Separation and Distribution and Discontinued Operations - Schedule of Cash Provided by Discontinued Operations (Details) - USD ($) $ in Thousands	10 Months Ended	12 Months Ended
	Nov. 12, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Impairment of goodwill		$ 0	$ 798,689	$ 0
Share-based compensation expense		$ 0	18,250	15,595
Midstream Business | Spinoff
Cash flows from operating activities:
Deferred income tax (benefit) expense	$ (373,405)			43,471
Depreciation	160,701			106,574
Amortization of intangible assets	36,007			5,540
Impairment of goodwill	267,878		$ 267,900	0
Other income	(51,450)			(27,281)
Share-based compensation expense	1,841			468
Cash flows from investing activities:
Capital expenditures	(732,727)			(380,151)
Capital contributions to Mountain Valley Pipeline, LLC (a)	(820,943)			(159,550)
Cash flows from financing activities:
Proceeds from issuance of debt	2,500,000			0
Increase in borrowings on credit facilities	3,378,500			544,084
Repayment of borrowings on credit facilities	(3,219,500)			(344,000)
Debt issuance costs and credit facility origination fees	(40,966)			(2,257)
Distributions to noncontrolling interests	(380,651)			(236,123)
Contribution to Strike Force Midstream LLC by minority owner, net of distribution	0			6,738
Acquisition of 25% of Strike Force Midstream LLC	$ (175,000)			$ 0