Related Party Transactions - Summary of Third-party Pass-through Costs for Which Revenues in Amount Equal to Costs are Recognized (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Related Party Transaction [Line Items]
Reimbursement revenue	$ 397.7	$ 413.5	$ 786.4	$ 794.5
Chevron
Related Party Transaction [Line Items]
Total	25.8	27.2	56.4	51.8
Chevron \| Electricity and Other Related Fees
Related Party Transaction [Line Items]
Reimbursement revenue	14.0	15.3	31.4	29.8
Chevron \| Produced Water Trucking and Disposal Costs
Related Party Transaction [Line Items]
Reimbursement revenue	$ 11.8	$ 11.9	$ 25.0	$ 22.0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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