Equity and Partners' Capital - Additional Information (Details) - USD ($)				1 Months Ended		12 Months Ended
		Sep. 11, 2020	Dec. 31, 2019	Mar. 31, 2021	Nov. 30, 2014	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Nov. 30, 2020	Feb. 28, 2019	May 31, 2008
Schedule of Investments [Line Items]
Common units outstanding						402,993,919	413,839,863
General partner units outstanding						9,060,641	9,060,641
Unit repurchases, authorized amount									$ 250,000,000
Unit repurchases, amount	[1]					$ 217,465,000	$ 32,535,000	$ 0
Related Parties [Member]
Schedule of Investments [Line Items]
Anadarko note receivable											$ 260,000,000
Unit repurchases, amount						$ 50,225,000	$ 0	$ 0
Anadarko [Member]
Schedule of Investments [Line Items]
Anadarko note receivable - percentage interest transferred		98.00%
Anadarko note receivable		$ 260,000,000
Public [Member]
Schedule of Investments [Line Items]
Unit repurchases, number of units						8,707,869	2,368,711
Unit repurchases, amount						$ 167,200,000	$ 32,500,000
WES [Member] | Public [Member]
Schedule of Investments [Line Items]
Common units outstanding						202,712,341
Limited partner's interest						49.20%
WES [Member] | WES [Member] | Related Parties [Member] | Limited Partner [Member]
Schedule of Investments [Line Items]
Units redeemed from a related party		27,855,398
WES [Member] | WES Operating [Member]
Schedule of Investments [Line Items]
Limited partner's interest						98.00%
Occidental [Member]
Schedule of Investments [Line Items]
Unit repurchases, number of units						2,500,000
Unit repurchases, amount						$ 50,200,000
Occidental [Member] | Limited Partner [Member]
Schedule of Investments [Line Items]
Units sold by a related party				11,500,000
Units sold by a related party, over-allotment				1,500,000
Occidental [Member] | WES [Member]
Schedule of Investments [Line Items]
Common units outstanding						200,281,578
Limited partner's interest						48.60%
General partner units outstanding						9,060,641
General partner's interest			2.00%			2.20%
Occidental [Member] | WES Operating [Member]
Schedule of Investments [Line Items]
Limited partner's interest						2.00%
WES Operating [Member]
Schedule of Investments [Line Items]
Common units outstanding						318,675,578	318,675,578
WES Operating [Member] | Class C Units [Member]
Schedule of Investments [Line Items]
Class C units, common units issued upon conversion										1
WES Operating [Member] | Related Parties [Member] | Class C Units [Member]
Schedule of Investments [Line Items]
Class C units, number of units issued					10,913,853

[1] Includes unit repurchases from Occidental of $50.2 million for the year ended December 31, 2021. See Note 5.