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Consolidated Balance Sheets - WES Operating - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Current assets    
Cash and cash equivalents $ 647,495 $ 819,491
Accounts receivable, net 822,747 773,197
Other current assets 69,165 64,253
Total current assets 1,539,407 1,656,941
Property, plant, and equipment    
Cost 17,865,350 17,648,375
Less accumulated depreciation 6,570,657 6,427,467
Net property, plant, and equipment 11,294,693 11,220,908
Goodwill 347,643 353,257
Other intangible assets 901,905 913,758
Equity investments 495,751 504,859
Other assets 345,103 348,697
Total assets [1] 14,924,502 14,998,420
Current liabilities    
Accounts and imbalance payables 413,812 319,170
Short-term debt 445,603 448,825
Accrued ad valorem taxes 49,784 60,114
Accrued liabilities 497,958 408,375
Total current liabilities 1,407,157 1,236,484
Long-term liabilities    
Long-term debt 8,194,171 8,195,170
Deferred income taxes 111,898 111,277
Asset retirement obligations 443,152 427,858
Other liabilities 1,261,134 864,509
Total long-term liabilities 10,010,355 9,598,814
Total liabilities [2] 11,417,512 10,835,298
Equity and partners' capital    
Common units (404,147,536 and 403,205,667 units issued and outstanding at March 31, 2026, and December 31, 2025, respectively) 3,361,526 4,016,606
Total partners' capital 3,365,791 4,021,230
Noncontrolling interest 141,199 141,892
Total equity and partners' capital 3,506,990 4,163,122
Total liabilities, equity, and partners' capital $ 14,924,502 $ 14,998,420
Common units issued 393,775,833 408,141,366
Common units outstanding 393,775,833 408,141,366
WES Operating [Member]    
Current assets    
Cash and cash equivalents $ 636,376 $ 808,372
Accounts receivable, net 833,628 773,165
Other current assets 68,904 63,604
Total current assets 1,538,908 1,645,141
Property, plant, and equipment    
Cost 17,865,350 17,648,375
Less accumulated depreciation 6,570,657 6,427,467
Net property, plant, and equipment 11,294,693 11,220,908
Goodwill 347,643 353,257
Other intangible assets 901,905 913,758
Equity investments 495,751 504,859
Other assets 340,631 345,529
Total assets [3] 14,919,531 14,983,452
Current liabilities    
Accounts and imbalance payables 413,521 376,947
Short-term debt 445,603 448,825
Accrued ad valorem taxes 49,784 60,114
Accrued liabilities 456,549 326,873
Total current liabilities 1,365,457 1,212,759
Long-term liabilities    
Long-term debt 8,194,171 8,195,170
Deferred income taxes 33,892 36,646
Asset retirement obligations 443,152 427,858
Other liabilities 1,256,485 859,947
Total long-term liabilities 9,927,700 9,519,621
Total liabilities [4] 11,293,157 10,732,380
Equity and partners' capital    
Common units (404,147,536 and 403,205,667 units issued and outstanding at March 31, 2026, and December 31, 2025, respectively) 2,723,066 3,347,576
Preferred units (21,965,846 units issued and outstanding at March 31, 2026, and December 31, 2025) 868,978 868,978
Total partners' capital 3,592,044 4,216,554
Noncontrolling interest 34,330 34,518
Total equity and partners' capital 3,626,374 4,251,072
Total liabilities, equity, and partners' capital $ 14,919,531 $ 14,983,452
Common units issued 404,147,536 403,205,667
Common units outstanding 404,147,536 403,205,667
Preferred units issued 21,965,846  
Preferred units outstanding 21,965,846  
[1] 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.
[2] 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.
[3] Total assets includes related-party amounts of $932.8 million and $943.2 million as of March 31, 2026, and December 31, 2025, respectively, which includes related-party accounts receivable, net of $401.4 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 $722.3 million as of March 31, 2026, and December 31, 2025, respectively, which includes related-party accounts and imbalance payables of $25.0 million and $76.0 million as of March 31, 2026, and December 31, 2025, respectively. See Note 6.