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, 2020		$ 2,895,212				$ 2,778,339		$ (17,208)	$ 134,081
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)		191,235				181,798		3,993	5,444
Distributions to noncontrolling interest owners				$ (276)	$ (2,551)					$ (276)	$ (2,551)
Distributions to Partnership unitholders		(131,265)				(128,447)		(2,818)
Unit repurchases	[1]	(16,241)				(16,241)
Contributions of equity-based compensation from related parties			$ 3,210				$ 3,210
Equity-based compensation expense		3,524				3,524
Net contributions from (distributions to) related parties		1,627				1,627
Other		(2,355)				(2,355)
Balance at Mar. 31, 2021		2,942,120				2,821,455		(16,033)	136,698
Balance at Dec. 31, 2020		2,895,212				2,778,339		(17,208)	134,081
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)		693,150
Balance at Sep. 30, 2021		3,096,446				2,965,944		(11,286)	141,788
Balance at Mar. 31, 2021		2,942,120				2,821,455		(16,033)	136,698
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)		238,277				226,295		4,964	7,018
Distributions to noncontrolling interest owners				(1,245)	(2,741)					(1,245)	(2,741)
Distributions to Partnership unitholders		(132,969)				(130,115)		(2,854)
Contributions of equity-based compensation from related parties			2,375				2,375
Equity-based compensation expense		4,746				4,746
Net contributions from (distributions to) related parties		2,881				2,881
Other		(571)				(571)
Balance at Jun. 30, 2021		3,052,873				2,927,066		(13,923)	139,730
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)		263,638				250,198		5,527	7,913
Distributions to noncontrolling interest owners				(1,213)	(4,642)					(1,213)	(4,642)
Distributions to Partnership unitholders		(134,662)				(131,772)		(2,890)
Unit repurchases	[1]	(88,125)				(88,125)
Contributions of equity-based compensation from related parties			2,311				2,311
Equity-based compensation expense		4,668				4,668
Net contributions from (distributions to) related parties		2,165				2,165
Other		(567)				(567)
Balance at Sep. 30, 2021		3,096,446				2,965,944		(11,286)	141,788
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		(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		(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

[1] See Note 5.