changes in tax basis in assets and liabilities and (iii) a net deferred tax liability in its consolidated balance sheet. Upon completion of the Merger, SMLP’s common limited partner capital accounts were eliminated and replaced with shares of common stock, paid in capital, and retained deficit. Additionally, the Series A Preferred Units were exchanged for an equivalent number of shares of Series A Preferred Stock, with no substantive changes in contractual terms or investor cash flows. As a result of the Corporate Reorganization, periods prior to August 1, 2024 reflect Summit Midstream as a limited partnership, not a corporation. References to common units for periods prior to the Corporate Reorganization refer to common units of SMLP, and references to common stock for periods following the Corporate Reorganization refer to shares of common stock of the Company. Business Operations. The Company provides natural gas gathering, compression, treating, and processing services as well as crude oil and produced water gathering services pursuant to primarily long-term, fee-based agreements with its customers. In addition to these services, the Company also provides freshwater delivery services pursuant to short-term agreements with customers. The Company’s results are primarily driven by the volumes of natural gas that it transports, gathers, compresses, treats and/or processes as well as by the volumes of crude oil and produced water that it gathers. Presentation and Consolidation. The Company prepares its consolidated financial statements in accordance with GAAP as established by the FASB. The Company makes estimates and assumptions that affect the reported amounts of assets and liabilities at the balance sheet dates, including fair value measurements, the reported amounts of revenues and expenses and the disclosure of commitments and contingencies. Although management believes these estimates are reasonable, actual results could differ from its estimates. The consolidated financial statements include the assets, liabilities, and results of operations of Summit Midstream Corporation and its subsidiaries. All intercompany transactions among the consolidated entities have been eliminated in consolidation. Comprehensive income or loss is the same as net income or loss for all periods presented.

Organization. Summit Midstream Corporation (including its subsidiaries, collectively the “Company”) was incorporated under the laws of the State of Delaware on May 14, 2024 for the purpose of effecting the reorganization (the “Corporate Reorganization”) of Summit Midstream Partners, LP, a Delaware master limited partnership (“SMLP”), in which the Company was incorporated to serve as the new parent holding company of SMLP. The Company’s common stock, par value $0.01 per share (“common stock”), is listed on the New York Stock Exchange (“NYSE”) under the ticker symbol “SMC.” SMLP was formed in May 2012, and prior to August 1, 2024, SMLP’s common units were listed on the NYSE under the ticker symbol “SMLP.” Upon completion of the Tall Oak Acquisition (as defined herein) on December 2, 2024, ownership of SMLP shifted to an Up‑C tax structure, with the Company owning SMLP alongside holders of a noncontrolling limited partnership interest.

The Company is a value-oriented company focused on developing, owning, and operating midstream energy infrastructure assets that are strategically located in the core producing areas of unconventional resource basins, primarily shale formations, in the continental U.S. The Company’s business activities are primarily conducted through various operating subsidiaries, each of which is owned or controlled by its subsidiary holding company, Summit Midstream Holdings, LLC, a Delaware limited liability company (“Summit Holdings”).

Corporate Reorganization. In connection with the Corporate Reorganization, SMLP entered into an Agreement and Plan of Merger (the “Merger Agreement”), by and among SMLP, the Company, Summit SMC NewCo, LLC (“Merger Sub”), a wholly owned subsidiary of the Company, and Summit Midstream GP, LLC (the “General Partner”). Pursuant to the Merger Agreement, Merger Sub merged with and into SMLP (the “Merger”), with SMLP continuing as the surviving entity and a wholly owned subsidiary of the Company, with (i) each then outstanding common unit representing limited partner interests in SMLP automatically converting into the right to receive one share of the Company’s common stock and (ii) each then outstanding Series A Fixed to Floating Rate Cumulative Redeemable Perpetual Preferred Unit (“Series A Preferred Unit”) automatically converting into the right to receive one share of Series A Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Stock (“Series A Preferred Stock”) of the Company. The Merger was accounted for as a common-control transaction between SMLP and Summit Midstream Corporation as a result of SMLP’s unitholders controlling both SMLP and Summit Midstream Corporation before and after the Merger. Upon consummation of the Corporate Reorganization, Summit Midstream Corporation recognized (i) income tax expense in its consolidated statements of operations for temporary differences that existed as of the date of the Corporate Reorganization, (ii) a tax benefit to equity due to changes in tax basis in assets and liabilities and (iii) a net deferred tax liability in its consolidated balance sheet. Upon completion of the Merger, SMLP’s common limited partner capital accounts were eliminated and replaced with shares of common stock, paid in capital, and retained deficit. Additionally, the Series A Preferred Units were exchanged for an equivalent number of shares of Series A Preferred Stock, with no substantive changes in contractual terms or investor cash flows.

Business Operations. The Company provides natural gas gathering, compression, treating, and processing services as well as crude oil and produced water gathering services pursuant to primarily long-term, fee-based agreements with its customers. In addition to these services, the Company also provides freshwater delivery services pursuant to short-term agreements with customers. The Company’s results are primarily driven by the volumes of natural gas that it transports, gathers, compresses, treats and/or processes as well as by the volumes of crude oil and produced water that it gathers.

Presentation and Consolidation. The Company prepares its consolidated financial statements in accordance with GAAP as established by the FASB. The Company makes estimates and assumptions that affect the reported amounts of assets and liabilities at the balance sheet dates, including fair value measurements, the reported amounts of revenues and expenses and the disclosure of commitments and contingencies. Although management believes these estimates are reasonable, actual results could differ from its estimates. The consolidated financial statements include the assets, liabilities, and results of operations of Summit Midstream Corporation and its subsidiaries. All intercompany transactions among the consolidated entities have been eliminated in consolidation. Comprehensive income or loss is the same as net income or loss for all periods presented.