Related-Party Transactions - Summary of WES Operating Related-Party Transactions Tables (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Consolidated statements of operations [Abstract]
General and administrative		$ 64,119	$ 64,726	$ 197,051	$ 195,498
Consolidated balance sheets [Abstract]
Accounts receivable, net		682,673		682,673		$ 701,838
Other current assets		57,090		57,090		54,888
Other assets		340,553		340,553		387,028
Accounts and imbalance payables		297,029		297,029		312,945
Consolidated statements of cash flows [Abstract]
Distributions to WES Operating unitholders	[1]			(1,051,503)	(905,155)
Related Parties [Member]
Consolidated statements of operations [Abstract]
General and administrative		0	45	210	299
Consolidated balance sheets [Abstract]
Accounts receivable, net		412,934		412,934		401,315
Other current assets		7,244		7,244		6,671
Other assets		34,631		34,631		41,641
Accounts and imbalance payables		32,827		32,827		20,609
Consolidated statements of cash flows [Abstract]
Distributions to WES Operating unitholders				(470,929)	(451,613)
Related Parties [Member] | WES Operating [Member]
Consolidated statements of cash flows [Abstract]
Distributions to WES Operating unitholders				(21,485)	(18,502)
WES Operating [Member]
Consolidated statements of operations [Abstract]
General and administrative		63,780	64,017	196,599	193,497
Consolidated balance sheets [Abstract]
Accounts receivable, net		703,237		703,237		701,814
Other current assets		55,341		55,341		53,775
Other assets		337,463		337,463		383,808
Accounts and imbalance payables		296,890		296,890		339,108
Consolidated statements of cash flows [Abstract]
Distributions to WES Operating unitholders	[2]			(1,073,936)	(924,796)
WES Operating [Member] | Related Parties [Member]
Consolidated statements of operations [Abstract]
General and administrative		909	$ 944	3,465	3,292
Consolidated balance sheets [Abstract]
Accounts receivable, net		433,522		433,522		401,315
Other current assets		6,496		6,496		6,263
Other assets		31,541		31,541		38,421
Accounts and imbalance payables		$ 32,827		32,827		$ 46,773
Consolidated statements of cash flows [Abstract]
Distributions to WES Operating unitholders				$ (1,073,936)	$ (924,796)

[1] Includes related-party amounts. See Note 6.

[2] Includes related-party amounts. See Note 6.