REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 309	$ 244	$ 612	$ 484
Pipeline
Disaggregation of Revenue [Line Items]
Total operating revenues	176	109	345	216
Income outside scope of ASC 606	20	2	41	4
Gathering
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 133	$ 135	$ 267	$ 268

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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+ Details

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details