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v3.21.2

Basis of Presentation - Additional Information (Detail) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2021 | Dec. 31, 2020
Hess and GIP |  |
Accounting Policies [Line Items] |  |
Noncontrolling interest percentage | 91.20% | 93.70%

X
- Definition Accounting policies. + References No definition available. + Details
Name: | hesm_AccountingPoliciesLineItems
Namespace Prefix: | hesm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Limited liability company LLC or limited partnership LP managing member or general partner ownership non-controlling economic interest. + References No definition available. + Details
Name: | hesm_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipNonControllingEconomicInterest
Namespace Prefix: | hesm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | dei_LegalEntityAxis=hesm_HessAndGIPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |