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Related-Party Transactions - Summary of WES Related-Party Transactions Tables (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Consolidated statements of operations [Abstract]          
Total revenues and other [1] $ 1,224,719 $ 942,322 $ 2,348,298 $ 1,859,438  
Equity income, net – related parties 21,536 27,128 36,312 47,563  
Cost of product 117,440 42,681 220,324 84,173  
Operation and maintenance 285,353 224,629 549,594 451,143  
General and administrative 85,929 66,146 161,079 132,932  
Total operating expenses [2] 714,954 524,060 1,377,749 1,047,141  
Consolidated balance sheets [Abstract]          
Accounts receivable, net 955,052   955,052   $ 773,197
Other current assets 78,756   78,756   64,253
Equity investments 493,467   493,467   504,859
Other assets 367,610   367,610   348,697
Total assets [3] 16,317,807   16,317,807   14,998,420
Accounts and imbalance payables 510,372   510,372   319,170
Accrued liabilities 528,843   528,843   408,375
Other liabilities 1,192,801   1,192,801   864,509
Total liabilities [4] 11,915,657   11,915,657   10,835,298
Consolidated statements of cash flows [Abstract]          
Distributions from equity-investment earnings – related parties     40,375 51,419  
Contributions to equity investments - related parties     (2,578) 0  
Distributions from equity investments in excess of cumulative earnings – related parties     9,907 14,047  
Distributions to Partnership unitholders [5]     (754,318) (696,249)  
Service Revenues - Fee Based [Member]          
Consolidated statements of operations [Abstract]          
Total revenues and other 980,096 851,419 1,913,398 1,674,616  
Service Revenues - Product Based [Member]          
Consolidated statements of operations [Abstract]          
Total revenues and other 112,641 50,442 201,408 109,694  
Product Sales [Member]          
Consolidated statements of operations [Abstract]          
Total revenues and other 124,763 40,280 224,379 74,749  
Related Parties [Member]          
Consolidated statements of operations [Abstract]          
Total revenues and other 570,024 576,247 1,131,483 1,134,649  
Cost of product 39,798 (9,028) 33,768 (23,042)  
Operation and maintenance 1,169 1,560 2,618 3,481  
General and administrative 0 179 (20) 210  
Total operating expenses 40,967 (7,289) 36,366 (19,351)  
Gain (Loss) on divestiture and other, net 0 0 1,366 0  
Consolidated balance sheets [Abstract]          
Accounts receivable, net 370,453   370,453   407,941
Other current assets 8,819   8,819   524
Other assets 33,311   33,311   33,124
Total assets 906,050   906,050   946,448
Accounts and imbalance payables 30,545   30,545   20,639
Accrued liabilities 184,974   184,974   14,991
Other liabilities 979,905   979,905   631,292
Total liabilities 1,195,424   1,195,424   $ 666,922
Consolidated statements of cash flows [Abstract]          
Distributions to Partnership unitholders     (307,289) (311,914)  
Related Parties [Member] | WES Operating [Member]          
Consolidated statements of cash flows [Abstract]          
Distributions to Partnership unitholders     (14,505) (14,217)  
Related Parties [Member] | Service Revenues - Fee Based [Member]          
Consolidated statements of operations [Abstract]          
Total revenues and other 542,295 559,192 1,080,356 1,100,937  
Related Parties [Member] | Service Revenues - Product Based [Member]          
Consolidated statements of operations [Abstract]          
Total revenues and other 18,923 12,254 35,949 24,113  
Related Parties [Member] | Product Sales [Member]          
Consolidated statements of operations [Abstract]          
Total revenues and other 8,163 4,801 14,018 9,599  
Related Parties [Member] | Other          
Consolidated statements of operations [Abstract]          
Total revenues and other $ 643 $ 0 $ 1,160 $ 0  
[1] Total revenues and other includes related-party amounts of $570.0 million and $1.1 billion for the three and six months ended June 30, 2026, respectively, and $576.2 million and $1.1 billion for the three and six months ended June 30, 2025, respectively. See Note 6.
[2] Total operating expenses includes related-party amounts of $41.0 million and $36.4 million for the three and six months ended June 30, 2026, respectively, and $(7.3) million and $(19.4) million for the three and six months ended June 30, 2025, respectively, all primarily related to changes in imbalance positions. See Note 6.
[3] Total assets includes related-party amounts of $906.0 million and $946.4 million as of June 30, 2026, and December 31, 2025, respectively, which includes related-party accounts receivable, net of $370.5 million and $407.9 million as of June 30, 2026, and December 31, 2025, respectively. See Note 6.
[4] Total liabilities includes related-party amounts of $1.2 billion and $666.9 million as of June 30, 2026, and December 31, 2025, respectively, which includes related-party accounts and imbalance payables of $30.5 million and $20.6 million as of June 30, 2026, and December 31, 2025, respectively. See Note 6.
[5] See Note 6.