STATEMENTS OF CONSOLIDATED EQUITY - USD ($) shares in Thousands, $ in Thousands		Total	Common Stock	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Noncontrolling Interests in Discontinued Operations
Beginning Balance (in shares) at Dec. 31, 2016			172,827
Beginning Balance at Dec. 31, 2016		$ 9,119,247	$ 3,440,185	$ (91,019)	$ 2,509,073	$ 2,042	$ 3,258,966
Increase (Decrease) in Stockholders' Equity
Net (loss) income		1,858,142			1,508,529		349,613
Net change in cash flow hedges:
Natural gas, net of tax		(4,982)				(4,982)
Interest rate, net of tax		144				144
Other postretirement benefits liability adjustment, net of tax		338				338
Dividends ($0.12 per share)		(20,827)			(20,827)
Stock-based compensation plans, net (in shares)			580
Share-based compensation plans, net		26,626	$ (981)	27,417			190
Distributions to noncontrolling interests	[1]	(236,123)					(236,123)
Rice Merger, net of withholdings (in shares)			90,914
Rice Merger, net of withholdings		7,665,340	$ 5,949,729				1,715,611
Contribution from noncontrolling interest, net of distribution		6,738					6,738
Repurchase and retirement of common stock (in shares)			(1)
Repurchase and retirement of common stock		(30)	$ (30)
Ending Balance (in shares) at Dec. 31, 2017			264,320
Ending Balance at Dec. 31, 2017		18,414,613	$ 9,388,903	(63,602)	3,996,775	(2,458)	5,094,995
Increase (Decrease) in Stockholders' Equity
Net (loss) income		(2,007,158)			(2,244,568)		237,410
Net change in cash flow hedges:
Natural gas, net of tax		(4,625)				(4,625)
Interest rate, net of tax		168				168
Other postretirement benefits liability adjustment, net of tax		606				606
Dividends ($0.12 per share)		(31,375)			(31,375)
Stock-based compensation plans, net (in shares)			798
Share-based compensation plans, net		8,385	$ (6,976)	14,408			953
Distributions to noncontrolling interests	[1]	(380,651)					(380,651)
Repurchase and retirement of common stock (in shares)			(10,646)
Repurchase and retirement of common stock		(538,876)	$ (538,876)
Purchase of Strike Force Midstream LLC noncontrolling interests		(175,000)	1,818				(176,818)
Changes in ownership of consolidated subsidiaries		56,370	(158,560)				214,930
Distribution of Equitrans Midstream Corporation		(4,388,341)	$ (857,755)		1,459,330	903	(4,990,819)
Ending Balance (in shares) at Dec. 31, 2018			254,472
Ending Balance at Dec. 31, 2018		10,958,229	$ 7,828,554	(49,194)	3,184,275	(5,406)	0
Net change in cash flow hedges:
Change in accounting principle	[2]				496	(496)
Beginning Balance (in shares) at Dec. 31, 2018			254,472
Beginning Balance at Dec. 31, 2018		10,958,229	$ 7,828,554	(49,194)	3,184,275	(5,406)	0
Increase (Decrease) in Stockholders' Equity
Net (loss) income		(1,221,695)			(1,221,695)
Net change in cash flow hedges:
Interest rate, net of tax		387				387
Other postretirement benefits liability adjustment, net of tax		316				316
Dividends ($0.12 per share)		(30,655)			(30,655)
Stock-based compensation plans, net (in shares)			921
Share-based compensation plans, net		23,042	$ 6,355	16,687
Distribution of Equitrans Midstream Corporation		90,889	$ (2,234)		93,123
Other (in shares)			(222)
Other		(16,925)	$ (14,470)		(2,455)
Ending Balance (in shares) at Dec. 31, 2019			255,171
Ending Balance at Dec. 31, 2019		$ 9,803,588	$ 7,818,205	$ (32,507)	$ 2,023,089	$ (5,199)	$ 0

[1] For the year ended December 31, 2017, distributions to noncontrolling interests were $3.655 and $0.806 per common unit for EQM Midstream Partners, LP and EQGP Holdings, LP, respectively. For the year ended December 31, 2018, distributions to noncontrolling interests were $4.295, $1.123 and $0.5966 per common unit for EQM Midstream Partners, LP, EQGP Holdings, LP and RM Partners LP (formerly known as Rice Midstream Partners LP), respectively.

[2] Related to adoption of ASU 2018-02. See Note 1.