Income Taxes - Narrative (Details) - USD ($)	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Business Acquisition [Line Items]
Effective income tax rate					0.10%
Deferred income tax expense		$ 10,000,000			$ (10,000,000)	$ (314,000,000)
Income tax benefit	$ 0		$ 0		$ 13,000,000	$ 314,000,000
Ownership change, cumulative shift					40.00%
Wildhorse Resource Development Corporation
Business Acquisition [Line Items]
Deferred tax liabilities				$ 314,000,000
Income tax benefit				314,000,000	$ 13,000,000
Deferred tax liability, plant, property and equipment and prepaid compensation				401,000,000
Deferred tax asset, operating loss carryforward, limitations	$ 61,000,000				$ 61,000,000
Wildhorse Resource Development Corporation | Federal
Business Acquisition [Line Items]
Deferred tax asset, operating loss carryforward				$ 87,000,000