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%

Limited liability company LLC or limited partnership LP managing member or general partner ownership non-controlling economic interest.

No definition available.

Name:	hesm_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipNonControllingEconomicInterest
Namespace Prefix:	hesm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration