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REVENUE (Tables) | 9 Months Ended
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Sep. 30, 2025
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following is a summary of revenues disaggregated by segment:
| Three Months Ended |  | Nine Months Ended |
| September 30, |  | September 30, |
| 2025 |  | 2024 |  | 2025 |  | 2024 |  |  |  |  |
| (millions) |
Pipeline (a) | $ | 169 |  |  | $ | 112 |  |  | $ | 514 |  |  | $ | 328 |  |  |  |  |  |
Gathering | 145 |  |  | 136 |  |  | 412 |  |  | 404 |  |  |  |  |  |
Total operating revenues | $ | 314 |  |  | $ | 248 |  |  | $ | 926 |  |  | $ | 732 |  |  |  |  |  |
__________________________________ (a) Includes income outside the scope of ASC 606 primarily related to contracts accounted for as leases of $18 million and $2 million for the three months ended September 30, 2025 and 2024, respectively, and $60 million and $6 million for the nine months ended September 30, 2025 and 2024, respectively. The lease income increased for the nine months ended September 30, 2025 from the operating lease obtained as part of the Midwest Pipeline Acquisition.
Summary of Contact Liability Activity | The following is a summary of contract liability activity:
| 2025 |  |  |  |
| (millions)
Balance as of January 1 | $ | 153 |  |  |  |  |
Increases due to cash received or receivable, excluding amounts recognized as revenue during the period | 55 |  |  |  |  |
Revenue recognized that was included in the balance at the beginning of the period | (29) |  |  |  |  |
Balance as of September 30 | $ | 179 |  |  |  |  |
Revenue Expected to be Recognized in Future Periods | The following table presents contract liability amounts as of September 30, 2025 that are expected to be recognized as revenue in future periods:
| (millions)
Remainder of 2025 | $ | 6 |
2026 | 22 |
2027 | 23 |
2028 | 21 |
2029 | 21 |
2030 and thereafter | 86 |
Total | $ | 179 |
The following table presents revenue amounts related to fixed consideration associated with unsatisfied performance obligations as of September 30, 2025 that are expected to be recognized as revenue in future periods:
| (millions)
Remainder of 2025 | $ | 71 |
2026 | 265 |
2027 | 260 |
2028 | 210 |
2029 | 174 |
2030 and thereafter | 375 |
Total | $ | 1,355 |

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-10 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 + Details
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- Definition Tabular disclosure of expected timing for satisfying remaining performance obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b)(1) -SubTopic 10 -Topic 606 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-13 + Details
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