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Contingencies and Commitments - Narrative (Details) - USD ($) |  |  |  | 8 Months Ended
--- | --- | --- | --- | ---
Aug. 28, 2019 | Feb. 28, 2019 | Jul. 24, 2018 | Aug. 09, 2018
Loss Contingencies [Line Items] |  |  |  |
Settlement amount |  |  |  | $ 36,000,000
Chaparral energy, inc. | Healthcare of ontario pension plan (HOOPP) | Pending litigation |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Damages sought, value |  |  | $ 215,000,000 |
FTS international, inc. | FTS International, Inc. Case | Pending litigation |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Damages sought, value |  | $ 1,000,000 |  |
Chesapeake Appalachia, L.L.C. | Pennsylvania Department of Environmental Protection | Settled Litigation |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Settlement amount | $ 100,000 |  |  |

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