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REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 314	$ 248	$ 926	$ 732
Pipeline
Disaggregation of Revenue [Line Items]
Total operating revenues	169	112	514	328
Income outside scope of ASC 606	18	2	60	6
Gathering
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 145	$ 136	$ 412	$ 404

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Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.

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