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Supplementary Oil And Gas Information (Unaudited) - Natural Gas Narrative (Details) - Natural gas - Bcf | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Reserve Quantities [Line Items] |  |  |
Change in proved developed and undeveloped reserves, net (in MMbbl) | 3,617 | 2,919 | 428
Extensions and discoveries (in MMbbl) | 545 | 173 | 106
Improved recovery (in MMbbl) | 161 | 159 | 202
Purchases of reserves in place (in MMbbl) | 1,654 | 2,615 | 34
Sales of reserves in place (in Bcf) | 1 | 4 | 0
Production (in Bcf) | 587 | 524 | 528
Economic revisions due to prices (in Bcf) | 708 | 100 | 248
Revisions of prior estimates (in Bcf) | 1,136 | 399 | 367

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- Definition Additions to proved reserves that result from (1) extension of the proved acreage of previously discovered (old) reservoirs through additional drilling in periods after discovery and (2) discovery of new fields with proved reserves or of new reservoirs of proved reserves in old fields. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Form 20-F -Section Item 18 -Subsection Instruction 2 + Details
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- Definition Revisions represent changes in previous estimates of proved reserves, either upward or downward, resulting from new information (except for an increase in proved acreage) normally obtained from development drilling and production history or resulting from change in economic factors. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Form 20-F -Section Item 18 -Subsection Instruction 2 + Details
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