Earnings per Share - Schedule of Earnings per Share (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Limited Partners Capital Account [Line Items]
Net income	$ 607.7	$ 620.6	$ 617.8
Less: Net income attributable to noncontrolling interest	489.1	536.7	571.4
Net income attributable to Hess Midstream LP	$ 118.6	$ 83.9	$ 46.4
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	$ 2.11	$ 2.03	$ 1.81
Net income attributable to Hess Midstream LP per Class A share, Diluted	$ 2.08	$ 2.01	$ 1.76
Weighted average Class A shares outstanding
Weighted average Class A shares outstanding, Basic	56.2	41.3	25.6
Weighted average Class A shares outstanding, Diluted	56.3	41.4	25.7