Consolidated Statements of Equity and Partners' Capital - USD ($) $ in Thousands	Total	WES Operating [Member]	Chipeta [Member]	Common Units [Member]	General Partner [Member]	Noncontrolling Interests [Member]	Noncontrolling Interests [Member] WES Operating [Member]	Noncontrolling Interests [Member] Chipeta [Member]
Balance at Dec. 31, 2023	$ 3,029,130			$ 2,894,231	$ 3,193	$ 131,706
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	586,216			559,500	13,330	13,386
Distributions to noncontrolling interest owners		$ (4,591)	$ (1,085)				$ (4,591)	$ (1,085)
Distributions to Partnership unitholders	(223,438)			(218,228)	(5,210)
Equity-based compensation expense	9,423			9,423
Other	(19,364)			(19,364)
Balance at Mar. 31, 2024	3,376,291			3,225,562	11,313	139,416
Balance at Dec. 31, 2023	3,029,130			2,894,231	3,193	131,706
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	1,269,672
Balance at Sep. 30, 2024	3,377,517			3,225,855	10,972	140,690
Balance at Mar. 31, 2024	3,376,291			3,225,562	11,313	139,416
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	387,564			369,841	8,807	8,916
Distributions to noncontrolling interest owners		(6,955)	(593)				(6,955)	(593)
Distributions to Partnership unitholders	(340,858)			(332,930)	(7,928)
Equity-based compensation expense	10,391			10,391
Other	(1,831)			(1,831)
Balance at Jun. 30, 2024	3,424,009			3,271,033	12,192	140,784
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	295,892			281,772	6,708	7,412
Distributions to noncontrolling interest owners		(6,956)	$ (550)				(6,956)	$ (550)
Distributions to Partnership unitholders	(340,859)			(332,931)	(7,928)
Equity-based compensation expense	8,759			8,759
Other	(2,778)			(2,778)
Balance at Sep. 30, 2024	3,377,517			3,225,855	10,972	140,690
Balance at Dec. 31, 2024	3,375,170			3,224,802	10,803	139,565
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	316,552			301,837	7,170	7,545
Distributions to noncontrolling interest owners		(6,949)					(6,949)
Distributions to Partnership unitholders	(340,996)			(333,068)	(7,928)
Equity-based compensation expense	8,248			8,248
Other	(18,454)			(18,454)
Balance at Mar. 31, 2025	3,333,571			3,183,365	10,045	140,161
Balance at Dec. 31, 2024	3,375,170			3,224,802	10,803	139,565
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	1,016,186
Balance at Sep. 30, 2025	3,328,636			3,172,802	9,370	146,464
Balance at Mar. 31, 2025	3,333,571			3,183,365	10,045	140,161
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	350,762			333,750	7,930	9,082
Distributions to noncontrolling interest owners		(7,268)					(7,268)
Distributions to Partnership unitholders	(355,253)			(347,008)	(8,245)
Equity-based compensation expense	10,713			10,713
Other	912			(1,588)		2,500
Balance at Jun. 30, 2025	3,333,437			3,179,232	9,730	144,475
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	348,872			331,730	7,885	9,257
Distributions to noncontrolling interest owners		$ (7,268)					$ (7,268)
Distributions to Partnership unitholders	(355,254)			(347,009)	(8,245)
Equity-based compensation expense	10,456			10,456
Other	(1,607)			(1,607)
Balance at Sep. 30, 2025	$ 3,328,636			$ 3,172,802	$ 9,370	$ 146,464