Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
Revenues and Other
Revenues and other	[1]	$ 2,772,592		$ 2,746,174		$ 2,299,658
Equity income, net – related parties		226,750		237,518		195,469
Operating expenses
Cost of product		188,088		444,247		415,505
Operation and maintenance		580,874		641,219		480,861
General and administrative		155,769		114,591		67,195
Property and other taxes		68,340		61,352		51,848
Depreciation and amortization		491,086		483,255		389,164
Long-lived asset and other impairments		203,889		6,279		230,584
Goodwill impairment		441,017		0		0
Total operating expenses	[2]	2,129,063		1,750,943		1,635,157
Gain (loss) on divestiture and other, net		8,634		(1,406)		1,312
Operating income (loss)		878,913		1,231,343		861,282
Interest income – Anadarko note receivable		11,736		16,900		16,900
Interest expense		(380,058)		(303,286)		(183,831)
Gain (loss) on early extinguishment of debt		11,234		0		0
Other income (expense), net	[3]	1,025		(123,785)		(4,763)
Income (loss) before income taxes		522,850		821,172		689,588
Income tax expense (benefit)		5,998		13,472		58,934
Net income (loss)		516,852		807,700		630,654
Net income (loss) attributable to noncontrolling interests		(10,160)		110,459		79,083
Net income (loss) attributable to Western Midstream Partners, LP		527,012		697,241		551,571
Limited partners' interest in net income (loss):
Net income (loss) attributable to Western Midstream Partners, LP		527,012		697,241		551,571
Pre-acquisition net (income) loss allocated to Anadarko		0		(29,279)		(182,142)
General partner interest in net (income) loss		(11,104)		(5,637)		0
Limited partners' interest in net income (loss)	[4]	$ 515,908		$ 662,325		$ 369,429
Limited Partner [Member]
Limited partners' interest in net income (loss):
Net income (loss) per common unit - basic and diluted		$ 1.18	[4]	$ 1.59	[4]	$ 1.69
Weighted-average common units outstanding - basic and diluted		435,554		415,794		218,936
Service Revenues - Fee Based [Member]
Revenues and Other
Revenues and other		$ 2,584,323		$ 2,388,191		$ 1,905,728
Service Revenues - Product Based [Member]
Revenues and Other
Revenues and other		48,369		70,127		88,785
Product Sales [Member]
Revenues and Other
Revenues and other		138,559		286,388		303,020
Other [Member]
Revenues and Other
Revenues and other		$ 1,341		$ 1,468		$ 2,125

[1] Total revenues and other includes related-party amounts of $1.8 billion, $1.6 billion, and $1.4 billion for the years ended December 31, 2020, 2019, and 2018, respectively. See Note 6.

[2] Total operating expenses includes related-party amounts of $182.7 million, $503.2 million, and $334.2 million for the years ended December 31, 2020, 2019, and 2018, respectively. See Note 6.

[3] Other income (expense), net includes losses associated with the interest-rate swap agreements for the years ended December 31, 2019 and 2018. See Note 13.

[4] See Note 5.