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Income Taxes - Narrative (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2018 | [1] | Jun. 30, 2019 | Jun. 30, 2018 | [1] | Feb. 01, 2019
Business Acquisition [Line Items] |  |  |  |  |  |  |
Effective income tax rate | 0.00% |  |  |  |  |  |
Income tax benefit | $ 0 |  | $ 9,000,000 | $ 314,000,000 | [1] | $ 9,000,000 |
Wildhorse Resource Development Corporation |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Deferred tax liabilities |  | $ 314,000,000 |  |  |  |  | $ 314,000,000
Income tax benefit | 0 | 314,000,000 |  | 314,000,000 |  |  |
Deferred tax liability, plant, property and equipment and prepaid compensation |  | 401,000,000 |  |  |  |  |
Deferred tax assets, 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 |  |  |  |  |
[1] | Financial information for 2018 has been recast to reflect the retrospective application of the successful efforts method of accounting. See Note 1.

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