EQT GP Holdings, LP (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended		6 Months Ended
	Jul. 26, 2016	May 15, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Class of Stock [Line Items]
Net proceeds					$ 217,102	$ 696,582
Net income attributable to noncontrolling interests			$ 77,838	$ 58,211	$ 160,627	$ 105,952
Limited Partner Common
Class of Stock [Line Items]
Limited partner interest (as a percent)		90.10%
Number of common units retained (in shares)		239,715,000
General Partner Common
Class of Stock [Line Items]
Incentive distribution rights distributed in respect of each common unit and general partner unit (in dollars per share)					$ 0.5250
EQGP
Class of Stock [Line Items]
Percentage of all incremental cash distributed (up to)			48.00%		48.00%
Net proceeds		$ 674,000
EQGP | Subsequent Event
Class of Stock [Line Items]
Cash distribution declared (in dollars per share)	$ 0.15
Cash distribution declared	$ 39,900
EQGP | Limited Partner Common
Class of Stock [Line Items]
Limited partner interest (as a percent)		9.90%
Underwritten IPO (in shares)		26,450,000
Underwriter's discount		$ 37,500
Structuring fees		$ 2,700
EQGP | General Partner
Class of Stock [Line Items]
General partner interest (as a percent)					1.80%
EQGP | Affiliated Entity | Limited Partner Common
Class of Stock [Line Items]
Number of common units (in shares)			21,811,643		21,811,643
Limited partner interest (as a percent)					26.60%
EQGP | Affiliated Entity | General Partner
Class of Stock [Line Items]
Number of general partner units (in shares)			1,443,015		1,443,015