Western Midstream Partners 10-Q 10 May 22 2022 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2022	May 02, 2022
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity Registrant Name	WESTERN MIDSTREAM PARTNERS, LP
Entity File Number	001-35753
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	46-0967367
Entity Address, Address Line One	9950 Woodloch Forest Drive, Suite 2800
Entity Address, City or Town	The Woodlands,
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77380
City Area Code	(346)
Local Phone Number	786-5000
Title of 12(b) Security	Common units
Trading Symbol	WES
Security Exchange Name	NYSE
Entity Common Units Outstanding		403,333,810
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0001423902
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
WES Operating [Member]
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity Registrant Name	WESTERN MIDSTREAM OPERATING, LP
Entity File Number	001-34046
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-1075808
Entity Address, Address Line One	9950 Woodloch Forest Drive, Suite 2800
Entity Address, City or Town	The Woodlands,
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77380
City Area Code	(346)
Local Phone Number	786-5000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0001414475
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Revenues and other
Revenues and other	[1]	$ 758,297	$ 674,974
Equity income, net – related parties		49,607	52,165
Operating expenses
Cost of product		72,848	88,969
Operation and maintenance		128,976	140,332
General and administrative		48,602	45,116
Property and other taxes		18,442	14,384
Depreciation and amortization		134,582	130,553
Long-lived asset and other impairments		0	14,866
Total operating expenses	[2]	403,450	434,220
Gain (loss) on divestiture and other, net		370	(583)
Operating income (loss)		404,824	292,336
Interest expense		(85,455)	(98,493)
Gain (loss) on early extinguishment of debt		0	(289)
Other income (expense), net		106	(1,207)
Income (loss) before income taxes		319,475	192,347
Income tax expense (benefit)		1,805	1,112
Net income (loss)		317,670	191,235
Net income (loss) attributable to noncontrolling interests		8,953	5,444
Net income (loss) attributable to Western Midstream Partners, LP		308,717	185,791
Limited partners' interest in net income (loss):
Net income (loss) attributable to Western Midstream Partners, LP		308,717	185,791
General partner interest in net (income) loss		(6,783)	(3,993)
Limited partners' interest in net income (loss)	[3]	$ 301,934	$ 181,798
Net income (loss) per common unit - basic	[3]	$ 0.75	$ 0.44
Net income (loss) per common unit - diluted	[3]	$ 0.75	$ 0.44
Weighted-average common units outstanding - basic	[3]	403,254	413,104
Weighted-average common units outstanding - diluted	[3]	404,460	413,446
Service Revenues - Fee Based [Member]
Revenues and other
Revenues and other		$ 631,598	$ 572,275
Service Revenues - Product Based [Member]
Revenues and other
Revenues and other		40,867	31,652
Product Sales [Member]
Revenues and other
Revenues and other		85,589	70,805
Other [Member]
Revenues and other
Revenues and other		$ 243	$ 242
[1]	Total revenues and other includes related-party amounts of $428.7 million and $378.3 million for the three months ended March 31, 2022 and 2021, respectively. See Note 5 .
[2]	Total operating expenses includes related-party amounts of $(17.6) million and $39.9 million for the three months ended March 31, 2022 and 2021, respectively. See Note 5 .
[3]	See Note 4.

Consolidated Statements of Op_2

Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Total revenues and other	[1]	$ 758,297	$ 674,974
Total operating expenses	[2]	403,450	434,220
Related Parties [Member]
Total revenues and other		428,709	378,251
Total operating expenses		$ (17,627)	$ 39,862
[1]	Total revenues and other includes related-party amounts of $428.7 million and $378.3 million for the three months ended March 31, 2022 and 2021, respectively. See Note 5 .
[2]	Total operating expenses includes related-party amounts of $(17.6) million and $39.9 million for the three months ended March 31, 2022 and 2021, respectively. See Note 5 .

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents		$ 248,249	$ 201,999
Accounts receivable, net		601,647	436,513
Other current assets		56,397	46,252
Total current assets		906,293	684,764
Property, plant, and equipment
Cost		12,930,358	12,846,078
Less accumulated depreciation		4,455,162	4,333,171
Net property, plant, and equipment		8,475,196	8,512,907
Goodwill		4,783	4,783
Other intangible assets		736,825	744,742
Equity investments		1,163,069	1,167,187
Other assets	[1]	159,707	158,696
Total assets	[2]	11,445,873	11,273,079
Current liabilities
Accounts and imbalance payables		395,893	326,061
Short-term debt		718,153	505,932
Accrued ad valorem taxes		62,833	44,955
Accrued liabilities		160,247	263,249
Total current liabilities		1,337,126	1,140,197
Long-term liabilities
Long-term debt		6,188,750	6,400,616
Deferred income taxes		13,557	12,425
Asset retirement obligations		297,187	298,275
Other liabilities		338,446	325,806
Total long-term liabilities		6,837,940	7,037,122
Total liabilities	[3]	8,175,066	8,177,319
Equity and partners' capital
Common units (403,333,810 and 402,993,919 units issued and outstanding at March 31, 2022, and December 31, 2021, respectively)		3,134,018	2,966,955
General partner units (9,060,641 units issued and outstanding at March 31, 2022, and December 31, 2021)		(5,062)	(8,882)
Total partners' capital		3,128,956	2,958,073
Noncontrolling interests		141,851	137,687
Total equity and partners' capital		3,270,807	3,095,760
Total liabilities, equity, and partners' capital		$ 11,445,873	$ 11,273,079
Common units issued		403,333,810	402,993,919
Common units outstanding		403,333,810	402,993,919
General partner units issued		9,060,641	9,060,641
General partner units outstanding		9,060,641	9,060,641
[1]	Other assets includes $14.6 million and $9.8 million of NGLs line - fill inventory as of March 31, 2022, and December 31, 2021, respectively. Other assets also includes $51.9 million and $56.2 million of materials and supplies inventory as of March 31, 2022, and December 31, 2021, respectively.
[2]	Total assets includes related - party amounts of $1.5 billion and $1.4 billion as of March 31, 2022, and December 31, 2021, respectively, which includes related - party Accounts receivable, net of $274.2 million and $180.2 million as of March 31, 2022, and December 31, 2021, respectively. See Note 5 .
[3]	Total liabilities includes related - party amounts of $275.7 million and $270.5 million as of March 31, 2022, and December 31, 2021, respectively. See Note 5 .

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Materials and supplies inventory		$ 51,900	$ 56,200
Total assets	[1]	11,445,873	11,273,079
Accounts receivable, net		601,647	436,513
Total liabilities	[2]	8,175,066	8,177,319
Related Parties [Member]
Total assets		1,512,669	1,405,376
Accounts receivable, net		274,222	180,205
Total liabilities		275,729	270,521
Natural-Gas Liquids [Member]
NGLs line-fill inventory		$ 14,600	$ 9,800
[1]	Total assets includes related - party amounts of $1.5 billion and $1.4 billion as of March 31, 2022, and December 31, 2021, respectively, which includes related - party Accounts receivable, net of $274.2 million and $180.2 million as of March 31, 2022, and December 31, 2021, respectively. See Note 5 .
[2]	Total liabilities includes related - party amounts of $275.7 million and $270.5 million as of March 31, 2022, and December 31, 2021, respectively. See Note 5 .

Consolidated Statements of Equi

Consolidated Statements of Equity and Partners' Capital - USD ($) $ in Thousands		Total	Occidental [Member]	Chipeta [Member]	WES Operating [Member]	Common Units [Member]	Common Units [Member]Occidental [Member]	General Partner [Member]	Noncontrolling Interests [Member]	Noncontrolling Interests [Member]Chipeta [Member]	Noncontrolling Interests [Member]WES Operating [Member]
Balance at Dec. 31, 2020		$ 2,895,212				$ 2,778,339		$ (17,208)	$ 134,081
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)		191,235				181,798		3,993	5,444
Distributions to noncontrolling interest owners				$ (276)	$ (2,551)					$ (276)	$ (2,551)
Distributions to Partnership unitholders		(131,265)				(128,447)		(2,818)
Unit repurchases	[1]	(16,241)				(16,241)
Contributions of equity-based compensation from related parties			$ 3,210				$ 3,210
Equity-based compensation expense		3,524				3,524
Net contributions from (distributions to) related parties		1,627				1,627
Other		(2,355)				(2,355)
Balance at Mar. 31, 2021		2,942,120				2,821,455		(16,033)	136,698
Balance at Dec. 31, 2021		3,095,760				2,966,955		(8,882)	137,687
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)		317,670				301,934		6,783	8,953
Distributions to noncontrolling interest owners				$ (1,984)	$ (2,805)					$ (1,984)	$ (2,805)
Distributions to Partnership unitholders		(134,749)				(131,786)		(2,963)
Unit repurchases	[1]	(5,149)				(5,149)
Contributions of equity-based compensation from related parties			$ 1,949				$ 1,949
Equity-based compensation expense		5,794				5,794
Net contributions from (distributions to) related parties		409				409
Other		(6,088)				(6,088)
Balance at Mar. 31, 2022		$ 3,270,807				$ 3,134,018		$ (5,062)	$ 141,851
[1]	See Note 4 .

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities
Net income (loss)		$ 317,670	$ 191,235
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization		134,582	130,553
Long-lived asset and other impairments		0	14,866
Non-cash equity-based compensation expense		7,743	6,734
Deferred income taxes		1,132	557
Accretion and amortization of long-term obligations, net		1,782	2,088
Equity income, net – related parties		(49,607)	(52,165)
Distributions from equity-investment earnings – related parties		45,870	49,048
(Gain) loss on divestiture and other, net		(370)	583
(Gain) loss on early extinguishment of debt		0	289
Other		0	11
Changes in assets and liabilities:
(Increase) decrease in accounts receivable, net		(165,134)	(30,182)
Increase (decrease) in accounts and imbalance payables and accrued liabilities, net		(14,292)	(16,467)
Change in other items, net		(2,918)	(35,600)
Net cash provided by operating activities		276,458	261,550
Cash flows from investing activities
Capital expenditures	[1]	(83,971)	(61,783)
Contributions to equity investments – related parties		(2,070)	(86)
Distributions from equity investments in excess of cumulative earnings – related parties		9,925	12,141
Proceeds from the sale of assets to third parties		383	0
(Increase) decrease in materials and supplies inventory and other		4,116	3,256
Net cash used in investing activities		(71,617)	(46,472)
Cash flows from financing activities
Borrowings, net of debt issuance costs		0	100,000
Repayments of debt		0	(531,085)
Increase (decrease) in outstanding checks		(7,088)	(22,017)
Distributions to Partnership unitholders	[2]	(134,749)	(131,265)
Net contributions from (distributions to) related parties		409	1,627
Unit repurchases		(5,149)	(16,241)
Other		(7,225)	(1,816)
Net cash provided by (used in) financing activities		(158,591)	(603,624)
Net increase (decrease) in cash and cash equivalents		46,250	(388,546)
Cash and cash equivalents at beginning of period		201,999	444,922
Cash and cash equivalents at end of period		248,249	56,376
Supplemental disclosures
Interest paid, net of capitalized interest		149,289	153,979
Income taxes paid (reimbursements received)		905	932
Accrued capital expenditures		36,821	22,964
Chipeta [Member]
Cash flows from financing activities
Distributions to Chipeta noncontrolling interest owner		(1,984)	(276)
WES Operating [Member]
Cash flows from financing activities
Distributions to noncontrolling interest owner of WES Operating		$ (2,805)	$ (2,551)
[1]	Includes purchases from related parties of $2.0 million for the three months ended March 31, 2021. See Note 5 .
[2]	See Note 5 .

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Capital expenditures	[1]	$ 83,971	$ 61,783
Related Parties [Member]
Capital expenditures		$ 0	$ 2,000
[1]	Includes purchases from related parties of $2.0 million for the three months ended March 31, 2021. See Note 5 .

Consolidated Statements of Op_3

Consolidated Statements of Operations - WES Operating - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Revenues and other
Revenues and other	[1]	$ 758,297	$ 674,974
Equity income, net – related parties		49,607	52,165
Operating expenses
Cost of product		72,848	88,969
Operation and maintenance		128,976	140,332
General and administrative		48,602	45,116
Property and other taxes		18,442	14,384
Depreciation and amortization		134,582	130,553
Long-lived asset and other impairments		0	14,866
Total operating expenses	[2]	403,450	434,220
Gain (loss) on divestiture and other, net		370	(583)
Operating income (loss)		404,824	292,336
Interest expense		(85,455)	(98,493)
Gain (loss) on early extinguishment of debt		0	(289)
Other income (expense), net		106	(1,207)
Income (loss) before income taxes		319,475	192,347
Income tax expense (benefit)		1,805	1,112
Net income (loss)		317,670	191,235
Net income (loss) attributable to noncontrolling interest		8,953	5,444
Net income (loss) attributable to Western Midstream Operating, LP		308,717	185,791
Service Revenues - Fee Based [Member]
Revenues and other
Revenues and other		631,598	572,275
Service Revenues - Product Based [Member]
Revenues and other
Revenues and other		40,867	31,652
Product Sales [Member]
Revenues and other
Revenues and other		85,589	70,805
Other [Member]
Revenues and other
Revenues and other		243	242
WES Operating [Member]
Revenues and other
Revenues and other	[3]	758,297	674,974
Equity income, net – related parties		49,607	52,165
Operating expenses
Cost of product		72,848	88,969
Operation and maintenance		128,976	140,332
General and administrative		47,861	44,230
Property and other taxes		18,442	14,384
Depreciation and amortization		134,582	130,553
Long-lived asset and other impairments		0	14,866
Total operating expenses	[4]	402,709	433,334
Gain (loss) on divestiture and other, net		370	(583)
Operating income (loss)		405,565	293,222
Interest expense		(85,455)	(98,493)
Gain (loss) on early extinguishment of debt		0	(289)
Other income (expense), net		103	(1,210)
Income (loss) before income taxes		320,213	193,230
Income tax expense (benefit)		1,805	1,112
Net income (loss)		318,408	192,118
Net income (loss) attributable to noncontrolling interest		2,636	1,633
Net income (loss) attributable to Western Midstream Operating, LP		315,772	190,485
WES Operating [Member] | Service Revenues - Fee Based [Member]
Revenues and other
Revenues and other		631,598	572,275
WES Operating [Member] | Service Revenues - Product Based [Member]
Revenues and other
Revenues and other		40,867	31,652
WES Operating [Member] | Product Sales [Member]
Revenues and other
Revenues and other		85,589	70,805
WES Operating [Member] | Other [Member]
Revenues and other
Revenues and other		$ 243	$ 242
[1]	Total revenues and other includes related-party amounts of $428.7 million and $378.3 million for the three months ended March 31, 2022 and 2021, respectively. See Note 5 .
[2]	Total operating expenses includes related-party amounts of $(17.6) million and $39.9 million for the three months ended March 31, 2022 and 2021, respectively. See Note 5 .
[3]	Total revenues and other includes related - party amounts of $428.7 million and $378.3 million for the three months ended March 31, 2022 and 2021, respectively. See Note 5 .
[4]	Total operating expenses includes related - party amounts of $(16.7) million and $40.4 million for the three months ended March 31, 2022 and 2021, respectively. See Note 5 .

Consolidated Statements of Op_4

Consolidated Statements of Operations - WES Operating (Parenthetical) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Total revenues and other	[1]	$ 758,297	$ 674,974
Total operating expenses	[2]	403,450	434,220
Related Parties [Member]
Total revenues and other		428,709	378,251
Total operating expenses		(17,627)	39,862
WES Operating [Member]
Total revenues and other	[3]	758,297	674,974
Total operating expenses	[4]	402,709	433,334
WES Operating [Member] | Related Parties [Member]
Total revenues and other		428,700	378,300
Total operating expenses		$ (16,700)	$ 40,400
[1]	Total revenues and other includes related-party amounts of $428.7 million and $378.3 million for the three months ended March 31, 2022 and 2021, respectively. See Note 5 .
[2]	Total operating expenses includes related-party amounts of $(17.6) million and $39.9 million for the three months ended March 31, 2022 and 2021, respectively. See Note 5 .
[3]	Total revenues and other includes related - party amounts of $428.7 million and $378.3 million for the three months ended March 31, 2022 and 2021, respectively. See Note 5 .
[4]	Total operating expenses includes related - party amounts of $(16.7) million and $40.4 million for the three months ended March 31, 2022 and 2021, respectively. See Note 5 .

Consolidated Balance Sheets - W

Consolidated Balance Sheets - WES Operating - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents		$ 248,249	$ 201,999
Accounts receivable, net		601,647	436,513
Other current assets		56,397	46,252
Total current assets		906,293	684,764
Property, plant, and equipment
Cost		12,930,358	12,846,078
Less accumulated depreciation		4,455,162	4,333,171
Net property, plant, and equipment		8,475,196	8,512,907
Goodwill		4,783	4,783
Other intangible assets		736,825	744,742
Equity investments		1,163,069	1,167,187
Other assets	[1]	159,707	158,696
Total assets	[2]	11,445,873	11,273,079
Current liabilities
Accounts and imbalance payables		395,893	326,061
Short-term debt		718,153	505,932
Accrued ad valorem taxes		62,833	44,955
Accrued liabilities		160,247	263,249
Total current liabilities		1,337,126	1,140,197
Long-term liabilities
Long-term debt		6,188,750	6,400,616
Deferred income taxes		13,557	12,425
Asset retirement obligations		297,187	298,275
Other liabilities		338,446	325,806
Total long-term liabilities		6,837,940	7,037,122
Total liabilities	[3]	8,175,066	8,177,319
Equity and partners' capital
Common units (318,675,578 units issued and outstanding at March 31, 2022, and December 31, 2021)		3,134,018	2,966,955
Total partners' capital		3,128,956	2,958,073
Noncontrolling interest		141,851	137,687
Total equity and partners' capital		3,270,807	3,095,760
Total liabilities, equity, and partners' capital		$ 11,445,873	$ 11,273,079
Common units issued		403,333,810	402,993,919
Common units outstanding		403,333,810	402,993,919
WES Operating [Member]
Current assets
Cash and cash equivalents		$ 244,213	$ 195,598
Accounts receivable, net		601,647	436,513
Other current assets		55,023	44,421
Total current assets		900,883	676,532
Property, plant, and equipment
Cost		12,930,358	12,846,078
Less accumulated depreciation		4,455,162	4,333,171
Net property, plant, and equipment		8,475,196	8,512,907
Goodwill		4,783	4,783
Other intangible assets		736,825	744,742
Equity investments		1,163,069	1,167,187
Other assets	[4]	158,795	158,696
Total assets	[5]	11,439,551	11,264,847
Current liabilities
Accounts and imbalance payables		412,221	374,443
Short-term debt		718,153	505,932
Accrued ad valorem taxes		62,833	44,955
Accrued liabilities		132,309	210,693
Total current liabilities		1,325,516	1,136,023
Long-term liabilities
Long-term debt		6,188,750	6,400,616
Deferred income taxes		13,557	12,425
Asset retirement obligations		297,187	298,275
Other liabilities		337,647	324,842
Total long-term liabilities		6,837,141	7,036,158
Total liabilities	[6]	8,162,657	8,172,181
Equity and partners' capital
Common units (318,675,578 units issued and outstanding at March 31, 2022, and December 31, 2021)		3,246,865	3,063,289
Total partners' capital		3,246,865	3,063,289
Noncontrolling interest		30,029	29,377
Total equity and partners' capital		3,276,894	3,092,666
Total liabilities, equity, and partners' capital		$ 11,439,551	$ 11,264,847
Common units issued		318,675,578	318,675,578
Common units outstanding		318,675,578	318,675,578
[1]	Other assets includes $14.6 million and $9.8 million of NGLs line - fill inventory as of March 31, 2022, and December 31, 2021, respectively. Other assets also includes $51.9 million and $56.2 million of materials and supplies inventory as of March 31, 2022, and December 31, 2021, respectively.
[2]	Total assets includes related - party amounts of $1.5 billion and $1.4 billion as of March 31, 2022, and December 31, 2021, respectively, which includes related - party Accounts receivable, net of $274.2 million and $180.2 million as of March 31, 2022, and December 31, 2021, respectively. See Note 5 .
[3]	Total liabilities includes related - party amounts of $275.7 million and $270.5 million as of March 31, 2022, and December 31, 2021, respectively. See Note 5 .
[4]	Other assets includes $14.6 million and $9.8 million of NGLs line - fill inventory as of March 31, 2022, and December 31, 2021, respectively. Other assets also includes $51.9 million and $56.2 million of materials and supplies inventory as of March 31, 2022, and December 31, 2021, respectively.
[5]	Total assets includes related - party amounts of $1.5 billion and $1.4 billion as of March 31, 2022, and December 31, 2021, respectively, which includes related - party Accounts receivable, net of $274.2 million and $180.2 million as of March 31, 2022, and December 31, 2021, respectively. See Note 5 .
[6]	Total liabilities includes related - party amounts of $292.3 million and $318.7 million as of March 31, 2022, and December 31, 2021, respectively. See Note 5 .

Consolidated Balance Sheets -_2

Consolidated Balance Sheets - WES Operating (Parenthetical) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Materials and supplies inventory		$ 51,900	$ 56,200
Total assets	[1]	11,445,873	11,273,079
Accounts receivable, net		601,647	436,513
Total liabilities	[2]	8,175,066	8,177,319
Related Parties [Member]
Total assets		1,512,669	1,405,376
Accounts receivable, net		274,222	180,205
Total liabilities		275,729	270,521
Natural-Gas Liquids [Member]
NGLs line-fill inventory		14,600	9,800
WES Operating [Member]
Materials and supplies inventory		51,900	56,200
Total assets	[3]	11,439,551	11,264,847
Accounts receivable, net		601,647	436,513
Total liabilities	[4]	8,162,657	8,172,181
WES Operating [Member] | Related Parties [Member]
Total assets		1,500,000	1,400,000
Accounts receivable, net		274,200	180,200
Total liabilities		292,300	318,700
WES Operating [Member] | Natural-Gas Liquids [Member]
NGLs line-fill inventory		$ 14,600	$ 9,800
[1]	Total assets includes related - party amounts of $1.5 billion and $1.4 billion as of March 31, 2022, and December 31, 2021, respectively, which includes related - party Accounts receivable, net of $274.2 million and $180.2 million as of March 31, 2022, and December 31, 2021, respectively. See Note 5 .
[2]	Total liabilities includes related - party amounts of $275.7 million and $270.5 million as of March 31, 2022, and December 31, 2021, respectively. See Note 5 .
[3]	Total assets includes related - party amounts of $1.5 billion and $1.4 billion as of March 31, 2022, and December 31, 2021, respectively, which includes related - party Accounts receivable, net of $274.2 million and $180.2 million as of March 31, 2022, and December 31, 2021, respectively. See Note 5 .
[4]	Total liabilities includes related - party amounts of $292.3 million and $318.7 million as of March 31, 2022, and December 31, 2021, respectively. See Note 5 .

Consolidated Statements of Eq_2

Consolidated Statements of Equity and Partners' Capital - WES Operating - USD ($) $ in Thousands	Total	Occidental [Member]	Chipeta [Member]	Common Units [Member]	Common Units [Member]Occidental [Member]	Noncontrolling Interest [Member]	Noncontrolling Interest [Member]Chipeta [Member]	WES Operating [Member]	WES Operating [Member]Occidental [Member]	WES Operating [Member]WES [Member]	WES Operating [Member]Chipeta [Member]	WES Operating [Member]Common Units [Member]	WES Operating [Member]Common Units [Member]Occidental [Member]	WES Operating [Member]Common Units [Member]WES [Member]	WES Operating [Member]Noncontrolling Interest [Member]	WES Operating [Member]Noncontrolling Interest [Member]Chipeta [Member]
Balance at Dec. 31, 2020	$ 2,895,212			$ 2,778,339		$ 134,081		$ 2,860,751				$ 2,831,199			$ 29,552
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	191,235			181,798		5,444		192,118				190,485			1,633
Distributions to noncontrolling interest owners			$ (276)				$ (276)				$ (276)					$ (276)
Distributions to WES Operating unitholders	(131,265)			(128,447)				(127,470)				(127,470)
Contributions of equity-based compensation from related parties		$ 3,210			$ 3,210				$ 3,210	$ 10,826			$ 3,210	$ 10,826
Net contributions from (distributions to) related parties	1,627			1,627				1,627				1,627
Balance at Mar. 31, 2021	2,942,120			2,821,455		136,698		2,940,786				2,909,877			30,909
Balance at Dec. 31, 2021	3,095,760			2,966,955		137,687		3,092,666				3,063,289			29,377
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	317,670			301,934		8,953		318,408				315,772			2,636
Distributions to noncontrolling interest owners			$ (1,984)				$ (1,984)				$ (1,984)					$ (1,984)
Distributions to WES Operating unitholders	(134,749)			(131,786)				(140,217)				(140,217)
Contributions of equity-based compensation from related parties		$ 1,949			$ 1,949				$ 1,949	$ 5,663			$ 1,949	$ 5,663
Net contributions from (distributions to) related parties	409			409				409				409
Balance at Mar. 31, 2022	$ 3,270,807			$ 3,134,018		$ 141,851		$ 3,276,894				$ 3,246,865			$ 30,029

Consolidated Statements of Ca_3

Consolidated Statements of Cash Flows - WES Operating - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities
Net income (loss)		$ 317,670	$ 191,235
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization		134,582	130,553
Long-lived asset and other impairments		0	14,866
Non-cash equity-based compensation expense		7,743	6,734
Deferred income taxes		1,132	557
Accretion and amortization of long-term obligations, net		1,782	2,088
Equity income, net – related parties		(49,607)	(52,165)
Distributions from equity-investment earnings – related parties		45,870	49,048
(Gain) loss on divestiture and other, net		(370)	583
(Gain) loss on early extinguishment of debt		0	289
Other		0	11
Changes in assets and liabilities:
(Increase) decrease in accounts receivable, net		(165,134)	(30,182)
Increase (decrease) in accounts and imbalance payables and accrued liabilities, net		(14,292)	(16,467)
Change in other items, net		(2,918)	(35,600)
Net cash provided by operating activities		276,458	261,550
Cash flows from investing activities
Capital expenditures	[1]	(83,971)	(61,783)
Contributions to equity investments – related parties		(2,070)	(86)
Distributions from equity investments in excess of cumulative earnings – related parties		9,925	12,141
Proceeds from the sale of assets to third parties		383	0
(Increase) decrease in materials and supplies inventory and other		4,116	3,256
Net cash used in investing activities		(71,617)	(46,472)
Cash flows from financing activities
Borrowings, net of debt issuance costs		0	100,000
Repayments of debt		0	(531,085)
Increase (decrease) in outstanding checks		(7,088)	(22,017)
Distributions to WES Operating unitholders	[2]	(134,749)	(131,265)
Net contributions from (distributions to) related parties		409	1,627
Other		(7,225)	(1,816)
Net cash provided by (used in) financing activities		(158,591)	(603,624)
Net increase (decrease) in cash and cash equivalents		46,250	(388,546)
Cash and cash equivalents at beginning of period		201,999	444,922
Cash and cash equivalents at end of period		248,249	56,376
Supplemental disclosures
Interest paid, net of capitalized interest		149,289	153,979
Income taxes paid (reimbursements received)		905	932
Accrued capital expenditures		36,821	22,964
Chipeta [Member]
Cash flows from financing activities
Distributions to Chipeta noncontrolling interest owner		(1,984)	(276)
WES Operating [Member]
Cash flows from operating activities
Net income (loss)		318,408	192,118
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization		134,582	130,553
Long-lived asset and other impairments		0	14,866
Non-cash equity-based compensation expense		7,612	14,036
Deferred income taxes		1,132	557
Accretion and amortization of long-term obligations, net		1,782	2,088
Equity income, net – related parties		(49,607)	(52,165)
Distributions from equity-investment earnings – related parties		45,870	49,048
(Gain) loss on divestiture and other, net		(370)	583
(Gain) loss on early extinguishment of debt		0	289
Other		0	11
Changes in assets and liabilities:
(Increase) decrease in accounts receivable, net		(165,134)	(50,540)
Increase (decrease) in accounts and imbalance payables and accrued liabilities, net		(21,864)	(3,748)
Change in other items, net		(2,294)	(36,028)
Net cash provided by operating activities		270,117	261,668
Cash flows from investing activities
Capital expenditures	[3]	(83,971)	(61,783)
Contributions to equity investments – related parties		(2,070)	(86)
Distributions from equity investments in excess of cumulative earnings – related parties		9,925	12,141
Proceeds from the sale of assets to third parties		383	0
(Increase) decrease in materials and supplies inventory and other		4,116	3,256
Net cash used in investing activities		(71,617)	(46,472)
Cash flows from financing activities
Borrowings, net of debt issuance costs		0	100,000
Repayments of debt		0	(531,085)
Increase (decrease) in outstanding checks		(6,953)	(22,209)
Distributions to WES Operating unitholders	[2]	(140,217)	(127,470)
Net contributions from (distributions to) related parties		409	1,627
Other		(1,140)	(1,816)
Net cash provided by (used in) financing activities		(149,885)	(581,229)
Net increase (decrease) in cash and cash equivalents		48,615	(366,033)
Cash and cash equivalents at beginning of period		195,598	418,537
Cash and cash equivalents at end of period		244,213	52,504
Supplemental disclosures
Interest paid, net of capitalized interest		149,289	153,979
Income taxes paid (reimbursements received)		905	932
Accrued capital expenditures		36,821	22,964
WES Operating [Member] | Chipeta [Member]
Cash flows from financing activities
Distributions to Chipeta noncontrolling interest owner		$ (1,984)	$ (276)
[1]	Includes purchases from related parties of $2.0 million for the three months ended March 31, 2021. See Note 5 .
[2]	See Note 5 .
[3]	Includes purchases from related parties of $2.0 million for the three months ended March 31, 2021. See Note 5 .

Consolidated Statements of Ca_4

Consolidated Statements of Cash Flows - WES Operating (Parenthetical) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Capital expenditures	[1]	$ 83,971	$ 61,783
WES Operating [Member]
Capital expenditures	[2]	83,971	61,783
Related Parties [Member]
Capital expenditures		$ 0	2,000
Related Parties [Member] | WES Operating [Member]
Capital expenditures			$ 2,000
[1]	Includes purchases from related parties of $2.0 million for the three months ended March 31, 2021. See Note 5 .
[2]	Includes purchases from related parties of $2.0 million for the three months ended March 31, 2021. See Note 5 .

Description of Business and Bas

Description of Business and Basis of Presentation	3 Months Ended
	Mar. 31, 2022
Accounting Policies [Abstract]
Description of Business and Basis of Presentation	1. DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION General. Western Midstream Partners, LP is a Delaware master limited partnership formed in September 2012. Western Midstream Operating, LP (together with its subsidiaries, “WES Operating”) is a Delaware limited partnership formed in 2007 to acquire, own, develop, and operate midstream assets. Western Midstream Partners, LP owns, directly and indirectly, a 98.0% limited partner interest in WES Operating, and directly owns all of the outstanding equity interests of Western Midstream Operating GP, LLC, which holds the entire non - economic general partner interest in WES Operating. For purposes of these consolidated financial statements, the “Partnership” refers to Western Midstream Partners, LP in its individual capacity or to Western Midstream Partners, LP and its subsidiaries, including Western Midstream Operating GP, LLC and WES Operating, as the context requires. “WES Operating GP” refers to Western Midstream Operating GP, LLC, individually as the general partner of WES Operating. The Partnership’s general partner, Western Midstream Holdings, LLC (the “general partner”), is a wholly owned subsidiary of Occidental Petroleum Corporation. “Occidental” refers to Occidental Petroleum Corporation, as the context requires, and its subsidiaries, excluding the general partner. “Anadarko” refers to Anadarko Petroleum Corporation and its subsidiaries, excluding Western Midstream Holdings, LLC. Anadarko became a wholly owned subsidiary of Occidental as a result of Occidental’s acquisition by merger of Anadarko on August 8, 2019. “Related parties” refers to Occidental (see Note 5 ), the Partnership’s investments accounted for under the equity method of accounting (see Note 6 ), and the Partnership and WES Operating for transactions that eliminate upon consolidation (see Note 5 ). The Partnership is engaged in the business of gathering, compressing, treating, processing, and transporting natural gas; gathering, stabilizing, and transporting condensate, natural - gas liquids (“NGLs”), and crude oil; and gathering and disposing of produced water. In its capacity as a natural - gas processor, the Partnership also buys and sells natural gas, NGLs, and condensate on behalf of itself and as an agent for its customers under certain contracts. As of March 31, 2022, the Partnership’s assets and investments consisted of the following: Wholly Operated Non-Operated Equity Gathering systems (1) 17 2 3 1 Treating facilities 37 3 — — Natural - gas processing plants/trains 24 3 — 5 NGLs pipelines 2 — — 5 Natural - gas pipelines 5 — — 1 Crude - oil pipelines 3 1 — 4 _________________________________________________________________________________________ (1) Includes the DBM water systems. These assets and investments are located in Texas, New Mexico, the Rocky Mountains (Colorado, Utah, and Wyoming), and North - central Pennsylvania. 1. DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION Basis of presentation. The consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) and include the accounts of the Partnership and entities in which it holds a controlling financial interest, including WES Operating, WES Operating GP, proportionately consolidated interests, and equity investments (see table below). All significant intercompany transactions have been eliminated. The following table outlines the ownership interests and the accounting method of consolidation used in the consolidated financial statements for entities not wholly owned: Percentage Interest Full consolidation Chipeta (1) 75.00 % Proportionate consolidation (2) Springfield system 50.10 % Marcellus Interest systems 33.75 % Equity investments (3) Mi Vida JV LLC (“Mi Vida”) 50.00 % Ranch Westex JV LLC (“Ranch Westex”) 50.00 % Front Range Pipeline LLC (“FRP”) 33.33 % Red Bluff Express Pipeline, LLC (“Red Bluff Express”) 30.00 % Enterprise EF78 LLC (“Mont Belvieu JV”) 25.00 % Rendezvous Gas Services, LLC (“Rendezvous”) 22.00 % Texas Express Pipeline LLC (“TEP”) 20.00 % Texas Express Gathering LLC (“TEG”) 20.00 % Whitethorn Pipeline Company LLC (“Whitethorn LLC”) 20.00 % Saddlehorn Pipeline Company, LLC (“Saddlehorn”) 20.00 % Cactus II Pipeline LLC (“Cactus II”) 15.00 % Panola Pipeline Company, LLC (“Panola”) 15.00 % White Cliffs Pipeline, LLC (“White Cliffs”) 10.00 % _________________________________________________________________________________________ (1) The 25% third - party interest in Chipeta Processing LLC (“Chipeta”) is reflected within noncontrolling interests in the consolidated financial statements. See Noncontrolling interests below. (2) The Partnership proportionately consolidates its associated share of the assets, liabilities, revenues, and expenses attributable to these assets. (3) Investments in non - controlled entities over which the Partnership exercises significant influence are accounted for under the equity method of accounting. “Equity - investment throughput” refers to the Partnership’s share of average throughput for these investments. Certain information and note disclosures commonly included in annual financial statements have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Accordingly, the accompanying consolidated financial statements and notes should be read in conjunction with the Partnership’s 2021 Form 10-K, as filed with the SEC on February 23, 2022. Management believes that the disclosures made are adequate to make the information not misleading. 1. DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION The consolidated financial results of WES Operating are included in the Partnership’s consolidated financial statements. Throughout these notes to consolidated financial statements, and to the extent material, any differences between the consolidated financial results of the Partnership and WES Operating are discussed separately. The Partnership’s consolidated financial statements differ from those of WES Operating primarily as a result of (i) the presentation of noncontrolling interest ownership (see Noncontrolling interests below), (ii) the elimination of WES Operating GP’s investment in WES Operating with WES Operating GP’s underlying capital account, (iii) the general and administrative expenses incurred by the Partnership, which are separate from, and in addition to, those incurred by WES Operating, (iv) the inclusion of the impact of Partnership equity balances and Partnership distributions, and (v) transactions between the Partnership and WES Operating that eliminate upon consolidation. Presentation of the Partnership’s assets. The Partnership’s assets include assets owned and ownership interests accounted for by the Partnership under the equity method of accounting, through its 98.0% partnership interest in WES Operating, as of March 31, 2022 (see Note 6 ). The Partnership also owns and controls the entire non - economic general partner interest in WES Operating GP, and the Partnership’s general partner is owned by Occidental. Use of estimates. In preparing financial statements in accordance with GAAP, management makes informed judgments and estimates that affect the reported amounts of assets, liabilities, revenues, and expenses. Management evaluates its estimates and related assumptions regularly, using historical experience and other reasonable methods. Changes in facts and circumstances or additional information may result in revised estimates, and actual results may differ from these estimates. Effects on the business, financial condition, and results of operations resulting from revisions to estimates are recognized when the facts that give rise to the revisions become known. The information included herein reflects all normal recurring adjustments which are, in the opinion of management, necessary for a fair presentation of the consolidated financial statements, and certain prior-period amounts have been reclassified to conform to the current-year presentation. Noncontrolling interests. The Partnership’s noncontrolling interests in the consolidated financial statements consist of (i) the 25% third - party interest in Chipeta and (ii) the 2.0% Occidental subsidiary - owned limited partner interest in WES Operating. WES Operating’s noncontrolling interest in the consolidated financial statements consists of the 25% third - party interest in Chipeta. See Note 4. Segments. The Partnership’s operations continue to be organized into a single operating segment, the assets of which gather, compress, treat, process, and transport natural gas; gather, stabilize, and transport condensate, NGLs, and crude oil; and gather and dispose of produced water in the United States. Equity-based compensation. During the three months ended March 31, 2022, the Partnership issued 565,246 common units under its long-term incentive plans. Compensation expense was $5.8 million and $3.5 million for the three months ended March 31, 2022 and 2021, respectively.

Revenue from Contracts with Cus

Revenue from Contracts with Customers	3 Months Ended
	Mar. 31, 2022
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	2. REVENUE FROM CONTRACTS WITH CUSTOMERS The following table summarizes revenue from contracts with customers: Three Months Ended thousands 2022 2021 Revenue from customers Service revenues – fee based $ 631,598 $ 529,413 Service revenues – product based 40,867 31,652 Product sales 85,589 70,805 Total revenue from customers 758,054 631,870 Revenue from other than customers Lease revenue (1) — 42,862 Other 243 242 Total revenues and other $ 758,297 $ 674,974 _________________________________________________________________________________________ (1) Includes fixed - and variable - lease revenue from an operating and maintenance agreement entered into with Occidental. See Operating leases within Note 5. Contract balances. Receivables from customers, which are included in Accounts receivable, net on the consolidated balance sheets were $589.5 million and $424.6 million as of March 31, 2022 and December 31, 2021, respectively. Contract assets primarily relate to (i) revenue accrued but not yet billed under cost - of - service contracts with fixed and variable fees and (ii) accrued deficiency fees the Partnership expects to charge customers once the related performance periods are completed. The following table summarizes activity related to contract assets from contracts with customers: thousands Contract assets balance at December 31, 2021 $ 22,557 Amounts transferred to Accounts receivable, net that were included in the contract assets balance at the beginning of the period (208) Additional estimated revenues recognized 6,553 Contract assets balance at March 31, 2022 $ 28,902 Contract assets at March 31, 2022 Other current assets $ 10,897 Other assets 18,005 Total contract assets from contracts with customers $ 28,902 2. REVENUE FROM CONTRACTS WITH CUSTOMERS Contract liabilities primarily relate to (i) fixed and variable fees under cost - of - service contracts that are received from customers for which revenue recognition is deferred, (ii) aid - in - construction payments received from customers that must be recognized over the expected period of customer benefit, and (iii) fees that are charged to customers for only a portion of the contract term and must be recognized as revenues over the expected period of customer benefit. The following table summarizes activity related to contract liabilities from contracts with customers: thousands Contract liabilities balance at December 31, 2021 $ 313,146 Cash received or receivable, excluding revenues recognized during the period 8,245 Revenues recognized that were included in the contract liability balance at the beginning of the period (11,241) Contract liabilities balance at March 31, 2022 $ 310,150 Contract liabilities at March 31, 2022 Accrued liabilities $ 8,924 Other liabilities 301,226 Total contract liabilities from contracts with customers $ 310,150 Transaction price allocated to remaining performance obligations. Revenues expected to be recognized from certain performance obligations that are unsatisfied (or partially unsatisfied) as of March 31, 2022, are presented in the following table. The Partnership applies the optional exemptions in Revenue from Contracts with Customers (Topic 606) and does not disclose consideration for remaining performance obligations with an original expected duration of one year or less or for variable consideration related to unsatisfied (or partially unsatisfied) performance obligations. Therefore, the following table represents only a portion of expected future revenues from existing contracts as most future revenues from customers are dependent on future variable customer volumes and, in some cases, variable commodity prices for those volumes. thousands Remainder of 2022 $ 824,085 2023 1,047,028 2024 1,021,224 2025 937,443 2026 809,384 Thereafter 2,177,567 Total $ 6,816,731

Partnership Distributions

Partnership Distributions	3 Months Ended
	Mar. 31, 2022
Distributions Made to Members or Limited Partners [Abstract]
Partnership Distributions	3. PARTNERSHIP DISTRIBUTIONS Partnership distributions. Under its partnership agreement, the Partnership distributes all of its available cash (beyond proper reserves as defined in its partnership agreement) to unitholders of record on the applicable record date within 55 days following each quarter’s end. The Board of Directors of the general partner (the “Board”) declared the following cash distributions to the Partnership’s unitholders for the periods presented: thousands except per-unit amounts Quarters Ended Total Quarterly Total Quarterly Distribution Record 2021 March 31 $ 0.31500 $ 132,969 May 14, 2021 April 30, 2021 June 30 0.31900 134,662 August 13, 2021 July 30, 2021 September 30 0.32300 134,862 November 12, 2021 November 1, 2021 December 31 0.32700 134,749 February 14, 2022 January 31, 2022 2022 March 31 $ 0.50000 $ 206,197 May 13, 2022 May 2, 2022 Available cash. The amount of available cash (beyond proper reserves as defined in the partnership agreement) generally is all cash on hand at the end of the quarter, plus, at the discretion of the general partner, working capital borrowings made subsequent to the end of such quarter, less the amount of cash reserves established by the general partner to provide for the proper conduct of the Partnership’s business, including (i) to fund future capital expenditures; (ii) to comply with applicable laws, debt instruments, or other agreements; or (iii) to provide funds for unitholder distributions for any one or more of the next four quarters. Working capital borrowings generally include borrowings made under a credit facility or similar financing arrangement and are intended to be repaid or refinanced within 12 months. In all cases, working capital borrowings are used solely for working capital purposes or to fund unitholder distributions. WES Operating partnership distributions. WES Operating makes quarterly cash distributions to the Partnership and WGR Asset Holding Company LLC (“WGRAH”), a subsidiary of Occidental, in proportion to their share of limited partner interests in WES Operating. See Note 4 . WES Operating made the following cash distributions to its limited partners for the periods presented: thousands Quarters Ended Total Quarterly Distribution 2021 March 31 $ 137,030 May 2021 June 30 140,217 August 2021 September 30 140,217 November 2021 December 31 140,217 February 2022 2022 March 31 $ 213,513 May 2022

Equity and Partners' Capital

Equity and Partners' Capital	3 Months Ended
	Mar. 31, 2022
Partners' Capital Notes [Abstract]
Equity and Partners' Capital	4. EQUITY AND PARTNERS’ CAPITAL Holdings of Partnership equity. The Partnership’s common units are listed on the New York Stock Exchange under the ticker symbol “WES.” As of March 31, 2022, Occidental held 200,281,578 common units, representing a 48.6% limited partner interest in the Partnership, and through its ownership of the general partner, Occidental indirectly held 9,060,641 general partner units, representing a 2.2% general partner interest in the Partnership. The public held 203,052,232 common units, representing a 49.2% limited partner interest in the Partnership. In March 2021, an affiliate of Occidental sold 11,500,000 of the Partnership’s common units it held through an underwritten offering, including 1,500,000 common units pursuant to the full exercise of the underwriters’ over - allotment option. The Partnership did not receive any proceeds from the public offering. Partnership equity repurchases. In February 2022, the Board authorized the Partnership to buy back up to $1.0 billion of the Partnership’s common units through December 31, 2024 (the “$1.0 billion Purchase Program”). The common units may be purchased from time to time in the open market at prevailing market prices or in privately negotiated transactions. During the three months ended March 31, 2022, the Partnership repurchased 225,355 common units on the open market for an aggregate purchase price of $5.1 million. The units were canceled immediately upon receipt. As of March 31, 2022, the Partnership had an authorized amount of $994.9 million remaining under the program. In November 2020, the Board authorized the Partnership to buy back up to $250.0 million of the Partnership’s common units through December 31, 2021 (the “$250.0 million Purchase Program”). The common units were purchased from time to time in the open market at prevailing market prices or in privately negotiated transactions. During the three months ended March 31, 2021, the Partnership repurchased 1,115,808 common units on the open market for an aggregate purchase price of $16.2 million. The units were canceled by the Partnership immediately upon receipt. As of December 31, 2021, the entire $250.0 million authorized program had been fulfilled. Holdings of WES Operating equity. As of March 31, 2022, (i) the Partnership, directly and indirectly through its ownership of WES Operating GP, owned a 98.0% limited partner interest and the entire non - economic general partner interest in WES Operating and (ii) Occidental, through its ownership of WGRAH, owned a 2.0% limited partner interest in WES Operating, which is reflected as a noncontrolling interest within the consolidated financial statements of the Partnership (see Note 1 ). Partnership’s net income (loss) per common unit. The common and general partner unitholders’ allocation of net income (loss) attributable to the Partnership was equal to their cash distributions plus their respective allocations of undistributed earnings or losses in accordance with their weighted - average ownership percentage during each period using the two - class method. The Partnership’s basic net income (loss) per common unit is calculated by dividing the limited partners’ interest in net income (loss) by the weighted - average number of common units outstanding during the period. Diluted net income (loss) per common unit includes the effect of outstanding units issued under the Partnership’s long-term incentive plans. 4. EQUITY AND PARTNERS’ CAPITAL The following table provides a reconciliation between basic and diluted net income (loss) per common unit: Three Months Ended thousands except per-unit amounts 2022 2021 Net income (loss) Limited partners’ interest in net income (loss) $ 301,934 $ 181,798 Weighted-average common units outstanding Basic 403,254 413,104 Dilutive effect of non-vested phantom units 1,206 342 Diluted 404,460 413,446 Excluded due to anti-dilutive effect 469 404 Net income (loss) per common unit Basic $ 0.75 $ 0.44 Diluted $ 0.75 $ 0.44 WES Operating’s net income (loss) per common unit. Net income (loss) per common unit for WES Operating is not calculated because it has no publicly traded units.

Related-Party Transactions

Related-Party Transactions	3 Months Ended
	Mar. 31, 2022
Related Party Fees and Other Arrangements, Limited Liability Company (LLC) or Limited Partnership (LP) [Abstract]
Related-Party Transactions	5. RELATED-PARTY TRANSACTIONS Summary of related-party transactions. The following tables summarize material related - party transactions included in the Partnership’s consolidated financial statements: Consolidated statements of operations Three Months Ended thousands 2022 2021 Revenues and other Service revenues – fee based $ 414,899 $ 367,475 Service revenues – product based 2,243 4,505 Product sales 11,567 6,271 Total revenues and other 428,709 378,251 Equity income, net – related parties (1) 49,607 52,165 Operating expenses Cost of product (2) (19,543) 17,647 Operation and maintenance (59) 18,122 General and administrative (3) 1,975 4,093 Total operating expenses (17,627) 39,862 _________________________________________________________________________________________ (1) See Note 6 . (2) Includes related-party natural - gas and NGLs imbalances. (3) Includes (i) amounts charged by Occidental pursuant to the shared services agreement (see Services Agreement within this Note 5 ) and (ii) equity - based compensation expense allocated to the Partnership by Occidental, which is not reimbursed to Occidental and is reflected as a contribution to partners’ capital in the consolidated statements of equity and partners’ capital (see Incentive Plans within this Note 5 ). 5. RELATED-PARTY TRANSACTIONS Consolidated balance sheets thousands March 31, December 31, Assets Accounts receivable, net $ 274,222 $ 180,205 Other current assets 28,847 12,490 Equity investments (1) 1,163,069 1,167,187 Other assets 46,531 45,494 Total assets 1,512,669 1,405,376 Liabilities Accounts and imbalance payables 47,281 49,242 Accrued liabilities 4,476 13,914 Other liabilities 223,972 207,365 Total liabilities 275,729 270,521 _________________________________________________________________________________________ (1) See Note 6 . Consolidated statements of cash flows Three Months Ended thousands 2022 2021 Distributions from equity - investment earnings – related parties $ 45,870 $ 49,048 Capital expenditures — (2,000) Contributions to equity investments – related parties (2,070) (86) Distributions from equity investments in excess of cumulative earnings – related parties 9,925 12,141 Distributions to Partnership unitholders (1) (65,492) (66,642) Distributions to WES Operating unitholders (2) (2,805) (2,551) Net contributions from (distributions to) related parties 409 1,627 _________________________________________________________________________________________ (1) Represents distributions paid to Occidental pursuant to the partnership agreement of the Partnership (see Note 3 and Note 4 ). (2) Represents distributions paid to Occidental, through its ownership of WGRAH, pursuant to WES Operating’s partnership agreement (see Note 3 and Note 4 ). 5. RELATED-PARTY TRANSACTIONS The following tables summarize material related - party transactions for WES Operating (which are included in the Partnership’s consolidated financial statements) to the extent the amounts differ from the Partnership’s consolidated financial statements: Consolidated statements of operations Three Months Ended thousands 2022 2021 General and administrative (1) $ 2,948 $ 4,587 _________________________________________________________________________________________ (1) Includes (i) amounts charged by Occidental pursuant to the shared services agreement (see Services Agreement within this Note 5 ), (ii) equity - based compensation expense allocated to WES Operating by Occidental, which is not reimbursed to Occidental and is reflected as a contribution to partners’ capital in the consolidated statements of equity and partners’ capital (see Incentive Plans within this Note 5 ), and (iii) an intercompany service fee between the Partnership and WES Operating. Consolidated balance sheets thousands March 31, December 31, Other assets $ 45,619 $ 45,494 Accounts and imbalance payables (1) 64,211 97,749 Accrued liabilities 4,159 13,597 _________________________________________________________________________________________ (1) Includes balances related to transactions between the Partnership and WES Operating. Consolidated statements of cash flows Three Months Ended thousands 2022 2021 Distributions to WES Operating unitholders (1) $ (140,217) $ (127,470) _________________________________________________________________________________________ (1) Represents distributions paid to the Partnership and Occidental, through its ownership of WGRAH, pursuant to WES Operating’s partnership agreement. See Note 3 and Note 4 . Related-party revenues. Related - party revenues include amounts earned by the Partnership from services provided to Occidental and from the sale of natural gas, condensate, and NGLs to Occidental. Gathering and processing agreements. The Partnership has significant gathering, processing, and produced-water disposal arrangements with affiliates of Occidental on most of its systems. While Occidental is the contracting counterparty of the Partnership, these arrangements with Occidental include not just Occidental - produced volumes, but also, in some instances, the volumes of other working - interest owners of Occidental who rely on the Partnership’s facilities and infrastructure to bring their volumes to market. Natural-gas throughput (excluding equity-investment throughput) attributable to production owned or controlled by Occidental was 36% and 35% for the three months ended March 31, 2022 and 2021, respectively. Crude-oil and NGLs throughput (excluding equity-investment throughput) attributable to production owned or controlled by Occidental was 89% and 88% for the three months ended March 31, 2022 and 2021, respectively. Produced-water throughput attributable to production owned or controlled by Occidental was 84% and 86% for the three months ended March 31, 2022 and 2021, respectively. The Partnership is currently involved in a dispute with Occidental regarding the calculation of the cost - of - service rates under an oil - gathering contract related to the Partnership’s DJ Basin oil - gathering system. If such dispute is resolved in a manner adverse to the Partnership, such resolution could have a negative impact on the Partnership’s financial condition and results of operations, including a reduction in rates and a non - cash charge to earnings. 5. RELATED-PARTY TRANSACTIONS In connection with the sale of its Eagle Ford assets in 2017, Anadarko remained the primary counterparty to the Partnership’s Brasada gas processing agreement and entered into an agency relationship with Sanchez Energy Corporation (“Sanchez”), now Mesquite Energy, Inc. (“Mesquite”), that allows Mesquite to process gas under such agreement. In December 2021, the Brasada gas processing agreement was assigned from Anadarko to Mesquite effective July 1, 2023. For this reason, Anadarko continues to be liable under the Brasada gas processing agreement until June 30, 2023, to the extent Mesquite does not perform. For all periods presented, Mesquite has performed Anadarko’s obligations under the Brasada gas processing agreement pursuant to its agency arrangement with Anadarko. Further, in connection with the sale of its Uinta Basin assets in 2020, Kerr McGee Oil & Gas Onshore LP, a subsidiary of Occidental, retained the deficiency payment obligations under a gas processing agreement at the Chipeta plant. This contingent payment obligation extends through the earlier of October 1, 2022, or the termination of the processing agreement. Marketing Transition Services Agreement. Effective December 31, 2019, certain subsidiaries of Anadarko entered into a transition services agreement (the “Marketing Transition Services Agreement”) to provide marketing - related services to certain of the Partnership’s subsidiaries through December 31, 2020, subject to the option to extend such services for an additional six - month period. The Marketing Transition Services Agreement was terminated on December 31, 2020. While the Partnership still has some marketing agreements with affiliates of Occidental, the Partnership began marketing and selling substantially all of its natural gas and NGLs directly to third parties beginning on January 1, 2021. Operating leases. As a result of the surface - use and salt - water disposal agreements being amended under the CUA (see Related-party commercial agreement below), these agreements are now classified as operating leases and a $30.0 million right-of-use (“ROU”) asset, included in Other assets on the consolidated balance sheets, was recognized during the first quarter of 2021. The ROU asset will be amortized to Operation and maintenance expense over the remaining term of the agreements. Effective December 31, 2019, an affiliate of Occidental and a wholly owned subsidiary of the Partnership, the lessor, entered into an operating and maintenance agreement pursuant to which Occidental provided operational and maintenance services with respect to a crude - oil gathering system and associated treating facilities owned by the Partnership through December 31, 2021. The agreement and underlying contracts included (i) fixed consideration, which was measured as the minimum - volume commitment for both gathering and treating, and (ii) variable consideration, which consisted of all volumes above the minimum - volume commitment. In April 2021, the Partnership exercised its option to terminate the operating and maintenance agreement with Occidental effective December 31, 2021. For the three months ended March 31, 2021, the Partnership recognized fixed-lease revenue of $43.9 million and variable-lease revenue of $(1.1) million related to these agreements, with such amounts included in Service revenues – fee based in the consolidated statements of operations. Related-party expenses. Operation and maintenance expense includes amounts accrued for or paid to related parties for field - related costs provided by related parties at certain of the Partnership’s assets. A portion of general and administrative expense is paid by Occidental, which results in related - party transactions pursuant to the reimbursement provisions of the Partnership’s and WES Operating’s agreements with Occidental. Cost of product expense includes amounts related to certain continuing marketing arrangements with affiliates of Occidental, related - party imbalances, and transactions with affiliates accounted for under the equity method of accounting. See Marketing Transition Services Agreement in the sections above. Related - party expenses do not bear a direct relationship to related - party revenues, and third - party expenses do not bear a direct relationship to third - party revenues. 5. RELATED-PARTY TRANSACTIONS Services Agreement. General and administrative expense includes costs incurred pursuant to the agreement dated as of December 31, 2019, by and among Occidental, Anadarko, and WES Operating GP, under which Occidental has performed certain centralized corporate functions for the Partnership and WES Operating (“Services Agreement”). Most of the administrative and operational services previously provided by Occidental fully transitioned to the Partnership by December 31, 2021, with certain limited transition services remaining in place pursuant to the terms of the Services Agreement. Incentive Plans. General and administrative expense includes non - cash equity - based compensation expense allocated to the Partnership by Occidental for awards granted to the executive officers of the general partner and to other employees prior to their employment with the Partnership under (i) the Anadarko Petroleum Corporation 2012 Omnibus Incentive Compensation Plan, as amended and restated, (ii) Occidental’s 2015 Long - Term Incentive Plan, and (iii) Occidental’s Phantom Share Unit Award Plan (collectively referred to as the “Incentive Plans”). General and administrative expense includes costs related to the Incentive Plans of $1.9 million and $3.2 million for the three months ended March 31, 2022 and 2021, respectively. These amounts are reflected as contributions to partners’ capital in the consolidated statements of equity and partners’ capital. Construction reimbursement agreements and purchases from related parties . From time to time, the Partnership enters into construction reimbursement agreements with Occidental providing that the Partnership will manage the construction of certain midstream infrastructure for Occidental in the Partnership’s areas of operation. Such arrangements generally provide for a reimbursement of costs incurred by the Partnership on a cost or cost-plus basis. Additionally, from time to time, in support of the Partnership’s business, the Partnership purchases equipment, inventory, and other miscellaneous assets from Occidental or its affiliates. Related-party commercial agreement. During the first quarter of 2021, an affiliate of Occidental and certain wholly owned subsidiaries of the Partnership entered into a Commercial Understanding Agreement (“CUA”). Under the CUA, certain West Texas surface - use and salt - water disposal agreements were amended to reduce usage fees owed by the Partnership in exchange for the forgiveness of certain deficiency fees owed by Occidental and other unrelated contractual amendments. The present value of the reduced usage fees under the CUA was $30.0 million at the time the agreement was executed. Customer concentration. Occidental was the only customer from which revenues exceeded 10% of consolidated revenues for all periods presented in the consolidated statements of operations.

Equity Investments

Equity Investments	3 Months Ended
	Mar. 31, 2022
Equity Method Investments and Joint Ventures [Abstract]
Equity Investments	6. EQUITY INVESTMENTS The following table presents the financial statement impact of the Partnership’s equity investments for the three months ended March 31, 2022: thousands Balance at December 31, 2021 Equity Contributions Distributions Distributions in excess of cumulative earnings (1) Balance at March 31, 2022 White Cliffs $ 40,753 $ 231 $ — $ (86) $ (899) $ 39,999 Rendezvous 22,075 (703) — (112) (651) 20,609 Mont Belvieu JV 96,728 7,891 — (7,986) (1,907) 94,726 TEG 16,116 1,482 — (1,363) — 16,235 TEP 188,925 10,086 — (10,149) (882) 187,980 FRP 196,632 9,997 — (10,220) (1,304) 195,105 Whitethorn LLC 149,690 260 255 2,575 (882) 151,898 Cactus II 171,294 3,575 — (3,617) (2,412) 168,840 Saddlehorn 110,441 5,471 — (5,354) (180) 110,378 Panola 20,044 571 — (571) (171) 19,873 Mi Vida 51,763 4,218 — (3,823) — 52,158 Ranch Westex 979 3,862 — (2,498) — 2,343 Red Bluff Express 101,747 2,666 1,815 (2,666) (637) 102,925 Total $ 1,167,187 $ 49,607 $ 2,070 $ (45,870) $ (9,925) $ 1,163,069 _________________________________________________________________________________________ (1) Distributions in excess of cumulative earnings, classified as investing cash flows in the consolidated statements of cash flows, are calculated on an individual - investment basis.

Property, Plant, and Equipment

Property, Plant, and Equipment	3 Months Ended
	Mar. 31, 2022
Property, Plant and Equipment [Abstract]
Property, Plant, and Equipment	7. PROPERTY, PLANT, AND EQUIPMENT A summary of the historical cost of property, plant, and equipment is as follows: thousands Estimated Useful Life March 31, December 31, Land N/A $ 10,955 $ 10,955 Gathering systems – pipelines 30 years 5,429,779 5,386,003 Gathering systems – compressors 15 years 2,203,895 2,172,953 Processing complexes and treating facilities 25 years 3,380,819 3,375,317 Transportation pipeline and equipment 6 to 45 years 169,380 169,356 Produced - water disposal systems 20 years 885,265 882,527 Assets under construction N/A 91,268 98,473 Other 3 to 40 years 758,997 750,494 Total property, plant, and equipment 12,930,358 12,846,078 Less accumulated depreciation 4,455,162 4,333,171 Net property, plant, and equipment $ 8,475,196 $ 8,512,907 The cost of property classified as “Assets under construction” is excluded from capitalized costs being depreciated. These amounts represent property that is not yet placed into productive service as of the respective balance sheet date. Long-lived asset and other impairments. During the three months ended March 31, 2021, the Partnership recognized impairments of $14.9 million, primarily attributable to $13.5 million of impairments at the DJ Basin complex due to cancellation of projects.

Selected Components of Working

Selected Components of Working Capital	3 Months Ended
	Mar. 31, 2022
Selected Components Of Working Capital [Abstract]
Selected Components of Working Capital	8. SELECTED COMPONENTS OF WORKING CAPITAL A summary of accounts receivable, net is as follows: The Partnership WES Operating thousands March 31, December 31, March 31, December 31, Trade receivables, net $ 601,640 $ 436,513 $ 601,640 $ 436,513 Other receivables, net 7 — 7 — Total accounts receivable, net $ 601,647 $ 436,513 $ 601,647 $ 436,513 A summary of other current assets is as follows: The Partnership WES Operating thousands March 31, December 31, March 31, December 31, NGLs inventory $ 1,953 $ 3,370 $ 1,953 $ 3,370 Imbalance receivables 34,757 25,309 34,757 25,309 Prepaid insurance 5,792 10,369 4,418 8,538 Contract assets 10,897 5,307 10,897 5,307 Other 2,998 1,897 2,998 1,897 Total other current assets $ 56,397 $ 46,252 $ 55,023 $ 44,421 A summary of accrued liabilities is as follows: The Partnership WES Operating thousands March 31, December 31, March 31, December 31, Accrued interest expense $ 65,562 $ 131,177 $ 65,562 $ 131,177 Short - term asset retirement obligations 12,337 9,934 12,337 9,934 Short - term remediation and reclamation obligations 8,316 7,454 8,316 7,454 Income taxes payable 2,190 1,516 2,190 1,516 Contract liabilities 8,924 27,763 8,924 27,763 Other 62,918 85,405 34,980 32,849 Total accrued liabilities $ 160,247 $ 263,249 $ 132,309 $ 210,693

Debt and Interest Expense

Debt and Interest Expense	3 Months Ended
	Mar. 31, 2022
Debt Instruments [Abstract]
Debt and Interest Expense	9. DEBT AND INTEREST EXPENSE WES Operating is the borrower for all outstanding debt and is expected to be the borrower for all future debt issuances. The following table presents the outstanding debt: March 31, 2022 December 31, 2021 thousands Principal Carrying Fair Value (1) Principal Carrying Fair Value (1) Short - term debt 4.000% Senior Notes due 2022 $ 502,246 $ 502,192 $ 502,250 $ 502,246 $ 502,138 $ 505,153 Floating - Rate Senior Notes due 2023 213,138 212,760 212,425 — — — Finance lease liabilities 3,201 3,201 3,201 3,794 3,794 3,794 Total short - term debt $ 718,585 $ 718,153 $ 717,876 $ 506,040 $ 505,932 $ 508,947 Long - term debt Floating - Rate Senior Notes due 2023 $ — $ — $ — $ 213,138 $ 212,642 $ 213,072 3.100% Senior Notes due 2025 732,106 728,404 728,061 732,106 728,096 764,815 3.950% Senior Notes due 2025 399,163 396,149 402,063 399,163 395,928 418,506 4.650% Senior Notes due 2026 474,242 471,761 485,982 474,242 471,629 516,473 4.500% Senior Notes due 2028 400,000 396,281 407,380 400,000 396,145 437,673 4.750% Senior Notes due 2028 400,000 397,037 413,219 400,000 396,938 444,550 4.050% Senior Notes due 2030 1,200,000 1,190,584 1,201,380 1,200,000 1,190,339 1,323,595 5.450% Senior Notes due 2044 600,000 593,769 609,529 600,000 593,733 717,804 5.300% Senior Notes due 2048 700,000 687,321 694,990 700,000 687,265 844,223 5.500% Senior Notes due 2048 350,000 342,689 347,087 350,000 342,659 418,907 5.250% Senior Notes due 2050 1,000,000 983,765 982,278 1,000,000 983,709 1,183,514 Finance lease liabilities 990 990 990 1,533 1,533 1,533 Total long - term debt $ 6,256,501 $ 6,188,750 $ 6,272,959 $ 6,470,182 $ 6,400,616 $ 7,284,665 _________________________________________________________________________________________ (1) Fair value is measured using the market approach and Level - 2 fair value inputs. 9. DEBT AND INTEREST EXPENSE Debt activity. The following table presents the debt activity for the three months ended March 31, 2022: thousands Carrying Value Balance at December 31, 2021 $ 6,906,548 Finance lease liabilities (1,135) Other 1,490 Balance at March 31, 2022 $ 6,906,903 WES Operating Senior Notes. In mid - January 2020, WES Operating issued the Fixed - Rate 3.100% Senior Notes due 2025, 4.050% Senior Notes due 2030, and 5.250% Senior Notes due 2050 (collectively referred to as the “Fixed - Rate Senior Notes”) and the Floating - Rate Senior Notes due 2023 (the “Floating - Rate Senior Notes”). Including the effects of the issuance prices, underwriting discounts, and interest - rate adjustments, the effective interest rates of the Senior Notes due 2025, 2030, and 2050, were 3.790%, 4.671%, and 5.869%, respectively, at March 31, 2022, and were 4.542%, 5.424%, and 6.629%, respectively, at March 31, 2021. The interest rate on the Floating - Rate Senior Notes was 1.84% and 2.33% at March 31, 2022 and 2021, respectively. The effective interest rate of these notes is subject to adjustment from time to time due to a change in credit rating. During the first quarter of 2021, WES Operating redeemed the total principal amount outstanding of the 5.375% Senior Notes due 2021 at par value, pursuant to the optional redemption terms in WES Operating’s indenture. As of March 31, 2022, the 4.000% Senior Notes due 2022 and the Floating-Rate Senior Notes were classified as short-term debt on the consolidated balance sheet. Subsequent to March 31, 2022, WES Operating redeemed the 4.000% Senior Notes due 2022 at par value on April 1, 2022, pursuant to the optional redemption terms in WES Operating’s indenture. At March 31, 2022, WES Operating was in compliance with all covenants under the relevant governing indentures. Revolving credit facility. WES Operating’s $2.0 billion senior unsecured revolving credit facility (“RCF”) is expandable to a maximum of $2.5 billion, and matures in February 2025 for each extending lender. The non - extending lender’s commitments mature in February 2024 and represent $100.0 million out of $2.0 billion of total commitments from all lenders. As of March 31, 2022, there were no outstanding borrowings and $5.1 million of outstanding letters of credit, resulting in $2.0 billion of available borrowing capacity under the RCF. As of March 31, 2022 and 2021, the interest rate on any outstanding RCF borrowings was 1.95% and 1.61%, respectively. The facility - fee rate was 0.25% at March 31, 2022 and 2021. At March 31, 2022, WES Operating was in compliance with all covenants under the RCF. Finance lease liabilities. During the first quarter of 2020, the Partnership entered into finance leases with third parties for equipment and vehicles. Certain of these equipment leases were amended during the third quarter of 2021 requiring reassessment of lease classification. As a result, these leases were classified as operating leases. The Partnership has future payments for its finance leases of $4.3 million as of March 31, 2022. 9. DEBT AND INTEREST EXPENSE Interest expense. The following table summarizes the amounts included in interest expense: Three Months Ended thousands 2022 2021 Long - term and short - term debt $ (83,428) $ (95,722) Finance lease liabilities (42) (298) Commitment fees and amortization of debt-related costs (3,032) (3,338) Capitalized interest 1,047 865 Interest expense $ (85,455) $ (98,493)

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	10. COMMITMENTS AND CONTINGENCIES Environmental obligations. The Partnership is subject to various environmental-remediation obligations arising from federal, state, and local regulations regarding air and water quality, hazardous and solid waste disposal, and other environmental matters. As of March 31, 2022 and December 31, 2021, the consolidated balance sheets included $9.8 million and $10.1 million, respectively, of liabilities for remediation and reclamation obligations. The current portion of these amounts is included in Accrued liabilities, and the long-term portion of these amounts is included in Other liabilities. The majority of payments related to these obligations are expected to be made over the next year. Litigation and legal proceedings. From time to time, the Partnership is involved in legal, tax, regulatory, and other proceedings in various forums regarding performance, contracts, and other matters that arise in the ordinary course of business. Management is not aware of any such proceeding for which the final disposition could have a material adverse effect on the Partnership’s financial condition, results of operations, or cash flows. Other commitments. The Partnership has payment obligations, or commitments, that include, among other things, a revolving credit facility, other third - party long - term debt, obligations related to the Partnership’s capital spending programs, pipeline commitments, and various operating and finance leases. The payment obligations related to the Partnership’s capital spending programs, the majority of which is expected to be paid in the next 12 months, primarily relate to construction, expansion, and asset - integrity projects at the West Texas complex, DBM water systems, DBM oil system, and DJ Basin complex.

Description of Business and B_2

Description of Business and Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2022
Accounting Policies [Abstract]
Consolidation policy	Basis of presentation. The consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) and include the accounts of the Partnership and entities in which it holds a controlling financial interest, including WES Operating, WES Operating GP, proportionately consolidated interests, and equity investments (see table below). All significant intercompany transactions have been eliminated. The following table outlines the ownership interests and the accounting method of consolidation used in the consolidated financial statements for entities not wholly owned: Percentage Interest Full consolidation Chipeta (1) 75.00 % Proportionate consolidation (2) Springfield system 50.10 % Marcellus Interest systems 33.75 % Equity investments (3) Mi Vida JV LLC (“Mi Vida”) 50.00 % Ranch Westex JV LLC (“Ranch Westex”) 50.00 % Front Range Pipeline LLC (“FRP”) 33.33 % Red Bluff Express Pipeline, LLC (“Red Bluff Express”) 30.00 % Enterprise EF78 LLC (“Mont Belvieu JV”) 25.00 % Rendezvous Gas Services, LLC (“Rendezvous”) 22.00 % Texas Express Pipeline LLC (“TEP”) 20.00 % Texas Express Gathering LLC (“TEG”) 20.00 % Whitethorn Pipeline Company LLC (“Whitethorn LLC”) 20.00 % Saddlehorn Pipeline Company, LLC (“Saddlehorn”) 20.00 % Cactus II Pipeline LLC (“Cactus II”) 15.00 % Panola Pipeline Company, LLC (“Panola”) 15.00 % White Cliffs Pipeline, LLC (“White Cliffs”) 10.00 % _________________________________________________________________________________________ (1) The 25% third - party interest in Chipeta Processing LLC (“Chipeta”) is reflected within noncontrolling interests in the consolidated financial statements. See Noncontrolling interests below. (2) The Partnership proportionately consolidates its associated share of the assets, liabilities, revenues, and expenses attributable to these assets. (3) Investments in non - controlled entities over which the Partnership exercises significant influence are accounted for under the equity method of accounting. “Equity - investment throughput” refers to the Partnership’s share of average throughput for these investments. Certain information and note disclosures commonly included in annual financial statements have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Accordingly, the accompanying consolidated financial statements and notes should be read in conjunction with the Partnership’s 2021 Form 10-K, as filed with the SEC on February 23, 2022. Management believes that the disclosures made are adequate to make the information not misleading. 1. DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION The consolidated financial results of WES Operating are included in the Partnership’s consolidated financial statements. Throughout these notes to consolidated financial statements, and to the extent material, any differences between the consolidated financial results of the Partnership and WES Operating are discussed separately. The Partnership’s consolidated financial statements differ from those of WES Operating primarily as a result of (i) the presentation of noncontrolling interest ownership (see Noncontrolling interests below), (ii) the elimination of WES Operating GP’s investment in WES Operating with WES Operating GP’s underlying capital account, (iii) the general and administrative expenses incurred by the Partnership, which are separate from, and in addition to, those incurred by WES Operating, (iv) the inclusion of the impact of Partnership equity balances and Partnership distributions, and (v) transactions between the Partnership and WES Operating that eliminate upon consolidation. Presentation of the Partnership’s assets. The Partnership’s assets include assets owned and ownership interests accounted for by the Partnership under the equity method of accounting, through its 98.0% partnership interest in WES Operating, as of March 31, 2022 (see Note 6 ). The Partnership also owns and controls the entire non - economic general partner interest in WES Operating GP, and the Partnership’s general partner is owned by Occidental. Noncontrolling interests. The Partnership’s noncontrolling interests in the consolidated financial statements consist of (i) the 25% third - party interest in Chipeta and (ii) the 2.0% Occidental subsidiary - owned limited partner interest in WES Operating. WES Operating’s noncontrolling interest in the consolidated financial statements consists of the 25% third - party interest in Chipeta. See Note 4.
Use of estimates policy	Use of estimates. In preparing financial statements in accordance with GAAP, management makes informed judgments and estimates that affect the reported amounts of assets, liabilities, revenues, and expenses. Management evaluates its estimates and related assumptions regularly, using historical experience and other reasonable methods. Changes in facts and circumstances or additional information may result in revised estimates, and actual results may differ from these estimates. Effects on the business, financial condition, and results of operations resulting from revisions to estimates are recognized when the facts that give rise to the revisions become known. The information included herein reflects all normal recurring adjustments which are, in the opinion of management, necessary for a fair presentation of the consolidated financial statements, and certain prior-period amounts have been reclassified to conform to the current-year presentation.
Segments policy	Segments. The Partnership’s operations continue to be organized into a single operating segment, the assets of which gather, compress, treat, process, and transport natural gas; gather, stabilize, and transport condensate, NGLs, and crude oil; and gather and dispose of produced water in the United States.
Net income (loss) per common unit policy	Partnership’s net income (loss) per common unit. The common and general partner unitholders’ allocation of net income (loss) attributable to the Partnership was equal to their cash distributions plus their respective allocations of undistributed earnings or losses in accordance with their weighted - average ownership percentage during each period using the two - class method. The Partnership’s basic net income (loss) per common unit is calculated by dividing the limited partners’ interest in net income (loss) by the weighted - average number of common units outstanding during the period. Diluted net income (loss) per common unit includes the effect of outstanding units issued under the Partnership’s long-term incentive plans. 4. EQUITY AND PARTNERS’ CAPITAL The following table provides a reconciliation between basic and diluted net income (loss) per common unit: Three Months Ended thousands except per-unit amounts 2022 2021 Net income (loss) Limited partners’ interest in net income (loss) $ 301,934 $ 181,798 Weighted-average common units outstanding Basic 403,254 413,104 Dilutive effect of non-vested phantom units 1,206 342 Diluted 404,460 413,446 Excluded due to anti-dilutive effect 469 404 Net income (loss) per common unit Basic $ 0.75 $ 0.44 Diluted $ 0.75 $ 0.44 WES Operating’s net income (loss) per common unit. Net income (loss) per common unit for WES Operating is not calculated because it has no publicly traded units.

Description of Business and B_3

Description of Business and Basis of Presentation (Tables)	3 Months Ended
	Mar. 31, 2022
Accounting Policies [Abstract]
Assets and Investments Table	As of March 31, 2022, the Partnership’s assets and investments consisted of the following: Wholly Operated Non-Operated Equity Gathering systems (1) 17 2 3 1 Treating facilities 37 3 — — Natural - gas processing plants/trains 24 3 — 5 NGLs pipelines 2 — — 5 Natural - gas pipelines 5 — — 1 Crude - oil pipelines 3 1 — 4 _________________________________________________________________________________________ (1) Includes the DBM water systems.
Ownership Interests and Method of Consolidation Table	The following table outlines the ownership interests and the accounting method of consolidation used in the consolidated financial statements for entities not wholly owned: Percentage Interest Full consolidation Chipeta (1) 75.00 % Proportionate consolidation (2) Springfield system 50.10 % Marcellus Interest systems 33.75 % Equity investments (3) Mi Vida JV LLC (“Mi Vida”) 50.00 % Ranch Westex JV LLC (“Ranch Westex”) 50.00 % Front Range Pipeline LLC (“FRP”) 33.33 % Red Bluff Express Pipeline, LLC (“Red Bluff Express”) 30.00 % Enterprise EF78 LLC (“Mont Belvieu JV”) 25.00 % Rendezvous Gas Services, LLC (“Rendezvous”) 22.00 % Texas Express Pipeline LLC (“TEP”) 20.00 % Texas Express Gathering LLC (“TEG”) 20.00 % Whitethorn Pipeline Company LLC (“Whitethorn LLC”) 20.00 % Saddlehorn Pipeline Company, LLC (“Saddlehorn”) 20.00 % Cactus II Pipeline LLC (“Cactus II”) 15.00 % Panola Pipeline Company, LLC (“Panola”) 15.00 % White Cliffs Pipeline, LLC (“White Cliffs”) 10.00 % _________________________________________________________________________________________ (1) The 25% third - party interest in Chipeta Processing LLC (“Chipeta”) is reflected within noncontrolling interests in the consolidated financial statements. See Noncontrolling interests below. (2) The Partnership proportionately consolidates its associated share of the assets, liabilities, revenues, and expenses attributable to these assets. (3) Investments in non - controlled entities over which the Partnership exercises significant influence are accounted for under the equity method of accounting. “Equity - investment throughput” refers to the Partnership’s share of average throughput for these investments.

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	3 Months Ended
	Mar. 31, 2022
Revenue from Contract with Customer [Abstract]
Summary of Revenue from Contracts with Customers Table	The following table summarizes revenue from contracts with customers: Three Months Ended thousands 2022 2021 Revenue from customers Service revenues – fee based $ 631,598 $ 529,413 Service revenues – product based 40,867 31,652 Product sales 85,589 70,805 Total revenue from customers 758,054 631,870 Revenue from other than customers Lease revenue (1) — 42,862 Other 243 242 Total revenues and other $ 758,297 $ 674,974 _________________________________________________________________________________________ (1) Includes fixed - and variable - lease revenue from an operating and maintenance agreement entered into with Occidental. See Operating leases within Note 5.
Contract Balances Tables	The following table summarizes activity related to contract assets from contracts with customers: thousands Contract assets balance at December 31, 2021 $ 22,557 Amounts transferred to Accounts receivable, net that were included in the contract assets balance at the beginning of the period (208) Additional estimated revenues recognized 6,553 Contract assets balance at March 31, 2022 $ 28,902 Contract assets at March 31, 2022 Other current assets $ 10,897 Other assets 18,005 Total contract assets from contracts with customers $ 28,902 thousands Contract liabilities balance at December 31, 2021 $ 313,146 Cash received or receivable, excluding revenues recognized during the period 8,245 Revenues recognized that were included in the contract liability balance at the beginning of the period (11,241) Contract liabilities balance at March 31, 2022 $ 310,150 Contract liabilities at March 31, 2022 Accrued liabilities $ 8,924 Other liabilities 301,226 Total contract liabilities from contracts with customers $ 310,150
Expected Revenue Recognition from Satisfaction of Performance Obligations Table	Therefore, the following table represents only a portion of expected future revenues from existing contracts as most future revenues from customers are dependent on future variable customer volumes and, in some cases, variable commodity prices for those volumes. thousands Remainder of 2022 $ 824,085 2023 1,047,028 2024 1,021,224 2025 937,443 2026 809,384 Thereafter 2,177,567 Total $ 6,816,731

Partnership Distributions (Tabl

Partnership Distributions (Tables)	3 Months Ended
	Mar. 31, 2022
Distributions Made to Members or Limited Partners [Abstract]
Cash Distributions Tables	The Board of Directors of the general partner (the “Board”) declared the following cash distributions to the Partnership’s unitholders for the periods presented: thousands except per-unit amounts Quarters Ended Total Quarterly Total Quarterly Distribution Record 2021 March 31 $ 0.31500 $ 132,969 May 14, 2021 April 30, 2021 June 30 0.31900 134,662 August 13, 2021 July 30, 2021 September 30 0.32300 134,862 November 12, 2021 November 1, 2021 December 31 0.32700 134,749 February 14, 2022 January 31, 2022 2022 March 31 $ 0.50000 $ 206,197 May 13, 2022 May 2, 2022 thousands Quarters Ended Total Quarterly Distribution 2021 March 31 $ 137,030 May 2021 June 30 140,217 August 2021 September 30 140,217 November 2021 December 31 140,217 February 2022 2022 March 31 $ 213,513 May 2022

Equity and Partners' Capital (T

Equity and Partners' Capital (Tables)	3 Months Ended
	Mar. 31, 2022
Partners' Capital Notes [Abstract]
Calculation of Net Income (Loss) Per Unit Table	The following table provides a reconciliation between basic and diluted net income (loss) per common unit: Three Months Ended thousands except per-unit amounts 2022 2021 Net income (loss) Limited partners’ interest in net income (loss) $ 301,934 $ 181,798 Weighted-average common units outstanding Basic 403,254 413,104 Dilutive effect of non-vested phantom units 1,206 342 Diluted 404,460 413,446 Excluded due to anti-dilutive effect 469 404 Net income (loss) per common unit Basic $ 0.75 $ 0.44 Diluted $ 0.75 $ 0.44

Related-Party Transactions (Tab

Related-Party Transactions (Tables)	3 Months Ended
	Mar. 31, 2022
Related Party Transaction [Line Items]
Related-Party Transactions Tables	The following tables summarize material related - party transactions included in the Partnership’s consolidated financial statements: Consolidated statements of operations Three Months Ended thousands 2022 2021 Revenues and other Service revenues – fee based $ 414,899 $ 367,475 Service revenues – product based 2,243 4,505 Product sales 11,567 6,271 Total revenues and other 428,709 378,251 Equity income, net – related parties (1) 49,607 52,165 Operating expenses Cost of product (2) (19,543) 17,647 Operation and maintenance (59) 18,122 General and administrative (3) 1,975 4,093 Total operating expenses (17,627) 39,862 _________________________________________________________________________________________ (1) See Note 6 . (2) Includes related-party natural - gas and NGLs imbalances. (3) Includes (i) amounts charged by Occidental pursuant to the shared services agreement (see Services Agreement within this Note 5 ) and (ii) equity - based compensation expense allocated to the Partnership by Occidental, which is not reimbursed to Occidental and is reflected as a contribution to partners’ capital in the consolidated statements of equity and partners’ capital (see Incentive Plans within this Note 5 ). 5. RELATED-PARTY TRANSACTIONS Consolidated balance sheets thousands March 31, December 31, Assets Accounts receivable, net $ 274,222 $ 180,205 Other current assets 28,847 12,490 Equity investments (1) 1,163,069 1,167,187 Other assets 46,531 45,494 Total assets 1,512,669 1,405,376 Liabilities Accounts and imbalance payables 47,281 49,242 Accrued liabilities 4,476 13,914 Other liabilities 223,972 207,365 Total liabilities 275,729 270,521 _________________________________________________________________________________________ (1) See Note 6 . Consolidated statements of cash flows Three Months Ended thousands 2022 2021 Distributions from equity - investment earnings – related parties $ 45,870 $ 49,048 Capital expenditures — (2,000) Contributions to equity investments – related parties (2,070) (86) Distributions from equity investments in excess of cumulative earnings – related parties 9,925 12,141 Distributions to Partnership unitholders (1) (65,492) (66,642) Distributions to WES Operating unitholders (2) (2,805) (2,551) Net contributions from (distributions to) related parties 409 1,627 _________________________________________________________________________________________ (1) Represents distributions paid to Occidental pursuant to the partnership agreement of the Partnership (see Note 3 and Note 4 ). (2) Represents distributions paid to Occidental, through its ownership of WGRAH, pursuant to WES Operating’s partnership agreement (see Note 3 and Note 4 ).
WES Operating [Member]
Related Party Transaction [Line Items]
Related-Party Transactions Tables	The following tables summarize material related - party transactions for WES Operating (which are included in the Partnership’s consolidated financial statements) to the extent the amounts differ from the Partnership’s consolidated financial statements: Consolidated statements of operations Three Months Ended thousands 2022 2021 General and administrative (1) $ 2,948 $ 4,587 _________________________________________________________________________________________ (1) Includes (i) amounts charged by Occidental pursuant to the shared services agreement (see Services Agreement within this Note 5 ), (ii) equity - based compensation expense allocated to WES Operating by Occidental, which is not reimbursed to Occidental and is reflected as a contribution to partners’ capital in the consolidated statements of equity and partners’ capital (see Incentive Plans within this Note 5 ), and (iii) an intercompany service fee between the Partnership and WES Operating. Consolidated balance sheets thousands March 31, December 31, Other assets $ 45,619 $ 45,494 Accounts and imbalance payables (1) 64,211 97,749 Accrued liabilities 4,159 13,597 _________________________________________________________________________________________ (1) Includes balances related to transactions between the Partnership and WES Operating. Consolidated statements of cash flows Three Months Ended thousands 2022 2021 Distributions to WES Operating unitholders (1) $ (140,217) $ (127,470) _________________________________________________________________________________________ (1) Represents distributions paid to the Partnership and Occidental, through its ownership of WGRAH, pursuant to WES Operating’s partnership agreement. See Note 3 and Note 4 .

Equity Investments (Tables)

Equity Investments (Tables)	3 Months Ended
	Mar. 31, 2022
Equity Method Investments and Joint Ventures [Abstract]
Equity Investments Table	The following table presents the financial statement impact of the Partnership’s equity investments for the three months ended March 31, 2022: thousands Balance at December 31, 2021 Equity Contributions Distributions Distributions in excess of cumulative earnings (1) Balance at March 31, 2022 White Cliffs $ 40,753 $ 231 $ — $ (86) $ (899) $ 39,999 Rendezvous 22,075 (703) — (112) (651) 20,609 Mont Belvieu JV 96,728 7,891 — (7,986) (1,907) 94,726 TEG 16,116 1,482 — (1,363) — 16,235 TEP 188,925 10,086 — (10,149) (882) 187,980 FRP 196,632 9,997 — (10,220) (1,304) 195,105 Whitethorn LLC 149,690 260 255 2,575 (882) 151,898 Cactus II 171,294 3,575 — (3,617) (2,412) 168,840 Saddlehorn 110,441 5,471 — (5,354) (180) 110,378 Panola 20,044 571 — (571) (171) 19,873 Mi Vida 51,763 4,218 — (3,823) — 52,158 Ranch Westex 979 3,862 — (2,498) — 2,343 Red Bluff Express 101,747 2,666 1,815 (2,666) (637) 102,925 Total $ 1,167,187 $ 49,607 $ 2,070 $ (45,870) $ (9,925) $ 1,163,069 _________________________________________________________________________________________ (1) Distributions in excess of cumulative earnings, classified as investing cash flows in the consolidated statements of cash flows, are calculated on an individual - investment basis.

Property, Plant, and Equipment

Property, Plant, and Equipment (Tables)	3 Months Ended
	Mar. 31, 2022
Property, Plant and Equipment [Abstract]
Property, Plant, and Equipment Table	A summary of the historical cost of property, plant, and equipment is as follows: thousands Estimated Useful Life March 31, December 31, Land N/A $ 10,955 $ 10,955 Gathering systems – pipelines 30 years 5,429,779 5,386,003 Gathering systems – compressors 15 years 2,203,895 2,172,953 Processing complexes and treating facilities 25 years 3,380,819 3,375,317 Transportation pipeline and equipment 6 to 45 years 169,380 169,356 Produced - water disposal systems 20 years 885,265 882,527 Assets under construction N/A 91,268 98,473 Other 3 to 40 years 758,997 750,494 Total property, plant, and equipment 12,930,358 12,846,078 Less accumulated depreciation 4,455,162 4,333,171 Net property, plant, and equipment $ 8,475,196 $ 8,512,907

Selected Components of Workin_2

Selected Components of Working Capital (Tables)	3 Months Ended
	Mar. 31, 2022
Selected Components Of Working Capital [Abstract]
Accounts Receivable, Net Table	A summary of accounts receivable, net is as follows: The Partnership WES Operating thousands March 31, December 31, March 31, December 31, Trade receivables, net $ 601,640 $ 436,513 $ 601,640 $ 436,513 Other receivables, net 7 — 7 — Total accounts receivable, net $ 601,647 $ 436,513 $ 601,647 $ 436,513
Other Current Assets Table	A summary of other current assets is as follows: The Partnership WES Operating thousands March 31, December 31, March 31, December 31, NGLs inventory $ 1,953 $ 3,370 $ 1,953 $ 3,370 Imbalance receivables 34,757 25,309 34,757 25,309 Prepaid insurance 5,792 10,369 4,418 8,538 Contract assets 10,897 5,307 10,897 5,307 Other 2,998 1,897 2,998 1,897 Total other current assets $ 56,397 $ 46,252 $ 55,023 $ 44,421
Accrued Liabilities Table	A summary of accrued liabilities is as follows: The Partnership WES Operating thousands March 31, December 31, March 31, December 31, Accrued interest expense $ 65,562 $ 131,177 $ 65,562 $ 131,177 Short - term asset retirement obligations 12,337 9,934 12,337 9,934 Short - term remediation and reclamation obligations 8,316 7,454 8,316 7,454 Income taxes payable 2,190 1,516 2,190 1,516 Contract liabilities 8,924 27,763 8,924 27,763 Other 62,918 85,405 34,980 32,849 Total accrued liabilities $ 160,247 $ 263,249 $ 132,309 $ 210,693

Debt and Interest Expense (Tabl

Debt and Interest Expense (Tables)	3 Months Ended
	Mar. 31, 2022
Debt Instruments [Abstract]
Debt Outstanding and Debt Activity Tables	The following table presents the outstanding debt: March 31, 2022 December 31, 2021 thousands Principal Carrying Fair Value (1) Principal Carrying Fair Value (1) Short - term debt 4.000% Senior Notes due 2022 $ 502,246 $ 502,192 $ 502,250 $ 502,246 $ 502,138 $ 505,153 Floating - Rate Senior Notes due 2023 213,138 212,760 212,425 — — — Finance lease liabilities 3,201 3,201 3,201 3,794 3,794 3,794 Total short - term debt $ 718,585 $ 718,153 $ 717,876 $ 506,040 $ 505,932 $ 508,947 Long - term debt Floating - Rate Senior Notes due 2023 $ — $ — $ — $ 213,138 $ 212,642 $ 213,072 3.100% Senior Notes due 2025 732,106 728,404 728,061 732,106 728,096 764,815 3.950% Senior Notes due 2025 399,163 396,149 402,063 399,163 395,928 418,506 4.650% Senior Notes due 2026 474,242 471,761 485,982 474,242 471,629 516,473 4.500% Senior Notes due 2028 400,000 396,281 407,380 400,000 396,145 437,673 4.750% Senior Notes due 2028 400,000 397,037 413,219 400,000 396,938 444,550 4.050% Senior Notes due 2030 1,200,000 1,190,584 1,201,380 1,200,000 1,190,339 1,323,595 5.450% Senior Notes due 2044 600,000 593,769 609,529 600,000 593,733 717,804 5.300% Senior Notes due 2048 700,000 687,321 694,990 700,000 687,265 844,223 5.500% Senior Notes due 2048 350,000 342,689 347,087 350,000 342,659 418,907 5.250% Senior Notes due 2050 1,000,000 983,765 982,278 1,000,000 983,709 1,183,514 Finance lease liabilities 990 990 990 1,533 1,533 1,533 Total long - term debt $ 6,256,501 $ 6,188,750 $ 6,272,959 $ 6,470,182 $ 6,400,616 $ 7,284,665 _________________________________________________________________________________________ (1) Fair value is measured using the market approach and Level - 2 fair value inputs. 9. DEBT AND INTEREST EXPENSE Debt activity. The following table presents the debt activity for the three months ended March 31, 2022: thousands Carrying Value Balance at December 31, 2021 $ 6,906,548 Finance lease liabilities (1,135) Other 1,490 Balance at March 31, 2022 $ 6,906,903
Interest Expense Table	The following table summarizes the amounts included in interest expense: Three Months Ended thousands 2022 2021 Long - term and short - term debt $ (83,428) $ (95,722) Finance lease liabilities (42) (298) Commitment fees and amortization of debt-related costs (3,032) (3,338) Capitalized interest 1,047 865 Interest expense $ (85,455) $ (98,493)

Description of Business and B_4

Description of Business and Basis of Presentation - Assets and Investments Table (Details)	Mar. 31, 2022unit
Wholly Owned and Operated [Member] | Gathering Systems [Member]
Assets [Line Items]
Assets, number of units	17
Wholly Owned and Operated [Member] | Treating Facilities [Member]
Assets [Line Items]
Assets, number of units	37
Wholly Owned and Operated [Member] | Natural-Gas Processing Plants/Trains [Member]
Assets [Line Items]
Assets, number of units	24
Wholly Owned and Operated [Member] | Natural-Gas Liquids Pipelines [Member]
Assets [Line Items]
Assets, number of units	2
Wholly Owned and Operated [Member] | Natural-Gas Pipelines [Member]
Assets [Line Items]
Assets, number of units	5
Wholly Owned and Operated [Member] | Crude-Oil Pipelines [Member]
Assets [Line Items]
Assets, number of units	3
Operated Interests [Member] | Gathering Systems [Member]
Assets [Line Items]
Assets, number of units	2
Operated Interests [Member] | Treating Facilities [Member]
Assets [Line Items]
Assets, number of units	3
Operated Interests [Member] | Natural-Gas Processing Plants/Trains [Member]
Assets [Line Items]
Assets, number of units	3
Operated Interests [Member] | Crude-Oil Pipelines [Member]
Assets [Line Items]
Assets, number of units	1
Non-Operated Interests [Member] | Gathering Systems [Member]
Assets [Line Items]
Assets, number of units	3
Equity Interests [Member] | Gathering Systems [Member]
Assets [Line Items]
Assets, number of units	1
Equity Interests [Member] | Natural-Gas Processing Plants/Trains [Member]
Assets [Line Items]
Assets, number of units	5
Equity Interests [Member] | Natural-Gas Liquids Pipelines [Member]
Assets [Line Items]
Assets, number of units	5
Equity Interests [Member] | Natural-Gas Pipelines [Member]
Assets [Line Items]
Assets, number of units	1
Equity Interests [Member] | Crude-Oil Pipelines [Member]
Assets [Line Items]
Assets, number of units	4

Description of Business and B_5

Description of Business and Basis of Presentation - Ownership Interests and Method of Consolidation Table (Details)	3 Months Ended
	Mar. 31, 2022
Chipeta [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Ownership interest by noncontrolling interest owner	25.00%
Full Consolidation [Member] | Chipeta [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Percentage ownership interest	75.00%
Proportionate Consolidation [Member] | Springfield System [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Percentage ownership interest	50.10%
Proportionate Consolidation [Member] | Marcellus Interest Systems [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Percentage ownership interest	33.75%
Equity Investments [Member] | Mi Vida [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Equity-investment ownership percentage	50.00%
Equity Investments [Member] | Ranch Westex [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Equity-investment ownership percentage	50.00%
Equity Investments [Member] | Front Range Pipeline [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Equity-investment ownership percentage	33.33%
Equity Investments [Member] | Red Bluff Express [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Equity-investment ownership percentage	30.00%
Equity Investments [Member] | Mont Belvieu JV [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Equity-investment ownership percentage	25.00%
Equity Investments [Member] | Rendezvous [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Equity-investment ownership percentage	22.00%
Equity Investments [Member] | Texas Express Pipeline [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Equity-investment ownership percentage	20.00%
Equity Investments [Member] | Texas Express Gathering [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Equity-investment ownership percentage	20.00%
Equity Investments [Member] | Whitethorn LLC [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Equity-investment ownership percentage	20.00%
Equity Investments [Member] | Saddlehorn [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Equity-investment ownership percentage	20.00%
Equity Investments [Member] | Cactus II [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Equity-investment ownership percentage	15.00%
Equity Investments [Member] | Panola [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Equity-investment ownership percentage	15.00%
Equity Investments [Member] | White Cliffs [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Equity-investment ownership percentage	10.00%

Description of Business and B_6

Description of Business and Basis of Presentation - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Long-Term Incentive Plans [Member]
Equity-based compensation, number of units issued	565,246
Equity-based compensation, expense	$ 5.8	$ 3.5
WES Operating [Member]
Ownership interest by noncontrolling interest owner	2.00%
Chipeta [Member]
Ownership interest by noncontrolling interest owner	25.00%
WES [Member] | WES Operating [Member]
Ownership interest	98.00%

Revenue from Contracts with C_3

Revenue from Contracts with Customers - Revenue From Contracts With Customers Table (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue from customers		$ 758,054	$ 631,870
Revenue from other than customers, other		243	242
Total revenues and other	[1]	758,297	674,974
Service Revenues - Fee Based [Member]
Disaggregation of Revenue [Line Items]
Revenue from customers		631,598	529,413
Total revenues and other		631,598	572,275
Service Revenues - Product Based [Member]
Disaggregation of Revenue [Line Items]
Revenue from customers		40,867	31,652
Total revenues and other		40,867	31,652
Product Sales [Member]
Disaggregation of Revenue [Line Items]
Revenue from customers		85,589	70,805
Total revenues and other		85,589	70,805
Lease Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from other than customers		$ 0	$ 42,862
[1]	Total revenues and other includes related-party amounts of $428.7 million and $378.3 million for the three months ended March 31, 2022 and 2021, respectively. See Note 5 .

Revenue from Contracts with C_4

Revenue from Contracts with Customers - Contract Assets Table (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Change in Contracts with Customer, Asset [Roll Forward]
Contract assets balance at beginning of year	$ 22,557
Amounts transferred to Accounts receivable, net that were included in the contract assets balance at the beginning of the period	(208)
Additional estimated revenues recognized	6,553
Contract assets balance at end of period	28,902
Contract Assets [Abstract]
Other current assets	10,897	$ 5,307
Other assets	18,005
Total contract assets from contracts with customers	$ 28,902	$ 22,557

Revenue from Contracts with C_5

Revenue from Contracts with Customers - Contract Liabilities Table (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Change in Contracts with Customer, Liability [Roll Forward]
Contract liabilities balance at begining of year	$ 313,146
Cash received or receivable, excluding revenues recognized during the period	8,245
Revenues recognized that were included in the contract liability balance at the beginning of the period	(11,241)
Contract liabilities balance at end of period	310,150
Contract Liabilities [Abstract]
Accrued liabilities	8,924	$ 27,763
Other liabilities	301,226
Total contract liabilities from contracts with customers	$ 310,150	$ 313,146

Revenue from Contracts with C_6

Revenue from Contracts with Customers - Expected Revenues Table (Details) $ in Thousands	Mar. 31, 2022USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation expected to be satisfied	$ 6,816,731
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation expected to be satisfied	$ 824,085
Performance obligation expected to be satisfied, expected timing	9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation expected to be satisfied	$ 1,047,028
Performance obligation expected to be satisfied, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation expected to be satisfied	$ 1,021,224
Performance obligation expected to be satisfied, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation expected to be satisfied	$ 937,443
Performance obligation expected to be satisfied, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation expected to be satisfied	$ 809,384
Performance obligation expected to be satisfied, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation expected to be satisfied	$ 2,177,567
Performance obligation expected to be satisfied, expected timing

Revenue from Contracts with C_7

Revenue from Contracts with Customers - Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Revenue from Contracts with Customer [Line Items]
Accounts receivable, net	$ 601,647	$ 436,513
Customers [Member]
Revenue from Contracts with Customer [Line Items]
Accounts receivable, net	$ 589,500	$ 424,600

Partnership Distributions - Cas

Partnership Distributions - Cash Distributions Tables (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021
Distribution Made to Limited Partner [Line Items]
Total quarterly per-unit distribution	$ 0.50000	$ 0.32700	$ 0.32300	$ 0.31900	$ 0.31500
Total quarterly cash distribution	$ 206,197	$ 134,749	$ 134,862	$ 134,662	$ 132,969
WES Operating [Member]
Distribution Made to Limited Partner [Line Items]
Total quarterly cash distribution	$ 213,513	$ 140,217	$ 140,217	$ 140,217	$ 137,030

Partnership Distributions - Add

Partnership Distributions - Additional Information (Details)	3 Months Ended
	Mar. 31, 2022
WES [Member]
Distribution Made to Limited Partner [Line Items]
Partnership agreement day requirement of distribution of available cash	55 days

Equity and Partners' Capital -

Equity and Partners' Capital - Calculation of Net Income (Loss) Per Unit Table (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Equity [Abstract]
Limited partners' interest in net income (loss)	[1]	$ 301,934	$ 181,798
Weighted-average common units outstanding
Basic	[1]	403,254	413,104
Dilutive effect of non-vested phantom units		1,206	342
Diluted	[1]	404,460	413,446
Excluded due to anti-dilutive effect		469	404
Net income (loss) per common unit
Basic	[1]	$ 0.75	$ 0.44
Diluted	[1]	$ 0.75	$ 0.44
[1]	See Note 4.

Equity and Partners' Capital _2

Equity and Partners' Capital - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Nov. 30, 2020
Schedule of Investments [Line Items]
Common units outstanding		403,333,810		402,993,919
General partner units outstanding		9,060,641		9,060,641
Unit repurchases, authorized amount		$ 1,000,000			$ 250,000
Unit repurchases, amount		5,149	$ 16,241
Unit repurchases, remaining authorized amount		$ 994,900
Public [Member]
Schedule of Investments [Line Items]
Unit repurchases, number of units		225,355	1,115,808
Unit repurchases, amount		$ 5,100	$ 16,200
WES [Member] | Public [Member]
Schedule of Investments [Line Items]
Common units outstanding		203,052,232
Limited partner's interest		49.20%
WES [Member] | WES Operating [Member]
Schedule of Investments [Line Items]
Limited partner's interest		98.00%
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		2.20%
Occidental [Member] | WES Operating [Member]
Schedule of Investments [Line Items]
Limited partner's interest		2.00%

Related-Party Transactions - Su

Related-Party Transactions - Summary of WES Related-Party Transactions Tables (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Consolidated statements of operations [Abstract]
Revenues and other	[1]	$ 758,297	$ 674,974
Equity income, net – related parties		49,607	52,165
Cost of product		72,848	88,969
Operation and maintenance		128,976	140,332
General and administrative		48,602	45,116
Operating expenses	[2]	403,450	434,220
Consolidated balance sheets [Abstract]
Accounts receivable, net		601,647		$ 436,513
Other current assets		56,397		46,252
Equity investments		1,163,069		1,167,187
Other assets	[3]	159,707		158,696
Total assets	[4]	11,445,873		11,273,079
Accounts and imbalance payables		395,893		326,061
Accrued liabilities		160,247		263,249
Other liabilities		338,446		325,806
Total liabilities	[5]	8,175,066		8,177,319
Consolidated statements of cash flows [Abstract]
Distributions from equity-investment earnings – related parties		45,870	49,048
Capital expenditures	[6]	(83,971)	(61,783)
Contributions to equity investments – related parties		(2,070)	(86)
Distributions from equity investments in excess of cumulative earnings – related parties		9,925	12,141
Distributions to Partnership unitholders	[7]	(134,749)	(131,265)
Net contributions from (distributions to) related parties		409	1,627
Service Revenues - Fee Based [Member]
Consolidated statements of operations [Abstract]
Revenues and other		631,598	572,275
Service Revenues - Product Based [Member]
Consolidated statements of operations [Abstract]
Revenues and other		40,867	31,652
Product Sales [Member]
Consolidated statements of operations [Abstract]
Revenues and other		85,589	70,805
Related Parties [Member]
Consolidated statements of operations [Abstract]
Revenues and other		428,709	378,251
Cost of product		(19,543)	17,647
Operation and maintenance		(59)	18,122
General and administrative		1,975	4,093
Operating expenses		(17,627)	39,862
Consolidated balance sheets [Abstract]
Accounts receivable, net		274,222		180,205
Other current assets		28,847		12,490
Other assets		46,531		45,494
Total assets		1,512,669		1,405,376
Accounts and imbalance payables		47,281		49,242
Accrued liabilities		4,476		13,914
Other liabilities		223,972		207,365
Total liabilities		275,729		$ 270,521
Consolidated statements of cash flows [Abstract]
Capital expenditures		0	(2,000)
Distributions to Partnership unitholders		(65,492)	(66,642)
Related Parties [Member] | WES Operating [Member]
Consolidated statements of cash flows [Abstract]
Distributions to Partnership unitholders		(2,805)	(2,551)
Related Parties [Member] | Service Revenues - Fee Based [Member]
Consolidated statements of operations [Abstract]
Revenues and other		414,899	367,475
Related Parties [Member] | Service Revenues - Product Based [Member]
Consolidated statements of operations [Abstract]
Revenues and other		2,243	4,505
Related Parties [Member] | Product Sales [Member]
Consolidated statements of operations [Abstract]
Revenues and other		$ 11,567	$ 6,271
[1]	Total revenues and other includes related-party amounts of $428.7 million and $378.3 million for the three months ended March 31, 2022 and 2021, respectively. See Note 5 .
[2]	Total operating expenses includes related-party amounts of $(17.6) million and $39.9 million for the three months ended March 31, 2022 and 2021, respectively. See Note 5 .
[3]	Other assets includes $14.6 million and $9.8 million of NGLs line - fill inventory as of March 31, 2022, and December 31, 2021, respectively. Other assets also includes $51.9 million and $56.2 million of materials and supplies inventory as of March 31, 2022, and December 31, 2021, respectively.
[4]	Total assets includes related - party amounts of $1.5 billion and $1.4 billion as of March 31, 2022, and December 31, 2021, respectively, which includes related - party Accounts receivable, net of $274.2 million and $180.2 million as of March 31, 2022, and December 31, 2021, respectively. See Note 5 .
[5]	Total liabilities includes related - party amounts of $275.7 million and $270.5 million as of March 31, 2022, and December 31, 2021, respectively. See Note 5 .
[6]	Includes purchases from related parties of $2.0 million for the three months ended March 31, 2021. See Note 5 .
[7]	See Note 5 .

Related-Party Transactions - _2

Related-Party Transactions - Summary of WES Operating Related-Party Transactions Tables (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Consolidated statements of operations [Abstract]
General and administrative		$ 48,602	$ 45,116
Consolidated balance sheets [Abstract]
Other assets	[1]	159,707		$ 158,696
Accounts and imbalance payables		395,893		326,061
Accrued liabilities		160,247		263,249
Consolidated statements of cash flows [Abstract]
Distributions to WES Operating unitholders	[2]	(134,749)	(131,265)
Related Parties [Member]
Consolidated statements of operations [Abstract]
General and administrative		1,975	4,093
Consolidated balance sheets [Abstract]
Other assets		46,531		45,494
Accounts and imbalance payables		47,281		49,242
Accrued liabilities		4,476		13,914
Consolidated statements of cash flows [Abstract]
Distributions to WES Operating unitholders		(65,492)	(66,642)
WES Operating [Member]
Consolidated statements of operations [Abstract]
General and administrative		47,861	44,230
Consolidated balance sheets [Abstract]
Other assets	[3]	158,795		158,696
Accounts and imbalance payables		412,221		374,443
Accrued liabilities		132,309		210,693
Consolidated statements of cash flows [Abstract]
Distributions to WES Operating unitholders	[2]	(140,217)	(127,470)
WES Operating [Member] | Related Parties [Member]
Consolidated statements of operations [Abstract]
General and administrative		2,948	4,587
Consolidated balance sheets [Abstract]
Other assets		45,619		45,494
Accounts and imbalance payables		64,211		97,749
Accrued liabilities		4,159		$ 13,597
Consolidated statements of cash flows [Abstract]
Distributions to WES Operating unitholders		$ (140,217)	$ (127,470)
[1]	Other assets includes $14.6 million and $9.8 million of NGLs line - fill inventory as of March 31, 2022, and December 31, 2021, respectively. Other assets also includes $51.9 million and $56.2 million of materials and supplies inventory as of March 31, 2022, and December 31, 2021, respectively.
[2]	See Note 5 .
[3]	Other assets includes $14.6 million and $9.8 million of NGLs line - fill inventory as of March 31, 2022, and December 31, 2021, respectively. Other assets also includes $51.9 million and $56.2 million of materials and supplies inventory as of March 31, 2022, and December 31, 2021, respectively.

Related-Party Transactions - Ad

Related-Party Transactions - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Related Party Transaction [Line Items]
Operating lease, fixed-lease revenue		$ 43.9
Operating lease, variable-lease revenue		(1.1)
Related Parties [Member] | Incentive Plans [Member]
Related Party Transaction [Line Items]
Allocated equity-based compensation expense	$ 1.9	3.2
Occidental [Member]
Related Party Transaction [Line Items]
Right-of-use asset recognized		30
Present value of reduced usage fees		$ 30
Natural Gas [Member]
Related Party Transaction [Line Items]
Related-party throughput percentage	36.00%	35.00%
Crude Oil and NGLs Member]
Related Party Transaction [Line Items]
Related-party throughput percentage	89.00%	88.00%
Produced water [Member]
Related Party Transaction [Line Items]
Related-party throughput percentage	84.00%	86.00%

Equity Investments - Equity Inv

Equity Investments - Equity Investments Table (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Schedule of Equity Method Investments [Line Items]
Balance at beginning of year	$ 1,167,187
Equity income, net	49,607	$ 52,165
Contributions	2,070	86
Distributions	(45,870)	(49,048)
Distributions in excess of cumulative earnings	(9,925)	$ (12,141)
Balance at end of period	1,163,069
White Cliffs [Member]
Schedule of Equity Method Investments [Line Items]
Balance at beginning of year	40,753
Equity income, net	231
Contributions	0
Distributions	(86)
Distributions in excess of cumulative earnings	(899)
Balance at end of period	39,999
Rendezvous [Member]
Schedule of Equity Method Investments [Line Items]
Balance at beginning of year	22,075
Equity income, net	(703)
Contributions	0
Distributions	(112)
Distributions in excess of cumulative earnings	(651)
Balance at end of period	20,609
Mont Belvieu JV [Member]
Schedule of Equity Method Investments [Line Items]
Balance at beginning of year	96,728
Equity income, net	7,891
Contributions	0
Distributions	(7,986)
Distributions in excess of cumulative earnings	(1,907)
Balance at end of period	94,726
Texas Express Gathering [Member]
Schedule of Equity Method Investments [Line Items]
Balance at beginning of year	16,116
Equity income, net	1,482
Contributions	0
Distributions	(1,363)
Distributions in excess of cumulative earnings	0
Balance at end of period	16,235
Texas Express Pipeline [Member]
Schedule of Equity Method Investments [Line Items]
Balance at beginning of year	188,925
Equity income, net	10,086
Contributions	0
Distributions	(10,149)
Distributions in excess of cumulative earnings	(882)
Balance at end of period	187,980
Front Range Pipeline [Member]
Schedule of Equity Method Investments [Line Items]
Balance at beginning of year	196,632
Equity income, net	9,997
Contributions	0
Distributions	(10,220)
Distributions in excess of cumulative earnings	(1,304)
Balance at end of period	195,105
Whitethorn LLC [Member]
Schedule of Equity Method Investments [Line Items]
Balance at beginning of year	149,690
Equity income, net	260
Contributions	255
Distributions	2,575
Distributions in excess of cumulative earnings	(882)
Balance at end of period	151,898
Cactus II [Member]
Schedule of Equity Method Investments [Line Items]
Balance at beginning of year	171,294
Equity income, net	3,575
Contributions	0
Distributions	(3,617)
Distributions in excess of cumulative earnings	(2,412)
Balance at end of period	168,840
Saddlehorn [Member]
Schedule of Equity Method Investments [Line Items]
Balance at beginning of year	110,441
Equity income, net	5,471
Contributions	0
Distributions	(5,354)
Distributions in excess of cumulative earnings	(180)
Balance at end of period	110,378
Panola [Member]
Schedule of Equity Method Investments [Line Items]
Balance at beginning of year	20,044
Equity income, net	571
Contributions	0
Distributions	(571)
Distributions in excess of cumulative earnings	(171)
Balance at end of period	19,873
Mi Vida [Member]
Schedule of Equity Method Investments [Line Items]
Balance at beginning of year	51,763
Equity income, net	4,218
Contributions	0
Distributions	(3,823)
Distributions in excess of cumulative earnings	0
Balance at end of period	52,158
Ranch Westex [Member]
Schedule of Equity Method Investments [Line Items]
Balance at beginning of year	979
Equity income, net	3,862
Contributions	0
Distributions	(2,498)
Distributions in excess of cumulative earnings	0
Balance at end of period	2,343
Red Bluff Express [Member]
Schedule of Equity Method Investments [Line Items]
Balance at beginning of year	101,747
Equity income, net	2,666
Contributions	1,815
Distributions	(2,666)
Distributions in excess of cumulative earnings	(637)
Balance at end of period	$ 102,925

Property, Plant, and Equipmen_2

Property, Plant, and Equipment - Historical Cost Table (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	$ 12,930,358	$ 12,846,078
Less accumulated depreciation	4,455,162	4,333,171
Net property, plant, and equipment	8,475,196	8,512,907
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	10,955	10,955
Gathering Systems – Pipelines [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	$ 5,429,779	5,386,003
Estimated useful life	30 years
Gathering Systems – Compressors [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	$ 2,203,895	2,172,953
Estimated useful life	15 years
Processing Complexes And Treating Facilities [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	$ 3,380,819	3,375,317
Estimated useful life	25 years
Transportation Pipeline And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	$ 169,380	169,356
Transportation Pipeline And Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	6 years
Transportation Pipeline And Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	45 years
Produced-Water Disposal Systems [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	$ 885,265	882,527
Estimated useful life	20 years
Assets Under Construction [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	$ 91,268	98,473
Other [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	$ 758,997	$ 750,494
Other [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Other [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	40 years

Property, Plant, and Equipmen_3

Property, Plant, and Equipment - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Property, Plant and Equipment [Line Items]
Long-lived asset and other impairments	$ 0	$ 14,866
DJ Basin Complex [Member]
Property, Plant and Equipment [Line Items]
Long-lived asset and other impairments		$ 13,500

Selected Components of Workin_3

Selected Components of Working Capital - Accounts Receivable, Net Table (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Trade receivables, net	$ 601,640	$ 436,513
Other receivables, net	7	0
Total accounts receivable, net	601,647	436,513
WES Operating [Member]
Trade receivables, net	601,640	436,513
Other receivables, net	7	0
Total accounts receivable, net	$ 601,647	$ 436,513

Selected Components of Workin_4

Selected Components of Working Capital - Other Current Assets Table (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
NGLs inventory	$ 1,953	$ 3,370
Imbalance receivables	34,757	25,309
Prepaid insurance	5,792	10,369
Contract assets	10,897	5,307
Other	2,998	1,897
Total other current assets	56,397	46,252
WES Operating [Member]
NGLs inventory	1,953	3,370
Imbalance receivables	34,757	25,309
Prepaid insurance	4,418	8,538
Contract assets	10,897	5,307
Other	2,998	1,897
Total other current assets	$ 55,023	$ 44,421

Selected Components of Workin_5

Selected Components of Working Capital - Accrued Liabilities Table (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Accrued interest expense	$ 65,562	$ 131,177
Short-term asset retirement obligations	12,337	9,934
Short-term remediation and reclamation obligations	8,316	7,454
Income taxes payable	2,190	1,516
Contract liabilities	8,924	27,763
Other	62,918	85,405
Total accrued liabilities	160,247	263,249
WES Operating [Member]
Accrued interest expense	65,562	131,177
Short-term asset retirement obligations	12,337	9,934
Short-term remediation and reclamation obligations	8,316	7,454
Income taxes payable	2,190	1,516
Contract liabilities	8,924	27,763
Other	34,980	32,849
Total accrued liabilities	$ 132,309	$ 210,693

Debt and Interest Expense - Deb

Debt and Interest Expense - Debt Outstanding Table (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Total short-term debt, principal	$ 718,585	$ 506,040
Total short-term debt, carrying value	718,153	505,932
Total long-term debt, carrying value	6,188,750	6,400,616
Valuation, Market Approach [Member] | Level-2 Inputs [Member]
Debt Instrument [Line Items]
Short-term debt, fair value	717,876	508,947
Long-Term Debt Obligations [Member]
Debt Instrument [Line Items]
Total long-term debt, principal	6,256,501	6,470,182
Total long-term debt, carrying value	6,188,750	6,400,616
Long-Term Debt Obligations [Member] | Valuation, Market Approach [Member] | Level-2 Inputs [Member]
Debt Instrument [Line Items]
Long-term debt, fair value	6,272,959	7,284,665
WES Operating [Member]
Debt Instrument [Line Items]
Total short-term debt, carrying value	718,153	505,932
Total long-term debt, carrying value	6,188,750	6,400,616
WES Operating [Member] | Finance Lease Liability, Short Term [Member]
Debt Instrument [Line Items]
Finance leases - short-term debt	3,201	3,794
WES Operating [Member] | Finance Lease Liability, Short Term [Member] | Valuation, Market Approach [Member] | Level-2 Inputs [Member]
Debt Instrument [Line Items]
Finance leases - short-term debt	3,201	3,794
WES Operating [Member] | Finance Lease Liability, Long Term [Member]
Debt Instrument [Line Items]
Finance leases - long-term debt	990	1,533
WES Operating [Member] | Finance Lease Liability, Long Term [Member] | Valuation, Market Approach [Member] | Level-2 Inputs [Member]
Debt Instrument [Line Items]
Finance leases - long-term debt	$ 990	1,533
WES Operating [Member] | Senior Notes [Member] | 4.000% Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Senior note, interest rate	4.00%
Principal	$ 502,246	502,246
Short-term debt, carrying value	502,192	502,138
WES Operating [Member] | Senior Notes [Member] | 4.000% Senior Notes due 2022 [Member] | Valuation, Market Approach [Member] | Level-2 Inputs [Member]
Debt Instrument [Line Items]
Short-term debt, fair value	502,250	505,153
WES Operating [Member] | Senior Notes [Member] | Floating-Rate Senior Notes due 2023 [Member]
Debt Instrument [Line Items]
Principal	213,138	213,138
Short-term debt, carrying value	212,760
Long-term debt, carrying value	212,760	212,642
WES Operating [Member] | Senior Notes [Member] | Floating-Rate Senior Notes due 2023 [Member] | Valuation, Market Approach [Member] | Level-2 Inputs [Member]
Debt Instrument [Line Items]
Short-term debt, fair value	212,425
Long-term debt, fair value	$ 212,425	213,072
WES Operating [Member] | Senior Notes [Member] | 3.100% Senior Notes due 2025 [Member]
Debt Instrument [Line Items]
Senior note, interest rate	3.10%
Principal	$ 732,106	732,106
Long-term debt, carrying value	728,404	728,096
WES Operating [Member] | Senior Notes [Member] | 3.100% Senior Notes due 2025 [Member] | Valuation, Market Approach [Member] | Level-2 Inputs [Member]
Debt Instrument [Line Items]
Long-term debt, fair value	$ 728,061	764,815
WES Operating [Member] | Senior Notes [Member] | 3.950% Senior Notes due 2025 [Member]
Debt Instrument [Line Items]
Senior note, interest rate	3.95%
Principal	$ 399,163	399,163
Long-term debt, carrying value	396,149	395,928
WES Operating [Member] | Senior Notes [Member] | 3.950% Senior Notes due 2025 [Member] | Valuation, Market Approach [Member] | Level-2 Inputs [Member]
Debt Instrument [Line Items]
Long-term debt, fair value	$ 402,063	418,506
WES Operating [Member] | Senior Notes [Member] | 4.650% Senior Notes due 2026 [Member]
Debt Instrument [Line Items]
Senior note, interest rate	4.65%
Principal	$ 474,242	474,242
Long-term debt, carrying value	471,761	471,629
WES Operating [Member] | Senior Notes [Member] | 4.650% Senior Notes due 2026 [Member] | Valuation, Market Approach [Member] | Level-2 Inputs [Member]
Debt Instrument [Line Items]
Long-term debt, fair value	$ 485,982	516,473
WES Operating [Member] | Senior Notes [Member] | 4.500% Senior Notes due 2028 [Member]
Debt Instrument [Line Items]
Senior note, interest rate	4.50%
Principal	$ 400,000	400,000
Long-term debt, carrying value	396,281	396,145
WES Operating [Member] | Senior Notes [Member] | 4.500% Senior Notes due 2028 [Member] | Valuation, Market Approach [Member] | Level-2 Inputs [Member]
Debt Instrument [Line Items]
Long-term debt, fair value	$ 407,380	437,673
WES Operating [Member] | Senior Notes [Member] | 4.750% Senior Notes due 2028 [Member]
Debt Instrument [Line Items]
Senior note, interest rate	4.75%
Principal	$ 400,000	400,000
Long-term debt, carrying value	397,037	396,938
WES Operating [Member] | Senior Notes [Member] | 4.750% Senior Notes due 2028 [Member] | Valuation, Market Approach [Member] | Level-2 Inputs [Member]
Debt Instrument [Line Items]
Long-term debt, fair value	$ 413,219	444,550
WES Operating [Member] | Senior Notes [Member] | 4.050% Senior Notes due 2030 [Member]
Debt Instrument [Line Items]
Senior note, interest rate	4.05%
Principal	$ 1,200,000	1,200,000
Long-term debt, carrying value	1,190,584	1,190,339
WES Operating [Member] | Senior Notes [Member] | 4.050% Senior Notes due 2030 [Member] | Valuation, Market Approach [Member] | Level-2 Inputs [Member]
Debt Instrument [Line Items]
Long-term debt, fair value	$ 1,201,380	1,323,595
WES Operating [Member] | Senior Notes [Member] | 5.450% Senior Notes due 2044 [Member]
Debt Instrument [Line Items]
Senior note, interest rate	5.45%
Principal	$ 600,000	600,000
Long-term debt, carrying value	593,769	593,733
WES Operating [Member] | Senior Notes [Member] | 5.450% Senior Notes due 2044 [Member] | Valuation, Market Approach [Member] | Level-2 Inputs [Member]
Debt Instrument [Line Items]
Long-term debt, fair value	$ 609,529	717,804
WES Operating [Member] | Senior Notes [Member] | 5.300% Senior Notes due 2048 [Member]
Debt Instrument [Line Items]
Senior note, interest rate	5.30%
Principal	$ 700,000	700,000
Long-term debt, carrying value	687,321	687,265
WES Operating [Member] | Senior Notes [Member] | 5.300% Senior Notes due 2048 [Member] | Valuation, Market Approach [Member] | Level-2 Inputs [Member]
Debt Instrument [Line Items]
Long-term debt, fair value	$ 694,990	844,223
WES Operating [Member] | Senior Notes [Member] | 5.500% Senior Notes due 2048 [Member]
Debt Instrument [Line Items]
Senior note, interest rate	5.50%
Principal	$ 350,000	350,000
Long-term debt, carrying value	342,689	342,659
WES Operating [Member] | Senior Notes [Member] | 5.500% Senior Notes due 2048 [Member] | Valuation, Market Approach [Member] | Level-2 Inputs [Member]
Debt Instrument [Line Items]
Long-term debt, fair value	$ 347,087	418,907
WES Operating [Member] | Senior Notes [Member] | 5.250% Senior Notes due 2050 [Member]
Debt Instrument [Line Items]
Senior note, interest rate	5.25%
Principal	$ 1,000,000	1,000,000
Long-term debt, carrying value	983,765	983,709
WES Operating [Member] | Senior Notes [Member] | 5.250% Senior Notes due 2050 [Member] | Valuation, Market Approach [Member] | Level-2 Inputs [Member]
Debt Instrument [Line Items]
Long-term debt, fair value	$ 982,278	$ 1,183,514

Debt and Interest Expense - D_2

Debt and Interest Expense - Debt Activity Table (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022USD ($)
Changes in Debt Outstanding [Roll Forward]
Beginning balance	$ 6,906,548
Other	1,490
Ending balance	6,906,903
WES Operating [Member] | Finance Lease Liability [Member]
Changes in Debt Outstanding [Roll Forward]
Finance lease liabilities	$ (1,135)

Debt and Interest Expense - Int

Debt and Interest Expense - Interest Expense Table (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Debt Instruments [Abstract]
Long-term and short-term debt	$ (83,428)	$ (95,722)
Finance lease liabilities	(42)	(298)
Commitment fees and amortization of debt-related costs	(3,032)	(3,338)
Capitalized interest	1,047	865
Interest expense	$ (85,455)	$ (98,493)

Debt and Interest Expense - Add

Debt and Interest Expense - Additional Information (Details) - WES Operating [Member] - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Debt Instrument [Line Items]
Future lease payments	$ 4,300,000
3.100% Senior Notes due 2025 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Senior note, interest rate	3.10%
Senior note, effective interest rate	3.79%	4.542%
4.050% Senior Notes due 2030 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Senior note, interest rate	4.05%
Senior note, effective interest rate	4.671%	5.424%
5.250% Senior Notes due 2050 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Senior note, interest rate	5.25%
Senior note, effective interest rate	5.869%	6.629%
Floating-Rate Senior Notes due 2023 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Senior note, effective interest rate	1.84%	2.33%
5.375% Senior Notes due 2021 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Senior note, interest rate		5.375%
4.000% Senior Notes due 2022 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Senior note, interest rate	4.00%
RCF [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Facility, maximum borrowing capacity	$ 2,000,000,000
Facility, expandable maximum borrowing capacity	2,500,000,000
Facility, outstanding borrowings	0
Facility, outstanding letters of credit	5,100,000
Facility, available borrowing capacity	$ 2,000,000,000
Facility, interest rate at period end	1.95%	1.61%
Facility, fee rate	0.25%	0.25%
RCF [Member] | Revolving Credit Facility [Member] | Non-Extending Lender [Member]
Debt Instrument [Line Items]
Facility, borrowing capacity for non-extending lender	$ 100,000,000

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Liability for remediation and reclamation obligations	$ 9.8	$ 10.1