v3.26.1
Earnings per Share - Schedule of Earnings per Share (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Limited Partners Capital Account [Line Items]            
Net income $ 173.7 $ 157.7 $ 179.7 $ 161.4 $ 331.4 $ 341.1
Less: Net income attributable to noncontrolling interest 77.3   89.4   147.4 179.2
Net income attributable to Hess Midstream LP $ 96.4   $ 90.3   $ 184.0 $ 161.9
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 $ 0.75   $ 0.74   $ 1.43 $ 1.39
Net income attributable to Hess Midstream LP per Class A share, Diluted $ 0.75   $ 0.74   $ 1.43 $ 1.39
Weighted average Class A shares outstanding            
Weighted average Class A shares outstanding, Basic 128.4   121.8   128.8 116.3
Weighted average Class A shares outstanding, Diluted 128.4   121.8   128.8 116.3