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v3.19.3.a.u2

Property, Plant and Equipment - Narrative (Details) - $ / Boe | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Property, Plant and Equipment [Line Items] |  |  |
Average depreciation and depletion rate (usd per Boe) | 12.28 | 10.32 | 7.92
Expected completion of evaluation activities on majority of unproved properties | 10 years |  |
Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Expect completion of evaluation activities on majority of unproved properties, without existing production | 3 years |  |
Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Expect completion of evaluation activities on majority of unproved properties, without existing production | 5 years |  |

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- Definition Anticipated Timing of Inclusion of Costs in Amortization Calculation, Without Existing Production, Period + References No definition available. + Details
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