Consolidated Balance Sheets - WES Operating (Parenthetical) - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018
Common units issued		443,971,409	218,937,797
Common units outstanding		443,971,409	218,937,797
General partner units issued		9,060,641	0
General partner units outstanding		9,060,641	0
Accounts receivable, net	[1]	$ 260,512	$ 221,164
Other current assets	[2]	41,938	31,458
Other assets	[3]	78,202	62,792
Accrued liabilities	[4]	149,793	129,148
Other liabilities	[5]	208,346	132,130
Natural-Gas Liquids [Member]
NGLs line fill inventory		4,500	5,300
Affiliates [Member]
Accounts receivable, net		113,300	72,600
Other current assets		5,000	3,700
Other assets		60,200	42,200
Accrued liabilities		3,100	2,200
Other liabilities		$ 97,800	$ 47,800
WES Operating [Member]
General partner units issued		0	2,583,068
General partner units outstanding		0	2,583,068
Accounts receivable, net	[6]	$ 260,748	$ 221,373
Other current assets	[7]	39,914	30,583
Other assets	[8]	78,202	62,792
Accrued liabilities	[9]	149,639	127,874
Other liabilities	[10]	$ 208,346	$ 132,130
WES Operating [Member] | Common Units [Member]
Common units issued		318,675,578	152,609,285
Common units outstanding		318,675,578	152,609,285
WES Operating [Member] | Class C Units [Member]
Common units issued		0	14,372,665
Common units outstanding		0	14,372,665
WES Operating [Member] | Natural-Gas Liquids [Member]
NGLs line fill inventory		$ 4,500	$ 5,300
WES Operating [Member] | Affiliates [Member]
Accounts receivable, net		113,600	72,800
Other current assets		5,000	3,700
Other assets		60,200	42,200
Accrued liabilities		3,100	2,200
Other liabilities		$ 97,800	$ 47,800

[1] Accounts receivable, net includes amounts receivable from affiliates (as defined in Note 1) of $113.3 million and $72.6 million as of December 31, 2019 and 2018, respectively.

[2] Other current assets includes affiliate amounts of $5.0 million and $3.7 million as of December 31, 2019 and 2018, respectively.

[3] Other assets includes affiliate amounts of $60.2 million and $42.2 million as of December 31, 2019 and 2018, respectively. Other assets also includes $4.5 million and $5.3 million of NGLs line fill as of December 31, 2019 and 2018, respectively.

[4] Accrued liabilities includes affiliate amounts of $3.1 million and $2.2 million as of December 31, 2019 and 2018, respectively.

[5] Other liabilities includes affiliate amounts of $97.8 million and $47.8 million as of December 31, 2019 and 2018, respectively.

[6] Accounts receivable, net includes amounts receivable from affiliates (as defined in Note 1) of $113.6 million and $72.8 million as of December 31, 2019 and 2018, respectively.

[7] Other current assets includes affiliate amounts of $5.0 million and $3.7 million as of December 31, 2019 and 2018, respectively.

[8] Other assets includes affiliate amounts of $60.2 million and $42.2 million as of December 31, 2019 and 2018, respectively. Other assets also includes $4.5 million and $5.3 million of NGLs line fill as of December 31, 2019 and 2018, respectively.

[9] Accrued liabilities includes affiliate amounts of $3.1 million and $2.2 million as of December 31, 2019 and 2018, respectively.

[10] Other liabilities includes affiliate amounts of $97.8 million and $47.8 million as of December 31, 2019 and 2018, respectively.