Related-Party Transactions - Summary of WES Related-Party Transactions Tables (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Consolidated statements of operations [Abstract]
Revenues and other	[1]	$ 3,251,721	$ 2,877,155	$ 2,772,592
Equity income, net – related parties		183,483	204,645	226,750
Cost of product		420,900	322,285	188,088
Operation and maintenance		654,566	581,300	580,874
General and administrative		194,017	195,549	155,769
Total operating expenses	[2]	1,950,992	1,745,573	2,129,063
(Gain) loss on divestiture and other, net		(103,676)	(44)	(8,634)
Interest income – Anadarko note receivable		0	0	11,736
Consolidated balance sheets [Abstract]
Accounts receivable, net		554,263	436,513
Other current assets		59,506	46,252
Equity investments		944,696	1,167,187	1,224,813
Other assets	[3]	167,049	158,696
Total assets	[4]	11,271,628	11,273,079
Accounts and imbalance payables		360,562	326,061
Accrued liabilities		254,640	263,249
Other liabilities		385,629	325,806
Total liabilities	[5]	8,163,513	8,177,319
Consolidated statements of cash flows [Abstract]
Distributions from equity-investment earnings – related parties		186,153	213,516	246,637
Capital expenditures	[6]	(487,228)	(313,674)	(423,602)
Contributions to equity investments – related parties		(9,632)	(4,435)	(19,388)
Distributions from equity investments in excess of cumulative earnings – related parties		63,897	41,385	32,160
Distributions to Partnership unitholders		(735,755)	(533,758)	(695,834)
Net contributions from (distributions to) related parties		1,423	8,533	24,466
Finance lease payments		(4,318)	(6,513)	(14,207)
Unit repurchases from Occidental		(487,590)	(217,465)	(32,535)
Service Revenues - Fee Based [Member]
Consolidated statements of operations [Abstract]
Revenues and other		2,602,053	2,462,835	2,584,323
Service Revenues - Product Based [Member]
Consolidated statements of operations [Abstract]
Revenues and other		249,692	122,584	48,369
Product Sales [Member]
Consolidated statements of operations [Abstract]
Revenues and other		399,023	290,947	138,559
Related Parties [Member]
Consolidated statements of operations [Abstract]
Revenues and other		1,795,233	1,632,358	1,820,612
Cost of product		(25,447)	42,805	92,884
Operation and maintenance		5,081	27,805	49,533
General and administrative		2,338	15,613	40,295
Total operating expenses		(18,028)	86,223	182,712
(Gain) loss on divestiture and other, net		1,756	(420)	2,870
Consolidated balance sheets [Abstract]
Accounts receivable, net		313,937	180,205
Other current assets		1,578	12,490
Other assets		29,058	45,494
Total assets		1,289,269	1,405,376
Accounts and imbalance payables		32,150	49,242
Accrued liabilities		11,756	13,914
Other liabilities		268,399	207,365
Total liabilities		312,305	270,521
Consolidated statements of cash flows [Abstract]
Capital expenditures		(470)	(2,000)	0
Distributions to Partnership unitholders		(372,468)	(272,192)	(381,949)
Proceeds from the sale of assets to related parties		200	0	0
Finance lease payments		0	0	(6,382)
Unit repurchases from Occidental		(252,500)	(50,225)	0
Related Parties [Member] | WES Operating [Member]
Consolidated statements of cash flows [Abstract]
Distributions to Partnership unitholders		(24,898)	(14,984)	(15,434)
Related Parties [Member] | Service Revenues - Fee Based [Member]
Consolidated statements of operations [Abstract]
Revenues and other		1,674,959	1,589,367	1,740,999
Related Parties [Member] | Service Revenues - Product Based [Member]
Consolidated statements of operations [Abstract]
Revenues and other		56,907	11,888	8,509
Related Parties [Member] | Product Sales [Member]
Consolidated statements of operations [Abstract]
Revenues and other		$ 63,367	$ 31,103	$ 71,104

[1] Total revenues and other includes related-party amounts of $1.8 billion, $1.6 billion, and $1.8 billion for the years ended December 31, 2022, 2021, and 2020, respectively. See Note 6.

[2] Total operating expenses includes related-party amounts of $(18.0) million, $86.2 million, and $182.7 million for the years ended December 31, 2022, 2021, and 2020, respectively. See Note 6.

[3] Other assets includes $6.5 million and $9.8 million of NGLs line-fill inventory as of December 31, 2022 and 2021, respectively. Other assets also includes $60.4 million and $56.2 million of materials and supplies inventory as of December 31, 2022 and 2021, respectively.

[4] Total assets includes related-party amounts of $1.3 billion and $1.4 billion as of December 31, 2022 and 2021, respectively, which includes related-party Accounts receivable, net of $313.9 million and $180.2 million as of December 31, 2022 and 2021, respectively. See Note 6.

[5] Total liabilities includes related-party amounts of $312.3 million and $270.5 million as of December 31, 2022 and 2021, respectively. See Note 6.

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