Statements of Condensed Consolidated Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests in Consolidated Subsidiaries
Beginning Balance (in shares) at Dec. 31, 2015		152,554
Beginning Balance at Dec. 31, 2015	$ 8,028,042	$ 2,049,201	$ 2,982,212	$ 46,378	$ 2,950,251
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	88,425		5,636		82,789
Net change in cash flow hedges:
Natural gas, net of tax benefit	(12,424)			(12,424)
Interest rate, net of tax expense	36			36
Pension and other post-retirement benefits liability adjustment, net of tax expense	213			213
Dividends	(4,586)		(4,586)
Stock-based compensation plans, net (in shares)		566
Stock-based compensation plans, net	(5,765)	$ (5,921)			156
Distributions to noncontrolling interests	(42,780)				(42,780)
Issuance of common units of EQT Corporation (in shares)		7,475
Issuance of common units of EQT Corporation	430,420	$ 430,420
Repurchase of common stock (in shares)		(1)
Repurchase of common stock	(10)	$ (10)
Ending Balance (in shares) at Mar. 31, 2016		160,594
Ending Balance at Mar. 31, 2016	8,481,571	$ 2,473,690	2,983,262	34,203	2,990,416
Beginning Balance (in shares) at Dec. 31, 2016		172,827
Beginning Balance at Dec. 31, 2016	9,119,247	$ 3,349,166	2,509,073	2,042	3,258,966
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	250,705		163,992		86,713
Net change in cash flow hedges:
Natural gas, net of tax benefit	(888)			(888)
Interest rate, net of tax expense	36			36
Pension and other post-retirement benefits liability adjustment, net of tax expense	76			76
Dividends	(5,206)		(5,206)
Stock-based compensation plans, net (in shares)		489
Stock-based compensation plans, net	1,242	$ 1,052			190
Distributions to noncontrolling interests	(54,636)				(54,636)
Ending Balance (in shares) at Mar. 31, 2017		173,316
Ending Balance at Mar. 31, 2017	$ 9,310,576	$ 3,350,218	$ 2,667,859	$ 1,266	$ 3,291,233