Related-Party Transactions - Summary of WES Related-Party Transactions Tables (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Consolidated statements of operations [Abstract]
Revenues and other	[1]	$ 883,362	$ 776,013	$ 2,676,720	$ 2,248,268
Equity income, net – related parties		23,977	35,494	84,227	116,839
Cost of product		32,847	27,590	132,936	123,795
Operation and maintenance		231,066	204,434	649,324	562,104
General and administrative		64,726	55,050	195,498	159,572
Total operating expenses	[2]	511,940	449,265	1,515,384	1,373,793
Consolidated balance sheets [Abstract]
Accounts receivable, net		671,635		671,635		$ 666,637
Other current assets		36,316		36,316		52,986
Equity investments		535,172		535,172		904,535
Other assets	[3]	255,333		255,333		233,455
Total assets	[4]	12,981,224		12,981,224		12,471,607
Accounts and imbalance payables		387,158		387,158		362,451
Accrued liabilities		203,721		203,721		262,572
Other liabilities		624,008		624,008		480,212
Total liabilities	[5]	9,603,707		9,603,707		9,442,477
Consolidated statements of cash flows [Abstract]
Distributions from equity-investment earnings – related parties				83,091	115,897
Contributions to equity investments – related parties				0	(1,153)
Distributions from equity investments in excess of cumulative earnings – related parties				27,560	31,715
Distributions to Partnership unitholders	[6]			(905,155)	(754,998)
Unit repurchases from Occidental	[6]			0	(134,602)
Service Revenues - Fee Based [Member]
Consolidated statements of operations [Abstract]
Revenues and other		814,319	695,547	2,389,366	2,004,920
Service Revenues - Product Based [Member]
Consolidated statements of operations [Abstract]
Revenues and other		49,115	48,446	177,321	142,212
Product Sales [Member]
Consolidated statements of operations [Abstract]
Revenues and other		19,673	31,652	109,076	100,336
Related Parties [Member]
Consolidated statements of operations [Abstract]
Revenues and other		545,207	463,623	1,579,107	1,353,991
Cost of product		(14,638)	(37,083)	(46,685)	(56,214)
Operation and maintenance		2,523	843	8,665	2,493
General and administrative		45	414	299	698
Total operating expenses		(12,070)	(35,826)	(37,721)	(53,023)
Consolidated balance sheets [Abstract]
Accounts receivable, net		393,740		393,740		358,141
Other current assets		3,140		3,140		1,260
Other assets		40,871		40,871		43,216
Total assets		972,923		972,923		1,307,152
Accounts and imbalance payables		57,414		57,414		38,541
Accrued liabilities		5,029		5,029		4,979
Other liabilities		472,075		472,075		335,320
Total liabilities		534,518		534,518		$ 378,840
Consolidated statements of cash flows [Abstract]
Distributions to Partnership unitholders				(451,613)	(382,438)
Unit repurchases from Occidental				0	(127,500)
Related Parties [Member] | WES Operating [Member]
Consolidated statements of cash flows [Abstract]
Distributions to Partnership unitholders				(18,502)	(18,260)
Related Parties [Member] | Service Revenues - Fee Based [Member]
Consolidated statements of operations [Abstract]
Revenues and other		530,434	454,039	1,533,251	1,300,870
Related Parties [Member] | Service Revenues - Product Based [Member]
Consolidated statements of operations [Abstract]
Revenues and other		13,664	(234)	44,214	14,524
Related Parties [Member] | Product Sales [Member]
Consolidated statements of operations [Abstract]
Revenues and other		$ 1,109	$ 9,818	$ 1,642	$ 38,597

[1] Total revenues and other includes related-party amounts of $545.2 million and $1.6 billion for the three and nine months ended September 30, 2024, respectively, and $463.6 million and $1.4 billion for the three and nine months ended September 30, 2023, respectively. See Note 6.

[2] Total operating expenses includes related-party amounts of $(12.1) million and $(37.7) million for the three and nine months ended September 30, 2024, respectively, and $(35.8) million and $(53.0) million for the three and nine months ended September 30, 2023, respectively, all primarily related to changes in imbalance positions. See Note 6.

[3] Other assets includes $3.9 million and $5.7 million of NGLs line-fill inventory as of September 30, 2024, and December 31, 2023, respectively. Other assets also includes $128.9 million and $96.3 million of materials and supplies inventory as of September 30, 2024, and December 31, 2023, respectively.

[4] Total assets includes related-party amounts of $972.9 million and $1.3 billion as of September 30, 2024, and December 31, 2023, respectively, which includes related-party Accounts receivable, net of $393.7 million and $358.1 million as of September 30, 2024, and December 31, 2023, respectively. See Note 6.

[5] Total liabilities includes related-party amounts of $534.5 million and $378.8 million as of September 30, 2024, and December 31, 2023, respectively. See Note 6.

[6] Includes related-party amounts. See Note 6.