Consolidated Statements of Equity and Partners' Capital - USD ($) $ in Thousands		Total	Occidental [Member]	Chipeta [Member]	WES Operating [Member]	Common Units [Member]	Common Units [Member] Occidental [Member]	General Partner [Member]	Noncontrolling Interests [Member]	Noncontrolling Interests [Member] Chipeta [Member]	Noncontrolling Interests [Member] WES Operating [Member]
Balance at Dec. 31, 2021		$ 3,095,760				$ 2,966,955		$ (8,882)	$ 137,687
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)		317,670				301,934		6,783	8,953
Distributions to noncontrolling interest owners				$ (1,984)	$ (2,805)					$ (1,984)	$ (2,805)
Distributions to Partnership unitholders		(134,749)				(131,786)		(2,963)
Unit repurchases	[1]	(5,149)				(5,149)
Contributions of equity-based compensation from related parties			$ 1,949				$ 1,949
Equity-based compensation expense		5,794				5,794
Net contributions from (distributions to) related parties		409				409
Other		(6,088)				(6,088)
Balance at Mar. 31, 2022		3,270,807				3,134,018		(5,062)	141,851
Balance at Dec. 31, 2021		3,095,760				2,966,955		(8,882)	137,687
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)		906,422
Balance at Sep. 30, 2022		3,005,686				2,868,665		(1,112)	138,133
Balance at Mar. 31, 2022		3,270,807				3,134,018		(5,062)	141,851
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)		315,171				299,550		6,767	8,854
Distributions to noncontrolling interest owners				(1,198)	(6,007)					(1,198)	(6,007)
Distributions to Partnership unitholders		(206,197)				(201,667)		(4,530)
Unit repurchases	[1]	(74,068)				(74,068)
Contributions of equity-based compensation from related parties			241				241
Equity-based compensation expense		6,797				6,797
Net contributions from (distributions to) related parties		375				375
Other		(918)				(918)
Balance at Jun. 30, 2022		3,305,003				3,164,328		(2,825)	143,500
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)		273,581				259,501		6,244	7,836
Distributions to noncontrolling interest owners				(1,838)	(11,365)					(1,838)	(11,365)
Distributions to Partnership unitholders		(197,744)				(193,213)		(4,531)
Unit repurchases	[1]	(367,858)				(367,858)
Contributions of equity-based compensation from related parties			$ 81				$ 81
Equity-based compensation expense		6,383				6,383
Net contributions from (distributions to) related parties		377				377
Other		(934)				(934)
Balance at Sep. 30, 2022		3,005,686				2,868,665		(1,112)	138,133
Balance at Dec. 31, 2022		3,108,115				2,969,604		2,105	136,406
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)		208,341				198,959		4,686	4,696
Distributions to noncontrolling interest owners				(2,240)	(4,271)					(2,240)	(4,271)
Distributions to Partnership unitholders		(196,569)				(192,039)		(4,530)
Unit repurchases	[1]	(7,061)				(7,061)
Equity-based compensation expense		7,199				7,199
Other		(11,950)				(11,950)
Balance at Mar. 31, 2023		3,101,564				2,964,712		2,261	134,591
Balance at Dec. 31, 2022		3,108,115				2,969,604		2,105	136,406
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)		752,255
Balance at Sep. 30, 2023		2,955,092				2,821,958		1,678	131,456
Balance at Mar. 31, 2023		3,101,564				2,964,712		2,261	134,591
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)		259,516				247,100		5,821	6,595
Distributions to noncontrolling interest owners				(1,230)	(6,860)					(1,230)	(6,860)
Distributions to Partnership unitholders		(336,987)				(329,227)		(7,760)
Unit repurchases	[1]	(41)				(41)
Equity-based compensation expense		7,665				7,665
Other		(1,464)				(1,464)
Balance at Jun. 30, 2023		3,022,163				2,888,745		322	133,096
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)		284,398				270,843		6,453	7,102
Distributions to noncontrolling interest owners				$ (1,613)	$ (7,129)					$ (1,613)	$ (7,129)
Distributions to Partnership unitholders		(221,442)				(216,345)		(5,097)
Unit repurchases	[1]	(127,500)				(127,500)
Equity-based compensation expense		7,171				7,171
Other		(956)				(956)
Balance at Sep. 30, 2023		$ 2,955,092				$ 2,821,958		$ 1,678	$ 131,456

[1] See Note 5.