v3.24.1.u1

Description of Business and Basis of Presentation - Assets and Investments Table (Details) | Mar. 31, 2024 unit
--- | ---
Wholly Owned and Operated [Member] | Gathering Systems [Member] |
Assets [Line Items] |
Assets, number of units | 18
Wholly Owned and Operated [Member] | Treating Facilities [Member] |
Assets [Line Items] |
Assets, number of units | 38
Wholly Owned and Operated [Member] | Natural-Gas Processing Plants/Trains [Member] |
Assets [Line Items] |
Assets, number of units | 24
Wholly Owned and Operated [Member] | Natural-Gas Liquids Pipelines [Member] |
Assets [Line Items] |
Assets, number of units | 3
Wholly Owned and Operated [Member] | Natural-Gas Pipelines [Member] |
Assets [Line Items] |
Assets, number of units | 6
Wholly Owned and Operated [Member] | Crude-Oil Pipelines [Member] |
Assets [Line Items] |
Assets, number of units | 3
Operated Interests [Member] | Gathering Systems [Member] |
Assets [Line Items] |
Assets, number of units | 2
Operated Interests [Member] | Treating Facilities [Member] |
Assets [Line Items] |
Assets, number of units | 3
Operated Interests [Member] | Natural-Gas Processing Plants/Trains [Member] |
Assets [Line Items] |
Assets, number of units | 3
Operated Interests [Member] | Crude-Oil Pipelines [Member] |
Assets [Line Items] |
Assets, number of units | 1
Non-Operated Interests [Member] | Gathering Systems [Member] |
Assets [Line Items] |
Assets, number of units | 3
Equity Interests [Member] | Gathering Systems [Member] |
Assets [Line Items] |
Assets, number of units | 1
Equity Interests [Member] | Natural-Gas Processing Plants/Trains [Member] |
Assets [Line Items] |
Assets, number of units | 1
Equity Interests [Member] | Natural-Gas Liquids Pipelines [Member] |
Assets [Line Items] |
Assets, number of units | 4
Equity Interests [Member] | Natural-Gas Pipelines [Member] |
Assets [Line Items] |
Assets, number of units | 1
Equity Interests [Member] | Crude-Oil Pipelines [Member] |
Assets [Line Items] |
Assets, number of units | 1

X
- Definition The number of units in a real estate property owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfUnitsInRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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: | wes_AssetsLineItems
Namespace Prefix: | wes_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InvestmentTypeAxis=wes_OperatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=wes_NaturalGasGatheringSystemMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=wes_NaturalGasTreatingFacilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_NaturalGasProcessingPlantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=wes_NaturalGasLiquidsPipelineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=naics_ZZ486210
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=naics_ZZ486110
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=wes_OperatedInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=wes_NonOperatedInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_EquityMethodInvesteeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |