Consolidated Statements of Equity and Partners' Capital - WES Operating - USD ($) $ in Thousands	Total	Chipeta [Member]	Common Units [Member]	Noncontrolling Interest [Member]	Noncontrolling Interest [Member] Chipeta [Member]	WES Operating [Member]	WES Operating [Member] Chipeta [Member]	WES Operating [Member] WES [Member]	WES Operating [Member] Common Units [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, 2023	$ 3,029,130		$ 2,894,231	$ 131,706		$ 3,052,354			$ 3,027,031		$ 25,323
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	586,216		559,500	13,386		586,517			584,831		1,686
Distributions to noncontrolling interest owners		$ (1,085)			$ (1,085)		$ (1,085)					$ (1,085)
Distributions to WES Operating unitholders	(223,438)		(218,228)			(229,446)			(229,446)
Contributions of equity-based compensation from WES								$ 9,278		$ 9,278
Other	(19,364)		(19,364)
Balance at Mar. 31, 2024	3,376,291		3,225,562	139,416		3,417,618			3,391,694		25,924
Balance at Dec. 31, 2023	3,029,130		2,894,231	131,706		3,052,354			3,027,031		25,323
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	1,269,672					1,271,479
Balance at Sep. 30, 2024	3,377,517		3,225,855	140,690		3,424,947			3,397,488		27,459
Balance at Mar. 31, 2024	3,376,291		3,225,562	139,416		3,417,618			3,391,694		25,924
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	387,564		369,841	8,916		388,428			387,259		1,169
Distributions to noncontrolling interest owners		(593)			(593)		(593)					(593)
Distributions to WES Operating unitholders	(340,858)		(332,930)			(347,675)			(347,675)
Contributions of equity-based compensation from WES								10,247		10,247
Other	(1,831)		(1,831)
Balance at Jun. 30, 2024	3,424,009		3,271,033	140,784		3,468,025			3,441,525		26,500
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	295,892		281,772	7,412		296,534			295,025		1,509
Distributions to noncontrolling interest owners		$ (550)			$ (550)		$ (550)					$ (550)
Distributions to WES Operating unitholders	(340,859)		(332,931)			(347,675)			(347,675)
Contributions of equity-based compensation from WES								8,613		8,613
Other	(2,778)		(2,778)
Balance at Sep. 30, 2024	3,377,517		3,225,855	140,690		3,424,947			3,397,488		27,459
Balance at Dec. 31, 2024	3,375,170		3,224,802	139,565		3,426,126			3,399,650		26,476
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	316,552		301,837	7,545		316,318			315,076		1,242
Distributions to WES Operating unitholders	(340,996)		(333,068)			(347,356)			(347,356)
Contributions of equity-based compensation from WES								8,144		8,144
Other	(18,454)		(18,454)
Balance at Mar. 31, 2025	3,333,571		3,183,365	140,161		3,403,232			3,375,514		27,718
Balance at Dec. 31, 2024	3,375,170		3,224,802	139,565		3,426,126			3,399,650		26,476
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	1,016,186					1,016,496
Balance at Sep. 30, 2025	3,328,636		3,172,802	146,464		3,400,173			3,365,537		34,636
Balance at Mar. 31, 2025	3,333,571		3,183,365	140,161		3,403,232			3,375,514		27,718
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	350,762		333,750	9,082		351,014			348,912		2,102
Distributions to WES Operating unitholders	(355,253)		(347,008)			(363,290)			(363,290)
Contributions of equity-based compensation from WES								10,563		10,563
Other	912		(1,588)	2,500		2,500					2,500
Balance at Jun. 30, 2025	3,333,437		3,179,232	144,475		3,404,019			3,371,699		32,320
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	348,872		331,730	9,257		349,164			346,848		2,316
Distributions to WES Operating unitholders	(355,254)		(347,009)			(363,290)			(363,290)
Contributions of equity-based compensation from WES								$ 10,280		$ 10,280
Other	(1,607)		(1,607)
Balance at Sep. 30, 2025	$ 3,328,636		$ 3,172,802	$ 146,464		$ 3,400,173			$ 3,365,537		$ 34,636