Basis of Presentation (Policies)	6 Months Ended
Jun. 30, 2025
Accounting Policies [Abstract]
Presentation	The consolidated financial statements included in this report reflect all normal and recurring adjustments which, in the opinion of management, are necessary for a fair presentation of our consolidated financial position at June 30, 2025 and December 31, 2024, the consolidated results of operations for the three and six months ended June 30, 2025 and 2024, and the consolidated cash flows for the six months ended June 30, 2025 and 2024. The Company has no items of other comprehensive income (loss); therefore, net income (loss) is equal to comprehensive income (loss). The unaudited results of operations for the interim periods reported are not necessarily indicative of results to be expected for the full year. The consolidated financial statements were prepared in accordance with the requirements of the Securities and Exchange Commission (“SEC”) for interim reporting. As permitted under those rules, certain notes or other financial information that are normally required by U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted from these interim consolidated financial statements. These financial statements, therefore, should be read in conjunction with the financial statements and related notes included in the Company’s annual report on Form 10‑K for the year ended December 31, 2024. We consolidate the activities of Hess Midstream Operations LP (the “Partnership”), as a variable interest entity (“VIE”) under GAAP. We have concluded that we are the primary beneficiary of the VIE, as defined in the accounting standards, since we have the power, through our ownership, to direct those activities that most significantly impact the economic performance of the Partnership. This conclusion was based on a qualitative analysis that considered the Partnership’s governance structure and the delegation of control provisions, which provide us with the ability to control the operations of the Partnership. All financial statement activities associated with the VIE are captured within gathering, processing and storage, and terminaling and export segments (see Note 11, Segments). We currently do not have any independent assets or operations other than our interest in the Partnership. At June 30, 2025, our noncontrolling interest represents an approximate 37.6% interest in the Partnership retained by our Sponsors (December 31, 2024: 52.3%). On May 30, 2025, GIP sold all of its limited partner interests in the Partnership and no longer holds a direct or indirect ownership interest in the Company, the Partnership or our general partner. On July 18, 2025, Hess and Chevron completed the previously announced merger contemplated by the Agreement and Plan of Merger, dated as of October 22, 2023 (the “Merger”). As a result of the Merger, Chevron is the direct parent of Hess and, therefore, indirectly owns an approximate 37.8% interest in the Company on a consolidated basis. See Note 2, Equity Transactions and Note 12, Subsequent Events for more details. There were no changes to our existing commercial agreements with Hess or our existing partnership agreement as a result of the Merger or GIP’s departure.
New Accounting Pronouncements	New Accounting Pronouncements In December 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. This ASU requires, among other disclosures, greater disaggregation of information, the use of certain categories in the rate reconciliation, and the disaggregation of income taxes paid by jurisdiction. The ASU will be effective for the Company for the year ending December 31, 2025. We do not expect this ASU to have a material impact on our consolidated financial statements. In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of income statement expenses. This ASU requires disclosure, in the notes to financial statements, of specified information about certain costs and expenses. The ASU is effective for public business entities for fiscal years beginning after December 15, 2026, and interim periods beginning after December 15, 2027, with early adoption permitted. We are currently evaluating the impact of this new ASU on our consolidated financial statements.

Basis of Presentation (Policies)

6 Months Ended

Jun. 30, 2025

The consolidated financial statements included in this report reflect all normal and recurring adjustments which, in the opinion of management, are necessary for a fair presentation of our consolidated financial position at June 30, 2025 and December 31, 2024, the consolidated results of operations for the three and six months ended June 30, 2025 and 2024, and the consolidated cash flows for the six months ended June 30, 2025 and 2024. The Company has no items of other comprehensive income (loss); therefore, net income (loss) is equal to comprehensive income (loss). The unaudited results of operations for the interim periods reported are not necessarily indicative of results to be expected for the full year.

The consolidated financial statements were prepared in accordance with the requirements of the Securities and Exchange Commission (“SEC”) for interim reporting. As permitted under those rules, certain notes or other financial information that are normally required by U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted from these interim consolidated financial statements. These financial statements, therefore, should be read in conjunction with the financial statements and related notes included in the Company’s annual report on Form 10‑K for the year ended December 31, 2024.

We consolidate the activities of Hess Midstream Operations LP (the “Partnership”), as a variable interest entity (“VIE”) under GAAP. We have concluded that we are the primary beneficiary of the VIE, as defined in the accounting standards, since we have the power, through our ownership, to direct those activities that most significantly impact the economic performance of the Partnership. This conclusion was based on a qualitative analysis that considered the Partnership’s governance structure and the delegation of control provisions, which provide us with the ability to control the operations of the Partnership. All financial statement activities associated with the VIE are captured within gathering, processing and storage, and terminaling and export segments (see Note 11, Segments). We currently do not have any independent assets or operations other than our interest in the Partnership. At June 30, 2025, our noncontrolling interest represents an approximate 37.6% interest in the Partnership retained by our Sponsors (December 31, 2024: 52.3%).

On May 30, 2025, GIP sold all of its limited partner interests in the Partnership and no longer holds a direct or indirect ownership interest in the Company, the Partnership or our general partner. On July 18, 2025, Hess and Chevron completed the previously announced merger contemplated by the Agreement and Plan of Merger, dated as of October 22, 2023 (the “Merger”). As a result of the Merger, Chevron is the direct parent of Hess and, therefore, indirectly owns an approximate 37.8% interest in the Company on a consolidated basis. See Note 2, Equity Transactions and Note 12, Subsequent Events for more details. There were no changes to our existing commercial agreements with Hess or our existing partnership agreement as a result of the Merger or GIP’s departure.

New Accounting Pronouncements

In December 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. This ASU requires, among other disclosures, greater disaggregation of information, the use of certain categories in the rate reconciliation, and the disaggregation of income taxes paid by jurisdiction. The ASU will be effective for the Company for the year ending December 31, 2025. We do not expect this ASU to have a material impact on our consolidated financial statements.

In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of income statement expenses. This ASU requires disclosure, in the notes to financial statements, of specified information about certain costs and expenses. The ASU is effective for public business entities for fiscal years beginning after December 15, 2026, and interim periods beginning after December 15, 2027, with early adoption permitted. We are currently evaluating the impact of this new ASU on our consolidated financial statements.