Summary of Significant Accounting Policies and Basis of Presentation | Note 2. Summary of Sign ificant Accounting Policies and Basis of Presentation Consolidation . The consolidated financial statements include our accounts and the accounts of entities over which we have a controlling financial interest through our ownership or the majority voting interests of the entity. We consolidate the activities of the Partnership, and prior to the Restructuring the activities of Gathering Opco, HTGP Opco and Logistics Opco, each as a variable interest entity (“VIE”) under U.S. Generally Accepted Accounting Principles (“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 14 , Segments ). At December 31, 2021, our noncontrolling interest represents the 86.7 % interest in the Partnership retained by Hess and GIP (2020: 93.7 %) . Prior to the Restructuring, our noncontrolling interest represented the 80 % interest in the Joint Interest Assets retained by HIP. All intercompany transactions and balances have been eliminated. Use of Estimates. We prepare our consolidated financial statements in conformity with the U.S. GAAP, which require management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the years presented. Changes in facts and circumstances may result in revised estimates and actual results could differ from those estimates. Common Control Transactions. Assets and businesses acquired from Hess and its subsidiaries are accounted for as common control transactions whereby the net assets acquired are combined with net assets of the Company at Hess’ historical carrying value. If any recognized consideration transferred in such a transaction exceeds the carrying value of the net assets acquired, the excess is treated as a capital distribution to Hess, similar to a dividend. To the extent that such transactions require prior periods to be retrospectively adjusted, historical net equity amounts prior to the transaction date are reflected in “Net Parent Investment.” Cash consideration up to the carrying value of net assets acquired is presented as an investing activity in our consolidated statement of cash flows. Cash consideration in excess of the carrying value of net assets acquired is presented as a financing activity in our consolidated statement of cash flows. Cash and Cash Equivalents. Cash equivalents consist of highly liquid investments, which are readily convertible into cash and have maturities of three months or less when acquired. Accounts Receivable. We record affiliate accounts receivable upon performance of services to affiliated companies. Generally, we receive payments from affiliated companies on a monthly basis, shortly after performance of services. There were no doubtful accounts written off, nor have we provided an allowance for doubtful accounts, as of December 31, 2021 and 2020. Property, Plant and Equipment. Property, plant and equipment are stated at the lower of historical cost less accumulated depreciation subject to the results of impairment testing. We capitalize all construction-related direct labor and material costs, as well as indirect construction costs. Indirect construction costs include general engineering, taxes and the cost of funds used during construction. Costs, including complete asset replacements and enhancements or upgrades that increase the original efficiency, productivity or capacity of property, plant and equipment, are also capitalized. The costs of repairs, minor replacements and other projects, which do not increase the original efficiency, productivity or capacity of property, plant and equipment, are expensed as incurred. Capitalization of Interest. Interest charges from borrowings are capitalized on material projects using the weighted average cost of outstanding borrowings until the project is substantially complete and ready for its intended use. Capitalized interest is depreciated over the useful lives of the assets in the same manner as the depreciation of the underlying assets. Impairment of Long‑Lived Assets. We review long-lived assets for impairment whenever events or changes in business circumstances indicate the net book values of the assets may not be recoverable. Factors that indicate potential impairment include a significant decrease in the market value of the asset, operating or cash flow losses associated with the use of the asset, and a significant change in the asset’s physical condition or use. Impairment is indicated when the undiscounted cash flows estimated to be generated by those assets are less than the assets’ net book value. Undiscounted cash flows are based on identifiable cash flows that are largely independent of the cash flows of other assets and liabilities. If impairment occurs, a loss is recognized for the difference between the fair value and net book value. Such fair value is generally determined by discounting anticipated future net cash flows, an income valuation approach, or by a market-based valuation approach, which are Level 3 fair value measurements. No impairments of long‑lived assets were recorded during the years ended December 31, 2021, 2020 and 2019. Leases . We determine if an arrangement is a lease at inception. Operating lease right-of-use assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease right-of-use assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. The operating lease right-of-use asset includes any initial direct costs and excludes lease incentives received. The lease term used in measurement of our lease obligations may include periods covered by an option to extend or terminate the lease when it is reasonably certain that we will exercise that option. Lease expense for lease payments is recognized on a straight-line basis over the lease term. The Company has elected not to recognize lease assets and lease liabilities for leases with a term of 12 months or less for all classes of underlying assets. Our lease agreements may include lease and non-lease components, which are generally accounted for separately. Equity Investments. We account for our investment in LM4 under the equity method of accounting, as we do not control, but have a significant influence over, its operations. During the year ended December 31, 2019, we capitalized $ 4.1 million of interest expense associated with our investment in LM4. Difference in the basis of the investment and the underlying net asset value of the equity investee is amortized into net income over the remaining useful lives of the underlying assets. Earnings from equity investments represent our proportionate share of net income generated by the equity investee. We classify distributions received from equity method investees on the basis of the nature of the activity of the investee that generated the distribution as either a return on investment classified as cash inflows from operating activities or a return of investment classified as cash inflows from investing activities when such information is available to us. Deferred Financing Costs. We capitalize debt issuance costs and fees incurred related to the procurement of our credit facilities. We amortize such costs as additional interest expense over the life of the credit agreement using the straight-line method, which approximates the effective interest method. Unamortized deferred financing costs related to our revolving credit facility are presented in Other noncurrent assets (2021: $ 6.9 million, 2020: $ 9.3 million) and unamortized deferred financing costs and discounts related to our fixed-rate senior notes and our term loan are presented as a direct reduction to the Long-term debt (2021: $ 30.5 million, 2020: $ 23.9 million) in the accompanying consolidated balance sheets. Asset Retirement Obligations. We record legal obligations to remove and dismantle long-lived assets. We recognize a liability for the fair value of legally required asset retirement obligations associated with long-lived assets in the period in which the retirement obligations are incurred if the liability can be reasonably estimated. The associated asset retirement costs are capitalized as part of the carrying amount of the long-lived assets. Accretion expense is included in Depreciation expense in the consolidated statement of operations. At December 31, 2021, the asset retirement obligation balance included in Other noncurrent liabilities was $ 11.0 million and the current portion included in Accrued liabilities was $ 3.0 million (2020: $ 12.8 million and $ 1.7 million, respectively). Net Parent Investment. Net parent investment represents HIP’s historical activity as well as Hess’ historical investment in Hess Water Services prior to its acquisition by HIP, the accumulated net operating results through the date when we obtained control of HIP, and the net effect of transactions between HIP and the Sponsors, and between Hess and Hess Water Services. Retrospectively adjusted financial information from prior to the acquisition of HIP is included in Net parent investment. Revenue Recognition—Contracts with Customers. We earn substantially all of our revenues by charging fees for gathering, compressing and processing natural gas and fractionating NGLs; gathering, terminaling, loading and transporting crude oil and NGLs, gathering and disposing produced water, and storing and terminaling propane. We do not own or take title to the volumes that we handle. Effective January 1, 2014, we entered into (i) gas gathering, (ii) crude oil gathering, (iii) gas processing and fractionation, (iv) storage services and (v) terminal and export services fee‑based commercial agreements with certain subsidiaries of Hess, and effective January 1, 2019, we entered into water gathering and disposal services fee-based agreements with a subsidiary of Hess. Our responsibilities to provide each of the above services for each year under each of the commercial agreements are considered separate, distinct performance obligations. We recognize revenues for each performance obligation under our commercial agreements over‑time as services are rendered using the output method, measured using the amount of volumes serviced during the period. The minimum volume commitments are subject to fluctuation based on nominations covering substantially all of Hess’ production and projected third-party volumes that will be purchased in the Bakken. As the minimum volume commitments are subject to fluctuation, and these commercial agreements contain fee inflation escalators and fee recalculation mechanisms, substantially all of the transaction price, as this term is defined in Accounting Standards Codification (“ASC”) Topic, ASC 606, is variable at inception of each of the commercial agreements. As the variability is resolved prior to the recognition of revenue, we do not apply a constraint to the transaction price at the inception of the commercial agreements. We elected the practical expedient to recognize revenue in the amount to which we have a right to invoice as permitted under ASC 606. Due to this election and as the transaction price allocated to our unsatisfied performance obligations is entirely variable, we have elected the exemption provided by ASC 606 from the disclosure of revenue recognizable in future periods as our unsatisfied performance obligations are fulfilled. There are no significant financing components in any of our commercial agreements. The minimum volumes that Hess provides to our assets under our commercial agreements include dedicated production covering substantially all of Hess’ existing and future owned or controlled production in the Bakken and projected third-party volumes owned or controlled by Hess through dedicated third-party contracts. If Hess delivers volumes less than the applicable minimum volume commitments under our commercial agreements during any quarter, Hess is obligated to pay us a shortfall fee equal to the volume deficiency multiplied by the related gathering, processing and/or terminaling fee, as applicable. Our responsibility to stand-ready to service a minimum volume over each quarterly commitment period represents a separate, distinct performance obligation. Currently, and for the remainder of the Initial Term of each commercial agreement as described in Note 5, volume deficiencies are measured quarterly and recognized as revenue in the same period, as any associated shortfall payments are not subject to future reduction or offset. During the Secondary Term of each commercial agreement as described in Note 5, Hess will be entitled to receive a credit, calculated in barrels or Mcf, as applicable, with respect to the amount of any shortfall fee paid by Hess, which will initially be reported in deferred revenue. Hess may apply such credit against the fees payable for any volumes delivered to us under the applicable agreement in excess of Hess’ nominated volumes up to four quarters after such credit is earned. Unused credits by Hess will be recognized as revenue when they expire after four quarters. However, Hess will not be entitled to receive any such credit with respect to crude oil terminaling services under our terminal and export services agreement. Our revenues also include pass‑through third‑party rail transportation costs, third-party produced water trucking and disposal costs, electricity fees and certain other fees for which we recognize revenues in an amount equal to the costs. Depreciation Expense. We calculate depreciation using the straight-line method based on the estimated useful lives after considering salvage values of our assets. Depreciation lives range from 12 to 35 years . However, factors such as maintenance levels, economic conditions impacting the demand for these assets, and regulatory or environmental requirements could cause us to change our estimates, thus impacting the future calculation of depreciation. Equity‑Based Compensation . Equity‑based compensation issued to the officers, directors and employees of our general partner is recorded at grant‑date fair value. Expense is recognized on a straight‑line basis over the vesting period of the award and is included in General and administrative expenses in the accompanying consolidated statements of operations. Forfeitures are recognized as they occur. Income Taxes . Deferred income taxes are determined using the liability method and reflect temporary differences between the financial statement carrying amount and income tax basis of assets and liabilities recorded using the statutory income tax rate. Regular assessments are made of the likelihood of those deferred tax assets being realized. If it is more likely than not that some or all of the deferred tax assets will not be realized, a valuation allowance is recorded to reduce the deferred tax assets to the amount expected to be realized. Prior to the Restructuring on December 16, 2019, we were not a separate taxable entity for U.S. federal and state income tax purposes; therefore, we did not provide for income tax benefit or expense. Each partner was subject to income taxes on its share of the Partnership’s earnings. On March 1, 2019, HIP acquired Hess Water Services (see Note 4 , Acquisitions ). For the periods prior to March 1, 2019, Hess Water Services was included in the consolidated income tax returns of Hess. The provision for Hess Water Services’ income taxes and income tax assets and liabilities were determined as if it were a standalone taxpayer for all periods presented. For the period from March 1, 2019 through the Restructuring date of December 16, 2019, Hess Water Services was not taxable itself and was not part of a separate taxable entity; therefore, no income tax provision was recognized. Net Income Per Limited Partner Unit. Prior to the Restructuring, we identified the general partner interest and IDRs as participating securities and computed income per unit using the two‑class method under which net income per unit was calculated for common units and participating securities considering both distributions declared and participation rights in undistributed earnings as if all such earnings had been distributed during that period. Net income per unit applicable to limited partners, including subordinated unitholders, was computed by dividing limited partners' interest in net income, after deducting the general partner's 2 % interest and IDRs, by the weighted‑average number of outstanding common and subordinated units. Environmental and Legal Contingencies. We accrue and expense environmental costs on an undiscounted basis to remediate existing conditions related to past operations when the future costs are probable and reasonably estimable. 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. Fair Value Measurements. We measure assets and liabilities requiring fair value presentation using an exit price (i.e., the price that would be received to sell an asset or paid to transfer a liability) and disclose such amounts according to the level of valuation inputs under the following hierarchy: Level 1: Quoted prices in an active market for identical assets or liabilities. Level 2: Inputs other than quoted prices that are directly or indirectly observable. Level 3: Unobservable inputs that are significant to the fair value of assets or liabilities. The classification of an asset or liability within the fair value measurement hierarchy is based on the lowest level of input significant to its fair value. There were no nonrecurring fair value measurements during the years ended December 31, 2021 and 2020. We had other short‑term financial instruments, primarily cash and cash equivalents, accounts receivable and accounts payable, for which the carrying value approximated their fair value as of December 31, 2021 and 2020. Derivatives. We may utilize derivative instruments for financial risk management activities. In these activities, we may use futures, forwards, options and swaps, individually or in combination, to mitigate our exposure to fluctuations in interest rates. All derivative instruments are recorded at fair value in our consolidated balance sheet. Our policy for recognizing the changes in fair value of derivatives varies based on the designation of the derivative. The changes in fair value of derivatives that are not designated as hedges are recognized in earnings. Derivatives may be designated as hedges of expected future cash flows or forecasted transactions (cash flow hedges). Changes in fair value of derivatives that are designated as cash flow hedges are recorded as a component of other comprehensive income (loss). Amounts included in Accumulated other comprehensive income (loss) for cash flow hedges are reclassified into earnings in the same period that the hedged item is recognized in earnings. New Accounting Pronouncements In March 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) 2020-04, Reference Rate Reform , as a new ASC Topic, ASC 848 and also issued subsequent amendments to the initial guidance (collectively, “ASC 848”). The purpose of ASC 848 is to provide optional guidance to ease the potential effects on financial reporting of the market-wide migration away from Interbank Offered Rates, such as London Interbank Offered Rate (“LIBOR”) to alternative reference rates. ASC 848 applies only to contracts, hedging relationships, debt arrangements and other transactions that reference a benchmark reference rate expected to be discontinued because of reference rate reform. ASC 848 contains optional expedients and exceptions for applying U.S. GAAP to transactions affected by this reform. The amendments in the ASU are effective for all entities through December 31, 2022. Borrowing under our Credit Facilities bear interest at LIBOR plus an applicable margin (see Note 8, Debt and Interest Expense ). Although our Credit Facilities mature in 2024, they include provisions for transition to an alternative reference rate without interruption in our ability to borrow under these Credit Facilities. We do not expect our adoption of ASC 848 or transition to an alternative reference rate will have a material impact on our consolidated financial statements. |