Hess Midstream (HESM) 10-Q4 Aug 222022 Q2 Quarterly reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2022	Jul. 29, 2022
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Trading Symbol	HESM
Entity Registrant Name	Hess Midstream LP
Entity Central Index Key	0001789832
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Entity File Number	001-39163
Entity Tax Identification Number	84-3211812
Entity Address, Address Line One	1501 McKinney Street
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77010
City Area Code	713
Local Phone Number	496-4200
Entity Common Stock, Shares Outstanding		44,002,846
Document Quarterly Report	true
Document Transition Report	false
Entity Incorporation, State or Country Code	DE
Title of 12(b) Security	Class A shares representing limited partner interests
Security Exchange Name	NYSE
Entity Interactive Data Current	Yes

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Assets
Cash and cash equivalents	$ 2.4	$ 2.2
Accounts receivable—affiliate:
From contracts with customers	153.6	120.3
Other current assets	2.4	10.6
Total current assets	158.4	133.1
Equity investments	96.9	101.6
Property, plant and equipment, net	3,144.6	3,125
Long-term receivable—affiliate	0.7	0.8
Deferred tax asset	191.6	117.3
Other noncurrent assets	6.5	7.8
Total assets	3,598.7	3,485.6
Liabilities
Accounts payable—trade	32.3	26.9
Accounts payable—affiliate	28.2	37.6
Accrued liabilities	85.1	76.2
Current maturities of long-term debt		20
Other current liabilities	6.9	10.2
Total current liabilities	152.5	170.9
Long-term debt	2,937.4	2,543.5
Deferred tax liability	0.4	0.4
Other noncurrent liabilities	20.9	17.7
Total liabilities	3,111.2	2,732.5
Partners' capital
Total partners' capital	248.7	204.1
Noncontrolling interest	238.8	549
Total partners' capital	487.5	753.1
Total liabilities and partners' capital	3,598.7	3,485.6
Class A Shares
Partners' capital
Common unitholders	$ 248.7	$ 204.1

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - shares	Jun. 30, 2022	Dec. 31, 2021
Class A Shares
Common units issued	44,002,846	33,672,068
Common units outstanding	44,002,846	33,672,068
Class B Shares
Common units issued	195,847,606	219,641,928
Common units outstanding	195,847,606	219,641,928

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues
Affiliate services	$ 313	$ 294.8	$ 625.1	$ 583.6
Type of Revenue [Extensible List]	us-gaap:ServiceMember	us-gaap:ServiceMember	us-gaap:ServiceMember	us-gaap:ServiceMember
Other income	$ 0.4		$ 0.7
Total revenues	313.4	$ 294.8	625.8	$ 583.6
Costs and expenses
Operating and maintenance expenses (exclusive of depreciation shown separately below)	67.8	63.6	134.3	123.4
Depreciation expense	45	40.4	89.4	80.6
General and administrative expenses	5.3	5.2	11.3	11.5
Total costs and expenses	118.1	109.2	235	215.5
Income from operations	195.3	185.6	390.8	368.1
Income from equity investments	1	2.9	1.4	5.6
Interest expense, net	37.4	22.9	68.7	46
Income before income tax expense	158.9	165.6	323.5	327.7
Income tax expense	7.1	3.6	12.1	6.1
Net income	151.8	162	311.4	321.6
Less: Net income attributable to noncontrolling interest	129.8	151	272.5	302
Net income attributable to Hess Midstream LP	$ 22	$ 11	$ 38.9	$ 19.6
Class A Shares
Net income attributable to Hess Midstream LP per Class A share:
Net income attributable to Hess Midstream LP per Class A share, Basic	$ 0.51	$ 0.44	$ 1.01	$ 0.89
Net income attributable to Hess Midstream LP per Class A share, Diluted	$ 0.50	$ 0.44	$ 0.99	$ 0.87
Weighted average Class A shares outstanding
Weighted average Class A shares outstanding subsequent to the restructuring, Basic	43.7	25	38.7	22.2
Weighted average Class A shares outstanding subsequent to the restructuring, Diluted	43.7	25.1	38.8	22.3

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL (UNAUDITED) - USD ($) $ in Millions	Total	Limited Partner Class A Shares	Noncontrolling Interest
Balance, beginning of period at Dec. 31, 2020	$ 1,326	$ 125	$ 1,201
Net income	159.6	8.6	151
Equity-based compensation	0.4	0.4
Distributions to unitholders	(127.3)	(8.2)	(119.1)
Recognition of deferred tax asset	26.4	26.4
Sales of shares held by Sponsors		31.8	(31.8)
Balance, end of period at Mar. 31, 2021	1,385.1	184	1,201.1
Balance, beginning of period at Dec. 31, 2020	1,326	125	1,201
Net income	321.6
Balance, end of period at Jun. 30, 2021	1,418.6	184	1,234.6
Balance, beginning of period at Mar. 31, 2021	1,385.1	184	1,201.1
Net income	162	11	151
Equity-based compensation	0.3	0.3
Distributions to unitholders	(128.8)	(11.3)	(117.5)
Balance, end of period at Jun. 30, 2021	1,418.6	184	1,234.6
Balance, beginning of period at Dec. 31, 2021	753.1	204.1	549
Net income	159.6	16.9	142.7
Equity-based compensation	0.5	0.5
Distributions to unitholders	(131)	(17.5)	(113.5)
Transaction costs	(0.4)	(0.1)	(0.3)
Balance, end of period at Mar. 31, 2022	781.8	203.9	577.9
Balance, beginning of period at Dec. 31, 2021	753.1	204.1	549
Net income	311.4
Balance, end of period at Jun. 30, 2022	487.5	248.7	238.8
Balance, beginning of period at Mar. 31, 2022	781.8	203.9	577.9
Net income	151.8	22	129.8
Equity-based compensation	0.4	0.4
Distributions to unitholders	(131.8)	(24.2)	(107.6)
Recognition of deferred tax asset	86.4	86.4
Sales of shares held by Sponsors		27	(27)
Class B unit repurchase	(400)	(66.6)	(333.4)
Transaction costs	(1.1)	(0.2)	(0.9)
Balance, end of period at Jun. 30, 2022	$ 487.5	$ 248.7	$ 238.8

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL (UNAUDITED) (Parenthetical) - $ / shares	3 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021
Statement of Partners' Capital [Abstract]
Distributions to unitholders - per share	$ 0.5492	$ 0.5167	$ 0.4526	$ 0.4471

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities
Net income	$ 311.4	$ 321.6
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation expense	89.4	80.6
(Income) loss from equity investments	(1.4)	(5.6)
Distributions from equity investments	6.1	11.5
Amortization of deferred financing costs	4.2	3.4
Equity-based compensation expense	0.9	0.7
Deferred income tax expense (benefit)	12.1	6.1
Changes in assets and liabilities:
Accounts receivable – affiliate	(33.2)	(12)
Other current and noncurrent assets	8.4	3.9
Accounts payable – trade	5.4	(8.5)
Accounts payable – affiliate	(5.7)	(1)
Accrued liabilities	6.8	(5.9)
Other current and noncurrent liabilities	(0.6)	(4.8)
Net cash provided by (used in) operating activities	403.8	390
Cash flows from investing activities
Additions to property, plant and equipment	(110.7)	(52.7)
Net cash provided by (used in) investing activities	(110.7)	(52.7)
Cash flows from financing activities
Net proceeds from (repayments of) bank borrowings with maturities of 90 days or less	(13)	(75)
Bank borrowings with maturities of greater than 90 days
Repayments	(10)	(5)
Proceeds from issuance of bonds	400
Deferred financing costs	(5.9)
Transaction costs	(1.2)
Class B unit repurchase	(400)
Distributions to shareholders/unitholders	(41.7)	(19.5)
Distributions to noncontrolling interest	(221.1)	(236.6)
Net cash provided by (used in) financing activities	(292.9)	(336.1)
Increase (decrease) in cash and cash equivalents	0.2	1.2
Cash and cash equivalents, beginning of period	2.2	2.6
Cash and cash equivalents, end of period	2.4	3.8
Supplemental disclosure of non-cash investing and financing activities:
(Increase) decrease in accrued capital expenditures and related liabilities	1.9	(16.8)
Recognition of deferred tax asset	$ 86.4	$ 26.4

Description of Business

Description of Business	6 Months Ended
Description of Business	Jun. 30, 2022
Description Of Business [Abstract]
Description of Business	Note 1. Description of Business Hess Midstream LP (“the Company”) is a fee-based, growth-oriented, Delaware limited partnership that operates, develops and acquires a diverse set of midstream assets and provides fee-based services to Hess Corporation (“Hess”) and third-party customers. We are managed and controlled by Hess Midstream GP LLC, the general partner of our general partner that is owned 50 / 50 by Hess and GIP II Blue Holding, L.P. (“GIP” and together with Hess, the “Sponsors”). Our assets are primarily located in the Bakken and Three Forks shale plays in the Williston Basin area of North Dakota, which we collectively refer to as the Bakken. Our assets and operations are organized into the following three reportable segments: (1) gathering, (2) processing and storage and (3) terminaling and export (see Note 13, Segments ). Unless the context otherwise requires, references in this report to the “Company,” “we,” “our,” “us” or like terms, refer to Hess Midstream LP and its subsidiaries.

Basis of Presentation

Basis of Presentation	6 Months Ended
Basis of Presentation	Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Note 2. Basis of 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, 2022 and December 31, 2021, the consolidated results of operations for the three and six months ended June 30, 2022 and 2021, and the consolidated cash flows for the six months ended June 30, 2022 and 2021. 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, 2021. We consolidate the activities of Hess Midstream Operations LP (“the Partnership”), as a variable interest entity (“VIE”) under U.S. 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 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 13, Segments ). We currently do not have any independent assets or operations other than our interest in the Partnership. Our noncontrolling interest represents the approximate 81.7 % interest in the Partnership retained by Hess and GIP at June 30, 2022 ( 86.7 % at December 31, 2021). See Note 3, Equity Transactions for a description of changes in noncontrolling interest related to the equity transactions.

Equity Transactions

Equity Transactions	6 Months Ended
Equity Transactions	Jun. 30, 2022
Equity [Abstract]
Equity Transactions	Note 3. Equity Transactions Equity Offering Transactions On March 15, 2021, the Sponsors sold an aggregate of 6,900,000 of our Class A shares representing limited partner interests (“Class A Shares”), inclusive of the underwriters’ option to purchase up to 900,000 of additional shares, which was fully exercised, in an underwritten public offering at a price of $ 21.00 per Class A Share, less underwriting discounts. The Sponsors received net proceeds from the offering of approximately $ 139.9 million, after deducting underwriting discounts. On April 4, 2022, the Sponsors sold an aggregate of 10,235,000 of our Class A Shares, inclusive of the underwriters’ option to purchase up to 1,335,000 of additional shares, which was fully exercised, in an underwritten public offering at a price of $ 29.50 per Class A Share, less underwriting discounts. The Sponsors received net proceeds from the offering of approximately $ 291.7 million, after deducting underwriting discounts. The Company did no t receive any proceeds in the offerings. The above equity offering transactions were conducted pursuant to a registration rights agreement among us and the Sponsors. The Class A Shares sold in the offerings were obtained by the Sponsors by exchanging to us the respective number of their Class B Units in the Partnership, together with an equal number of our Class B Shares and, a s a result, the total number of Class A and Class B Shares did not change. The Company retained control in the Partnership based on the delegation of control provisions, as described in Note 2, Basis of Presentation . As a result of the equity offering transactions described above, we recognized adjustments increasing the amount of the Class A shareholders’ capital balance by $ 27.0 million and decreasing the carrying amount of noncontrolling interest by an equal amount (six months ended June 30, 2021: $ 31.8 million) to reflect the change in ownership interest. Class B Unit Repurchase On March 29, 2022, the Company, the Partnership and our Sponsors entered into a unit repurchase agreement pursuant to which the Partnership agreed to purchase from the Sponsors, subject to the secondary equity offering transaction described above, an aggregate number of Class B Units representing limited partner interests in the Partnership to be determined by dividing (a) $ 400.0 million by (b) the public offering price of the Class A Shares to be set in the secondary offering (the “Repurchase Transaction”). On April 4, 2022, the Repurchase Transaction closed, and the Partnership purchased directly from the Sponsors 13,559,322 Class B Units at a purchase price per Class B Unit of $ 29.50 , which is equal to the public offering price per Class A Share in the transaction described above. Pursuant to the terms of the repurchase agreement, immediately following the purchase of the Class B Units from the Sponsors, the Partnership cancelled those units, and the Company cancelled, for no consideration, an equal number of Class B Shares representing limited partner interests in the Company held by the Company’s general partner. The Repurchase Transaction was funded using borrowings under the Partnership’s revolving credit facility, which were subsequently repaid with proceeds from a $ 400.0 million senior unsecured notes offering (see Note 7, Debt and Interest Expense ). The Repurchase Transaction was accounted for in accordance with ASC 810 whereby changes in a parent’s ownership interest while the parent retains its controlling financial interest in its subsidiary are accounted for as equity transactions. The carrying amount of the noncontrolling interest was adjusted to reflect the change in the ownership interest with the difference between the amount of consideration paid and the amount by which the noncontrolling interest was adjusted recognized as a reduction in equity attributable to Class A shareholders. We incurred approximately $ 1.5 million of costs directly attributable to the Repurchase Transaction that were charged to equity. As a result of the equity offering transactions and the Repurchase Transaction described above, we also recognized an additional deferred tax asset of $ 86.4 million (six months ended June 30, 2021: $ 26.4 million) related to the change in the temporary difference between carrying amount and tax basis of our investment in the Partnership. The effect of recognizing the additional deferred tax asset was included in Class A shareholders’ equity balance in the accompanying consolidated statement of changes in partners’ capital due to the transaction being characterized as a transaction among or with shareholders.

Related Party Transactions

Related Party Transactions	6 Months Ended
Related Party Transactions	Jun. 30, 2022
Related Party Transactions [Abstract]
Related Party Transactions	Note 4. Related Party Transactions In addition to the Repurchase Transaction and distributions to the Sponsors disclosed elsewhere in the Notes to consolidated financial statements, we had the following related party transactions: Commercial Agreements Effective January 1, 2014, we entered into long-term fee-based (i) gas gathering, (ii) crude oil gathering, (iii) gas processing and fractionation, (iv) storage services, and (v) terminal and export services agreements with certain subsidiaries of Hess. Effective January 1, 2019, we entered into long-term fee-based water services agreements with a subsidiary of Hess. For the services performed under these commercial agreements, we receive a fee per barrel of crude oil, barrel of water, Mcf of natural gas, or Mcf equivalent of NGLs, as applicable, delivered during each month, and Hess is obligated to provide us with minimum volumes of crude oil, water, natural gas and NGLs. Minimum volume commitments (“MVCs”) are equal to 80 % of Hess’ nominations in each development plan that apply on a three-year rolling basis such that MVCs are set for the three years following the most recent nomination. Without our consent, the MVCs resulting from the nominated volumes for any quarter or year contained in any prior development plan shall not be reduced by any updated development plan unless dedicated production is released by us. The applicable MVCs may, however, be increased as a result of the nominations contained in any such updated development plan. Except for the water services agreements and except for a certain gathering sub-system as described below, each of our commercial agreements with Hess has an initial 10 -year term effective January 1, 2014 (“Initial Term”). For this gathering sub-system, the Initial Term is 15 years effective January 1, 2014 and for the water services agreements the Initial Term is 14 years effective January 1, 2019. Each of our commercial agreements other than our storage services agreement includes an inflation escalator and a fee recalculation mechanism that allows fees to be adjusted annually during the Initial Term for updated estimates of cumulative throughput volumes and our capital and operating expenditures in order to target a return on capital deployed over the Initial Term of the applicable commercial agreement (or, with respect to the crude oil services fee under our terminal and export services agreement, the 20 -year period commencing on the effective date of the agreement). We have the unilateral right, exercisable by the delivery of a written notice on or before the date that is three years prior to the expiration of the Initial Term, to extend each commercial agreement for one additional 10 -year term (“Secondary Term”). For a certain gathering sub-system, the Secondary Term is 5 -years and for the water services agreements the Secondary Term is 10 years. On December 30, 2020, we exercised our renewal options to extend the terms of certain crude oil gathering, terminaling, storage, gas processing and gas gathering commercial agreements with Hess for the Secondary Term through December 31, 2033. There were no changes to any provisions of the existing commercial agreements as a result of the exercise of the renewal options. For the remaining water gathering and disposal agreements as well as the remaining gas gathering agreement, we have the sole option to renew these agreements for an additional term that is exercisable at a later date. During the Secondary Term of each of our commercial agreements other than our storage services agreement and terminal and export services agreement (with respect to crude oil terminaling services), the fee recalculation model under each applicable agreement will be replaced by an inflation-based fee structure. The initial fee for the first year of the Secondary Term will be determined based on the average fees paid by Hess under the applicable agreement during the last three years of the Initial Term (with such fees adjusted for inflation through the first year of the Secondary Term). For each year following the first year of the Secondary Term, the applicable fee will be adjusted annually based on the percentage change in the consumer price index, provided that we may not increase any fee by more than 3 % in any calendar year solely by reason of an increase in the consumer price index, and no fee will ever be reduced below the amount of the applicable fee payable by Hess in the prior year as a result of a decrease in the consumer price index. During the Secondary Term of our commercial agreements, Hess will continue to have MVCs equal to 80 % of Hess’ nominations in each development plan that apply on a three-year rolling basis through the Secondary Term. For the three and six months ended June 30, 2022 and 2021, approximately 100 % of our revenues were attributable to our fee‑based commercial agreements with Hess, including revenues from third‑party volumes contracted with Hess and delivered to us under these agreements. We retain control of our assets and the flow of volumes based on available capacity within our integrated gathering, processing and terminaling systems. Together with Hess, we are pursuing strategic relationships with third‑party producers and other midstream companies with operations in the Bakken in order to maximize our utilization rates. Revenues from contracts with customers on a disaggregated basis are as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in millions) Oil and gas gathering services $ 148.4 $ 133.4 $ 293.7 $ 262.1 Processing and storage services 116.5 105.3 230.3 208.8 Terminaling and export services 30.3 34.9 65.0 67.5 Water gathering and disposal services 17.8 21.2 36.1 45.2 Total revenues from contracts with customers $ 313.0 $ 294.8 $ 625.1 $ 583.6 Other income 0.4 - 0.7 - Total revenues $ 313.4 $ 294.8 $ 625.8 $ 583.6 The following table presents MVC shortfall fees earned during each period: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in millions) Oil and gas gathering services $ 30.5 $ 9.4 $ 51.8 $ 16.9 Processing and storage services 16.5 - 22.8 - Terminaling and export services 10.3 7.7 16.6 12.7 Water gathering and disposal services 0.4 1.6 0.4 2.5 Total $ 57.7 $ 18.7 $ 91.6 $ 32.1 The following table presents third-party pass-through costs for which we recognize revenues in an amount equal to the costs. These third-party costs are included in Operating and maintenance expenses in the accompanying unaudited consolidated statements of operations. Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in millions) Electricity and other related fees $ 12.0 $ 9.9 $ 22.5 $ 19.2 Produced water trucking and disposal costs 7.9 8.7 15.8 18.1 Rail transportation costs - - 4.3 0.1 Total $ 19.9 $ 18.6 $ 42.6 $ 37.4 Omnibus and Employee Secondment Agreements Under our omnibus and employee secondment agreements, Hess provides substantial operational and administrative services to us in support of our assets and operations. For the three and six months ended June 30, 2022 and 2021, we had the following charges from Hess. The classification of these charges between operating and maintenance expenses and general and administrative expenses is based on the fundamental nature of the services being performed for our operations. Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in millions) Operating and maintenance expenses $ 16.7 $ 15.8 $ 33.6 $ 31.5 General and administrative expenses 3.8 3.6 7.5 7.8 Total $ 20.5 $ 19.4 $ 41.1 $ 39.3 LM4 Agreements Separately from our commercial agreements with Hess, we entered into a gas processing agreement with Little Missouri 4 (“LM4”), a 50 / 50 joint venture with Targa Resources Corp., under which we pay a processing fee per Mcf of natural gas and reimburse LM4 for our proportionate share of electricity costs. These processing fees are included in Operating and maintenance expenses in the accompanying consolidated statements of operations. In addition, we share profits and losses and receive distributions from LM4 under the LM4 amended and restated limited liability company agreement based on our ownership interest. For the three and six months ended June 30, 2022 and 2021, we had the following activity related to our agreements with LM4: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in millions) Processing fee incurred $ 4.7 $ 7.1 $ 9.2 $ 14.0 Earnings from equity investments 1.0 2.9 1.4 5.6 Distributions received from equity investments 1.4 4.0 6.1 11.5

Property, Plant and Equipment

Property, Plant and Equipment	6 Months Ended
Property, Plant and Equipment	Jun. 30, 2022
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Note 5. Property, Plant and Equipment Property, plant and equipment, at cost, is as follows: Estimated useful lives June 30, 2022 December 31, 2021 (in millions, except for number of years) Gathering assets Pipelines 22 years $ 1,526.0 $ 1,489.7 Compressors, pumping stations and terminals 22 to 25 years 859.8 809.0 Gas plant assets Pipelines, pipes and valves 22 to 25 years 460.0 460.0 Equipment 12 to 30 years 428.2 428.3 Processing and fractionation facilities 25 years 413.2 408.7 Buildings 35 years 182.3 182.3 Logistics facilities and railcars 20 to 25 years 386.7 386.5 Storage facilities 20 to 25 years 19.5 19.5 Other 20 to 25 years 25.8 25.8 Construction-in-progress N/A 148.7 131.6 Total property, plant and equipment, at cost 4,450.2 4,341.4 Accumulated depreciation ( 1,305.6 ) ( 1,216.4 ) Property, plant and equipment, net $ 3,144.6 $ 3,125.0

Accrued Liabilities

Accrued Liabilities	6 Months Ended
Accrued Liabilities	Jun. 30, 2022
Accrued Liabilities, Current [Abstract]
Accrued Liabilities	Note 6. Accrued Liabilities Accrued liabilities are as follows: June 30, 2022 December 31, 2021 (in millions) Accrued interest $ 35.1 $ 30.9 Accrued capital expenditures 28.0 26.5 Other accruals 22.0 18.8 Total $ 85.1 $ 76.2

Debt and Interest Expense

Debt and Interest Expense	6 Months Ended
Debt and Interest Expense	Jun. 30, 2022
Debt Disclosure [Abstract]
Debt and Interest Expense	Note 7. Debt and Interest Expense Fixed‑Rate Senior Notes On April 8, 2022, the Partnership issued $ 400.0 million aggregate principal amount of 5.500 % fixed-rate senior unsecured notes due 2030 to qualified institutional investors. Interest is payable semi‑annually on April 15 and October 15, commencing October 15, 2022. The Partnership used the proceeds to repay the borrowings under its revolving credit facility used to finance the Repurchase Transaction (see Note 3, Equity Transactions ). As of June 30, 2022, the Partnership had $ 750.0 million aggregate principal amount of 4.250 % fixed‑rate senior unsecured notes due 2030 that were issued to qualified institutional investors. Interest is payable semi‑annually on February 15 and August 15. As of June 30, 2022, the Partnership also had $ 550.0 million aggregate principal amount of 5.125 % fixed‑rate senior unsecured notes due 2028 that were issued to qualified institutional investors. Interest is payable semi‑annually on June 15 and December 15. In addition, as of June 30, 2022, the Partnership had $ 800.0 million aggregate principal amount of 5.625 % fixed‑rate senior unsecured notes due 2026 that were issued to qualified institutional investors. Interest is payable semi‑annually on February 15 and August 15. The notes described above are guaranteed by certain subsidiaries of the Partnership. Each of the indentures for the senior unsecured notes described above contains customary covenants that restrict our ability and the ability of our restricted subsidiaries to (i) declare or pay any dividend or make any other restricted payments; (ii) transfer or sell assets or subsidiary stock; (iii) incur additional debt; or (iv) make restricted investments, unless, at the time of and immediately after giving pro forma effect to such restricted payments and any related incurrence of indebtedness or other transactions, no default has occurred and is continuing or would occur as a consequence of such restricted payment and if the leverage ratio does not exceed 4.25 to 1.00. As of June 30, 2022, we were in compliance with all debt covenants under the indentures. In addition, the covenants included in the indentures governing the senior unsecured notes contain provisions that allow the Company to satisfy the Partnership’s reporting obligations under the indenture, as long as any such financial information of the Company contains information reasonably sufficient to identify the material differences, if any, between the financial information of the Company, on the one hand, and the Partnership and its subsidiaries on a stand-alone basis, on the other hand and the Company does not directly own capital stock of any person other than the Partnership and its subsidiaries, or material business operations that would not be consolidated with the financial results of the Partnership and its subsidiaries. The Company is a holding company and has no independent assets or operations. Other than the interest in the Partnership and the effect of federal and state income taxes that are recognized at the Company level, there are no material differences between the consolidated financial statements of the Partnership and the consolidated financial statements of the Company. Credit Facilities As of June 30, 2022, the Partnership had senior secured credit facilities (the “Credit Facilities”) consisting of a $ 1,000.0 million 5 -year revolving credit facility and a $ 400.0 million 5 -year Term Loan A facility, which was initially fully drawn, maturing in 2024 . Facility fees accrue on the total capacity of the revolving credit facility. Borrowings under the 5 -year Term Loan A facility generally bear interest at LIBOR plus the applicable margin ranging from 1.55 % to 2.50 %, while the applicable margin for the 5 -year syndicated revolving credit facility ranges from 1.275 % to 2.000 %. Pricing levels for the facility fee and interest rate margins are based on the Partnership’s ratio of total debt to EBITDA (as defined in the Credit Facilities). If the Partnership obtains an investment grade credit rating, the pricing levels will be based on the Partnership’s credit ratings in effect from time to time. At June 30, 2022, borrowings of $ 91.0 million were drawn and outstanding under the Partnership’s revolving credit facility, and borrowings of $ 380.0 m illion, excluding deferred issuance costs, were drawn and outstanding under the Partnership’s Term Loan A facility. The Credit Facilities can be used for borrowings and letters of credit for general corporate purposes. The Credit Facilities are guaranteed by each direct and indirect wholly owned material domestic subsidiary of the Partnership, and are secured by first priority perfected liens on substantially all of the presently owned and after-acquired assets of the Partnership and its direct and indirect wholly owned material domestic subsidiaries, including equity interests directly owned by such entities, subject to certain customary exclusions. The Credit Facilities contain representations and warranties, affirmative and negative covenants and events of default that the Partnership considers to be customary for an agreement of this type, including a covenant that requires the Partnership to maintain a ratio of total debt to EBITDA (as defined in the Credit Facilities) for the prior four fiscal quarters of not greater than 5.00 to 1.00 as of the last day of each fiscal quarter ( 5.50 to 1.00 during the specified period following certain acquisitions) and, prior to the Partnership obtaining an investment grade credit rating, a ratio of secured debt to EBITDA for the prior four fiscal quarters of not greater than 4.00 to 1.00 as of the last day of each fiscal quarter. As of June 30, 2022, the Partnership was in compliance with these financial covenants. On July 14, 2022, the Partnership amended and restated its Credit Facilities. See Note 14, Subsequent Events . Fair Value Measurement At June 30, 2022, our total debt had a carrying value of $ 2,937.4 million and had a fair value of approximately $ 2,691.7 million, based on Level 2 inputs in the fair value measurement hierarchy. The carrying value of the amounts under the Term Loan A facility and revolving credit facility at June 30, 2022, approximated their fair value. Any changes in interest rates do not impact cash outflows associated with fixed rate interest payments or settlement of debt principal, unless a debt instrument is repurchased prior to maturity.

Partners' Capital and Distribut

Partners' Capital and Distributions	6 Months Ended
Partners' Capital and Distributions	Jun. 30, 2022
Partners' Capital Notes [Abstract]
Partners' Capital and Distributions	Note 8. Partners’ Capital and Distributions Our partnership agreement requires that, within 45 days after the end of each quarter, we distribute all of our available cash, as defined in the partnership agreement, to shareholders of record on the applicable record date. The following table details the distributions declared and/or paid for the periods presented: z Period Record Date Distribution Date Distribution per Class A share First Quarter 2021 May 3, 2021 May 13, 2021 $ 0.4526 Second Quarter 2021 August 9, 2021 August 13, 2021 $ 0.5042 Third Quarter 2021 November 4, 2021 November 12, 2021 $ 0.5104 Fourth Quarter 2021 February 3, 2022 February 14, 2022 $ 0.5167 First Quarter 2022 May 5, 2022 May 13, 2022 $ 0.5492 Second Quarter 2022 (1) August 4, 2022 August 12, 2022 $ 0.5559 (1) For more information, see Note 14, Subsequent Events.

Equity-Based Compensation

Equity-Based Compensation	6 Months Ended
Equity-Based Compensation	Jun. 30, 2022
Share-based Payment Arrangement [Abstract]
Equity-Based Compensation	Note 9. Equity‑Based Compensation Equity‑based award activity for the six months ended June 30, 2022 is as follows: Weighted Average Award Date Number of Shares Fair Value Outstanding and unvested shares at December 31, 2021 187,931 $ 16.75 Granted 53,548 33.52 Vested ( 95,778 ) 16.89 Outstanding and unvested shares at June 30, 2022 145,701 $ 22.82 As of June 30, 2022, $ 2.7 million of compensation cost related to unvested restricted shares awarded under our long-term incentive plan remains to be recognized over an expected weighted‑average period of 2.1 years.

Earnings per Share

Earnings per Share	6 Months Ended
Earnings per Share	Jun. 30, 2022
Earnings Per Share [Abstract]
Earnings per Share	Note 10. Earnings per Share We calculate earnings per Class A Share as we do not have any other participating securities. Substantially all of income tax expense is attributed to earnings of Class A Shares reflective of our organizational structure. Class B Units of the Partnership together with the equal number of Class B Shares of the Company are convertible to Class A Shares of the Company on a one -for-one basis. In addition, our restricted equity-based awards may have a dilutive effect on our earnings per share. Diluted earnings per Class A Share are calculated using the “treasury stock method” or “if-converted method,” whichever is more dilutive. Three Months Ended June 30, Six Months Ended June 30, (in millions, except per share amounts) 2022 2021 2022 2021 Net income $ 151.8 $ 162.0 $ 311.4 $ 321.6 Less: Net income attributable to noncontrolling interest 129.8 151.0 272.5 302.0 Net income attributable to Hess Midstream LP 22.0 11.0 38.9 19.6 Net income attributable to Hess Midstream LP Basic: $ 0.51 $ 0.44 $ 1.01 $ 0.89 Diluted: $ 0.50 $ 0.44 $ 0.99 $ 0.87 Weighted average Class A shares outstanding: Basic: 43.7 25.0 38.7 22.2 Diluted: 43.7 25.1 38.8 22.3 For the three and six months ended June 30, 2022 the weighted average number of Class A shares outstanding included 50,874 and 76,243 dilutive restricted shares, respectively, compared with 77,748 and 99,985 dilutive restricted shares for the three and six months ended June 30, 2021, respectively.

Concentration of Credit Risk

Concentration of Credit Risk	6 Months Ended
Concentration of Credit Risk	Jun. 30, 2022
Risks and Uncertainties [Abstract]
Concentration of Credit Risk	Note 11. Concentration of Credit Risk Hess represented approximately 100 % of our total revenues and accounts receivable for the three and six months ended June 30, 2022 and 2021.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
Commitments and Contingencies	Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 12. Commitments and Contingencies Environmental Contingencies The Company is subject to federal, state and local laws and regulations relating to the environment. As of June 30, 2022 our reserves for estimated remediation liabilities included in Accrued liabilities and Other noncurrent liabilities were $ 0.6 million and $ 4.5 million, respectively, compared with $ 0.8 million and $ 3.1 million, respectively, as of December 31, 2021. Legal Proceedings In the ordinary course of business, the Company is from time to time party to various judicial and administrative proceedings. We regularly assess the need for accounting recognition or disclosure of these contingencies. In the case of a known contingency, we accrue a liability when the loss is probable and the amount is reasonably estimable. If a range of amounts can be reasonably estimated and no amount within the range is a better estimate than any other amount, then the minimum of the range is accrued. As of June 30, 2022 and December 31, 2021, we did no t have material accrued liabilities for legal contingencies. Based on currently available information, we believe it is remote that the outcome of known matters would have a material adverse impact on our financial condition, results of operations or cash flows.

Segments

Segments	6 Months Ended
Segments	Jun. 30, 2022
Segment Reporting [Abstract]
Segments	Note 13. Segments Our operations are located in the United States and are organized into three reportable segments: (1) gathering, (2) processing and storage and (3) terminaling and export. Our reportable segments comprise the structure used by our Chief Operating Decision Maker (“CODM”) to make key operating decisions and assess performance. These segments are strategic business units with differing products and services. Our CODM evaluates the segments’ operating performance based on multiple measures including Adjusted EBITDA, defined as net income (loss) before net interest expense, income tax expense (benefit), depreciation and amortization and our proportional share of depreciation of equity affiliates, as further adjusted to eliminate the impact of certain items that we do not consider indicative of our ongoing operating performance, such as transaction costs, other income and other non-cash, non‑recurring items, if applicable. The following tables reflect certain financial data for each reportable segment: Gathering Processing and Storage Terminaling and Export Interest and Other Consolidated (in millions) For the Three Months Ended June 30, 2022 Revenues and other income $ 166.2 $ 116.5 $ 30.7 $ - $ 313.4 Net income (loss) 95.2 81.3 21.3 ( 46.0 ) 151.8 Net income (loss) attributable to 17.6 15.0 3.8 ( 14.4 ) 22.0 Depreciation expense 26.6 14.4 4.0 - 45.0 Proportional share of equity - 1.3 - - 1.3 Income from equity investments - 1.0 - - 1.0 Interest expense, net - - - 37.4 37.4 Income tax expense - - - 7.1 7.1 Adjusted EBITDA 121.8 97.0 25.3 ( 1.5 ) 242.6 Capital expenditures* 67.7 1.3 2.7 - 71.7 Gathering Processing and Storage Terminaling and Export Interest and Other Consolidated (in millions) For the Three Months Ended June 30, 2021 Revenues and other income $ 154.6 $ 105.3 $ 34.9 $ - $ 294.8 Net income (loss) 92.4 71.6 26.1 ( 28.1 ) 162.0 Net income (loss) attributable to 8.1 6.3 2.4 ( 5.8 ) 11.0 Depreciation expense 25.2 11.2 4.0 - 40.4 Proportional share of equity - 1.3 - - 1.3 Income from equity investments - 2.9 - - 2.9 Interest expense, net - - - 22.9 22.9 Income tax expense - - - 3.6 3.6 Adjusted EBITDA 117.6 84.1 30.1 ( 1.6 ) 230.2 Capital expenditures* 38.2 8.1 0.1 - 46.4 Gathering Processing and Storage Terminaling and Export Interest and Other Consolidated (in millions) For the Six Months Ended June 30, 2022 Revenues and other income $ 329.8 $ 230.3 $ 65.7 $ - $ 625.8 Net income (loss) 193.4 159.4 43.2 ( 84.6 ) 311.4 Net income (loss) attributable to 30.6 25.4 6.7 ( 23.8 ) 38.9 Depreciation expense 52.5 28.8 8.1 - 89.4 Proportional share of equity affiliates' depreciation - 2.6 - - 2.6 Income from equity investments - 1.4 - - 1.4 Interest expense, net - - - 68.7 68.7 Income tax expense - - - 12.1 12.1 Adjusted EBITDA 245.9 190.8 51.3 ( 3.8 ) 484.2 Capital expenditures* 103.4 2.2 3.2 - 108.8 Gathering Processing and Storage Terminaling and Export Interest and Other Consolidated (in millions) For the Six Months Ended June 30, 2021 Revenues and other income $ 307.3 $ 208.8 $ 67.5 $ - $ 583.6 Net income (loss) 184.8 142.5 50.1 ( 55.8 ) 321.6 Net income (loss) attributable to 14.5 11.1 4.0 ( 10.0 ) 19.6 Depreciation expense 50.1 22.4 8.1 - 80.6 Proportional share of equity affiliates' depreciation - 2.6 - - 2.6 Income from equity investments - 5.6 - - 5.6 Interest expense, net - - - 46.0 46.0 Income tax expense (benefit) - - - 6.1 6.1 Adjusted EBITDA 234.9 167.5 58.2 ( 3.7 ) 456.9 Capital expenditures* 57.6 11.8 0.1 - 69.5 * Includes acquisition, expansion and maintenance capital expenditures, as applicable. Total assets for the reportable segments are as follows: June 30, 2022 December 31, 2021 (in millions) Gathering $ 1,988.0 $ 1,927.0 Processing and Storage (1) 1,133.1 1,149.5 Terminaling and Export 277.1 281.4 Interest and Other 200.5 127.7 Total assets $ 3,598.7 $ 3,485.6 (1) Includes investment in equity investees of $ 96.9 million as of June 30, 2022 and $ 101.6 million as of December 31, 2021.

Subsequent Events

Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2022
Subsequent Events [Abstract]
Subsequent Events	Note 14. Subsequent Events On July 14, 2022, the Partnership amended and restated its existing credit agreement for its $ 1.4 billion Credit Facilities. The amended and restated credit agreement, among other things, (a) extended the maturity date from December 2024 to July 2027 , (b) increased the accordion feature to up to an additional $ 750.0 million, which does not represent a lending commitment from the lenders, and (c) replaced the London Interbank Offered Rate, or LIBOR, with Secured Overnight Financing Rate, or SOFR, as the benchmark rate. In connection with the amendment and restatement of the credit facilities, the Partnership retired its existing senior secured Term Loan A facility, which had borrowings of $ 380.0 million excluding deferred issuance costs at June 30, 2022, and entered into a fully drawn $ 400.0 million 5 -year Term Loan A facility, receiving cash of $ 20.0 million at closing. As a result of this refinance, $ 25.0 million of current maturities of long-term debt have been reclassified to long-term debt as of June 30, 2022. The amended and restated credit agreement has substantially similar terms to the prior agreement, including commitment amounts, guarantees, secured collateral and covenants. On July 25, 2022, the board of directors of our general partner declared a quarterly cash distribution of $ 0.5559 per Class A share for the quarter ended June 30, 2022, an approximate 1.2 % increase compared to the distribution on the Class A shares for the quarter ended March 31, 2022. The distribution will be payable on August 12, 2022, to shareholders of record as of the close of business on August 4, 2022. Simultaneously, the Partnership will make a distribution of $ 0.5559 per Class B unit of the Partnership to the Sponsors.

Basis of Presentation (Policies

Basis of Presentation (Policies)	6 Months Ended
Basis of Presentation (Policies)	Jun. 30, 2022
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, 2022 and December 31, 2021, the consolidated results of operations for the three and six months ended June 30, 2022 and 2021, and the consolidated cash flows for the six months ended June 30, 2022 and 2021. 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, 2021. We consolidate the activities of Hess Midstream Operations LP (“the Partnership”), as a variable interest entity (“VIE”) under U.S. 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 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 13, Segments ). We currently do not have any independent assets or operations other than our interest in the Partnership. Our noncontrolling interest represents the approximate 81.7 % interest in the Partnership retained by Hess and GIP at June 30, 2022 ( 86.7 % at December 31, 2021). See Note 3, Equity Transactions for a description of changes in noncontrolling interest related to the equity transactions.

Related Party Transactions (Tab

Related Party Transactions (Tables)	6 Months Ended
Related Party Transactions (Tables)	Jun. 30, 2022
Related Party Transactions [Abstract]
Summary of Revenues From Contracts With Customers on Disaggregated Basis	Revenues from contracts with customers on a disaggregated basis are as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in millions) Oil and gas gathering services $ 148.4 $ 133.4 $ 293.7 $ 262.1 Processing and storage services 116.5 105.3 230.3 208.8 Terminaling and export services 30.3 34.9 65.0 67.5 Water gathering and disposal services 17.8 21.2 36.1 45.2 Total revenues from contracts with customers $ 313.0 $ 294.8 $ 625.1 $ 583.6 Other income 0.4 - 0.7 - Total revenues $ 313.4 $ 294.8 $ 625.8 $ 583.6
Summary of MVC Shortfall Fees Earned	The following table presents MVC shortfall fees earned during each period: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in millions) Oil and gas gathering services $ 30.5 $ 9.4 $ 51.8 $ 16.9 Processing and storage services 16.5 - 22.8 - Terminaling and export services 10.3 7.7 16.6 12.7 Water gathering and disposal services 0.4 1.6 0.4 2.5 Total $ 57.7 $ 18.7 $ 91.6 $ 32.1
Summary of Third-party Pass-through Costs for Which Revenues in Amount Equal to Costs are Recognized and Classification of Charges between Operating and Maintenance Expenses and General and Administrative Expenses	The following table presents third-party pass-through costs for which we recognize revenues in an amount equal to the costs. These third-party costs are included in Operating and maintenance expenses in the accompanying unaudited consolidated statements of operations. Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in millions) Electricity and other related fees $ 12.0 $ 9.9 $ 22.5 $ 19.2 Produced water trucking and disposal costs 7.9 8.7 15.8 18.1 Rail transportation costs - - 4.3 0.1 Total $ 19.9 $ 18.6 $ 42.6 $ 37.4 For the three and six months ended June 30, 2022 and 2021, we had the following charges from Hess. The classification of these charges between operating and maintenance expenses and general and administrative expenses is based on the fundamental nature of the services being performed for our operations. Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in millions) Operating and maintenance expenses $ 16.7 $ 15.8 $ 33.6 $ 31.5 General and administrative expenses 3.8 3.6 7.5 7.8 Total $ 20.5 $ 19.4 $ 41.1 $ 39.3
Summary of Activity Related to Agreements with Related Party	For the three and six months ended June 30, 2022 and 2021, we had the following activity related to our agreements with LM4: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in millions) Processing fee incurred $ 4.7 $ 7.1 $ 9.2 $ 14.0 Earnings from equity investments 1.0 2.9 1.4 5.6 Distributions received from equity investments 1.4 4.0 6.1 11.5

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	6 Months Ended
Property, Plant and Equipment (Tables)	Jun. 30, 2022
Property, Plant and Equipment [Abstract]
Components of Property, Plant and Equipment	Property, plant and equipment, at cost, is as follows: Estimated useful lives June 30, 2022 December 31, 2021 (in millions, except for number of years) Gathering assets Pipelines 22 years $ 1,526.0 $ 1,489.7 Compressors, pumping stations and terminals 22 to 25 years 859.8 809.0 Gas plant assets Pipelines, pipes and valves 22 to 25 years 460.0 460.0 Equipment 12 to 30 years 428.2 428.3 Processing and fractionation facilities 25 years 413.2 408.7 Buildings 35 years 182.3 182.3 Logistics facilities and railcars 20 to 25 years 386.7 386.5 Storage facilities 20 to 25 years 19.5 19.5 Other 20 to 25 years 25.8 25.8 Construction-in-progress N/A 148.7 131.6 Total property, plant and equipment, at cost 4,450.2 4,341.4 Accumulated depreciation ( 1,305.6 ) ( 1,216.4 ) Property, plant and equipment, net $ 3,144.6 $ 3,125.0

Accrued Liabilities (Tables)

Accrued Liabilities (Tables)	6 Months Ended
Accrued Liabilities (Tables)	Jun. 30, 2022
Accrued Liabilities, Current [Abstract]
Schedule of Accrued Liabilities	Accrued liabilities are as follows: June 30, 2022 December 31, 2021 (in millions) Accrued interest $ 35.1 $ 30.9 Accrued capital expenditures 28.0 26.5 Other accruals 22.0 18.8 Total $ 85.1 $ 76.2

Partners' Capital and Distrib_2

Partners' Capital and Distributions (Tables)	6 Months Ended
Partners' Capital and Distributions (Tables)	Jun. 30, 2022
Partners' Capital Notes [Abstract]
Schedule of Distributions Declared and Paid	The following table details the distributions declared and/or paid for the periods presented: z Period Record Date Distribution Date Distribution per Class A share First Quarter 2021 May 3, 2021 May 13, 2021 $ 0.4526 Second Quarter 2021 August 9, 2021 August 13, 2021 $ 0.5042 Third Quarter 2021 November 4, 2021 November 12, 2021 $ 0.5104 Fourth Quarter 2021 February 3, 2022 February 14, 2022 $ 0.5167 First Quarter 2022 May 5, 2022 May 13, 2022 $ 0.5492 Second Quarter 2022 (1) August 4, 2022 August 12, 2022 $ 0.5559 (1) For more information, see Note 14, Subsequent Events.

Equity-Based Compensation (Tabl

Equity-Based Compensation (Tables)	6 Months Ended
Equity-Based Compensation (Tables)	Jun. 30, 2022
Share-based Payment Arrangement [Abstract]
Schedule of Equity-based Award Activity	Equity‑based award activity for the six months ended June 30, 2022 is as follows: Weighted Average Award Date Number of Shares Fair Value Outstanding and unvested shares at December 31, 2021 187,931 $ 16.75 Granted 53,548 33.52 Vested ( 95,778 ) 16.89 Outstanding and unvested shares at June 30, 2022 145,701 $ 22.82

Earnings per Share (Tables)

Earnings per Share (Tables)	6 Months Ended
Earnings per Share (Tables)	Jun. 30, 2022
Earnings Per Share [Abstract]
Schedule of Earnings per Share	We calculate earnings per Class A Share as we do not have any other participating securities. Substantially all of income tax expense is attributed to earnings of Class A Shares reflective of our organizational structure. Class B Units of the Partnership together with the equal number of Class B Shares of the Company are convertible to Class A Shares of the Company on a one -for-one basis. In addition, our restricted equity-based awards may have a dilutive effect on our earnings per share. Diluted earnings per Class A Share are calculated using the “treasury stock method” or “if-converted method,” whichever is more dilutive. Three Months Ended June 30, Six Months Ended June 30, (in millions, except per share amounts) 2022 2021 2022 2021 Net income $ 151.8 $ 162.0 $ 311.4 $ 321.6 Less: Net income attributable to noncontrolling interest 129.8 151.0 272.5 302.0 Net income attributable to Hess Midstream LP 22.0 11.0 38.9 19.6 Net income attributable to Hess Midstream LP Basic: $ 0.51 $ 0.44 $ 1.01 $ 0.89 Diluted: $ 0.50 $ 0.44 $ 0.99 $ 0.87 Weighted average Class A shares outstanding: Basic: 43.7 25.0 38.7 22.2 Diluted: 43.7 25.1 38.8 22.3

Segments (Tables)

Segments (Tables)	6 Months Ended
Segments (Tables)	Jun. 30, 2022
Segment Reporting [Abstract]
Financial Data for Each Reportable Segment	The following tables reflect certain financial data for each reportable segment: Gathering Processing and Storage Terminaling and Export Interest and Other Consolidated (in millions) For the Three Months Ended June 30, 2022 Revenues and other income $ 166.2 $ 116.5 $ 30.7 $ - $ 313.4 Net income (loss) 95.2 81.3 21.3 ( 46.0 ) 151.8 Net income (loss) attributable to 17.6 15.0 3.8 ( 14.4 ) 22.0 Depreciation expense 26.6 14.4 4.0 - 45.0 Proportional share of equity - 1.3 - - 1.3 Income from equity investments - 1.0 - - 1.0 Interest expense, net - - - 37.4 37.4 Income tax expense - - - 7.1 7.1 Adjusted EBITDA 121.8 97.0 25.3 ( 1.5 ) 242.6 Capital expenditures* 67.7 1.3 2.7 - 71.7 Gathering Processing and Storage Terminaling and Export Interest and Other Consolidated (in millions) For the Three Months Ended June 30, 2021 Revenues and other income $ 154.6 $ 105.3 $ 34.9 $ - $ 294.8 Net income (loss) 92.4 71.6 26.1 ( 28.1 ) 162.0 Net income (loss) attributable to 8.1 6.3 2.4 ( 5.8 ) 11.0 Depreciation expense 25.2 11.2 4.0 - 40.4 Proportional share of equity - 1.3 - - 1.3 Income from equity investments - 2.9 - - 2.9 Interest expense, net - - - 22.9 22.9 Income tax expense - - - 3.6 3.6 Adjusted EBITDA 117.6 84.1 30.1 ( 1.6 ) 230.2 Capital expenditures* 38.2 8.1 0.1 - 46.4 Gathering Processing and Storage Terminaling and Export Interest and Other Consolidated (in millions) For the Six Months Ended June 30, 2022 Revenues and other income $ 329.8 $ 230.3 $ 65.7 $ - $ 625.8 Net income (loss) 193.4 159.4 43.2 ( 84.6 ) 311.4 Net income (loss) attributable to 30.6 25.4 6.7 ( 23.8 ) 38.9 Depreciation expense 52.5 28.8 8.1 - 89.4 Proportional share of equity affiliates' depreciation - 2.6 - - 2.6 Income from equity investments - 1.4 - - 1.4 Interest expense, net - - - 68.7 68.7 Income tax expense - - - 12.1 12.1 Adjusted EBITDA 245.9 190.8 51.3 ( 3.8 ) 484.2 Capital expenditures* 103.4 2.2 3.2 - 108.8 Gathering Processing and Storage Terminaling and Export Interest and Other Consolidated (in millions) For the Six Months Ended June 30, 2021 Revenues and other income $ 307.3 $ 208.8 $ 67.5 $ - $ 583.6 Net income (loss) 184.8 142.5 50.1 ( 55.8 ) 321.6 Net income (loss) attributable to 14.5 11.1 4.0 ( 10.0 ) 19.6 Depreciation expense 50.1 22.4 8.1 - 80.6 Proportional share of equity affiliates' depreciation - 2.6 - - 2.6 Income from equity investments - 5.6 - - 5.6 Interest expense, net - - - 46.0 46.0 Income tax expense (benefit) - - - 6.1 6.1 Adjusted EBITDA 234.9 167.5 58.2 ( 3.7 ) 456.9 Capital expenditures* 57.6 11.8 0.1 - 69.5 * Includes acquisition, expansion and maintenance capital expenditures, as applicable.
Total Assets for Reportable Segments	Total assets for the reportable segments are as follows: June 30, 2022 December 31, 2021 (in millions) Gathering $ 1,988.0 $ 1,927.0 Processing and Storage (1) 1,133.1 1,149.5 Terminaling and Export 277.1 281.4 Interest and Other 200.5 127.7 Total assets $ 3,598.7 $ 3,485.6 (1) Includes investment in equity investees of $ 96.9 million as of June 30, 2022 and $ 101.6 million as of December 31, 2021.

Description of Business - Addit

Description of Business - Additional Information (Detail)	6 Months Ended
Description of Business - Additional Information (Detail)	Jun. 30, 2022 Segment
Description Of Business [Line Items]
Number of reportable segments	3
Hess
Description Of Business [Line Items]
Percentage of ownership in joint venture	50%
GIP II Blue Holding, L.P
Description Of Business [Line Items]
Percentage of ownership in joint venture	50%

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Detail)	6 Months Ended	12 Months Ended
Basis of Presentation - Additional Information (Detail)	Jun. 30, 2022	Dec. 31, 2021
Hess and GIP
Accounting Policies [Line Items]
Noncontrolling interest percentage	81.70%	86.70%

Equity Transactions - Additiona

Equity Transactions - Additional Information (Detail) - USD ($)				6 Months Ended
	Apr. 04, 2022	Mar. 29, 2022	Mar. 15, 2021	Jun. 30, 2022	Apr. 08, 2022	Dec. 31, 2021	Jun. 30, 2021
Class of Stock [Line Items]
Costs incurred to repurchase shares were charged to equity				$ 1,500,000
5.500% Fixed Rate Senior Unsecured Notes due 2030
Class of Stock [Line Items]
Fixed-rate senior notes					$ 400,000,000
Class A Shares
Class of Stock [Line Items]
Equity offering transaction	10,235,000		6,900,000
Shares issued, price per share	$ 29.50		$ 21
Proceeds from Issuance of public equity offering	$ 0
Net proceeds received by sponsors from public equity offering	291,700,000		$ 139,900,000
Increase (decrease) common unitholders	$ 27,000,000		$ (31,800,000)	248,700,000		$ 204,100,000
Additions to deferred tax asset				$ 86,400,000			$ 26,400,000
Class A Shares \| Maximum
Class of Stock [Line Items]
Underwriters’ option to purchase additional shares	1,335,000		900,000
Class B Shares
Class of Stock [Line Items]
Repurchase of shares	13,559,322
Value of shares repurchased		$ 400,000,000
Stock purchased price per share	$ 29.50

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
LM4
Related Party Transaction [Line Items]
Percentage of ownership in joint venture	50%		50%
Customer Concentration Risk \| Revenue
Related Party Transaction [Line Items]
Revenues attributable to fee based commercial agreements			100%	100%
Hess
Related Party Transaction [Line Items]
Percentage of ownership in joint venture	50%		50%
Hess \| Customer Concentration Risk \| Revenue
Related Party Transaction [Line Items]
Revenues attributable to fee based commercial agreements	100%	100%	100%	100%
Hess \| Amended and Restated Commercial Agreement
Related Party Transaction [Line Items]
Minimum volume commitments, Description			Minimum volume commitments (“MVCs”) are equal to 80% of Hess’ nominations in each development plan that apply on a three-year rolling basis such that MVCs are set for the three years following the most recent nomination. Without our consent, the MVCs resulting from the nominated volumes for any quarter or year contained in any prior development plan shall not be reduced by any updated development plan unless dedicated production is released by us. The applicable MVCs may, however, be increased as a result of the nominations contained in any such updated development plan.
Minimum volume commitments expressed as percentage of related party nominations in development plans			80%
Initial term of agreement			10 years
Agreement description			each of our commercial agreements with Hess has an initial 10-year term effective January 1, 2014 (“Initial Term”).
Number of rights to extend the term of agreement			one
Advance period to call for extension of term of agreement			3 years
Secondary term of agreement			10 years
Hess \| Amended and Restated Agreement for Certain Gas Gathering Sub-system
Related Party Transaction [Line Items]
Initial term of agreement			15 years
Agreement description			For this gathering sub-system, the Initial Term is 15 years effective January 1, 2014 and for the water services agreements the Initial Term is 14 years effective January 1, 2019.
Secondary term of agreement			5 years
Hess \| Amended and Restated Water Services Agreements
Related Party Transaction [Line Items]
Initial term of agreement			14 years
Secondary term of agreement			10 years
Hess \| Terminal and Export Services Agreement
Related Party Transaction [Line Items]
Commercial agreement period			20 years
Hess \| Commercial Agreements Other Than Storage Services Agreement and Terminal and Export Services Agreement
Related Party Transaction [Line Items]
Minimum volume commitments, Description			During the Secondary Term of our commercial agreements, Hess will continue to have MVCs equal to 80% of Hess’ nominations in each development plan that apply on a three-year rolling basis through the Secondary Term.
Minimum volume commitments expressed as percentage of related party nominations in development plans			80%
Maximum consumer price index percentage			3%
Fee recalculation model description			the fee recalculation model under each applicable agreement will be replaced by an inflation-based fee structure. The initial fee for the first year of the Secondary Term will be determined based on the average fees paid by Hess under the applicable agreement during the last three years of the Initial Term (with such fees adjusted for inflation through the first year of the Secondary Term). For each year following the first year of the Secondary Term, the applicable fee will be adjusted annually based on the percentage change in the consumer price index, provided that we may not increase any fee by more than 3% in any calendar year solely by reason of an increase in the consumer price index, and no fee will ever be reduced below the amount of the applicable fee payable by Hess in the prior year as a result of a decrease in the consumer price index.
Targa Resources Corp. \| LM4
Related Party Transaction [Line Items]
Percentage of ownership in joint venture	50%		50%

Related Party Transactions - Su

Related Party Transactions - Summary of Revenues From Contracts With Customers on Disaggregated Basis (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer including assessed tax	$ 313	$ 294.8	$ 625.1	$ 583.6
Other income	0.4		0.7
Total revenues	313.4	294.8	625.8	583.6
Oil and Gas Gathering Services
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer including assessed tax	148.4	133.4	293.7	262.1
Processing and Storage Services
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer including assessed tax	116.5	105.3	230.3	208.8
Terminaling and Export Services
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer including assessed tax	30.3	34.9	65	67.5
Water Gathering and Disposal Services
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer including assessed tax	$ 17.8	$ 21.2	$ 36.1	$ 45.2

Related Party Transactions - _2

Related Party Transactions - Summary of MVC Shortfall Fees Earned (Detail) - Hess - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Related Party Transaction [Line Items]
Total MVC shortfall fees	$ 57.7	$ 18.7	$ 91.6	$ 32.1
Oil and Gas Gathering Services
Related Party Transaction [Line Items]
Total MVC shortfall fees	30.5	9.4	51.8	16.9
Processing and Storage Services
Related Party Transaction [Line Items]
Total MVC shortfall fees	16.5		22.8
Terminaling and Export Services
Related Party Transaction [Line Items]
Total MVC shortfall fees	10.3	7.7	16.6	12.7
Water Gathering and Disposal Services
Related Party Transaction [Line Items]
Total MVC shortfall fees	$ 0.4	$ 1.6	$ 0.4	$ 2.5

Related Party Transactions - _3

Related Party Transactions - Summary of Third-party Pass-through Costs for Which Revenues in Amount Equal to Costs are Recognized (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Related Party Transaction [Line Items]
Reimbursement revenue	$ 313	$ 294.8	$ 625.1	$ 583.6
Hess
Related Party Transaction [Line Items]
Total	19.9	18.6	42.6	37.4
Hess \| Electricity and Other Related Fees
Related Party Transaction [Line Items]
Reimbursement revenue	12	9.9	22.5	19.2
Hess \| Produced Water Trucking and Disposal Costs
Related Party Transaction [Line Items]
Reimbursement revenue	$ 7.9	$ 8.7	15.8	18.1
Hess \| Rail Transportation Costs
Related Party Transaction [Line Items]
Reimbursement revenue			$ 4.3	$ 0.1

Related Party Transactions - _4

Related Party Transactions - Summary of Classification of Charges between Operating and Maintenance Expenses and General and Administrative Expenses (Detail) - Hess - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Related Party Transaction [Line Items]
Operating and maintenance expenses	$ 16.7	$ 15.8	$ 33.6	$ 31.5
General and administrative expenses	3.8	3.6	7.5	7.8
Total	$ 20.5	$ 19.4	$ 41.1	$ 39.3

Related Party Transactions - _5

Related Party Transactions - Summary of Activity Related to Agreements with Related Party (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Related Party Transaction [Line Items]
Earnings from equity investments	$ 1	$ 2.9	$ 1.4	$ 5.6
Distributions received from equity investments			6.1	11.5
LM4
Related Party Transaction [Line Items]
Processing fee incurred	4.7	7.1	9.2	14
Earnings from equity investments	1	2.9	1.4	5.6
Distributions received from equity investments	$ 1.4	$ 4	$ 6.1	$ 11.5

Property, Plant and Equipment -

Property, Plant and Equipment - Components of Property, Plant and Equipment (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Property Plant And Equipment [Line Items]
Total property, plant and equipment, at cost	$ 4,450.2	$ 4,341.4
Accumulated depreciation	(1,305.6)	(1,216.4)
Property, plant and equipment, net	3,144.6	3,125
Logistics Facilities and Railcars
Property Plant And Equipment [Line Items]
Total property, plant and equipment, at cost	$ 386.7	386.5
Logistics Facilities and Railcars \| Minimum
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	20 years
Logistics Facilities and Railcars \| Maximum
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	25 years
Storage Facilities
Property Plant And Equipment [Line Items]
Total property, plant and equipment, at cost	$ 19.5	19.5
Storage Facilities \| Minimum
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	20 years
Storage Facilities \| Maximum
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	25 years
Other
Property Plant And Equipment [Line Items]
Total property, plant and equipment, at cost	$ 25.8	25.8
Other \| Minimum
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	20 years
Other \| Maximum
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	25 years
Construction-In-Progress
Property Plant And Equipment [Line Items]
Total property, plant and equipment, at cost	$ 148.7	131.6
Gathering Assets \| Pipelines
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	22 years
Total property, plant and equipment, at cost	$ 1,526	1,489.7
Gathering Assets \| Compressors, Pumping Stations and Terminals
Property Plant And Equipment [Line Items]
Total property, plant and equipment, at cost	$ 859.8	809
Gathering Assets \| Compressors, Pumping Stations and Terminals \| Minimum
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	22 years
Gathering Assets \| Compressors, Pumping Stations and Terminals \| Maximum
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	25 years
Gas Plant Assets \| Pipelines, Pipes and Valves
Property Plant And Equipment [Line Items]
Total property, plant and equipment, at cost	$ 460	460
Gas Plant Assets \| Pipelines, Pipes and Valves \| Minimum
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	22 years
Gas Plant Assets \| Pipelines, Pipes and Valves \| Maximum
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	25 years
Gas Plant Assets \| Equipment
Property Plant And Equipment [Line Items]
Total property, plant and equipment, at cost	$ 428.2	428.3
Gas Plant Assets \| Equipment \| Minimum
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	12 years
Gas Plant Assets \| Equipment \| Maximum
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	30 years
Gas Plant Assets \| Processing and Fractionation Facilities
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	25 years
Total property, plant and equipment, at cost	$ 413.2	408.7
Gas Plant Assets \| Buildings
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	35 years
Total property, plant and equipment, at cost	$ 182.3	$ 182.3

Accrued Liabilities - Schedule

Accrued Liabilities - Schedule of Accrued Liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Accrued Liabilities, Current [Abstract]
Accrued interest	$ 35.1	$ 30.9
Accrued capital expenditures	28	26.5
Other accruals	22	18.8
Total	$ 85.1	$ 76.2

Debt and Interest Expense - Add

Debt and Interest Expense - Additional Information (Detail) - USD ($)		6 Months Ended
	Apr. 08, 2022	Jun. 30, 2022
Debt Instrument [Line Items]
Debt covenant, leverage ratio		550%
Ratio of debt to EBITDA		500%
Secured leverage ratio - Maximum		400%
Debt instrument covenant, description		The Credit Facilities contain representations and warranties, affirmative and negative covenants and events of default that the Partnership considers to be customary for an agreement of this type, including a covenant that requires the Partnership to maintain a ratio of total debt to EBITDA (as defined in the Credit Facilities) for the prior four fiscal quarters of not greater than 5.00 to 1.00 as of the last day of each fiscal quarter (5.50 to 1.00 during the specified period following certain acquisitions) and, prior to the Partnership obtaining an investment grade credit rating, a ratio of secured debt to EBITDA for the prior four fiscal quarters of not greater than 4.00 to 1.00 as of the last day of each fiscal quarter.
Carrying Value
Debt Instrument [Line Items]
Total debt		$ 2,937,400,000
Level 2
Debt Instrument [Line Items]
Total debt fair value		$ 2,691,700,000
Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility - Term		5 years
Maximum borrowing capacity		$ 1,000,000,000
Borrowings		$ 91,000,000
Revolving Credit Facility \| Minimum
Debt Instrument [Line Items]
Interest rate applicable margin		1.55%
Revolving Credit Facility \| Maximum
Debt Instrument [Line Items]
Interest rate applicable margin		2.50%
Term Loan A Facility
Debt Instrument [Line Items]
Credit facility - Term		5 years
Credit facility - maturity year		2024
Maximum borrowing capacity		$ 400,000,000
Borrowings		$ 380,000,000
Syndicated Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility - Term		5 years
Syndicated Revolving Credit Facility \| Minimum
Debt Instrument [Line Items]
Interest rate applicable margin		1.275%
Syndicated Revolving Credit Facility \| Maximum
Debt Instrument [Line Items]
Interest rate applicable margin		2%
Fixed-Rate Senior Notes
Debt Instrument [Line Items]
Debt covenant, leverage ratio		425%
5.500% Fixed Rate Senior Unsecured Notes due 2030
Debt Instrument [Line Items]
Aggregate principal amount of fixed-rate senior notes	$ 400,000,000
5.500% Fixed Rate Senior Unsecured Notes due 2030 \| Fixed-Rate Senior Unsecured Notes
Debt Instrument [Line Items]
Debt instrument interest rate	5.50%
Debt instrument due year	2030
Frequency of periodic interest payment		semi‑annually
Interest payment terms		Interest is payable semi‑annually on April 15 and October 15, commencing October 15, 2022.
4.250% Fixed Rate Senior Unsecured Notes due 2030
Debt Instrument [Line Items]
Aggregate principal amount of fixed-rate senior notes		$ 750,000,000
4.250% Fixed Rate Senior Unsecured Notes due 2030 \| Fixed-Rate Senior Notes
Debt Instrument [Line Items]
Debt instrument interest rate		4.25%
Debt instrument due year		2030
Frequency of periodic interest payment		semi‑annually
Interest payment terms		Interest is payable semi‑annually on February 15 and August 15.
5.625% Fixed Rate Senior Unsecured Notes due 2026
Debt Instrument [Line Items]
Aggregate principal amount of fixed-rate senior notes		$ 800,000,000
5.625% Fixed Rate Senior Unsecured Notes due 2026 \| Fixed-Rate Senior Notes
Debt Instrument [Line Items]
Debt instrument interest rate		5.625%
Debt instrument due year		2026
Frequency of periodic interest payment		semi‑annually
Interest payment terms		Interest is payable semi‑annually on February 15 and August 15.
5.125% Fixed Rate Senior Unsecured Notes due 2028
Debt Instrument [Line Items]
Aggregate principal amount of fixed-rate senior notes		$ 550,000,000
5.125% Fixed Rate Senior Unsecured Notes due 2028 \| Fixed-Rate Senior Notes
Debt Instrument [Line Items]
Debt instrument interest rate		5.125%
Debt instrument due year		2028
Frequency of periodic interest payment		semi‑annually
Interest payment terms		Interest is payable semi‑annually on June 15 and December 15.

Partners' Capital and Distrib_3

Partners' Capital and Distributions - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2022
Partners' Capital Notes [Abstract]
Period of cash distribution to shareholders	45 days

Partners' Capital and Distrib_4

Partners' Capital and Distributions - Schedule of Distributions Declared and Paid (Detail)	6 Months Ended
	Jun. 30, 2022 $ / shares
First Quarter 2021
Distribution Made To Limited Partner [Line Items]
Record Date	May 03, 2021
Distribution Date	May 13, 2021
Distribution per Class A share	$ 0.4526
Second Quarter 2021
Distribution Made To Limited Partner [Line Items]
Record Date	Aug. 09, 2021
Distribution Date	Aug. 13, 2021
Distribution per Class A share	$ 0.5042
Third Quarter 2021
Distribution Made To Limited Partner [Line Items]
Record Date	Nov. 04, 2021
Distribution Date	Nov. 12, 2021
Distribution per Class A share	$ 0.5104
Fourth Quarter 2021
Distribution Made To Limited Partner [Line Items]
Record Date	Feb. 03, 2022
Distribution Date	Feb. 14, 2022
Distribution per Class A share	$ 0.5167
First Quarter 2022
Distribution Made To Limited Partner [Line Items]
Record Date	May 05, 2022
Distribution Date	May 13, 2022
Distribution per Class A share	$ 0.5492
Second Quarter 2022
Distribution Made To Limited Partner [Line Items]
Record Date	Aug. 04, 2022	[1]
Distribution Date	Aug. 12, 2022	[1]
Distribution per Class A share	$ 0.5559	[1]

[1] For more information, see Note 14, Subsequent Events.

Equity-Based Compensation - Sch

Equity-Based Compensation - Schedule of Equity-based Award Activity (Detail) - Restricted Share	6 Months Ended
	Jun. 30, 2022 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding and unvested shares at December 31, 2021, Number of Shares \| shares	187,931
Granted, Number of Shares \| shares	53,548
Vested, Number of Shares \| shares	(95,778)
Outstanding and unvested shares at March 31, 2022, Number of Shares \| shares	145,701
Outstanding and unvested shares at December 31, 2021, Weighted Average Award Date Fair Value \| $ / shares	$ 16.75
Granted, Weighted Average Award Date Fair Value \| $ / shares	33.52
Vested, Weighted Average Award Date Fair Value \| $ / shares	16.89
Outstanding and unvested shares at March 31, 2022, Weighted Average Award Date Fair Value \| $ / shares	$ 22.82

Equity-Based Compensation - Add

Equity-Based Compensation - Additional Information (Detail) - 2017 Long-Term Incentive Plan $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Cost related to restricted shares to be recognized	$ 2.7
Cost related to unvested restricted shares to be recognized, over an expected weighted-average period	2 years 1 month 6 days

Earnings per Share - Additional

Earnings per Share - Additional Information (Detail) - Class A Shares - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Dilutive Restricted Shares
Limited Partners Capital Account [Line Items]
Weighted average number shares	50,874	77,748	76,243	99,985
Hess and GIP
Limited Partners Capital Account [Line Items]
Conversion of Class B units and Class B shares into Class A shares			100%

Earnings per Share - Schedule o

Earnings per Share - Schedule of Earnings per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Limited Partners Capital Account [Line Items]
Net income	$ 151.8	$ 159.6	$ 162	$ 159.6	$ 311.4	$ 321.6
Less: Net income attributable to noncontrolling interest	129.8		151		272.5	302
Net income attributable to Hess Midstream LP	$ 22		$ 11		$ 38.9	$ 19.6
Class A Shares
Net income attributable to Hess Midstream LP per Class A share:
Net income attributable to Hess Midstream LP per Class A share, Basic	$ 0.51		$ 0.44		$ 1.01	$ 0.89
Net income attributable to Hess Midstream LP per Class A share, Diluted	$ 0.50		$ 0.44		$ 0.99	$ 0.87
Weighted average Class A shares outstanding
Weighted average Class A shares outstanding, Basic	43.7		25		38.7	22.2
Weighted average Class A shares outstanding, Diluted	43.7		25.1		38.8	22.3

Concentration of Credit Risk -

Concentration of Credit Risk - Additional Information (Detail) - Customer Concentration Risk	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Accounts Receivable
Concentration Risk [Line Items]
Concentration risk, percentage	100%	100%
Revenue
Concentration Risk [Line Items]
Concentration risk, percentage	100%	100%

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Estimated remediation liabilities included in accrued liabilities	$ 600,000	$ 800,000
Estimated remediation liabilities included in other noncurrent liabilities	4,500,000	3,100,000
Accrued liabilities for legal contingencies	$ 0	$ 0

Segments - Additional Informati

Segments - Additional Information (Detail)	6 Months Ended
Segments - Additional Information (Detail)	Jun. 30, 2022 Segment
Segment Reporting [Abstract]
Number of reportable segments	3

Segments - Financial Data for E

Segments - Financial Data for Each Reportable Segment (Detail) - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Information [Line Items]
Revenues and other income		$ 313.4		$ 294.8		$ 625.8	$ 583.6
Net income (loss)		151.8	$ 159.6	162	$ 159.6	311.4	321.6
Net income (loss) attributable to Hess Midstream LP		22		11		38.9	19.6
Depreciation expense		45		40.4		89.4	80.6
Proportional share of equity affiliates' depreciation		1.3		1.3		2.6	2.6
Income from equity investments		1		2.9		1.4	5.6
Interest expense, net		37.4		22.9		68.7	46
Income tax expense (benefit)		7.1		3.6		12.1	6.1
Adjusted EBITDA		242.6		230.2		484.2	456.9
Capital expenditures	[1]	71.7		46.4		108.8	69.5
Interest and Other
Segment Reporting Information [Line Items]
Net income (loss)		(46)		(28.1)		(84.6)	(55.8)
Net income (loss) attributable to Hess Midstream LP		(14.4)		(5.8)		(23.8)	(10)
Interest expense, net		37.4		22.9		68.7	46
Income tax expense (benefit)		7.1		3.6		12.1	6.1
Adjusted EBITDA		(1.5)		(1.6)		(3.8)	(3.7)
Gathering Opco \| Operating Segments
Segment Reporting Information [Line Items]
Revenues and other income		166.2		154.6		329.8	307.3
Net income (loss)		95.2		92.4		193.4	184.8
Net income (loss) attributable to Hess Midstream LP		17.6		8.1		30.6	14.5
Depreciation expense		26.6		25.2		52.5	50.1
Adjusted EBITDA		(121.8)		117.6		245.9	234.9
Capital expenditures	[1]	67.7		38.2		103.4	57.6
Processing and Storage \| Operating Segments
Segment Reporting Information [Line Items]
Revenues and other income		116.5		105.3		230.3	208.8
Net income (loss)		81.3		71.6		159.4	142.5
Net income (loss) attributable to Hess Midstream LP		15		6.3		25.4	11.1
Depreciation expense		14.4		11.2		28.8	22.4
Proportional share of equity affiliates' depreciation		1.3		1.3		2.6	2.6
Income from equity investments		1		2.9		1.4	5.6
Adjusted EBITDA		97		84.1		190.8	167.5
Capital expenditures	[1]	1.3		8.1		2.2	11.8
Terminaling and Export \| Operating Segments
Segment Reporting Information [Line Items]
Revenues and other income		30.7		34.9		65.7	67.5
Net income (loss)		21.3		26.1		43.2	50.1
Net income (loss) attributable to Hess Midstream LP		3.8		2.4		6.7	4
Depreciation expense		4		4		8.1	8.1
Adjusted EBITDA		25.3		30.1		51.3	58.2
Capital expenditures	[1]	$ 2.7		$ 0.1		$ 3.2	$ 0.1

[1] Includes acquisition, expansion and maintenance capital expenditures, as applicable.

Segments - Total Assets for Rep

Segments - Total Assets for Reportable Segments (Detail) - USD ($) $ in Millions		Jun. 30, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Total assets		$ 3,598.7	$ 3,485.6
Interest and Other
Segment Reporting Information [Line Items]
Total assets		200.5	127.7
Gathering Opco \| Operating Segments
Segment Reporting Information [Line Items]
Total assets		1,988	1,927
Processing and Storage \| Operating Segments
Segment Reporting Information [Line Items]
Total assets	[1]	1,133.1	1,149.5
Terminaling and Export \| Operating Segments
Segment Reporting Information [Line Items]
Total assets		$ 277.1	$ 281.4

[1] Includes investment in equity investees of $ 96.9 million as of June 30, 2022 and $ 101.6 million as of December 31, 2021.

Segments - Total Assets for R_2

Segments - Total Assets for Reportable Segments (Parenthetical) (Detail) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Processing and Storage
Segment Reporting Information [Line Items]
Cash contributed to acquire equity investments	$ 96.9	$ 101.6

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - USD ($)				3 Months Ended				6 Months Ended
	Aug. 04, 2022	Jul. 25, 2022	Jul. 14, 2022	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Dec. 31, 2021
Subsequent Event [Line Items]
Long-term debt				$ 2,937,400,000				$ 2,937,400,000	$ 2,543,500,000
Distributions to unitholders - per unit/share				$ 0.5492	$ 0.5167	$ 0.4526	$ 0.4471
Term Loan A Facility
Subsequent Event [Line Items]
Borrowings				$ 380,000,000				380,000,000
Maximum borrowing capacity				400,000,000				$ 400,000,000
Credit facility - Term								5 years
Cash received								$ 20,000,000
Long-term debt				25,000,000				25,000,000
Revolving Credit Facility
Subsequent Event [Line Items]
Borrowings				91,000,000				91,000,000
Maximum borrowing capacity				$ 1,000,000,000				$ 1,000,000,000
Credit facility - Term								5 years
Subsequent Event \| Term Loan A Facility \| Minimum
Subsequent Event [Line Items]
Credit facility - maturity period			2024-12
Subsequent Event \| Term Loan A Facility \| Maximum
Subsequent Event [Line Items]
Credit facility - maturity period			2027-07
Subsequent Event \| Revolving Credit Facility
Subsequent Event [Line Items]
Maximum borrowing capacity			$ 1,400,000,000
Additional increase in accordion feature			$ 750,000,000
Subsequent Event \| Class A Shares
Subsequent Event [Line Items]
Quarterly cash distribution declared per Class A share		$ 0.5559
Distribution made to limited partner, approximate increase in percentage than prior year quarter declared		1.20%
Subsequent Event \| Class B Shares
Subsequent Event [Line Items]
Distributions to unitholders - per unit/share	$ 0.5559