Related-Party Transactions - Summary of WES Operating Related-Party Transactions Tables (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Consolidated statements of operations [Abstract]
General and administrative		$ 55,050	$ 48,185	$ 159,572	$ 144,635
Consolidated balance sheets [Abstract]
Other current assets		31,476		31,476		$ 59,506
Other assets	[1]	217,163		217,163		167,049
Accounts and imbalance payables		393,358		393,358		360,562
Accrued liabilities		189,983		189,983		254,640
Consolidated statements of cash flows [Abstract]
Distributions to WES Operating unitholders	[2]			(754,998)	(538,690)
Related Parties [Member]
Consolidated statements of operations [Abstract]
General and administrative		414	81	698	2,289
Consolidated balance sheets [Abstract]
Other current assets		461		461		1,578
Other assets		37,880		37,880		29,058
Accounts and imbalance payables		34,307		34,307		32,150
Accrued liabilities		2,974		2,974		11,756
Consolidated statements of cash flows [Abstract]
Distributions to WES Operating unitholders				(382,438)	(272,797)
WES Operating [Member]
Consolidated statements of operations [Abstract]
General and administrative		54,541	47,783	157,645	142,871
Consolidated balance sheets [Abstract]
Other current assets		30,808		30,808		57,291
Other assets	[3]	215,476		215,476		166,450
Accounts and imbalance payables		409,156		409,156		404,468
Accrued liabilities		145,729		145,729		197,289
Consolidated statements of cash flows [Abstract]
Distributions to WES Operating unitholders	[4]			(912,770)	(1,008,572)
WES Operating [Member] | Related Parties [Member]
Consolidated statements of operations [Abstract]
General and administrative		1,137	$ 795	3,271	4,662
Consolidated balance sheets [Abstract]
Other current assets		408		408		1,487
Other assets		36,193		36,193		28,459
Accounts and imbalance payables		50,204		50,204		76,131
Accrued liabilities		$ 2,657		2,657		$ 11,439
Consolidated statements of cash flows [Abstract]
Distributions to WES Operating unitholders				$ (912,770)	$ (1,008,572)

[1] Other assets includes $6.5 million of NGLs line-fill inventory as of September 30, 2023, and December 31, 2022. Other assets also includes $92.4 million and $60.4 million of materials and supplies inventory as of September 30, 2023, and December 31, 2022, respectively.

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

[3] Other assets includes $6.5 million of NGLs line-fill inventory as of September 30, 2023, and December 31, 2022. Other assets also includes $92.4 million and $60.4 million of materials and supplies inventory as of September 30, 2023, and December 31, 2022, respectively.

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