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Partnership Distributions - Cash Distributions Tables (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
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Jun. 30, 2026 | Mar. 31, 2026 | Dec. 31, 2025 | Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025
Distribution Made to Limited Partner [Line Items] |  |  |  |  |  |
Total quarterly per-unit distribution | $ 0.930 | $ 0.930 | $ 0.910 | $ 0.910 | $ 0.910 | $ 0.910
Total quarterly cash distribution | $ 392,679 | $ 374,643 | $ 379,675 | $ 379,521 | $ 355,254 | $ 355,253
WES Operating [Member] |  |  |  |  |  |
Distribution Made to Limited Partner [Line Items] |  |  |  |  |  |
Total quarterly cash distribution | $ 405,281 | $ 378,683 | $ 385,911 | $ 391,568 | $ 363,290 | $ 363,290

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- Definition Amount of equity impact of cash distribution declared to unit-holder of limited partnership (LP). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1 + Details
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- Definition Per unit of ownership amount of cash distributions declared to unit-holder of a limited partnership (LP). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1 + Details
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