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Consolidated Balance Sheets - WES Operating - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Current assets    
Cash and cash equivalents $ 104,766 $ 819,491
Accounts receivable, net 955,052 773,197
Other current assets 78,756 64,253
Total current assets 1,138,574 1,656,941
Property, plant, and equipment    
Cost 19,286,072 17,648,375
Less accumulated depreciation 6,743,989 6,427,467
Net property, plant, and equipment 12,542,083 11,220,908
Goodwill 391,480 353,257
Other intangible assets 1,384,593 913,758
Equity investments 493,467 504,859
Other assets 367,610 348,697
Total assets [1] 16,317,807 14,998,420
Current liabilities    
Accounts and imbalance payables 510,372 319,170
Short-term debt 168,104 448,825
Accrued ad valorem taxes 41,831 60,114
Accrued liabilities 528,843 408,375
Total current liabilities 1,249,150 1,236,484
Long-term liabilities    
Long-term debt 8,884,977 8,195,170
Deferred income taxes 116,981 111,277
Asset retirement obligations 471,748 427,858
Other liabilities 1,192,801 864,509
Total long-term liabilities 10,666,507 9,598,814
Total liabilities [2] 11,915,657 10,835,298
Equity and partners' capital    
Common units (404,147,536 and 403,205,667 units issued and outstanding at June 30, 2026, and December 31, 2025, respectively) 4,253,799 4,016,606
Total partners' capital 4,258,306 4,021,230
Noncontrolling interest 143,844 141,892
Total equity and partners' capital 4,402,150 4,163,122
Total liabilities, equity, and partners' capital $ 16,317,807 $ 14,998,420
Common units issued 413,172,388 408,141,366
Common units outstanding 413,172,388 408,141,366
WES Operating [Member]    
Current assets    
Cash and cash equivalents $ 98,595 $ 808,372
Accounts receivable, net 955,032 773,165
Other current assets 77,128 63,604
Total current assets 1,130,755 1,645,141
Property, plant, and equipment    
Cost 19,286,072 17,648,375
Less accumulated depreciation 6,743,989 6,427,467
Net property, plant, and equipment 12,542,083 11,220,908
Goodwill 391,480 353,257
Other intangible assets 1,384,593 913,758
Equity investments 493,467 504,859
Other assets 362,827 345,529
Total assets [3] 16,305,205 14,983,452
Current liabilities    
Accounts and imbalance payables 513,455 376,947
Short-term debt 168,104 448,825
Accrued ad valorem taxes 41,831 60,114
Accrued liabilities 471,925 326,873
Total current liabilities 1,195,315 1,212,759
Long-term liabilities    
Long-term debt 8,884,977 8,195,170
Deferred income taxes 37,099 36,646
Asset retirement obligations 471,748 427,858
Other liabilities 1,187,184 859,947
Total long-term liabilities 10,581,008 9,519,621
Total liabilities [4] 11,776,323 10,732,380
Equity and partners' capital    
Common units (404,147,536 and 403,205,667 units issued and outstanding at June 30, 2026, and December 31, 2025, respectively) 3,623,537 3,347,576
Preferred units (21,965,846 units issued and outstanding at June 30, 2026, and December 31, 2025) 868,978 868,978
Total partners' capital 4,492,515 4,216,554
Noncontrolling interest 36,367 34,518
Total equity and partners' capital 4,528,882 4,251,072
Total liabilities, equity, and partners' capital $ 16,305,205 $ 14,983,452
Common units issued 424,275,541 403,205,667
Common units outstanding 424,275,541 403,205,667
Preferred units issued 21,965,846  
Preferred units outstanding 21,965,846  
[1] 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.
[2] 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.
[3] Total assets includes related-party amounts of $901.1 million and $943.2 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 $722.3 million as of June 30, 2026, and December 31, 2025, respectively, which includes related-party accounts and imbalance payables of $33.9 million and $76.0 million as of June 30, 2026, and December 31, 2025, respectively. See Note 6.