Related Party Transactions - Summary of Classification of Charges between Operating and Maintenance Expenses and General and Administrative Expenses (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Related Party Transaction [Line Items]
Operating and maintenance expenses	$ 85.6	$ 78.1
Hess
Related Party Transaction [Line Items]
Operating and maintenance expenses	$ 24.9	$ 19.1
Operating Cost and Expense, Related Party [Extensible Enumeration]	us-gaap:RelatedPartyMember	us-gaap:RelatedPartyMember
General and administrative expenses	$ 5.0	$ 3.5
Selling, General, and Administrative Expenses, Related Party [Extensible Enumeration]	us-gaap:RelatedPartyMember	us-gaap:RelatedPartyMember
Total	$ 29.9	$ 22.6