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Partnership Distributions - Additional Information (Details)	3 Months Ended
	Mar. 31, 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

X

- Details

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