Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014		Jun. 30, 2015		Jun. 30, 2014
Revenues
Total revenues		$ 402,412	$ 345,569	[1]	$ 777,506		$ 639,286	[1]
Equity income, net	[2],[3]	18,941	13,008	[1]	37,161	[4]	22,259	[1],[4]
Operating expenses
Cost of product	[5]	146,293	120,542	[1]	284,213		214,918	[1]
Operation and maintenance	[5]	56,827	55,404	[1]	112,976		99,981	[1]
General and administrative	[5]	9,442	9,202	[1]	20,789		19,077	[1]
Property and other taxes		8,801	7,316	[1]	17,324		14,550	[1]
Depreciation, amortization and impairments		65,961	45,305	[1]	136,253		87,390	[1]
Total operating expenses		287,324	237,769	[1]	571,555		435,916	[1]
Operating income		134,029	120,808	[1]	243,112		225,629	[1]
Interest income - affiliates	[6]	4,225	4,225	[1]	8,450		8,450	[1]
Interest expense	[7]	(27,604)	(20,864)	[1]	(50,566)		(34,825)	[1]
Other income (expense), net		80	235	[1]	160		731	[1]
Income before income taxes		110,730	104,404	[1]	201,156		199,985	[1]
Income tax (benefit) expense		(1,816)	2,523	[1]	2,644		4,308	[1]
Net income		112,546	101,881	[1]	198,512		195,677	[1]
Net income attributable to noncontrolling interests		44,751	42,492	[1]	73,688		83,126	[1]
Net income attributable to Western Gas Equity Partners, LP		67,795	59,389	[1]	124,824		112,551	[1]
Limited partners' interest in net income:
Pre-acquisition net (income) loss allocated to Anadarko		0	(4,135)	[1]	(1,742)		(6,800)	[1]
Limited partners' interest in net income	[8]	67,795	55,254	[1]	123,082		105,751	[1]
Affiliates [Member]
Revenues
Gathering, processing and transportation of natural gas and natural gas liquids		138,644	107,874	[1]	266,953		200,557	[1]
Natural gas, natural gas liquids and drip condensate sales		120,672	157,806	[1]	237,908		279,391	[1]
Other		132	843	[1]	302		1,571	[1]
Total revenues	[3]	259,448	266,523	[1]	505,163		481,519	[1]
Operating expenses
Cost of product	[3]	52,139	36,890		94,546		55,246
Operation and maintenance	[9]	17,496	16,827		32,872		29,378
General and administrative	[10]	7,513	7,090		15,279		14,572
Total operating expenses		77,148	60,807		142,697		99,196
Interest expense	[11]	(4,190)	0		(5,612)		0
Third Parties [Member]
Revenues
Gathering, processing and transportation of natural gas and natural gas liquids		89,592	68,011	[1]	171,127		129,825	[1]
Natural gas, natural gas liquids and drip condensate sales		52,589	9,822	[1]	99,521		25,886	[1]
Other		783	1,213	[1]	1,695		2,056	[1]
Total revenues		142,964	79,046	[1]	272,343		157,767	[1]
Operating expenses
Interest expense		$ (23,414)	$ (20,864)		$ (44,954)		$ (34,825)
Limited Partner [Member]
Limited partners' interest in net income:
Net income per common unit - basic and diluted		$ 0.31	$ 0.25	[1]	$ 0.56		$ 0.48	[1]
Weighted-average common units outstanding - basic and diluted		218,912	218,903	[1]	218,911		218,903	[1]

[1] Financial information has been recast to include the financial position and results attributable to the DBJV system. See Note 1 and Note 2.

[2] Income earned from equity investments is classified as affiliate. See Note 1.

[3] Represents amounts earned or incurred on and subsequent to the date of acquisition of WES assets, as well as amounts earned or incurred by Anadarko on a historical basis related to WES assets prior to the acquisition of such assets by WES, recognized under gathering, treating or processing agreements, and purchase and sale agreements.

[4] Income earned on, distributions from and contributions to equity investments are classified as affiliate. See Note 1.

[5] Cost of product includes product purchases from Anadarko (as defined in Note 1) of $52.1 million and $94.5 million for the three and six months ended June 30, 2015, respectively, and $36.9 million and $55.2 million for the three and six months ended June 30, 2014, respectively. Operation and maintenance includes charges from Anadarko of $17.5 million and $32.9 million for the three and six months ended June 30, 2015, respectively, and $16.8 million and $29.4 million for the three and six months ended June 30, 2014, respectively. General and administrative includes charges from Anadarko of $7.5 million and $15.3 million for the three and six months ended June 30, 2015, respectively, and $7.1 million and $14.6 million for the three and six months ended June 30, 2014, respectively. See Note 5.

[6] Represents interest income recognized on the note receivable from Anadarko.

[7] Includes affiliate (as defined in Note 1) interest expense of $4.2 million and $5.6 million for the three and six months ended June 30, 2015, respectively, and zero for each of the three and six months ended June 30, 2014. See Note 2 and Note 9.

[8] Represents net income earned on and subsequent to the date of acquisition of WES assets (as defined in Note 1). See Note 4.

[9] Represents expenses incurred on and subsequent to the date of the acquisition of WES assets, as well as expenses incurred by Anadarko on a historical basis related to WES assets prior to the acquisition of such assets by WES.

[10] Represents general and administrative expense incurred on and subsequent to the date of WES’s acquisition of WES assets, as well as a management services fee for reimbursement of expenses incurred by Anadarko for periods prior to the acquisition of WES assets by WES. These amounts include equity-based compensation expense allocated to WES and WGP by Anadarko (see WES LTIP and WGP LTIP and Anadarko Incentive Plans within this Note 5) and amounts charged by Anadarko under the WGP omnibus agreement.

[11] For the three and six months ended June 30, 2015, includes interest expense recognized on the WGP working capital facility (see Note 9) and WES’s accretion expense recognized on the Deferred purchase price obligation - Anadarko for the acquisition of DBJV (see Note 2 and Note 9).