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GENERAL - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Summary of Significant Accounting Policies [Line Items] |  |
Limited partner interest | 48.70% |
Non-voting limited partner interest | 2.00% |
Variable Interest Entity, Primary Beneficiary |  |
Summary of Significant Accounting Policies [Line Items] |  |
Construction in progress | $ 432 |
BlackRock, Inc. |  |
Summary of Significant Accounting Policies [Line Items] |  |
Equity method investment commitments |  | $ 550
WES Midstream segment |  |
Summary of Significant Accounting Policies [Line Items] |  |
Effective economic interest | 50.90% |
WES Midstream segment |  |
Summary of Significant Accounting Policies [Line Items] |  |
Non-voting general partner interest | 2.30% |

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- Definition Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482099/360-10-50-1 + Details
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