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Related-Party Transactions - Summary of WES Operating 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]          
General and administrative $ 85,929 $ 66,146 $ 161,079 $ 132,932  
Consolidated balance sheets [Abstract]          
Other current assets 78,756   78,756   $ 64,253
Other assets 367,610   367,610   348,697
Accounts and imbalance payables 510,372   510,372   319,170
Consolidated statements of cash flows [Abstract]          
Distributions to WES Operating unitholders [1]     (754,318) (696,249)  
Related Parties [Member]          
Consolidated statements of operations [Abstract]          
General and administrative 0 179 (20) 210  
Consolidated balance sheets [Abstract]          
Other current assets 8,819   8,819   524
Other assets 33,311   33,311   33,124
Accounts and imbalance payables 30,545   30,545   20,639
Consolidated statements of cash flows [Abstract]          
Distributions to WES Operating unitholders     (307,289) (311,914)  
WES Operating [Member]          
Consolidated statements of operations [Abstract]          
General and administrative 85,226 65,845 160,031 132,819  
Consolidated balance sheets [Abstract]          
Other current assets 77,128   77,128   63,604
Other assets 362,827   362,827   345,529
Accounts and imbalance payables 513,455   513,455   376,947
Consolidated statements of cash flows [Abstract]          
Distributions to WES Operating unitholders [2]     (764,594) (710,646)  
WES Operating [Member] | Related Parties [Member]          
Consolidated statements of operations [Abstract]          
General and administrative 980 $ 1,019 2,480 2,556  
Consolidated balance sheets [Abstract]          
Other current assets 8,636   8,636   447
Other assets 28,529   28,529   29,957
Accounts and imbalance payables $ 33,857   33,857   $ 76,040
Consolidated statements of cash flows [Abstract]          
Distributions to WES Operating unitholders     $ (764,594) $ (710,646)  
[1] See Note 6.
[2] See Note 6.