Consolidated Balance Sheets - WES Operating - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018	[1]
Current assets
Cash and cash equivalents		$ 100,047	$ 92,142
Accounts receivable, net	[2]	212,423	221,164
Other current assets	[3]	23,472	27,056
Total current assets		335,942	340,362
Note receivable - Anadarko		260,000	260,000
Property, plant and equipment
Cost		11,580,329	11,258,773
Less accumulated depreciation		2,950,330	2,848,420
Net property, plant and equipment		8,629,999	8,410,353
Goodwill		445,800	445,800
Other intangible assets		833,404	841,408
Equity investments		1,217,156	1,092,088
Other assets	[4]	74,694	67,194
Total assets		11,796,995	11,457,205
Current liabilities
Accounts and imbalance payables		328,867	443,343
Short-term debt		2,000,000	28,000
Accrued ad valorem taxes		48,545	36,986
Accrued liabilities	[5]	141,442	129,148
Total current liabilities		2,518,854	637,477
Long-term liabilities
Long-term debt		5,208,411	4,787,381
APCWH Note Payable	[6]	0	427,493
Deferred income taxes		15,355	280,017
Asset retirement obligations		311,716	300,024
Other liabilities	[7]	151,118	132,130
Total long-term liabilities		5,686,600	5,927,045
Total liabilities		8,205,454	6,564,522
Equity and partners' capital
Common units and Class C units		3,437,922	951,888
Net investment by Anadarko		0	1,388,018
Total partners' capital		3,437,922	2,339,906
Noncontrolling interest		153,619	2,552,777
Total equity and partners' capital		3,591,541	4,892,683
Total liabilities, equity and partners' capital		11,796,995	11,457,205
WES Operating [Member]
Current assets
Cash and cash equivalents		97,728	90,448
Accounts receivable, net	[8]	214,148	221,373
Other current assets	[9]	23,434	26,181
Total current assets		335,310	338,002
Note receivable - Anadarko		260,000	260,000
Property, plant and equipment
Cost		11,580,329	11,258,773
Less accumulated depreciation		2,950,330	2,848,420
Net property, plant and equipment		8,629,999	8,410,353
Goodwill		445,800	445,800
Other intangible assets		833,404	841,408
Equity investments		1,217,156	1,092,088
Other assets	[10]	74,694	67,194
Total assets		11,796,363	11,454,845
Current liabilities
Accounts and imbalance payables		328,867	443,343
Short-term debt		2,000,000	0
Accrued ad valorem taxes		48,545	36,986
Accrued liabilities	[11]	141,267	127,874
Total current liabilities		2,518,679	608,203
Long-term liabilities
Long-term debt		5,208,411	4,787,381
APCWH Note Payable	[12]	0	427,493
Deferred income taxes		15,355	280,017
Asset retirement obligations		311,716	300,024
Other liabilities	[13]	151,118	132,130
Total long-term liabilities		5,686,600	5,927,045
Total liabilities		8,205,279	6,535,248
Equity and partners' capital
General partner units (zero and 2,583,068 units issued and outstanding at March 31, 2019, and December 31, 2018, respectively)	[14]	0	206,862
Net investment by Anadarko		0	1,388,018
Total partners' capital		3,533,398	4,861,830
Noncontrolling interest		57,686	57,767
Total equity and partners' capital		3,591,084	4,919,597
Total liabilities, equity and partners' capital		11,796,363	11,454,845
WES Operating [Member] | Common Units [Member]
Equity and partners' capital
Common units and Class C units		3,533,398	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 $68.5 million and $72.6 million as of March 31, 2019, and December 31, 2018, respectively.

[3] Other current assets includes affiliate amounts of $7.4 million and $3.7 million as of March 31, 2019, and December 31, 2018, respectively.

[4] Other assets includes affiliate amounts of $42.9 million and $42.2 million as of March 31, 2019, and December 31, 2018, respectively.

[5] Accrued liabilities includes affiliate amounts of $3.5 million and $2.2 million as of March 31, 2019, and December 31, 2018, respectively.

[6] See Note 1 and Note 6.

[7] Other liabilities includes affiliate amounts of $60.6 million and $47.8 million as of March 31, 2019, and December 31, 2018, respectively.

[8] Accounts receivable, net includes amounts receivable from affiliates (as defined in Note 1) of $70.2 million and $72.8 million as of March 31, 2019, and December 31, 2018, respectively.

[9] Other current assets includes affiliate amounts of $7.4 million and $3.7 million as of March 31, 2019, and December 31, 2018, respectively.

[10] Other assets includes affiliate amounts of $42.9 million and $42.2 million as of March 31, 2019, and December 31, 2018, respectively.

[11] Accrued liabilities includes affiliate amounts of $3.5 million and $2.2 million as of March 31, 2019, and December 31, 2018, respectively.

[12] See Note 1 and Note 6.

[13] Other liabilities includes affiliate amounts of $60.6 million and $47.8 million as of March 31, 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.