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Share-Based Compensation - Equity-Classified Compensation Table (Details) - USD ($) $ in Millions |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
May 05, 2020 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based compensation expense | $ 18 |  |  |  |
Restricted stock and stock options |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based compensation expense |  | $ 7 | $ 8 | $ 17 | $ 26
Restricted stock and stock options | General and administrative expenses |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based compensation expense |  | 7 | 6 | 15 | 21
Restricted stock and stock options | Oil and natural gas properties |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based compensation expense |  | 0 | 1 | 1 | 2
Restricted stock and stock options | Oil, natural gas and NGL production expenses |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based compensation expense |  | $ 0 | $ 1 | $ 1 | $ 3

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