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Related-Party Transactions (Tables)
 3 Months Ended
Mar. 31, 2026
Related Party Transaction [Line Items]  
Related-Party Transactions Tables The following tables summarize material related-party transactions included in the Partnership’s consolidated financial statements:
Statements of operations
Three Months Ended 
March 31,
thousands20262025
Revenues and other
Service revenues – fee based$538,061 $541,745 
Service revenues – product based17,026 11,859 
Product sales5,855 4,798 
Other517 — 
Total revenues and other561,459 558,402 
Equity income, net – related parties (1)
14,776 20,435 
Operating expenses
Cost of product (2)
(6,030)(14,014)
Operation and maintenance1,449 1,921 
General and administrative(20)31 
Total operating expenses(4,601)(12,062)
Gain (loss) on divestiture and other, net1,366 — 
_________________________________________________________________________________________
(1)See Note 7.
(2)Includes related-party natural-gas and NGLs imbalances.

Balance sheets
thousandsMarch 31,
2026		December 31,
2025
Assets
Accounts receivable, net$390,511 $407,941 
Other current assets6,478 524 
Equity investments (1)
495,751 504,859 
Other assets33,717 33,124 
Total assets926,457 946,448 
Liabilities
Accounts and imbalance payables25,005 20,639 
Accrued liabilities181,508 14,991 
Other liabilities (2)
1,030,993 631,291 
Total liabilities1,237,506 666,921 
_________________________________________________________________________________________
(1)See Note 7.
(2)Includes contract liabilities from contracts with customers. See Note 2.
6. RELATED-PARTY TRANSACTIONS

Statements of cash flows
Three Months Ended 
March 31,
thousands20262025
Distributions from equity-investment earnings – related parties
$15,763 $23,337 
Contributions to equity investments – related parties(1,768)— 
Distributions from equity investments in excess of cumulative earnings – related parties9,889 11,007 
Distributions to Partnership unitholders (1)
(159,015)(152,899)
Distributions to WES Operating unitholders (2)
(7,332)(6,949)
_________________________________________________________________________________________
(1)Represents common and general partner unit distributions paid to Occidental pursuant to the partnership agreement of the Partnership. See Note 4 and Note 5.
(2)Represents distributions paid to Occidental, through its ownership of WGRAH, pursuant to WES Operating’s partnership agreement. See Note 4 and Note 5.
WES Operating [Member]  
Related Party Transaction [Line Items]  
Related-Party Transactions Tables
The following tables summarize material related-party transactions for WES Operating (which are included in the Partnership’s consolidated financial statements) to the extent the amounts differ materially from the Partnership’s consolidated financial statements:
Statements of operations
Three Months Ended 
March 31,
thousands20262025
General and administrative (1)
$1,500 $1,537 
_________________________________________________________________________________________
(1)Includes an intercompany service fee between the Partnership and WES Operating.

Balance sheets
thousandsMarch 31,
2026		December 31,
2025
Accounts receivable, net (1)
$401,426 $407,941 
Other current assets6,360 447 
Other assets29,245 29,957 
Accounts and imbalance payables (1)
25,005 76,040 
_________________________________________________________________________________________
(1)Includes balances related to transactions between the Partnership and WES Operating.

Statements of cash flows
Three Months Ended 
March 31,
thousands20262025
Distributions to WES Operating unitholders (1)
$(385,911)$(347,356)
_________________________________________________________________________________________
(1)Represents distributions paid to the Partnership and Occidental, through its ownership of WGRAH, according to the terms of WES Operating’s partnership agreement. See Note 4 and Note 5.