Consolidated Balance Sheets - WES Operating - USD ($) $ in Thousands		Sep. 30, 2019	Dec. 31, 2018	[1]
Current assets
Cash and cash equivalents		$ 117,430	$ 92,142
Accounts receivable, net	[2]	232,818	221,164
Other current assets	[3]	42,990	31,458
Total current assets		393,238	344,764
Note receivable - Anadarko		260,000	260,000
Property, plant, and equipment
Cost		12,109,923	11,258,773
Less accumulated depreciation		3,176,089	2,848,420
Net property, plant, and equipment		8,933,834	8,410,353
Goodwill		445,800	445,800
Other intangible assets		817,395	841,408
Equity investments		1,264,695	1,092,088
Other assets	[4]	63,263	62,792
Total assets		12,178,225	11,457,205
Current liabilities
Accounts and imbalance payables		273,579	443,343
Short-term debt	[5]	8,128	28,000
Accrued ad valorem taxes		45,771	36,986
Accrued liabilities		269,394	129,148
Total current liabilities		596,872	637,477
Long-term liabilities
Long-term debt		7,730,502	4,787,381
APCWH Note Payable	[6]	0	427,493
Deferred income taxes		17,890	280,017
Asset retirement obligations		319,178	300,024
Other liabilities	[7]	178,708	132,130
Total long-term liabilities		8,246,278	5,927,045
Total liabilities		8,843,150	6,564,522
Equity and partners' capital
Common units and Class C units		3,182,917	951,888
Net investment by Anadarko		0	1,388,018
Total partners' capital		3,182,917	2,339,906
Noncontrolling interest		152,158	2,552,777
Total equity and partners' capital		3,335,075	4,892,683
Total liabilities, equity and partners' capital		12,178,225	11,457,205
WES Operating [Member]
Current assets
Cash and cash equivalents		115,946	90,448
Accounts receivable, net	[8]	235,617	221,373
Other current assets	[9]	40,140	30,583
Total current assets		391,703	342,404
Note receivable - Anadarko		260,000	260,000
Property, plant, and equipment
Cost		12,109,923	11,258,773
Less accumulated depreciation		3,176,089	2,848,420
Net property, plant, and equipment		8,933,834	8,410,353
Goodwill		445,800	445,800
Other intangible assets		817,395	841,408
Equity investments		1,264,695	1,092,088
Other assets	[10]	63,263	62,792
Total assets		12,176,690	11,454,845
Current liabilities
Accounts and imbalance payables		273,579	443,343
Short-term debt	[11]	8,128	0
Accrued ad valorem taxes		45,771	36,986
Accrued liabilities		269,233	127,874
Total current liabilities		596,711	608,203
Long-term liabilities
Long-term debt		7,730,502	4,787,381
APCWH Note Payable	[12]	0	427,493
Deferred income taxes		17,890	280,017
Asset retirement obligations		319,178	300,024
Other liabilities	[13]	178,708	132,130
Total long-term liabilities		8,246,278	5,927,045
Total liabilities		8,842,989	6,535,248
Equity and partners' capital
General partner units (zero and 2,583,068 units issued and outstanding at September 30, 2019, and December 31, 2018, respectively)	[14]	0	206,862
Net investment by Anadarko		0	1,388,018
Total partners' capital		3,275,816	4,861,830
Noncontrolling interest		57,885	57,767
Total equity and partners' capital		3,333,701	4,919,597
Total liabilities, equity and partners' capital		12,176,690	11,454,845
WES Operating [Member] | Common Units [Member]
Equity and partners' capital
Common units and Class C units		3,275,816	2,475,540
WES Operating [Member] | Class C Units [Member]
Equity and partners' capital
Common units and Class C units	[14]	$ 0	$ 791,410

[1] Financial information has been recast to include the financial position and results attributable to AMA. See Note 1 and Note 3.

[2] Accounts receivable, net includes amounts receivable from affiliates (as defined in Note 1) of $91.9 million and $72.6 million as of September 30, 2019, and December 31, 2018, respectively.

[3] Other current assets includes affiliate amounts of $0.8 million and $3.7 million as of September 30, 2019, and December 31, 2018, respectively.

[4] Other assets includes affiliate amounts of $44.3 million and $42.2 million as of September 30, 2019, and December 31, 2018, respectively. Other assets also includes $3.6 million and $5.3 million of NGLs line fill as of September 30, 2019, and December 31, 2018, respectively.

[5] As of September 30, 2019, all amounts are considered affiliate. See Note 11.

[6] See Note 1 and Note 6.

[7] Other liabilities includes affiliate amounts of $87.0 million and $47.8 million as of September 30, 2019, and December 31, 2018, respectively.

[8] Accounts receivable, net includes amounts receivable from affiliates (as defined in Note 1) of $94.7 million and $72.8 million as of September 30, 2019, and December 31, 2018, respectively.

[9] Other current assets includes affiliate amounts of $0.8 million and $3.7 million as of September 30, 2019, and December 31, 2018, respectively.

[10] Other assets includes affiliate amounts of $44.3 million and $42.2 million as of September 30, 2019, and December 31, 2018, respectively. Other assets also includes $3.6 million and $5.3 million of NGLs line fill as of September 30, 2019, and December 31, 2018, respectively.

[11] As of September 30, 2019, all amounts are considered affiliate. See Note 11.

[12] See Note 1 and Note 6.

[13] Other liabilities includes affiliate amounts of $87.0 million and $47.8 million as of September 30, 2019, and December 31, 2018, respectively.

[14] Immediately prior to the closing of the Merger (as defined in Note 1), all outstanding general partner units converted into a non-economic general partner interest in WES Operating and WES Operating common units and all outstanding Class C units converted into WES Operating common units on a one-for-one basis.