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Financial Statements (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2017
Business Acquisition [Line Items]
Stock repurchased during period (in shares)	9,946,382
Average cost of repurchased shares (in dollars per share)	$ 50.29
Authorized repurchase amount	$ 500,000,000
Rice Merger Agreement
Business Acquisition [Line Items]
Pro forma operating revenues		$ 1,042,363,000	$ 3,491,790,000
Pro forma net income		120,301,000	602,684,000
Pro forma net income attributable to noncontrolling interests		(118,353,000)	(338,546,000)
Pro forma net income attributable to EQT		$ 1,948,000	$ 264,138,000
Pro forma income per share (basic) (in dollars per share)		$ 0.01	$ 1.00
Pro forma income per share (diluted) (in dollars per share)		$ 0.00	$ 0.99

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