Consolidated Statements of Equity and Partners' Capital - WES Operating - USD ($) $ in Thousands	Total	Occidental [Member]	Chipeta [Member]	Common Units [Member]	Common Units [Member] Occidental [Member]	Noncontrolling Interest [Member]	Noncontrolling Interest [Member] Chipeta [Member]	WES Operating [Member]	WES Operating [Member] Occidental [Member]	WES Operating [Member] WES [Member]	WES Operating [Member] Chipeta [Member]	WES Operating [Member] Common Units [Member]	WES Operating [Member] Common Units [Member] Occidental [Member]	WES Operating [Member] Common Units [Member] WES [Member]	WES Operating [Member] Noncontrolling Interest [Member]	WES Operating [Member] Noncontrolling Interest [Member] Chipeta [Member]
Balance at Dec. 31, 2021	$ 3,095,760			$ 2,966,955		$ 137,687		$ 3,092,666				$ 3,063,289			$ 29,377
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	317,670			301,934		8,953		318,408				315,772			2,636
Distributions to noncontrolling interest owners			$ (1,984)				$ (1,984)				$ (1,984)					$ (1,984)
Distributions to WES Operating unitholders	(134,749)			(131,786)				(140,217)				(140,217)
Contributions of equity-based compensation from related parties		$ 1,949			$ 1,949				$ 1,949	$ 5,663			$ 1,949	$ 5,663
Net contributions from (distributions to) related parties	409			409				409				409
Balance at Mar. 31, 2022	3,270,807			3,134,018		141,851		3,276,894				3,246,865			30,029
Balance at Dec. 31, 2021	3,095,760			2,966,955		137,687		3,092,666				3,063,289			29,377
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	906,422							908,168
Balance at Sep. 30, 2022	3,005,686			2,868,665		138,133		3,009,225				2,977,241			31,984
Balance at Mar. 31, 2022	3,270,807			3,134,018		141,851		3,276,894				3,246,865			30,029
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	315,171			299,550		8,854		315,788				313,201			2,587
Distributions to noncontrolling interest owners			(1,198)				(1,198)				(1,198)					(1,198)
Distributions to WES Operating unitholders	(206,197)			(201,667)				(300,248)				(300,248)
Contributions of equity-based compensation from related parties		241			241				241	6,652			241	6,652
Net contributions from (distributions to) related parties	375			375				375				375
Balance at Jun. 30, 2022	3,305,003			3,164,328		143,500		3,298,504				3,267,086			31,418
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	273,581			259,501		7,836		273,972				271,568			2,404
Distributions to noncontrolling interest owners			(1,838)				(1,838)				(1,838)					(1,838)
Distributions to WES Operating unitholders	(197,744)			(193,213)				(568,107)				(568,107)
Contributions of equity-based compensation from related parties		$ 81			$ 81				$ 81	6,236			$ 81	6,236
Net contributions from (distributions to) related parties	377			377				377				377
Balance at Sep. 30, 2022	3,005,686			2,868,665		138,133		3,009,225				2,977,241			31,984
Balance at Dec. 31, 2022	3,108,115			2,969,604		136,406		3,120,107				3,092,012			28,095
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	208,341			198,959		4,696		208,548				208,013			535
Distributions to noncontrolling interest owners			(2,240)				(2,240)				(2,240)					(2,240)
Distributions to WES Operating unitholders	(196,569)			(192,039)				(213,513)				(213,513)
Contributions of equity-based compensation from related parties										7,058				7,058
Balance at Mar. 31, 2023	3,101,564			2,964,712		134,591		3,119,960				3,093,570			26,390
Balance at Dec. 31, 2022	3,108,115			2,969,604		136,406		3,120,107				3,092,012			28,095
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	752,255							753,968
Balance at Sep. 30, 2023	2,955,092			2,821,958		131,456		2,977,823				2,951,434			26,389
Balance at Mar. 31, 2023	3,101,564			2,964,712		134,591		3,119,960				3,093,570			26,390
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	259,516			247,100		6,595		260,573				259,163			1,410
Distributions to noncontrolling interest owners			(1,230)				(1,230)				(1,230)					(1,230)
Distributions to WES Operating unitholders	(336,987)			(329,227)				(342,895)				(342,895)
Contributions of equity-based compensation from related parties										7,519				7,519
Balance at Jun. 30, 2023	3,022,163			2,888,745		133,096		3,043,927				3,017,357			26,570
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	284,398			270,843		7,102		284,847				283,415			1,432
Distributions to noncontrolling interest owners			$ (1,613)				$ (1,613)				$ (1,613)					$ (1,613)
Distributions to WES Operating unitholders	(221,442)			(216,345)				(356,362)				(356,362)
Contributions of equity-based compensation from related parties										$ 7,024				$ 7,024
Balance at Sep. 30, 2023	$ 2,955,092			$ 2,821,958		$ 131,456		$ 2,977,823				$ 2,951,434			$ 26,389