Consolidated Balance Sheets - WES Operating - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018	[1]
Current assets
Cash and cash equivalents		$ 95,795	$ 92,142
Accounts receivable, net	[2]	219,924	221,164
Other current assets	[3]	20,466	27,056
Total current assets		336,185	340,362
Note receivable - Anadarko		260,000	260,000
Property, plant and equipment
Cost		11,852,158	11,258,773
Less accumulated depreciation		3,058,512	2,848,420
Net property, plant and equipment		8,793,646	8,410,353
Goodwill		445,800	445,800
Other intangible assets		825,399	841,408
Equity investments		1,249,509	1,092,088
Other assets	[4]	69,992	67,194
Total assets		11,980,531	11,457,205
Current liabilities
Accounts and imbalance payables		240,568	443,343
Short-term debt	[5]	8,381	28,000
Accrued ad valorem taxes		30,641	36,986
Accrued liabilities		219,726	129,148
Total current liabilities		499,316	637,477
Long-term liabilities
Long-term debt		7,489,448	4,787,381
APCWH Note Payable	[6]	0	427,493
Deferred income taxes		16,175	280,017
Asset retirement obligations		320,073	300,024
Other liabilities	[7]	164,309	132,130
Total long-term liabilities		7,990,005	5,927,045
Total liabilities		8,489,321	6,564,522
Equity and partners' capital
Common units and Class C units		3,338,646	951,888
Net investment by Anadarko		0	1,388,018
Total partners' capital		3,338,646	2,339,906
Noncontrolling interest		152,564	2,552,777
Total equity and partners' capital		3,491,210	4,892,683
Total liabilities, equity and partners' capital		11,980,531	11,457,205
WES Operating [Member]
Current assets
Cash and cash equivalents		95,342	90,448
Accounts receivable, net	[8]	220,352	221,373
Other current assets	[9]	19,794	26,181
Total current assets		335,488	338,002
Note receivable - Anadarko		260,000	260,000
Property, plant and equipment
Cost		11,852,158	11,258,773
Less accumulated depreciation		3,058,512	2,848,420
Net property, plant and equipment		8,793,646	8,410,353
Goodwill		445,800	445,800
Other intangible assets		825,399	841,408
Equity investments		1,249,509	1,092,088
Other assets	[10]	69,992	67,194
Total assets		11,979,834	11,454,845
Current liabilities
Accounts and imbalance payables		240,568	443,343
Short-term debt	[11]	8,381	0
Accrued ad valorem taxes		30,641	36,986
Accrued liabilities		219,193	127,874
Total current liabilities		498,783	608,203
Long-term liabilities
Long-term debt		7,489,448	4,787,381
APCWH Note Payable	[12]	0	427,493
Deferred income taxes		16,175	280,017
Asset retirement obligations		320,073	300,024
Other liabilities	[13]	164,309	132,130
Total long-term liabilities		7,990,005	5,927,045
Total liabilities		8,488,788	6,535,248
Equity and partners' capital
General partner units (zero and 2,583,068 units issued and outstanding at June 30, 2019, and December 31, 2018, respectively)	[14]	0	206,862
Net investment by Anadarko		0	1,388,018
Total partners' capital		3,433,251	4,861,830
Noncontrolling interest		57,795	57,767
Total equity and partners' capital		3,491,046	4,919,597
Total liabilities, equity and partners' capital		11,979,834	11,454,845
WES Operating [Member] | Common Units [Member]
Equity and partners' capital
Common units and Class C units		3,433,251	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 $96.3 million and $72.6 million as of June 30, 2019, and December 31, 2018, respectively.

[3] Other current assets includes affiliate amounts of $11.1 million and $3.7 million as of June 30, 2019, and December 31, 2018, respectively.

[4] Other assets includes affiliate amounts of $43.5 million and $42.2 million as of June 30, 2019, and December 31, 2018, respectively.

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

[6] See Note 1 and Note 6.

[7] Other liabilities includes affiliate amounts of $75.1 million and $47.8 million as of June 30, 2019, and December 31, 2018, respectively.

[8] Accounts receivable, net includes amounts receivable from affiliates (as defined in Note 1) of $96.7 million and $72.8 million as of June 30, 2019, and December 31, 2018, respectively.

[9] Other current assets includes affiliate amounts of $11.1 million and $3.7 million as of June 30, 2019, and December 31, 2018, respectively.

[10] Other assets includes affiliate amounts of $43.5 million and $42.2 million as of June 30, 2019, and December 31, 2018, respectively.

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

[12] See Note 1 and Note 6.

[13] Other liabilities includes affiliate amounts of $75.1 million and $47.8 million as of June 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.