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, 2020	$ 2,895,212			$ 2,778,339		$ 134,081		$ 2,860,751				$ 2,831,199			$ 29,552
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	191,235			181,798		5,444		192,118				190,485			1,633
Distributions to noncontrolling interest owners			$ (276)				$ (276)				$ (276)					$ (276)
Distributions to WES Operating unitholders	(131,265)			(128,447)				(127,470)				(127,470)
Contributions of equity-based compensation from related parties		$ 3,210			$ 3,210				$ 3,210	$ 10,826			$ 3,210	$ 10,826
Net contributions from (distributions to) related parties	1,627			1,627				1,627				1,627
Balance at Mar. 31, 2021	2,942,120			2,821,455		136,698		2,940,786				2,909,877			30,909
Balance at Dec. 31, 2020	2,895,212			2,778,339		134,081		2,860,751				2,831,199			29,552
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	693,150							695,350
Balance at Sep. 30, 2021	3,096,446			2,965,944		141,788		3,091,359				3,057,945			33,414
Balance at Mar. 31, 2021	2,942,120			2,821,455		136,698		2,940,786				2,909,877			30,909
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	238,277			226,295		7,018		239,875				237,611			2,264
Distributions to noncontrolling interest owners			(1,245)				(1,245)				(1,245)					(1,245)
Distributions to WES Operating unitholders	(132,969)			(130,115)				(137,030)				(137,030)
Contributions of equity-based compensation from related parties		2,375			2,375				2,375	4,613			2,375	4,613
Net contributions from (distributions to) related parties	2,881			2,881				2,881				2,881
Balance at Jun. 30, 2021	3,052,873			2,927,066		139,730		3,052,255				3,020,327			31,928
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	263,638			250,198		7,913		263,357				260,658			2,699
Distributions to noncontrolling interest owners			(1,213)				(1,213)				(1,213)					(1,213)
Distributions to WES Operating unitholders	(134,662)			(131,772)				(232,055)				(232,055)
Contributions of equity-based compensation from related parties		2,311			2,311				2,311	4,539			2,311	4,539
Net contributions from (distributions to) related parties	2,165			2,165				2,165				2,165
Balance at Sep. 30, 2021	3,096,446			2,965,944		141,788		3,091,359				3,057,945			33,414
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