View Filing Data

Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2017	May 15, 2017
Document And Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q1
Trading Symbol	HESM
Entity Registrant Name	Hess Midstream Partners LP
Entity Central Index Key	0001619739
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Common Units
Document And Entity Information [Line Items]
Entity Units Outstanding		27,279,654
Subordinated Units
Document And Entity Information [Line Items]
Entity Units Outstanding		27,279,654

BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Assets
Cash	$ 304	$ 304
Total current assets	304	304
Total assets	304	304
Partners' capital
Limited partner	131	131
General partner	173	173
Total partners' capital	304	304
Total liabilities and partners' capital	$ 304	$ 304

STATEMENTS OF OPERATIONS (UNAUDITED) $ in Thousands	3 Months Ended
STATEMENTS OF OPERATIONS (UNAUDITED) $ in Thousands	Mar. 31, 2016 USD ($)
Costs and expenses
Interest expense	$ 155
Total costs and expenses	155
Net income (loss) attributable to Hess Midstream Partners LP	(155)
General partner's interest in net income (loss)	(88)
Limited partner's interest in net income (loss)	$ (67)

STATEMENTS OF CHANGES IN PARTNER'S CAPITAL (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement Of Stockholders Equity [Abstract]
Balance, beginning of period	$ 304	$ 1,308
Net income (loss)		(155)
Balance, end of period	$ 304	$ 1,153

STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities
Net income (loss)		$ (155)
Changes in assets and liabilities:
Accrued liabilities		155
Cash and cash equivalents at beginning of period	$ 304	270
Cash and cash equivalents at end of period	$ 304	$ 270

COMBINED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Assets
Total current assets	$ 304	$ 304
Total assets	304	304
Liabilities
Net parent investment	304	304
Total liabilities and net parent investment	304	304
Predecessor
Assets
Accounts receivable—affiliate	60,300	44,600
Other current assets	1,900	2,800
Total current assets	62,200	47,400
Property, plant and equipment, net	2,518,800	2,518,600
Other noncurrent assets	10,100	8,400
Total assets	2,591,100	2,574,400
Liabilities
Accounts payable—trade	11,200	28,800
Accounts payable—affiliate	267,300	241,300
Accrued liabilities	34,000	57,800
Other current liabilities	1,100	4,100
Total current liabilities	313,600	332,000
Other noncurrent liabilities	4,500	4,300
Total liabilities	318,100	336,300
Net parent investment	2,273,000	2,238,100
Total liabilities and net parent investment	$ 2,591,100	$ 2,574,400

COMBINED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Costs and expenses
Total costs and expenses		$ 155
Net income (loss) attributable to Hess Midstream Partners LP		(155)
Predecessor
Revenues
Affiliate	$ 130,300	118,900
Total revenues	130,300	118,900
Costs and expenses
Operating and maintenance expenses (exclusive of depreciation shown separately below)	38,900	47,900
Depreciation expense	26,800	22,600
General and administrative expenses	1,500	1,400
Total costs and expenses	67,200	71,900
Net income (loss) attributable to Hess Midstream Partners LP	$ 63,100	$ 47,000

COMBINED STATEMENTS OF CHANGES IN NET PARENT INVESTMENT (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Balance, beginning of period	$ 304	$ 1,308
Net income (loss)		(155)
Balance, end of period	304	1,153
Predecessor
Balance, beginning of period	2,238,100	2,097,500
Net income (loss)	63,100	47,000
Contribution of property, plant and equipment		43,600
Other contributions from (distributions to) parent, net	(28,200)	(15,400)
Balance, end of period	$ 2,273,000	$ 2,172,700

COMBINED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities
Net income (loss)		$ (155)
Changes in assets and liabilities:
Accrued liabilities		155
Cash flows from financing activities
Cash and cash equivalents at beginning of period	$ 304	270
Cash and cash equivalents at end of period	304	270
Predecessor
Cash flows from operating activities
Net income (loss)	63,100	47,000
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation expense	26,800	22,600
Changes in assets and liabilities:
Accounts receivable—affiliate	(15,700)	2,600
Other current and noncurrent assets	(800)	1,400
Accounts payable – trade	(17,600)	(30,300)
Accounts payable – affiliate	26,000	20,000
Accrued liabilities	(3,400)	6,600
Other current and noncurrent liabilities	(2,800)	(2,700)
Net cash provided by (used in) operating activities	75,600	67,200
Cash flows from investing activities
Additions to property, plant and equipment	(47,400)	(51,800)
Net cash provided by (used in) investing activities	(47,400)	(51,800)
Cash flows from financing activities
Cash distributions to parent	(95,300)	(44,600)
Other contributions from (distributions to) parent, net	67,100	29,200
Net cash provided by (used in) financing activities	(28,200)	(15,400)
Supplemental cash disclosures:
Capital expenditures included in accrued liabilities at period end	$ 25,600	27,500
Contribution of property, plant and equipment		$ 43,600

Nature of Operations	3 Months Ended
Nature of Operations	Mar. 31, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Nature of Operations	Note 1. Nature of Operations Hess Midstream Partners LP (“we” or the “Partnership”) is a Delaware limited partnership formed on January 17, 2014 by Hess Corporation. Hess Midstream Partners GP LP (“GP LP”) is a limited partnership formed on May 21, 2015 to serve as the general partner of the Partnership. Hess Midstream Partners GP LLC (“GP LLC”) is a limited liability company formed on January 15, 2014 to serve as the general partner of the Partnership and is currently the general partner of GP LP. On January 17, 2014, in connection with the formation of the Partnership, the Partnership issued to (i) the GP LLC a 50% general partner interest in the Partnership for $10 thousand and (ii) to Hess Corporation, a 50% limited partner interest in the Partnership for $10 thousand. In mid‑2015, Hess Corporation transferred its limited partner interest in the Partnership to Hess Infrastructure Partners LP, a midstream joint venture in which GIP II Blue Holding Partnership, LP purchased a 50% ownership interest. As of March 31, 2017 and December 31, 2016, Hess Infrastructure Partners LP had an ownership interest in the Partnership of 43.1% and the GP LLC had an ownership interest of 56.9%, respectively. On April 7, 2017, GP LP filed an amended and restated certificate of limited partnership of the Partnership to reflect GP LP as the sole general partner of the Partnership and the GP LLC ceased to have a direct ownership interest in the Partnership. On April 10, 2017, the Partnership completed its initial public offering (the “IPO”) of common units representing limited partner interests in the Partnership. See Note 4, Subsequent Events.

Basis of Presentation	3 Months Ended
Basis of Presentation	Mar. 31, 2017
Basis of Presentation	Note 2. Basis of Presentation The 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 financial position at March 31, 2017 and December 31, 2016, the results of operations for the three months ended March 31, 2017 and 2016, and cash flows for the three months ended March 31, 2017 and 2016. The unaudited results of operations for the interim periods reported are not necessarily indicative of results to be expected for the full year. These financial statements have been 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 have been condensed or omitted from these financial statements. These financial statements, therefore, should be read in conjunction with the financial statements and related notes included in the prospectus of Hess Midstream Partners LP dated April 4, 2017, as filed with the SEC on April 6, 2017 (the “Prospectus”).
Predecessor
Basis of Presentation	Note 2. Basis of Presentation The accompanying unaudited combined financial statements and related notes present the combined financial position, results of operations, cash flows and net parent investment of the Predecessor. The combined financial statements include 100% of the operations of Gathering Opco, HTGP Opco, Logistics Opco and Mentor Storage Terminal, which are reported based on Hess’s historical cost as entities being under common control. All intercompany transactions and accounts within the Predecessor have been eliminated. The combined 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 combined financial position at March 31, 2017 and December 31, 2016, the combined results of operations for the three months ended March 31, 2017 and 2016, and combined cash flows for the three months ended March 31, 2017 and 2016. The unaudited results of operations for the interim periods reported are not necessarily indicative of results to be expected for the full year. These combined financial statements have been 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 combined financial statements. These financial statements, therefore, should be read in conjunction with the combined financial statements and related notes included in the prospectus of Hess Midstream Partners LP dated April 4, 2017, as filed with the SEC on April 6, 2017 (the “Prospectus”). No goodwill is included in our accompanying combined financial statements as none of the goodwill held by Hess was associated with the historical basis of the Contributed Businesses. Our parent uses a centralized approach to cash management and financing of its operations. Cash generated by and used in our operations is transferred to the parent on a regular basis; therefore, we do not have a cash balance as of March 31, 2017 and December 31, 2016. We have reflected cash management and financing activities performed by the parent as a component of Net parent investment on the Predecessor’s accompanying combined balance sheets, and as Cash distributions to parent and Other contributions from (distributions to) parent, net on the accompanying combined statements of cash flows. We have not included any interest expense related to this funding activity with our parent, since historically our parent has not allocated interest related to such activity with any of its businesses. New Accounting Pronouncements: In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standard Update (ASU) 2014‑09, Revenue from Contracts with Customers, as a new Accounting Standards Codification (ASC) Topic, ASC 606. This ASU is effective for us beginning in the first quarter of 2018, with early adoption permitted from the first quarter of 2017. We have developed a project plan for the implementation of ASC 606 in the first quarter of 2018, and conducted an evaluation of certain revenue contracts with customers against the requirements of the standard. Further analysis is planned in 2017 to complete the implementation plan. Based on our assessment to date, we have not identified any changes to the timing of revenue recognition based on the requirements of ASC 606 that would have a material impact on our combined financial statements. We plan to adopt ASC 606 using the modified retrospective method that requires application of the new standard prospectively from the date of adoption with a cumulative effect adjustment recorded to partners’ capital as of January 1, 2018. In February 2016, the FASB issued ASU 2016‑02, Leases, as a new ASC Topic, ASC 842. The new standard will require the recognition of assets and liabilities for all leases with lease terms greater than one year, including leases currently treated as operating leases under the existing standard. This ASU is effective for us beginning in the first quarter of 2019, with early adoption permitted. We are currently assessing the impact of the ASU on our combined financial statements. In June 2016, the FASB issued ASU 2016‑13, Financial Instruments—Credit Losses. This ASU makes changes to the impairment model for trade receivables, net investments in leases, debt securities, loans and certain other instruments. The standard requires the use of a forward‑looking “expected loss” model compared to the current “incurred loss” model. This ASU is effective for us beginning in the first quarter of 2020, with early adoption permitted from the first quarter of 2019. We are currently assessing the impact of the ASU on our combined financial statements.

Revolving Credit Facility	3 Months Ended
Revolving Credit Facility	Mar. 31, 2017
Debt Disclosure [Abstract]
Revolving Credit Facility	Note 3. Revolving Credit Facility On March 15, 2017, we entered into a four‑year, $300 million senior secured revolving credit facility that became available to us upon the contribution of the Hess Midstream Partners LP Predecessor entities to the Partnership and the closing of the initial public offering on April 10, 2017. The credit facility can be used for borrowings and letters of credit to fund operating activities and capital expenditures of Hess Midstream Partners LP. Borrowings on the credit facility will generally bear interest at the London Interbank Offered Rate (LIBOR) plus an applicable margin of 1.275%. The interest rate is subject to adjustment based on the Partnership’s leverage ratio, which is calculated as total debt to Earnings before Interest, Taxes, Depreciation and Amortization (EBITDA) (as defined in the credit facility). Facility fees will accrue at 0.275% per annum and will be paid quarterly. If the Partnership obtains credit ratings, pricing levels will be based on our credit ratings in effect from time to time. The Partnership is subject to customary covenants in the credit agreement, including a financial covenant that generally requires a leverage ratio of no more than 4.5 to 1.0 for the prior four fiscal quarters. The credit facility is secured by first priority perfected liens on substantially all directly owned assets of the Partnership and its wholly‑owned subsidiaries, including equity interests in subsidiaries, subject to certain customary exclusions. In 2015, the Partnership entered into a five‑year, $350 million senior unsecured revolving credit facility commitment that expired on May 31, 2016. Prior to its expiration, the revolving credit facility accrued fees equal to 0.175% times the actual daily amount of the commitment, which are reflected in interest expense in the accompanying statements of operations.

Subsequent Events	3 Months Ended
Subsequent Events	Mar. 31, 2017
Subsequent Events	Note 4. Subsequent Events On April 10, 2017, the Partnership completed its initial public offering (the “IPO”) of 16,997,000 common units, which included 2,217,000 common units issued pursuant to the exercise of the underwriters’ over‑allotment options, representing 30.5% limited partner interests in the Partnership at a price to the public of $23.00 per unit. A registration statement on Form S‑1, as amended through the time of its effectiveness, was filed by the Partnership with the SEC and was declared effective on April 4, 2017. On April 5, 2017, Hess Midstream Partners LP units began trading on the New York Stock Exchange under the symbol “HESM”. On April 10, 2017, in connection with the closing of the IPO, Hess Infrastructure Partners LP contributed a 20% controlling economic interest in each of Hess North Dakota Pipelines Operations LP, Hess TGP Operations LP and Hess North Dakota Export Logistics Operations LP, and a 100% interest in Hess Mentor Storage Holdings LLC to the Partnership. See Note 1, Description of Business to the combined financial statements of Hess Midstream Partners LP Predecessor. We received gross proceeds of $390.9 million from the IPO. Net proceeds totaled $365.5 million, after deducting the underwriters’ discounts and structuring fees of $25.4 million. The net proceeds were used to make a $350.6 million distribution to Hess Infrastructure Partners LP and to pay approximately $4.0 million in origination fees relating to our new revolving credit facility (see Note 3, Revolving Credit Facility) and $0.9 million other offering costs. The Partnership retained and used the remaining $10.0 million for general partnership purposes, including for funding our working capital needs.
Predecessor
Subsequent Events	Note 11. Subsequent Events We have evaluated events that occurred after March 31, 2017 through the issuance of these combined financials statements. As discussed in Note 3, Initial Public Offering, on April 10, 2017, we completed the IPO of 16,997,000 common units, representing a 30.5% limited partner interest in the Partnership. Immediately prior to the closing of the IPO, all accounts payable affiliate balances were settled via capital contributions from Hess Infrastructure Partners.

Description of Business	3 Months Ended
Description of Business	Mar. 31, 2017
Predecessor
Description of Business	Note 1. Description of Business Hess Midstream Partners LP Predecessor (the “Predecessor”) includes all of the assets, liabilities and results of operations of (i) Hess North Dakota Pipelines Operations LP (“Gathering Opco”), which owns crude oil and natural gas gathering pipelines and compressor stations in North Dakota, (ii) Hess TGP Operations LP (“HTGP Opco”), which owns the Tioga Gas Plant (“TGP”), a natural gas processing and fractionation plant, including a residue gas pipeline in North Dakota, (iii) Hess North Dakota Export Logistics Operations LP (“Logistics Opco”), which owns a crude oil and natural gas liquids (“NGL”) rail loading facility, crude oil rail cars and a crude oil pipeline and truck receipt terminal in North Dakota, and (iv) Hess Mentor Storage Holdings LLC (“Mentor Storage Terminal”), which owns a propane storage cavern and related rail and truck loading and unloading and storage terminal in Minnesota, (collectively, the “Contributed Businesses”). Prior to the IPO, the Contributed Businesses were owned by Hess Infrastructure Partners LP (“Hess Infrastructure Partners”), a midstream joint venture with a 50% ownership interest held by affiliates of Hess Corporation (collectively “Hess”) and a 50% ownership interest held by GIP II Blue Holding Partnership LP (“GIP”). Based on Hess Infrastructure Partners’ governance structure, the commercial agreements between Hess and Hess Infrastructure Partners, and the voting rights established between members, Hess controls the operations of Hess Infrastructure Partners, and the Contributed Businesses are under common control of Hess. On April 10, 2017, in connection with the closing of the initial public offering (the “IPO”) of common units representing limited partner interests of Hess Midstream Partners LP (the “Partnership”), Hess Infrastructure Partners contributed a 20% controlling economic interest in Gathering Opco, HTGP Opco, and Logistics Opco, and a 100% ownership interest in Mentor Storage Terminal to the Partnership (see Note 3, Initial Public Offering). The terms “we,” “our” and “us” as used in the footnotes for periods prior to the IPO refer collectively to our Predecessor and for periods after the IPO refer to the Partnership, unless the context suggests otherwise. These terms are used for convenience only and are not intended as a precise description of any separate legal entity within the Predecessor or the Partnership. The term “parent” refers to Hess Infrastructure Partners. Our assets and operations are organized into the following three segments: (1) gathering, (2) processing and storage and (3) terminaling and export (see Note 10, Segments).

Initial Public Offering

3 Months Ended

Mar. 31, 2017

Predecessor

Initial Public Offering

Note 3. Initial Public Offering

Initial Public Offering

On April 5, 2017, the Partnership’s common units began trading on the New York Stock Exchange under the symbol “HESM.” On April 10, 2017, the Partnership closed its IPO of 16,997,000 common units, which included 2,217,000 common units issued pursuant to the exercise of the underwriters’ over‑allotment option, representing 30.5% limited partner interests in the Partnership at a price to the public of $23.00 per unit. The net proceeds from the IPO of approximately $365.5 million, after deducting the underwriters’ discounts and structuring fees of $25.4 million, were used to make a $350.6 million distribution to Hess Infrastructure Partners and pay the origination fees on our new revolver and other offering costs. The Partnership retained and used the remaining proceeds of $10.0 million for general partnership purposes, including for funding our working capital needs.

Contribution, Conveyance and Assumption Agreement

In connection with the IPO, the Partnership entered into a contribution, conveyance and assumption agreement with Hess Infrastructure Partners pursuant to which Hess Infrastructure Partners contributed to us a 20% controlling economic interest in Gathering Opco, HTGP Opco, Logistics Opco, and a 100% interest in Mentor Holdings. In exchange for the Contributed Businesses, Hess Infrastructure Partners received:

•

10,282,654 common units and 27,279,654 subordinated units, representing an aggregate 67.5% limited partner interest in the Partnership;

•

All of the Partnership’s incentive distribution rights;

•

A 2% general partner interest in the Partnership, and

•

An aggregate cash distribution of approximately $350.6 million.

As part of this agreement, Hess Infrastructure Partners also agreed to bear the full cost of capital expenditures related to certain identified uncompleted maintenance capital projects associated with the Contributed Businesses to the extent such projects are commenced prior to the second anniversary of the closing of the IPO. Hess Infrastructure Partners also agreed to pay all costs related to certain other identified maintenance capital projects related to the Contributed Businesses that are incurred prior to the second anniversary of the closing of the IPO up to an aggregate maximum of $20 million, and all costs of any unanticipated maintenance capital projects undertaken by the Contributed Businesses during the twelve months ending March 31, 2018, up to a maximum of $10 million on a 100% basis.

Omnibus Agreement

In connection with the Partnership’s IPO, we entered into an omnibus agreement with Hess and Hess Infrastructure Partners that addresses our reimbursement of Hess for providing certain operational support and administrative services to us in support of our assets; our right of first offer to acquire certain of Hess Infrastructure Partners’ midstream assets, including Hess Infrastructure Partners’ retained interests in the Contributed Businesses; and Hess Infrastructure Partners’ indemnification of us for certain matters, including certain pre‑closing environmental, title and tax matters. Pursuant to the omnibus agreement, we agreed to indemnify Hess Infrastructure Partners for certain post‑closing matters under this agreement, including certain post‑closing environmental liabilities.

Employee Secondment Agreement

In connection with the Partnership’s IPO, we entered into an employee secondment agreement with Hess under which Hess will second to our general partner certain employees who serve in support of our operations and our general partner will pay a secondment fee to Hess that is intended to cover and reimburse Hess for the total costs actually incurred by Hess and its affiliates in connection with employing the seconded employees to the extent such total costs are attributable to the provision of services with respect to the Partnership’s assets and operations.

Long-Term Incentive Plan

In connection with the Partnership’s IPO, we adopted the Hess Midstream Partners LP 2017 Long‑Term Incentive Plan (the “LTIP”). Awards under the LTIP are available for officers, directors and employees of our general partner or its affiliates, and any individuals who perform services for the Partnership. The LTIP provides the Partnership with the flexibility to grant unit awards, restricted units, phantom units, unit options, unit appreciation rights, distribution equivalent rights, profits interest units and other unit‑based awards. The LTIP will initially limit the number of common units that may be delivered pursuant to vested awards to 3,000,000 common units. Following the closing of the IPO, we granted a total number of 40,652 phantom units with an aggregate value of approximately $0.9 million to certain officers and employees. These phantom units will vest ratably over a three‑year period beginning on the first anniversary of the consummation of the IPO.

Related Party Transactions

3 Months Ended

Mar. 31, 2017

Predecessor

Related Party Transactions

Note 4. Related Party Transactions

We are part of the consolidated operations of Hess, and all of our revenues as shown on the accompanying combined statements of operations for the three months ended March 31, 2017 and 2016 were derived from transactions with Hess and its affiliates, although we plan to provide our services to third parties in the future. Hess also provides substantial operational and administrative services to us in support of our assets and operations, including routine and emergency maintenance and repair services, routine operational activities, routine administrative services, construction and related services, treasury, tax, accounting, human resources, legal and such other services. On a monthly basis, we pay Hess an amount equal to the allocable share of the total costs of Hess’s employees and contractors, subcontractors or other outside personnel engaged by Hess to the extent such employees and outside personnel perform operational support and administrative services for our benefit, plus a specified percentage markup of such amount depending on the type of service provided. Such allocable share is determined by Hess’s corporate transfer pricing practices, as generally applied in a non‑discriminatory manner. In addition, Hess charges us on a monthly basis for the direct costs of providing the services. We believe that these allocations are reasonable and reflect the utilization of services provided and benefits received, but may differ from the cost that would have been incurred had we operated as a stand‑alone partnership for the periods presented.

For the three months ended March 31, 2017 and 2016, 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 March 31,
	2017		2016
(in millions)
Operating and maintenance expenses	$	14.2	$	18.2
General and administrative expenses		1.5		1.4
Total	$	15.7	$	19.6

During the periods presented, Hess Infrastructure Partners funded certain expansion capital expenditures mainly related to the construction of Hawkeye Gas and Oil Facilities for our gathering business. As of March 31, 2017 and December 31, 2016, Accounts payable — affiliate included $248.0 million and $226.2 million, respectively, payable to Hess Infrastructure Partners related to funding of capital expenditures, with the remaining balances payable to Hess for operating and maintenance and general and administrative charges. Immediately prior to the closing of the IPO, all accounts payable affiliate balances were settled via capital contributions from Hess Infrastructure Partners (see Note 11, Subsequent Events).

Commercial Agreements

Effective January 1, 2014, we entered into multiple long‑term, fee‑based commercial agreements with certain subsidiaries of Hess that included dedications covering all of Hess’s existing and future owned or controlled production in the Bakken, minimum volume commitments, inflation escalators, and fee recalculation mechanisms. Under those agreements, if Hess delivered volumes less than applicable commitments during any quarter, then Hess would pay us a shortfall fee equal to the volume deficiency multiplied by the related gathering, processing or terminaling fee, which was initially reported in deferred revenue. Shortfall fee payments were available to be credited against future fees for volumes delivered to us in excess of Hess’s nominated volumes up to four quarters after such credit was established. Unused shortfall credits by Hess, which expired after one year, were recognized as revenue. On December 31, 2016, we amended and restated certain of our commercial agreements to remove the shortfall fee credit provision and reset the minimum volume commitments. Under the amended and restated commercial agreements, volume deficiencies are measured quarterly and recognized as revenue in the same period and any associated shortfall payments are not subject to future reduction or offset. As a result, $21.4 million minimum volume shortfall fee payments were earned during the three months ended March 31, 2017 ($0.4 million during the three months ended March 31, 2016).

While we currently provide all of our midstream services exclusively to Hess, we are actively marketing our midstream services to, and are pursuing strategic relationships with, third‑party producers and other midstream companies with operations in the Bakken in order to maximize our utilization rates and diversify our customer base.

During the three months ended March 31, 2017 and 2016, we recognized, as part of the affiliate revenues, $5.5 million and $7.2 million, respectively, of reimbursements from Hess related to third‑party rail transportation costs. In addition, during the three months ended March 31, 2017 and 2016, we recognized, as part of affiliate revenues, $5.7 million and $5.8 million, respectively, of reimbursements from Hess related to electricity fees. These related costs were included in Operating and maintenance expenses in the accompanying combined statements of operations.

Prepaid Forward Purchase and Sales Agreement

In 2015, we entered into a Prepaid Forward Purchase and Sales Agreement with Hess to receive 550 crude oil rail cars for an estimated purchase price of $104.1 million, all of which were received in 2016. In connection with this agreement, Hess contributed to us $104.1 million, which was recorded as a capital contribution in Net parent investment and was subsequently used to prepay the purchase of the crude oil rail cars from Hess. During the three months ended March 31, 2016, we recognized $38.7 million in Property, plant and equipment and in Contribution of property, plant and equipment in the accompanying combined statements of changes in net parent investment.

Property, Plant and Equipment

3 Months Ended

Mar. 31, 2017

Predecessor

Property, Plant and Equipment

Note 5. Property, Plant and Equipment

Property, plant and equipment, at cost, is as follows:

	Estimated useful lives	March 31, 2017			December 31, 2016
(in millions, except for number of years)
Gathering assets
Pipelines	22 years	$	810.7		$	802.8
Compressors, pumping stations and terminals	22 to 25 years		502.2			182.0
Gas plant assets
Pipelines, pipes and valves	22 to 25 years		460.0			460.0
Equipment	12 to 30 years		428.2			428.2
Buildings	35 years		182.3			182.3
Processing and fractionation facilities	25 years		156.5			154.7
Logistics facilities and railcars	20 to 25 years		349.5			346.0
Storage facilities	20 to 25 years		19.5			19.5
Other	20 to 25 years		7.4			7.2
Construction-in-progress	N/A		120.2			426.8
Total property, plant and equipment, at cost			3,036.5			3,009.5
Accumulated depreciation			(517.7	)		(490.9	)
Property, plant and equipment, net		$	2,518.8		$	2,518.6

Accrued Liabilities

3 Months Ended

Mar. 31, 2017

Predecessor

Accrued Liabilities

Note 6. Accrued Liabilities

Accrued liabilities are as follows:

	March 31, 2017		December 31, 2016
(in millions)
Accrued capital expenditures	$	25.6	$	46.0
Other accruals		8.4		11.8
Total	$	34.0	$	57.8

Subsidiary Guarantor	3 Months Ended
Subsidiary Guarantor	Mar. 31, 2017
Predecessor
Subsidiary Guarantor	Note 7. Subsidiary Guarantor In July 2015, Hess Infrastructure Partners entered into a five‑year, $600.0 million unsecured Term Loan A facility and a five‑year, $400.0 million unsecured syndicated revolving credit facility, which is available for Hess Infrastructure Partners’ general partnership purposes. Prior to the IPO, Gathering Opco, one of the Contributed Businesses, was an initial subsidiary guarantor under both of these credit facilities. The guaranteed obligations include the principal and interest on both credit facilities and payments under letters of credit, if any, issued for the account of Hess Infrastructure Partners. As of March 31, 2017, borrowings attributable to Hess Infrastructure Partners amounted to $577.5 million on the Term Loan A facility and $158.0 million on the revolving credit facility and there were no outstanding letters of credit. As of March 31, 2017, Hess Infrastructure Partners was in compliance with all financial covenants. In connection with the Partnership’s IPO, Gathering Opco was released from its obligation as a guarantor under the Hess Infrastructure Partners credit facilities on April 10, 2017.

Concentration of Credit Risk	3 Months Ended
Concentration of Credit Risk	Mar. 31, 2017
Predecessor
Concentration of Credit Risk	Note 8. Concentration of Credit Risk Hess represented approximately 100% of our total revenues and accounts receivable for the three months ended March 31, 2017 and 2016.

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2017
Predecessor
Commitments and Contingencies	Note 9. Commitments and Contingencies Environmental Contingencies The Partnership is subject to federal, state and local laws and regulations relating to the environment. As of March 31, 2017 and December 31, 2016, accrued liabilities for remediation totaled $3.3 million. Legal Proceedings In the ordinary course of business, the Partnership 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 March 31, 2017 and December 31, 2016, we did not have accrued liabilities for any 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

3 Months Ended

Mar. 31, 2017

Predecessor

Segments

Note 10. 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 earnings before interest, income tax, depreciation and amortization, as further adjusted for 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		Combined Hess Midstream Partners LP Predecessor
(in millions)
For the Three Months Ended March 31, 2017
Affiliate revenues	$	60.2	$	53.2	$	16.9	$	130.3
Net income (loss)		32.0		28.5		2.6		63.1
Depreciation expense		12.3		10.9		3.6		26.8
Adjusted EBITDA		44.3		39.4		6.2		89.9
Capital expenditures		19.2		2.5		5.3		27.0
	Gathering		Processing and Storage		Terminaling and Export		Combined Hess Midstream Partners LP Predecessor
(in millions)
For the Three Months Ended March 31, 2016
Affiliate revenues	$	49.3	$	49.5	$	20.1	$	118.9
Net income (loss)		22.7		23.9		0.4		47.0
Depreciation expense		9.1		10.7		2.8		22.6
Adjusted EBITDA		31.8		34.6		3.2		69.6
Capital expenditures		5.8		27.0		1.8		34.6

Total assets for the reportable segments were as follows:


	March 31, 2017		December 31, 2016
(in millions)
Gathering	$	1,261.6	$	1,246.7
Processing and Storage		1,001.1		1,000.0
Terminaling and Export		328.4		327.7
Total assets	$	2,591.1	$	2,574.4

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8981-108599

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8971-108599

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8595-108599

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8380-108599

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8933-108599

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 26
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8844-108599

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 35
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8984-108599

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9031-108599

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9054-108599

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8538-108599

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 29
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8864-108599

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8924-108599

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8906-108599

+ Details

Basis of Presentation (Policies)	3 Months Ended
Basis of Presentation (Policies)	Mar. 31, 2017
Predecessor
New Accounting Pronouncements	New Accounting Pronouncements: In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standard Update (ASU) 2014‑09, Revenue from Contracts with Customers, as a new Accounting Standards Codification (ASC) Topic, ASC 606. This ASU is effective for us beginning in the first quarter of 2018, with early adoption permitted from the first quarter of 2017. We have developed a project plan for the implementation of ASC 606 in the first quarter of 2018, and conducted an evaluation of certain revenue contracts with customers against the requirements of the standard. Further analysis is planned in 2017 to complete the implementation plan. Based on our assessment to date, we have not identified any changes to the timing of revenue recognition based on the requirements of ASC 606 that would have a material impact on our combined financial statements. We plan to adopt ASC 606 using the modified retrospective method that requires application of the new standard prospectively from the date of adoption with a cumulative effect adjustment recorded to partners’ capital as of January 1, 2018. In February 2016, the FASB issued ASU 2016‑02, Leases, as a new ASC Topic, ASC 842. The new standard will require the recognition of assets and liabilities for all leases with lease terms greater than one year, including leases currently treated as operating leases under the existing standard. This ASU is effective for us beginning in the first quarter of 2019, with early adoption permitted. We are currently assessing the impact of the ASU on our combined financial statements. In June 2016, the FASB issued ASU 2016‑13, Financial Instruments—Credit Losses. This ASU makes changes to the impairment model for trade receivables, net investments in leases, debt securities, loans and certain other instruments. The standard requires the use of a forward‑looking “expected loss” model compared to the current “incurred loss” model. This ASU is effective for us beginning in the first quarter of 2020, with early adoption permitted from the first quarter of 2019. We are currently assessing the impact of the ASU on our combined financial statements.

Related Party Transactions (Tables)

3 Months Ended

Mar. 31, 2017

Predecessor

Summary of Classification of Charges between Operating and Maintenance Expenses and General and Administrative Expenses

	Three Months Ended March 31,
	2017		2016
(in millions)
Operating and maintenance expenses	$	14.2	$	18.2
General and administrative expenses		1.5		1.4
Total	$	15.7	$	19.6

Property, Plant and Equipment (Tables)

3 Months Ended

Mar. 31, 2017

Predecessor

Components of Property, Plant and Equipment

Property, plant and equipment, at cost, is as follows:

	Estimated useful lives	March 31, 2017			December 31, 2016
(in millions, except for number of years)
Gathering assets
Pipelines	22 years	$	810.7		$	802.8
Compressors, pumping stations and terminals	22 to 25 years		502.2			182.0
Gas plant assets
Pipelines, pipes and valves	22 to 25 years		460.0			460.0
Equipment	12 to 30 years		428.2			428.2
Buildings	35 years		182.3			182.3
Processing and fractionation facilities	25 years		156.5			154.7
Logistics facilities and railcars	20 to 25 years		349.5			346.0
Storage facilities	20 to 25 years		19.5			19.5
Other	20 to 25 years		7.4			7.2
Construction-in-progress	N/A		120.2			426.8
Total property, plant and equipment, at cost			3,036.5			3,009.5
Accumulated depreciation			(517.7	)		(490.9	)
Property, plant and equipment, net		$	2,518.8		$	2,518.6

Accrued Liabilities (Tables)

3 Months Ended

Mar. 31, 2017

Predecessor

Schedule of Accrued Liabilities

Accrued liabilities are as follows:

	March 31, 2017		December 31, 2016
(in millions)
Accrued capital expenditures	$	25.6	$	46.0
Other accruals		8.4		11.8
Total	$	34.0	$	57.8

Segments (Tables) - Predecessor

3 Months Ended

Mar. 31, 2017

Financial Data for Each Reportable Segment

The following tables reflect certain financial data for each reportable segment:

	Gathering		Processing and Storage		Terminaling and Export		Combined Hess Midstream Partners LP Predecessor
(in millions)
For the Three Months Ended March 31, 2017
Affiliate revenues	$	60.2	$	53.2	$	16.9	$	130.3
Net income (loss)		32.0		28.5		2.6		63.1
Depreciation expense		12.3		10.9		3.6		26.8
Adjusted EBITDA		44.3		39.4		6.2		89.9
Capital expenditures		19.2		2.5		5.3		27.0
	Gathering		Processing and Storage		Terminaling and Export		Combined Hess Midstream Partners LP Predecessor
(in millions)
For the Three Months Ended March 31, 2016
Affiliate revenues	$	49.3	$	49.5	$	20.1	$	118.9
Net income (loss)		22.7		23.9		0.4		47.0
Depreciation expense		9.1		10.7		2.8		22.6
Adjusted EBITDA		31.8		34.6		3.2		69.6
Capital expenditures		5.8		27.0		1.8		34.6

Total Assets for Reportable Segments

Total assets for the reportable segments were as follows:


	March 31, 2017		December 31, 2016
(in millions)
Gathering	$	1,261.6	$	1,246.7
Processing and Storage		1,001.1		1,000.0
Terminaling and Export		328.4		327.7
Total assets	$	2,591.1	$	2,574.4

Nature of Operations - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Jan. 17, 2014	Jun. 30, 2015
GIP II Blue Holding Partnership, LP
Schedule Of Equity Method Investments [Line Items]
Percentage of ownership interest purchased in midstream joint venture				50.00%
Hess Midstream Partners GP LLC
Schedule Of Equity Method Investments [Line Items]
Percentage of ownership interest		56.90%	50.00%
Amount contributed in partnership			$ 10
Hess Corporation
Schedule Of Equity Method Investments [Line Items]
Amount contributed in partnership			$ 10
Percentage of ownership interest			50.00%
Hess Infrastructure Partners LP
Schedule Of Equity Method Investments [Line Items]
Percentage of ownership interest	43.10%

Revolving Credit Facility - Additional Information (Detail) - USD ($)		3 Months Ended	12 Months Ended
	Mar. 15, 2017	Mar. 31, 2017	Dec. 31, 2015
Senior Secured Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit facility - Term	4 years
Maximum borrowing capacity	$ 300,000,000
Percentage of facility fees accrued per annum and paid quarterly	0.275%
Debt covenant, leverage ratio		450.00%
Senior Secured Revolving Credit Facility \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Interest rate, applicable margin	1.275%
Senior Unsecured Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit facility - Term			5 years
Maximum borrowing capacity			$ 350,000,000
Accrued fees as a percentage of daily commitment			0.175%

Subsequent Events - Additional Information (Detail) - Subsequent Event $ / shares in Units, $ in Millions	Apr. 10, 2017 USD ($) $ / shares shares
Subsequent Event [Line Items]
Initial public offering, common units \| shares	16,997,000
Common unit representing limited partner interest percentage	30.50%
Common units issued price, per share \| $ / shares	$ 23.00
Proceeds from Initial Public Offering, gross	$ 390.9
Proceeds from Initial Public Offering, net	365.5
Cash distributed	350.6
Underwriting discount and structuring fee	25.4
Revolving credit facility origination fee	4.0
Other offering costs	0.9
Remaining proceeds of cash retained for general purposes	$ 10.0
Predecessor
Subsequent Event [Line Items]
Initial public offering, common units \| shares	16,997,000
Common unit representing limited partner interest percentage	2.00%
Proceeds from Initial Public Offering, net	$ 365.5
Cash distributed	350.6
Underwriting discount and structuring fee	25.4
Remaining proceeds of cash retained for general purposes	$ 10.0
Gathering Opco
Subsequent Event [Line Items]
Common unit representing limited partner interest percentage	20.00%
Hess North Dakota Export Logistics Operations Limited Partnership
Subsequent Event [Line Items]
Common unit representing limited partner interest percentage	20.00%
Hess Mentor Storage Holdings Limited Liability Company
Subsequent Event [Line Items]
Common unit representing limited partner interest percentage	100.00%
Hess T G P Operations Limited Partnership
Subsequent Event [Line Items]
Common unit representing limited partner interest percentage	20.00%
Over-Allotment Options
Subsequent Event [Line Items]
Initial public offering, common units \| shares	2,217,000
Over-Allotment Options \| Predecessor
Subsequent Event [Line Items]
Initial public offering, common units \| shares	2,217,000
Common unit representing limited partner interest percentage	30.50%
Common units issued price, per share \| $ / shares	$ 23.00
IPO \| Predecessor
Subsequent Event [Line Items]
Common unit representing limited partner interest percentage	30.50%

Description of Business - Additional Information (Detail) - Segment		3 Months Ended
	Apr. 10, 2017	Mar. 31, 2017
Subsequent Event
Description Of Business [Line Items]
Percentage of ownership interest	30.50%
Subsequent Event \| Gathering Opco
Description Of Business [Line Items]
Percentage of ownership interest	20.00%
Subsequent Event \| Hess T G P Operations Limited Partnership
Description Of Business [Line Items]
Percentage of ownership interest	20.00%
Subsequent Event \| Hess North Dakota Export Logistics Operations Limited Partnership
Description Of Business [Line Items]
Percentage of ownership interest	20.00%
Subsequent Event \| Hess Mentor Storage Holdings Limited Liability Company
Description Of Business [Line Items]
Percentage of ownership interest	100.00%
Predecessor
Description Of Business [Line Items]
Number of operating segments		3
Predecessor \| Hess Corporation
Description Of Business [Line Items]
Percentage of ownership in joint venture		50.00%
Predecessor \| GIP II Blue Holding Partnership, LP
Description Of Business [Line Items]
Percentage of ownership in joint venture		50.00%
Predecessor \| Subsequent Event
Description Of Business [Line Items]
Percentage of ownership interest	2.00%
Predecessor \| Subsequent Event \| IPO
Description Of Business [Line Items]
Percentage of ownership interest	30.50%
Predecessor \| Subsequent Event \| Hess Infrastructure Partners LP \| IPO \| Gathering Opco
Description Of Business [Line Items]
Percentage of ownership interest	20.00%
Predecessor \| Subsequent Event \| Hess Infrastructure Partners LP \| IPO \| Hess T G P Operations Limited Partnership
Description Of Business [Line Items]
Percentage of ownership interest	20.00%
Predecessor \| Subsequent Event \| Hess Infrastructure Partners LP \| IPO \| Hess North Dakota Export Logistics Operations Limited Partnership
Description Of Business [Line Items]
Percentage of ownership interest	20.00%
Predecessor \| Subsequent Event \| Hess Infrastructure Partners LP \| IPO \| Hess Mentor Storage Holdings Limited Liability Company
Description Of Business [Line Items]
Percentage of ownership interest	100.00%

Basis of Presentation - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cash	$ 304,000	$ 304,000
Predecessor
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Goodwill	0
Cash	$ 0	$ 0
Predecessor \| Gathering Opco
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Consolidation percentage	100.00%
Predecessor \| Hess T G P Operations Limited Partnership
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Consolidation percentage	100.00%
Predecessor \| Hess North Dakota Export Logistics Operations Limited Partnership
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Consolidation percentage	100.00%
Predecessor \| Hess Mentor Storage Holdings Limited Liability Company
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Consolidation percentage	100.00%

Initial Public Offering - Additional Information (Detail) - USD ($)			3 Months Ended
	Apr. 10, 2017	Mar. 31, 2017	Mar. 31, 2017
Hess Infrastructure Partners LP
Subsidiary Sale Of Stock [Line Items]
Percentage of ownership interest		43.10%
Subsequent Event
Subsidiary Sale Of Stock [Line Items]
Initial public offering, common units	16,997,000
Percentage of ownership interest	30.50%
Initial public offering common units per share	$ 23.00
Net proceeds from IPO	$ 365,500,000
Underwriting discount and structuring fee	25,400,000
Cash distributed	350,600,000
Remaining proceeds of cash retained for general purposes	$ 10,000,000
Subsequent Event \| Over-Allotment Options
Subsidiary Sale Of Stock [Line Items]
Initial public offering, common units	2,217,000
Predecessor
Subsidiary Sale Of Stock [Line Items]
Initial public offering period			On April 5, 2017, the Partnership’s common units began trading on the New York Stock Exchange under the symbol “HESM.” On April 10, 2017, the Partnership closed its IPO of 16,997,000 common units, which included 2,217,000 common units issued pursuant to the exercise of the underwriters’ overallotment option, representing 30.5% limited partner interests in the Partnership at a price to the public of $23.00 per unit.
Predecessor \| 2017 Long-Term Incentive Plan
Subsidiary Sale Of Stock [Line Items]
Available common units pursuant to vested awards		3,000,000	3,000,000
Phantom units granted			40,652
Phantom units aggregate value			$ 900,000
Phantom units vesting period			3 years
Predecessor \| Subsequent Event
Subsidiary Sale Of Stock [Line Items]
Initial public offering, common units	16,997,000
Percentage of ownership interest	2.00%
Net proceeds from IPO	$ 365,500,000
Underwriting discount and structuring fee	25,400,000
Cash distributed	350,600,000
Remaining proceeds of cash retained for general purposes	$ 10,000,000
Percentage of contribution to unanticipated maintenance capital projects, costs	100.00%
Predecessor \| Subsequent Event \| Maximum
Subsidiary Sale Of Stock [Line Items]
Other identified maintenance capital projects, costs	$ 20,000,000
Unanticipated maintenance capital projects, estimated costs in March 31, 2018	$ 10,000,000
Predecessor \| Subsequent Event \| Hess North Dakota Export Logistics Operations Limited Partnership
Subsidiary Sale Of Stock [Line Items]
Percentage of ownership interest	20.00%
Predecessor \| Subsequent Event \| Hess T G P Operations Limited Partnership
Subsidiary Sale Of Stock [Line Items]
Percentage of ownership interest	20.00%
Predecessor \| Subsequent Event \| Gathering Opco
Subsidiary Sale Of Stock [Line Items]
Percentage of ownership interest	20.00%
Predecessor \| Subsequent Event \| Mentor Holdings
Subsidiary Sale Of Stock [Line Items]
Percentage of ownership interest contributed	100.00%
Predecessor \| Subsequent Event \| Hess Infrastructure Partners LP
Subsidiary Sale Of Stock [Line Items]
Percentage of ownership interest	67.50%
Predecessor \| Subsequent Event \| Hess Infrastructure Partners LP \| Common Units
Subsidiary Sale Of Stock [Line Items]
Stock issued during period, shares	10,282,654
Predecessor \| Subsequent Event \| Hess Infrastructure Partners LP \| Subordinated Units
Subsidiary Sale Of Stock [Line Items]
Stock issued during period, shares	27,279,654
Predecessor \| Subsequent Event \| Over-Allotment Options
Subsidiary Sale Of Stock [Line Items]
Initial public offering, common units	2,217,000
Percentage of ownership interest	30.50%
Initial public offering common units per share	$ 23.00

Related Party Transactions - Summary of Classification of Charges between Operating and Maintenance Expenses and General and Administrative Expenses (Detail) - Hess - Predecessor - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Related Party Transaction [Line Items]
Operating and maintenance expenses	$ 14.2	$ 18.2
General and administrative expenses	1.5	1.4
Total	$ 15.7	$ 19.6

Related Party Transactions - Additional Information (Detail) - Predecessor		3 Months Ended
	Dec. 31, 2015 USD ($) Railcars	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)
Related Party Transaction [Line Items]
Accounts payable—affiliate		$ 267,300,000		$ 241,300,000
Contribution of property, plant and equipment			$ 43,600,000
Hess Infrastructure Partners LP
Related Party Transaction [Line Items]
Accounts payable—affiliate		$ 248,000,000		$ 226,200,000
Hess
Related Party Transaction [Line Items]
Revenue recognition period		1 year
Minimum volume shortfall fee payments earned		$ 21,400,000	400,000
Number of crude oil rail cars received under contract \| Railcars	550
Contractual right expected value	$ 104,100,000
Parent contribution pursuant to prepaid forward purchase and sales agreement	$ 104,100,000
Contribution of property, plant and equipment			38,700,000
Hess \| Rail Transportation Costs
Related Party Transaction [Line Items]
Reimbursement revenue		5,500,000	7,200,000
Hess \| Electricity Fees
Related Party Transaction [Line Items]
Reimbursement revenue		$ 5,700,000	$ 5,800,000

Property, Plant and Equipment - Components of Property, Plant and Equipment (Detail) - Predecessor - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Property Plant And Equipment [Line Items]
Total property, plant and equipment, at cost	$ 3,036.5	$ 3,009.5
Accumulated depreciation	(517.7)	(490.9)
Property, plant and equipment, net	2,518.8	2,518.6
Logistics Facilities and Railcars
Property Plant And Equipment [Line Items]
Total property, plant and equipment, at cost	349.5	346.0
Storage Facilities
Property Plant And Equipment [Line Items]
Total property, plant and equipment, at cost	19.5	19.5
Other
Property Plant And Equipment [Line Items]
Total property, plant and equipment, at cost	7.4	7.2
Construction-In-Progress
Property Plant And Equipment [Line Items]
Total property, plant and equipment, at cost	$ 120.2	426.8
Minimum \| Logistics Facilities and Railcars
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	20 years
Minimum \| Storage Facilities
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	20 years
Minimum \| Other
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	20 years
Maximum \| Logistics Facilities and Railcars
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	25 years
Maximum \| Storage Facilities
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	25 years
Maximum \| Other
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	25 years
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	$ 810.7	802.8
Gathering Assets \| Compressors, Pumping Stations and Terminals
Property Plant And Equipment [Line Items]
Total property, plant and equipment, at cost	$ 502.2	182.0
Gathering Assets \| Minimum \| Compressors, Pumping Stations and Terminals
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	22 years
Gathering Assets \| Maximum \| Compressors, Pumping Stations and Terminals
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	$ 460.0	460.0
Gas Plant Assets \| Equipment
Property Plant And Equipment [Line Items]
Total property, plant and equipment, at cost	$ 428.2	428.2
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
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	$ 156.5	$ 154.7
Gas Plant Assets \| Minimum \| Pipelines, Pipes and Valves
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	22 years
Gas Plant Assets \| Minimum \| Equipment
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	12 years
Gas Plant Assets \| Maximum \| Pipelines, Pipes and Valves
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	25 years
Gas Plant Assets \| Maximum \| Equipment
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	30 years

Accrued Liabilities - Schedule of Accrued Liabilities (Detail) - Predecessor - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Accrued Liabilities Current [Line Items]
Accrued capital expenditures	$ 25.6	$ 46.0
Other accruals	8.4	11.8
Total	$ 34.0	$ 57.8

Subsidiary Guarantor - Additional Information (Detail) - Predecessor - Hess Infrastructure Partners LP - USD ($)	1 Months Ended
	Jul. 31, 2015	Mar. 31, 2017
Debt Instrument [Line Items]
Outstanding letters of credit		$ 0
Unsecured Term Loan A Facility
Debt Instrument [Line Items]
Term loan facility, term	5 years
Term loan facility, face amount	$ 600,000,000
Term loan facility, outstanding amount		577,500,000
Unsecured Syndicated Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit facility, term	5 years
Revolving credit facility, maximum borrowing capacity	$ 400,000,000
Revolving credit facility, outstanding amount		$ 158,000,000

Concentration of Credit Risk - Additional Information (Detail) - Predecessor - Credit Concentration Risk	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Accounts Receivable
Concentration Risk [Line Items]
Concentration risk, percentage	100.00%	100.00%
Revenue
Concentration Risk [Line Items]
Concentration risk, percentage	100.00%	100.00%

Commitments and Contingencies - Additional Information (Detail) - Predecessor - USD ($)	Mar. 31, 2017	Dec. 31, 2016
Other Commitments [Line Items]
Accrued liabilities for remediation	$ 3,300,000	$ 3,300,000
Accrued liabilities for legal contingencies	$ 0	$ 0

Segments - Additional Information (Detail)	3 Months Ended
Segments - Additional Information (Detail)	Mar. 31, 2017 Segment
Predecessor
Segment Reporting Information [Line Items]
Number of reportable segments	3

Segments - Financial Data for Each Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Net income (loss)		$ (155)
Predecessor
Segment Reporting Information [Line Items]
Affiliate revenues	$ 130,300	118,900
Net income (loss)	63,100	47,000
Depreciation expense	26,800	22,600
Adjusted EBITDA	89,900	69,600
Capital expenditures	27,000	34,600
Predecessor \| Gathering Opco
Segment Reporting Information [Line Items]
Affiliate revenues	60,200	49,300
Net income (loss)	32,000	22,700
Depreciation expense	12,300	9,100
Adjusted EBITDA	44,300	31,800
Capital expenditures	19,200	5,800
Predecessor \| Processing and Storage
Segment Reporting Information [Line Items]
Affiliate revenues	53,200	49,500
Net income (loss)	28,500	23,900
Depreciation expense	10,900	10,700
Adjusted EBITDA	39,400	34,600
Capital expenditures	2,500	27,000
Predecessor \| Terminaling and Export
Segment Reporting Information [Line Items]
Affiliate revenues	16,900	20,100
Net income (loss)	2,600	400
Depreciation expense	3,600	2,800
Adjusted EBITDA	6,200	3,200
Capital expenditures	$ 5,300	$ 1,800

Segments - Total Assets for Reportable Segments (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total assets	$ 304	$ 304
Predecessor
Segment Reporting Information [Line Items]
Total assets	2,591,100	2,574,400
Predecessor \| Gathering Opco
Segment Reporting Information [Line Items]
Total assets	1,261,600	1,246,700
Predecessor \| Processing and Storage
Segment Reporting Information [Line Items]
Total assets	1,001,100	1,000,000
Predecessor \| Terminaling and Export
Segment Reporting Information [Line Items]
Total assets	$ 328,400	$ 327,700