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Related-Party Transactions - Summary of WES Related-Party Transactions Tables (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Consolidated statements of operations [Abstract]      
Total revenues and other [1] $ 1,123,579 $ 917,116  
Equity income, net – related parties 14,776 20,435  
Cost of product 102,884 41,492  
Operation and maintenance 264,241 226,514  
General and administrative 75,150 66,786  
Total operating expenses [2] 662,795 523,081  
Consolidated balance sheets [Abstract]      
Accounts receivable, net 822,747   $ 773,197
Other current assets 69,165   64,253
Equity investments 495,751   504,859
Other assets 345,103   348,697
Total assets [3] 14,924,502   14,998,420
Accounts and imbalance payables 413,812   319,170
Accrued liabilities 497,958   408,375
Other liabilities 1,261,134   864,509
Total liabilities [4] 11,417,512   10,835,298
Consolidated statements of cash flows [Abstract]      
Distributions from equity-investment earnings – related parties 15,763 23,337  
Contributions to equity investments - related parties (1,768) 0  
Distributions from equity investments in excess of cumulative earnings – related parties 9,889 11,007  
Distributions to Partnership unitholders [5] (379,675) (340,996)  
Service Revenues - Fee Based [Member]      
Consolidated statements of operations [Abstract]      
Total revenues and other 933,302 823,197  
Service Revenues - Product Based [Member]      
Consolidated statements of operations [Abstract]      
Total revenues and other 88,767 59,252  
Product Sales [Member]      
Consolidated statements of operations [Abstract]      
Total revenues and other 99,616 34,469  
Related Parties [Member]      
Consolidated statements of operations [Abstract]      
Total revenues and other 561,459 558,402  
Cost of product (6,030) (14,014)  
Operation and maintenance 1,449 1,921  
General and administrative (20) 31  
Total operating expenses (4,601) (12,062)  
Gain (Loss) on divestiture and other, net 1,366 0  
Consolidated balance sheets [Abstract]      
Accounts receivable, net 390,511   407,941
Other current assets 6,478   524
Other assets 33,717   33,124
Total assets 926,457   946,448
Accounts and imbalance payables 25,005   20,639
Accrued liabilities 181,508   14,991
Other liabilities 1,030,993   631,291
Total liabilities 1,237,506   $ 666,921
Consolidated statements of cash flows [Abstract]      
Distributions to Partnership unitholders (159,015) (152,899)  
Related Parties [Member] | WES Operating [Member]      
Consolidated statements of cash flows [Abstract]      
Distributions to Partnership unitholders (7,332) (6,949)  
Related Parties [Member] | Service Revenues - Fee Based [Member]      
Consolidated statements of operations [Abstract]      
Total revenues and other 538,061 541,745  
Related Parties [Member] | Service Revenues - Product Based [Member]      
Consolidated statements of operations [Abstract]      
Total revenues and other 17,026 11,859  
Related Parties [Member] | Product Sales [Member]      
Consolidated statements of operations [Abstract]      
Total revenues and other 5,855 4,798  
Related Parties [Member] | Other      
Consolidated statements of operations [Abstract]      
Total revenues and other $ 517 $ 0  
[1] Total revenues and other includes related-party amounts of $561.5 million and $558.4 million for the three months ended March 31, 2026 and 2025, respectively. See Note 6.
[2] Total operating expenses includes related-party amounts of $(4.6) million and $(12.1) million for the three months ended March 31, 2026 and 2025, respectively, all primarily related to changes in imbalance positions. See Note 6.
[3] Total assets includes related-party amounts of $926.5 million and $946.4 million as of March 31, 2026, and December 31, 2025, respectively, which includes related-party accounts receivable, net of $390.5 million and $407.9 million as of March 31, 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 March 31, 2026, and December 31, 2025, respectively, which includes related-party accounts and imbalance payables of $25.0 million and $20.6 million as of March 31, 2026, and December 31, 2025, respectively. See Note 6.
[5] See Note 6.