Earnings per Share - Schedule of Earnings per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Limited Partners Capital Account [Line Items]
Net income	$ 620.6	$ 617.8	$ 484.9
Less: Net income attributable to noncontrolling interest	536.7	571.4	460.9
Net income attributable to Hess Midstream LP	$ 83.9	$ 46.4	$ 24.0
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	$ 2.03	$ 1.81	$ 1.33
Net income attributable to Hess Midstream LP per Class A share, Diluted	$ 2.01	$ 1.76	$ 1.31
Weighted average Class A shares outstanding
Weighted average Class A shares outstanding, Basic	41.3	25.6	18.0
Weighted average Class A shares outstanding, Diluted	41.4	25.7	18.1