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v3.26.1

Partnership Distributions - Additional Information (Details) | 6 Months Ended
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Jun. 30, 2026
WES [Member] |
Distribution Made to Limited Partner [Line Items] |
Partnership agreement day requirement of distribution of available cash | 55 days

X
- Definition 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. + References No definition available. + Details
Name: | us-gaap_DistributionMadeToLimitedPartnerLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of days subsequent to each quarter the Partnership is required to make distributions to unitholders of record on the applicable record date. + References No definition available. + Details
Name: | wes_NumberOfDaysSubsequentToQuarterEndThatCashIsRequiredToBeDistributed
Namespace Prefix: | wes_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | dei_LegalEntityAxis=wes_WesternMidstreamPartnersLPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |