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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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